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CN105116579B - 液晶显示面板及其驱动方法 - Google Patents

液晶显示面板及其驱动方法 Download PDF

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CN105116579B
CN105116579B CN201510643813.7A CN201510643813A CN105116579B CN 105116579 B CN105116579 B CN 105116579B CN 201510643813 A CN201510643813 A CN 201510643813A CN 105116579 B CN105116579 B CN 105116579B
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electrode
film transistor
liquid crystal
crystal display
display panel
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CN105116579A (zh
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陈政鸿
姜佳丽
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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 PCT/CN2015/092362 priority patent/WO2017054263A1/zh
Priority to US14/890,404 priority patent/US10152929B2/en
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    • 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
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    • 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
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Abstract

本发明公开一种液晶显示面板及其驱动方法。所述液晶显示面板包括存储电极、多条扫描线、多条数据线以及多个像素区域，每一像素区域包括一像素电极、一第一薄膜晶体管及一第二薄膜晶体管，第一薄膜晶体管用于驱动对应的像素电极，第二薄膜晶体管的栅极连接前一条扫描线，第二薄膜晶体管的源级和漏极中的一个连接对应的像素电极，另一个连接存储电极。通过上述方式，本发明能够使得液晶显示面板在显示时被施加最佳的公共电压，确保显示品质。

Description

液晶显示面板及其驱动方法
技术领域
本发明涉及液晶显示技术领域，具体涉及驱动电压技术领域，特别是涉及一种液晶显示面板及其驱动方法。
背景技术
液晶显示面板利用公共电压(V-com)与灰阶电压之间不同的电压差来显示不同的像素灰阶，其中为防止液晶分子被极化，灰阶电压需要反转正负极性以交流方式驱动。假若所施加的公共电压不佳，则会影响液晶显示面板的显示品质，例如显示画面出现残留、闪烁(Flicker)现象。因此，在投入市场前需要检测液晶面板以确保其在显示时能够被施加最佳的公共电压，然而当前业界通常采用的检测人员手动检测或机台自动检测的方式，均会增加生产成本并降低产能。
发明内容
鉴于此，本发明提供一种液晶显示面板及其驱动方法，能够使得液晶显示面板在显示时被施加最佳的公共电压，确保显示品质。
本发明采用的一个技术方案是提供一种液晶显示面板。所述液晶显示面板包括存储电极、多条扫描线、多条数据线以及由多条扫描线和多条数据线定义出的呈阵列排布的多个像素区域，且每一像素区域包括一像素电极、一第一薄膜晶体管以及一第二薄膜晶体管，第一薄膜晶体管用于驱动对应的像素区域的所述像素电极，第二薄膜晶体管的栅极连接前一条扫描线，第二薄膜晶体管的源级和漏极中的一个连接对应的像素区域的像素电极，另一个连接存储电极。
其中，存储电极呈条状设置，且条状的存储电极与数据线平行。
其中，存储电极呈条状设置，且条状的存储电极与扫描线平行。
其中，液晶显示面板还包括外围走线，外围走线实现存储电极与设置于液晶显示面板的彩膜基板上的公共电极之间的连接。
其中，存储电极包括呈条状设置的第一存储电极和第二存储电极，第一存储电极与扫描线平行，第二存储电极与数据线平行，且第一存储电极和第二存储电极之间交叉绝缘。
其中，液晶显示面板还包括外围走线，外围走线实现第一存储电极与设置于液晶显示面板的彩膜基板上的公共电极之间的连接，以及第二存储电极与公共电极之间的连接。
其中，第一存储电极、第二存储电极以及像素电极的数量相等。
其中，第一薄膜晶体管的源极连接对应的数据线，其漏极连接对应的像素电极，且其栅极连接对应的扫描线。
其中，液晶显示面板还包括栅极驱动器和数据驱动器，栅极驱动器与多条扫描线连接并依次为多条扫描线提供栅极驱动信号，以依次启动各条扫描线对应的第一薄膜晶体管和第二薄膜晶体管，数据驱动器与多条数据线连接并向其提供灰阶驱动信号，以使灰阶驱动信号经第一薄膜晶体管施加至像素电极，且在液晶显示面板进行前一帧显示时施加至像素电极的灰阶驱动信号经第二薄膜晶体管施加至存储电极。
本发明采用的另一个技术方案是提供一种对上述液晶显示面板的驱动方法。所述驱动方法包括：多条扫描线依次接收栅极驱动信号，依次启动各条扫描线对应的第一薄膜晶体管和第二薄膜晶体管；多条数据线接收灰阶驱动信号，使得灰阶驱动信号经第一薄膜晶体管施加至像素电极，且在液晶显示面板进行前一帧显示时施加至像素电极的灰阶驱动信号经第二薄膜晶体管施加至存储电极。
本发明实施例的液晶显示面板及其驱动方法，设计每一像素区域包括两个薄膜晶体管，一个将灰阶驱动信号施加至像素电极，另一个存储显示前一帧画面时施加至像素电极的灰阶驱动信号，由于灰阶驱动信号(灰阶电压)需要反转正负极性，因此相邻两帧画面对应的公共电压可以维持平衡，使得公共电压最佳，从而可确保显示品质，并且无需检测人员手动或机台自动检测，可降低生产成本并确保产能。
附图说明
图1是本发明的液晶显示面板一实施例的结构示意图；
图2是本发明的液晶显示面板另一实施例的结构示意图；
图3是本发明的液晶显示面板又一实施例的结构示意图；
图4是本发明的液晶显示面板的驱动方法的流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，本发明以下所描述的实施例仅仅是本发明的一部分实施例，而不是本发明全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明所保护的范围。
图1是本发明的液晶显示面板一实施例的结构示意图。如图1所示，液晶显示面板包括多条平行设置的扫描线G1…Gn-1,Gn,Gn+1,Gn+2、多条平行设置且与扫描线绝缘交叉的数据线D1…Dm-1,Dm,Dm+1,Dm+2以及呈阵列排布的多个像素区域，其中多个像素区域由扫描线G1…Gn-1,Gn,Gn+1,Gn+2和数据线D1…Dm-1,Dm,Dm+1,Dm+2交叉定义，例如扫描线Gn和数据线Dm交叉定义一像素区域Pmn，且像素区域Pmn包括的像素电极对应连接扫描线Gn和数据线Dm，其中m、n均为正整数。
每一像素区域还包括两个薄膜晶体管(Thin Film Transistor，TFT)，即第一薄膜晶体管T1和第二薄膜晶体管T2，其中，第一薄膜晶体管T1用于驱动像素电极进行画面显示，其相当于现有技术的每一像素区域中唯一的薄膜晶体管，第二薄膜晶体管T2为本发明实施例在现有技术的每一像素区域中增加的，例如，像素区域Pmn的第一薄膜晶体管T1的栅极g1连接扫描线Gn、源极s1连接数据线Dm、漏极d1连接像素电极，第二薄膜晶体管T2的栅极g2连接前一条扫描线Gn-1、源级s2连接像素区域Pmn的像素电极、漏极d2连接液晶显示面板的存储电极C，当然，还可以设置第二薄膜晶体管T2的漏极d2连接像素区域Pmn的像素电极，而其源级s2连接液晶显示面板的存储电极C。
其中，存储电极C设置于液晶显示面板的阵列基板上且与像素电极绝缘间隔设置，从而与像素电极构成电容，用于短暂存储显示前一帧画面时的灰阶电压。本实施例的存储电极C呈条状设置，条状的多个存储电极C与数据线平行且一一对应设置，即像素区域Pmn的第二薄膜晶体管T2的漏极d2连接的存储电极C与数据线Dm对应，并且条状的存储电极C之间通过外围走线L1相连接。
在显示画面的过程中，扫描线G1…Gn-1,Gn,Gn+1,Gn+2连接液晶显示面板的栅极驱动器并接收栅极驱动器依次为多条扫描线提供栅极驱动信号，从而依次启动各条扫描线对应的第一薄膜晶体管T1和第二薄膜晶体管T2，数据线D1…Dm-1,Dm,Dm+1,Dm+2连接液晶显示面板的数据驱动器并接收数据驱动器提供的灰阶驱动信号。
当扫描线Gn-1接收到栅极驱动信号(呈高电平)时，像素区域Pmn的第二薄膜晶体管T2启动，从而将像素区域Pmn对应的电容所存储的显示上一帧画面时的灰阶电压传递至存储电极C，同理，扫描线Gn接收到栅极驱动信号时，灰阶电压经像素区域Pmn的第二薄膜晶体管T2传递至存储电极C，由于灰阶电压为反转正负极性的交流方式驱动，因此与扫描线Gn对应连接的像素电极与存储电极C构成的多个电容所存储的灰阶电压有正极性也有负极性，其中多个电容所存储的灰阶电压构成液晶显示面板显示时的公共电压，使得公共电压维持正负平衡(即最佳)，从而可确保显示品质。相比较于现有技术，由于无需检测人员手动或机台自动检测，因此可降低生产成本并确保产能。
对于采用VA(Vertical Alignment，多象限垂直配向型)纵向电场模式的液晶显示面板，显示时需要施加垂直方向的电场，即彩膜基板上的公共电压与阵列基板上的灰阶电压之间的电压差所形成的电场，因此需要将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极，具体可利用外围走线连接外围走线L1，从而实现存储电极C与彩膜基板上的公共电极之间的连接。
而对于采用FFS(Fringe Field Switching，边缘电场切换型)等IPS(In-planeswitching，平面转换型)横向电场模式的液晶显示面板，由于显示时需要施加的是水平方向的电场，因此只需利用多个电容所存储的灰阶电压(作为公共电压)与像素电极接收的灰阶电压之间的电压差所形成的电场即可，无需将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极。
图2是本发明的液晶显示面板另一实施例的结构示意图。为了简化说明并比较各实施例，本实施例与前述实施例中使用相同符号标注相同组件，并仅针对不同之处进行说明。如图2所示，不同于上述实施例的是，呈条状设置的存储电极C与对应的数据线D1…Dm-1,Dm,Dm+1,Dm+2平行。本实施例的液晶显示面板的工作原理与前述实施例相同，此处不再赘述。并且对于采用VA模式的液晶显示面板，需要利用外围走线连接外围走线L2，从而将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极，而对于采用IPS模式的液晶显示面板，则无需将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极。
图3是本发明的液晶显示面板又一实施例的结构示意图。为了简化说明并比较各实施例，本实施例与前述实施例中使用相同符号标注相同组件，并仅针对不同之处进行说明。如图3所示，不同于前述实施例的是，存储电极C包括呈条状设置的第一存储电极C1和第二存储电极C2，第一存储电极C1与扫描线G1…Gn-1,Gn,Gn+1,Gn+2平行，第二存储电极C2与数据线D1…Dm-1,Dm,Dm+1,Dm+2平行，且第一存储电极C1和第二存储电极C2之间交叉绝缘。本实施例的液晶显示面板的工作原理与前述实施例相同，此处不再赘述。并且对于采用VA模式的液晶显示面板，需要利用一外围走线连接外围走线L1，从而将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极，且利用另一外围走线连接外围走线L1，从而也将多个电容所存储的灰阶电压也传递至彩膜基板上的公共电极，外围走线L1和外围走线L2之间绝缘，且用于两者的两外围走线之间也绝缘。而对于采用IPS模式的液晶显示面板，则无需利用外围走线L1、L2将多个电容所存储的灰阶电压传递至彩膜基板上的公共电极。
图4是本发明的液晶显示面板的驱动方法的流程示意图，用于对前述实施例的液晶显示面板进行驱动，以进行画面显示。如图4所示，本实施例的驱动方法包括：
步骤S41：多条扫描线依次接收栅极驱动信号，依次启动各条扫描线对应的第一薄膜晶体管和第二薄膜晶体管。
步骤S42：多条数据线接收灰阶驱动信号，使得灰阶驱动信号经第一薄膜晶体管施加至像素电极，且在液晶显示面板进行前一帧显示时施加至像素电极的灰阶驱动信号经第二薄膜晶体管施加至存储电极。
其中，第一薄膜晶体管和第二薄膜晶体管如何进行灰阶信号的传递、存储电极如何对施加至其上的灰阶驱动信号进行处理，可参见前述实施例的描述，此处不再赘述。
综上所述，本发明实施例的液晶显示面板及其驱动方法，设计每一像素区域包括两个薄膜晶体管，一个将灰阶驱动信号施加至像素电极，另一个存储显示前一帧画面时施加至像素电极的灰阶驱动信号，由于灰阶驱动信号(灰阶电压)需要反转正负极性，因此相邻两帧画面对应的公共电压可以维持平衡，使得公共电压最佳，从而可确保显示品质，并且无需检测人员手动或机台自动检测，可降低生产成本并确保产能。
再次说明，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 (9)

1.一种液晶显示面板，包括存储电极、多条扫描线、多条数据线以及由所述多条扫描线和所述多条数据线定义出的呈阵列排布的多个像素区域，其特征在于，每一所述像素区域包括一像素电极、一第一薄膜晶体管以及一第二薄膜晶体管，所述第一薄膜晶体管用于驱动对应的所述像素区域的所述像素电极，所述第二薄膜晶体管的栅极连接前一条所述扫描线，所述第二薄膜晶体管的源级连接对应的所述像素区域的所述像素电极，所述第二薄膜晶体管的漏极连接所述存储电极，
其中，所述液晶显示面板还包括外围走线，所述外围走线实现所述存储电极与设置于所述液晶显示面板的彩膜基板上的公共电极之间的连接；
其中，所述存储电极与所述像素电极绝缘间隔设置，从而与所述像素电极构成电容，用于短暂存储显示前一帧画面时的灰阶电压。
2.根据权利要求1所述的液晶显示面板，其特征在于，所述存储电极呈条状设置，且所述条状的存储电极与所述数据线平行。
3.根据权利要求1所述的液晶显示面板，其特征在于，所述存储电极呈条状设置，且所述条状的存储电极与所述扫描线平行。
4.根据权利要求1所述的液晶显示面板，其特征在于，所述存储电极包括呈条状设置的第一存储电极和第二存储电极，所述第一存储电极与所述扫描线平行，所述第二存储电极与所述数据线平行，且所述第一存储电极和所述第二存储电极之间交叉绝缘。
5.根据权利要求4所述的液晶显示面板，其特征在于，所述液晶显示面板还包括外围走线，所述外围走线实现所述第一存储电极与设置于所述液晶显示面板的彩膜基板上的公共电极之间的连接，以及所述第二存储电极与所述公共电极之间的连接。
6.根据权利要求4所述的液晶显示面板，其特征在于，所述第一存储电极、所述第二存储电极以及所述像素电极的数量相等。
7.根据权利要求1所述的液晶显示面板，其特征在于，所述第一薄膜晶体管的源极连接对应的所述数据线，所述第一薄膜晶体管的漏极连接对应的所述像素电极，所述第一薄膜晶体管的栅极连接对应的所述扫描线。
8.根据权利要求7所述的液晶显示面板，其特征在于，所述液晶显示面板还包括栅极驱动器和数据驱动器，所述多条扫描线连接所述栅极驱动器，所述多条数据线连接所述数据驱动器，所述栅极驱动器依次为所述多条扫描线提供栅极驱动信号，以依次启动各条所述扫描线对应的所述第一薄膜晶体管和所述第二薄膜晶体管，所述数据驱动器向所述多条数据线提供灰阶驱动信号，以使所述灰阶驱动信号经所述第一薄膜晶体管施加至所述像素电极，且在所述液晶显示面板进行前一帧显示时施加至所述像素电极的所述灰阶驱动信号经所述第二薄膜晶体管施加至所述存储电极。
9.一种液晶显示面板的驱动方法，所述液晶显示面板包括存储电极、多条扫描线、多条数据线以及由所述多条扫描线和所述多条数据线定义出的呈阵列排布的多个像素区域，其特征在于，每一所述像素区域包括一像素电极、一第一薄膜晶体管以及一第二薄膜晶体管，所述第一薄膜晶体管用于驱动对应的所述像素区域的所述像素电极，所述第二薄膜晶体管的栅极连接前一条所述扫描线，所述第二薄膜晶体管的源级连接对应的所述像素区域的所述像素电极，所述第二薄膜晶体管的漏极连接所述存储电极，
其中，所述液晶显示面板还包括外围走线，所述外围走线实现所述存储电极与设置于所述液晶显示面板的彩膜基板上的公共电极之间的连接；
其中，所述存储电极与所述像素电极绝缘间隔设置，从而与所述像素电极构成电容，用于短暂存储显示前一帧画面时的灰阶电压；
所述驱动方法包括：所述多条扫描线依次接收栅极驱动信号，依次启动各条所述扫描线对应的所述第一薄膜晶体管和所述第二薄膜晶体管；
所述多条数据线接收灰阶驱动信号，使得所述灰阶驱动信号经所述第一薄膜晶体管施加至所述像素电极，且在所述液晶显示面板进行前一帧显示时施加至所述像素电极的所述灰阶驱动信号经所述第二薄膜晶体管施加至所述存储电极。
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