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TW200717136A - Light diffusion plate and direct backlight device - Google Patents

Light diffusion plate and direct backlight device

Info

Publication number
TW200717136A
TW200717136A TW095139506A TW95139506A TW200717136A TW 200717136 A TW200717136 A TW 200717136A TW 095139506 A TW095139506 A TW 095139506A TW 95139506 A TW95139506 A TW 95139506A TW 200717136 A TW200717136 A TW 200717136A
Authority
TW
Taiwan
Prior art keywords
light
diffusion plate
light diffusion
backlight device
direct backlight
Prior art date
Application number
TW095139506A
Other languages
Chinese (zh)
Inventor
Kenji Kusano
Original Assignee
Zeon Corp
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 Zeon Corp filed Critical Zeon Corp
Publication of TW200717136A publication Critical patent/TW200717136A/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
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • 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
    • G02B5/0226—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 having particles on the surface
    • 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
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • 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

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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Disclosed are a light diffusion plate improved in luminance and luminance uniformity, and a direct backlight device. Specifically disclosed is a light diffusion plate for diffusing the light from a light source, which comprises a light incident surface through which the light from the light source enters and a light emitting surface through which the incident light is diffused and emitted. This light diffusion plate is characterized in that the light incident surface is a generally flat surface while the light emitting surface has a prism array having a plurality of linear prisms of a specific shape having a projected or recessed cross section. Also specifically disclosed is a direct backlight device characterized by comprising such a light diffusion plate.
TW095139506A 2005-10-28 2006-10-26 Light diffusion plate and direct backlight device TW200717136A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005315153 2005-10-28
JP2006027529 2006-02-03

Publications (1)

Publication Number Publication Date
TW200717136A true TW200717136A (en) 2007-05-01

Family

ID=37967728

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095139506A TW200717136A (en) 2005-10-28 2006-10-26 Light diffusion plate and direct backlight device

Country Status (3)

Country Link
JP (1) JPWO2007049618A1 (en)
TW (1) TW200717136A (en)
WO (1) WO2007049618A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104536069A (en) * 2015-01-06 2015-04-22 京东方科技集团股份有限公司 Splitting film, backlight module and display device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5078491B2 (en) * 2007-07-31 2012-11-21 株式会社巴川製紙所 Directional film and directional diffusion film
JP2009117194A (en) * 2007-11-07 2009-05-28 Puratekku:Kk Light cover and light apparatus
KR20100095536A (en) * 2007-12-18 2010-08-31 다키론가부시키가이샤 Optical sheet and backlight unit using the same
JP2009158135A (en) * 2007-12-25 2009-07-16 Sumitomo Chemical Co Ltd Surface light source device and liquid crystal display device
JP5544727B2 (en) * 2009-03-05 2014-07-09 凸版印刷株式会社 Backlight unit and display device
JP5840885B2 (en) * 2011-07-25 2016-01-06 株式会社小糸製作所 Vehicle lighting
US8797480B2 (en) 2011-10-18 2014-08-05 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device, and display device
JP5765647B2 (en) * 2014-03-11 2015-08-19 大日本印刷株式会社 Light guide plate, surface light source device and display device
JP6707848B2 (en) * 2015-12-03 2020-06-10 市光工業株式会社 Inner lens and vehicle lighting
JP2018105929A (en) * 2016-12-22 2018-07-05 京セラ株式会社 Light collector and solar cell module using the same
JP7245772B2 (en) * 2017-04-27 2023-03-24 ソニーグループ株式会社 Optical member, display device and lighting device
WO2021246001A1 (en) 2020-06-04 2021-12-09 パナソニックＩｐマネジメント株式会社 Display device, head-up display, and mobile object
US11871907B2 (en) * 2021-05-28 2024-01-16 Evident Corporation Illumination optical system for endoscope, optical adaptor and endoscope

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3106050B2 (en) * 1994-02-17 2000-11-06 三菱レイヨン株式会社 Brightness improvement sheet for surface light source
JP3582544B2 (en) * 1995-06-20 2004-10-27 大日本印刷株式会社 Lens sheet, surface light source and display device
JP3548812B2 (en) * 1995-08-11 2004-07-28 オムロン株式会社 Surface light source device, planar optical element used in the device, and image display device using the device
JPH10214035A (en) * 1997-01-30 1998-08-11 Canon Inc Back light device and liquid crystal display device using the same
JP2000231103A (en) * 1999-02-09 2000-08-22 Mitsubishi Rayon Co Ltd Lens sheet and back light and liquid crystal display device using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104536069A (en) * 2015-01-06 2015-04-22 京东方科技集团股份有限公司 Splitting film, backlight module and display device
CN104536069B (en) * 2015-01-06 2018-01-12 京东方科技集团股份有限公司 Spectro-film, backlight module and display device

Also Published As

Publication number Publication date
JPWO2007049618A1 (en) 2009-04-30
WO2007049618A1 (en) 2007-05-03

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