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WO2010019381A3 - Enhanced uniformity backlight - Google Patents

Enhanced uniformity backlight Download PDF

Info

Publication number
WO2010019381A3
WO2010019381A3 PCT/US2009/052037 US2009052037W WO2010019381A3 WO 2010019381 A3 WO2010019381 A3 WO 2010019381A3 US 2009052037 W US2009052037 W US 2009052037W WO 2010019381 A3 WO2010019381 A3 WO 2010019381A3
Authority
WO
WIPO (PCT)
Prior art keywords
light source
images
linear light
backlights
microstructure
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.)
Ceased
Application number
PCT/US2009/052037
Other languages
French (fr)
Other versions
WO2010019381A2 (en
Inventor
Quinn D. Sanford
Kevin M. Hoffman
Kenneth A. Epstein
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
3M Innovative Properties Co
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 filed Critical 3M Innovative Properties Co
Publication of WO2010019381A2 publication Critical patent/WO2010019381A2/en
Publication of WO2010019381A3 publication Critical patent/WO2010019381A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

Enhanced uniformity backlights and methods of assembling a backlight are disclosed. The backlights maintain light uniformity by generating a plurality of images of a linear light source instead of by increasing the number of light sources. A microstructured film receives light from the linear light source and refracts the light to an image receptor. The microstructured film includes an array of microstructures that have a symmetry that provides multiple images of the light source. The positioning and brightness of the images on the image receptor is dependent on the microstructure and the orientation of the microstructure to the linear light source. A method is disclosed to identify the relative orientation of symmetric microstructures which can provide more uniform images of the linear light source.
PCT/US2009/052037 2008-08-15 2009-07-29 Enhanced uniformity backlight Ceased WO2010019381A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8910408P 2008-08-15 2008-08-15
US61/089,104 2008-08-15

Publications (2)

Publication Number Publication Date
WO2010019381A2 WO2010019381A2 (en) 2010-02-18
WO2010019381A3 true WO2010019381A3 (en) 2010-05-06

Family

ID=41669561

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/052037 Ceased WO2010019381A2 (en) 2008-08-15 2009-07-29 Enhanced uniformity backlight

Country Status (2)

Country Link
TW (1) TW201013261A (en)
WO (1) WO2010019381A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI406058B (en) * 2010-12-20 2013-08-21 Au Optronics Corp Backlight module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006251436A (en) * 2005-03-11 2006-09-21 Dainippon Printing Co Ltd Uniform sheet and surface light source device
WO2007002341A1 (en) * 2005-06-24 2007-01-04 3M Innovative Properties Company Optical element for lateral light spreading in back-lit displays and system using same
JP2007095386A (en) * 2005-09-27 2007-04-12 Nippon Zeon Co Ltd Direct backlight unit
US20070182883A1 (en) * 2006-01-20 2007-08-09 Au Optronics Corporation Light Diffusion Module and a Back Light Module Using the Same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006251436A (en) * 2005-03-11 2006-09-21 Dainippon Printing Co Ltd Uniform sheet and surface light source device
WO2007002341A1 (en) * 2005-06-24 2007-01-04 3M Innovative Properties Company Optical element for lateral light spreading in back-lit displays and system using same
JP2007095386A (en) * 2005-09-27 2007-04-12 Nippon Zeon Co Ltd Direct backlight unit
US20070182883A1 (en) * 2006-01-20 2007-08-09 Au Optronics Corporation Light Diffusion Module and a Back Light Module Using the Same

Also Published As

Publication number Publication date
TW201013261A (en) 2010-04-01
WO2010019381A2 (en) 2010-02-18

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