WO2009078439A1 - Optical sheet and backlight unit using the same - Google Patents

Optical sheet and backlight unit using the same Download PDF

Info

Publication number
WO2009078439A1
WO2009078439A1 PCT/JP2008/072992 JP2008072992W WO2009078439A1 WO 2009078439 A1 WO2009078439 A1 WO 2009078439A1 JP 2008072992 W JP2008072992 W JP 2008072992W WO 2009078439 A1 WO2009078439 A1 WO 2009078439A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical sheet
backlight unit
ridges
ccfl
same
Prior art date
Application number
PCT/JP2008/072992
Other languages
French (fr)
Japanese (ja)
Inventor
Yuji Kurokawa
Original Assignee
Takiron Co., Ltd.
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 Takiron Co., Ltd. filed Critical Takiron Co., Ltd.
Priority to JP2009546284A priority Critical patent/JPWO2009078439A1/en
Publication of WO2009078439A1 publication Critical patent/WO2009078439A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)

Abstract

This object aims to provide an optical sheet (1) with a set (S) so formed as to be repeatedly arranged on the upper surface of the sheet, the set (S) consisting of a plurality of ridges (1a - 1c) each having a shape of isosceles triangle with different base angles, whereby uneven brightness in accordance with distances from CCFL (2) can be eliminated and the optical sheet does not depend on an arranged position of the CCFL (2); and a backlight unit using the optical sheet. An optical sheet (1) used for a direct type backlight unit is provided with a number of convex ridges so formed as to be arranged on the upper surface of the optical sheet (1), wherein the ridges in a region of the optical sheet (1) corresponding to each CCFL (2) are comprised of further repeatedly arranged sets (S) of three kinds of ridges (1a-1c) with mutually different shapes.
PCT/JP2008/072992 2007-12-18 2008-12-17 Optical sheet and backlight unit using the same WO2009078439A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009546284A JPWO2009078439A1 (en) 2007-12-18 2008-12-17 Optical sheet and backlight unit using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007325939 2007-12-18
JP2007-325939 2007-12-18

Publications (1)

Publication Number Publication Date
WO2009078439A1 true WO2009078439A1 (en) 2009-06-25

Family

ID=40795552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/072992 WO2009078439A1 (en) 2007-12-18 2008-12-17 Optical sheet and backlight unit using the same

Country Status (3)

Country Link
JP (1) JPWO2009078439A1 (en)
KR (1) KR20100095536A (en)
WO (1) WO2009078439A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011128453A (en) * 2009-12-18 2011-06-30 Takiron Co Ltd Optical sheet and backlight unit using the same
WO2012043326A1 (en) * 2010-09-28 2012-04-05 住友化学株式会社 Optical member subjected to non-glare treatment
JP2017228432A (en) * 2016-06-22 2017-12-28 スタンレー電気株式会社 Vehicular lighting fixture
WO2023105372A1 (en) * 2021-12-07 2023-06-15 3M Innovative Properties Company Microstructured surface and articles with lower visibilty of scratches and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014092507A1 (en) * 2012-12-14 2014-06-19 제일모직 주식회사 Multi-light guide sheet and liquid crystal display device including same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10214035A (en) * 1997-01-30 1998-08-11 Canon Inc Back light device and liquid crystal display device using the same
JP2007094400A (en) * 2005-09-27 2007-04-12 Samsung Electronics Co Ltd Light-guide plate, backlight assembly having the light-guide plate and display device
WO2007049618A1 (en) * 2005-10-28 2007-05-03 Zeon Corporation Light diffusion plate and direct backlight device
WO2007066729A1 (en) * 2005-12-09 2007-06-14 Sony Corporation Surface light emission device and liquid crystal display
JP2008146025A (en) * 2006-11-15 2008-06-26 Sumitomo Chemical Co Ltd Light diffuser plate, surface light source device, and liquid crystal display apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10214035A (en) * 1997-01-30 1998-08-11 Canon Inc Back light device and liquid crystal display device using the same
JP2007094400A (en) * 2005-09-27 2007-04-12 Samsung Electronics Co Ltd Light-guide plate, backlight assembly having the light-guide plate and display device
WO2007049618A1 (en) * 2005-10-28 2007-05-03 Zeon Corporation Light diffusion plate and direct backlight device
WO2007066729A1 (en) * 2005-12-09 2007-06-14 Sony Corporation Surface light emission device and liquid crystal display
JP2008146025A (en) * 2006-11-15 2008-06-26 Sumitomo Chemical Co Ltd Light diffuser plate, surface light source device, and liquid crystal display apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011128453A (en) * 2009-12-18 2011-06-30 Takiron Co Ltd Optical sheet and backlight unit using the same
WO2012043326A1 (en) * 2010-09-28 2012-04-05 住友化学株式会社 Optical member subjected to non-glare treatment
JP2017228432A (en) * 2016-06-22 2017-12-28 スタンレー電気株式会社 Vehicular lighting fixture
WO2023105372A1 (en) * 2021-12-07 2023-06-15 3M Innovative Properties Company Microstructured surface and articles with lower visibilty of scratches and methods

Also Published As

Publication number Publication date
JPWO2009078439A1 (en) 2011-04-28
KR20100095536A (en) 2010-08-31

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