WO2000048037A3 - Optical film with defect-reducing surface and method for making same - Google Patents

Optical film with defect-reducing surface and method for making same Download PDF

Info

Publication number
WO2000048037A3
WO2000048037A3 PCT/US1999/011580 US9911580W WO0048037A3 WO 2000048037 A3 WO2000048037 A3 WO 2000048037A3 US 9911580 W US9911580 W US 9911580W WO 0048037 A3 WO0048037 A3 WO 0048037A3
Authority
WO
WIPO (PCT)
Prior art keywords
film
optical film
local height
characteristic measure
defect
Prior art date
Application number
PCT/US1999/011580
Other languages
French (fr)
Other versions
WO2000048037A2 (en
Inventor
Alan B Campbell
Andrew J Mckee
Sanford Cobb Jr
Wade D Kretman
Original Assignee
3M Innovative Properties Co
Alan B Campbell
Andrew J Mckee
Cobb Sanford J
Wade D Kretman
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Co, Alan B Campbell, Andrew J Mckee, Cobb Sanford J, Wade D Kretman filed Critical 3M Innovative Properties Co
Priority to CA002359118A priority Critical patent/CA2359118A1/en
Priority to JP2000598892A priority patent/JP4480279B2/en
Priority to AU40992/99A priority patent/AU4099299A/en
Priority to BR9917056-6A priority patent/BR9917056A/en
Priority to EP99924510A priority patent/EP1159645A1/en
Priority to KR1020047007893A priority patent/KR100640126B1/en
Publication of WO2000048037A2 publication Critical patent/WO2000048037A2/en
Publication of WO2000048037A3 publication Critical patent/WO2000048037A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S385/00—Optical waveguides
    • Y10S385/901—Illuminating or display apparatus

Abstract

An optical film has surface that reduces the occurrence of optical defects in a display (300) using the film. In particular, the surface (310) has randomized characteristics that reduce such defects as wet-out, Newton's rings, and Moiré effects.the film has a first surface (310) free of regular structure, the first surface (310) having a plurality of local height maxima (312), a characteristic measure of the first surface (310) having a random value within a predetermined range. The film also has a second surface opposing the first surface. A method of making an optical film includes embossing a pattern lacking regular structure onto a first surface of a film, wherein the first surface (310) has a plurality of local height maxima (312), a characteristic measure of the first surface (310) having a random value within a predetermined range. The characteristic measure may be a difference between the actual heights and a nominal height of the film surface, average separation between the local height maxima (312) on the surface, or slope angle of the first surface proximate a local height maximum (312).
PCT/US1999/011580 1999-02-09 1999-05-26 Optical film with defect-reducing surface and method for making same WO2000048037A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002359118A CA2359118A1 (en) 1999-02-09 1999-05-26 Optical film with defect-reducing surface and method for making same
JP2000598892A JP4480279B2 (en) 1999-02-09 1999-05-26 Optical film having a surface for reducing defects
AU40992/99A AU4099299A (en) 1999-02-09 1999-05-26 Optical film with defect-reducing surface and method for making same
BR9917056-6A BR9917056A (en) 1999-02-09 1999-05-26 Optical film, optical device, processes for producing an optical film and a master replication drum, and, drum for embossing a surface on a film
EP99924510A EP1159645A1 (en) 1999-02-09 1999-05-26 Optical film with defect-reducing surface and method for making same
KR1020047007893A KR100640126B1 (en) 1999-02-09 1999-05-26 Method for Making Optical Film with Defect-Reducing Surface

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/246,970 US6322236B1 (en) 1999-02-09 1999-02-09 Optical film with defect-reducing surface and method for making same
US09/246,970 1999-02-09

Publications (2)

Publication Number Publication Date
WO2000048037A2 WO2000048037A2 (en) 2000-08-17
WO2000048037A3 true WO2000048037A3 (en) 2001-08-23

Family

ID=22932967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/011580 WO2000048037A2 (en) 1999-02-09 1999-05-26 Optical film with defect-reducing surface and method for making same

Country Status (9)

Country Link
US (2) US6322236B1 (en)
EP (1) EP1159645A1 (en)
JP (1) JP4480279B2 (en)
KR (2) KR100623536B1 (en)
CN (1) CN1161250C (en)
AU (1) AU4099299A (en)
BR (1) BR9917056A (en)
CA (1) CA2359118A1 (en)
WO (1) WO2000048037A2 (en)

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