US20090034293A1 - Light redirecting films and film systems - Google Patents

Light redirecting films and film systems Download PDF

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Publication number
US20090034293A1
US20090034293A1 US12/250,922 US25092208A US2009034293A1 US 20090034293 A1 US20090034293 A1 US 20090034293A1 US 25092208 A US25092208 A US 25092208A US 2009034293 A1 US2009034293 A1 US 2009034293A1
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Prior art keywords
light
deformities
light emitting
light source
panel assembly
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Abandoned
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US12/250,922
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Jeffery R. Parker
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Rambus International Ltd
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Individual
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Priority claimed from US09/256,275 external-priority patent/US6712481B2/en
Application filed by Individual filed Critical Individual
Priority to US12/250,922 priority Critical patent/US20090034293A1/en
Assigned to SOLID STATE OPTO LIMITED reassignment SOLID STATE OPTO LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARKER, JEFFERY R.
Publication of US20090034293A1 publication Critical patent/US20090034293A1/en
Assigned to RAMBUS INTERNATIONAL LTD. reassignment RAMBUS INTERNATIONAL LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SOLID STATE OPTO LIMITED
Priority to US12/946,077 priority patent/US20110058390A1/en
Abandoned legal-status Critical Current

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    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
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    • A61M21/02Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
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    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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    • G02B6/0058Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
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    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068Arrangements of plural sources, e.g. multi-colour light sources
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    • A61B90/30Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B2090/309Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure using white LEDs
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    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
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    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
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    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
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    • G02B6/0033Means for improving the coupling-out of light from the light guide
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    • G02B6/006Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
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Definitions

  • This invention relates to light redirecting films and film systems for redirecting light from a light source toward a direction normal to the plane of the films.
  • Light redirecting films are thin transparent or translucent optical films or substrates that redistribute the light passing through the films such that the distribution of the light exiting the films is directed more normal to the surface of the films.
  • light redirecting films were provided with prismatic grooves, lenticular grooves, or pyramids on the light exit surface of the films which changed the angle of the film/air interface for light rays exiting the films and caused the components of the incident light distribution traveling in a plane perpendicular to the refracting surfaces of the grooves to be redistributed in a direction more normal to the surface of the films.
  • Such light redirecting films are used, for example, with liquid crystal displays, used in laptop computers, word processors, avionic displays, cell phones, PDAs and the like to make the displays brighter.
  • the light entrance surface of the films usually has a transparent or matte finish depending on the visual appearance desired.
  • a matte finish produces a softer image but is not as bright due to the additional scattering and resultant light loss caused by the matte or diffuse surface.
  • the grooves of light redirecting films have been constructed so that all of the grooves meet the surface of the films at the same angle, mostly 45 degrees.
  • This design assumes a constant, diffuse angular distribution of light from the light source, such as a lambertian source, a backlighting panel using a printing or etching technology to extract light, or a backlighting panel behind heavy diffusers.
  • a light redirecting film where all of the light redirecting surfaces meet the film at the same angle is not optimized for a light source that has a nonuniform directional component to its light emission at different areas above the source.
  • the average angle about which a modern high efficiency edge lit backlight, using grooves or micro-optical surfaces to extract light changes at different distances from the light source, requiring a different angle between the light redirecting surfaces and the plane of the film to optimally redirect light toward the normal of the film.
  • a light redirecting film that can produce a softer image while eliminating the decrease in brightness associated with a matte or diffuse finish on the light input side of the film.
  • a single layer of film which can redirect a portion of the light traveling in a plane parallel to the refracting surfaces in a grooved film, that would be brighter than a single layer of film using prismatic or lenticular grooves.
  • a light redirecting film that can compensate for the different angular distributions of light that may exist for a particular light source at different positions above the source, such as backlights used to illuminate liquid crystal displays.
  • a light redirecting film system in which the film is matched or tuned to the light output distribution of a backlight or other light source to reorient or redirect more of the incident light from the backlight within a desired viewing angle.
  • the present invention relates to light redirecting films and light redirecting film systems that redistribute more of the light emitted by a backlight or other light source toward a direction more normal to the plane of the films, and to light redirecting films that produce a softer image without the brightness decrease associated with films that have a matte or diffuse finish on the light entrance surface of the films, for increased effectiveness.
  • the light exit surface of the films has a pattern of discrete individual optical elements of well defined shape for refracting the incident light distribution such that the distribution of light exiting the films is in a direction more normal to the surface of the films.
  • These individual optical elements may be formed by depressions in or projections on the exit surface of the films, and include one or more sloping surfaces for refracting the incident light toward a direction normal to the exit surface.
  • These sloping surfaces may for example include a combination of planar and curved surfaces that redirect the light within a desired viewing angle.
  • the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements as well as the perimeter shapes of the curved and planar surfaces may be varied to tailor the light output distribution of the films, to customize the viewing angle of the display device used in conjunction with the films.
  • the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to redirect more or less light that is traveling in a plane that would be parallel to the grooves of a prismatic or lenticular grooved film.
  • the size and population of the individual optical elements, as well as the curvature of the surfaces of the individual optical elements may be chosen to produce a more or less diffuse output or to randomize the input light distribution from the light source to produce a softer more diffuse light output distribution while maintaining the output distribution within a specified angular region about the direction normal to the films.
  • the light entrance surface of the films may have an optical coating such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer.
  • an optical coating such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer.
  • a matte or diffuse texture may be provided on the light entrance surface depending on the visual appearance desired. A matte finish produces a softer image but is not as bright.
  • the individual optical elements on the exit surface of the films may be randomized in such a way as to eliminate any interference with the pixel spacing of a liquid crystal display.
  • This randomization can include the size, shape, position, depth, orientation, angle or density of the optical elements. This eliminates the need for diffuser layers to defeat moiré and similar effects.
  • at least some of the individual optical elements may be arranged in groupings across the exit surface of the films, with at least some of the optical elements in each of the groupings having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the groupings that varies across the films to obtain average characteristic values beyond machining tolerances for any single optical element and to defeat moiré and interference effects with the pixel spacing of a liquid crystal display.
  • at least some of the individual optical elements may be oriented at different angles relative to each other for customizing the ability of the films to reorient/redirect light along two different axes.
  • angles that the light redirecting surfaces of the individual optical elements make with the light exit surface of the films may also be varied across the display area of a liquid crystal display to tailor the light redirecting function of the films to a light input distribution that is non-uniform across the surface of the light source.
  • the individual optical elements of the light redirecting films also desirably overlap each other, in a staggered, interlocked and/or intersecting configuration, creating an optical structure with excellent surface area coverage.
  • the individual optical elements may be arranged in groupings with some of the individual optical elements oriented along one axis and other individual optical elements oriented along another axis.
  • the orientation of the individual optical elements in each grouping may vary.
  • the size, shape, position and/or orientation of the individual optical elements of the light redirecting films may vary to account for variations in the distribution of light emitted by a light source.
  • the properties and pattern of the optical elements of light redirecting films may also be customized to optimize the light redirecting films for different types of light sources which emit different light distributions, for example, one pattern for single bulb laptops, another pattern for double bulb flat panel displays, and so on.
  • light redirecting film systems are provided in which the orientation, size, position and/or shape of the individual optical elements of the light redirecting films are tailored to the light output distribution of a backlight or other light source to reorient or redirect more of the incident light from the backlight within a desired viewing angle.
  • the backlight may include individual optical deformities that collimate light along one axis and the light redirecting films may include individual optical elements that collimate light along another axis perpendicular to the one axis.
  • FIG. 1 is a schematic side elevation view of one form of light redirecting film system in accordance with the present invention
  • FIG. 2 is an enlarged fragmentary side elevation view of a portion of the backlight and light redirecting film system of FIG. 1 ;
  • FIGS. 3 and 4 are schematic side elevation views of other forms of light redirecting film systems of the present invention.
  • FIGS. 5-20 are schematic perspective or plan views showing different patterns of individual optical elements on light redirecting films of the present invention.
  • FIGS. 5 a - 5 n are schematic perspective views of different geometric shapes that the individual optical elements on the light redirecting films may take;
  • FIG. 21 is a schematic perspective view of a light redirecting film having optical grooves extending across the film in a curved pattern facing a corner of the film;
  • FIG. 22 is a top plan view of a light redirecting film having a pattern of optical grooves extending across the film facing a midpoint on one edge of the film that decreases in curvature as the distance from the one edge increases;
  • FIG. 23 is an end elevation view of the light redirecting film of FIG. 22 as seen from the left end thereof;
  • FIG. 24 is a side elevation view of the light redirecting film of FIG. 22 ;
  • FIGS. 25 and 26 are enlarged schematic fragmentary plan views of a surface area of a backlight/light emitting panel assembly showing various forms of optical deformities formed on or in a surface of the backlight;
  • FIGS. 27 and 28 are enlarged longitudinal sections through one of the optical deformities of FIGS. 25 and 26 , respectively;
  • FIGS. 29 and 30 are enlarged schematic longitudinal sections through other forms of optical deformities formed on or in a surface of a backlight
  • FIGS. 31-39 are enlarged schematic perspective views of backlight surface areas containing various patterns of individual optical deformities of other well defined shapes
  • FIG. 40 is an enlarged schematic longitudinal section through another form of optical deformity formed on or in a surface of a backlight
  • FIGS. 41 and 42 are enlarged schematic top plan views of backlight surface areas containing optical deformities similar in shape to those shown in FIGS. 37 and 38 arranged in a plurality of straight rows along the length and width of the surface areas;
  • FIGS. 43 and 44 are enlarged schematic top plan views of backlight surface areas containing optical deformities also similar in shape to those shown in FIGS. 37 and 38 arranged in staggered rows along the length of the surface areas;
  • FIGS. 45 and 46 are enlarged schematic top plan views of backlight surface areas containing a random or variable pattern of different sized optical deformities on the surface areas;
  • FIG. 47 is an enlarged schematic perspective view of a backlight surface area showing optical deformities increasing in size as the distance of the deformities from the light input surface increases or intensity of the light increases along the length of the surface area;
  • FIGS. 48 and 49 are schematic perspective views showing different angular orientations of the optical deformities along the length and width of a backlight surface area.
  • FIGS. 50 and 51 are enlarged perspective views schematically showing how exemplary light rays emitted from a focused light source are reflected or refracted by different individual optical deformities of well defined shapes of a backlight surface area.
  • FIGS. 1 and 2 schematically show one form of light redirecting film system 1 in accordance with this invention including a light redirecting film 2 that redistributes more of the light emitted by a backlight BL or other light source toward a direction more normal to the surface of the film.
  • Film 2 may be used to redistribute light within a desired viewing angle from almost any light source for lighting, for example, a display such as a liquid crystal display, used in laptop computers, word processors, avionic displays, cell phones, PDAs and the like, to make the displays brighter.
  • the liquid crystal display can be any type including a transmissive liquid crystal display D as schematically shown in FIGS. 1 and 2 , a reflective liquid crystal display D I as schematically shown in FIG. 3 and a transflective liquid crystal display D II as schematically shown in FIG. 4 .
  • the reflective liquid crystal display D′ shown in FIG. 3 includes a back reflector 42 adjacent the back side for reflecting ambient light entering the display back out the display to increase the brightness of the display.
  • the light redirecting film 2 of the present invention is placed adjacent the top of the reflective liquid crystal display to redirect ambient light (or light from a front light) into the display toward a direction more normal to the plane of the film for reflection back out by the back reflector within a desired viewing angle to increase the brightness of the display.
  • Light redirecting film 2 may be attached to, laminated to or otherwise held in place against the top of the liquid crystal display.
  • the transflective liquid crystal display D II shown in FIG. 4 includes a transreflector T placed between the display and a backlight BL for reflecting ambient light entering the front of the display back out the display to increase the brightness of the display in a lighted environment, and for transmitting light from the backlight through the transreflector and out the display to illuminate the display in a dark environment.
  • the light redirecting film 2 may either be placed adjacent the top of the display or adjacent the bottom of the display or both as schematically shown in FIG. 4 for redirecting or redistributing ambient light and/or light from the backlight more normal to the plane of the film to make the light ray output distribution more acceptable to travel through the display to increase the brightness of the display.
  • Light redirecting film 2 comprises a thin transparent film or substrate 8 having a pattern of discrete individual optical elements 5 of well defined shape on the light exit surface 6 of the film for refracting the incident light distribution such that the distribution of the light exiting the film is in a direction more normal to the surface of the film.
  • Each of the individual optical elements 5 has a width and length many times smaller than the width and length of the film, and may be formed by depressions in or projections on the exit surface of the film. These individual optical elements 5 include at least one sloping surface for refracting the incident light toward the direction normal to the light exit surface.
  • FIG. 5 shows one pattern of individual optical elements 5 on a film 2 . These optical elements may take many different shapes.
  • FIG. 5 a shows one of the optical elements 5 of FIG. 5 which is a non-prismatic optical element having a total of two surfaces 10 , 12 , both of which are sloping.
  • One of the surfaces 10 shown in FIG. 5 a is planar or flat whereas the other surface 12 is curved.
  • both surfaces 10 , 12 intersect each other and also intersect the surface of the film.
  • both surfaces 10 ′, 12 ′ of the individual optical elements 5 ′ may be curved as schematically shown in FIG. 5 b.
  • the optical elements may each have only one surface that is curved and sloping and intersects the film.
  • FIG. 5 c shows one such optical element 5 II in the shape of a cone 13
  • FIG. 5 d shows another such optical element 5 III having a semispherical or dome shape 14 .
  • such optical elements may have more than one sloping surface intersecting the film.
  • FIG. 5 e shows an optical element 5 IV having a total of three surfaces, all of which intersect the film and intersect each other. Two of the surfaces 15 and 16 are curved, whereas the third surface 17 is planar.
  • FIG. 5 f shows an optical element 5 V in the shape of a pyramid 18 with four triangular shaped sides 19 that intersect each other and intersect the film.
  • the sides 19 of the pyramid 18 may all be of the same size and shape as shown in FIG. 5 f , or the sides 19 I of the pyramid 18 I may be stretched so the sides of the optical element 5 VI have different perimeter shapes as shown in FIG. 5 g .
  • the optical elements may have any number of planar sloping sides.
  • FIG. 5 h shows an optical element 5 VII with four planar sloping sides 20
  • FIG. 5 i shows an optical element 5 VIII with eight planar sloping sides 20 I .
  • the individual optical elements may also have more than one curved and more than one planar sloping surface, all intersecting the film.
  • FIG. 5 j shows an optical element 5 IX having a pair of intersecting oppositely sloping planar sides 22 and oppositely rounded or curved ends or sides 23 .
  • the sloping planar sides 22 I and 22 II and curved ends or sides 23 I and 23 II of optical elements 5 X and 5 xi may have different angled slopes as shown in FIGS. 5 k and 5 l .
  • the optical elements may have at least one curved surface that does not intersect the film.
  • One such optical element 5 XII is shown in FIG.
  • optical elements 5 XIII may be curved along their length as shown in FIG. 5 n.
  • the individual optical elements with a combination of planar and curved surfaces redirects or redistributes a larger viewing area than is possible with a grooved film.
  • the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to tailor the light output distribution of the film to customize the viewing area of a display device used in conjunction with the film.
  • the light entrance surface 7 of the film 2 may have an optical coating 25 (see FIG. 2 ) such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer.
  • an optical coating 25 such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer.
  • a matte or diffuse texture may be provided on the light entrance surface 7 depending on the visual appearance desired. A matte finish produces a softer image but is not as bright.
  • the combination of planar and curved surfaces of the individual optical elements of the present invention may be configured to redirect some of the light rays impinging thereon in different directions to produce a softer image without the need for an additional diffuser or matte finish on the entrance surface of the film.
  • FIGS. 6 , 7 , 13 and 15 show optical elements 5 XIV , 5 XV , 5 XVI , and 5 XVII of light redirecting films 2 I , 2 II , 2 III and 2 IV staggered with respect to each other;
  • FIGS. 8-10 show the optical elements 5 XVIII , 5 XIX and 5 XX of light redirecting films 2 V , 2 VI and 2 VII intersecting each other;
  • FIGS. 11 and 12 show the optical elements intersecting 5 XXI and 5 XXII of light redirecting films 2 VIII and 2 IX interlocking each other.
  • the slope angle, density, position, orientation, height or depth, shape, and/or size of the optical elements of the light redirecting film may be matched or tuned to the particular light output distribution of a backlight BL or other light source to account for variations in the distribution of light emitted by the backlight in order to redistribute more of the light emitted by the backlight within a desired viewing angle.
  • the angle that the sloping surfaces (e.g., surfaces 10 , 12 ) of the optical elements 5 make with the surface of the light redirecting film 2 may be varied as the distance from the backlight BL from a light source 26 increases to account for the way the backlight emits light rays R at different angles as the distance from the light source increases as schematically shown in FIG.
  • the backlight BL itself may be designed to emit more of the light rays at lower angles to increase the amount of light emitted by the backlight and rely on the light redirecting film to redistribute more of the emitted light within a desired viewing angle.
  • the individual optical elements of the light redirecting film may be selected to work in conjunction with the optical deformations of the backlight to produce an optimized output light ray angle distribution from the system.
  • FIGS. 2 , 5 and 9 show different patterns of individual optical elements all of the same height or depth
  • FIGS. 7 , 8 , 10 , 13 and 14 show different patterns of individual optical elements of different shapes, sizes and height or depth.
  • the individual optical elements 5 XXIII of the light redirecting film 2 X of FIG. 14 are also shown arranged in alternating rows along the width or length of the film.
  • the individual optical elements 5 XXV and 5 XXVI may also be randomized on the film 2 XI and 2 XII as schematically shown in FIGS. 16 and 17 in such a way as to eliminate any interference with the pixel spacing of a liquid crystal display. This eliminates the need for optical diffuser layers 30 shown in FIGS. 1 and 2 to defeat moiré and similar effects.
  • at least some of the individual optical elements may be arranged in groupings 32 , 32 I and 32 II across the film, with at least some of the optical elements in each grouping having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the groupings that varies across the film as schematically shown in FIGS.
  • At least some of the optical elements in each grouping may have a different depth or height that collectively produce an average depth or height characteristic for each grouping that varies across the film. Also, at least some of the optical elements in each grouping may have a different slope angle that collectively produce an average slope angle for each grouping that varies across the film. Further, at least one sloping surface of the individual optical elements in each grouping may have a different width or length that collectively produce an average width or length characteristic in each grouping that varies across the film.
  • the individual optical elements include a combination of planar and curved surfaces, for example planar and curved surfaces 10 II , 12 II , 10 III , 12 III and 10 IV , 12 IV as shown in FIGS. 7 , 13 and 15 , respectively, the curvature of the curved surfaces, or the ratio of the curved area to the planar area of the individual optical elements as well as the perimeter shapes of the curved and planar surfaces may be varied to tailor the light output distribution of the film.
  • the curvature of the curved surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to redirect more or less light that is traveling in a plane that would be parallel to the grooves of a prismatic or lenticular grooved film, partially or completely replacing the need for a second layer of light redirecting film.
  • at least some of the individual optical elements may be oriented at different angles relative to each other as schematically shown in FIGS. 13 and 16 to redistribute more of the light emitted by a light source along two different axes in a direction more normal to the surface of the film, partially or completely replacing the need for a second layer of light redirecting film.
  • two layers of such light redirecting film each having the same or different patterns of individual optical elements thereon may be placed between a light source and viewing area with the layers rotated 90 degrees (or other angles greater than 0 degrees and less than 90 degrees) with respect to each other so that the individual optical elements on the respective film layers redistribute more of the light emitted by a light source traveling in different planar directions in a direction more normal to the surface of the respective films.
  • the light redirecting film 2 IV may have a pattern of optical elements 5 XVII that varies at different locations on the film as schematically shown in FIG. 15 to redistribute the light ray output distribution from different locations of a backlight or other light source to redistribute the light ray output distribution from the different locations toward a direction normal to the film.
  • the properties and pattern of the optical elements of the light redirecting film may be customized to optimize the light redirecting film for different types of light sources which emit different light distributions, for example, one pattern for single bulb laptops, another pattern for double bulb flat panel displays, and so on.
  • FIG. 17 shows the optical elements 5 XXVI arranged in a radial pattern from the outside edges of the film 2 XII toward the center to redistribute the light ray output distribution of a backlight BL that receives light from cold cathode fluorescent lamp 26 I along all four side edges of the backlight.
  • FIG. 18 shows the optical elements 5 XXVII arranged in a pattern of angled groupings 32 III across the film 2 that are tailored to redistribute the light ray output distribution of a backlight BL that receives light from one cold cathode fluorescent lamp 26 I or a plurality of light emitting diodes 26 II along one input edge of the backlight.
  • FIG. 19 shows the optical elements 5 XXVIII arranged in a radial type pattern facing a corner of the film 2 XIV to redistribute the light ray output distribution of a backlight BL that is corner lit by a light emitting diode 26 II .
  • FIG. 20 shows the optical elements 5 XXIX arranged in a radial type pattern facing a midpoint on one input edge of the film 2 XV to redistribute the light ray output distribution of a backlight BL that is lighted at a midpoint of one input edge of the backlight by a single light emitting diode 26 II .
  • FIG. 21 shows a light redirecting film 2 XVI having optical grooves 35 extending across the film in a curved pattern facing a corner of the film to redistribute the light ray output distribution of a backlight BL that is corner lit by a light emitting diode 26 II
  • FIGS. 22-24 show a light redirecting film 2 XVII having a pattern of optical grooves 35 I extending across the film facing a midpoint along one edge of the film that decreases in curvature as the distance from the one edge increases to redistribute the light ray output distribution of a backlight BL that is edge lit by a light emitting diode 26 II at a midpoint of one input edge of the backlight.
  • a roll 41 of the film may be provided having a repeating pattern of optical elements thereon as schematically shown in FIG. 15 to permit a selected area of the pattern that best suits a particular application to be die cut from the roll of film.
  • the backlight BL may be substantially flat, or curved, or may be a single layer or multi-layers, and may have different thicknesses and shapes as desired. Moreover, the backlight may be flexible or rigid, and be made of a variety of compounds. Further, the backlight may be hollow, filled with liquid, air, or be solid, and may have holes or ridges.
  • the light source 26 may be of any suitable type including, for example, an arc lamp, an incandescent bulb which may also be colored, filtered or painted, a lens end bulb, a line light, a halogen lamp, a light emitting diode (LED), a chip from an LED, a neon bulb, a cold cathode fluorescent lamp, a fiber optic light pipe transmitting from a remote source, a laser or laser diode, or any other suitable light source.
  • the light source 26 may be a multiple colored LED, or a combination of multiple colored radiation sources in order to provide a desired colored or white light output distribution.
  • a plurality of colored lights such as LEDs of different colors (e.g., red, blue, green) or a single LED with multiple color chips may be employed to create white light or any other colored light output distribution by varying the intensities of each individual colored light.
  • LEDs of different colors e.g., red, blue, green
  • a single LED with multiple color chips may be employed to create white light or any other colored light output distribution by varying the intensities of each individual colored light.
  • a pattern of optical deformities may be provided on one or both sides of the backlight BL or on one or more selected areas on one or both sides of the backlight as desired.
  • optical deformities means any change in the shape or geometry of a surface and/or coating or surface treatment that causes a portion of the light to be emitted from the backlight.
  • These deformities can be produced in a variety of manners, for example, by providing a painted pattern, an etched pattern, machined pattern, a printed pattern, a hot stamp pattern, or a molded pattern or the like on selected areas of the backlight.
  • An ink or print pattern may be applied for example by pad printing, silk printing, inkjet, heat transfer film process or the like.
  • the deformities may also be printed on a sheet or film which is used to apply the deformities to the backlight.
  • This sheet or film may become a permanent part of the backlight for example by attaching or otherwise positioning the sheet or film against one or both sides of the backlight in order to produce a desired effect.
  • the light output of the backlight can be controlled.
  • the deformities may be used to control the percent of light output from a light emitting area of the backlight. For example, less and/or smaller size deformities may be placed on surface areas where less light output is wanted. Conversely, a greater percentage of and/or larger deformities may be placed on surface areas of the backlight where greater light output is desired.
  • Varying the percentages and/or size of deformities in different areas of the backlight is necessary in order to provide a substantially uniform light output distribution.
  • the amount of light traveling through the backlight will ordinarily be greater in areas closer to the light source than in other areas further removed from the light source.
  • a pattern of deformities may be used to adjust for the light variances within the backlight, for example, by providing a denser concentration of deformities with increased distance from the light source thereby resulting in a more uniform light output distribution from the backlight.
  • the deformities may also be used to control the output ray angle distribution from the backlight to suit a particular application. For example, if the backlight is used to backlight a liquid crystal display, the light output will be more efficient if the deformities (or a light redirecting film is used in combination with the backlight) direct the light rays emitted by the backlight at predetermined ray angles such that they will pass through the liquid crystal display with low loss. Additionally, the pattern of optical deformities may be used to adjust for light output variances attributed to light extractions of the backlight.
  • the pattern of optical deformities may be printed on the backlight surface areas utilizing a wide spectrum of paints, inks, coatings, epoxies or the like, ranging from glossy to opaque or both, and may employ half-tone separation techniques to vary the deformity coverage. Moreover, the pattern of optical deformities may be multiple layers or vary in index of refraction.
  • Print patterns of optical deformities may vary in shapes such as dots, squares, diamonds, ellipses, stars, random shapes, and the like. Also, print patterns of sixty lines per inch or finer are desirably employed. This makes the deformities or shapes in the print patterns nearly invisible to the human eye in a particular application, thereby eliminating the detection of gradient or banding lines that are common to light extracting patterns utilizing larger elements. Additionally, the deformities may vary in shape and/or size along the length and/or width of the backlight. Also, a random placement pattern of the deformities may be utilized throughout the length and/or width of the backlight. The deformities may have shapes or a pattern with no specific angles to reduce moiré or other interference effects.
  • Examples of methods to create these random patterns are printing a pattern of shapes using stochastic print pattern techniques, frequency modulated half tone patterns, or random dot half tones.
  • the deformities may be colored in order to effect color correction in the backlight.
  • the color of the deformities may also vary throughout the backlight, for example, to provide different colors for the same or different light output areas.
  • optical deformities including prismatic or lenticular grooves or cross grooves, or depressions or raised surfaces of various shapes using more complex shapes in a mold pattern may be molded, etched, stamped, thermoformed, hot stamped or the like into or on one or more surface areas of the backlight.
  • the prismatic or lenticular surfaces, depressions or raised surfaces will cause a portion of the light rays contacted thereby to be emitted from the backlight.
  • the angles of the prisms, depressions or other surfaces may be varied to direct the light in different directions to produce a desired light output distribution or effect.
  • the reflective or refractive surfaces may have shapes or a pattern with no specific angles to reduce moiré or other interference effects.
  • a back reflector 42 may be attached or positioned against one side of the backlight BL as schematically shown in FIGS. 1 and 2 in order to improve light output efficiency of the backlight by reflecting the light emitted from that side back through the backlight for emission through the opposite side.
  • a pattern of optical deformities 50 may be provided on one or both sides of the backlight as schematically shown in FIGS. 1 and 2 in order to change the path of the light so that the internal critical angle is exceeded and a portion of the light is emitted from one or both sides of the backlight.
  • FIGS. 25-28 show optical deformities 50 I , 50 II which may either be individual projections 51 on the respective backlight surface areas 52 or individual depressions 53 in such surface areas 52 I of a backlight Bl I , BL II .
  • each of these optical deformities has a well defined shape including a reflective or refractive surface 54 , 54 I (hereafter sometimes collectively referred to as a reflective/refractive surface) that intersects the respective backlight surface area 52 , 52 I at one edge 55 , 55 I and has a uniform slope throughout its length for more precisely controlling the emission of light by each of the deformities.
  • each reflective/refractive surface 54 , 54 I is an end wall 57 , 57 I of each deformity that intersects the respective panel surface area 52 , 52 I at a greater included angle I, I I than the included angle I II , I III between the reflective/refractive surfaces 54 , 54 I and the panel surface area 52 , 52 I (see FIGS. 27 and 28 ) to minimize the projected surface area of the end walls on the panel surface area.
  • This allows more deformities to be placed on or in the panel surface areas than would otherwise be possible if the projected surface areas of the end walls 57 , 57 I were substantially the same as or greater than the projected surface areas of the reflective/refractive surfaces 54 , 54 I .
  • FIGS. 25 and 26 the peripheral edge portions 56 , 56 I of the reflective/refractive surfaces 54 , 54 I and associated end walls 57 , 57 I are curved in the transverse direction. Also in FIGS. 27 and 28 the end walls 57 , 57 I of the deformities are shown extending substantially perpendicular to the reflective/refractive surfaces 54 , 54 I of the deformities. Alternatively, such end walls may extend substantially perpendicular to the panel surface areas 52 , 52 I as schematically shown in FIGS. 29 and 30 . This virtually eliminates any projected surface area of the end walls on the panel surface areas whereby the density of the deformities on the panel surface areas may be even further increased.
  • the optical deformities may also be of other well defined shapes to obtain a desired light output distribution from a panel surface area.
  • FIG. 31 shows individual light extracting deformities 58 on a panel surface area 52 III each including a generally planar, rectangular reflective/refractive surface 59 and associated end wall 60 of a uniform slope throughout their length and width and generally planar side walls 61 .
  • the deformities 58 I may have rounded or curved side walls 62 on a panel surface area 52 IV as schematically shown in FIG. 32 .
  • FIG. 33 shows individual light extracting deformities 63 on a panel surface area 52 V each including a planar, sloping triangular shaped reflective/refractive surface 64 and associated planar, generally triangularly shaped side walls or end walls 65 .
  • FIG. 34 shows individual light extracting deformities 66 on a panel surface area 52 VI each including a planar sloping reflective/refractive surface 67 having angled peripheral edge portions 68 and associated angled end and side walls 69 and 70 .
  • FIG. 35 shows individual light extracting deformities 71 on a panel surface area 52 VII which are generally conically shaped
  • FIG. 36 shows individual light extracting deformities 72 on a panel surface area 52 VIII each including a rounded reflective/refractive surface 73 and rounded end walls 74 and rounded or curved side walls 75 all blended together.
  • These additional surfaces will reflect or refract other light rays impinging thereon in different directions to spread light across the backlight/panel member BL to provide a more uniform distribution of light emitted from the panel member.
  • FIGS. 37-39 show deformities 76 , 77 and 78 in the form of individual projections on a panel surface area 52 IX , 52 X , 52 XI having representative shapes similar to those shown in FIGS. 31 , 32 and 35 , respectively, except that each deformity is intersected by a planar surface 79 , 79 I , 79 II in parallel spaced relation to the panel surface area.
  • FIG. 37-39 show deformities 76 , 77 and 78 in the form of individual projections on a panel surface area 52 IX , 52 X , 52 XI having representative shapes similar to those shown in FIGS. 31 , 32 and 35 , respectively, except that each deformity is intersected by a planar surface 79 , 79 I , 79 II in parallel spaced relation to the panel surface area.
  • FIG. 37-39 show deformities 76 , 77 and 78 in the form of individual projections on a panel surface area 52 IX , 52 X
  • FIG. 40 shows one of a multitude of deformities 80 in the form of individual depressions 81 in a panel surface area 52 XII each intersected by a planar surface 79 III in parallel spaced relation to the general planar surface of the panel surface area. Any light rays that impinge on such planar surfaces at internal angles less than the critical angle for emission of light from the panel surface area will be internally reflected by the planar surfaces, whereas any light rays impinging on such planar surfaces at internal angles greater than the critical angle will be emitted by the planar surfaces with minimal optical discontinuities, as schematically shown in FIG. 40 .
  • the reflective/refractive surfaces extend at an angle away from the panel in a direction generally opposite to that in which the light rays from the light source 26 travel through the panel as schematically shown in FIGS. 27 and 29 .
  • the reflective/refractive surfaces extend at an angle into the panel in the same general direction in which the light rays from the light source 26 travel through the panel member as schematically shown in FIGS. 28 and 30 .
  • the slopes of the light reflective/refractive surfaces of the deformities may be varied to cause the light rays impinging thereon to be either refracted out of the light emitting panel or reflected back through the panel and emitted out the opposite side of the panel which may be etched to diffuse the light emitted therefrom or covered by a light redirecting film to produce a desired effect.
  • the pattern of optical deformities on the panel surface area may be uniform or variable as desired to obtain a desired light output distribution from the panel surface areas.
  • FIGS. 41 and 42 show deformities 76 I and 77 I similar in shape to those shown in FIGS.
  • FIGS. 43 and 44 show such deformities 76 II and 77 II arranged in staggered rows that overlap each other along the length of a panel surface area 52 XV , 52 XVI .
  • FIGS. 45 and 46 show a random or variable pattern of different size deformities 58 II , 58 III similar in shape to those shown in FIGS. 31 and 32 , respectively, arranged in staggered rows on a panel surface area 52 XVII , 52 XVIII , whereas FIG. 47 shows deformities 77 III similar in shape to those shown in FIG.
  • the deformities are shown in FIGS. 45 and 46 arranged in clusters 82 , 82 I across the panel surface, with at least some of the deformities in each cluster having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the clusters that varies across the panel surface.
  • at least some of the deformities in each of the clusters may have a different depth or height or different slope or orientation that collectively produce an average depth or height characteristic or average slope or orientation of the sloping surface that varies across the panel surface.
  • each of the clusters may have a different width or length that collectively produce an average width or length characteristic that varies across the panel surface. This allows one to obtain a desired size or shape characteristic beyond machinery tolerances, and also defeats moiré and interference effects.
  • FIGS. 48 and 49 schematically show different angular orientations of optical deformities 85 , 85 I of any desired shape along the length and width of a panel surface area 52 XX , 52 XXI of a light emitting panel assembly backlight.
  • the deformities are arranged in straight rows 86 along the length of the panel surface area but the deformities in each of the rows are oriented to face the light source 26 so that all of the deformities are substantially in line with the light rays being emitted from the light source.
  • the deformities 85 I are also oriented to face the light source 26 similar to FIG. 48 .
  • the rows 87 of deformities in FIG. 49 are in substantial radial alignment with the light source 26 .
  • FIGS. 50 and 51 schematically show how exemplary light rays 90 , 90 I emitted from a focused light source 26 insert molded or cast within a light transition area 91 , 91 I of a light emitting panel assembly backlight BL III , BL IV in accordance with this invention are reflected during their travel through the light emitting panel member 92 , 92 I until they impinge upon individual light extracting deformities 50 III , 77 IV of well defined shapes on or in a panel surface area 52 XXII , 52 XXIII causing more of the light rays to be reflected or refracted out of one side 93 , 93 I of the panel member than the other side 94 , 94 I .
  • FIG. 50 and 51 schematically show how exemplary light rays 90 , 90 I emitted from a focused light source 26 insert molded or cast within a light transition area 91 , 91 I of a light emitting panel assembly backlight BL III , BL IV in accordance
  • the exemplary light rays 90 are shown being reflected by the reflective/refractive surfaces 54 III of the deformities 50 III in the same general direction out through the same side 93 of the panel member, whereas in FIG. 51 the light rays 90 I are shown being scattered in different directions within the panel member 92 I by the rounded side walls 62 I of the deformities 77 IV before the light rays are reflected/refracted out of the same side 93 I of the panel member.
  • Such a pattern of individual light extracting deformities of well defined shapes in accordance with the present invention can cause 60 to 70% or more of the light received through the input edge 95 I of the panel member to be emitted from the same side of the panel member.
  • the light redirecting films of the present invention redistribute more of the light emitted by a backlight or other light source toward a direction more normal to the plane of the films.
  • the light redirecting films and backlights of the present invention may be tailored or tuned to each other to provide a system in which the individual optical elements of the light redirecting films work in conjunction with the optical deformities of the backlights to produce an optimized output light ray angle distribution from the system.

Abstract

Light emitting assembly includes a generally planar optical conductor having at least one output region for emitting light and at least one light source positioned adjacent at least one light input edge located on a side or at or near a corner of the optical conductor for directing light into the optical conductor. The light source has a total length that is quite small in relation to the length and width of the optical conductor and is configured to generate light having an output distribution defined by a greater width component than height component.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is continuation of U.S. patent application Ser. No. 12/054,680, filed Mar. 25, 2008, which is a division of U.S. patent application Ser. No. 11/484,063, filed Jul. 11, 2006, now U.S. Pat. No. 7,364,342, which is a division of U.S. patent application Ser. No. 10/729,113, filed Dec. 5, 2003, now U.S. Pat. No. 7,090,389, which is a division of U.S. patent application Ser. No. 09/909,318, filed Jul. 19, 2001, now U.S. Pat. No. 6,752,505, which is a continuation-in-part of U.S. patent application Ser. No. 09/256,275, filed Feb. 23, 1999, now U.S. Pat. No. 6,712,481, the entire disclosures of which are incorporated herein by reference.
  • FIELD OF THE INVENTION
  • This invention relates to light redirecting films and film systems for redirecting light from a light source toward a direction normal to the plane of the films.
  • BACKGROUND OF THE INVENTION
  • Light redirecting films are thin transparent or translucent optical films or substrates that redistribute the light passing through the films such that the distribution of the light exiting the films is directed more normal to the surface of the films. Heretofore, light redirecting films were provided with prismatic grooves, lenticular grooves, or pyramids on the light exit surface of the films which changed the angle of the film/air interface for light rays exiting the films and caused the components of the incident light distribution traveling in a plane perpendicular to the refracting surfaces of the grooves to be redistributed in a direction more normal to the surface of the films. Such light redirecting films are used, for example, with liquid crystal displays, used in laptop computers, word processors, avionic displays, cell phones, PDAs and the like to make the displays brighter.
  • The light entrance surface of the films usually has a transparent or matte finish depending on the visual appearance desired. A matte finish produces a softer image but is not as bright due to the additional scattering and resultant light loss caused by the matte or diffuse surface.
  • Heretofore, most applications used two grooved film layers rotated relative to each other such that the grooves in the respective film layers are at 90 degrees relative to each other. The reason for this is that a grooved light redirecting film will only redistribute, towards the direction normal to the film surface, the components of the incident light distribution traveling in a plane perpendicular to the refracting surfaces of the grooves. Therefore, to redirect light toward the normal of the film surface in two dimensions, two grooved film layers rotated 90 degrees with respect to each other are needed, one film layer to redirect light traveling in a plane perpendicular to the direction of its grooves and the other film layer to redirect light traveling in a plane perpendicular to the direction of its grooves.
  • Attempts have been made in the past to create a single layer light redirecting film that will redirect components of the incident light distribution traveling along two different axes 90 degrees to each other. One known way of accomplishing this is to provide a single layer film with two sets of grooves extending perpendicular to each other resulting in a pyramid structure which redirects light traveling in both such directions. However, such a film produces a much lower brightness than two film layers each with a single groove configuration rotated 90 degrees with respect to each other because the area that is removed from the first set of grooves by the second set of grooves in a single layer film reduces the surface area available to redirect light substantially by 50% in each direction of travel.
  • In addition, heretofore, the grooves of light redirecting films have been constructed so that all of the grooves meet the surface of the films at the same angle, mostly 45 degrees. This design assumes a constant, diffuse angular distribution of light from the light source, such as a lambertian source, a backlighting panel using a printing or etching technology to extract light, or a backlighting panel behind heavy diffusers. A light redirecting film where all of the light redirecting surfaces meet the film at the same angle is not optimized for a light source that has a nonuniform directional component to its light emission at different areas above the source. For example, the average angle about which a modern high efficiency edge lit backlight, using grooves or micro-optical surfaces to extract light, changes at different distances from the light source, requiring a different angle between the light redirecting surfaces and the plane of the film to optimally redirect light toward the normal of the film.
  • There is thus a need for a light redirecting film that can produce a softer image while eliminating the decrease in brightness associated with a matte or diffuse finish on the light input side of the film. Also, there is a need for a single layer of film which can redirect a portion of the light traveling in a plane parallel to the refracting surfaces in a grooved film, that would be brighter than a single layer of film using prismatic or lenticular grooves. In addition, there is a need for a light redirecting film that can compensate for the different angular distributions of light that may exist for a particular light source at different positions above the source, such as backlights used to illuminate liquid crystal displays. Also, there is a need for a light redirecting film system in which the film is matched or tuned to the light output distribution of a backlight or other light source to reorient or redirect more of the incident light from the backlight within a desired viewing angle.
  • SUMMARY OF THE INVENTION
  • The present invention relates to light redirecting films and light redirecting film systems that redistribute more of the light emitted by a backlight or other light source toward a direction more normal to the plane of the films, and to light redirecting films that produce a softer image without the brightness decrease associated with films that have a matte or diffuse finish on the light entrance surface of the films, for increased effectiveness.
  • The light exit surface of the films has a pattern of discrete individual optical elements of well defined shape for refracting the incident light distribution such that the distribution of light exiting the films is in a direction more normal to the surface of the films. These individual optical elements may be formed by depressions in or projections on the exit surface of the films, and include one or more sloping surfaces for refracting the incident light toward a direction normal to the exit surface. These sloping surfaces may for example include a combination of planar and curved surfaces that redirect the light within a desired viewing angle. Also, the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements as well as the perimeter shapes of the curved and planar surfaces may be varied to tailor the light output distribution of the films, to customize the viewing angle of the display device used in conjunction with the films. In addition, the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to redirect more or less light that is traveling in a plane that would be parallel to the grooves of a prismatic or lenticular grooved film. Also the size and population of the individual optical elements, as well as the curvature of the surfaces of the individual optical elements may be chosen to produce a more or less diffuse output or to randomize the input light distribution from the light source to produce a softer more diffuse light output distribution while maintaining the output distribution within a specified angular region about the direction normal to the films.
  • The light entrance surface of the films may have an optical coating such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer. Also a matte or diffuse texture may be provided on the light entrance surface depending on the visual appearance desired. A matte finish produces a softer image but is not as bright.
  • The individual optical elements on the exit surface of the films may be randomized in such a way as to eliminate any interference with the pixel spacing of a liquid crystal display. This randomization can include the size, shape, position, depth, orientation, angle or density of the optical elements. This eliminates the need for diffuser layers to defeat moiré and similar effects. Also, at least some of the individual optical elements may be arranged in groupings across the exit surface of the films, with at least some of the optical elements in each of the groupings having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the groupings that varies across the films to obtain average characteristic values beyond machining tolerances for any single optical element and to defeat moiré and interference effects with the pixel spacing of a liquid crystal display. In addition, at least some of the individual optical elements may be oriented at different angles relative to each other for customizing the ability of the films to reorient/redirect light along two different axes.
  • The angles that the light redirecting surfaces of the individual optical elements make with the light exit surface of the films may also be varied across the display area of a liquid crystal display to tailor the light redirecting function of the films to a light input distribution that is non-uniform across the surface of the light source.
  • The individual optical elements of the light redirecting films also desirably overlap each other, in a staggered, interlocked and/or intersecting configuration, creating an optical structure with excellent surface area coverage. Moreover, the individual optical elements may be arranged in groupings with some of the individual optical elements oriented along one axis and other individual optical elements oriented along another axis. Also, the orientation of the individual optical elements in each grouping may vary. Further, the size, shape, position and/or orientation of the individual optical elements of the light redirecting films may vary to account for variations in the distribution of light emitted by a light source.
  • The properties and pattern of the optical elements of light redirecting films may also be customized to optimize the light redirecting films for different types of light sources which emit different light distributions, for example, one pattern for single bulb laptops, another pattern for double bulb flat panel displays, and so on.
  • Further, light redirecting film systems are provided in which the orientation, size, position and/or shape of the individual optical elements of the light redirecting films are tailored to the light output distribution of a backlight or other light source to reorient or redirect more of the incident light from the backlight within a desired viewing angle. Also, the backlight may include individual optical deformities that collimate light along one axis and the light redirecting films may include individual optical elements that collimate light along another axis perpendicular to the one axis.
  • To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter more fully described and particularly pointed out in the claims, the following description and annexed drawings setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but several of the various ways in which the principles of the invention may be employed.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the annexed drawings:
  • FIG. 1 is a schematic side elevation view of one form of light redirecting film system in accordance with the present invention;
  • FIG. 2 is an enlarged fragmentary side elevation view of a portion of the backlight and light redirecting film system of FIG. 1;
  • FIGS. 3 and 4 are schematic side elevation views of other forms of light redirecting film systems of the present invention;
  • FIGS. 5-20 are schematic perspective or plan views showing different patterns of individual optical elements on light redirecting films of the present invention;
  • FIGS. 5 a-5 n are schematic perspective views of different geometric shapes that the individual optical elements on the light redirecting films may take;
  • FIG. 21 is a schematic perspective view of a light redirecting film having optical grooves extending across the film in a curved pattern facing a corner of the film;
  • FIG. 22 is a top plan view of a light redirecting film having a pattern of optical grooves extending across the film facing a midpoint on one edge of the film that decreases in curvature as the distance from the one edge increases;
  • FIG. 23 is an end elevation view of the light redirecting film of FIG. 22 as seen from the left end thereof;
  • FIG. 24 is a side elevation view of the light redirecting film of FIG. 22;
  • FIGS. 25 and 26 are enlarged schematic fragmentary plan views of a surface area of a backlight/light emitting panel assembly showing various forms of optical deformities formed on or in a surface of the backlight;
  • FIGS. 27 and 28 are enlarged longitudinal sections through one of the optical deformities of FIGS. 25 and 26, respectively;
  • FIGS. 29 and 30 are enlarged schematic longitudinal sections through other forms of optical deformities formed on or in a surface of a backlight;
  • FIGS. 31-39 are enlarged schematic perspective views of backlight surface areas containing various patterns of individual optical deformities of other well defined shapes;
  • FIG. 40 is an enlarged schematic longitudinal section through another form of optical deformity formed on or in a surface of a backlight;
  • FIGS. 41 and 42 are enlarged schematic top plan views of backlight surface areas containing optical deformities similar in shape to those shown in FIGS. 37 and 38 arranged in a plurality of straight rows along the length and width of the surface areas;
  • FIGS. 43 and 44 are enlarged schematic top plan views of backlight surface areas containing optical deformities also similar in shape to those shown in FIGS. 37 and 38 arranged in staggered rows along the length of the surface areas;
  • FIGS. 45 and 46 are enlarged schematic top plan views of backlight surface areas containing a random or variable pattern of different sized optical deformities on the surface areas;
  • FIG. 47 is an enlarged schematic perspective view of a backlight surface area showing optical deformities increasing in size as the distance of the deformities from the light input surface increases or intensity of the light increases along the length of the surface area;
  • FIGS. 48 and 49 are schematic perspective views showing different angular orientations of the optical deformities along the length and width of a backlight surface area; and
  • FIGS. 50 and 51 are enlarged perspective views schematically showing how exemplary light rays emitted from a focused light source are reflected or refracted by different individual optical deformities of well defined shapes of a backlight surface area.
  • DETAILED DESCRIPTION OF THE INVENTION
  • FIGS. 1 and 2 schematically show one form of light redirecting film system 1 in accordance with this invention including a light redirecting film 2 that redistributes more of the light emitted by a backlight BL or other light source toward a direction more normal to the surface of the film. Film 2 may be used to redistribute light within a desired viewing angle from almost any light source for lighting, for example, a display such as a liquid crystal display, used in laptop computers, word processors, avionic displays, cell phones, PDAs and the like, to make the displays brighter. The liquid crystal display can be any type including a transmissive liquid crystal display D as schematically shown in FIGS. 1 and 2, a reflective liquid crystal display DI as schematically shown in FIG. 3 and a transflective liquid crystal display DII as schematically shown in FIG. 4.
  • The reflective liquid crystal display D′ shown in FIG. 3 includes a back reflector 42 adjacent the back side for reflecting ambient light entering the display back out the display to increase the brightness of the display. The light redirecting film 2 of the present invention is placed adjacent the top of the reflective liquid crystal display to redirect ambient light (or light from a front light) into the display toward a direction more normal to the plane of the film for reflection back out by the back reflector within a desired viewing angle to increase the brightness of the display. Light redirecting film 2 may be attached to, laminated to or otherwise held in place against the top of the liquid crystal display.
  • The transflective liquid crystal display DII shown in FIG. 4 includes a transreflector T placed between the display and a backlight BL for reflecting ambient light entering the front of the display back out the display to increase the brightness of the display in a lighted environment, and for transmitting light from the backlight through the transreflector and out the display to illuminate the display in a dark environment. In this embodiment the light redirecting film 2 may either be placed adjacent the top of the display or adjacent the bottom of the display or both as schematically shown in FIG. 4 for redirecting or redistributing ambient light and/or light from the backlight more normal to the plane of the film to make the light ray output distribution more acceptable to travel through the display to increase the brightness of the display.
  • Light redirecting film 2 comprises a thin transparent film or substrate 8 having a pattern of discrete individual optical elements 5 of well defined shape on the light exit surface 6 of the film for refracting the incident light distribution such that the distribution of the light exiting the film is in a direction more normal to the surface of the film.
  • Each of the individual optical elements 5 has a width and length many times smaller than the width and length of the film, and may be formed by depressions in or projections on the exit surface of the film. These individual optical elements 5 include at least one sloping surface for refracting the incident light toward the direction normal to the light exit surface. FIG. 5 shows one pattern of individual optical elements 5 on a film 2. These optical elements may take many different shapes. For example, FIG. 5 a shows one of the optical elements 5 of FIG. 5 which is a non-prismatic optical element having a total of two surfaces 10, 12, both of which are sloping. One of the surfaces 10 shown in FIG. 5 a is planar or flat whereas the other surface 12 is curved. Moreover, both surfaces 10, 12 intersect each other and also intersect the surface of the film. Alternatively, both surfaces 10′, 12′ of the individual optical elements 5′ may be curved as schematically shown in FIG. 5 b.
  • Alternatively, the optical elements may each have only one surface that is curved and sloping and intersects the film. FIG. 5 c shows one such optical element 5 II in the shape of a cone 13, whereas FIG. 5 d shows another such optical element 5 III having a semispherical or dome shape 14. Also, such optical elements may have more than one sloping surface intersecting the film.
  • FIG. 5 e shows an optical element 5 IV having a total of three surfaces, all of which intersect the film and intersect each other. Two of the surfaces 15 and 16 are curved, whereas the third surface 17 is planar.
  • FIG. 5 f shows an optical element 5 V in the shape of a pyramid 18 with four triangular shaped sides 19 that intersect each other and intersect the film. The sides 19 of the pyramid 18 may all be of the same size and shape as shown in FIG. 5 f, or the sides 19 I of the pyramid 18 I may be stretched so the sides of the optical element 5 VI have different perimeter shapes as shown in FIG. 5 g. Also, the optical elements may have any number of planar sloping sides. FIG. 5 h shows an optical element 5 VII with four planar sloping sides 20, whereas FIG. 5 i shows an optical element 5 VIII with eight planar sloping sides 20 I.
  • The individual optical elements may also have more than one curved and more than one planar sloping surface, all intersecting the film. FIG. 5 j shows an optical element 5 IX having a pair of intersecting oppositely sloping planar sides 22 and oppositely rounded or curved ends or sides 23. Further, the sloping planar sides 22 I and 22 II and curved ends or sides 23 I and 23 II of optical elements 5 X and 5 xi may have different angled slopes as shown in FIGS. 5 k and 5 l. Moreover, the optical elements may have at least one curved surface that does not intersect the film. One such optical element 5 XII is shown in FIG. 5 m which includes a pair of oppositely sloping planar sides 22 III and oppositely rounded or curved ends or sides 23 III and a rounded or curved top 24 intersecting the oppositely sloping sides and oppositely rounded ends. Further, the optical elements 5 XIII may be curved along their length as shown in FIG. 5 n.
  • Providing the individual optical elements with a combination of planar and curved surfaces redirects or redistributes a larger viewing area than is possible with a grooved film. Also, the curvature of the surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to tailor the light output distribution of the film to customize the viewing area of a display device used in conjunction with the film.
  • The light entrance surface 7 of the film 2 may have an optical coating 25 (see FIG. 2) such as an antireflective coating, a reflective polarizer, a retardation coating or a polarizer. Also, a matte or diffuse texture may be provided on the light entrance surface 7 depending on the visual appearance desired. A matte finish produces a softer image but is not as bright. The combination of planar and curved surfaces of the individual optical elements of the present invention may be configured to redirect some of the light rays impinging thereon in different directions to produce a softer image without the need for an additional diffuser or matte finish on the entrance surface of the film.
  • The individual optical elements of the light redirecting film also desirably overlap each other in a staggered, interlocked and/or intersecting configuration, creating an optical structure with excellent surface area coverage. FIGS. 6, 7, 13 and 15, for example, show optical elements 5 XIV, 5 XV, 5 XVI, and 5 XVII of light redirecting films 2 I, 2 II, 2 III and 2 IV staggered with respect to each other; FIGS. 8-10 show the optical elements 5 XVIII, 5 XIX and 5 XX of light redirecting films 2 V, 2 VI and 2 VII intersecting each other; and FIGS. 11 and 12 show the optical elements intersecting 5 XXI and 5 XXII of light redirecting films 2 VIII and 2 IX interlocking each other.
  • Moreover, the slope angle, density, position, orientation, height or depth, shape, and/or size of the optical elements of the light redirecting film may be matched or tuned to the particular light output distribution of a backlight BL or other light source to account for variations in the distribution of light emitted by the backlight in order to redistribute more of the light emitted by the backlight within a desired viewing angle. For example, the angle that the sloping surfaces (e.g., surfaces 10, 12) of the optical elements 5 make with the surface of the light redirecting film 2 may be varied as the distance from the backlight BL from a light source 26 increases to account for the way the backlight emits light rays R at different angles as the distance from the light source increases as schematically shown in FIG. 2. Also, the backlight BL itself may be designed to emit more of the light rays at lower angles to increase the amount of light emitted by the backlight and rely on the light redirecting film to redistribute more of the emitted light within a desired viewing angle. In this way the individual optical elements of the light redirecting film may be selected to work in conjunction with the optical deformations of the backlight to produce an optimized output light ray angle distribution from the system.
  • FIGS. 2, 5 and 9 show different patterns of individual optical elements all of the same height or depth, whereas FIGS. 7, 8, 10, 13 and 14 show different patterns of individual optical elements of different shapes, sizes and height or depth. The individual optical elements 5 XXIII of the light redirecting film 2 X of FIG. 14 are also shown arranged in alternating rows along the width or length of the film.
  • The individual optical elements 5 XXV and 5 XXVI may also be randomized on the film 2 XI and 2 XII as schematically shown in FIGS. 16 and 17 in such a way as to eliminate any interference with the pixel spacing of a liquid crystal display. This eliminates the need for optical diffuser layers 30 shown in FIGS. 1 and 2 to defeat moiré and similar effects. Moreover, at least some of the individual optical elements may be arranged in groupings 32, 32 I and 32 II across the film, with at least some of the optical elements in each grouping having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the groupings that varies across the film as schematically shown in FIGS. 7, 13 and 15 to obtain characteristic values beyond machining tolerances to defeat moiré and interference effects with the liquid crystal display pixel spacing. For example, at least some of the optical elements in each grouping may have a different depth or height that collectively produce an average depth or height characteristic for each grouping that varies across the film. Also, at least some of the optical elements in each grouping may have a different slope angle that collectively produce an average slope angle for each grouping that varies across the film. Further, at least one sloping surface of the individual optical elements in each grouping may have a different width or length that collectively produce an average width or length characteristic in each grouping that varies across the film.
  • Where the individual optical elements include a combination of planar and curved surfaces, for example planar and curved surfaces 10 II, 12 II, 10 III, 12 III and 10 IV, 12 IV as shown in FIGS. 7, 13 and 15, respectively, the curvature of the curved surfaces, or the ratio of the curved area to the planar area of the individual optical elements as well as the perimeter shapes of the curved and planar surfaces may be varied to tailor the light output distribution of the film. In addition, the curvature of the curved surfaces, or the ratio of the curved area to the planar area of the individual optical elements may be varied to redirect more or less light that is traveling in a plane that would be parallel to the grooves of a prismatic or lenticular grooved film, partially or completely replacing the need for a second layer of light redirecting film. Also, at least some of the individual optical elements may be oriented at different angles relative to each other as schematically shown in FIGS. 13 and 16 to redistribute more of the light emitted by a light source along two different axes in a direction more normal to the surface of the film, partially or completely replacing the need for a second layer of light redirecting film. However, it will be appreciated that two layers of such light redirecting film each having the same or different patterns of individual optical elements thereon may be placed between a light source and viewing area with the layers rotated 90 degrees (or other angles greater than 0 degrees and less than 90 degrees) with respect to each other so that the individual optical elements on the respective film layers redistribute more of the light emitted by a light source traveling in different planar directions in a direction more normal to the surface of the respective films.
  • Also, the light redirecting film 2 IV may have a pattern of optical elements 5 XVII that varies at different locations on the film as schematically shown in FIG. 15 to redistribute the light ray output distribution from different locations of a backlight or other light source to redistribute the light ray output distribution from the different locations toward a direction normal to the film.
  • Further, the properties and pattern of the optical elements of the light redirecting film may be customized to optimize the light redirecting film for different types of light sources which emit different light distributions, for example, one pattern for single bulb laptops, another pattern for double bulb flat panel displays, and so on.
  • FIG. 17 shows the optical elements 5 XXVI arranged in a radial pattern from the outside edges of the film 2 XII toward the center to redistribute the light ray output distribution of a backlight BL that receives light from cold cathode fluorescent lamp 26 I along all four side edges of the backlight.
  • FIG. 18 shows the optical elements 5 XXVII arranged in a pattern of angled groupings 32 III across the film 2 that are tailored to redistribute the light ray output distribution of a backlight BL that receives light from one cold cathode fluorescent lamp 26 I or a plurality of light emitting diodes 26 II along one input edge of the backlight.
  • FIG. 19 shows the optical elements 5 XXVIII arranged in a radial type pattern facing a corner of the film 2 XIV to redistribute the light ray output distribution of a backlight BL that is corner lit by a light emitting diode 26 II. FIG. 20 shows the optical elements 5 XXIX arranged in a radial type pattern facing a midpoint on one input edge of the film 2 XV to redistribute the light ray output distribution of a backlight BL that is lighted at a midpoint of one input edge of the backlight by a single light emitting diode 26 II.
  • FIG. 21 shows a light redirecting film 2 XVI having optical grooves 35 extending across the film in a curved pattern facing a corner of the film to redistribute the light ray output distribution of a backlight BL that is corner lit by a light emitting diode 26 II, whereas FIGS. 22-24 show a light redirecting film 2 XVII having a pattern of optical grooves 35 I extending across the film facing a midpoint along one edge of the film that decreases in curvature as the distance from the one edge increases to redistribute the light ray output distribution of a backlight BL that is edge lit by a light emitting diode 26 II at a midpoint of one input edge of the backlight.
  • Where the light redirecting film has a pattern 40 of optical elements 5 thereon that varies along the length of the film, a roll 41 of the film may be provided having a repeating pattern of optical elements thereon as schematically shown in FIG. 15 to permit a selected area of the pattern that best suits a particular application to be die cut from the roll of film.
  • The backlight BL may be substantially flat, or curved, or may be a single layer or multi-layers, and may have different thicknesses and shapes as desired. Moreover, the backlight may be flexible or rigid, and be made of a variety of compounds. Further, the backlight may be hollow, filled with liquid, air, or be solid, and may have holes or ridges.
  • Also, the light source 26 may be of any suitable type including, for example, an arc lamp, an incandescent bulb which may also be colored, filtered or painted, a lens end bulb, a line light, a halogen lamp, a light emitting diode (LED), a chip from an LED, a neon bulb, a cold cathode fluorescent lamp, a fiber optic light pipe transmitting from a remote source, a laser or laser diode, or any other suitable light source. Additionally, the light source 26 may be a multiple colored LED, or a combination of multiple colored radiation sources in order to provide a desired colored or white light output distribution. For example, a plurality of colored lights such as LEDs of different colors (e.g., red, blue, green) or a single LED with multiple color chips may be employed to create white light or any other colored light output distribution by varying the intensities of each individual colored light.
  • A pattern of optical deformities may be provided on one or both sides of the backlight BL or on one or more selected areas on one or both sides of the backlight as desired. As used herein, the term optical deformities means any change in the shape or geometry of a surface and/or coating or surface treatment that causes a portion of the light to be emitted from the backlight. These deformities can be produced in a variety of manners, for example, by providing a painted pattern, an etched pattern, machined pattern, a printed pattern, a hot stamp pattern, or a molded pattern or the like on selected areas of the backlight. An ink or print pattern may be applied for example by pad printing, silk printing, inkjet, heat transfer film process or the like. The deformities may also be printed on a sheet or film which is used to apply the deformities to the backlight. This sheet or film may become a permanent part of the backlight for example by attaching or otherwise positioning the sheet or film against one or both sides of the backlight in order to produce a desired effect.
  • By varying the density, opaqueness or translucence, shape, depth, color, area, index of refraction or type of deformities on or in an area or areas of the backlight, the light output of the backlight can be controlled. The deformities may be used to control the percent of light output from a light emitting area of the backlight. For example, less and/or smaller size deformities may be placed on surface areas where less light output is wanted. Conversely, a greater percentage of and/or larger deformities may be placed on surface areas of the backlight where greater light output is desired.
  • Varying the percentages and/or size of deformities in different areas of the backlight is necessary in order to provide a substantially uniform light output distribution. For example, the amount of light traveling through the backlight will ordinarily be greater in areas closer to the light source than in other areas further removed from the light source. A pattern of deformities may be used to adjust for the light variances within the backlight, for example, by providing a denser concentration of deformities with increased distance from the light source thereby resulting in a more uniform light output distribution from the backlight.
  • The deformities may also be used to control the output ray angle distribution from the backlight to suit a particular application. For example, if the backlight is used to backlight a liquid crystal display, the light output will be more efficient if the deformities (or a light redirecting film is used in combination with the backlight) direct the light rays emitted by the backlight at predetermined ray angles such that they will pass through the liquid crystal display with low loss. Additionally, the pattern of optical deformities may be used to adjust for light output variances attributed to light extractions of the backlight. The pattern of optical deformities may be printed on the backlight surface areas utilizing a wide spectrum of paints, inks, coatings, epoxies or the like, ranging from glossy to opaque or both, and may employ half-tone separation techniques to vary the deformity coverage. Moreover, the pattern of optical deformities may be multiple layers or vary in index of refraction.
  • Print patterns of optical deformities may vary in shapes such as dots, squares, diamonds, ellipses, stars, random shapes, and the like. Also, print patterns of sixty lines per inch or finer are desirably employed. This makes the deformities or shapes in the print patterns nearly invisible to the human eye in a particular application, thereby eliminating the detection of gradient or banding lines that are common to light extracting patterns utilizing larger elements. Additionally, the deformities may vary in shape and/or size along the length and/or width of the backlight. Also, a random placement pattern of the deformities may be utilized throughout the length and/or width of the backlight. The deformities may have shapes or a pattern with no specific angles to reduce moiré or other interference effects. Examples of methods to create these random patterns are printing a pattern of shapes using stochastic print pattern techniques, frequency modulated half tone patterns, or random dot half tones. Moreover, the deformities may be colored in order to effect color correction in the backlight. The color of the deformities may also vary throughout the backlight, for example, to provide different colors for the same or different light output areas.
  • In addition to or in lieu of the patterns of optical deformities, other optical deformities including prismatic or lenticular grooves or cross grooves, or depressions or raised surfaces of various shapes using more complex shapes in a mold pattern may be molded, etched, stamped, thermoformed, hot stamped or the like into or on one or more surface areas of the backlight. The prismatic or lenticular surfaces, depressions or raised surfaces will cause a portion of the light rays contacted thereby to be emitted from the backlight. Also, the angles of the prisms, depressions or other surfaces may be varied to direct the light in different directions to produce a desired light output distribution or effect. Moreover, the reflective or refractive surfaces may have shapes or a pattern with no specific angles to reduce moiré or other interference effects.
  • A back reflector 42 may be attached or positioned against one side of the backlight BL as schematically shown in FIGS. 1 and 2 in order to improve light output efficiency of the backlight by reflecting the light emitted from that side back through the backlight for emission through the opposite side. Additionally, a pattern of optical deformities 50 may be provided on one or both sides of the backlight as schematically shown in FIGS. 1 and 2 in order to change the path of the light so that the internal critical angle is exceeded and a portion of the light is emitted from one or both sides of the backlight.
  • FIGS. 25-28 show optical deformities 50 I, 50 II which may either be individual projections 51 on the respective backlight surface areas 52 or individual depressions 53 in such surface areas 52 I of a backlight BlI, BLII. In either case, each of these optical deformities has a well defined shape including a reflective or refractive surface 54, 54 I (hereafter sometimes collectively referred to as a reflective/refractive surface) that intersects the respective backlight surface area 52, 52 I at one edge 55, 55 I and has a uniform slope throughout its length for more precisely controlling the emission of light by each of the deformities. Along a peripheral edge portion 56, 56 I of each reflective/ refractive surface 54, 54 I is an end wall 57, 57 I of each deformity that intersects the respective panel surface area 52, 52 I at a greater included angle I, II than the included angle III, IIII between the reflective/ refractive surfaces 54, 54 I and the panel surface area 52, 52 I (see FIGS. 27 and 28) to minimize the projected surface area of the end walls on the panel surface area. This allows more deformities to be placed on or in the panel surface areas than would otherwise be possible if the projected surface areas of the end walls 57, 57 I were substantially the same as or greater than the projected surface areas of the reflective/ refractive surfaces 54, 54 I.
  • In FIGS. 25 and 26 the peripheral edge portions 56, 56 I of the reflective/ refractive surfaces 54, 54 I and associated end walls 57, 57 I are curved in the transverse direction. Also in FIGS. 27 and 28 the end walls 57, 57 I of the deformities are shown extending substantially perpendicular to the reflective/ refractive surfaces 54, 54 I of the deformities. Alternatively, such end walls may extend substantially perpendicular to the panel surface areas 52, 52 I as schematically shown in FIGS. 29 and 30. This virtually eliminates any projected surface area of the end walls on the panel surface areas whereby the density of the deformities on the panel surface areas may be even further increased.
  • The optical deformities may also be of other well defined shapes to obtain a desired light output distribution from a panel surface area. FIG. 31 shows individual light extracting deformities 58 on a panel surface area 52 III each including a generally planar, rectangular reflective/refractive surface 59 and associated end wall 60 of a uniform slope throughout their length and width and generally planar side walls 61. Alternatively, the deformities 58 I may have rounded or curved side walls 62 on a panel surface area 52 IV as schematically shown in FIG. 32.
  • FIG. 33 shows individual light extracting deformities 63 on a panel surface area 52 V each including a planar, sloping triangular shaped reflective/refractive surface 64 and associated planar, generally triangularly shaped side walls or end walls 65. FIG. 34 shows individual light extracting deformities 66 on a panel surface area 52 VI each including a planar sloping reflective/refractive surface 67 having angled peripheral edge portions 68 and associated angled end and side walls 69 and 70.
  • FIG. 35 shows individual light extracting deformities 71 on a panel surface area 52 VII which are generally conically shaped, whereas FIG. 36 shows individual light extracting deformities 72 on a panel surface area 52 VIII each including a rounded reflective/refractive surface 73 and rounded end walls 74 and rounded or curved side walls 75 all blended together. These additional surfaces will reflect or refract other light rays impinging thereon in different directions to spread light across the backlight/panel member BL to provide a more uniform distribution of light emitted from the panel member.
  • Regardless of the particular shape of the reflective/refractive surfaces and end and side walls of the individual deformities, such deformities may also include planar surfaces intersecting the reflective/refractive surfaces and end and/or side walls in parallel spaced relation to the panel surface areas 52. FIGS. 37-39 show deformities 76, 77 and 78 in the form of individual projections on a panel surface area 52 IX, 52 X, 52 XI having representative shapes similar to those shown in FIGS. 31, 32 and 35, respectively, except that each deformity is intersected by a planar surface 79, 79 I, 79 II in parallel spaced relation to the panel surface area. In like manner, FIG. 40 shows one of a multitude of deformities 80 in the form of individual depressions 81 in a panel surface area 52 XII each intersected by a planar surface 79 III in parallel spaced relation to the general planar surface of the panel surface area. Any light rays that impinge on such planar surfaces at internal angles less than the critical angle for emission of light from the panel surface area will be internally reflected by the planar surfaces, whereas any light rays impinging on such planar surfaces at internal angles greater than the critical angle will be emitted by the planar surfaces with minimal optical discontinuities, as schematically shown in FIG. 40.
  • Where the deformities are projections on the panel surface area, the reflective/refractive surfaces extend at an angle away from the panel in a direction generally opposite to that in which the light rays from the light source 26 travel through the panel as schematically shown in FIGS. 27 and 29. Where the deformities are depressions in the panel surface area, the reflective/refractive surfaces extend at an angle into the panel in the same general direction in which the light rays from the light source 26 travel through the panel member as schematically shown in FIGS. 28 and 30.
  • Regardless of whether the deformities are projections or depressions on or in the panel surface areas, the slopes of the light reflective/refractive surfaces of the deformities may be varied to cause the light rays impinging thereon to be either refracted out of the light emitting panel or reflected back through the panel and emitted out the opposite side of the panel which may be etched to diffuse the light emitted therefrom or covered by a light redirecting film to produce a desired effect. Also, the pattern of optical deformities on the panel surface area may be uniform or variable as desired to obtain a desired light output distribution from the panel surface areas. FIGS. 41 and 42 show deformities 76 I and 77 I similar in shape to those shown in FIGS. 37 and 38 arranged in a plurality of generally straight uniformly spaced apart rows along the length and width of a panel surface area 52 XIII, 52 XIV, whereas FIGS. 43 and 44 show such deformities 76 II and 77 II arranged in staggered rows that overlap each other along the length of a panel surface area 52 XV, 52 XVI.
  • Also, the size, including the width, length and depth or height as well as the angular orientation and position of the optical deformities may vary along the length and/or width of any given panel surface area to obtain a desired light output distribution from the panel surface area. FIGS. 45 and 46 show a random or variable pattern of different size deformities 58 II, 58 III similar in shape to those shown in FIGS. 31 and 32, respectively, arranged in staggered rows on a panel surface area 52 XVII, 52 XVIII, whereas FIG. 47 shows deformities 77 III similar in shape to those shown in FIG. 38 increasing in size as the distance of the deformities from the light source increases or intensity of the light decreases along the length and/or width of the panel surface area 52 XIX. The deformities are shown in FIGS. 45 and 46 arranged in clusters 82, 82 I across the panel surface, with at least some of the deformities in each cluster having a different size or shape characteristic that collectively produce an average size or shape characteristic for each of the clusters that varies across the panel surface. For example, at least some of the deformities in each of the clusters may have a different depth or height or different slope or orientation that collectively produce an average depth or height characteristic or average slope or orientation of the sloping surface that varies across the panel surface. Likewise at least some of the deformities in each of the clusters may have a different width or length that collectively produce an average width or length characteristic that varies across the panel surface. This allows one to obtain a desired size or shape characteristic beyond machinery tolerances, and also defeats moiré and interference effects.
  • FIGS. 48 and 49 schematically show different angular orientations of optical deformities 85, 85 I of any desired shape along the length and width of a panel surface area 52 XX, 52 XXI of a light emitting panel assembly backlight. In FIG. 48 the deformities are arranged in straight rows 86 along the length of the panel surface area but the deformities in each of the rows are oriented to face the light source 26 so that all of the deformities are substantially in line with the light rays being emitted from the light source. In FIG. 49 the deformities 85 I are also oriented to face the light source 26 similar to FIG. 48. In addition, the rows 87 of deformities in FIG. 49 are in substantial radial alignment with the light source 26.
  • FIGS. 50 and 51 schematically show how exemplary light rays 90, 90 I emitted from a focused light source 26 insert molded or cast within a light transition area 91, 91 I of a light emitting panel assembly backlight BLIII, BLIV in accordance with this invention are reflected during their travel through the light emitting panel member 92, 92 I until they impinge upon individual light extracting deformities 50 III, 77 IV of well defined shapes on or in a panel surface area 52 XXII, 52 XXIII causing more of the light rays to be reflected or refracted out of one side 93, 93 I of the panel member than the other side 94, 94 I. In FIG. 50 the exemplary light rays 90 are shown being reflected by the reflective/refractive surfaces 54 III of the deformities 50 III in the same general direction out through the same side 93 of the panel member, whereas in FIG. 51 the light rays 90 I are shown being scattered in different directions within the panel member 92 I by the rounded side walls 62 I of the deformities 77 IV before the light rays are reflected/refracted out of the same side 93 I of the panel member. Such a pattern of individual light extracting deformities of well defined shapes in accordance with the present invention can cause 60 to 70% or more of the light received through the input edge 95 I of the panel member to be emitted from the same side of the panel member.
  • From the foregoing, it will be apparent that the light redirecting films of the present invention redistribute more of the light emitted by a backlight or other light source toward a direction more normal to the plane of the films. Also, the light redirecting films and backlights of the present invention may be tailored or tuned to each other to provide a system in which the individual optical elements of the light redirecting films work in conjunction with the optical deformities of the backlights to produce an optimized output light ray angle distribution from the system.
  • Although the invention has been shown and described with respect to certain embodiments, it is obvious that equivalent alterations and modifications will occur to others skilled in the art upon the reading and understanding of the specification. In particular, with regard to the various functions performed by the above described components, the terms (including any reference to a “means”) used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed component which performs the function in the herein illustrated exemplary embodiments of the invention. In addition, while a particular feature of the invention may have been disclosed with respect to only one embodiment, such feature may be combined with one or more other features of other embodiments as may be desired and advantageous for any given or particular application.

Claims (30)

1. A light emitting panel assembly comprising:
a generally planar optical conductor having at least one light input edge generally located at or near a corner; and
at least one light source configured to generate light having an output distribution defined by a greater width component than height component, said at least one light source having a total length that is quite small in relation to a length and a width of the optical conductor, said at least one light source being positioned adjacent to the input edge, thereby directing light into the optical conductor;
said optical conductor having at least one output region and a predetermined pattern of deformities configured to cause light to be emitted from said at least one output region.
2. The light emitting panel assembly of claim 1, wherein said optical conductor is generally rectangular.
3. The light emitting panel assembly of claim 1, wherein said at least one light source is a light emitting diode.
4. The light emitting panel assembly of claim 1, wherein said optical conductor additionally comprises a transition region disposed between said at least one light source and said at least one output region that is configured to spread and transmit the light from said at least one light source.
5. The light emitting panel assembly of claim 1, wherein at least some of the deformities are grooves, depressions or projections arranged in radial patterns that extend across the optical conductor with radii of curvature of the radial patterns increasing as distance away from the at least one light source increases.
6. The light emitting panel assembly of claim 1, wherein the deformities have a well defined shape.
7. The light emitting panel assembly of claim 6, wherein the deformities are quite small in relation to a length and a width of the optical conductor.
8. The light emitting panel assembly of claim 7, wherein at least some of the deformities are generally arranged in radial patterns with radii of curvature of the radial patterns increasing as distance away from the at least one light source increases.
9. The light emitting panel assembly of claim 7, wherein each of at least some of the deformities has at least a first surface and a second surface, the first surface and the second surface coming together to form a ridge, the ridge generally being curved towards the at least one light source, the first surface being generally closer to the at least one light source than the second surface, and the first surface having a larger surface area than the second surface.
10. The light emitting panel assembly of claim 7, wherein at least some of the deformities intersect other deformities.
11. The light emitting panel assembly of claim 1, wherein said optical conductor has oppositely facing major surfaces, and deformities on or in both of said major surfaces.
12. The light emitting panel assembly of claim 1, wherein at least some of the deformities are arranged in a generally radial pattern facing the at least one light source.
13. The light emitting panel assembly of claim 1, wherein the at least one light source is positioned at an oblique angle relative to a side edge of the optical conductor.
14. The light emitting panel assembly of claim 1, wherein the density of the deformities increases as distance away from the at least one light source increases.
15. The light emitting assembly of claim 1, wherein at least some of said deformities have at least one surface that is angled towards said at least one light source.
16. A light emitting panel assembly comprising:
a generally planar optical conductor having at least one light input edge located on a side of the optical conductor; and
at least one light source configured to generate light having an output distribution defined by a greater width component than height component, said at least one light source having a total length that is quite small in relation to a length and a width of the optical conductor, said at least one light source being positioned adjacent to the input edge, thereby directing light into the optical conductor;
said optical conductor having at least one output region and a predetermined pattern of deformities configured to cause light to be emitted from said at least one output region.
17. The light emitting panel assembly of claim 16, wherein said optical conductor is generally rectangular.
18. The light emitting panel assembly of claim 16, wherein said at least one light source is a light emitting diode.
19. The light emitting panel assembly of claim 16, wherein said optical conductor additionally comprises a transition region disposed between said at least one light source and said at least one output region that is configured to spread and transmit the light from said at least one light source.
20. The light emitting panel assembly of claim 16, wherein at least some of the deformities are grooves, depressions, or projections arranged in radial patterns that extend across the optical conductor with radii of curvature of the radial patterns increasing as distance away from the at least one light source increases.
21. The light emitting panel assembly of claim 16, wherein the deformities have a well defined shape.
22. The light emitting panel assembly of claim 21, wherein the deformities are quite small in relation to a length and a width of the optical conductor.
23. The light emitting panel assembly of claim 22, wherein at least some of the deformities are generally arranged in radial patterns with radii of curvature of the radial patterns increasing as distance away from the at least one light source increases.
24. The light emitting panel assembly of claim 22, wherein each of at least some of the deformities has at least a first surface and a second surface, the first surface and the second surface coming together to form a ridge, the ridge generally being curved towards the at least one light source, the first surface being generally closer to the at least one light source than the second surface, and the first surface having a larger surface area than the second surface.
25. The light emitting panel assembly of claim 22, wherein at least some of the deformities intersect other deformities.
26. The light emitting panel assembly of claim 16, wherein said optical conductor has oppositely facing major surfaces, and deformities on or in both of said major surfaces.
27. The light emitting panel assembly of claim 16, wherein at least some of the deformities are arranged in a generally radial pattern facing the at least one light source.
28. The light emitting panel assembly of claim 16, wherein the at least one light source is positioned at an oblique angle relative to a side edge of the optical conductor.
29. The light emitting panel assembly of claim 16, wherein the density of the deformities increases as distance away from the at least one light source increases.
30. The light emitting assembly of claim 16, wherein at least some of said deformities have at least one surface that is angled towards said at least one light source.
US12/250,922 1999-02-23 2008-10-14 Light redirecting films and film systems Abandoned US20090034293A1 (en)

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US12/250,922 US20090034293A1 (en) 1999-02-23 2008-10-14 Light redirecting films and film systems
US12/946,077 US20110058390A1 (en) 1999-02-23 2010-11-15 Light redirecting films and film systems

Applications Claiming Priority (6)

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US09/256,275 US6712481B2 (en) 1995-06-27 1999-02-23 Light emitting panel assemblies
US09/909,318 US6752505B2 (en) 1999-02-23 2001-07-19 Light redirecting films and film systems
US10/729,113 US7090389B2 (en) 1999-02-23 2003-12-05 Method of selecting a light redirecting film
US11/484,063 US7364342B2 (en) 1999-02-23 2006-07-11 Light redirecting films pattern of variable optical elements
US12/054,680 US7914196B2 (en) 1999-02-23 2008-03-25 Light redirecting film systems having pattern of variable optical elements
US12/250,922 US20090034293A1 (en) 1999-02-23 2008-10-14 Light redirecting films and film systems

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US12/054,680 Continuation US7914196B2 (en) 1999-02-23 2008-03-25 Light redirecting film systems having pattern of variable optical elements

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US12/946,077 Continuation US20110058390A1 (en) 1999-02-23 2010-11-15 Light redirecting films and film systems

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US20090034293A1 true US20090034293A1 (en) 2009-02-05

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US09/909,318 Expired - Fee Related US6752505B2 (en) 1999-02-23 2001-07-19 Light redirecting films and film systems
US10/729,113 Expired - Lifetime US7090389B2 (en) 1999-02-23 2003-12-05 Method of selecting a light redirecting film
US11/484,063 Expired - Fee Related US7364342B2 (en) 1999-02-23 2006-07-11 Light redirecting films pattern of variable optical elements
US12/054,680 Expired - Fee Related US7914196B2 (en) 1999-02-23 2008-03-25 Light redirecting film systems having pattern of variable optical elements
US12/250,922 Abandoned US20090034293A1 (en) 1999-02-23 2008-10-14 Light redirecting films and film systems
US12/364,637 Expired - Fee Related US7810982B2 (en) 1999-02-23 2009-02-03 Edge-lit optical system having optical elements on two surfaces
US12/364,554 Expired - Fee Related US8092068B2 (en) 1999-02-23 2009-02-03 Light redirecting films and film systems
US12/946,077 Abandoned US20110058390A1 (en) 1999-02-23 2010-11-15 Light redirecting films and film systems
US13/030,881 Abandoned US20110134362A1 (en) 1999-02-23 2011-02-18 Light redirecting films and film systems
US13/313,190 Expired - Fee Related US8322905B2 (en) 1999-02-23 2011-12-07 Edgelit panel with curvilinear light extracting deformities
US13/893,886 Expired - Fee Related US8845176B2 (en) 1999-02-23 2013-05-14 Light redirecting films with non-prismatic optical elements

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US09/909,318 Expired - Fee Related US6752505B2 (en) 1999-02-23 2001-07-19 Light redirecting films and film systems
US10/729,113 Expired - Lifetime US7090389B2 (en) 1999-02-23 2003-12-05 Method of selecting a light redirecting film
US11/484,063 Expired - Fee Related US7364342B2 (en) 1999-02-23 2006-07-11 Light redirecting films pattern of variable optical elements
US12/054,680 Expired - Fee Related US7914196B2 (en) 1999-02-23 2008-03-25 Light redirecting film systems having pattern of variable optical elements

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US12/364,637 Expired - Fee Related US7810982B2 (en) 1999-02-23 2009-02-03 Edge-lit optical system having optical elements on two surfaces
US12/364,554 Expired - Fee Related US8092068B2 (en) 1999-02-23 2009-02-03 Light redirecting films and film systems
US12/946,077 Abandoned US20110058390A1 (en) 1999-02-23 2010-11-15 Light redirecting films and film systems
US13/030,881 Abandoned US20110134362A1 (en) 1999-02-23 2011-02-18 Light redirecting films and film systems
US13/313,190 Expired - Fee Related US8322905B2 (en) 1999-02-23 2011-12-07 Edgelit panel with curvilinear light extracting deformities
US13/893,886 Expired - Fee Related US8845176B2 (en) 1999-02-23 2013-05-14 Light redirecting films with non-prismatic optical elements

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US (11) US6752505B2 (en)
EP (2) EP1415110B1 (en)
JP (1) JP4349902B2 (en)
KR (3) KR100918141B1 (en)
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TW (3) TWI291580B (en)
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120170315A1 (en) * 2010-12-31 2012-07-05 Au Optronics Corporation Three-Dimensional Display Apparatus and Backlight Module Thereof
US20120274874A1 (en) * 2011-04-29 2012-11-01 Shenzhen China Star Optoelectronics Technology Co. Ltd. Backlight Module and Liquid Crystal Display Device
WO2012154342A2 (en) * 2011-05-06 2012-11-15 Rambus Inc. Lighting assembly
US9134008B2 (en) 2010-10-06 2015-09-15 Shoot The Moon Products Ii, Llc Light emitting decorative panels
US9200781B2 (en) * 2010-10-06 2015-12-01 Shoot The Moon Products Ii, Llc Light emitting decorative panels
US10900657B2 (en) 2017-08-01 2021-01-26 Technical Consumer Products, Inc. Edge-lit light fixture having capabilities for a secondary service

Families Citing this family (441)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7108414B2 (en) 1995-06-27 2006-09-19 Solid State Opto Limited Light emitting panel assemblies
US7364341B2 (en) * 1999-02-23 2008-04-29 Solid State Opto Limited Light redirecting films including non-interlockable optical elements
US6827456B2 (en) * 1999-02-23 2004-12-07 Solid State Opto Limited Transreflectors, transreflector systems and displays and methods of making transreflectors
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
US20050024849A1 (en) * 1999-02-23 2005-02-03 Parker Jeffery R. Methods of cutting or forming cavities in a substrate for use in making optical films, components or wave guides
CN101444496B (en) * 2001-06-12 2011-04-13 维尔斯达医疗公司 Compounds for the treatment of metabolic disorders
KR100799156B1 (en) * 2001-07-13 2008-01-29 삼성전자주식회사 Light guided panel and method for fabricating thereof and liquid crystal display device using the same
TWI258023B (en) * 2001-11-07 2006-07-11 Ibm A prism sheet, a back-light unit using said prism sheet, and a transmission type liquid crystal display device
AU2002359472A1 (en) * 2001-12-05 2003-06-23 Solid State Opto Limited Transreflectors, transreflector systems and displays and methods of making transreflectors
DE10201029A1 (en) * 2002-01-11 2003-07-24 Siemens Ag display device
GB0202169D0 (en) * 2002-01-30 2002-03-20 Innavisions Ltd Improvements in or relating to optical data recognition
KR20040102166A (en) * 2002-04-24 2004-12-03 닛토덴코 가부시키가이샤 Light converging system and transmission liquid crystal display
JP2004296215A (en) * 2003-03-26 2004-10-21 Toyota Industries Corp Transparent substrate for planar light source, manufacturing method of transparent substrate, planar light source, and liquid crystal display device
JP4019886B2 (en) * 2002-09-30 2007-12-12 オムロン株式会社 Optical film, surface light source device and liquid crystal display device
US7671859B2 (en) * 2002-11-06 2010-03-02 Continental Automotive Systems Us, Inc. Thin instrument cluster with anti-reflective coating
EP1420462A1 (en) * 2002-11-13 2004-05-19 Heptagon Oy Light emitting device
JP4436105B2 (en) * 2002-11-29 2010-03-24 富士通株式会社 Reflector, illumination device, light guide plate, and display device
US7125131B2 (en) * 2002-12-06 2006-10-24 General Electric Company Brightness enhancement film with improved view angle
TWI275842B (en) * 2002-12-20 2007-03-11 Hon Hai Prec Ind Co Ltd Light guide plate and method of making the same
US7417782B2 (en) 2005-02-23 2008-08-26 Pixtronix, Incorporated Methods and apparatus for spatial light modulation
US20060215074A1 (en) * 2003-03-06 2006-09-28 Jak Martin J J Collimated scanning backlight device
KR100584554B1 (en) * 2003-03-25 2006-05-30 삼성전자주식회사 Projection display
US20050052871A1 (en) * 2003-07-11 2005-03-10 Hon Hai Precision Industry Co., Ltd. Light-emitting diode and backlight system using the same
US20050130759A1 (en) * 2003-12-12 2005-06-16 Hayden Mark X. Sports shaft with variable contour
KR100971392B1 (en) * 2003-12-24 2010-07-21 엘지디스플레이 주식회사 Liquid crystal display device
KR100955173B1 (en) * 2004-03-03 2010-04-29 키모토 컴파니 리미티드 Light control film and backlight device using it
US7255462B2 (en) * 2004-03-04 2007-08-14 K-Bridge Electronics Co., Ltd. Dimmer device for backlight module
TWM255146U (en) * 2004-04-22 2005-01-11 Shih-Chieh Tang Brightness enhancement film having curved prism units
US7286280B2 (en) * 2004-05-07 2007-10-23 The University Of British Columbia Brightness enhancement film for backlit image displays
US7160017B2 (en) * 2004-06-03 2007-01-09 Eastman Kodak Company Brightness enhancement film using a linear arrangement of light concentrators
US20050269742A1 (en) * 2004-06-03 2005-12-08 Wright Thomas S Method for making tools for micro replication
US7622367B1 (en) 2004-06-04 2009-11-24 The Board Of Trustees Of The University Of Illinois Methods and devices for fabricating and assembling printable semiconductor elements
US7236303B2 (en) 2004-06-15 2007-06-26 Eastman Kodak Company Thermoplastic optical feature with high apex sharpness
US20050276949A1 (en) * 2004-06-15 2005-12-15 Eastman Kodak Company Optical film and method of manufacture
US20050275132A1 (en) * 2004-06-15 2005-12-15 Eastman Kodak Company Belt over compliant roller used with molding roller
KR20060015174A (en) * 2004-08-13 2006-02-16 삼성전자주식회사 A prism sheet and a liquid crystal display provided with the same
KR101085444B1 (en) * 2004-06-25 2011-11-21 삼성전자주식회사 Optical member and back light assembly having the light guide plate, and display device having the back light assembly
TWI300494B (en) * 2004-07-23 2008-09-01 Hon Hai Prec Ind Co Ltd Light guiding plate and backlight module using the same
KR20060018146A (en) * 2004-08-23 2006-02-28 엘지전자 주식회사 Prism sheet of liquid crystal display and back light unit using the prism sheet thereof
US7212345B2 (en) * 2004-09-13 2007-05-01 Eastman Kodak Company Randomized patterns of individual optical elements
JP2006086075A (en) * 2004-09-17 2006-03-30 Alps Electric Co Ltd Surface-emitting device, back surface-lighting system and liquid crystal display
US7466484B2 (en) * 2004-09-23 2008-12-16 Rohm And Haas Denmark Finance A/S Wire grid polarizers and optical elements containing them
TWI249257B (en) 2004-09-24 2006-02-11 Epistar Corp Illumination apparatus
US7775700B2 (en) * 2004-10-01 2010-08-17 Rohm And Haas Electronics Materials Llc Turning film using array of roof prism structures
JP2006113271A (en) * 2004-10-14 2006-04-27 Toppan Printing Co Ltd Back light unit for liquid crystal display device
US20060083004A1 (en) * 2004-10-15 2006-04-20 Eastman Kodak Company Flat-panel area illumination system
JP2006148036A (en) * 2004-10-19 2006-06-08 Omron Corp Light emitting source and light emitting source array
KR101082904B1 (en) * 2004-10-25 2011-11-11 삼성전자주식회사 Light guide panel, and back light assembly and display device having the same
CN101151582B (en) * 2004-11-04 2010-12-15 上海向隆电子科技有限公司 Long curved wedges in an optical film
US20060103777A1 (en) * 2004-11-15 2006-05-18 3M Innovative Properties Company Optical film having a structured surface with rectangular based prisms
EP1666936A1 (en) 2004-12-02 2006-06-07 Asulab S.A. Dual illumination function optical device and figurative image formation
EP1666933A1 (en) 2004-12-02 2006-06-07 Asulab S.A. Dual illumination function optical device and figurative image formation
US7416309B2 (en) * 2004-12-30 2008-08-26 3M Innovative Properties Company Optical film having a surface with rounded structures
US7320538B2 (en) * 2004-12-30 2008-01-22 3M Innovative Properties Company Optical film having a structured surface with concave pyramid-shaped structures
US7220026B2 (en) * 2004-12-30 2007-05-22 3M Innovative Properties Company Optical film having a structured surface with offset prismatic structures
CN1808234A (en) * 2005-01-20 2006-07-26 鸿富锦精密工业(深圳)有限公司 Light guide plate
GB0502453D0 (en) 2005-02-05 2005-03-16 Cambridge Flat Projection Flat panel lens
US7999994B2 (en) 2005-02-23 2011-08-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US7755582B2 (en) 2005-02-23 2010-07-13 Pixtronix, Incorporated Display methods and apparatus
US9082353B2 (en) 2010-01-05 2015-07-14 Pixtronix, Inc. Circuits for controlling display apparatus
US9158106B2 (en) 2005-02-23 2015-10-13 Pixtronix, Inc. Display methods and apparatus
US7742016B2 (en) 2005-02-23 2010-06-22 Pixtronix, Incorporated Display methods and apparatus
US8519945B2 (en) 2006-01-06 2013-08-27 Pixtronix, Inc. Circuits for controlling display apparatus
US7746529B2 (en) 2005-02-23 2010-06-29 Pixtronix, Inc. MEMS display apparatus
US8482496B2 (en) 2006-01-06 2013-07-09 Pixtronix, Inc. Circuits for controlling MEMS display apparatus on a transparent substrate
US8159428B2 (en) 2005-02-23 2012-04-17 Pixtronix, Inc. Display methods and apparatus
US20070205969A1 (en) 2005-02-23 2007-09-06 Pixtronix, Incorporated Direct-view MEMS display devices and methods for generating images thereon
US8310442B2 (en) 2005-02-23 2012-11-13 Pixtronix, Inc. Circuits for controlling display apparatus
US9261694B2 (en) 2005-02-23 2016-02-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US7675665B2 (en) 2005-02-23 2010-03-09 Pixtronix, Incorporated Methods and apparatus for actuating displays
US9229222B2 (en) 2005-02-23 2016-01-05 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
EP1877696A1 (en) * 2005-03-12 2008-01-16 3M Innovative Properties Company Illumination device and methods for making the same
TW200638075A (en) * 2005-04-22 2006-11-01 Hon Hai Prec Ind Co Ltd Light guide plate and backlight module using the same
TWM276217U (en) * 2005-04-22 2005-09-21 Innolux Display Corp Backlight module and liquid crystal display
US20060250707A1 (en) * 2005-05-05 2006-11-09 3M Innovative Properties Company Optical film having a surface with rounded pyramidal structures
US8596824B2 (en) 2005-05-24 2013-12-03 Syncrolite, L.P. Method and apparatus for a scrollable modifier for a light fixture
US20060268558A1 (en) * 2005-05-24 2006-11-30 Synchrolite, L.P. Method and apparatus for controlling diffusion and color of a light beam
KR100728368B1 (en) * 2005-05-25 2007-06-14 엘지전자 주식회사 Liquid Crystal Display Backlight Unit Include Cone Structure Type Bright Enhancement Film And Manufacture Method of Above Bright Enhancement Film
KR100682875B1 (en) * 2005-06-08 2007-02-15 삼성전기주식회사 Light guide plate having multi-period patterns and illumination apparatus using the diffuser sheet
US9366875B2 (en) * 2005-06-09 2016-06-14 Ubright Optronics Corporation Light directing film
JP2008544303A (en) * 2005-06-09 2008-12-04 ユーブライト オプトロニクス コーポレイション Moire reduction optical substrate having irregular prism structure
US8641259B2 (en) * 2006-06-09 2014-02-04 Ubright Optronics Corporation Luminance enhancement optical substrates with anti-interference-fringe structures
JP4457979B2 (en) 2005-06-13 2010-04-28 セイコーエプソン株式会社 Backlight unit manufacturing method, backlight unit, electro-optical device, and electronic apparatus
DE102005027737B4 (en) * 2005-06-16 2013-03-28 Saint-Gobain Glass Deutschland Gmbh Use of a transparent disc with a three-dimensional surface structure as a cover plate for components for the use of sunlight
TWI274896B (en) * 2005-06-30 2007-03-01 Efun Technology Co Ltd Brightness enhancement film having reinforcing layer
JP4329736B2 (en) * 2005-07-04 2009-09-09 セイコーエプソン株式会社 Optical substrate, planar illumination device, electro-optical device
US20070014020A1 (en) * 2005-07-13 2007-01-18 Eastman Kodak Company Low birefringent light redirecting film
US20070024994A1 (en) * 2005-07-29 2007-02-01 3M Innovative Properties Company Structured optical film with interspersed pyramidal structures
US7695180B2 (en) * 2005-08-27 2010-04-13 3M Innovative Properties Company Illumination assembly and system
US20070047228A1 (en) * 2005-08-27 2007-03-01 3M Innovative Properties Company Methods of forming direct-lit backlights having light recycling cavity with concave transflector
US7537374B2 (en) * 2005-08-27 2009-05-26 3M Innovative Properties Company Edge-lit backlight having light recycling cavity with concave transflector
US7815355B2 (en) * 2005-08-27 2010-10-19 3M Innovative Properties Company Direct-lit backlight having light recycling cavity with concave transflector
TWI391711B (en) * 2005-09-13 2013-04-01 Efun Technology Co Ltd Brightness enhancement film having a light-guiding layer
US20070058391A1 (en) * 2005-09-14 2007-03-15 Wilson Randall H Light extraction layer
US7663712B2 (en) * 2005-10-10 2010-02-16 Skc Haas Display Films Co., Ltd. Backlight unit with linearly reduced divergence having the width of an output aperture vary over the length of a light divergence reduction structure
US20070103910A1 (en) * 2005-11-08 2007-05-10 Eastman Kodak Company Light redirecting films having multiple layers and an adhesion layer
US7459899B2 (en) * 2005-11-21 2008-12-02 Thermo Fisher Scientific Inc. Inductively-coupled RF power source
TWI339743B (en) * 2005-12-06 2011-04-01 Ubright Optronics Corp A luminance enhancement film and manufacturing method thereof and method for enhancing brightness of an image
TW200725076A (en) * 2005-12-29 2007-07-01 Speed Tech Corp Method of adjusting diffusing and condensing light ability of optical element
US20070159845A1 (en) * 2006-01-12 2007-07-12 Omron Corporation Surface light source device and apparatus using the same
US7866871B2 (en) * 2006-01-13 2011-01-11 Avery Dennison Corporation Light enhancing structures with a plurality of arrays of elongate features
US7674028B2 (en) * 2006-01-13 2010-03-09 Avery Dennison Corporation Light enhancing structures with multiple arrays of elongate features of varying characteristics
US20070086207A1 (en) * 2006-01-13 2007-04-19 Optical Research Associates Display systems including light enhancing structures with arrays of elongate features
CN101000387A (en) * 2006-01-14 2007-07-18 鸿富锦精密工业(深圳)有限公司 Prism and backlight module using the prism
CN101025516A (en) * 2006-02-23 2007-08-29 鸿富锦精密工业(深圳)有限公司 Backlight module
US8526096B2 (en) 2006-02-23 2013-09-03 Pixtronix, Inc. Mechanical light modulators with stressed beams
CN100468089C (en) * 2006-03-03 2009-03-11 鸿富锦精密工业(深圳)有限公司 Prism lens and back-light molding set therewith
KR101234098B1 (en) * 2006-03-21 2013-02-19 삼성디스플레이 주식회사 Optical sheet, backlight assembly and display device having the same
US20070223252A1 (en) * 2006-03-24 2007-09-27 Junwon Lee Illumination apparatus and film
CN100498389C (en) * 2006-03-25 2009-06-10 鸿富锦精密工业(深圳)有限公司 Light conducting plate and back light module
JP2007273091A (en) * 2006-03-30 2007-10-18 Fujitsu Ltd Prism light guide plate, lighting device, and electronic device
US20080081132A1 (en) * 2006-03-30 2008-04-03 Bourdelais Robert P Light redirecting film having surface nano-nodules
JP2007280635A (en) * 2006-04-03 2007-10-25 Hitachi Displays Ltd Plane light source device and liquid crystal display using this
FR2900220B1 (en) * 2006-04-24 2008-07-18 Valeo Vision Sa LIGHTING OR SIGNALING DEVICE WITH DEPTH EFFECT.
KR100751519B1 (en) * 2006-05-08 2007-08-23 미래나노텍(주) Optical sheet and back light assembly of luquid crystal display equipped with the prism sheet
US7677146B2 (en) * 2006-05-10 2010-03-16 3M Innovative Properties Company Cutting tool using one or more machined tool tips in a continuous or interrupted cut fast tool servo
US7842376B2 (en) * 2006-05-24 2010-11-30 Zhijian Lu Diffusers and methods of manufacture
US20070279935A1 (en) * 2006-05-31 2007-12-06 3M Innovative Properties Company Flexible light guide
US7876489B2 (en) 2006-06-05 2011-01-25 Pixtronix, Inc. Display apparatus with optical cavities
TW200745490A (en) * 2006-06-07 2007-12-16 Jeng Shiang Prec Ind Co Ltd Light guide plate
RU2006119965A (en) * 2006-06-07 2007-12-27 Самсунг Электроникс Ко., Лтд. (KR) OPTICAL FILM
US7670726B2 (en) * 2006-07-20 2010-03-02 Zhijian Lu Optical diffusers, photomasks and their methods of fabrication
US20080024870A1 (en) * 2006-07-27 2008-01-31 Bourdelais Robert P Light-redirecting film containing optical modification layer
US20080032096A1 (en) * 2006-08-07 2008-02-07 Eastman Kodak Company Microstructured film containing polysulfone polymer
US7498534B2 (en) * 2006-08-30 2009-03-03 3M Innovative Properties Company Keypad light guide
US7643218B2 (en) * 2006-08-31 2010-01-05 Skc Haas Display Films Co., Ltd. Light redirecting film having varying optical elements
US8525402B2 (en) 2006-09-11 2013-09-03 3M Innovative Properties Company Illumination devices and methods for making the same
US7481563B2 (en) * 2006-09-21 2009-01-27 3M Innovative Properties Company LED backlight
US8581393B2 (en) 2006-09-21 2013-11-12 3M Innovative Properties Company Thermally conductive LED assembly
WO2008051362A1 (en) 2006-10-20 2008-05-02 Pixtronix, Inc. Light guides and backlight systems incorporating light redirectors at varying densities
US20080101759A1 (en) * 2006-10-26 2008-05-01 K Laser Technology, Inc. Prism matrix with random phase structures
EP2086749B1 (en) 2006-11-03 2013-05-08 Trustees Of Tufts College Nanopatterned biopolymer optical device and method of manufacturing the same
CA2704304C (en) * 2006-11-03 2015-01-13 Trustees Of Trufts College Biopolymer optical waveguide and method of manufacturing the same
WO2008127402A2 (en) 2006-11-03 2008-10-23 Trustees Of Tufts College Biopolymer sensor and method of manufacturing the same
US20080106899A1 (en) * 2006-11-03 2008-05-08 Entire Technology Co., Ltd. Direct backlight module
US20100046902A1 (en) * 2006-11-03 2010-02-25 Trustees Of Tufts College Biopolymer photonic crystals and method of manufacturing the same
WO2008056473A1 (en) * 2006-11-09 2008-05-15 Sharp Kabushiki Kaisha Prism sheet and liquid crystal display
CN101191870A (en) * 2006-11-24 2008-06-04 鸿富锦精密工业(深圳)有限公司 Optical plate and preparation method thereof
US7661849B2 (en) * 2006-11-27 2010-02-16 Ping Sun Patrick Lo Illuminated apparatus
CN101191945B (en) * 2006-11-29 2010-11-10 清华大学 Backlight module group
CN101191849A (en) * 2006-12-01 2008-06-04 鸿富锦精密工业(深圳)有限公司 Optical plate
CN101196584A (en) * 2006-12-08 2008-06-11 鸿富锦精密工业(深圳)有限公司 Optical plate
US7628100B2 (en) * 2007-01-05 2009-12-08 3M Innovative Properties Company Cutting tool using one or more machined tool tips with diffractive features in a continuous or interrupted cut fast tool servo
KR100903028B1 (en) * 2007-01-15 2009-06-18 제일모직주식회사 Light guide panel comprising wedge type rear prism for back light unit of tft-lcd
US7852546B2 (en) 2007-10-19 2010-12-14 Pixtronix, Inc. Spacers for maintaining display apparatus alignment
US9176318B2 (en) 2007-05-18 2015-11-03 Pixtronix, Inc. Methods for manufacturing fluid-filled MEMS displays
US20100184499A1 (en) * 2007-02-01 2010-07-22 Ritter Janice E Electronic Game Device and Method of Using the Same
US20080188277A1 (en) 2007-02-01 2008-08-07 Ritter Janice E Electronic Game Device And Method Of Using The Same
US7530726B2 (en) 2007-03-06 2009-05-12 Skc Haas Display Films Co., Ltd. Light redirecting film having discontinuous coating
US7543974B2 (en) * 2007-03-06 2009-06-09 Skc Haas Display Films Co., Ltd. Light redirecting film having variable thickness
DE602008002911D1 (en) * 2007-04-05 2010-11-18 Koninkl Philips Electronics Nv BEAMS FORMER
CN101295034A (en) * 2007-04-26 2008-10-29 鸿富锦精密工业(深圳)有限公司 Back light module and optical plate
CN101295041B (en) * 2007-04-27 2011-12-21 鸿富锦精密工业(深圳)有限公司 Back light module and optical plate
US7733439B2 (en) * 2007-04-30 2010-06-08 Qualcomm Mems Technologies, Inc. Dual film light guide for illuminating displays
EP2160645A2 (en) 2007-05-20 2010-03-10 3M Innovative Properties Company Light recycling hollow cavity type display backlight
WO2008144650A1 (en) * 2007-05-20 2008-11-27 3M Innovative Properties Company Collimating light injectors for edge-lit backlights
WO2008147753A2 (en) * 2007-05-20 2008-12-04 3M Innovative Properties Company White light backlights and the like with efficient utilization of colored led sources
CN101681053B (en) 2007-05-20 2012-03-21 3M创新有限公司 Recycling backlights with semi-specular components
EP2487535A1 (en) 2007-05-20 2012-08-15 3M Innovative Properties Company Design parameters for backlights, which have a thin hollow cavity and recycle the light
US20080295327A1 (en) * 2007-06-01 2008-12-04 3M Innovative Properties Company Flexible circuit
CN101334554B (en) * 2007-06-28 2011-07-27 鸿富锦精密工业(深圳)有限公司 Backlight module group and its optical plate
CN101339327B (en) * 2007-07-04 2011-09-28 鸿富锦精密工业(深圳)有限公司 Backlight module group and its optical plate
CN101354451A (en) * 2007-07-26 2009-01-28 鸿富锦精密工业(深圳)有限公司 Optical plate and manufacture method thereof
CN101354450B (en) * 2007-07-26 2012-03-14 鸿富锦精密工业(深圳)有限公司 Optical plate and manufacture method thereof
CN101363935A (en) * 2007-08-06 2009-02-11 鸿富锦精密工业(深圳)有限公司 Lcd device and optical plate thereof
US20090041553A1 (en) * 2007-08-06 2009-02-12 3M Innovative Properties Company Fly-cutting system and method, and related tooling and articles
CN101363927A (en) * 2007-08-07 2009-02-11 鸿富锦精密工业(深圳)有限公司 Prismatic lens and LCD device using the prismatic lens
CN101363926B (en) * 2007-08-07 2011-11-16 鸿富锦精密工业(深圳)有限公司 LCD device and prismatic lens thereof
CN101373229B (en) * 2007-08-20 2011-02-09 鸿富锦精密工业(深圳)有限公司 LCD device and prismatic lens thereof
CN101393281B (en) * 2007-09-21 2011-02-09 鸿富锦精密工业(深圳)有限公司 Back light module unit and prismatic lens thereof
TWI451138B (en) * 2007-10-05 2014-09-01 Hon Hai Prec Ind Co Ltd Prism sheet and liquid crystal display device using the same
GB2455057A (en) 2007-10-08 2009-06-03 Sharp Kk Prismatic curved sheet optical device for use in a curved display
CN101420829B (en) * 2007-10-25 2011-09-21 深圳富泰宏精密工业有限公司 Metal case and manufacturing method therefor
US7669508B2 (en) * 2007-10-29 2010-03-02 3M Innovative Properties Company Cutting tool using one or more machined tool tips with diffractive features
JP4935627B2 (en) * 2007-10-30 2012-05-23 ソニー株式会社 OPTICAL ELEMENT AND METHOD FOR PRODUCING OPTICAL ELEMENT MANUFACTURING MASTER
WO2009061823A1 (en) 2007-11-05 2009-05-14 Trustees Of Tufts College Fabrication of silk fibroin photonic structures by nanocontact imprinting
WO2009061947A1 (en) * 2007-11-07 2009-05-14 Ashoff Richard D Illuminated tile systems and methods for manufacturing the same
TW200921006A (en) * 2007-11-12 2009-05-16 Whe-Yi Chiang Lighting device
KR20100091215A (en) * 2007-11-19 2010-08-18 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Articles and methods of making articles having a concavity or convexity
US20090129098A1 (en) * 2007-11-19 2009-05-21 Yi-Fang Lin Light guide plate having multi-facet reflection structure
CN101452144A (en) * 2007-12-07 2009-06-10 旭丽电子(广州)有限公司 Optical assembly
US20090147361A1 (en) * 2007-12-07 2009-06-11 3M Innovative Properties Company Microreplicated films having diffractive features on macro-scale features
US20090154198A1 (en) * 2007-12-14 2009-06-18 Joo Hoon Lee Reflection type display apparatus
CN101457901B (en) * 2007-12-14 2010-09-29 富士迈半导体精密工业(上海)有限公司 Light field controlling means and illuminating apparatus employing the light field controlling means
TWI352222B (en) * 2008-01-16 2011-11-11 Coretronic Corp Light-collimating film
WO2009092013A1 (en) 2008-01-18 2009-07-23 Omnicolor, L.P. Pattern generator for a light fixture
CN101939675A (en) * 2008-02-07 2011-01-05 3M创新有限公司 Hollow backlight with structured film
US9541698B2 (en) * 2008-02-22 2017-01-10 3M Innovative Properties Company Backlights having selected output light flux distributions and display systems using same
TW201000976A (en) * 2008-03-19 2010-01-01 I2Ic Corp A directional light source using refractive and reflective optics
US8851734B2 (en) * 2008-03-27 2014-10-07 Skc Haas Display Films Co., Ltd. Light guiding film having light extraction features
TW200946975A (en) * 2008-04-02 2009-11-16 3M Innovative Properties Co Methods and systems for fabricating optical films having superimposed features
US9810817B2 (en) * 2008-04-02 2017-11-07 3M Innovative Properties Company Light directing film and method for making the same
US8248560B2 (en) 2008-04-18 2012-08-21 Pixtronix, Inc. Light guides and backlight systems incorporating prismatic structures and light redirectors
JP5819723B2 (en) * 2008-06-04 2015-11-24 スリーエム イノベイティブ プロパティズ カンパニー Hollow backlight with tilted light source
US8684588B2 (en) * 2008-06-04 2014-04-01 Sharp Kabushiki Kaisha Light guide elements for display device
US7766509B1 (en) 2008-06-13 2010-08-03 Lumec Inc. Orientable lens for an LED fixture
US8002435B2 (en) * 2008-06-13 2011-08-23 Philips Electronics Ltd Philips Electronique Ltee Orientable lens for an LED fixture
US20110135697A1 (en) * 2008-06-18 2011-06-09 Trustees Of Tufts College Edible holographic silk products
CN201237121Y (en) * 2008-06-25 2009-05-13 武良举 Embedded lamp with auxiliary lighting function
CN101619836A (en) * 2008-06-30 2010-01-06 鸿富锦精密工业(深圳)有限公司 Backlight module and diffusion plate thereof
CN101631149B (en) * 2008-07-17 2012-09-26 比亚迪股份有限公司 Mobile phone and method for manufacturing backlight module of shell thereof
US8462292B2 (en) * 2008-07-31 2013-06-11 Rambus Delaware Llc Optically transmissive substrates and light emitting assemblies and methods of making same, and methods of displaying images using the optically transmissive substrates and light emitting assemblies
US7920317B2 (en) 2008-08-04 2011-04-05 Pixtronix, Inc. Display with controlled formation of bubbles
WO2010027942A1 (en) * 2008-09-02 2010-03-11 Qualcom Mems Technologies, Inc. Light turning device with prismatic light turning features
US8358266B2 (en) * 2008-09-02 2013-01-22 Qualcomm Mems Technologies, Inc. Light turning device with prismatic light turning features
US9004713B2 (en) 2008-09-10 2015-04-14 Man-D-Tec, Inc. Illumination assembly
US8092035B2 (en) * 2008-09-10 2012-01-10 Man-D-Tec Illumination method and assembly
US8317360B2 (en) * 2008-09-18 2012-11-27 Guardian Industries Corp. Lighting system cover including AR-coated textured glass, and method of making the same
US20100080007A1 (en) * 2008-09-29 2010-04-01 Ping-Han Chuang Light distribution board having improved grating structure including a plurality of light gratings each with multiple focuses
US8886334B2 (en) 2008-10-07 2014-11-11 Mc10, Inc. Systems, methods, and devices using stretchable or flexible electronics for medical applications
US9289132B2 (en) 2008-10-07 2016-03-22 Mc10, Inc. Catheter balloon having stretchable integrated circuitry and sensor array
US8097926B2 (en) 2008-10-07 2012-01-17 Mc10, Inc. Systems, methods, and devices having stretchable integrated circuitry for sensing and delivering therapy
US8389862B2 (en) 2008-10-07 2013-03-05 Mc10, Inc. Extremely stretchable electronics
US8372726B2 (en) 2008-10-07 2013-02-12 Mc10, Inc. Methods and applications of non-planar imaging arrays
US8169679B2 (en) 2008-10-27 2012-05-01 Pixtronix, Inc. MEMS anchors
DE102008055865A1 (en) 2008-11-05 2010-05-12 Lisa Dräxlmaier GmbH Sensing device for operating electrical load in vehicle, particularly for integration in body trim, has fixed elastically deformed actuating surface, and flat elastically deformed light guide for illuminating symbolism
US20100129617A1 (en) * 2008-11-21 2010-05-27 Corrigan Thomas R Laser ablation tooling via sparse patterned masks
US20100128351A1 (en) * 2008-11-21 2010-05-27 3M Innovative Properties Company Curved sided cone structures for controlling gain and viewing angle in an optical film
US8317352B2 (en) 2008-12-11 2012-11-27 Robert Saccomanno Non-invasive injection of light into a transparent substrate, such as a window pane through its face
TWI514421B (en) * 2008-12-31 2015-12-21 Ind Tech Res Inst Transparent conducting composite film with anti-reflection
KR20110104090A (en) 2009-01-13 2011-09-21 퀄컴 엠이엠스 테크놀로지스, 인크. Large area light panel and screen
US8246212B2 (en) * 2009-01-30 2012-08-21 Koninklijke Philips Electronics N.V. LED optical assembly
CA2789009C (en) 2009-02-12 2017-03-21 Trustees Of Tufts College Nanoimprinting of silk fibroin structures for biomedical and biophotonic applications
KR101294851B1 (en) * 2009-04-01 2013-08-08 엘지디스플레이 주식회사 Liquid crystal display and driving method of thereof
CN101852876B (en) * 2009-04-02 2012-06-13 财团法人工业技术研究院 Composite optical diaphragm and surface light source module
KR101877058B1 (en) 2009-04-24 2018-07-10 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Light assembly
JPWO2010134255A1 (en) * 2009-05-18 2012-11-08 日本電気株式会社 Infrared sensor, electronic device, and method of manufacturing infrared sensor
WO2010138765A1 (en) 2009-05-29 2010-12-02 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US20100309409A1 (en) * 2009-06-03 2010-12-09 Starkey Kurt R Light emitting assemblies having defined regions of different brightness
CN101956925B (en) * 2009-07-16 2012-12-26 瀚宇彩晶股份有限公司 Backlight module and electronic device
CA2803833A1 (en) 2009-07-20 2011-04-21 Tufts University/Trustees Of Tufts College All-protein implantable, resorbable reflectors
BR112012001292A2 (en) 2009-07-21 2019-09-24 3M Innovantive Properties Company light set
CN101995601A (en) * 2009-08-11 2011-03-30 友辉光电股份有限公司 Luminance inhancement optical substrate with anti-interference-fringe structure
DE102009038469B4 (en) * 2009-08-21 2015-02-12 Advanced Display Technology Ag Display element and method for driving a display element
WO2011026101A2 (en) 2009-08-31 2011-03-03 Trustees Of Tufts College Silk transistor devices
US20110070398A1 (en) * 2009-09-18 2011-03-24 3M Innovative Properties Company Laser ablation tooling via distributed patterned masks
WO2011041727A1 (en) 2009-10-01 2011-04-07 Mc10, Inc. Protective cases with integrated electronics
CN102576113B (en) 2009-10-24 2014-12-17 3M创新有限公司 Immersed asymmetric reflector with reduced color
WO2011050982A1 (en) 2009-10-29 2011-05-05 Arno Martin Sauer Plate for producing an led-illuminated sign
CN102072433B (en) * 2009-11-23 2012-11-21 群康科技(深圳)有限公司 Backlight module and optical board thereof
TWI409544B (en) * 2009-11-23 2013-09-21 Global Lighting Technologies Method and Structure of Luminous Homogenization of Backlight Module
TW201118692A (en) * 2009-11-27 2011-06-01 Coretronic Corp Light guide apparatus and optical touch display apparatus
JP5152928B2 (en) * 2009-12-03 2013-02-27 株式会社エス・ケー・ジー Partition plate device
US9936574B2 (en) 2009-12-16 2018-04-03 The Board Of Trustees Of The University Of Illinois Waterproof stretchable optoelectronics
US10918298B2 (en) 2009-12-16 2021-02-16 The Board Of Trustees Of The University Of Illinois High-speed, high-resolution electrophysiology in-vivo using conformal electronics
US10441185B2 (en) 2009-12-16 2019-10-15 The Board Of Trustees Of The University Of Illinois Flexible and stretchable electronic systems for epidermal electronics
KR101587551B1 (en) * 2009-12-17 2016-01-21 삼성전자주식회사 3 3 Waveguide plate for 3D image display and 3D image display apparatus employing the same
US9581739B2 (en) 2009-12-21 2017-02-28 3M Innovative Properties Company Transflective articles and light assemblies
TWI400531B (en) * 2009-12-23 2013-07-01 Innolux Corp Optical plate and backlight module using the same
US20110157867A1 (en) * 2009-12-28 2011-06-30 Chi-Feng Lin Diffusion plate having microstructures with two lengthy and slant faces applied for backlight module and optical device
KR20120139854A (en) 2010-02-02 2012-12-27 픽스트로닉스 인코포레이티드 Circuits for controlling display apparatus
CN102834763B (en) 2010-02-02 2015-07-22 皮克斯特罗尼克斯公司 Methods for manufacturing cold seal fluid-filled display apparatus
DE102010002282A1 (en) 2010-02-24 2011-08-25 Lisa Dräxlmaier GmbH, 84137 Interior trim part and outer trim part of a vehicle with an ultrasonic sensor
EP2547258B1 (en) 2010-03-17 2015-08-05 The Board of Trustees of the University of Illionis Implantable biomedical devices on bioresorbable substrates
US20110278147A1 (en) * 2010-05-13 2011-11-17 Global Lighting Technologies, Inc. Keyboard device
TW201142384A (en) * 2010-05-18 2011-12-01 Global Lighting Technolog Inc Light guide panel, front-light module and reflctive display apparatus
GB201008599D0 (en) * 2010-05-24 2010-07-07 Design Led Products Ltd Light guide device
JP5803320B2 (en) * 2010-09-14 2015-11-04 大日本印刷株式会社 Surface light source device, liquid crystal display device, and optical member
TW201213970A (en) * 2010-09-30 2012-04-01 Global Lighting Technolog Inc Backlight module and liquid crystal display
KR101226936B1 (en) * 2010-11-10 2013-01-30 주식회사 엘지화학 Optical member and method for manufacturing the same and backlight using the optical member, and method for manufacturing the same
CN102081188A (en) * 2011-01-10 2011-06-01 苏州向隆塑胶有限公司 Light guide plate and manufacturing method thereof
TWI442110B (en) * 2011-01-26 2014-06-21 Coretronic Corp Light guide plate and light source module
CN102062894A (en) * 2011-02-22 2011-05-18 苏州向隆塑胶有限公司 Optical board
TWI417584B (en) * 2011-03-03 2013-12-01 Futis Internat Ltd Method for forming a microretarder film
JP2012195220A (en) * 2011-03-17 2012-10-11 Enplas Corp Surface light source device
WO2012158414A1 (en) 2011-05-13 2012-11-22 3M Innovative Properties Company Back-lit transmissive display having variable index light extraction layer
WO2012158709A1 (en) 2011-05-16 2012-11-22 The Board Of Trustees Of The University Of Illinois Thermally managed led arrays assembled by printing
WO2012166686A2 (en) 2011-05-27 2012-12-06 Mc10, Inc. Electronic, optical and/or mechanical apparatus and systems and methods for fabricating same
EP2713863B1 (en) 2011-06-03 2020-01-15 The Board of Trustees of the University of Illionis Conformable actively multiplexed high-density surface electrode array for brain interfacing
TW201303223A (en) * 2011-06-09 2013-01-16 Rambus Inc Lighting assembly
TW201305487A (en) 2011-07-13 2013-02-01 Rambus Inc Lighting assembly with controlled configurable light redirection
US8899813B2 (en) 2011-08-05 2014-12-02 Rambus Delaware Llc Lighting assembly with configurable illumination profile
KR20130025638A (en) * 2011-09-02 2013-03-12 엘지이노텍 주식회사 Optical sheet
WO2013058961A1 (en) 2011-10-20 2013-04-25 Rambus Inc. Modular light-emitting panel assembly
KR20130047334A (en) * 2011-10-31 2013-05-08 엘지이노텍 주식회사 Illuminating member and illumination device including the illuminating member
CN102410474A (en) * 2011-11-07 2012-04-11 苏州艾隆科技有限公司 LED (light-emitting diode) backlight sheet of intelligent medicine framework
US20140140091A1 (en) 2012-11-20 2014-05-22 Sergiy Victorovich Vasylyev Waveguide illumination system
CN108389893A (en) 2011-12-01 2018-08-10 伊利诺伊大学评议会 It is designed to undergo the transient state device of programmable transformation
WO2013115864A1 (en) 2012-02-03 2013-08-08 Rambus Inc. Center-lit lighting assembly
WO2013131167A1 (en) 2012-03-05 2013-09-12 Fluxwerx Illumination Inc. Light emitting panel assemblies and light guides therefor
TWI670738B (en) * 2012-03-13 2019-09-01 美商盧米泰克斯公司 Light guide and keyboard backlight
US8328403B1 (en) * 2012-03-21 2012-12-11 Morgan Solar Inc. Light guide illumination devices
EP2830492B1 (en) 2012-03-30 2021-05-19 The Board of Trustees of the University of Illinois Appendage mountable electronic devices conformable to surfaces and method of making the same
JP5631920B2 (en) * 2012-04-04 2014-11-26 京セラドキュメントソリューションズ株式会社 Image forming apparatus
CN102621624A (en) * 2012-04-24 2012-08-01 丹阳博昱科技有限公司 Light guide sheet including optical micro structure and making method
TWI539211B (en) * 2012-04-30 2016-06-21 中強光電股份有限公司 Light guide plate and backlight module using the same
CN102681083B (en) * 2012-05-03 2015-07-15 丹阳博昱科技有限公司 Light guide plate with concave microstructure and manufacturing method thereof
TWI457663B (en) * 2012-05-16 2014-10-21 友達光電股份有限公司 Backlight module
CN103454847B (en) * 2012-05-29 2016-05-18 杨文君 Slab guide display and system
EP2685295A1 (en) * 2012-07-10 2014-01-15 Belux IP AG Lateral light feed
KR101287802B1 (en) * 2012-07-16 2013-07-19 주식회사 세코닉스 A Optical Film Having Pattern Diffused Reflection
US9028129B2 (en) 2012-10-01 2015-05-12 Rambus Delaware Llc LED lamp and led lighting assembly
JP6313771B2 (en) 2012-10-08 2018-04-18 ラムバス・デラウェア・リミテッド・ライアビリティ・カンパニーRambus Delaware Llc Manufactured articles having fine structures with different surface roughness
US9171794B2 (en) 2012-10-09 2015-10-27 Mc10, Inc. Embedding thin chips in polymer
WO2014067006A1 (en) 2012-10-31 2014-05-08 Fluxwerx Illumination Inc. Light extraction elements
US9091411B2 (en) 2012-11-02 2015-07-28 Osram Sylvania Inc. Illumination techniques and devices
EP2926051A1 (en) 2012-11-30 2015-10-07 Rambus Delaware LLC Lighting assembly with defined angular output
KR101481677B1 (en) 2012-11-30 2015-01-13 엘지디스플레이 주식회사 Back Light Unit and Liquid Crystal Display device Comprising The Same And Fabricating Method thereof
TW201425812A (en) * 2012-12-20 2014-07-01 Wintek Corp Illumination apparatus
CN103901523A (en) * 2012-12-27 2014-07-02 鸿富锦精密工业(深圳)有限公司 Light guide plate
CN103912797A (en) * 2013-01-06 2014-07-09 纬创资通股份有限公司 Backlight module
US9869432B2 (en) 2013-01-30 2018-01-16 Cree, Inc. Luminaires using waveguide bodies and optical elements
US9625638B2 (en) 2013-03-15 2017-04-18 Cree, Inc. Optical waveguide body
US9690029B2 (en) 2013-01-30 2017-06-27 Cree, Inc. Optical waveguides and luminaires incorporating same
US9366396B2 (en) 2013-01-30 2016-06-14 Cree, Inc. Optical waveguide and lamp including same
US9291320B2 (en) 2013-01-30 2016-03-22 Cree, Inc. Consolidated troffer
US9442243B2 (en) 2013-01-30 2016-09-13 Cree, Inc. Waveguide bodies including redirection features and methods of producing same
US9519095B2 (en) 2013-01-30 2016-12-13 Cree, Inc. Optical waveguides
US20140240207A1 (en) * 2013-02-27 2014-08-28 Motorola Mobility Llc Low-power display and corresponding lighting apparatus and methods of operation
US9110331B2 (en) 2013-03-13 2015-08-18 Vizio, Inc. Ultra-thin backlight for LCD displays through use of field-induced polymer electro luminescence panels including integrated light guide
US9134552B2 (en) 2013-03-13 2015-09-15 Pixtronix, Inc. Display apparatus with narrow gap electrostatic actuators
US20140268879A1 (en) * 2013-03-14 2014-09-18 Panasonic Corporation Transparent waveguide diffuser for lighting and methods of manufacturing transparent waveguide diffuser
US9696022B2 (en) 2013-03-14 2017-07-04 Mandy Holdings Lllp Downward illumination assembly
US9366799B2 (en) 2013-03-15 2016-06-14 Cree, Inc. Optical waveguide bodies and luminaires utilizing same
US10436970B2 (en) 2013-03-15 2019-10-08 Ideal Industries Lighting Llc Shaped optical waveguide bodies
US10400984B2 (en) 2013-03-15 2019-09-03 Cree, Inc. LED light fixture and unitary optic member therefor
US9920901B2 (en) 2013-03-15 2018-03-20 Cree, Inc. LED lensing arrangement
US10502899B2 (en) * 2013-03-15 2019-12-10 Ideal Industries Lighting Llc Outdoor and/or enclosed structure LED luminaire
US10209429B2 (en) 2013-03-15 2019-02-19 Cree, Inc. Luminaire with selectable luminous intensity pattern
US10379278B2 (en) * 2013-03-15 2019-08-13 Ideal Industries Lighting Llc Outdoor and/or enclosed structure LED luminaire outdoor and/or enclosed structure LED luminaire having outward illumination
US20150049511A1 (en) * 2013-03-15 2015-02-19 Cree, Inc. Waveguide Having Unidirectional Illuminance
US9200784B2 (en) 2013-03-15 2015-12-01 Man-D-Tec, Inc. Downward illumination assembly
US9798072B2 (en) 2013-03-15 2017-10-24 Cree, Inc. Optical element and method of forming an optical element
JP6136502B2 (en) * 2013-04-15 2017-05-31 ソニー株式会社 Lighting device, lighting system
TWI472817B (en) * 2013-04-30 2015-02-11 Radiant Opto Electronics Corp A light guide means and a backlight module having the light guide means
FR3006065B1 (en) * 2013-05-22 2016-09-16 Valeo Vision REFLECTIVE PATTERN OPTICAL GUIDE FOR THE PROPAGATION OF A BRIGHT BEAM
TWI500985B (en) * 2013-07-23 2015-09-21 Cheng Tao Lee Light guide
GB201315241D0 (en) 2013-08-27 2013-10-09 Nano Lit Technologies Ltd Improvements in or relating to lighting
US9933144B2 (en) 2013-09-20 2018-04-03 Man-D-Tec, Inc. Light fixture mounting assembly
US9453639B2 (en) 2013-09-24 2016-09-27 Mandy Holdings Lllp Rectilinear light source for elevator interior
KR102125451B1 (en) 2013-11-15 2020-06-22 엘지이노텍 주식회사 Device using same
US9651740B2 (en) 2014-01-09 2017-05-16 Cree, Inc. Extraction film for optical waveguide and method of producing same
KR102264379B1 (en) * 2014-02-05 2021-06-15 엘지이노텍 주식회사 Optical device and lighting device using the same
US9645301B2 (en) 2014-03-28 2017-05-09 Rambus Delaware Llc Lighting assembly with edge-lit light guide and structured cover
US10371350B2 (en) * 2014-04-01 2019-08-06 3M Innovative Properties Company Asymmetric turning film with multiple light sources
US9703031B2 (en) 2014-04-28 2017-07-11 Rambus Delaware Llc Light guide and lighting assembly with array of rotated micro-optical elements
EP2944866A1 (en) 2014-05-12 2015-11-18 SMR Patents S.à.r.l. Optical unit, display device, rear view device and motor vehicle including the same
TWI518387B (en) * 2014-05-26 2016-01-21 元太科技工業股份有限公司 Front light module and display device
TWI521297B (en) * 2014-05-30 2016-02-11 中強光電股份有限公司 Wavelength conversion module and illumination system
KR20160007695A (en) * 2014-06-24 2016-01-21 삼성디스플레이 주식회사 Back-light assembly and display device having the same
TWM487458U (en) * 2014-06-27 2014-10-01 Taiwan Kangdexin Composite Material Co Ltd Optical turning film and wide viewing angle liquid crystal display including the same
CN104065842A (en) * 2014-07-04 2014-09-24 江苏达伦电子股份有限公司 Wireless illumination system achieving lamp control based on cellphone positioning
DE202014103304U1 (en) * 2014-07-17 2015-10-21 Zumtobel Lighting Gmbh Luminaire assembly and thus equipped lighting device
US9664907B2 (en) * 2014-07-21 2017-05-30 Applied Materials Israel Ltd. Optical element for spatial beam shaping
EP3194842A2 (en) * 2014-07-31 2017-07-26 Rambus Delaware LLC Light guide and lighting assembly having light redirecting features
WO2016019220A1 (en) 2014-07-31 2016-02-04 Rambus Delaware Llc Light guide and lighting assembly with array of micro-optical element groupings
US9671609B2 (en) * 2014-08-01 2017-06-06 Sct Technology, Ltd. Display device and method for reducing moiré effects using the same
KR20160022220A (en) * 2014-08-18 2016-02-29 (주)뉴옵틱스 Light guide plate, backlight unit and display device having the same
US9753206B2 (en) * 2014-08-18 2017-09-05 New Optics, Ltd Light guide plate, and backlight unit and display device including the same
US9910206B2 (en) 2014-09-30 2018-03-06 Rambus Delaware Llc Micro-optical element having surface with curvature about a direction extending in a plane parallel to major surface of light guide, and light guide and lighting assembly including same
WO2016053670A1 (en) 2014-10-01 2016-04-07 True Manufacturing Co., Inc. Edge-lit door for refrigerator unit
US10216285B2 (en) 2015-02-02 2019-02-26 Microsoft Technology Licensing, Llc Backlit illumination of electronics
US20160245986A1 (en) 2015-02-25 2016-08-25 Rambus Delaware Llc Light guide assembly, housing assembly, and lighting assembly including same
US9547118B2 (en) * 2015-03-07 2017-01-17 Ledyoung Technology Corporation Light guide panel with an improved light guide structure
CN107407818A (en) * 2015-03-26 2017-11-28 皇家飞利浦有限公司 The display device of directionality control with output and backlight and light directing method for this display device
KR20160132182A (en) 2015-05-06 2016-11-17 삼성디스플레이 주식회사 Display panel and fabricating mehtod of the same
KR20180004225A (en) * 2015-05-08 2018-01-10 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Light guide
WO2016196675A1 (en) 2015-06-01 2016-12-08 The Board Of Trustees Of The University Of Illinois Miniaturized electronic systems with wireless power and near-field communication capabilities
MX2017015587A (en) 2015-06-01 2018-08-23 Univ Illinois Alternative approach to uv sensing.
EP3322931B1 (en) * 2015-07-15 2020-04-22 CoeLux S.r.l. Chromatic reflective unit
WO2017031035A1 (en) * 2015-08-14 2017-02-23 Rambus Delaware Llc Light extracting element having serpentine shape, light redirecting element having serpentine shape, and lighting assembly including the same
US10925543B2 (en) 2015-11-11 2021-02-23 The Board Of Trustees Of The University Of Illinois Bioresorbable silicon electronics for transient implants
KR102405126B1 (en) * 2016-02-22 2022-06-07 루미레즈 엘엘씨 Asymmetric light intensity distribution from the luminary
EP3427307A4 (en) 2016-03-08 2020-01-01 Lilibrand LLC Lighting system with lens assembly
RU2629150C1 (en) * 2016-03-15 2017-08-24 Общество с ограниченной ответственностью "МеталлЭффект" Dynamic image forming device and method of its obtaining
WO2017181165A1 (en) 2016-04-15 2017-10-19 Rambus Delaware Llc Lighting assembly with differing light output distribution and/or spectrum output
US10649130B2 (en) 2016-04-22 2020-05-12 Signify Holding B.V. Pebble-plate like louvre with specific domain characteristics
US10416377B2 (en) 2016-05-06 2019-09-17 Cree, Inc. Luminaire with controllable light emission
US11719882B2 (en) 2016-05-06 2023-08-08 Ideal Industries Lighting Llc Waveguide-based light sources with dynamic beam shaping
CN109891150A (en) * 2016-06-10 2019-06-14 康宁股份有限公司 Micro-structural and patterned light guide plate and the equipment including the light guide plate
JP6645371B2 (en) * 2016-07-15 2020-02-14 オムロン株式会社 Optical device and stereoscopic display method
TWI726006B (en) * 2016-07-15 2021-05-01 日商半導體能源研究所股份有限公司 Display device, input and output device, data processing device
CN106019709A (en) * 2016-07-25 2016-10-12 广州创维平面显示科技有限公司 Liquid crystal module and liquid crystal display screen
KR102557311B1 (en) * 2016-08-08 2023-07-20 삼성디스플레이 주식회사 Display apparatus
CN108139591B (en) * 2016-09-20 2020-08-14 京东方科技集团股份有限公司 Three-dimensional display panel, three-dimensional display apparatus including the same, and method of manufacturing the same
GB2554416A (en) 2016-09-26 2018-04-04 Design Led Ltd Illuminated eyewear device
US20180088270A1 (en) * 2016-09-29 2018-03-29 Amazon Technologies, Inc. Lightguide assembly for electronic display
US11294175B2 (en) 2016-10-05 2022-04-05 Lg Innotek Co., Ltd. Head up display device
US10223952B2 (en) 2016-10-26 2019-03-05 Microsoft Technology Licensing, Llc Curved edge display with controlled distortion
US10185064B2 (en) 2016-10-26 2019-01-22 Microsoft Technology Licensing, Llc Curved edge display with controlled luminance
US20180164493A1 (en) 2016-12-09 2018-06-14 Rambus Delaware Llc Cluster-shaped light-extracting element
EP3551932A1 (en) 2016-12-12 2019-10-16 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Light emitting device
US11022745B2 (en) * 2016-12-29 2021-06-01 Corning Incorporated Microstructured and patterned light guide plates and devices comprising the same
CN110998880A (en) 2017-01-27 2020-04-10 莉莉布兰德有限责任公司 Illumination system with high color rendering index and uniform planar illumination
US20180328552A1 (en) 2017-03-09 2018-11-15 Lilibrand Llc Fixtures and lighting accessories for lighting devices
DE102017003036A1 (en) * 2017-03-29 2018-10-04 Singulus Technologies Ag illuminant
KR20200026909A (en) 2017-06-30 2020-03-11 브라이트 뷰 테크놀로지즈 코포레이션 Lighting system comprising a light transmissive structure and a light transmissive structure for redistribution of light
US10810914B2 (en) 2017-08-09 2020-10-20 True Manufacturing Co., Inc. Illuminating display window and merchandiser display unit comprising same
TW201921060A (en) 2017-09-15 2019-06-01 美商瑞爾D斯帕克有限責任公司 Optical stack for switchable directional display
US11115647B2 (en) 2017-11-06 2021-09-07 Reald Spark, Llc Privacy display apparatus
US10012356B1 (en) 2017-11-22 2018-07-03 LightLouver LLC Light-redirecting optical daylighting system
KR102461800B1 (en) * 2017-11-27 2022-11-01 삼성디스플레이 주식회사 Color conversion substrate and liquid crystal display device including the same
US10976578B2 (en) 2018-01-25 2021-04-13 Reald Spark, Llc Reflective optical stack for privacy display
WO2019183525A1 (en) 2018-03-22 2019-09-26 Reald Spark, Llc Optical waveguide for directional backlight
US10768430B2 (en) * 2018-03-29 2020-09-08 Sharp Kabushiki Kaisha Display device and head-mounted display
US11106086B2 (en) * 2018-04-20 2021-08-31 Chimei Corporation Optical plate with protrusions, optical structure, backlight module and display device
TWI702443B (en) * 2018-04-20 2020-08-21 奇美實業股份有限公司 Optical plate, optical structure, backlight module and display device with protrusions
WO2019213299A1 (en) 2018-05-01 2019-11-07 Lilibrand Llc Lighting systems and devices with central silicone module
EP3814832A4 (en) 2018-06-29 2022-04-06 RealD Spark, LLC Stabilization for privacy display
CN112602011A (en) 2018-07-18 2021-04-02 瑞尔D斯帕克有限责任公司 Optical stack for switchable directional display
US10739513B2 (en) 2018-08-31 2020-08-11 RAB Lighting Inc. Apparatuses and methods for efficiently directing light toward and away from a mounting surface
CN109655958B (en) * 2018-09-13 2020-11-10 韩国高一智株式会社 Light guide plate with concave angle shape and backlight module using same
US10801679B2 (en) 2018-10-08 2020-10-13 RAB Lighting Inc. Apparatuses and methods for assembling luminaires
CH715534A1 (en) * 2018-11-12 2020-05-15 Regent Beleuchtungskoerper Ag Optics and table lamp.
WO2020131933A1 (en) 2018-12-17 2020-06-25 Lilibrand Llc Strip lighting systems which comply with ac driving power
CN113508334A (en) 2019-01-07 2021-10-15 瑞尔D斯帕克有限责任公司 Optical stack for privacy displays
EP3924776A4 (en) 2019-02-12 2022-10-19 RealD Spark, LLC Diffuser for privacy display
CN109765725B (en) * 2019-03-26 2021-04-06 合肥京东方光电科技有限公司 Collimation film, collimation backlight module, display module and display device
US11880235B2 (en) 2019-05-10 2024-01-23 Apple Inc. Electronic devices with enhanced display areas
TW202102883A (en) 2019-07-02 2021-01-16 美商瑞爾D斯帕克有限責任公司 Directional display apparatus
TWI696855B (en) * 2019-08-30 2020-06-21 達運精密工業股份有限公司 Backlight module and manufacture method of light guide plate
EP4038605A4 (en) 2019-10-02 2023-10-18 RealD Spark, LLC Privacy display apparatus
KR102217600B1 (en) * 2019-10-17 2021-02-19 현대모비스 주식회사 Light guide device and method for turning on sequencially the light guide device
KR20220098382A (en) 2019-11-13 2022-07-12 리얼디 스파크, 엘엘씨 Off-axis display device
TWI710837B (en) * 2019-11-21 2020-11-21 友達光電股份有限公司 Backlight module
US11796828B2 (en) 2019-12-10 2023-10-24 Reald Spark, Llc Control of reflections of a display device
US11460627B2 (en) * 2019-12-17 2022-10-04 Coretronic Corporation Backlight module
US11898720B2 (en) 2020-01-15 2024-02-13 Man-D-Tec, Inc. Downlight fixture housing fabrication
US11496090B2 (en) * 2020-02-20 2022-11-08 National Taiwan Normal University Light-modulating device
JP7435066B2 (en) * 2020-03-11 2024-02-21 オムロン株式会社 Display devices and gaming machines
EP4143041A1 (en) 2020-04-30 2023-03-08 RealD Spark, LLC Directional display apparatus
EP4143631A1 (en) 2020-04-30 2023-03-08 RealD Spark, LLC Directional display apparatus
WO2021222611A1 (en) 2020-04-30 2021-11-04 Reald Spark, Llc Directional display apparatus
CN111487711A (en) * 2020-05-29 2020-08-04 北京小米移动软件有限公司 Optical component, backlight module, electronic equipment and manufacturing method of optical component
TW202204818A (en) 2020-07-29 2022-02-01 美商瑞爾D斯帕克有限責任公司 Pupillated illumination apparatus
US11624944B2 (en) 2020-07-29 2023-04-11 Reald Spark, Llc Backlight for switchable directional display
TWI752721B (en) * 2020-11-10 2022-01-11 誠屏科技股份有限公司 Light guide plate and light source device
USD936892S1 (en) 2020-11-13 2021-11-23 Hgci, Inc. Lens cover for light fixture for indoor grow application
CN112402809B (en) * 2020-11-23 2022-01-28 于蛟 Clinical paediatrics jaundice treatment device of using
CN113156695A (en) * 2021-04-06 2021-07-23 Tcl华星光电技术有限公司 Visual angle diffusion film and display panel
US20220365341A1 (en) * 2021-05-12 2022-11-17 Cm Visual Technology Corporation Optical film
CN117545955A (en) * 2021-07-01 2024-02-09 矽光学有限公司 Light guide and display screen using the same
CN115812167A (en) 2021-07-14 2023-03-17 瑞仪(广州)光电子器件有限公司 Backlight module and display device
US11892717B2 (en) 2021-09-30 2024-02-06 Reald Spark, Llc Marks for privacy display
FI20216059A1 (en) * 2021-10-13 2023-04-14 Nanocomp Oy Ltd Light guide
TWI800176B (en) * 2021-12-23 2023-04-21 元太科技工業股份有限公司 Front light module and eletrophoretic display
CN217112978U (en) * 2022-03-07 2022-08-02 中强光电股份有限公司 Light source module and display device
US11892718B2 (en) 2022-04-07 2024-02-06 Reald Spark, Llc Directional display apparatus
CN114563839B (en) * 2022-04-27 2022-09-13 扬昕科技(苏州)有限公司 Light guide element and backlight module
WO2024002838A1 (en) * 2022-06-29 2024-01-04 Signify Holding B.V. Light guide plate design for asymmetric lighting
CN114812425B (en) * 2022-06-30 2022-09-16 江苏康辉新材料科技有限公司 Method for observing micro-deformation of film surface

Citations (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043947A (en) * 1960-04-08 1962-07-10 Gen Electric Light distributing lens system
US4373282A (en) * 1979-12-26 1983-02-15 Hughes Aircraft Company Thin-panel illuminator for front-lit displays
US4460940A (en) * 1981-11-07 1984-07-17 Kei Mori Apparatus for uniform illumination employing light diffuser
US4542449A (en) * 1983-08-29 1985-09-17 Canadian Patents & Development Limited Lighting panel with opposed 45° corrugations
US4729068A (en) * 1986-10-01 1988-03-01 Mitsubishi Rayon Company Ltd. Light diffusing device
US4906070A (en) * 1985-11-21 1990-03-06 Minnesota Mining And Manufacturing Company Totally internally reflecting thin, flexible film
US5056892A (en) * 1985-11-21 1991-10-15 Minnesota Mining And Manufacturing Company Totally internally reflecting thin, flexible film
US5375043A (en) * 1992-07-27 1994-12-20 Inoue Denki Co., Inc. Lighting unit
US5377084A (en) * 1992-10-08 1994-12-27 T. Chatani & Co., Ltd. Surface illuminating apparatus
US5386347A (en) * 1992-10-02 1995-01-31 Photo Craft Co., Ltd. Illuminating apparatus and a method of manufacturing an edge light conductor for use therein
US5390436A (en) * 1990-09-20 1995-02-21 Illumination Research Group, Inc. Display system
US5396350A (en) * 1993-11-05 1995-03-07 Alliedsignal Inc. Backlighting apparatus employing an array of microprisms
US5477422A (en) * 1992-05-22 1995-12-19 Nokia Mobile Phones Limited Illuminated LCD apparatus
US5528709A (en) * 1994-05-25 1996-06-18 Enplas Corporation Corner supply type plane light source device
US5550676A (en) * 1990-09-12 1996-08-27 Mitsubishi Rayon Co., Ltd Surface light source element
US5598280A (en) * 1993-03-23 1997-01-28 Dai Nippon Printing Co., Ltd. Film lens and a surface light source using the same
US5598281A (en) * 1993-11-19 1997-01-28 Alliedsignal Inc. Backlight assembly for improved illumination employing tapered optical elements
US5600462A (en) * 1992-09-16 1997-02-04 International Business Machines Corporation Optical film and liquid crystal display device using the film
US5618096A (en) * 1995-06-27 1997-04-08 Lumitex, Inc. Light emitting panel assemblies
US5641219A (en) * 1990-06-22 1997-06-24 Mizobe; Tatsuji Uniform illumination light emitting device
US5695269A (en) * 1996-01-29 1997-12-09 Delco Electronics Corporation Multi-color display lighting by led
US5719649A (en) * 1994-06-08 1998-02-17 Kabushiki Kaisha Toshiba Light guide and liquid crystal display device using it
US5771328A (en) * 1995-03-03 1998-06-23 Minnesota Mining And Manufacturing Company Light directing film having variable height structured surface and light directing article constructed therefrom
US5775791A (en) * 1992-08-31 1998-07-07 Copal Company Limited Surface emission apparatus
US5779338A (en) * 1994-08-12 1998-07-14 Enplas Corporation Surface light source device
US5844720A (en) * 1995-09-08 1998-12-01 Goyo Paper Working Co., Ltd. Prism sheet
US5890791A (en) * 1995-10-13 1999-04-06 Konica Corporation Light control sheet, surface light source unit and liquid crystal display device
US5917664A (en) * 1996-02-05 1999-06-29 3M Innovative Properties Company Brightness enhancement film with soft cutoff
US5919551A (en) * 1996-04-12 1999-07-06 3M Innovative Properties Company Variable pitch structured optical film
US5921651A (en) * 1995-03-31 1999-07-13 Enplas Corporation Surface light source device of side light type having diffusing element with improved distribution pattern of light
US5931555A (en) * 1989-05-18 1999-08-03 Seiko Epson Corporation Background lighting apparatus for liquid crystal display
US5944405A (en) * 1994-08-12 1999-08-31 Dai Nippon Printing Co., Ltd. Flat light source using light-diffusing sheet with projections thereon
US5961198A (en) * 1996-02-02 1999-10-05 Hitachi, Ltd. Liquid crystal display device and method of manufacturing backlighting light guide panel therefor
US6027221A (en) * 1996-08-05 2000-02-22 Enplas Corporation Surface light source device of side light type and mold for light guide plate employed in the device
US6091547A (en) * 1994-09-27 2000-07-18 3M Innovative Properties Company Luminance control film
US6120280A (en) * 1995-07-28 2000-09-19 Nippon Carbide Kogyo Kabushiki Kaisha Microprism master mold
US6151169A (en) * 1998-05-20 2000-11-21 Lg Electronics, Inc. Sheet type optical device and backlighting unit using the same
US6167182A (en) * 1996-10-25 2000-12-26 Omron Corporation Surface light source device and liquid crystal display device, portable telephone and information terminal employing the surface light source device
US20020163790A1 (en) * 2000-12-14 2002-11-07 Mitsubishi Rayon Co., Ltd. Planar light source system and light deflecting device therefor
US6505959B2 (en) * 2000-04-27 2003-01-14 Dai Nippon Printing Co., Ltd. Directional diffusing film
US6582095B1 (en) * 1999-07-23 2003-06-24 Minebea Co., Ltd. Spread illuminating apparatus
US6712481B2 (en) * 1995-06-27 2004-03-30 Solid State Opto Limited Light emitting panel assemblies
US6731355B2 (en) * 2002-03-08 2004-05-04 Citizen Electronics Co., Ltd. Lighting panel for a display
US6733147B2 (en) * 2000-09-07 2004-05-11 San Zhuang Wang Backlighting system for displays
US20040095769A1 (en) * 2002-11-14 2004-05-20 Huang Kuo Jui Photoconductive structure of backlight module
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
US6761461B2 (en) * 2001-11-15 2004-07-13 Minebea Co., Ltd. Spread illuminating apparatus without light conductive bar
US7044628B2 (en) * 2003-01-07 2006-05-16 Samsung Electronics Co., Ltd. Backlight unit
US7254308B2 (en) * 2004-07-23 2007-08-07 Hon Hai Precision Industry Co., Ltd. Light guide plate and backlight module using the same
US7507011B2 (en) * 2003-11-10 2009-03-24 Omron Corporation Surface light source equipment and apparatus using the same

Family Cites Families (125)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671163A (en) * 1949-07-01 1954-03-02 Measurements Corp Illuminated dial scale
US3070913A (en) 1956-09-25 1963-01-01 Miller Dial & Name Plate Compa Edge-lighted panel
US3328570A (en) 1965-04-09 1967-06-27 Gen Electric Illuminated panel member
US3543014A (en) 1968-05-06 1970-11-24 Farwest Electronics Inc Buried panel-illuminating installation
US3571585A (en) 1968-11-12 1971-03-23 Coastal Dynamics Corp Panel and edge lighting assembly
US3752974A (en) 1971-12-13 1973-08-14 Coastal Dynamics Corp Uniform illumination with edge lighting
US3761703A (en) 1971-12-23 1973-09-25 U S Radium Corp Apparatus for illumination of instrument faces
US3958113A (en) 1973-04-26 1976-05-18 Termohlen Carol I Lighting effects device
US3892959A (en) 1973-11-02 1975-07-01 Gte Automatic Electric Lab Inc Edge-lighted panel arrangement
US4043636A (en) * 1974-12-23 1977-08-23 Intel Corporation Illumination-panel for liquid crystal display of similar device
CH604258B5 (en) 1976-04-02 1978-08-31 Ebauches Sa
US4183628A (en) 1976-05-20 1980-01-15 Ebauches S.A. Electronic watch and display device for such watch
US4177501A (en) 1977-11-15 1979-12-04 Harris Corporation Illuminated keyboard
US4282560A (en) 1979-01-15 1981-08-04 A.C.A. Products, Inc. Light distributor
US4257084A (en) 1979-02-21 1981-03-17 Reynolds Christopher H Display device
US4290093A (en) 1980-03-20 1981-09-15 Lite-A-Guide, Inc. Portable illuminated magazine case
US4446508A (en) 1983-01-17 1984-05-01 Plast-Ad, Inc. Edge lighted article holder
US4573766A (en) 1983-12-19 1986-03-04 Cordis Corporation LED Staggered back lighting panel for LCD module
JPS61127506U (en) 1985-01-30 1986-08-11
JPS61240506A (en) 1985-04-17 1986-10-25 有限会社 フアスタ− Lighting fixture
US4630895A (en) 1985-06-06 1986-12-23 Motorola, Inc. LCD lightguide
US4714983A (en) 1985-06-10 1987-12-22 Motorola, Inc. Uniform emission backlight
US4751615A (en) 1986-08-07 1988-06-14 International Marketing Concepts, Inc. Page light
US4763984A (en) 1987-01-02 1988-08-16 Awai George K Lighting apparatus and method
US4765701A (en) 1987-01-30 1988-08-23 Poly-Optical Products, Inc. Illuminator optical fiber rod
JPH0670882B2 (en) * 1988-08-23 1994-09-07 株式会社明拓システム Edge light panel using single plate
US5005108A (en) 1989-02-10 1991-04-02 Lumitex, Inc. Thin panel illuminator
US4978952A (en) 1989-02-24 1990-12-18 Collimated Displays Incorporated Flat screen color video display
US4974122A (en) 1989-03-28 1990-11-27 Rockwell International Corporation Compact LCD luminaire
DE3919925A1 (en) 1989-06-19 1990-12-20 Inotec Gmbh Ges Fuer Innovativ ILLUMINATED, DISPLAY UNIT, PARTICULARLY HOUSE NUMBER, TRAFFIC SIGN, ADVERTISER
JPH0365982A (en) 1989-08-03 1991-03-20 Pioneer Electron Corp Display board illuminating device for display device
DE3929955A1 (en) 1989-09-08 1991-03-14 Inotec Gmbh Ges Fuer Innovativ LIGHT SPOTLIGHTS
US5283673A (en) 1989-09-30 1994-02-01 Kabushiki Kaisha Meitaku Shisutemu Surface luminous source panel with areas having different reflector speck densities
US4975808A (en) 1989-10-02 1990-12-04 Motorola, Inc. Backlighting apparatus
US5093765A (en) 1990-02-16 1992-03-03 Tosoh Corporation Back lighting device for a panel
US5101325A (en) 1990-03-20 1992-03-31 General Electric Company Uniform illumination of large, thin surfaces particularly suited for automotive applications
US5712481A (en) * 1990-04-09 1998-01-27 Ashland Inc Process and apparatus for analysis of hydrocarbon species by near infrared spectroscopy
EP0462361B1 (en) 1990-06-19 1996-06-19 Enplas Corporation Surface light source device
JP3204999B2 (en) * 1990-06-26 2001-09-04 株式会社スタンレー滋賀製作所 Edge light panel
TW197499B (en) 1990-07-03 1993-01-01 Meitaku Syst Kk
US5079675A (en) * 1990-11-08 1992-01-07 Deilaito Co., Ltd. Surface illuminating apparatus
US5075826A (en) * 1990-12-17 1991-12-24 Lan Ching Hwei Auxiliary brake lamp
US5262928A (en) * 1991-02-21 1993-11-16 Tosoh Corporation Back lighting device
US5128842A (en) * 1991-06-03 1992-07-07 Sunarrow Co., Inc. Uniform illumination plate
US5307244A (en) 1991-07-01 1994-04-26 Matthews Family Revocable Trust Light-insulated lamp and illuminating systems
US5442523A (en) 1991-08-22 1995-08-15 Tosoh Corporation Backlighting device
EP0544332B1 (en) * 1991-11-28 1997-01-29 Enplas Corporation Surface light source device
US5349503A (en) 1991-12-31 1994-09-20 At&T Bell Laboratories Illuminated transparent display with microtextured back reflector
US5552907A (en) * 1992-01-27 1996-09-03 Sekisui Chemical Co., Ltd. Light adjusting sheet having a sinusoidal surface and a non-optically flat surface and useable with an LCD
US5303322A (en) 1992-03-23 1994-04-12 Nioptics Corporation Tapered multilayer luminaire devices
CA2097109C (en) 1992-06-01 2000-01-11 Shozo Kokawa Liquid crystal display
JPH063526A (en) * 1992-06-18 1994-01-14 Fujitsu Ltd Illuminating device
JPH0695112A (en) 1992-09-16 1994-04-08 Hitachi Ltd Prism plate and information display device formed by using this plate
US5339179A (en) 1992-10-01 1994-08-16 International Business Machines Corp. Edge-lit transflective non-emissive display with angled interface means on both sides of light conducting panel
US5432876C1 (en) * 1992-10-19 2002-05-21 Minnesota Mining & Mfg Illumination devices and optical fibres for use therein
FI95491C (en) * 1992-12-30 1996-02-12 Valmet Paper Machinery Inc Paper machine drying section
JPH07113718B2 (en) 1993-03-03 1995-12-06 日本電気株式会社 Backlight device for liquid crystal panel
JP2599121Y2 (en) * 1993-05-07 1999-08-30 株式会社エンプラス Surface light source device
US5390085A (en) 1993-11-19 1995-02-14 Motorola, Inc. Light diffuser for a liquid crystal display
US5395228A (en) * 1994-02-07 1995-03-07 Columbia Machine, Inc. Apparatus for forming concrete products
US5485291A (en) 1994-02-22 1996-01-16 Precision Lamp, Inc. Uniformly thin, high efficiency large area lighting panel with two facet grooves that are spaced apart and have light source facing facets with smaller slopes than the facets facing away from the light source
US5982540A (en) * 1994-03-16 1999-11-09 Enplas Corporation Surface light source device with polarization function
US5671994A (en) * 1994-06-08 1997-09-30 Clio Technologies, Inc. Flat and transparent front-lighting system using microprisms
JP3325710B2 (en) 1994-07-27 2002-09-17 日本ライツ株式会社 Method for manufacturing light guide plate and mold for molding the same, and surface light source device
US5808784A (en) 1994-09-06 1998-09-15 Dai Nippon Printing Co., Ltd. Lens array sheet surface light source, and transmission type display device
JP3219943B2 (en) * 1994-09-16 2001-10-15 株式会社東芝 Planar direct-view display device
JP3990446B2 (en) 1994-09-28 2007-10-10 リフレキサイト・コーポレーション Retroreflective inclined prism structure
US5506929A (en) 1994-10-19 1996-04-09 Clio Technologies, Inc. Light expanding system for producing a linear or planar light beam from a point-like light source
JP3544010B2 (en) 1994-10-25 2004-07-21 本田技研工業株式会社 Vehicle lighting
AU4409496A (en) 1994-11-29 1996-06-19 Precision Lamp, Inc. Edge light for panel display
US5579134A (en) 1994-11-30 1996-11-26 Honeywell Inc. Prismatic refracting optical array for liquid flat panel crystal display backlight
JP3213496B2 (en) * 1994-11-30 2001-10-02 シャープ株式会社 Lighting equipment
US5521342A (en) 1994-12-27 1996-05-28 General Motors Corporation Switch having combined light pipe and printed circuit board
US5576078A (en) 1995-03-27 1996-11-19 Schatz; Alan G. Illuminated christmas ornament
JP3518036B2 (en) 1995-03-30 2004-04-12 東芝ライテック株式会社 Backlight, liquid crystal display device and display device
US5618095A (en) 1995-04-04 1997-04-08 Tosoh Corporation Backlighting device
US5896119A (en) * 1995-06-27 1999-04-20 Silicon Graphics, Inc. Removable backlighting assembly for flat panel display subsystem
US5590945A (en) 1995-07-26 1997-01-07 Industrial Devices, Inc. Illuminated line of light using point light source
US5947578A (en) * 1995-10-24 1999-09-07 Nu-Tech & Engineering, Inc. Back lighting device
DE69636109T2 (en) 1995-11-06 2006-09-21 Seiko Epson Corp. Lighting device, including liquid crystal display and electronic device
JPH09269489A (en) 1996-02-02 1997-10-14 Hitachi Ltd Manufacture of liquid crystal display device and light transmission plate for rear illuminating part
US5838403A (en) * 1996-02-14 1998-11-17 Physical Optics Corporation Liquid crystal display system with internally reflecting waveguide for backlighting and non-Lambertian diffusing
JPH09274184A (en) * 1996-04-04 1997-10-21 Dainippon Printing Co Ltd Lens film and surface light source device using it
JPH1068803A (en) 1996-04-29 1998-03-10 Lockheed Martin Corp Film with reduced scattering
US5831555A (en) * 1996-05-10 1998-11-03 Industrial Technology Research Institute Keyboard encoding system actuated by opening and closing of keyboard cover
TW331593B (en) * 1996-05-13 1998-05-11 Konika Co Ltd Planer light source device and light guide plate
TW368610B (en) 1996-09-24 1999-09-01 Seiko Epson Corp Lighting device and the display monitor employing the lighting device
AUPO260896A0 (en) * 1996-09-26 1996-10-24 Eleven Lighting Pty Limited Display system with improved illumination
US5999685A (en) * 1997-02-07 1999-12-07 Sanyo Electric Co., Ltd. Light guide plate and surface light source using the light guide plate
JPH10227918A (en) 1997-02-18 1998-08-25 Copal Co Ltd Light transmission member of surface-emitting device
JPH10227917A (en) 1997-02-18 1998-08-25 Copal Co Ltd Light transmission member of surface-emitting device
US5913594A (en) 1997-02-25 1999-06-22 Iimura; Keiji Flat panel light source device and passive display device utilizing the light source device
JP3215346B2 (en) 1997-03-28 2001-10-02 シャープ株式会社 Forward illumination device and reflection type liquid crystal display device having the same
US6280063B1 (en) 1997-05-09 2001-08-28 3M Innovative Properties Company Brightness enhancement article
US6280043B1 (en) 1997-05-14 2001-08-28 Enplas Corporation Surface light source device of side light type
JPH10319216A (en) 1997-05-20 1998-12-04 Dainippon Printing Co Ltd Lens film, surface light source device, and liquid crystal display device
JP3327172B2 (en) 1997-06-17 2002-09-24 セイコーエプソン株式会社 Liquid crystal device and electronic equipment using the same
JPH117014A (en) 1997-06-18 1999-01-12 Seiko Epson Corp Illuminator and liquid crystal display device and electric equipment
DE69939647D1 (en) 1998-02-18 2008-11-13 Minnesota Mining & Mfg OPTICAL FILM
JPH11306831A (en) * 1998-04-24 1999-11-05 Citizen Electronics Co Ltd Surface light source unit
TW422346U (en) * 1998-11-17 2001-02-11 Ind Tech Res Inst A reflector device with arc diffusion uint
US6402334B1 (en) * 1999-02-18 2002-06-11 Garmin Corporation Light pipe with quadraspherical depressions for display panels
JP2000280267A (en) 1999-03-30 2000-10-10 Fuji Photo Film Co Ltd Production of light diffusing body
JP3434465B2 (en) * 1999-04-22 2003-08-11 三菱電機株式会社 Backlight for liquid crystal display
NL1013117C2 (en) * 1999-09-22 2001-03-27 Onstream B V ADR system.
US6356391B1 (en) 1999-10-08 2002-03-12 3M Innovative Properties Company Optical film with variable angle prisms
US6845212B2 (en) 1999-10-08 2005-01-18 3M Innovative Properties Company Optical element having programmed optical structures
JP2001166113A (en) 1999-12-08 2001-06-22 Dainippon Printing Co Ltd Light-condensing film, surface light source device and liquid crystal display device
JP3891387B2 (en) * 2000-02-18 2007-03-14 株式会社エンプラス Surface light source device and display device
US6447136B1 (en) * 2000-08-08 2002-09-10 Coretronic Corporation Light guide plate for a backlight system
JP3742570B2 (en) * 2000-08-11 2006-02-08 株式会社エンプラス Light guide plate, surface light source device and display device
US6837533B2 (en) * 2001-08-02 2005-01-04 Cts Fahrzeug-Dachsysteme Gmbh Hardtop vehicle roof with at least two rigid roof parts
JP3943880B2 (en) * 2001-09-18 2007-07-11 キヤノン株式会社 Video data processing apparatus and method
US6837588B2 (en) * 2001-12-25 2005-01-04 Minebea Co., Ltd. Spread illuminating apparatus with means for reflecting light dispersely
JP3952168B2 (en) * 2002-06-11 2007-08-01 富士通株式会社 Electronic device, liquid crystal display device and light guide plate
US7044928B2 (en) * 2003-04-04 2006-05-16 Platex Products, Inc. Tampon applicator assembly having an improved plunger and methods of making
TWI260433B (en) * 2003-07-11 2006-08-21 Hon Hai Prec Ind Co Ltd Backlight module and lightguide plate thereof
JP4273930B2 (en) * 2003-10-31 2009-06-03 ソニー株式会社 Light guide plate and backlight device
TWI285772B (en) * 2004-06-18 2007-08-21 Innolux Display Corp A light guide plate and a backlight module using the same
TWI299412B (en) * 2004-08-27 2008-08-01 Hon Hai Prec Ind Co Ltd Light guide plate and backlight module using the same
JP4512137B2 (en) * 2004-10-09 2010-07-28 チェイル インダストリーズ インコーポレイテッド Light guide plate for liquid crystal display device backlight unit and liquid crystal display device backlight unit using the same
CN100370329C (en) * 2004-11-12 2008-02-20 清华大学 Light conducting plate and back light module
KR20070035130A (en) * 2005-09-27 2007-03-30 삼성전자주식회사 Light guide plate and, back-light assembly and display device having the same
US20070279942A1 (en) * 2006-05-31 2007-12-06 Taiwan Nano Electro-Optical Technology Co., Ltd. Illuminating assembly having refractive member
US7740391B2 (en) * 2007-02-21 2010-06-22 Wintek Corporation Backlight module

Patent Citations (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043947A (en) * 1960-04-08 1962-07-10 Gen Electric Light distributing lens system
US4373282A (en) * 1979-12-26 1983-02-15 Hughes Aircraft Company Thin-panel illuminator for front-lit displays
US4460940A (en) * 1981-11-07 1984-07-17 Kei Mori Apparatus for uniform illumination employing light diffuser
US4542449A (en) * 1983-08-29 1985-09-17 Canadian Patents & Development Limited Lighting panel with opposed 45° corrugations
US4906070A (en) * 1985-11-21 1990-03-06 Minnesota Mining And Manufacturing Company Totally internally reflecting thin, flexible film
US5056892A (en) * 1985-11-21 1991-10-15 Minnesota Mining And Manufacturing Company Totally internally reflecting thin, flexible film
US4729068A (en) * 1986-10-01 1988-03-01 Mitsubishi Rayon Company Ltd. Light diffusing device
US5931555A (en) * 1989-05-18 1999-08-03 Seiko Epson Corporation Background lighting apparatus for liquid crystal display
US5641219A (en) * 1990-06-22 1997-06-24 Mizobe; Tatsuji Uniform illumination light emitting device
US5550676A (en) * 1990-09-12 1996-08-27 Mitsubishi Rayon Co., Ltd Surface light source element
US5390436A (en) * 1990-09-20 1995-02-21 Illumination Research Group, Inc. Display system
US5477422A (en) * 1992-05-22 1995-12-19 Nokia Mobile Phones Limited Illuminated LCD apparatus
US5375043A (en) * 1992-07-27 1994-12-20 Inoue Denki Co., Inc. Lighting unit
US5775791A (en) * 1992-08-31 1998-07-07 Copal Company Limited Surface emission apparatus
US5600462A (en) * 1992-09-16 1997-02-04 International Business Machines Corporation Optical film and liquid crystal display device using the film
US5386347A (en) * 1992-10-02 1995-01-31 Photo Craft Co., Ltd. Illuminating apparatus and a method of manufacturing an edge light conductor for use therein
US5649754A (en) * 1992-10-02 1997-07-22 Photo Craft Co., Ltd. Illuminating apparatus and a method of manufacturing an edge light conductor for use therein
US5377084A (en) * 1992-10-08 1994-12-27 T. Chatani & Co., Ltd. Surface illuminating apparatus
US5598280A (en) * 1993-03-23 1997-01-28 Dai Nippon Printing Co., Ltd. Film lens and a surface light source using the same
US5396350A (en) * 1993-11-05 1995-03-07 Alliedsignal Inc. Backlighting apparatus employing an array of microprisms
US5598281A (en) * 1993-11-19 1997-01-28 Alliedsignal Inc. Backlight assembly for improved illumination employing tapered optical elements
US5528709A (en) * 1994-05-25 1996-06-18 Enplas Corporation Corner supply type plane light source device
US5719649A (en) * 1994-06-08 1998-02-17 Kabushiki Kaisha Toshiba Light guide and liquid crystal display device using it
US5779338A (en) * 1994-08-12 1998-07-14 Enplas Corporation Surface light source device
US5944405A (en) * 1994-08-12 1999-08-31 Dai Nippon Printing Co., Ltd. Flat light source using light-diffusing sheet with projections thereon
US6091547A (en) * 1994-09-27 2000-07-18 3M Innovative Properties Company Luminance control film
US5771328A (en) * 1995-03-03 1998-06-23 Minnesota Mining And Manufacturing Company Light directing film having variable height structured surface and light directing article constructed therefrom
US5921651A (en) * 1995-03-31 1999-07-13 Enplas Corporation Surface light source device of side light type having diffusing element with improved distribution pattern of light
US6712481B2 (en) * 1995-06-27 2004-03-30 Solid State Opto Limited Light emitting panel assemblies
US5618096A (en) * 1995-06-27 1997-04-08 Lumitex, Inc. Light emitting panel assemblies
US6120280A (en) * 1995-07-28 2000-09-19 Nippon Carbide Kogyo Kabushiki Kaisha Microprism master mold
US5844720A (en) * 1995-09-08 1998-12-01 Goyo Paper Working Co., Ltd. Prism sheet
US5890791A (en) * 1995-10-13 1999-04-06 Konica Corporation Light control sheet, surface light source unit and liquid crystal display device
US5695269A (en) * 1996-01-29 1997-12-09 Delco Electronics Corporation Multi-color display lighting by led
US5961198A (en) * 1996-02-02 1999-10-05 Hitachi, Ltd. Liquid crystal display device and method of manufacturing backlighting light guide panel therefor
US5917664A (en) * 1996-02-05 1999-06-29 3M Innovative Properties Company Brightness enhancement film with soft cutoff
US5919551A (en) * 1996-04-12 1999-07-06 3M Innovative Properties Company Variable pitch structured optical film
US6027221A (en) * 1996-08-05 2000-02-22 Enplas Corporation Surface light source device of side light type and mold for light guide plate employed in the device
US6167182A (en) * 1996-10-25 2000-12-26 Omron Corporation Surface light source device and liquid crystal display device, portable telephone and information terminal employing the surface light source device
US6151169A (en) * 1998-05-20 2000-11-21 Lg Electronics, Inc. Sheet type optical device and backlighting unit using the same
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
US7090389B2 (en) * 1999-02-23 2006-08-15 Solid State Opto Limited Method of selecting a light redirecting film
US6582095B1 (en) * 1999-07-23 2003-06-24 Minebea Co., Ltd. Spread illuminating apparatus
US6505959B2 (en) * 2000-04-27 2003-01-14 Dai Nippon Printing Co., Ltd. Directional diffusing film
US6733147B2 (en) * 2000-09-07 2004-05-11 San Zhuang Wang Backlighting system for displays
US20020163790A1 (en) * 2000-12-14 2002-11-07 Mitsubishi Rayon Co., Ltd. Planar light source system and light deflecting device therefor
US6761461B2 (en) * 2001-11-15 2004-07-13 Minebea Co., Ltd. Spread illuminating apparatus without light conductive bar
US6731355B2 (en) * 2002-03-08 2004-05-04 Citizen Electronics Co., Ltd. Lighting panel for a display
US20040095769A1 (en) * 2002-11-14 2004-05-20 Huang Kuo Jui Photoconductive structure of backlight module
US7044628B2 (en) * 2003-01-07 2006-05-16 Samsung Electronics Co., Ltd. Backlight unit
US7507011B2 (en) * 2003-11-10 2009-03-24 Omron Corporation Surface light source equipment and apparatus using the same
US7254308B2 (en) * 2004-07-23 2007-08-07 Hon Hai Precision Industry Co., Ltd. Light guide plate and backlight module using the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134008B2 (en) 2010-10-06 2015-09-15 Shoot The Moon Products Ii, Llc Light emitting decorative panels
US9200781B2 (en) * 2010-10-06 2015-12-01 Shoot The Moon Products Ii, Llc Light emitting decorative panels
US20120170315A1 (en) * 2010-12-31 2012-07-05 Au Optronics Corporation Three-Dimensional Display Apparatus and Backlight Module Thereof
US9194993B2 (en) * 2010-12-31 2015-11-24 Au Optronics Corporation Three-dimensional display apparatus and backlight module thereof
US20120274874A1 (en) * 2011-04-29 2012-11-01 Shenzhen China Star Optoelectronics Technology Co. Ltd. Backlight Module and Liquid Crystal Display Device
WO2012154342A2 (en) * 2011-05-06 2012-11-15 Rambus Inc. Lighting assembly
WO2012154342A3 (en) * 2011-05-06 2013-03-21 Rambus Inc. Lighting assembly
US8864360B2 (en) 2011-05-06 2014-10-21 Rambus Delaware Llc Lighting assembly
US9857520B2 (en) 2011-05-06 2018-01-02 Rambus Delaware Llc Lighting assembly
US10900657B2 (en) 2017-08-01 2021-01-26 Technical Consumer Products, Inc. Edge-lit light fixture having capabilities for a secondary service

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US8845176B2 (en) 2014-09-30
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US7810982B2 (en) 2010-10-12
US6752505B2 (en) 2004-06-22
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