CN104765210A - 液晶显示装置及其液晶显示面板 - Google Patents

液晶显示装置及其液晶显示面板 Download PDF

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CN104765210A
CN104765210A CN201510176157.4A CN201510176157A CN104765210A CN 104765210 A CN104765210 A CN 104765210A CN 201510176157 A CN201510176157 A CN 201510176157A CN 104765210 A CN104765210 A CN 104765210A
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electric charge
film transistor
pixel
thin film
tft
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CN104765210B (zh
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陈政鸿
王醉
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/758,230 priority patent/US20160306242A1/en
Priority to PCT/CN2015/078002 priority patent/WO2016165163A1/zh
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Abstract

本发明提供液晶显示装置及其液晶显示面板，其包括上基板、下基板以及液晶层，下基板还包括层叠下共电极与电荷共享片之间的绝缘层，次像素设于绝缘层上并与电荷共享片间隔设置，电荷共享片通过过孔与第三薄膜晶体管电连接并向相邻的次像素端部延伸，并且电荷共享片与相邻的次像素下的下共电极形成电荷共享电容，第三薄膜晶体管的漏极耦接到电荷共享电容，以使得在相邻的次像素与电荷共享电容短时，相邻的两个像素单元显示纯色画面，使得产品的检测方法简单且有效，提高良品率。

Description

液晶显示装置及其液晶显示面板
技术领域
本发明涉显示技术领域，特别是涉及一种液晶显示装置及其液晶显示面板。
背景技术
为了改善垂直取向型(VA型)液晶显示面板在大视角出现的色偏现象，会采用Charge Sharing(电荷分配)的像素设计，即像素分为主像素(Main Pixel)和次像素(Sub Pixel)两个区域。在正常显示时，充电扫描线(Charge Gate)打开，同时电荷共享扫描线(Share Gate)关闭，主像素和像素电极充电到相同电位；随后充电扫描线(Charge Gate)关闭，同时电荷共享扫描线(Share Gate)打开，由于电荷共享电容(Cst3)的作用使得Sub Pixel的电位低于Main Pixel的电位。不同的电位使得两个显示区域的液晶分子转向分布不同，从而具备改善大视角色偏的作用。
在实际产品中，可采用如图1a、1b所示的像素结构，电荷共享电容(Cst3)由ITO(Indium tin oxide，氧化铟锡)层2、金属层3以及两层之间的绝缘层4构成，其中ITO层2通过过孔5(VIA)与电荷共享TFT(T3)6相连接，金属层3为像素共电极(Com)。
如图1c的像素电路的等效电路图，实际生产中可能会出现ITO层残留问题，使得Cst3的ITO层2与次像素电极7连接(如图1b中的短路连接线1)形成短路，导致Charge Sharing功能失效。同样灰阶下存在短路问题的像素单元的次像素会比其他像素单元的次像素更亮，在面板上呈现微亮点现象。厂内通常采用的检测方式是将所有的扫描线同时打开(或分奇偶打开)，并给所有像素充电，使得主像素和次像素都处于同样电位，在这种检测方式下即使出现上述ITO层与次像素电极7间短路的现象也无法有效检出，导致良率下降，产品成本增加。
发明内容
本发明提供一种液晶显示装置及其液晶显示面板，以解决现有技术中ITO层与次像素间短路的现象无法有效检出，导致良率下降，产品成本增加的技术问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种液晶显示面板，包括上基板、下基板以及液晶层，上基板设有上共电极；下基板与上基板相对设置，设有数条数据线、数条充电扫描线、数个间隔设置的像素单元、数条电荷共享扫描线、数条下共电极；液晶层设于上基板和下基板之间；每一像素单元包含分别设于数条下基板上的第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、主像素、与主像素间隔设置的次像素以及设于主像素与次像素之间的电荷共享片；第一薄膜晶体管的栅极耦接到充电扫描线，第一薄膜晶体管的源极则耦接至数据线，第一薄膜晶体管的漏极耦接到主像素；第二薄膜晶体管的栅极耦接到充电扫描线，第二薄膜晶体管的源极则耦接至数据线，第二薄膜晶体管的漏极耦接到次像素；第三薄膜晶体管的栅极耦接到电荷共享扫描线，第三薄膜晶体管的源极则耦接至第二薄膜晶体管的漏极；其中，下基板还包括层叠下共电极与电荷共享片之间的绝缘层，次像素设于绝缘层上并与电荷共享片间隔设置，电荷共享片通过过孔与第三薄膜晶体管电连接并向相邻的次像素端部延伸，并且电荷共享片与相邻的次像素下的下共电极形成电荷共享电容，第三薄膜晶体管的漏极耦接到电荷共享电容，以使得在相邻的次像素与电荷共享电容短时，相邻的两个像素单元显示纯色画面。
其中，电荷共享片中的一半间隔设于次像素端部，电荷共享片中的另一半延伸至相邻的次像素端部。
其中，电荷共享片中的1/5部分间隔设于次像素端部，电荷共享片中的4/5部分延伸至相邻的次像素端部。
其中，下共电极设有延伸部，数据线和第一薄膜电晶体管的源极通过连接线电连接，连接线与延伸部间隔交迭。
其中，延伸部间隔交迭于连接线的上方。
其中，延伸部间隔交迭于连接线的下方。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示装置，其包括上述的液晶显示面板。
与现有技术相比，本发明所提供的液晶显示装置及其液晶显示面板中的次像素设于绝缘层上并与电荷共享片间隔设置，电荷共享片通过过孔与第三薄膜晶体管电连接并向相邻的次像素端部延伸，并且电荷共享片与相邻的次像素下的下共电极形成电荷共享电容，第三薄膜晶体管的漏极耦接到电荷共享电容，以使得在相邻的次像素与电荷共享电容短时，相邻的两个像素单元显示纯色画面，使得检测方法简单且有效，提高良品率。
附图说明
图1a是现有技术液晶显示面板的部分结构的主视图；
图1b是图1a的本发明液晶显示面板的俯视图；
图1c是现有技术液晶显示面板的像素单元的等效电路图；
图2是本发明液晶显示面板的部分结构的主视图；
图3是图2的本发明液晶显示面板的俯视图；
图4是本发明液晶显示面板的像素单元的等效电路图；
图5是本发明液晶显示面板的相邻两个次像素的等效电路图；
图6是本发明液晶显示面板主像素结构的俯视图。
具体实施方式
下面将结合附图和实施方式对本发明进行详细说明。
请一并参阅图2-图5，图2是本发明液晶显示面板的部分结构的主视图，图3是图2的本发明液晶显示面板的俯视图，图4是本发明液晶显示面板的像素单元的等效电路图，图5是本发明液晶显示面板的相邻两个次像素的等效电路图。
本发明的液晶显示面板包括上基板(图未示)、下基板10以及液晶层(图未示)，液晶层设于上基板和下基板之间。
如图4所示，本发明的上基板设有上共电极(图未示)，下基板10与上基板相对设置，下基板10设有数条数据线21、数条充电扫描线22、数个间隔设置的像素单元23、数条电荷共享扫描线24、数条下共电极25。每一像素单元23包含分别设于数条下基板10上的第一薄膜晶体管231、第二薄膜晶体管232、第三薄膜晶体管233、主像素234、与主像素234间隔设置的次像素235以及设于主像素234与次像素235之间的电荷共享片236；第一薄膜晶体管231的栅极耦接到充电扫描线22，第一薄膜晶体管231的源极则耦接至数据线21，第一薄膜晶体管231的漏极耦接到主像素234；第二薄膜晶体管232的栅极耦接到充电扫描线22，第二薄膜晶体管232的源极则耦接至数据线21，第二薄膜晶体管232的漏极耦接到次像素235；第三薄膜晶体管233的栅极耦接到电荷共享扫描线24，第三薄膜晶体管233的源极则耦接至第二薄膜晶体管232的漏极，其中，主像素234与上共电极之间形成第一储存电容(Cst1)241，主像素234与下共电极25之间形成第一液晶电容251(C1c1)，次像素235与上共电极之间形成第二储存电容242(Cst2)，次像素235与下共电极25之间形成第二液晶电容252(C1c2)。
如图2和图3所示，下基板10还包括层叠下共电极25与电荷共享片236之间的绝缘层40，次像素235设于绝缘层40上并与电荷共享片236间隔设置，电荷共享片236通过过孔41与第三薄膜晶体管233电连接并向相邻的次像素235’端部延伸，并且电荷共享片236与相邻的次像素235’下的下共电极25形成电荷共享电容237(Cst3)，第三薄膜晶体管233的漏极耦接到电荷共享电容237(Cst3)，以使得在相邻的次像素235’与电荷共享电容237(Cst3)短路时，相邻的两个像素单元23显示纯色画面，该短路等效电路图如图5，短路线为虚线11。
本发明电荷共享片236中的一半间隔设于次像素235端部，电荷共享片236中的另一半延伸至相邻的次像素235’端部，也可以是电荷共享片236中的1/3部分间隔设于次像素235端部，电荷共享片236中的2/3部分延伸至相邻的次像素235’端部，还可以是电荷共享片236中的1/5部分间隔设于次像素235端部，电荷共享片236中的4/5部分延伸至相邻的次像素235’端部。
图6是本发明液晶显示面板主像素结构的俯视图，在其它实施例中，下共电极25设有延伸部131，数据线21和第一薄膜电晶体管231的源极通过延伸部131电连接，延伸部131与连接线132间隔交迭，延伸部131间隔交迭于数据线21的上方或下方，具体地，延伸部131自下共电极25向第一薄膜电晶体管231的源极延伸，且其末端邻近薄膜电晶体管231的源极，并设于数据线21与第一薄膜电晶体管231的源极的连接线132的上方或下方，且连接线132与延伸部131之间彼此绝缘，使得在暗点化作业时，将数据线21和第一薄膜晶体管231的源极的连接线132段开(图中打×表示在暗点化作业时电路断开)，并用激光将延伸部131与第一薄膜晶体管231的源极的连接线132导通(图中标号16表示采用激光使两条线导通)，使得主像素234的电压与下共电极25的电压相等并进一步与上共电极的电压相等，从而使得对应的液晶分子不发生偏转导光以完成暗点化作业，操作简便，暗点化作业难度低，避免暗点化作业导致的碎亮点问题，提高产品修复率及良率。
本发明还提供一种液晶显示装置，其包括上述的液晶显示面板。
本发明所提供的液晶显示装置及其液晶显示面板中的次像素235设于绝缘层40上并与电荷共享片236间隔设置，电荷共享片236通过过孔41与第三薄膜晶体管233电连接并向相邻的次像素235’端部延伸，并且电荷共享片236与相邻的次像素235’下的下共电极25形成电荷共享电容237，第三薄膜晶体管233的漏极耦接到电荷共享电容237，以使得在相邻的次像素235’与电荷共享电容237短时，相邻的两个像素单元23显示纯色画面，使得检测方法简单且有效，提高良品率。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (7)

1.一种液晶显示面板，其特征在于，包括：
上基板，设有上共电极；
下基板，与所述上基板相对设置，设有数条数据线、数条充电扫描线、数个间隔设置的像素单元、数条电荷共享扫描线、数条下共电极；
液晶层，设于所述上基板和所述下基板之间；
每一像素单元包含分别设于所述数条下基板上的第一薄膜晶体管、第二薄膜晶体管、第三薄膜晶体管、主像素、与主像素间隔设置的次像素以及设于所述主像素与所述次像素之间的电荷共享片；
所述第一薄膜晶体管的栅极耦接到所述充电扫描线，所述第一薄膜晶体管的源极则耦接至所述数据线，所述第一薄膜晶体管的漏极耦接到所述主像素；所述第二薄膜晶体管的栅极耦接到所述充电扫描线，所述第二薄膜晶体管的源极则耦接至所述数据线，所述第二薄膜晶体管的漏极耦接到所述次像素；所述第三薄膜晶体管的栅极耦接到所述电荷共享扫描线，所述第三薄膜晶体管的源极则耦接至所述第二薄膜晶体管的漏极；其中，
所述下基板还包括层叠所述下共电极与所述电荷共享片之间的绝缘层，所述次像素设于所述绝缘层上并与所述电荷共享片间隔设置，所述电荷共享片通过过孔与所述第三薄膜晶体管电连接并向相邻的次像素端部延伸，并且所述电荷共享片与所述相邻的次像素下的下共电极形成电荷共享电容，所述第三薄膜晶体管的漏极耦接到所述电荷共享电容，以使得在所述相邻的次像素与所述电荷共享电容短时，相邻的两个像素单元显示纯色画面。
2.根据权利要求1所述的液晶显示面板，其特征在于，所述电荷共享片中的一半间隔设于所述次像素端部，所述电荷共享片中的另一半延伸至所述相邻的次像素端部。
3.根据权利要求1所述的液晶显示面板，其特征在于，所述电荷共享片中的1/5部分间隔设于所述次像素端部，所述电荷共享片中的4/5部分延伸至所述相邻的次像素端部。
4.根据权利要求1所述的液晶显示面板，其特征在于，所述下共电极设有延伸部，所述数据线和所述第一薄膜电晶体管的源极通过连接线电连接，所述连接线与所述延伸部间隔交迭。
5.根据权利要求4所述的液晶显示面板，其特征在于，所述延伸部间隔交迭于所述连接线的上方。
6.根据权利要求4所述的液晶显示面板，其特征在于，所述延伸部间隔交迭于所述连接线的下方。
7.一种液晶显示装置，其特征在于，包括权利要求1-6任意一项所述的液晶显示面板。
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