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TW200834185A - Direct backlight device - Google Patents

Direct backlight device

Info

Publication number
TW200834185A
TW200834185A TW096140017A TW96140017A TW200834185A TW 200834185 A TW200834185 A TW 200834185A TW 096140017 A TW096140017 A TW 096140017A TW 96140017 A TW96140017 A TW 96140017A TW 200834185 A TW200834185 A TW 200834185A
Authority
TW
Taiwan
Prior art keywords
light
light source
diffuser
backlight device
projection
Prior art date
Application number
TW096140017A
Other languages
Chinese (zh)
Inventor
Keisuke Tsukada
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 TW200834185A publication Critical patent/TW200834185A/en

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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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)
  • Optical Elements Other Than Lenses (AREA)

Abstract

A direct backlight device having an improved luminance uniformity of the light-emitting surface. The direct backlight device has a reflector, a light source, and a light diffuser. A rough structure of a predetermined Ra (max) is fabricated on the light exit surface. A light transmission suppressing layer is provided in a region (MR) on the light entrance surface. The minimum value of the transmittance of (MR) is 5% or more smaller than the transmittance of the parts of the light diffuser and light transmission suppressing layer between the position which is the projection of the center position of the light source onto the light diffuser and the position which is the projection of the middle position between the light source and the adjacent light source onto the light diffuser. An average distance (a) between the centers of the light source and its adjacent light source and an average distance (b) between the center of the light source and the light entrance surface satisfies a predetermined relation. The region (MR) is within a distance (M) from the reference line which is the projection of the center line of the light source onto the light entrance surface of the light diffuser, and (M) and (b) satisfy a predetermined relation.
TW096140017A 2006-10-27 2007-10-25 Direct backlight device TW200834185A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006293176 2006-10-27
PCT/JP2007/070646 WO2008050763A1 (en) 2006-10-27 2007-10-23 Direct backlight device

Publications (1)

Publication Number Publication Date
TW200834185A true TW200834185A (en) 2008-08-16

Family

ID=39324560

Family Applications (1)

Application Number Title Priority Date Filing Date
TW096140017A TW200834185A (en) 2006-10-27 2007-10-25 Direct backlight device

Country Status (3)

Country Link
JP (1) JPWO2008050763A1 (en)
TW (1) TW200834185A (en)
WO (1) WO2008050763A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9341754B2 (en) 2009-09-11 2016-05-17 Asahi Kasei E-Materials Corporation Light diffuser for point light source and direct type point light source backlight device
US12230518B2 (en) 2017-04-18 2025-02-18 SCREEN Holdings Co., Ltd. Light irradiation type heat treatment apparatus

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432723B1 (en) * 2008-08-21 2014-08-22 삼성디스플레이 주식회사 Backlight assembly and display device having the same
KR101540216B1 (en) 2008-11-03 2015-07-29 삼성디스플레이 주식회사 Optical element and display device including the same
KR101601634B1 (en) * 2008-12-04 2016-03-11 삼성디스플레이 주식회사 Backlight assembly
WO2011111445A1 (en) * 2010-03-10 2011-09-15 シャープ株式会社 Lighting device, display apparatus, and television receiver
JP2012094310A (en) * 2010-10-26 2012-05-17 Panasonic Corp Lighting device
JP5698498B2 (en) * 2010-11-10 2015-04-08 旭化成イーマテリアルズ株式会社 Light beam control unit, direct type backlight device, and liquid crystal display device
JP2021015254A (en) * 2019-07-16 2021-02-12 Ｍｃｃアドバンスドモールディングス株式会社 Optical component
CN110609414A (en) * 2019-08-13 2019-12-24 深圳市德仓科技有限公司 Backlight based on diffusion printing ink and manufacturing method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000182418A (en) * 1998-12-16 2000-06-30 Kuraray Co Ltd Lighting device with light diffusion plate
JP2001351424A (en) * 2000-06-06 2001-12-21 Fuji Electric Ind Co Ltd Plane light-emitting device
JP4198372B2 (en) * 2002-03-22 2008-12-17 株式会社日立製作所 Liquid crystal display
JP2005117023A (en) * 2003-09-19 2005-04-28 Sony Corp Backlight apparatus and liquid crystal display device
KR100657284B1 (en) * 2004-11-03 2006-12-14 삼성전자주식회사 Backlight unit and LCD using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9341754B2 (en) 2009-09-11 2016-05-17 Asahi Kasei E-Materials Corporation Light diffuser for point light source and direct type point light source backlight device
US12230518B2 (en) 2017-04-18 2025-02-18 SCREEN Holdings Co., Ltd. Light irradiation type heat treatment apparatus

Also Published As

Publication number Publication date
JPWO2008050763A1 (en) 2010-02-25
WO2008050763A1 (en) 2008-05-02

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