JP2011053238A - 液晶表示装置及びバックライト装置 - Google Patents
液晶表示装置及びバックライト装置 Download PDFInfo
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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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
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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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
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- H—ELECTRICITY
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- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/644—Heat extraction or cooling elements in intimate contact or integrated with parts of the device other than the semiconductor body
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- H—ELECTRICITY
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
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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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from 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
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
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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
- 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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- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0085—Means for removing heat created by the light source from the package
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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
- G02F1/133628—Illuminating devices with cooling means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10431—Details of mounted components
- H05K2201/10507—Involving several components
- H05K2201/10545—Related components mounted on both sides of the PCB
Abstract
LEDを用いたバックライト装置を備えた液晶表示装置において、装置の高温化を抑制するのに好適な技術を提供する。
【解決手段】
本発明に係るバックライト装置は、光源としての複数のLED(101)と、LEDからの光が入射され、該入射光を面状光にして液晶パネル(106)側に導く導光板(104)と、複数のLEDに電流を供給するためのLEDドライバ(107)と、複数のLEDとLEDドライバが実装されるLED駆動基板(102)とを有し、LED駆動基板の一方の面に複数の発光ダイオードが実装されるとともに導光板が設けられ、他方の面にLEDドライバが実装される。
【選択図】 図2
Description
102…LED駆動基板
103…反射シート
104…導光板
104’…導光板ブロック
105…拡散板
106…液晶パネル
107…LEDドライバ
108…ベースシャーシ
109…背面カバー
110…放熱シート
121…支持部材
122…取付金具
123…固定部材
124…ネジ
140、141…コネクタ
171…電気部品
201…光学シート
202…モールドフレーム
401…制御信号
402…駆動電流
410…電源回路
420…制御回路
131a…第一のLED列
131b…第二のLED列
Claims (14)
- 液晶パネルに光を照射するためのバックライト装置を備えた液晶表示装置において、
前記バックライト装置は、
光源としての複数の発光ダイオードと、該発光ダイオードからの光が入射され、該入射光を面状光にして前記液晶パネル側に導く導光板と、前記複数の発光ダイオードに電流を供給するためのLEDドライバと、前記複数の発光ダイオードと前記LEDドライバが実装されるLED駆動基板とを有し、
前記LED駆動基板の一方の面に前記複数の発光ダイオードが実装されるとともに前記導光板が設けられ、前記LED駆動基板の、前記複数の発光ダイオードが実装される一方の面とは反対の他方の面に前記LEDドライバが実装されることを特徴とする液晶表示装置。 - 請求項1に記載の液晶表示装置において、前記LED駆動基板の他方の面の、前記複数の発光ダイオードの実装部分を含む所定領域以外の領域に、前記LEDドライバが実装されることを特徴とする液晶表示装置。
- 請求項2に記載の液晶表示装置において、更に、前記LED駆動基板の他方の面側に設けられた金属製のシャーシ部材を備え、前記LEDドライバと前記シャーシ部材とを、放熱シートを介して接続したことを特徴とする液晶表示装置。
- 請求項3に記載の液晶表示装置において、更に、前記LED駆動基板の他方の面における前記所定領域と前記シャーシ部材とを、放熱シートを介して接続したことを特徴とする液晶表示装置。
- 請求項2に記載の液晶表示装置において、前記LEDドライバ以外の回路素子が、前記LEDドライバとともに、前記LED駆動基板の他方の面における前記所定領域以外の領域に実装されることを特徴とする液晶表示装置。
- 請求項2に記載の液晶表示装置において、前記複数の発光ダイオードが前記LED駆動基板の一方の面において所定方向に直線状に配列されており、前記LED駆動基板の、前記複数の発光ダイオードの配列方向と直交する方向の断面において、前記LED駆動基板の他方の面における前記所定領域が、10〜15mmの幅を持つことを特徴とする液晶表示装置。
- 請求項1に記載の液晶表示装置において、前記LED駆動基板の他方の面に実装された前記LEDドライバが、前記発光ダイオードの実装部分に対して所定距離離れていることを特徴とする液晶表示装置。
- 請求項7に記載の液晶表示装置において、前記所定距離が20〜200mmであることを特徴とする液晶表示装置。
- 請求項1に記載の液晶表示装置において、前記導光板は、少なくとも第1及び第2の導光板を含み、前記LED駆動基板の一方の面には、前記第1導光板用の複数の発光ダイオードと前記第2導光板用の複数の発光ダイオードとがそれぞれ所定方向に配列され、
前記LED駆動基板の他方の面において、前記第1導光板用の発光ダイオード列と前記第2導光板用の発光ダイオード列との中間線を含むように、前記LEDドライバが実装されることを特徴とする液晶表示装置。 - 請求項1に記載の液晶表示装置において、前記LED駆動基板の一方の面に実装された複数の発光ダイオードの発光強度を前記LED駆動基板の他方の面に実装された前記LEDドライバにより個別に制御することにより、表示映像の明るさをエリア毎に制御可能にしたことを特徴とする液晶表示装置。
- 請求項1に記載の液晶表示装置において、前記LED駆動基板の一方の面には、前記導光板が複数設けられ、かつ、複数の発光ダイオードを所定方向に配列した発光ダイオード列が前記各導光板にそれぞれ対応して実装されており、
前記LED駆動基板の他方の面に実装された前記LEDドライバが、前記各導光板にそれぞれ対応する前記発光ダイオード列の発光強度を個別に制御するようにしたことを特徴とする液晶表示装置。 - 請求項1に記載の液晶表示装置において、前記LED駆動基板が前記液晶パネルの背面側において複数配列されており、該LED駆動基板の配列位置に応じて該LED駆動基板の寸法または面積が異なっていることを特徴とする液晶表示装置。
- 液晶パネルに光を照射するためのバックライト装置を備えた液晶表示装置において、
前記バックライト装置は、
光源としての複数の発光ダイオードと、前記複数の発光ダイオードに電流を供給するためのLEDドライバと、前記複数の発光ダイオードと前記LEDドライバが実装されるLED駆動基板とを有し、
前記LED駆動基板の一方の面に前記複数の発光ダイオードが実装され、前記複数の発光ダイオードが実装される一方の面とは反対の他方の面に前記LEDドライバが実装されることを特徴とする液晶表示装置。 - 液晶パネルに光を照射するためのバックライト装置において、
光源としての複数の発光ダイオードと、該発光ダイオードからの光が入射され、該入射光を面状光にして前記液晶パネル側に導く導光板と、前記複数の発光ダイオードに電流を供給するためのLEDドライバと、前記複数の発光ダイオードと前記LEDドライバが実装されるLED駆動基板とを有し、
前記LED駆動基板の一方の面に前記複数の発光ダイオードが実装されるとともに前記導光板が設けられ、前記LED駆動基板の、前記複数の発光ダイオードが実装される一方の面とは反対の他方の面に前記LEDドライバが実装されることを特徴とするバックライト装置。
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JP2009199209A JP2011053238A (ja) | 2009-08-31 | 2009-08-31 | 液晶表示装置及びバックライト装置 |
US12/788,019 US20110050654A1 (en) | 2009-08-31 | 2010-05-26 | Liquid crystal display apparatus and back light apparatus |
CN2010101985483A CN102004353A (zh) | 2009-08-31 | 2010-06-04 | 液晶显示装置和背光源装置 |
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Cited By (3)
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KR20120036661A (ko) * | 2010-10-08 | 2012-04-18 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 액정표시장치 모듈 |
KR101835529B1 (ko) | 2011-08-09 | 2018-03-08 | 삼성디스플레이 주식회사 | 표시 장치 및 이에 사용되는 광원 패키지 |
JP2019013520A (ja) * | 2017-07-07 | 2019-01-31 | 株式会社オリンピア | 遊技機 |
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JP2012085165A (ja) * | 2010-10-13 | 2012-04-26 | Sony Corp | 液晶表示装置及び液晶表示装置の制御方法 |
JP2012099629A (ja) * | 2010-11-02 | 2012-05-24 | Funai Electric Co Ltd | Led照明装置およびケーブル接続検知装置 |
US8362497B2 (en) * | 2010-11-22 | 2013-01-29 | Hsu Li Yen | LED lamp with improved die arrangement |
US9271379B2 (en) * | 2012-11-16 | 2016-02-23 | Apple Inc. | Redundant operation of a backlight unit of a display device under open circuit or short circuit LED string conditions |
CN105405412B (zh) * | 2015-12-23 | 2017-11-03 | 深圳Tcl新技术有限公司 | 背光驱动控制方法和系统 |
CN109192149B (zh) * | 2018-10-31 | 2020-05-15 | 京东方科技集团股份有限公司 | 背光驱动装置及其驱动方法、背光模组及显示装置 |
CN111341274A (zh) * | 2019-08-07 | 2020-06-26 | Tcl集团股份有限公司 | 一种背光组件、驱动方法以及显示装置 |
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JP4297021B2 (ja) * | 2004-09-27 | 2009-07-15 | セイコーエプソン株式会社 | 電気光学装置、照明装置及び電子機器 |
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JP2008299182A (ja) * | 2007-06-01 | 2008-12-11 | Hitachi Ltd | 液晶表示装置 |
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-
2010
- 2010-05-26 US US12/788,019 patent/US20110050654A1/en not_active Abandoned
- 2010-06-04 CN CN2010101985483A patent/CN102004353A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009016853A1 (ja) * | 2007-07-27 | 2009-02-05 | Sharp Kabushiki Kaisha | 照明装置、及びこれを用いた表示装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20120036661A (ko) * | 2010-10-08 | 2012-04-18 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 액정표시장치 모듈 |
KR101706578B1 (ko) | 2010-10-08 | 2017-02-16 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 액정표시장치 모듈 |
KR101835529B1 (ko) | 2011-08-09 | 2018-03-08 | 삼성디스플레이 주식회사 | 표시 장치 및 이에 사용되는 광원 패키지 |
JP2019013520A (ja) * | 2017-07-07 | 2019-01-31 | 株式会社オリンピア | 遊技機 |
Also Published As
Publication number | Publication date |
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US20110050654A1 (en) | 2011-03-03 |
CN102004353A (zh) | 2011-04-06 |
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