JP5394387B2 - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
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- JP5394387B2 JP5394387B2 JP2010533851A JP2010533851A JP5394387B2 JP 5394387 B2 JP5394387 B2 JP 5394387B2 JP 2010533851 A JP2010533851 A JP 2010533851A JP 2010533851 A JP2010533851 A JP 2010533851A JP 5394387 B2 JP5394387 B2 JP 5394387B2
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/18—Controlling the intensity of the light using temperature feedback
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- 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
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- G02F1/133603—Direct backlight with LEDs
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- 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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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
10a 画素領域
11 カラーフィルタ基板(CF基板、透光性基板)
12 アレイ基板(TFT基板、透光性基板)
13 液晶層
15 シール材
17、18 偏光板
20 バックライト
22 発光ダイオード(光源)
22a 配線
24 バックライトシャーシ
25 反射基板
25a 反射面(液晶パネルに対向する面)
26 光学シート
28 サーミスタ(温度センサ)
28a 配線
30 ベゼル
32 フレーム
41 ガラス基板(アレイ基板のガラス基板)
42 画素電極
43a〜43c バスライン
44 平坦化層
46 配向膜
47 薄膜トランジスタ
51 ガラス基板(カラーフィルタ基板のガラス基板)
52 ブラックマトリクス
53 カラーフィルタ
54 平坦化層
55 対向電極
56 配向膜
59 スペーサ
100 液晶表示装置
200 制御部
201 発光制御部
202 目標電圧記憶部
203 基準電圧記憶部
241 端子基板
242 電源基板
243 ACインレット基板
244 液晶コントローラ基板
245 メイン基板
246 LEDコントロール基板
L 発光ダイオードのVF値の下限値
t0 基準温度
v0 基準電圧
v1 発光ダイオードに印加する電圧の目標値
Claims (12)
- 液晶表示部の背面に複数の発光ダイオードが配置された液晶表示装置であって、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタと、
前記発光ダイオードに印加する電圧を制御する発光制御部と、
を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、温度が高くなると前記発光ダイオードに印加する電圧の目標値を低くし、温度が低くなると前記発光ダイオードに印加する電圧の目標値を高くし、
前記サーミスタから取得される温度情報と、前記発光ダイオードに印加する電圧の目標値との関係を予め記憶した目標電圧記憶部を備え、
前記発光制御部は、前記サーミスタから取得される温度情報と、前記目標電圧記憶部に記憶された温度情報と電圧の目標値との関係とに基づいて、前記発光ダイオードに印加する電圧の目標値を設定する、液晶表示装置。 - 液晶表示部の背面に複数の発光ダイオードが配置された液晶表示装置であって、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタと、
前記発光ダイオードに印加する電圧を制御する発光制御部と、
を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、温度が高くなると前記発光ダイオードに印加する電圧の目標値を低くし、温度が低くなると前記発光ダイオードに印加する電圧の目標値を高くし、
発光ダイオードに印加する電圧の目標値について、基準電圧を記憶した基準電圧記憶部を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、前記基準電圧記憶部に記憶された基準電圧を補正して、前記発光ダイオードに印加する電圧の目標値を設定する、液晶表示装置。 - 前記複数の発光ダイオードが配置された領域に、複数のサーミスタが分散して配置されており、
前記発光制御部は、複数の発光ダイオードが配置された領域を複数の区域に分け、前記サーミスタに基づいて各区域の温度情報を取得し、前記区域毎に前記発光ダイオードに印加する電圧の目標値を設定する、請求項1又は2に記載の液晶表示装置。 - 前記発光ダイオードに印加する電圧の目標値は、前記発光ダイオードのVF値の下限値に基づいて設定される、請求項1から3までの何れか一項に記載の液晶表示装置。
- 前記複数の発光ダイオードは、合成されて白色光を形成するR、G、Bの光を発する3種類の発光ダイオードを含み、
前記発光制御部は、前記サーミスタから取得される温度情報に対して、前記発光ダイオードに印加する電圧の目標値を、R、G、Bの光を発する発光ダイオードで異ならせる、請求項1から4までの何れか一項に記載の液晶表示装置。 - 前記複数の発光ダイオードは、合成されて白色光を形成するR、G、Bの光を発する3種類の発光ダイオードを含み、
前記発光制御部は、Rの光を発する発光ダイオードと、G、Bの光を発する発光ダイオードとで、前記サーミスタから取得される温度情報に対して、前記発光ダイオードに印加する電圧の目標値を異ならせる、請求項1から4までの何れか一項に記載の液晶表示装置。 - 前記サーミスタは、金属の酸化物を混合した焼結体を用いて構成されている、請求項1から6までの何れか一項に記載の液晶表示装置。
- 発光ダイオードに対するサーミスタの数が部分的にばらついている、請求項1から7までの何れか一項に記載の液晶表示装置。
- 液晶表示装置の液晶表示部の背面を照明するバックライトであって、
液晶表示部の背面に対向するように配置された複数の発光ダイオードと、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタと、
前記発光ダイオードに印加する電圧を制御する発光制御部と、
を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、温度が高くなると前記発光ダイオードに印加する電圧の目標値を低くし、温度が低くなると前記発光ダイオードに印加する電圧の目標値を高くし、
前記サーミスタから取得される温度情報と、前記発光ダイオードに印加する電圧の目標値との関係を予め記憶した目標電圧記憶部を備え、
前記発光制御部は、前記サーミスタから取得される温度情報と、前記目標電圧記憶部に記憶された温度情報と電圧の目標値との関係とに基づいて、前記発光ダイオードに印加する電圧の目標値を設定する、液晶表示装置用のバックライト。 - 液晶表示装置の液晶表示部の背面を照明するバックライトであって、
液晶表示部の背面に対向するように配置された複数の発光ダイオードと、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタと、
前記発光ダイオードに印加する電圧を制御する発光制御部と、
を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、温度が高くなると前記発光ダイオードに印加する電圧の目標値を低くし、温度が低くなると前記発光ダイオードに印加する電圧の目標値を高くし、
発光ダイオードに印加する電圧の目標値について、基準電圧を記憶した基準電圧記憶部を備え、
前記発光制御部は、前記サーミスタから取得される温度情報に基づいて、前記基準電圧記憶部に記憶された基準電圧を補正して、前記発光ダイオードに印加する電圧の目標値を設定する、液晶表示装置用のバックライト。 - 液晶表示部の背面に複数の発光ダイオードが配置されたバックライトを備えた液晶表示装置用バックライトの制御方法であって、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタから温度情報を取得する第1ステップと、
前記第1ステップによって取得された温度情報に基づいて、予め記憶した温度情報と電圧の目標値との関係から前記発光ダイオードに印加する電圧の目標値を設定する第2ステップと、
前記第2ステップで設定された電圧の目標値に基づいて、前記発光ダイオードに印加する電圧を制御する第3ステップと、
を備えた、液晶表示装置用バックライトの制御方法。 - 液晶表示部の背面に複数の発光ダイオードが配置されたバックライトを備えた液晶表示装置用バックライトの制御方法であって、
前記複数の発光ダイオードが配置された領域に、前記発光ダイオードとは別個に設けられたサーミスタから温度情報を取得する第1ステップと、
前記発光ダイオードに印加する電圧の目標値について予め記憶した基準電圧を、前記第1ステップによって取得された温度情報に基づいて補正して、前記発光ダイオードに印加する電圧の目標値を設定する第2ステップと、
前記第2ステップで設定された電圧の目標値に基づいて、前記発光ダイオードに印加する電圧を制御する第3ステップと、
を備えた、液晶表示装置用バックライトの制御方法。
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CN108877642A (zh) * | 2017-05-12 | 2018-11-23 | 京东方科技集团股份有限公司 | 发光组件、显示基板和显示装置 |
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