CN1979265A - 液晶显示面板 - Google Patents

液晶显示面板 Download PDF

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Publication number
CN1979265A
CN1979265A CNA2005101022808A CN200510102280A CN1979265A CN 1979265 A CN1979265 A CN 1979265A CN A2005101022808 A CNA2005101022808 A CN A2005101022808A CN 200510102280 A CN200510102280 A CN 200510102280A CN 1979265 A CN1979265 A CN 1979265A
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substrate
pixel
display panels
sub
test
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CN100426059C (zh
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李利亚
陈益莹
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Innolux Shenzhen Co Ltd
Innolux Corp
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Innolux Shenzhen Co Ltd
Innolux Display Corp
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Priority to CNB2005101022808A priority Critical patent/CN100426059C/zh
Priority to US11/636,225 priority patent/US20070132689A1/en
Publication of CN1979265A publication Critical patent/CN1979265A/zh
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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
    • 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
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

本发明提供一种液晶显示面板，其包括一第一基板、第二基板和一夹于该第一基板和第二基板间的液晶层，该第一基板和第二基板相对设置并形成多个呈行列排布用于显示图像的像素，其中，该第一基板包括一像素测试点，该像素测试点与一像素形成电连接。在调节及校正本发明液晶显示面板灰阶电压时可以不采用光学装置，而通过像素测试点直接由示波器检测波形并用调节装置调节和校正灰阶电压，因此便于调节。

Description

液晶显示面板
【技术领域】
本发明是关于一种液晶显示面板，特别是关于一种便于调节灰阶电压的液晶显示面板。
【背景技术】
在液晶显示器(Liquid Crystal Display，LCD)中人们肉眼所见的一个点，即一个像素，其是由红、绿、蓝(R、G、B)三个子像素组成。每一个子像素背后的光源都可显现出不同级别的亮度，而灰阶代表由最暗到最亮之间不同亮度的层次级别。中间层级越多，所能够呈现的画面效果也越细腻。以8比特(Bit)液晶显示面板为例，能表现28＝256个亮度层次，就称之为256灰阶。液晶显示器上每个像素都由不同亮度层次的红、绿、蓝组合起来，最终形成不同的色彩点。也即液晶显示器上每一个点的色彩变化，都是由构成这个点的三个红、绿、蓝子像素的灰阶电压变化所引起。
伽马值是指不同灰阶与亮度的关系。将0～255灰阶设为x轴，各阶亮度与白画面亮度的百分比设为y轴，其二维关系曲线就叫做伽马曲线。伽马曲线通常不会是一条直线，因为人眼对不同亮度有不同辨识的效果，一般来说，液晶显示器的伽马值设定为2.2。
请参考图1，是一种现有技术利用光学装置调节液晶显示器灰阶电压的示意图。该光学装置100首先测定液晶显示器200的伽马值，然后根据厂商需求的伽马值，调节液晶显示器200至所需要的每一灰阶对应的电压值。举例说明，例如厂商需要的伽马值为2.2，则该光学装置100将液晶显示器200各红、绿、蓝值0～255灰阶的伽马值测定，并从屏幕300上对照表的1024个灰阶中挑选出符合伽马值为2.2的256个灰阶，然后调节液晶显示器200的伽马值为2.2。
请一起参考图2，是亮度百分比和对应灰阶示意图。图2中的I和图2中的II都是256灰阶的表现，曲线A是未经调节的伽马值，曲线B是调节后伽马值为2.2。图2中的I是未经调节的伽马值A所表现的灰阶变化，图2中的II是经调节的伽马值B所表现的灰阶变化，从图中可以看出，图2中的I中部分灰阶的亮度相同，灰阶亮度并非随着相应灰阶逐级变化；图2中的II中灰阶亮度随着相应灰阶逐级变化，因此调节后的液晶显示器较未经调节的液晶显示器色彩表现一致。
该调节灰阶电压的方法是通过光学装置100完成。但是光学装置100价格昂贵、体积大于操作时很不方便并且该种方法调节灰阶电压复杂、花费时间长。
【发明内容】
为了克服现有技术通过光学装置调节灰阶电压复杂、花费时间的缺陷，有必要提供一种调节灰阶电压方便的液晶显示面板。
一种液晶显示面板，其包括一第一基板、第二基板和一夹于该第一基板和第二基板间的液晶层，该第一基板和第二基板相对设置并形成多个呈行列排布用于显示图像的像素，其中，该第一基板包括一像素测试点，该像素测试点与一像素形成电连接。
相较于现有技术，本发明液晶显示面板具有一像素测试点，通过示波器等电学装置检测波形，并用调节装置改变该像素测试点的灰阶电压以达到所需要伽马值对应的灰阶电压，因此无需采用光学装置即可调节液晶显示面板的灰阶电压。
【附图说明】
图1是一种现有技术利用光学装置调节液晶显示器灰阶电压的示意图。
图2是亮度百分比和对应灰阶示意图。
图3是本发明的液晶显示面板示意图。
【具体实施方式】
请参考图3，是本发明的液晶显示面板示意图。该液晶显示面板10包括第一基板2、第二基板4和一位于该第一基板2和第二基板4之间的液晶层(图未示)，该第一基板2和第二基板4相对设置并对应形成多个呈行列排布用于显示图像的像素5。该像素5包括子像素51、52和53，分别显示为红、绿、蓝。该第一基板2是一薄膜晶体管布线基板，其包括驱动IC 26和像素测试点(Pad)21。该像素测试点21包括子像素测试点211、212和213，该像素测试点21邻近驱动IC 26设置，其子像素测试点211、212和213分别与某一像素5的子像素51、52和53形成电连接。当使用示波器等电学装置监测子像素测试点211、212和213电压变化时，由于其分别与某一像素5的子像素51、52和53形成电连接，从而可以监测子像素51、52和53的电压变化。当所需要的伽马值发生变化时，可以根据该伽马值中相应灰阶对应的电压值，用示波器检测波形并用调节装置调节子像素测试点211、212和213的相应灰阶电压。
相较于现有技术，本发明可采用电学装置调节液晶显示面板10的灰阶电压，通过外拉的子像素测试点211、212和213可以调节子像素51、52和53的灰阶电压，从而确定整个液晶显示面板10的灰阶电压。通过该种设计，可以节约最大程度的时间，不用每次调节灰阶电压都需要使用光学装置，而只需给出相应灰阶对应的电压值，就可以通过像素测试点21，直接由示波器来调节相对灰阶的电压。因此在调节灰阶电压时，可以不用光学装置来协助完成灰阶电压调节。示波器等电学装置调节方便、成本低、体积小并且可以实现红、绿、蓝灰阶的单独调节，使红、绿、蓝调节更加精确理想。
本发明液晶显示面板10中子像素测试点211、212和213可以与任意一子像素51、52和53形成电连接，分别在布线允许的情况下尽量做大一些并且大于子像素51、52和53，从而便于测试。该像素测试点21可以位于第一基板2周边区域的任意一位置。

Claims (5)

1.一种液晶显示面板，其包括一第一基板、第二基板和一夹于该第一基板和第二基板间的液晶层，该第一基板和第二基板相对设置并形成多个呈行列排布用于显示图像的像素，其特征在于：该第一基板包括一像素测试点，该像素测试点与一像素形成电连接。
2.如权利要求1所述的液晶显示面板，其特征在于：该像素包括三个子像素分别显示为红、绿、蓝，该像素测试点包括三个子像素测试点并分别与某一像素的红、绿、蓝三个子像素形成电连接。
3.如权利要求1所述的液晶显示面板，其特征在于：该第一基板是薄膜晶体管布线基板，其进一步包括一驱动集成电路，该驱动集成电路邻近该像素测试点设置。
4.如权利要求1所述的液晶显示面板，其特征在于：该像素测试点位于该第一基板周边区域。
5.如权利要求1所述的液晶显示面板，其特征在于：该像素测试点大于该像素。
CNB2005101022808A 2005-12-08 2005-12-08 液晶显示面板 Expired - Fee Related CN100426059C (zh)

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CNB2005101022808A CN100426059C (zh) 2005-12-08 2005-12-08 液晶显示面板
US11/636,225 US20070132689A1 (en) 2005-12-08 2006-12-08 Liquid crystal display panel capable of easily adjusting grayscale voltage

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CNB2005101022808A CN100426059C (zh) 2005-12-08 2005-12-08 液晶显示面板

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KR102326029B1 (ko) * 2015-03-13 2021-11-15 삼성디스플레이 주식회사 데이터 보정 장치 및 이를 포함하는 표시 장치
CN105632396B (zh) * 2016-03-04 2018-08-07 京东方科技集团股份有限公司 一种灰阶电压校准装置、系统、方法及显示装置
JP7335066B2 (ja) * 2017-11-02 2023-08-29 シナプティクス インコーポレイテッド 表示ドライバ、表示装置及び輝度制御方法

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US7081938B1 (en) * 1993-12-03 2006-07-25 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device and method for manufacturing the same
KR100235592B1 (ko) * 1997-01-22 1999-12-15 구본준 평행전계형 액정표시장치
TW539893B (en) * 1998-03-30 2003-07-01 Toshiba Corp Flat-panel display device
US6593934B1 (en) * 2000-11-16 2003-07-15 Industrial Technology Research Institute Automatic gamma correction system for displays
CN1203359C (zh) * 2002-11-12 2005-05-25 统宝光电股份有限公司 平面显示器面板
CN100346221C (zh) * 2004-11-12 2007-10-31 友达光电股份有限公司 液晶显示面板及其测试方法
TWI333094B (en) * 2005-02-25 2010-11-11 Au Optronics Corp System and method for display testing
US7554517B2 (en) * 2005-03-14 2009-06-30 Texas Instruments Incorporated Method and apparatus for setting gamma correction voltages for LCD source drivers

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