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CA2413700A1 - Backlight with structured sufaces - Google Patents

Backlight with structured sufaces Download PDF

Info

Publication number
CA2413700A1
CA2413700A1 CA002413700A CA2413700A CA2413700A1 CA 2413700 A1 CA2413700 A1 CA 2413700A1 CA 002413700 A CA002413700 A CA 002413700A CA 2413700 A CA2413700 A CA 2413700A CA 2413700 A1 CA2413700 A1 CA 2413700A1
Authority
CA
Canada
Prior art keywords
lightguide
backlight
sufaces
structured
optical structures
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002413700A
Other languages
French (fr)
Other versions
CA2413700C (en
Inventor
Mark E. Gardiner
Sandford Cobb
Wade D. Kretman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
Individual
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
Priority claimed from US09/613,313 external-priority patent/US7046905B1/en
Application filed by Individual filed Critical Individual
Publication of CA2413700A1 publication Critical patent/CA2413700A1/en
Application granted granted Critical
Publication of CA2413700C publication Critical patent/CA2413700C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

A backlight includes a lightguide (16), a light source (12) disposed with respect to the lightguide (16) to introduce light into the lightguide (16) and a turning film. Optical structures (40) are formed in one of an output surface (18) and a back surface (20) of the lightguide (16). The optical structures (40) are arranged to extract light from the lightguide (16). A back reflector (24) is disposed adjacent the back surface (20). The optical structures (40) are formed to include a varying pattern arranged to mask non-uniformities in the output of the lightguide (16).
CA002413700A 2000-07-11 2001-07-05 Backlight with structured sufaces Expired - Fee Related CA2413700C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/613,313 US7046905B1 (en) 1999-10-08 2000-07-11 Blacklight with structured surfaces
US09/613,313 2000-07-11
PCT/US2001/021294 WO2002004858A2 (en) 2000-07-11 2001-07-05 Backlight with structured sufaces

Publications (2)

Publication Number Publication Date
CA2413700A1 true CA2413700A1 (en) 2002-01-17
CA2413700C CA2413700C (en) 2007-01-09

Family

ID=24456785

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002413700A Expired - Fee Related CA2413700C (en) 2000-07-11 2001-07-05 Backlight with structured sufaces

Country Status (8)

Country Link
EP (1) EP1301743A2 (en)
JP (1) JP2004507866A (en)
KR (1) KR100830261B1 (en)
CN (1) CN100350308C (en)
AU (2) AU2001275868B8 (en)
CA (1) CA2413700C (en)
HK (1) HK1056210A1 (en)
WO (1) WO2002004858A2 (en)

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EP1309437B1 (en) 2000-08-18 2006-03-01 Reflexite Corporation Differentially cured materials and process for forming same
US6908202B2 (en) 2002-10-03 2005-06-21 General Electric Company Bulk diffuser for flat panel display
KR100926299B1 (en) 2002-11-13 2009-11-12 삼성전자주식회사 Reflector for backlight assembly and backlight assembly using the same
CN1833183A (en) 2003-05-02 2006-09-13 瑞弗莱克塞特公司 Light-redirecting optical structures
US7106517B2 (en) 2003-12-31 2006-09-12 General Electric Company Display optical films
US7316498B2 (en) * 2003-12-31 2008-01-08 General Electric Company Faceted optical substrate and method of fabricating a faceted optical substrate and a backlight display comprising the faceted optical substrate
KR100553155B1 (en) * 2004-06-04 2006-02-22 주식회사 엘지에스 Optical film
KR100487105B1 (en) * 2004-06-04 2005-05-04 주식회사 엘지에스 Optical film
KR100512193B1 (en) * 2004-10-29 2005-09-05 주식회사 엘지에스 Optical film and back-light unit has them
US20060210770A1 (en) * 2005-03-09 2006-09-21 Nelson John C Microreplicated article with defect-reducing surface
WO2006098935A1 (en) 2005-03-09 2006-09-21 3M Innovative Properties Company Apparatus and method for producing two-sided patterned web in registration
CN101137449B (en) 2005-03-09 2012-08-29 3M创新有限公司 Microreplicated article and production method thereof
ATE496706T1 (en) 2005-03-09 2011-02-15 3M Innovative Properties Co APPARATUS AND METHOD FOR PRODUCING A MICRREPLICATED OBJECT
WO2006110401A2 (en) * 2005-04-08 2006-10-19 3M Innovative Properties Company Structured oriented films for use in displays
US7418202B2 (en) 2005-08-04 2008-08-26 3M Innovative Properties Company Article having a birefringent surface and microstructured features having a variable pitch or angles for use as a blur filter
US7815355B2 (en) 2005-08-27 2010-10-19 3M Innovative Properties Company Direct-lit backlight having light recycling cavity with concave transflector
US7695180B2 (en) * 2005-08-27 2010-04-13 3M Innovative Properties Company Illumination assembly and system
CN100406999C (en) * 2005-09-09 2008-07-30 财团法人工业技术研究院 Light guide plate and backlight module with same
CN101331422B (en) * 2005-12-15 2012-11-14 Tp视觉控股有限公司 Display system with variable diffuser
KR100770929B1 (en) * 2006-05-26 2007-10-26 삼성전자주식회사 Light guide plate and backlight unit using the same
JP4874009B2 (en) * 2006-06-19 2012-02-08 シチズン電子株式会社 Light diffuser
US9134471B2 (en) 2006-06-28 2015-09-15 3M Innovative Properties Company Oriented polymeric articles and method
KR100784021B1 (en) 2006-07-04 2007-12-10 삼성에스디아이 주식회사 Backlight Unit of Liquid Crystal Display
CN100533187C (en) * 2006-11-10 2009-08-26 嘉威光电股份有限公司 Optical diaphragm and backlight module applying same
JP4725529B2 (en) * 2007-02-13 2011-07-13 ソニー株式会社 Backlight drive device, display device
CN101779148B (en) 2007-06-14 2014-06-25 艾利丹尼森公司 Illuminated graphical and information display
WO2009100560A1 (en) * 2008-01-31 2009-08-20 Dingguo Pan A disc-shaped light reflecting plate with variable section unequilateral right triangles prisms and a lamp made therefrom
CN101981474A (en) 2008-04-02 2011-02-23 3M创新有限公司 Light directing film and method for making the same
KR100963676B1 (en) * 2008-07-23 2010-06-15 제일모직주식회사 Prism sheet with improved front luminance and viewing angle, backlight unit employing the same, and liquid crystal display device having the backlight unit
US7931396B2 (en) * 2008-12-10 2011-04-26 Sharp Kabushiki Kaisha Backlight and display
JP5552480B2 (en) * 2009-03-27 2014-07-16 株式会社きもと Newton ring prevention sheet and touch panel using the same
CN101852876B (en) * 2009-04-02 2012-06-13 财团法人工业技术研究院 Composite optical film and surface light source module
JP5866765B2 (en) * 2010-04-28 2016-02-17 ソニー株式会社 Conductive element and manufacturing method thereof, wiring element, information input device, display device, and electronic apparatus
JP5610202B2 (en) * 2010-06-23 2014-10-22 ミネベア株式会社 Surface lighting device
EP2463157B1 (en) * 2010-12-10 2015-04-15 SMR Patents S.à.r.l. Rear view mirror assembly with optical indicator
US8770810B2 (en) 2010-12-10 2014-07-08 Smr Patents S.A.R.L. Rear view mirror assembly with optical indicator
JP2017207736A (en) * 2016-05-16 2017-11-24 恵和株式会社 Optical sheet for liquid crystal display device, backlight unit for liquid crystal display device and production method of optical sheet for liquid crystal display device
JP7214334B2 (en) * 2016-06-14 2023-01-30 恵和株式会社 Prism sheet for backlight unit and backlight unit for liquid crystal display device
US9810904B1 (en) * 2016-11-11 2017-11-07 Google Inc. Fresnel lens assembly having varying facet angle
FR3089308A1 (en) 2018-11-30 2020-06-05 Commissariat A L'energie Atomique Et Aux Energies Alternatives Optical coupler
JP7493149B2 (en) 2020-10-28 2024-05-31 パナソニックＩｐマネジメント株式会社 Light-refractive components, optical systems, lighting systems, display systems, moving bodies and molds
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Also Published As

Publication number Publication date
WO2002004858A2 (en) 2002-01-17
AU2001275868B2 (en) 2006-02-02
AU7586801A (en) 2002-01-21
JP2004507866A (en) 2004-03-11
KR20030015378A (en) 2003-02-20
AU2001275868B8 (en) 2006-05-11
CA2413700C (en) 2007-01-09
CN100350308C (en) 2007-11-21
CN1464955A (en) 2003-12-31
EP1301743A2 (en) 2003-04-16
HK1056210A1 (en) 2004-02-06
WO2002004858A3 (en) 2002-05-23
KR100830261B1 (en) 2008-05-16

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