JP2006019141A - バックライト及びそのバックライトを備えた液晶表示装置 - Google Patents
バックライト及びそのバックライトを備えた液晶表示装置 Download PDFInfo
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- 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
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- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
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- 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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- 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
- G02F1/133603—Direct backlight with LEDs
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- 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
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
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- 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
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- 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
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- 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
- G02B6/0073—Light emitting diode [LED]
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
【解決手段】 LEDアレイ基板2に配置された側面発光型赤色LED1R、側面発光型緑色LED1G及び側面発光型青色LED1Bより側面方向に出射された光は、導光板3へ溝状凹部3Aの側面から導入され、導光板3を伝播し、三色の混色が起きる。光は導光板3の両方の端面32で反射シート41などの働きで反射し、さらに導光板3を伝播し、色の混色が進む。さらに、導光板3の下面に設けられた拡散・反射手段31により上方へ反射され、拡散シート5を介して、バックライト光として外部へ出射される。
【選択図】 図1
Description
(作用)
本発明のバックライトでは、側面発光型の発光素子が出射した光は、その周囲の導光板の凹部から導光板に入射し、導光板を伝播しながら各発光素子が出射した光の混合が生じる。すなわち、導光板の凹部が溝状凹部の場合には、側面発光型の発光素子の出射された光が発光素子の両側の導光板に入射して、光の混合が生じる。また、導光板の凹部が穴状凹部の場合には、側面発光型の発光素子の周囲の全方位へ出射された光が導光板に入射して、光の混合が生じる。
導光板3は、上面、下面及びその間の端面32を有し、下面には凹部が形成され、入射された光を混合し上面から照射光として出射する。本実施の形態では導光板3の凹部は、溝状凹部3Aとしている。導光板3の下面(溝状凹部3Aが形成されている面)には、ドット、シボ等の拡散・反射手段31が講じてあり、導光板3内に入射した光を拡散するとともに、導光板3の出射面側へと反射する。さらに、導光板3の下面には反射シート4を配置しており、導光板3の上面には拡散シート5を配置している。このような導光板3の溝状凹部3Aに、LEDアレイ基板2に配列された側面発光型LED1R、LED1G及び1Bを配置している。また、必要に応じて、導光板3の側端面32には、白色あるいは鏡面の反射シート41を配置しても良く、更には、導光板3の側端面32がその上面あるいは下面の方向に傾斜していても良い。
[発明の他の実施の形態]
1R 側面発光型赤色LED
1G 側面発光型緑色LED
1B 側面発光型青色LED
2 LEDアレイ基板
3 導光板
31 拡散・反射手段
32 端面
33 緩傾斜面
34 急傾斜面
3A 溝状凹部
3B 穴状凹部
4 反射シート
5 拡散シート
100、110 バックライト
101 液晶パネル
102 フレーム
Claims (10)
- 上面、下面及びその間の端面を有する導光板であって、前記下面には凹部が形成され、入射された光を混合し前記上面から照射光を出射する導光板と、アレイ基板に配列して搭載された複数の側面発光型発光素子であって、前記導光板の前記凹部に配置される複数の側面発光型発光素子とを備えることを特徴とするバックライト。
- 前記導光板の凹部は溝状凹部であり、前記溝状凹部に前記複数の側面発光型発光素子が配置されていることを特徴とする請求項1記載のバックライト。
- 前記導光板の溝状凹部は前記導光板を貫通しており、前記溝状凹部に前記複数の側面発光型発光素子が配置されていることを特徴とする請求項2記載のバックライト。
- 前記導光板の前記下面にはプリズム状の凹凸が形成されていることを特徴とする請求項1又は請求項2記載のバックライト。
- 前記導光板の凹部は複数の穴状凹部であり、前記複数の穴状凹部に前記複数の側面発光型発光素子がそれぞれ配置されることを特徴とする請求項1記載のバックライト。
- 前記複数の側面発光型発光素子は、側面発光型発光ダイオードであることを特徴とする請求項1乃至請求項5のいずれか一項に記載のバックライト。
- 前記複数の側面発光型発光素子は、側面発光型赤色LED、側面発光型緑色LED及び側面発光型青色LEDであることを特徴とする請求項1乃至請求項6のいずれか一項に記載のバックライト。
- 上面、下面及びその間の端面を有する導光板であって、前記下面には凹部が形成され、入射された光を混合し前記上面から照射光を出射する導光板、及びアレイ基板に配列されて搭載された複数の側面発光型発光素子であって、前記導光板の前記凹部に配置される複数の側面発光型発光素子を備えるバックライトと、前記バックライトの照射光を受ける液晶パネルと、前記バックライト及び前記液晶パネルを収容するフレームとを有する液晶表示装置。
- 前記バックライトが複数個併設して設けられ、これら複数個のバックライトからの照射光を前記液晶パネルが受けることを特徴とする請求項8記載の液晶表示装置。
- 前記複数個のバックライトは順次点灯されることを特徴とする請求項9記載の液晶表示装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004195880A JP4535792B2 (ja) | 2004-07-01 | 2004-07-01 | バックライト及びそのバックライトを備えた液晶表示装置 |
TW094120573A TW200613847A (en) | 2004-07-01 | 2005-06-21 | Backlight unit and liquid crystal display device using the same |
KR1020050057919A KR100774224B1 (ko) | 2004-07-01 | 2005-06-30 | 백라이트 유닛 및 그 백라이트 유닛을 이용한 액정 표시장치 |
US11/170,443 US20060002146A1 (en) | 2004-07-01 | 2005-06-30 | Backlight unit and liquid crystal display device using the same |
CNA2005100820868A CN1716042A (zh) | 2004-07-01 | 2005-07-01 | 背光单元及使用其的液晶显示设备 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2004195880A JP4535792B2 (ja) | 2004-07-01 | 2004-07-01 | バックライト及びそのバックライトを備えた液晶表示装置 |
Publications (2)
Publication Number | Publication Date |
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JP2006019141A true JP2006019141A (ja) | 2006-01-19 |
JP4535792B2 JP4535792B2 (ja) | 2010-09-01 |
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Application Number | Title | Priority Date | Filing Date |
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JP2004195880A Expired - Fee Related JP4535792B2 (ja) | 2004-07-01 | 2004-07-01 | バックライト及びそのバックライトを備えた液晶表示装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060002146A1 (ja) |
JP (1) | JP4535792B2 (ja) |
KR (1) | KR100774224B1 (ja) |
CN (1) | CN1716042A (ja) |
TW (1) | TW200613847A (ja) |
Cited By (21)
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JP2008004948A (ja) * | 2006-06-09 | 2008-01-10 | Philips Lumileds Lightng Co Llc | 低プロファイルの側面放射led |
JP2008053069A (ja) * | 2006-08-25 | 2008-03-06 | Hitachi Lighting Ltd | 発光ダイオード |
WO2008029540A1 (fr) * | 2006-09-08 | 2008-03-13 | Sharp Kabushiki Kaisha | Dispositif d'illumination, élément d'émission de lumière et composant d'affichage à cristaux liquides |
JP2010092956A (ja) * | 2008-10-06 | 2010-04-22 | Mitsubishi Electric Corp | Led光源及びそれを用いた発光体 |
JP2011128599A (ja) * | 2009-12-16 | 2011-06-30 | Samsung Electronics Co Ltd | バックライトユニット及びこれを有するディスプレイ装置 |
EP2385401A1 (en) | 2010-05-06 | 2011-11-09 | Funai Electric Co., Ltd. | Planar light-emitting device |
JP2012503782A (ja) * | 2008-09-24 | 2012-02-09 | フィリップス ルミレッズ ライティング カンパニー リミテッド ライアビリティ カンパニー | 背面表面へ光学的に結合されるledを有する薄型エッジバックライト |
JP2012118382A (ja) * | 2010-12-02 | 2012-06-21 | Panasonic Liquid Crystal Display Co Ltd | 液晶表示装置 |
JP2012209089A (ja) * | 2011-03-29 | 2012-10-25 | Jvc Kenwood Corp | バックライト装置 |
JP2012227537A (ja) * | 2012-06-19 | 2012-11-15 | Mitsubishi Electric Corp | Led光源及びそれを用いた発光体 |
WO2013019023A3 (en) * | 2011-07-29 | 2013-04-25 | Lg Innotek Co., Ltd. | Lighting device and liquid crystal display device having the same |
JP2013118244A (ja) * | 2011-12-02 | 2013-06-13 | Citizen Holdings Co Ltd | 半導体発光装置及びそれを用いた照明装置 |
JP2013143430A (ja) * | 2012-01-10 | 2013-07-22 | Citizen Holdings Co Ltd | 半導体発光装置及びそれを用いた照明装置 |
WO2013121862A1 (ja) * | 2012-02-14 | 2013-08-22 | コニカミノルタ株式会社 | 光源ユニット |
US8646932B2 (en) | 2010-06-15 | 2014-02-11 | Lg Innotek Co., Ltd. | Backlight unit and the display device having the same |
KR101415582B1 (ko) * | 2011-07-29 | 2014-07-08 | 엘지이노텍 주식회사 | 조명장치 및 이를 이용한 액정표시장치 |
KR101559544B1 (ko) | 2014-12-02 | 2015-10-15 | 권순철 | 방범용 cctv 안전표지판 |
JP2016045992A (ja) * | 2014-08-20 | 2016-04-04 | 三菱電機株式会社 | 面光源装置および液晶表示装置 |
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JP5166422B2 (ja) * | 2006-10-16 | 2013-03-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 照明装置 |
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- 2005-06-30 US US11/170,443 patent/US20060002146A1/en not_active Abandoned
- 2005-07-01 CN CNA2005100820868A patent/CN1716042A/zh active Pending
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JP2008004948A (ja) * | 2006-06-09 | 2008-01-10 | Philips Lumileds Lightng Co Llc | 低プロファイルの側面放射led |
JP2008053069A (ja) * | 2006-08-25 | 2008-03-06 | Hitachi Lighting Ltd | 発光ダイオード |
WO2008029540A1 (fr) * | 2006-09-08 | 2008-03-13 | Sharp Kabushiki Kaisha | Dispositif d'illumination, élément d'émission de lumière et composant d'affichage à cristaux liquides |
US8284347B2 (en) | 2006-09-08 | 2012-10-09 | Sharp Kabushiki Kaisha | Illumination device, light emitting element, and liquid crystal display device |
JP2012503782A (ja) * | 2008-09-24 | 2012-02-09 | フィリップス ルミレッズ ライティング カンパニー リミテッド ライアビリティ カンパニー | 背面表面へ光学的に結合されるledを有する薄型エッジバックライト |
JP2010092956A (ja) * | 2008-10-06 | 2010-04-22 | Mitsubishi Electric Corp | Led光源及びそれを用いた発光体 |
JP2011128599A (ja) * | 2009-12-16 | 2011-06-30 | Samsung Electronics Co Ltd | バックライトユニット及びこれを有するディスプレイ装置 |
EP2385401A1 (en) | 2010-05-06 | 2011-11-09 | Funai Electric Co., Ltd. | Planar light-emitting device |
US8641252B2 (en) | 2010-05-06 | 2014-02-04 | Funai Electric Co., Ltd. | Planar light-emitting device |
US8646932B2 (en) | 2010-06-15 | 2014-02-11 | Lg Innotek Co., Ltd. | Backlight unit and the display device having the same |
JP2012118382A (ja) * | 2010-12-02 | 2012-06-21 | Panasonic Liquid Crystal Display Co Ltd | 液晶表示装置 |
JP2012209089A (ja) * | 2011-03-29 | 2012-10-25 | Jvc Kenwood Corp | バックライト装置 |
KR101836112B1 (ko) * | 2011-06-30 | 2018-03-09 | 엘지이노텍 주식회사 | 백라이트 유닛 및 이를 포함하는 표시 장치 |
TWI501007B (zh) * | 2011-07-29 | 2015-09-21 | Lg Innotek Co Ltd | 發光裝置及具有其之液晶顯示裝置 |
KR101415582B1 (ko) * | 2011-07-29 | 2014-07-08 | 엘지이노텍 주식회사 | 조명장치 및 이를 이용한 액정표시장치 |
WO2013019023A3 (en) * | 2011-07-29 | 2013-04-25 | Lg Innotek Co., Ltd. | Lighting device and liquid crystal display device having the same |
US9863587B2 (en) | 2011-07-29 | 2018-01-09 | Lg Innotek Co., Ltd. | Lighting device and liquid crystal display device having the same |
JP2013118244A (ja) * | 2011-12-02 | 2013-06-13 | Citizen Holdings Co Ltd | 半導体発光装置及びそれを用いた照明装置 |
JP2013143430A (ja) * | 2012-01-10 | 2013-07-22 | Citizen Holdings Co Ltd | 半導体発光装置及びそれを用いた照明装置 |
WO2013121862A1 (ja) * | 2012-02-14 | 2013-08-22 | コニカミノルタ株式会社 | 光源ユニット |
JP2012227537A (ja) * | 2012-06-19 | 2012-11-15 | Mitsubishi Electric Corp | Led光源及びそれを用いた発光体 |
JP2016045992A (ja) * | 2014-08-20 | 2016-04-04 | 三菱電機株式会社 | 面光源装置および液晶表示装置 |
KR101559544B1 (ko) | 2014-12-02 | 2015-10-15 | 권순철 | 방범용 cctv 안전표지판 |
JP2019513300A (ja) * | 2015-03-20 | 2019-05-23 | ロヒンニ リミテッド ライアビリティ カンパニー | 光拡散の方法と装置 |
WO2019225877A1 (ko) * | 2018-05-24 | 2019-11-28 | 엘지이노텍 주식회사 | 조명 모듈 및 이를 구비한 조명 장치 |
US11742465B2 (en) | 2018-05-24 | 2023-08-29 | Lg Innotek Co., Ltd. | Lighting module and lighting apparatus having same |
Also Published As
Publication number | Publication date |
---|---|
TW200613847A (en) | 2006-05-01 |
KR100774224B1 (ko) | 2007-11-07 |
JP4535792B2 (ja) | 2010-09-01 |
CN1716042A (zh) | 2006-01-04 |
US20060002146A1 (en) | 2006-01-05 |
KR20060049253A (ko) | 2006-05-18 |
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