CN105388543A

CN105388543A - Method of forming uneven structure on substrate and method for manufacturing mold

Info

Publication number: CN105388543A
Application number: CN201510511423.4A
Authority: CN
Inventors: 杨景安; 邱威泰; 潘汉聪
Original assignee: Ubright Optronics Corp
Current assignee: Ubright Optronics Corp
Priority date: 2014-08-26
Filing date: 2015-08-19
Publication date: 2016-03-09
Anticipated expiration: 2035-08-19
Also published as: TWI549799B; CN106226849B; CN109270610A; CN109270610B; TW201637803A; CN105388543B; TW201622930A; CN106226849A

Abstract

This invention discloses a method of forming an uneven structure on a substrate. Use a hard tool to penetrate into a mold to cut a first trench and a second trench in an order on a surface of a mold, wherein the hard tool has a smoothly-curved shape such that the transverse width of each of the first trench and the second trench increases as the penetrating depth of the hard tool increases, wherein when each of the first trench and the second trench marches along a first direction, the penetrating depth of the hard tool is controlled by repeating moving the hard tool up and down to cut the mold such that the transverse width of each of the first trench and the second trench varies according to the controlled penetrating depth of the hard tool, wherein the first trench and the second trench completely overlap with each other with no space therebetween. Then, use the surface of the mold to emboss a thin film on a substrate.

Description

Substrate is formed the method for concaveconvex structure and the method for Mold Making

Technical field

The present invention relates to the optical substrate with patterned surface, particularly strengthen the optical substrate with diffusion for brightness, and relate more particularly to be used in brightness enhancing and the diffusion substrate of the flat-panel displays with planar light source.

Background technology

Surface plate display technique is used in television indicator, graphoscope and portable electronic display (such as mobile phone, personal digital assistant (PDA), digital camera, digiboard etc.) usually.Liquid crystal display (LCD) is a kind of flat-panel displays, and its display has liquid crystal (LC) module of pel array, to make video imaging.

Fig. 1 shows the example of LCD display.Backlight LCD 10 comprises liquid crystal (LC) display module 12, the planar light source of 14 forms and many optical thin films of being sandwiched between LC module 12 and backlight module 14 in backlight module.LC module 12 comprises the liquid crystal be sandwiched between two transparency carriers, and the control circuit of definition two-dimensional array.Backlight module 14 provides planar light to distribute, and the back of the body that wherein light source extends in a plane enters formula kenel, or as shown in Figure 1, its linear light source 16 is arranged on the side entering type kenel on light guide plate 18 edge.Reflector plate 20 is provided to guide light to enter light guide plate 18 from linear light sorurce 16 via light guide plate 18 edge.The structure of light guide plate 18 (such as, have tapered panel and light reflects and/or scattering surface 30 is defined within the basal surface of face away from LC module 12), to distribute and to guide light through the top planar surface towards LC module 12.Optical thin film comprises up and down diffusion film 22 and 24, and the light of the plane surface from light guide plate 18 spreads by it.Optical thin film comprises up and down body structure surface, optical substrate 26 and 28 further, and the light passed through is redistributed by it, so that the distribution of light leaving film can be more directed along the normal of film surface.In the art, optical substrate 26 and 28 is often regarded as brightness or brightness enhancing films, light resets to film and directional diffusion film.Enter LC module 12, light through the combination of this optical thin film, its space distribution on the plane domain of LC module 12 is uniform, and it has great vertical light line strength.

The major function of brightness enhancing films 26 and 28 is improve the brightness of whole backlight module.The effect of brightness enhancing films is increased with the light quantity of emitted at small angles to display axle with the light quantity that greater angle sends by minimizing.Therefore, when people watch a display attentively with the increase being relevant to the angle of this axle, the brightness obtained will be decay.Between 35 and 45 degree, the brightness obtained will decay quickly.This effect is called as sharp cut-off (SharpCut-off).

In backlight LCD 10, brightness increase film 26 and 28 can use longitudinal prismatic structure to guide light along watch axle (that is, this display vertical), its increase this display user see the brightness of light, and allow this system to use less power to produce the coaxial-illuminating of wishing position standard.Brightness enhancing films 26 and 28 has optical input surface that is level and smooth or light face, and through thus, light can enter from backlight module.Therefore, many LCD then can use two brightness enhancing films layers (LCD as at figure), its axle around vertical thin-film plane and rotating related to each other, so that longitudinal spike in individual membrane layer or concave bottom can be 90 degrees to each other, thus carry out collimated ray along two planes of vertical light output surface.

When the light face basal surface of brightness enhancing films 26 is more than the patterned surface of other brightness enhancing films 28, optical interaction between surface, the light face of top brightness enhancing films 26 and the patterned surface of bottom brightness enhancing films 28 and/or surface, light face, it can produce undesirable visible artificial false shadow in show image, it is in observable interference grating form (that is, bright and dark repeat patterns) in show image.These bright and dark patterns also can be generated only between brightness enhancing films 26 and LC module 12 adjacently situated surfaces that there is not upper diffusion film 22 (Fig. 1).Result from defect and heteropically do not wish image impact effect, for example interference grating, truncation effect (rainbow line), physical imperfection, fluid, stress etc., it is can cover (such as, at the diffusion film 22 of the brightness enhancing films more than 26 of Fig. 1) by the upper diffusion barrier of use.

Under the display quality without the need to compensating LCD, being used for reducing LCD power dissipation, the needs of thickness and weight then can increase.So the thickness of the power dissipation of backlight module, weight and thickness and all smooth films then must be reduced.In this regard, many light bootstrap techniques can be developed, with the lower minimizing power dissipation at not compromise display brightness.Some research and development then can be directed into the design (that is, at the project organization of Fig. 1 backlight film group 14 assembly, comprise light source 16 and reflector plate 20 and light guide plate 18) of backlight film group, to improve whole light output performance.In addition, other development then can be directed into diffusion film 22 and 24 and lightness/brightness enhancing films 26 and 28.

Up to now, in order to reduce the whole thickness of the optical thin film at LCD, many effort can be implemented to reduce the number of optical thin film, from four films (such as, optical thin film 22,24,26 and 28) in FIG to three films.In this regard, a kind of mode for low diffusion film 24 and low-light level enhanced film 28 are maintained discrete structure, but the function of top diffusion film 22 and top brightness enhancing films 26 then can combined with merge into single mixed film structure.This three membranous types state display can be adopted in portable electronic devices and notebook computer widely, and at this, promoting the overall dimensions that this shell reduces this little device is make us especially wishing.

All effort also can be carried out, to research and develop hybrid brightness enhancing films.With reference to figure 2, United States Patent (USP) case the 5th, 995, No. 288 disclose a grain coating, and it is relevant to the patterned surface on this top side and is provided on the bottom side of this optical substrate, on the opposition side of this substrate.Surface, light face is no longer present on the bottom side of optical substrate.The particle added can obtain the effect making light scattering, spreads for light.With reference to figure 3, United States Patent (USP) case the 5th, 598, No. 280 are disclosed a kind of diffusion by optics and on optical substrate bottom side, form little projection to improve the method for the unevenness of brightness.This little DIFFUSION TREATMENT will hide many interference gratings, can't see them to make user.A wherein shortcoming of these methods is that light scattering can reduce coaxial gain.In addition, in the viewing angle of hope, guide light online, mixed brightness enhanced film also can be more invalid.

Other people have investigated the structure of the prism surface of the patterned surface of amendment optical substrate.Such as, with reference to figure 4A and 4B, United States Patent (USP) case the 6th, 798, No. 574 provide trickle protrusion on the prism surface of the patterned surface of optical substrate, and its hypothesis wider angle can propagate light in particular directions.

So all aforesaid mixed brightness enhanced film comprise by the light output direction weakened.In addition, the whole brightness of previous film or brightness then can obviously reduce.Moreover all above-mentioned mixed brightness enhanced film comprise the suitable labyrinth of the quite higher manufacturing cost of needs.

Because the composite membrane being used in portable electronic devices is thinner, product has not good rigidity and some undesirable phenomenons (such as Newton ring, absorption) easily occur.In addition, people use portable electronic devices in closely behavior, and rainbow line phenomenon easily affects display quality.Traditionally, the back side of substrate is designed to have haze to reduce above-mentioned optical defect, but briliancy also fails thereupon.

Therefore still need at present a kind of have highlight and the structure of effectively diffusion be provided and overcome the optical substrate of shortcoming of existing multifunctional optical film.

Summary of the invention

The present invention relates to the diffusion prism substrate with optical alignment and light diffusion function.More particularly, the present invention is directed to the optical substrate having a patterned surface, it is highlighted by collimated ray or brightness and strengthen the diffusion of light.

In one embodiment of this invention, optical substrate is the form of film, thin layer, panel and analog, and it is elasticity or rigid, and it has structuring prismatic surface and relative structuring biconvex faces.In one embodiment, structuring biconvex faces comprises shallow toroidal lens structure (such as convex lens).Adjacent shallow toroidal lens structure is continuous or discontinuous, or fixing or variable interval separated by one.This lens arrangement has the vertical structure having even or variable cross section.This biconvex lens can have horizontal serpentine structure.Adjacent straight or sinuous biconvex lens fragment, it can intersect each other or partially or completely overlap.In a further embodiment, this biconvex lens is biconvex fragment but not the form of continuous structure between the opposite edges of optical substrate.This biconvex fragment can have rule, symmetric shape or irregular, asymmetric shape, and it can intersect or overlap.The surface of biconvex lens comprises biconvex section, and it can be structured, to affect diffusion further.

In further aspect of the present invention, shallow toroidal lens structure can provide has independent ripple, and it is the form of single node or a series of node.

According to the present invention, this patterned surface provides optical alignment and optics diffusion characteristic, it can clearly not reduce under whole brightness, reduce specific undesirable optics school fruit, such as adsorb (wet-out), Newton ring, interference grating and truncation effect (rainbow line) etc.

Another object of the present invention discloses a kind of method forming concaveconvex structure on substrate, the method includes the steps of: use a hard instrument to thrust (penetrate) mould by a control system, sequentially to depict multiple groove on the surface at one of this mould, wherein this hard instrument has a shape and makes the transverse direction of each this groove (transverse) width thrust the increase of the degree of depth along with this hard instrument and increase, wherein depict the plurality of groove by following steps: maintain this hard instrument along one first straight line on a first direction to delineate one first groove along this first direction, and maintain this hard instrument along one second straight line to delineate one second groove along this first direction, wherein this second straight line parallel this first straight line in the first direction, wherein be enough to block this first groove along the horizontal direction of this second groove by the transverse width increase of thrusting this second groove that the degree of depth controls of this hard instrument, make this first groove be separated (separate) by this second groove and become multiple groove (notch), and use this surface imprint film on the substrate of this mould, to form this concaveconvex structure on the substrate.

In one embodiment of this invention, this substrate is an optical substrate, and wherein this optical substrate has an optical input surface and a light gasing surface, and this concaveconvex structure is formed on this optical input surface of this substrate.

In one embodiment of this invention, this concaveconvex structure is a lens arrangement.

In one embodiment of this invention, this concaveconvex structure is a prism structure.

The invention also discloses the another kind of method forming a concaveconvex structure on a substrate, comprise following steps:

A hard instrument is used to thrust a mould by a control system, sequentially to depict multiple groove on the surface at one of this mould, wherein this hard instrument has a shape and makes the transverse width of each this groove thrust the increase of the degree of depth along with this hard instrument and increase, wherein, one first groove in the plurality of groove and one second groove is depicted by following steps:

Maintain this hard instrument along one first straight line on a first direction to delineate one first groove along this first direction; And maintain this hard instrument along one second straight line to delineate one second groove along this first direction, wherein this second groove then this first groove delineation, and this second straight line parallel this first straight line on this first direction, wherein be enough to block this first groove along the horizontal direction of this second groove by the transverse width increase of thrusting this second groove that the degree of depth controls of this hard instrument, make this first groove be separated into multiple groove by this second groove; And use the part impression film on the substrate on this surface of this mould, to form this concaveconvex structure on the substrate, wherein this part on this surface of this mould does not comprise last groove in the plurality of groove.

In one embodiment of this invention, the part that is not truncated of the plurality of first groove is to should multiple fragments of concaveconvex structure.

In one embodiment of this invention, this concaveconvex structure is included in space between the plurality of fragment or flat board, and this space or dull and stereotyped corresponding this at this mould do not delineate the region of the plurality of groove on the surface.

In one embodiment of this invention, at least one fragment is biconvex fragment.

The invention also discloses a kind of method of Mold Making, comprise following steps:

A hard instrument is used to thrust a mould by a control system, sequentially to depict multiple groove on the surface at one of this mould, wherein this hard instrument has a shape and makes the transverse width of each this groove thrust the increase of the degree of depth along with this hard instrument and increase, wherein, the plurality of groove is depicted by following steps:

Maintain this hard instrument along one first straight line on a first direction to delineate one first groove along this first direction; And maintain this hard instrument along one second straight line to delineate one second groove along this first direction, wherein this second straight line parallel this first straight line on this first direction, wherein be enough to block this first groove along the horizontal direction of this second groove by the transverse width increase of thrusting this second groove that the degree of depth controls of this hard instrument, make this first groove be separated into multiple groove by this second groove.

The invention also discloses the method for a kind of formation one blooming, comprise following steps:

One substrate with an optical input surface and a light gasing surface is provided;

This optical input surface of this substrate forms a concaveconvex structure, this concaveconvex structure is in order to diffuse into the light of this blooming, wherein form this concaveconvex structure by following steps: use a hard instrument to thrust a roller by a computer numerical control system, sequentially to depict multiple groove on the surface at one of this roller, wherein each this groove is delineated along a first direction, wherein when each this groove is when delineating, this hard instrument is not extracted out and away from this roller, wherein this hard instrument has a shape and makes the transverse width of each this groove thrust the increase of the degree of depth along with this hard instrument and increase, wherein, one first groove in the plurality of groove and one second groove is delineated: maintain this hard instrument along one first straight line in the first direction with along this first direction delineation one first groove by following steps, and maintain this hard instrument along one second straight line to delineate one second groove along this first direction, wherein this second groove then this first groove delineation, and this second straight line parallel this first straight line on this first direction, wherein be enough to block this first groove along the horizontal direction of this second groove by the transverse width increase of thrusting this second groove that the degree of depth controls of this hard instrument, make this first groove be separated into multiple groove by this second groove, and use the part on this surface of this mould impression film on the substrate to form this concaveconvex structure on the substrate, wherein this part on this surface of this mould does not comprise last groove in the plurality of groove, and,

The light output face of this substrate forms a prism structure.

Concaveconvex structure has following advantage: (a) backlight can not fail to reach the luminance gain of optimization effectively through concaveconvex structure; B () can avoid the Moore line caused by the prism structure of rule; C () changes over the curved-surface structure of two dimension effectively to increase range of scatter and shielding (screening) character of blooming by the lens arrangement of one dimension.

Accompanying drawing explanation

Fig. 1 is LCD structure of the prior art;

Fig. 2 to 4 is that mixed brightness of the prior art strengthens optics and diffusion substrate;

Fig. 5 is the structure of LCD, and it merges this optical substrate according to an embodiment of the present;

Fig. 6 a is the schematic perspective views with the optical substrate on structured light constrained input surface designed by an embodiment of the present invention;

Fig. 6 b to Fig. 6 d is a sectional view of the optical substrate of Fig. 6 a;

Fig. 7 a to Fig. 7 f display is incident on the comparative parameter study of the candle light distribution curve with the Lambertian source of not sharing the same light on the optical substrate on constrained input surface;

Fig. 8 is the sectional view of biconvex faces structure;

Fig. 9 a and Fig. 9 b is the biconvex faces structure designed by the embodiment of the present invention;

Figure 10 a and Figure 10 b is the biconvex faces structure designed by another embodiment of the present invention;

Figure 11 a and Figure 11 b is the biconvex faces structure designed by another embodiment of the present invention;

Figure 12 a and Figure 12 b is the biconvex faces structure designed by another embodiment of the present invention;

Figure 13 a and Figure 13 b is the biconvex faces structure designed by the further embodiment of the present invention;

Figure 14 a to Figure 14 f is the biconvex faces structure designed by another further embodiment of the present invention;

Figure 15 a to Figure 15 f is the biconvex faces structure designed by the further embodiment of the present invention;

The biconvex faces structure of Figure 16 a and Figure 16 b designed by another embodiment of the present invention;

Figure 17 is the synoptic diagram of the biconvex fragment designed by one embodiment of the invention;

Figure 18 a to Figure 18 d is the synoptic diagram of the biconvex fragment designed by another embodiment of the present invention;

Figure 19 a to Figure 19 d is the synoptic diagram of the biconvex fragment designed by the further embodiment of the present invention;

Figure 20 a to Figure 20 d is the synoptic diagram according to the biconvex fragment of the present invention still designed by another embodiment;

Figure 21 a is the synoptic diagram of the biconvex fragment designed by the further embodiment of the present invention;

Figure 21 b is the SEM photo of the biconvex fragment of Figure 21;

Figure 22 a to Figure 22 d is the node biconvex structure designed by the embodiment of the present invention;

Figure 23 a to Figure 23 c is the ripple biconvex structure designed by one embodiment of the invention;

Figure 24 a and Figure 24 b are the photo that optical substrate compares truncation effect;

Figure 25 is the electronic installation comprising the LCD merging optical substrate of the present invention designed by one embodiment of the invention;

Figure 26 to Figure 30 illustrates the top view forming a part of groove on the mold surface in different embodiments of the invention, wherein shows the opposite edges of each groove for convenience's sake;

Figure 31 a is the top view of the groove of Figure 26 to Figure 29, and wherein this groove has first longitudinal axis do not fallen between its opposite edges;

Figure 31 b is the top view of the groove of Figure 30, and wherein this groove has first longitudinal axis fallen between its opposite edges;

Figure 32 a is the three dimensions schematic diagram of mould, and wherein this mould has the multiple grooves on its surface;

Figure 32 b is the top view of Figure 32 a;

Figure 32 c is the three dimensions schematic diagram of substrate, and wherein this substrate has the concaveconvex structure thereon formed by an impression film thereon;

Figure 32 d is the top view of Figure 32 c.

Description of reference numerals: 10-backlight liquid crystal display; 12-LCD MODULE; 14-backlight module; 16-linear light sorurce; 18-light guide plate; 20-reflector plate; The upper diffusion film of 22-; Diffusion film under 24-; 26-optical substrate; 28-optical substrate; The reflection of 30-light and/or scattering surface; 50-optical substrate; 51-irrigation canals and ditches; 52-structuring biconvex faces; 53-basalis; 54-structuring prismatic surface; 55-biconvex layer; 56-biconvex lens; 57-layers of prisms; The longitudinal prism of 58-; 59-Guan Ding; 60-spike; 62-the lowest point; 70-optical substrate; 72-biconvex structureization surface; 74-structuring prismatic surface; The shallow curved surface convex lens of 76-; 78-prism; 86-isolates node; 100-liquid crystal display; 110-liquid crystal display; 112-LCD MODULE; 114-backlight module; 116-linear light sorurce; 118-light guide plate; 120-reflector plate; 126-Structured optical substrate; 128-Structured optical substrate; 170-optical substrate; 172-structuring biconvex optical input surface; The shallow curved surface convex lens of 176-; 185-ripple; 186-node; 510-basalis; 510 '-basalis; The longitudinal prism of 512-; 520-biconvex lens; 520 '-biconvex lens; 520 "-biconvex lens; 522-circle; 524-convex curved surface; 524 '-surface; 524 "-structuring biconvex faces; 525-biconvex lens; 526-biconvex lens; 527-biconvex lens; 528-biconvex lens; 528 '-biconvex lens; 529-biconvex lens; 529 '-biconvex lens; 530-biconvex fragment; 532-biconvex fragment; 534-biconvex fragment; 535-biconvex fragment; 536-biconvex fragment; 550-optical substrate; 551-optical substrate; 552-optical substrate; 553-optical substrate; 554-optical substrate; 555-optical substrate; 556-optical substrate; 556 '-optical substrate; 557-optical substrate; 557 '-optical substrate; 558-optical substrate; 559-optical substrate; 560-optical substrate; 561-optical substrate; 2001-groove; 2002-groove; 2003-groove; 2004-groove; 2005-groove; 2006-groove; 2006A-position; 2006B-position; 2007-groove; 2008-groove; 2009-groove; 2009A-position; 2010-groove; 2011-groove; 2013-groove; 2014-groove; 2051-first longitudinal axis; 2055-mould; 2061-part; 2062-interval; 2063-First Line; 2056-substrate; 2066-fragment.

Embodiment

Originally be illustrated as and implement current best consideration pattern of the present invention.The present invention is with reference to all embodiments and graphic and be illustrated in this.The generation of this explanation in order to show General Principle of the present invention, itself and should not perform in a limiting sense.Have the knack of this operator will appreciate that, do not departing under the scope of the invention and spirit, change can come due to these theories with improvement.Protection scope of the present invention is with reference to right and by best understanding.

The present invention relates to the diffusion prism substrate with optical alignment and light diffusion function.More particularly, the present invention is directed to have and to be highlighted by collimated ray or brightness and strengthen the optical substrate of patterned surface of light diffusion.In an aspect of the present invention, this optical substrate optically substrate is the form of film, thin layer, panel and analog, and it is elasticity or rigid, and it has structuring prismatic surface and relative structuring biconvex faces.According to the present invention, this patterned surface provides light diffusion characteristic, and it can reduce specific undesirable optics school fruit under obviously not reducing the prerequisite of total brightness, such as absorption (wet-out), Newton ring or interference grating.

In the context of the present invention, optical substrate provided by the invention can be applicable to have in the display device of display panel, and it is smooth or bending and rigid or elasticity, and it comprises any array of display pixels.Planar light source refers to provides illumination to cover array of display pixels region.So with regard to having the display panel of the bending image plane of display pixel (this little panel is rigid or elasticity), this backlight will cover the array of display pixels in flexure plane, arrive this bending image plane effectively to provide illumination zone.

Embodiment shown in combination is further illustrated as follows by the present invention.

Fig. 5 is the example of flat-panel displays.Backlight LCD designed by an embodiment of the present invention, it comprises liquid crystal (LC) display module 112, the planar light source of 114 forms and many optical thin films of being sandwiched between LC module 112 and backlight module 114 in backlight module.LC module 112 comprises the liquid crystal be sandwiched between two transparency carriers, and the control circuit of definition two-dimensional array.Backlight module 114 provides planar light to distribute, and the back of the body that wherein light source extends in a plane enters formula kenel, or as shown in Figure 5, its linear light source 116 is arranged on the side entering type kenel on light guide plate 118 edge.Reflector plate is provided to guide light to enter light guide plate 118 from linear light sorurce 116 via light guide plate 118 edge.The structure of light guide plate (such as, have taper or surface plate and light and to reflect and/or scattering surface is defined within the basal surface of face away from LC module 112), to distribute and to guide light through the top planar surface towards LC module 112.Reflector plate 120 can be provided to promote to catch flee from through light guide plate 118 bottom side and reboot back towards the light of light guide plate 118.

In illustrated embodiment, have two Structured optical substrates 126 and 128 (it is structurally similar) according to the present invention, it arranges together with usual longitudinal prism structure orthogonal between two substrates.In Figure 5, two substrates 126 and 128 are summarily shown, its display present prism structure on substrate parallel to each other (that is, comprise angle [alpha]=0 °; Also visible Fig. 6 a).Substantially, the angle that prism structure can be greater than 0 ° is rotated, and it can not need to be manifested under display further.Structured optical substrate 126 and 128 can by framework, with diffusing light and highlight or brightness, reduces the light output of this display.Enter the light of LC module 112 through the combination of this optical thin film, it can distribute by the space uniform on the plane domain of LC module 112, and it has great normal light intensity.This Structured optical substrate 126 and 128 can eliminate the demand of fan diffuser thin layer out of the ordinary between LC module 112 and upper Structured optical substrate 126.This can reduce the whole thickness of LCD110.In addition, the interference grating that Structured optical substrate 126 and 128 designed according to this invention can reduce between substrate and produce between upper substrate and adjacent LC module 112.Or, according to the present invention, only have an optical substrate 126 and 128 to need to be structured (such as, only having upper optical substrate 126), to provide acceptable interference grating position standard and optics diffusion effect.Or, only have an optical substrate 126 and 128 can be provided in LCD110.

When backlight module 114 to be placed on light source 116 light guide plate panel 118 edge shows time, do not deviating under scope of the present invention and spirit, backlight module can be the configuration of another kind of light source, such as is placed on the LED array on light-guide edge, or the LED planar array of alternative light guide plate.

When shown LCD110 embodiment does not comprise extra pure fan diffuser film, do not deviating under the scope of the invention and spirit, the optical thin film in LCD110 can comprise in selectivity and/or lower fan diffuser film.In other words, replace the brightness enhancing films 26 and/or 28 in LCD10 shown in Fig. 1 to make the present invention be modified further, it also within the scope of the present invention.It should be noted that fan diffuser film or layer can be differentiated with optical substrate, strengthen (that is, at brightness discussed below or brightness enhancing films) for brightness, wherein this fan diffuser film does not have prismatic structures.Such as in the situation of brightness enhancing films, substitute the main light that guides to highlight in the direction leaving display, fan diffuser film mainly makes light scattering and dispersion.

Optical substrate provided by the invention has prismatic structures and biconvex structure on the opposite side, and it can by framework to highlight and diffusing light.Particularly, the optical substrate shown in Fig. 5 comprises opposed configurationization designed according to this invention surface, the light redistribution that its diffusing light and making passes through, so that the distribution of light leaving film can be more directed along the normal of this film surface.

Fig. 6 a for designed by an embodiment of the present invention by the prismatic optical substrate be combined in biconvex structure on substrate opposite side, it can be used as the Structured optical substrate 126 and/or 128 in the LCD110 of Fig. 5 by use.Optical substrate 50 has structuring biconvex faces 52 and a structuring prismatic surface 54.In embodiment shown here, this structuring prismatic surface 54 is light output surface, and this structuring biconvex faces 52 is optical input surface.

Prismatic surface 54 comprises the discontinuous of parallel columns or continuous vertical to prism 58, and it extends between two opposite edges of substrate 50.In the embodiment of Fig. 6 a, longitudinal prism 58 by laterally (shoulder to shoulder) arranged in parallel, to define parallel spike 60 and the lowest point 62.In the present embodiment, the cross section of spike 60 is cutd open figure and is relevant to spike and symmetry (watching with x-z face).This spike drift angle is right angle, and in the plane of whole prismatic surface 54, and this spike has fixing or similar height and/or this lowest point has fixing or similar depths.In the embodiment of shown Fig. 6 a, the distance between adjacent peaks/the lowest point or pitch are fixing.

Conveniently reference, orthogonal x, y, z coordinate system will be adopted on all directions of explanation below.With regard to the embodiment shown in Fig. 6 a, x-axle is on the direction through spike 60 and the lowest point 62, and it is similarly regarded as transverse direction or the horizontal direction of prism 58.Y-axis is orthogonal with x-axis, on the whole the upper longitudinal axis for prism 58 or direction.The longitudinal direction of prism 58 is that spike 60 proceeds to the general direction of another end points from prism 58 1 end points.This prismatic surface 54 is positioned at x-y face.With regard to an optical substrate rectangular sheet, x and y-axle is by the orthogonal edges along this substrate.Z-axle is orthogonal with x and y-axle.The edge of the transversely arranged row end points of display prism 58 is positioned on x-z face, and as shown in Figure 6 a, it also similarly represents the sectional view on x-z face.Prism 58 each all on x-z face, there is fixing cross-section profile.The cross section of reference prism 58 along on all positions of y-axle, the cross section that x-z face captures.Moreover, to the reference frame of horizontal direction on x-y face, and be then along z-direction to the reference of vertical direction.

Biconvex structure surface 52 comprises a shallow toroidal lens structure (such as, convex surface or concave lens structure, or convex with recessed combination).Especially, biconvex structure surface 52 comprises the biconvex lens 56 of level, discontinuous or continuation column, and each x-direction all continuously between two of substrate 50 opposite edges extends.The curved surface of neighboring lenticule can intersect, to define parallel irrigation canals and ditches 51 and hat top 59.With regard to biconvex lens 56, y-axle is in the direction through irrigation canals and ditches 51 and hat top 59, and it is considered as transverse direction or the horizontal direction of biconvex lens 56 equally.X-axle represents the longitudinal axis or the direction of biconvex lens 56.The longitudinal direction of biconvex lens is hat top 59 proceeds to another end points general direction from an end points of biconvex lens 56.The edge of the transversely arranged row end points of display biconvex lens 56, it is positioned at y-z face, and as shown in Figure 6 a, it similarly represents the sectional view in y-z face.Biconvex lens 56 each all there is a constant cross-section cut open figure in y-z face.Be in the cross section captured in y-z face on all positions of x-axle to the reference in biconvex lens 56 cross section.Moreover, to the reference frame of horizontal direction on x-y face, and to the reference frame of vertical direction along z-direction.

Same reference diagram 6b to Fig. 6 d, its display is along x-axle, y-axle and the sectional view that captures with the angle 45 degree to x and y-axis.In the embodiment shown; in whole optical substrate structure; structuring prismatic surface 54 and structuring biconvex faces 52 generally parallel to each other (that is; total substrate structure can not be formed; it usually can by change taper; just as the light guide plate panel in backlight module, or it is concave surface or convex surface).In the embodiment shown, substrate 50 comprises three walls, and it comprises the first structured layer 57 of the prismatic surface supporting prism 58, the second structured layer 55 of biconvex faces supporting biconvex lens 56 and the mid-plane basalis 53 of supporting layer 55 and 57.These two structured layers 55 and 57 are attached to basalis 53, to form total optical substrate 50.Do not deviating under the scope of the invention and spirit, optical substrate can be formed from single long-pending body physical material layer, but not three Physical layers separated.Optical substrate 50 is single or monoblock body, and it comprises the base part of the surface structure of carrying prism and biconvex lens.

Structured prismatic surface 54 has multiple triangular prism 58 in a sectional view of Fig. 6 b captured along x-z face.Structuring biconvex faces 52 has multiple bending convex lens 56 in a sectional view of Fig. 6 c captured along y-z face.Triangular prism 58 inclines towards each other dependence, and to define discontinuous or continuous prismatic structures surface 54, biconvex lens 56 inclines towards each other dependence equally simultaneously, to define discontinuous or continuous biconvex structure surface 52.Biconvex structure surface 52 contributes to diffusion function and can reduce specifically not wishing optics school fruit, such as absorption (wet-out), Newton ring and interference grating.

In the embodiment shown in Fig. 6 a, the longitudinal direction of biconvex lens is vertical with the longitudinal direction of prism.Biconvex lens and the longitudinal direction of prism can be different angle α carry out framework.Angle α scope, from 0 ° to 90 °, is preferably 45 ° to 90 °, to carry out to light the optical substrate that diffusion preferably obviously can not reduce total brightness simultaneously.Angle is for 90 ° to provide good performance.

In the embodiment shown, biconvex layer 55 and layers of prisms 57 are made from the same material or a different material, and this basalis 53 is made from the same material or a different material.Biconvex layer 55 and layers of prisms 57 can use transparent optical layer to be formed, and are preferably polymerizing resin, such as ultraviolet light or visible radiation hardening resin, such as ultraviolet light photopolymerization adhesive agent.Generally speaking, this structuring is prismatic with biconvex faces 56 and 58, and it is by comprising can being applied to primary module or main drum and standing a sclerosis processing procedure and formed by coating compound of polymerism and crosslinkable resin.Such as, to be prismaticly formed on basalis 53 by die component, nip drum machinery, mold pressing assembly or other equivalent apparatus with biconvex structure.Basalis 53 is made up of transparent material, such as ethylene terephthalate (PET), tygon (PE), polyethylene terephthalate (PEN), polycarbonate (PC), polyvinyl alcohol (PVA) (PVA) or Polyvinylchloride (PVC).Basalis 53 can be made up of the transparent material identical with structured layer 55 and 57 on the contrary.Basalis 53 provides necessary thickness, with the last film providing structural intergrity to arrive optical substrate 50.

In another embodiment, prismatic structures surface 54 enter by mold casting forming, extruding, embossing, list or extrusion molding on transparent substrates film, the biconvex faces 52 of structuring simultaneously can be separately fabricated on transparent base layer 53 by the ultraviolet light photopolymerization with resin.

Be used for being formed the further discussion of the process of the substrate with patterned surface, it can with reference to United States Patent (USP) case the 7th, and 618, No. 164, it is incorporated into this by reference.

In another embodiment, structuring biconvex faces 52 enter by mold casting forming, extruding, embossing, list or extrusion molding one-body molded on well-illuminated basalis 53, the prismatic surface 54 of structuring simultaneously can be separately fabricated on transparent base layer 53 by the ultraviolet light photopolymerization with resin.

In a further embodiment, prismatic structures surface 54 can be overall or be respectively formed on substrate film, and this structuring biconvex faces also can be overall or be respectively formed on another substrate film simultaneously.These two substrate films are by will for example pressure adhesive agent storehouse or be applied to film adjoining land combines to form the structure of equal basalis 53 simply that becomes adhesive agent (PSA).Be apparent that, the combination of many technology and manufacture method can be employed, to obtain the combination of this structuring prismatic surface, this structuring biconvex faces and this basalis or its equivalent.

The size of optical substrate is generally as follows, such as:

The thickness of basalis 53 is that some tens of pm is to several millimeters;

The peek height of prism (measured from the adjacently situated surfaces of basalis, if or basalis and the integrated words of prism, measured from the lowest point between adjacent non-crossing prism) be tens of to hundreds of micron;

The distance at distance from bottom basalis top, prism the lowest point is about 0.5 to hundreds of micron;

The drift angle of prism spike is about 70 to 110 degree;

The peak-to-peak pitch of adjacent prisms point is tens of to hundreds of micron;

The hat heights of roofs of biconvex lens (measured from the adjacently situated surfaces of basalis, if or basalis and the integrated words of biconvex lens, measured from the lowest point between non-crossing adjacent lens) be 1 to 300 micron

Pitch between adjacent hat heights of roofs is 10 to hundreds of micron.

Optical substrate designed according to this invention can use with the LCD being configured for display, such as, for the portable equipment of TV, notebook computer, display, mobile phone, digital camera, PDA and analog, to make display brighter.

Biconvex faces 52 then can be observed with reference to figure 7a to Fig. 7 f with the effect of prismatic surface 54 and their reciprocation of all optical substrate frameworks.Fig. 7 a to Fig. 7 f display is incident on the comparative parameter study of the candle light distribution curve with the Lambertian source of not sharing the same light on the optical substrate on constrained input surface.In the candle light distribution of curve representative in X-direction of solid line, and distribute at the candle light of curve representative in Y-direction of dotted line.With regard to the example shown in Fig. 7, X-direction is level and Y-direction enters the page.

When Fig. 7 a is presented at and there is not any optical substrate, for the candle light distribution curve of Lambertian source.Identical with being distributed as in Y-direction at X.

Fig. 7 b display Lambertian source is incident on the result on plane P ET film.This candle light distribution curve and Fig. 7 a essence similar.

Fig. 7 c is presented at without any under biconvex structure, and Lambertian source is incident on the result on optical substrate, light output that it has surface in the Y direction in there is the form of the one-dimentional structure prismatic film of the prism longitudinal axis.This candle light distribution curve refers to the obvious enhancing distributed on main X-direction.This is by improving brightness by from optical input surface to the collimate light on light output surface in the coaxial direction.With the triangular structure of the prismatic output surface of this optical substrate, light can by being reset during this optical thin film in X-direction.

Fig. 7 d shows Lambertian source and is incident on result on the optical substrate with one dimension biconvex structure film, the longitudinal axis that wherein this biconvex leads to mirror ties up to-direction on.Candle light distribution curve refers to light when dispersing in x-direction by during biconvex film.

Fig. 7 e display Lambertian source is incident on the result on the optical substrate with structuring biconvex optical input surface and the prismatic light output surface of structuring.The longitudinal axis of two patterned surfaces rotates in 90 ° related to each other, and it has the longitudinal axis of prism on Y-direction.The instruction of this result in x-direction more strengthen light and the more divergent rays on Y-direction (that is, diffusion).

Fig. 7 f display Lambertian source is incident on the result on another optical substrate with structuring biconvex optical input surface and the prismatic light output surface of structuring.The longitudinal axis of two patterned surfaces rotates in 0 ° related to each other, and both are all in Y-direction.This result instruction strengthen light and in the same direction disperse/diffusing light.

According to above comparative study, biconvex optical input surface meeting divergent rays, to produce diffusion, and the mode that prismatic light output surface can be then scattering and refraction strengthens light in the coaxial direction.

In another embodiment of the invention, at least some biconvex lens can not intersect each other, and makes adjacent convex bending lens surface not connected or discontinuous.The sectional view (with Fig. 6 b identical faces) of optical substrate 550 of Fig. 8 for seeing in y-z face.Optical substrate 550 comprises basalis 510 and has convex curved surface 524 and be formed in the multiple biconvex lens 520 on the top surface of basalis 510 and be formed in the longitudinal prism 512 (similar prism 58) on the top surface of basalis 510.The surface portion of the surface 524 essence Correspondent cy linder 522 of each biconvex lens 520, its center on cross section is 〝 O 〞, radius is 〝 r 〞, the corresponding diagonal angle θ of its surface portion and put on cross section between 〝 a 〞 and 〝 b 〞 to arc.In the sectional view shown in figure, a section of the corresponding circle 522 of lens 520, it is by string a-b and arc a-b deckle circle.As shown in Figure 8, compared to Fig. 6 b, the adjacent curved surfaces 524 of biconvex lens 520 do not contact with each other to be formed be connected or continuous lens surperficial.In the present embodiment, the surface 524 rebasing 〞 of 〝 of each lens 520 is on the top of basalis 510, and it has flat interval between adjacent lens.In the present embodiment, with regard to discontinuous lens 520, lens width pitch 1 is identical.Between adjacent discontinuous lens, spacer knobs is identical or different apart from 2.

In the preferred embodiment, the angle θ scope of biconvex structure is 5 degree to 90 degree, and preferably scope is 20 degree to 65 degree.The height (H) of biconvex lens structure (measures from the top of basalis 510, if or basalis and the integrated words of biconvex lens, from adjacent non-intersect or non-overlapping biconvex lens between the lowest point measured) equal, preferably scope is 1 μm to 100 μm, and better scope is 2 μm to 50 μm.The curvature of biconvex lens is identical.Prism 512 peek height is 5 μm to 100 μm; The pitch of adjacent prisms spike is 10 μm to 500 μm; The thickness of basalis 510 is 5 μm to 1000 μm; Pitch 1 is 5 μm to 500 μm; Pitch 2 is 1 μm to 100 μm; Distance between the O of adjacent lens center is 5 μm to 500 μm.

In the preferred embodiment, the drift angle scope of prism 512 is 70 degree to 110 degree, and more preferably scope is 80 degree to 100 degree.In another preferred embodiment, vertical height (H) scope of prism unit is 10 μm to 100 μm, and more preferably scope is 20 μm to 75 μm.Or this prism unit has or does not have same vertical height.In a further preferred embodiment, the horizontal pitch scope of this prism 512 is 10 μm to 250 μm, and more preferably scope is 15 μm to 80 μm.

Fig. 9 a is top perspective and Fig. 9 b is the sectional view (in y-z face) of another embodiment of optical substrate 551.In the present embodiment, the curvature of biconvex lens 520 ' is with identical highly respectively, and distance pitch 2 between two of this structuring biconvex faces discontinuous biconvex lens 520 ' is identical.In the present embodiment, the surface 524 ' of each lens 520 ' is not rebasing on the top of basalis 510 '.The height (H) of biconvex lens structure (measures from the top of basalis 510, if or basalis and the integrated words of biconvex lens, measured from the lowest point between neighboring lenticule) equal, preferably scope is 1 μm to 300 μm, and better scope is 2 μm to 50 μm.The curvature of biconvex lens is identical.Pitch 1 is 5 μm to 500 μm; Pitch 2 is 1 μm to 100 μm;

Another embodiment of Figure 10 a and 10b display optical substrate 552.In the present embodiment, this structuring biconvex faces 524 " two discontinuous biconvex lens 520 " between distance pitch 2, it is variable or different on whole cross section.The height (H) of biconvex lens (measures from the top of basalis 510, if or substrate and the integrated words of biconvex lens, measured from the lowest point between non-crossing neighboring lenticule) equal, preferably scope is 1 μm to 100 μm, and better scope is 2 μm to 50 μm.The curvature of biconvex lens is identical.Pitch 1 is 5 μm to 500 μm; Pitch 2 changes between 1 μm to 100 μm.

Another embodiment of Figure 11 a and Figure 11 b display optical substrate 553.In the present embodiment, the vertical height (H) of the structure of biconvex lens 525 is variable.Moreover, the radius-of-curvature of different biconvex lens 525 also alterable and/or different biconvex faces meets different cross section than circular (such as, the ellipse of rule or random geometry or other cross section) and varying sized cylindrical further.Longitudinal biconvex structure of uniform cross-section with other convex curved surfaces sections of definition also can be taken into account (such as, the identical section of different biconvex lens or different section).Pitch 1 is 5 μm to 500 μm; Pitch 2 is 1 μm to 100 μm; Highly then change to 300 μm from 0.5 μm.

Another embodiment of Figure 12 a and Figure 12 b display optical substrate 554.In the present embodiment, some adjacent biconvex lens can intersect each other or part overlaps, thus define one to be connected or continuous biconvex structureization surface, it has some biconvex lens 526 having symmetrical section (as shown in Figure 12b, y-z face being watched).The vertical height of biconvex lens 526 and curvature, it is identical respectively between the plurality of lens.Pitch 1 is 5 μm to 500 μm; Intersect scope between 1 μm to 50 μm, the edge of its overlapping neighboring lenticule.

The further embodiment of Figure 13 a and Figure 13 b display optical substrate 555.In the present embodiment, biconvex lens 527 is discontinuous (as shown in a shown sectional view) on whole y direction.The neighboring lenticule 527 of part is for connecting or being connected.Biconvex lens 527 along lens longitudinal direction (x-direction) and laterally swing in (in y-direction).In one embodiment, this biconvex structure can be regarded as comprising laterally wriggle continuous bend segment portion that longitudinal biconvex lens row and/or end points connect end points (that is, there is the part of curve in specific direction, or be generally C-type or S-type sweep), to form total portraitlandscape lens arrangement that wriggles.In one embodiment, the transverse direction of longitudinal biconvex structure wriggle row can by laterally parallel (in y-direction shoulder to shoulder) arrangement.In one embodiment, horizontal waveform is rule, and it has a fixing or variable wavelength and/or wavelength amplitude (or transversely deforming degree).This horizontal ripple general and then sinusoidal profile or other curved cutplanes.In another embodiment, horizontal ripple has any wavelength and/or wave-amplitude.In one embodiment, with regard to the adjacent lens through particular cross section plane, the vertical height of biconvex lens 527, curvature, surface section and/or width are identical respectively, with regard to the different cross section plane in x-direction along the longitudinal, and itself and fixing or change.Pitch 1 is 5 μm to 500 μm; Pitch 2 is 0 μm to 100 μm.

Figure 14 a and Figure 14 b shows the amendment of the embodiment of Figure 13 a and 13b.In the embodiment of optical substrate 556, some adjacent transverse directions wriggle biconvex lens can intersect each other or part overlap, thus on some positions of the length along each biconvex lens 528, define an adjacent or continuous biconvex faces.Those neighboring lenticule 528 intersected will have asymmestry section (as watched in the y-z face shown in Figure 14 b: similarly see Figure 12 b).Biconvex lens 528 has phase co-altitude.Other structures then with Figure 13 in similar.

Figure 14 c to Figure 14 f is presented at the transverse direction shown in Figure 14 a and 14b and wriggles the variation of biconvex lens 528.As shown in the figure, the part biconvex lens 528 ' in Figure 14 c to Figure 14 f, it can intersect each other or partially or completely overlap, thus define one be connected or continuously biconvex structureization surface on optical substrate 556 '.In fact, biconvex lens 528 ' is combined in the height variation feature of biconvex lens 528 in Figure 14 a and Figure 14 b, and in Figure 12 a and Figure 12 b the intersecting features of biconvex lens 526.As shown in the x-y face of Figure 14 d, biconvex lens 528 ' non-fully from edge to opposite edge of optical substrate 556 ' longitudinally continuously.Some biconvex lens 528 ' presents with shorter longitudinal fragment, and it has a terminal a place (such as, 580 and 581), can cover another biconvex lens 528 completely at the biconvex lens 528 ' of this part.Then can have living space between biconvex lens 528 ' or dull and stereotyped (such as, 582 and 583).

Be incorporated into the hard instrument of No. the 7th, 618,167, United States Patent (USP) case of the present invention description afterwards by reference completely to can be used for " delineation die surface is to form above-mentioned optical substrate structureization surface ".Hard instrument can be the microsize instrument (such as: lathe, milling machine and straight cuts (ruling)/planer shaping (shaping) machine) be arranged in computer numerical control (CNC) system.Concaveconvex structure in Figure 14 c to Figure 14 f depicts multiple groove on the mold surface by control system (computer numerical control system) and the film using die surface to be stamped on substrate is formed.

The biconvex lens 528 that part biconvex mirror 528 ' in Figure 14 c to Figure 14 f results from Figure 14 a to Figure 14 b overlaps; In other words, multiple groove is sequentially delineated on the face of the die, and each groove is delineated along first direction, and the part biconvex lens 528 ' then in Figure 14 c to Figure 14 f is formed by the overlapping of groove.From before shown in Figure 14 c to Figure 14 f, it is longitudinally continuous that biconvex lens 528 ' not all extend to opposite edges from an edge of optical substrate 556 '; In other words, part of trench block by other groove, make the part that part biconvex lens 528 ' (fragment) the corresponding part groove of concaveconvex structure is not truncated.

The further embodiment of Figure 15 a and 15b display optical substrate 557.In this embodiment, adjacent biconvex mirror 529 separated by an interval, and this height can change along the length of each biconvex lens in x-direction.In the embodiment shown, when height becomes along lens, cross-sections surfaces section then changes in x-direction.The sinusoidal profile of this height change usually then in rule, fixing, change or random wavelength and/or wave-amplitude or other curved cutplanes.This lens width (such as, as shown in Figure 8, the pitch 1 between a 〝 a 〞 to some 〝 b 〞) is the same for adjacent lens, itself and fix along each lens in x-direction.In alternative embodiments, with regard to one or more lens, this width also can change between adjacent lens or along x-direction.Interval (such as, pitch 2 as shown in Figure 8) between lens, it is fixing (equally in figure 9b) in the part shown in whole Figure 14 b, or is change (such as, as shown in fig. lob) in whole part.Pitch 1 is 5 μm to 500 μm; Pitch 2 is 0 μm to 100 μm; Height change scope is 1 μm to 50 μm.

Figure 15 c to Figure 15 f shows the change of the height change biconvex lens 529 shown in Figure 15 a and 15b.As shown, the longitudinal biconvex lens 529 ' in Figure 15 c to Figure 15 f can intersect each other or part overlaps, and is thus connected or continuous biconvex structureization surface in the upper definition of optical substrate 557 '.In fact, longitudinal biconvex lens 529 ' is combined in the height variation feature of the biconvex lens 529 in Figure 15 a and Figure 15 b, and the intersecting features of longitudinal biconvex lens 526 in Figure 12 a and Figure 12 b.The structure of Figure 15 c to Figure 15 f can be formed in the following manner: (a) uses a hard instrument to thrust (penetrate) mould by a control system, sequentially to depict multiple groove on the surface at one of this mould, wherein this hard instrument has a shape and makes the transverse direction of each this groove (transverse) width thrust the increase of the degree of depth along with this hard instrument and increase, wherein when each this flute is along when first direction carrying out (march), the degree of depth is thrust by repeatedly moving up and down this hard instrument with what delineate that this mould controls this hard instrument, the transverse width of each this groove is changed according to this controlled hard the thrusting the degree of depth of instrument, wherein every two adjacent grooves overlap and not interval (space) in-between completely, b () uses this surface imprint film on the substrate of this mould.When each flute is along when first direction carries out, the transverse width of flute can be caused to have maximum value and the alternately change of minimum pole by repeatedly moving up and down hard instrument, the space of flute is made to have as annelidan structure, flute is caused to have fixing transverse width compared to the fixing degree of depth of thrusting, the column structure of one dimension is changed over the link structure of two dimension by this method, thus greatly can strengthen the diffusion effect of blooming.When two grooves are along when first direction (being preferably straight line in a first direction) carrying out, the mode that the present invention is overlapped by the latter's groove and the former groove, solve the problem of " have between minimizing part simultaneously at the transverse width of the former groove and the latter's groove and there is interval ", this method can ensure by mould impress after film do not have smooth part, thus thus enhanced diffustion effect.Preferably, control (CNC) system by computer numerical uses hard instrument sequentially to depict multiple groove on the surface of roller, wherein each this groove is delineated along first direction, wherein when each this groove is when delineating, this hard instrument is not extracted out and (when hard instrument does not thrust die/roller, die/roller has unstructured surface away from this roller; But when hard instrument thrusts die/roller delineation groove, the front end of hard instrument maintains under unstructured surface always, until the front end that groove forms rear hard instrument just extract out and on unstructured surface), the column structure of one dimension is changed over the link structure of two dimension by this method, thus there is not any interval between link, and then strengthen the diffusion effect of blooming.Preferably, hard instrument (front end) has lens (lenticular) shape (as shown in Figure 8, hard front tool has arc-shaped), compared to the hard instrument having prism (prismatic) shape, mould made by delineating with the hard instrument with lens shape, thus the film after impression has better diffusion effect, but the hard instrument in the present invention is not limited to have arc-shaped, as long as there is the shape for lugs of smooth curved and the film after can reaching impression has preferably diffusion effect.Better, maintain hard instrument along the first straight line in a first direction to delineate each groove along first direction, this mode is compared and is carried out delineating groove along first direction is sinuous, not only Production Time can be shortened, mould precision can also be increased to reduce the error on making (because hard front tool has arc-shaped, so can ensure that the groove delineated on mould also has level and smooth arc-shaped, the film impressed has better diffusion effect).

Another embodiment of Figure 16 a to Figure 16 b display optical substrate 558.In the present embodiment, substitute extend past whole optical substrate in the previous embodiment continuous vertical to biconvex structure, it can be fractured into biconvex fragment.Same with reference to Figure 17, each biconvex fragment 530 is usually in lengthening, the slim-lined construction with round end.The general construction of biconvex fragment 530 is symmetrical on x-y face, its similar elliptical area fragment.The top graph of biconvex fragment 530 structure shown in Figure 17 c, its be generally symmetry, elongated, lengthen or similar flat oval structure.Figure is cutd open in biconvex fragment 530 longitudinal cross-section shown in Figure 17 a, its be generally elongated with lengthening curved surface, similar oval top.In an alternative embodiment, the plane geometric shape of biconvex fragment is asymmetric.In the present embodiment, biconvex fragment 530 can be isolated from each other or separate.The lateral cross section section of the biconvex fragment 530 shown in Fig. 7 b is generally periphery, its similar cross-section profile in embodiment a little earlier.In the present embodiment, can be observed along the vertical height (H) of each biconvex fragment and along the longitudinal x-direction changes significantly.The overall height of biconvex fragment 530 is identical.By the ratio of control surface curvature, pitch (L) and height (H), biconvex fragment 530 light that can affect in x-y face spreads (that is, along x and y direction).The size of fragment 530: length L1 is 1 μm to 5000 μm; Pitch L2 is 0.5 μm to 2000 μm; H is 0.1 μm to 500 μm.The distribution of fragment 530 is from 30% to 100% of about optical substrate covering scope.It should be noted, 100% scope means that this biconvex fragment not overlaps (such as seeing Figure 19 and following discussion).

The variation of the biconvex fragment on optical substrate structure biconvex faces of Figure 18 to Figure 21 display designed by the further embodiment of the present invention.Except biconvex fragment, the remaining structure in all embodiments can be similar with Figure 16.

Compared to the biconvex fragment 530 in Figure 16 embodiment, in the embodiment of Figure 18, on optical substrate 559, the biconvex fragment 532 of similar ellipse is asymmetric (asymmetric) on x-y face.

Compared to the biconvex fragment 530 in Figure 16 embodiment, in the embodiment of Figure 19, the biconvex fragment 534 of similar ellipse is symmetrical, but intersects each other on optical substrate 560 or part overlapping.Shown body structure surface then can provide and preferably spread.

Compared to the embodiment of Figure 19, in the embodiment of Figure 20, the biconvex fragment 535 of similar ellipse is asymmetric, and intersects each other on optical substrate 561 or part overlapping.Shown body structure surface also can provide and preferably spread.

The embodiment of similar Figure 19, in the embodiment of Figure 21, the biconvex fragment 536 of similar ellipse is symmetrical, and intersect each other on optical substrate 562 or part overlapping, but roughening or rag can be come, with enhanced diffustion effect with recess, line, crack and/or thrust etc. in the surface of biconvex fragment 536 in the present embodiment.Figure 21 b shows the SEM figure of the textured surface of biconvex fragment.The biconvex structure of other embodiments disclosed by this also can by similar rag.

Experimental result

All sample optical substrates are evaluated for angle and the refractive index effect to turbidity and gain, and the effect on interference grating.

Turbidity is measured and is carried out on simple optical substrate, and it only has biconvex lens on optical input surface, and does not have prism on the surface at relative root mean square error.Turbidity is measured (such as, the turbidity chi of the limited industrial group of NipponDenshoku, pattern number NDH-2000) by being placed on mist degree chi by each optical substrate.

The gain of sample optical substrate uses colorimeter to assess (such as, TonConBM7 YC meter), to determine to send on-axis luminance through optical substrate of the present invention from backlight, it has the prismatic light output surface of structuring and structuring biconvex optical input surface (that is prism structure and biconvex structure all appear on the opposite side of optical substrate).On-axis luminance system vertical survey sample and the light intensity sent.Data is reported with the brightness of every square centimeter of candle light (cd/m2).With regard to gain assessment, bottom diffusion thin layer can be placed in backlight, and it can be sandwiched between backlight and each sample optical substrate under assessment.Do not have other optical thin film or LC can be used in gain assessment.The brightness value of each sample optical substrate can be measured.The brightness value only with the identical backlight of same bottom diffusion thin layer can be measured.On-axis luminance yield value is expressed with the ratio of measurement brightness value of the measurement brightness value of sample optical substrate to the backlight only with lower diffusion sheet.

The interference grating effect of sample optical substrate of the present invention uses backlight to observe simply by naked eyes, and its middle layer with lower diffusion sheet thin layer is placed in backlight and prismatic brightness strengthens thin layer (without any biconvex structure on light input side) between sample optical substrate and lower diffusion sheet thin layer.

Flat ratio is the ratio of pitch 2/ (pitch 2+ pitch 1).With regard to all experiments, pitch 1 is fixing for sample optical substrate.

Experiment A:

The effect of the angle θ of table 1 is presented in gain and diffusion/turbidity (such as, the embodiment shown in similar Fig. 6 a, flat ratio is 0%) biconvex structure.Can observe, interference grating can be eliminated, and with regard to angle θ scope 16 degree to 66 degree, gain can maintain between 1.49 and 1.54.

Table 1

Experiment B:

Table 2 shows the effect (such as, in the structure shown in Fig. 6 a and Fig. 8, it has zero flat ratio) of the refractive index of biconvex structure.At larger angle θ, turbidity is higher, but gain is lower.When the refractive index of biconvex structure increases, turbidity will increase.But the gain of optical substrate will reduce.The better ranges of indices of refraction of biconvex structure is 1.45 to 1.58.

Table 2

Experiment C:

Table 3 shows when changing biconvex radius, not significant change (such as, in the structure shown in Fig. 6 a and 8, it has zero flat ratio) in turbidity and gain.But in change turbidity and gain, angle θ is obvious.

Table 3

Experiment D:

The effect of the flat ratio of table 4 display optical substrate, example embodiment as shown in Figure 9.On lower flat-ratio, optical substrate has higher turbidity, and interference grating can be eliminated.When the flat ratio of optical substrate is higher, the ability eliminating interference grating then can reduce.The better flat ratio of optical thin film is not more than 10%.

Table 4

Experiment E:

In this experiment, two optical substrates are relevant to and rotate each other, to change angle [alpha] (embodiment see Fig. 6 a).Table 5, angle [alpha] essence is 90 °, and to provide brightness enhancing films, it has the accepted diffusion presenting good gain equally.

Table 5

Known previously described embodiment and experimental result, people moderately can expect the effect of different characteristic on selection and/or integrated structure surface, not have compromise can accept reduce interference grating under diffusion and increase gain, and obtain the above other beneficial effect of the present invention.Such as, the degree of light dispersion controlled by the parameter comprising resin index (RI), biconvex lens radius-of-curvature, biconvex lens diagonal angle/highly, flat ratio etc.At integrated structure biconvex optical input surface and the prismatic light output of structuring on the surface, obviously synergy of pulling together is had, to obtain beneficial effect of the present invention.

When above-mentioned optical substrate comprises prismatic structuresization surface with relative biconvex structureization surface, diffusion can be completed, clearly can not reduce under whole brightness simultaneously, reduce specific undesirable optics school fruit, such as absorption (wet-out), Newton ring or interference grating.When biconvex structureization surface by the truncation effect (manifesting with rainbow line when blocking) perceived between dark and bright area reduce to the specific viewing of certain scope or viewing angle time, with regard to specific display application, blocking more gradually will be made us wishing.

According to another embodiment of the present invention, the biconvex structure surface of optical substrate comprises a shallow toroidal lens structure, and it has the 〝 ripple 〞 (in addition, it is even on cross section) along biconvex structure distribution.The similar node of this ripple or a series of node.The degree of light dispersion subsequently can by except resin index (RI), biconvex lens radius-of-curvature, biconvex lens diagonal angle/highly, biconvex lens diagonal angle/highly, flat ratio, and the parameter also comprising ripple density etc. controlled.

Figure 22 a to Figure 22 d shows the optical substrate 70 of the node structure biconvex faces designed by one embodiment of the invention.In the present embodiment, the structure essence of optical substrate 70 is similar illustrates optical substrate 50 as above shown in Fig. 6 a, is added on structuring biconvex faces 72 and has except the structuring prismatic surface 74 of the prism 78 alternately prism height of change except the following isolation node 86 explained further.Two structural sheets all can be supported by basalis 53.

Shallow curved surface convex lens 76 provide has ripple, and it is in the form of the predefined isolation node 86 distributed on x-direction along other continuous, even biconvex lens 76.Node 86 each all in the form of a part of endless belt around the periphery of biconvex lens 76.In a sectional view of Figure 22 a, node 86 has a convex bending cross-section profile.Light can be scattered in the longitudinal x direction parallel with longitudinal biconvex lens 76 by the predefined node 86 on structuring biconvex faces 72, and light can be scattered in the horizontal y direction vertical with longitudinal biconvex lens 76 by shallow curved surface biconvex lens, so, compared to the comparatively early embodiment of such as Fig. 6 a, the shallow toroidal lens structure with predefined node surface then can improve diffusion effect.So node 86 contributes to diffusion, itself and also can reduce and specifically do not wish optical defect, such as truncation effect (rainbow line), Newton ring and interference grating.Those nodes be several microns to hundreds of microns wide (in x-direction, with shown in Figure 22 a cross section viewing), and more than biconvex lens adjacently situated surfaces or below one micron to some tens of pm.Along biconvex lens isolation node 86 between distance, its be several microns to several millimeters.

In the present embodiment, longitudinal prism 78 has the spike that y direction along the longitudinal replaces between both heights (about 3 μm of difference in height).Prism structured surface 74 is by improving brightness by the collimate light be incident on structuring biconvex lens to emit beam in the coaxial direction.

Triangular prism 78 dependence adjacent one another are, to define continuous or continuous prismatic structuresization surface, this shallow toroidal lens 76 also can adjacent one another arely rely on simultaneously, to define continuous or continuous biconvex structure surface 72.As in embodiment a little earlier, the angle α that biconvex lens 76 and the longitudinal direction of prism 78 can be different carrys out framework.Angle α scope, from 0 ° to 90 °, is preferably 45 ° to 90 °, to provide the optical substrate having and obviously can not reduce total brightness while that the ability of satisfaction carrying out diffusing light.Angle α is for 90 ° to provide better performance.The manufacture of optical substrate 70 comprises as the similar manufacturing process in embodiment a little earlier.

Another embodiment of Figure 23 a to Figure 23 c structured biconvex faces, compared to the preceding embodiment shown in Figure 22, it has the ripple 185 of similar a series of neighboring node 186 on the structuring biconvex optical input surface 172 of optical substrate 170.Except ripple 185, in the remaining structure of optical substrate 170 and Figure 22 embodiment, optical substrate 70 is similar.Particularly, the shallow curved surface convex lens 176 of micro-curved surface provide has isolation predefined ripple, and it is the form that a series of node 186 distributes on x-direction along other continuous, even biconvex lens 176.In the present embodiment, ripple 185 can be formed in other even longitudinal biconvex lens 176 by this number of Node 186, and it comprises the connected node 186 (watching with the sectional view on x-z face) of different in width and/or thickness/height.In each ripple 185, have a series of two to dozens of node.Along biconvex lens the independent ripple 185 (number of Node 186) of isolation between distance, for several microns to several millimeters.Light can be scattered in the longitudinal x direction parallel with longitudinal biconvex lens 176 by the ripple 185 on structuring biconvex faces 172, and light can be scattered in the horizontal y direction vertical with longitudinal biconvex lens 176 by shallow curved surface biconvex lens, so, compared to the comparatively early embodiment of Fig. 6 a, the shallow toroidal lens structure with predefined ripple surface then can improve diffusion effect.So ripple 185 contributes to diffusion, itself and also can reduce and specifically do not wish optical defect, such as truncation effect (rainbow line), Newton ring and interference grating.

As shown in the embodiment of Figure 23, node in each ripple 185 186 (that is, a series of node) not at phase co-altitude.Just as more obvious explicitly in Figure 23 b institute, the ripple of each biconvex lens 176 has the height become along sinusoidal curve or any other definition curve or the curve become in random/pseudorandom mode.But, the some or all of nodes in ripple are phase co-altitude.Moreover, x-z fragment is watched (that is, Figure 23 b watches), some or all ripples are similar or different.

There is provided ripple to improve diffusion characteristic in other embodiments of the biconvex structure disclosed by this, it is fully in scope of the present invention and spirit.

Experimental result

For the effect that the node biconvex lens structure of optical input surface obtains, that is truncation effect (rainbow line), it can be judged by naked eyes.Figure 24 a is the figure of the visual experience of two optical substrates being presented at certain viewing angles, in backlight (such as, diffusion sheet under photoconduction light guide plate and bottom diffuser) in background, each all only has the prismatic output surface of structuring (without any structuring biconvex optical input surface).Figure 24 b is the figure of the visual experience of two optical substrates being presented at certain viewing angles, and in backlight, each all has the optical input surface having ripple biconvex lens structure and the surface of the light output with prismatic structures.Comparison diagram 24a to Figure 24 b, perceived dark and bright between excessive (border circular areas) present more sharp-pointed blocking, adjoint by rainbow line institute during its transition at Figure 24 a, but discovered dark and bright between transition then can be more cumulative, and without any obvious rainbow line in Figure 24 b.According to these results, the shallow toroidal lens structure with predefined node obviously can reduce rainbow line effectively.

Known shallow toroidal lens structure has predefined node to provide the ability of better diffusion effect, will have more multiparameter and to control on the two dimensional surface of optical substrate the diffusion of (that is, through x-y plane).Optical substrate x in diffusion characteristic, it changes by selecting height of node and density.Diffusion characteristic in y-direction, it changes by selecting the radius-of-curvature of shallow toroidal lens and diagonal angle θ.So optical substrate can be designed, to provide suitable gain to enter formula module from turbidity to the different back ofs the body, with obtain Different L CD application in desired by display quality.

Known previously described embodiment and experimental result, people moderately can expect the effect of different characteristic on selection and/or integrated structure surface, to reduce interference grating when not compromising and can accept diffusion and to increase gain, and obtain the above other beneficial effect of the present invention.

In a further embodiment, structured prism shape light output surface comprises the height changing spike, and the predefined structuring scrambling distributed on this body structure surface.The predefined scrambling introduced is similar with resulting from the expected structure defect manufactured, for example (,) in the prism structure of patterned surface the smooth part of on-plane surface of (such as, in spike or the lowest point).Structuring scrambling can at least one mode in neat, half neat, random and pseudorandom and be distributed in total light output on the surface.The predefined scrambling be introduced into into this structured light output surface can cover the perceptible defect of specific user, and it is not deliberately included in caused by the structural defect in this structured light output surface by from manufacture processing procedure.With further reference to United States Patent (USP) case the 7th, the defect screening effect of the predefined structuring scrambling in 883, No. 647, it generally assignedly can give the surrenderee of subject application, itself and be incorporated to completely by reference at this.

In another embodiment, this structuring prismatic light output surface can replace or comprise irregular prism structure in addition, just as in U.S. patent application case the 7th, 618, disclosed in No. 164, it generally assignedly can give the surrenderee of subject application, itself and be incorporated to completely by reference at this.Alternately or in addition, the prismatic light output surface of this structuring comprises anti-seismic structure, as in U.S. patent application case the 7th, disclosed in 712, No. 944, it generally can the assigned surrenderee giving subject application, and is incorporated to completely by reference at this.Alternately or in addition, this structuring prismatic light output surface comprise transversely arrangedly to crawl, waveform or sinuous longitudinal prism structure row, as the U.S. patent application case the 12/854th of filing an application on August 11st, 2010, disclosed in No. 815, it generally can be assigned to the surrenderee of subject application, and be incorporated to completely by reference at this.

Invention also discloses the method forming concaveconvex structure on substrate.Concaveconvex structure can comprise multiple fragment (segment).As before described by Figure 14 c to Figure 14 f, fragment does not extend to opposite edges of substrate from an edge of substrate.For example, fragment can extend to from an edge of substrate in substrate surface area a bit or the second point extended to from 1 in substrate surface area first in substrate surface area.

Substrate can be the optical substrate with optical input surface and light output surface.In one embodiment, concaveconvex structure can be formed on the optical input surface of substrate; Concaveconvex structure can comprise lens arrangement and prism structure wherein at least one structure, and better, concaveconvex structure is lens arrangement.In another embodiment, concaveconvex structure can be formed in the light output of substrate on the surface; Concaveconvex structure can comprise lens arrangement and prism structure wherein at least one structure, and preferably, concaveconvex structure is prism structure.

Method comprises two main steps.In step: sequentially depict multiple groove by a control system on the surface at one of a mould, wherein the plurality of groove comprises at least one first groove, wherein for any one second groove in this at least one first groove, this second groove and be different from this second groove at least one 3rd groove overlap, with make this second groove block by this at least one 3rd groove (cutoff).Preferably, control (CNC) system by computer numerical uses hard instrument sequentially to delineate multiple groove on the surface of roller, wherein each this groove is delineated on first direction, wherein when each this groove is when delineating, this hard instrument is not extracted out and (when hard instrument does not thrust die/roller, die/roller has unstructured surface away from this roller; But when hard instrument thrusts die/roller delineation during groove, the front end of hard instrument maintains under unstructured surface always, until the front end that groove forms rear hard instrument is just extracted out and on unstructured surface, the column structure of one dimension is changed over the link structure of two dimension and there is not any interval between link by this measure, and then strengthens the diffusion effect of blooming).Preferably, hard instrument (front end) has lens (lenticular) shape (as shown in Figure 8, hard front tool has arc-shaped), compared to the hard instrument having prism (prismatic) shape, film with the mould made by the hard instrument delineation with lens shape after impressing has more diffusion effect, but hard instrument of the present invention does not limit to and has arc-shaped, as long as there is the shape for lugs of smooth curved and the film after can reaching impression has preferably diffusion effect.In one embodiment, the part that is not truncated of this at least the first groove is to should multiple fragments of concaveconvex structure.In stepb: use this surface imprint of this mould film on the substrate to form this concaveconvex structure on the substrate.

Multiple groove is delineated on the face of the die by control system.Preferably, each groove is delineated (such as extending to opposite edges of mould or the tangential direction of roller from an edge of mould) on first direction.Be incorporated into the open patterned surface how producing optical substrate according to many process technique of No. the 7th, 618,167, this United States Patent (USP) case by reference completely, comprise micromechanics and use hard instrument to form mould or homologue.Hard instrument can be the microsize instrument (such as: lathe, milling machine and straight cuts (ruling)/planer shaping (shaping) machine) be arranged in computer numerical control system.Preferably, control system is computer numerical control system and mould is roller.

It is noted that Figure 26 to Figure 30 illustrates a part of groove on the mold surface, but groove can distribute throughout in die surface (see Figure 32 a and Figure 32 d).In addition, by the fragment of the concaveconvex structure be formed on substrate can complementary (complementary) in (or corresponding to) part that groove is not truncated, conveniently only use one group of complementation map (see Figure 32 a to Figure 32 d) explanation at this.

Figure 26 to Figure 30 illustrates the top view forming a part of groove on the mold surface in different embodiments of the invention, wherein shows the opposite edges of each groove for convenience's sake.Multiple groove comprises at least one first groove (the first groove be namely truncated), wherein for any one second groove in this at least one first groove, this second groove and be different from this second groove at least one 3rd groove overlap, with make this second groove block by this at least one 3rd groove.In one embodiment, see Figure 26, the second groove represents with 2001 and the 3rd groove represents with 2002.In one embodiment, see Figure 27, the second groove represents with 2003 and multiple 3rd groove represents with 2004,2005.In one embodiment, see Figure 28, the second groove represents with 2006 and multiple 3rd groove represents with 2007,2008; Second groove represents with 2007 and the 3rd groove represents with 2008.In one embodiment, see Figure 29, the second groove represents with 2009 and the 3rd groove represents with 2010; Second groove represents with 2010 and the 3rd groove represents with 2011.In one embodiment, see Figure 30, the second groove represents with 2013 and the 3rd groove represents with 2014.Have interval (space) between groove in Figure 26 to Figure 30 at least, but between groove, also can there is no interval (i.e. not having interval between the fragment of concaveconvex structure).Second groove can be different from this second groove two (or more) the 3rd groove overlap, with make this second groove block by these two the 3rd grooves (see Figure 27 to Figure 28).In one embodiment, each groove for the second groove of blocking by least one 3rd groove, make concaveconvex structure not comprise the continuous lens or the prism that extend to opposite edges of substrate from an edge of substrate.

Groove A is made to have one first edge and one second edge and groove B has this first edge of respective grooves A and one the 3rd edge at this second edge and one the 4th edge respectively when groove A and groove B (also can be at least one groove B) is formed, blocking (cutoff) (i.e. groove A block by groove B) may be defined to: when groove A and groove B too exaggerates mutually overlapping (overlap), the part at the 3rd edge of groove B falls within outside first edge of groove A.Have a lot of modes to form overlapping, such as control groove degree of depth variation (later with reference to figure 15a to Figure 15 f), the degree of depth of the swing (swing) (later with reference to figure 13a, Figure 13 b, Figure 14 a and Figure 14 b) and control groove that control groove make a variation and swing (with reference to figure 13a, Figure 13 b, Figure 14 a, Figure 14 b and Figure 15 a to Figure 15 f).

In one embodiment, multiple groove comprises at least one first groove (at least one first groove be namely truncated), wherein for any one second groove in this at least one first groove, this second groove overlaps with at least one 3rd groove being different from this second groove, with make this second groove block by this at least one 3rd groove, wherein this at least one 3rd groove comprises one the 4th groove and one the 5th groove, wherein this second groove this second groove a primary importance block by the 4th groove and this second groove the second place of this second groove block by the 5th groove, wherein this second place is different from this primary importance.In one embodiment, with reference to Figure 28, second groove represents with 2006, multiple 3rd groove represents with 2007,2008,4th groove represents with 2007,5th groove represents with 2008, the second groove 2006 the second groove 2006 primary importance 2006A block by the 4th groove 2007 and the second groove 2006 the second place 2006B of the second groove 2006 block by the 5th groove 2008 (second place 2006B is different from primary importance 2006A).

In one embodiment, multiple groove comprises at least one first groove (at least one first groove be namely truncated), wherein for any one second groove in this at least one first groove, this second groove and at least one 3rd groove (being different from this second groove) and one the 4th groove (being different from this second groove and this at least one 3rd groove) overlap, with make this second groove block by this at least one 3rd groove, but not block by the 4th groove.In one embodiment, with reference to Figure 29, the second groove represents with 2009,3rd groove represents with 2010,4th groove represents with 2011, the second groove 2009 block by the 3rd groove 2010, but not block by the 4th groove 2011 (see position 2009A).

In embodiment shown in Figure 26 to Figure 29, the opposite edges of each groove swing (swing) along one first longitudinal axis 2051, however this first longitudinal axis 2051 do not fall within each groove opposite edges between (see Figure 31 a).Embodiment shown in Figure 26 to Figure 29 is reached (later with reference to figure 13a, Figure 13 b, Figure 14 a and Figure 14 b) by the swing controlling groove, preferably, less control by degree the swing that the degree of depth variation of groove and degree more control groove to reach (with reference to figure 13a, Figure 13 b, Figure 14 a, Figure 14 b and Figure 15 a to Figure 15 f).In the embodiment shown in Figure 30, first longitudinal axis 2051 fall within each groove opposite edges between (see Figure 31 b).Embodiment shown in Figure 30 is reached by the degree of depth variation controlling groove and (f) (is namely maintained hard instrument along the first straight line (first longitudinal axis 2051 see Figure 31 b) in a first direction to delineate the first groove 2013 along first direction with reference to figure 15a to Figure 15; And maintain hard instrument along the second straight line (first longitudinal axis 2051 see Figure 31 b) to delineate the second groove 2014 along this first direction, wherein this second straight line parallel this first straight line in a first direction, wherein by being enough to block the first groove 2013 along the horizontal direction of the second groove 2014 by the transverse width increase of thrusting the second groove 2014 that the degree of depth controls of hard instrument, making the first groove 2013 be separated (separate) by the second groove 2014 and becoming multiple groove (notch); if in the first groove 2013 and the second groove 2014 each groove maintain hard instrument along a straight line in a first direction with along keep during first direction delineation groove thrusting the degree of depth constant time, then the second groove 2014 can not block the first groove 2013 along its horizontal direction, this example is increased by the transverse width thrusting the second groove 2014 that the degree of depth controls of hard instrument, be enough to block the first groove 2013 along the horizontal direction of the second groove 2014 when the transverse width of the second groove 2014 is increased to a degree), by maintenance hard instrument in fact along the first straight line in a first direction to delineate each groove along first direction, this mode is compared and is carried out delineating groove along first direction is sinuous, not only Production Time can be shortened, also mould precision can be increased to reduce the error on making (because hard front tool has arc-shaped, so can ensure that the groove delineated on mould also has level and smooth arc-shaped, the film impressed has better diffusion effect).The present invention also more controls by degree the swing that the degree of depth variation of groove and degree less control groove and reaches (with reference to figure 13a, Figure 13 b, Figure 14 a, Figure 14 b and Figure 15 a to Figure 15 f).The opposite edges of each groove can be symmetrical in first longitudinal axis 2051.The opposite edges of each groove can be asymmetric with first longitudinal axis 2051, and preferably, the mean distance between an edge and first longitudinal axis 2051 is equal in fact the mean distance between another edge and first longitudinal axis 2051.

Please refer to Figure 32 a to Figure 32 d.Figure 32 a is the three dimensions schematic diagram of mould, and wherein this mould has the multiple grooves on its surface.Figure 32 b is the top view of Figure 32 a.Figure 32 c is the three dimensions schematic diagram of substrate, and wherein this substrate has by an impression film thereon with the concaveconvex structure be formed thereon.Figure 32 d is the top view of Figure 32 c.In the embodiment shown in Figure 32 a to Figure 32 b, multiple groove by control groove the degree of depth variation formed and on the surface of mould 2055, but the present invention is not limited thereto case (for example, control the swing of groove, control the degree of depth variation of groove and swing).Specifically, when groove X be later than groove Y delineate time, groove Y block by groove X and is formed in fact on a First Line 2063 configure multiple parts 2061.There is an interval 2062 between adjacent part 2061.In one embodiment, the width of groove X is greater than the width of groove Y.Optionally, the width of a part of groove X is less than the width of groove Y.In another embodiment, the degree of depth variation of groove X is greater than the degree of depth variation of groove Y.After imprinting, the part 2061 on mould 2055 surface is complementary to, and (or corresponding to) is formed in the fragment 2066 of the concaveconvex structure on substrate 2056.

Can consider in the scope of the invention and spirit, the further combination of two or more above description architecture surface characteristics, it can be implemented as and be present in single optical substrate, to obtain the hope optical results of the application-specific with LC module.

According to the present invention, this optical substrate (such as, in Fig. 6 a 50) prismatic, structured light output surface and structuring biconvex optical input surface is comprised, when being such as employed in an lcd, it is can highlight together, reduce interference grating and provide acceptable diffusion characteristic.Merge optical substrate of the present invention designed according to this invention and LCD of the present invention, it can be configured in an electronic installation.As shown in figure 25, electronics 110 (its be PDA, mobile phone, TV, display screen, pocket computer, refrigerator etc. one of them) comprises the LCD100 designed by one embodiment of the invention.LCD100 comprises the optical substrate in above the present invention.Electronic installation 110 is included in user's inputting interface in suitable shell (such as button and button further, summarily shown by square 116), being used for the image data of the imaging data stream managing LCD100 controls electronics (such as controller, summarily shown by square 112), (it comprises processor to the special electronics for electronic installation 110, A/D converter, memory device, data memory device etc., it is collectively represented by square 118 summaries), and power supply (such as charger, the socket of battery or external power source, it is summarily represented by square 114), those original papers are well known in this technical field.

Claims

1. form a method for a concaveconvex structure on a substrate, it is characterized in that, comprise following steps:

Maintain this hard instrument along one first straight line on a first direction to delineate one first groove along this first direction; And maintain this hard instrument along one second straight line to delineate one second groove along this first direction, wherein this second straight line parallel this first straight line on this first direction, wherein be enough to block this first groove along the horizontal direction of this second groove by the transverse width increase of thrusting this second groove that the degree of depth controls of this hard instrument, make this first groove be separated into multiple groove by this second groove; And use this surface imprint film on the substrate of this mould, to form this concaveconvex structure on the substrate.

2. method according to claim 1, is characterized in that, this substrate is an optical substrate, and wherein this optical substrate has an optical input surface and a light gasing surface, and this concaveconvex structure is formed on this optical input surface of this substrate.

3. method according to claim 2, is characterized in that, this concaveconvex structure is a lens arrangement.

4. method according to claim 2, is characterized in that, this concaveconvex structure is a prism structure.

5. form a method for a concaveconvex structure on a substrate, it is characterized in that, comprise following steps:

6. method according to claim 5, is characterized in that, the part that the plurality of first groove is not truncated is to should multiple fragments of concaveconvex structure.

7. method according to claim 6, is characterized in that, this concaveconvex structure is included in space between the plurality of fragment or flat board, and this space or dull and stereotyped corresponding this at this mould do not delineate the region of the plurality of groove on the surface.

8. method according to claim 6, is characterized in that, at least one fragment is biconvex fragment.

9. a method for Mold Making, is characterized in that, comprises following steps:

10. form a method for a blooming, it is characterized in that, comprise following steps:

The light output face of this substrate forms a prism structure.