CN108803188A - 一种像素结构、其驱动方法、电子纸及显示装置 - Google Patents
一种像素结构、其驱动方法、电子纸及显示装置 Download PDFInfo
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Abstract
本发明公开了一种像素结构、其驱动方法、电子纸及显示装置,增加了与各像素电极对应电连接的补偿电极,且补偿电极在衬底基板的正投影与栅线在衬底基板的正投影存在交叠区域,即相当于用补偿电极增加像素电极的面积,从而可以提高开口率。并且,由于与第n行的像素电极对应的补偿电极与对应的第一开关晶体管的第二极连接,该第一开关晶体管的栅极和第一极与第n‑1条栅线连接,这样,当第n‑1条栅线扫描时,由于与其有正对面积的补偿电极与该栅线是导通的,因此增加的补偿电极虽与其存在正对面积,但是电压相同,因此栅线与补偿电极之间不产生耦合电容,从而避免了栅线扫描时由于补偿电极覆盖栅线导致的负载变大的问题。
Description
技术领域
本发明涉及显示技术领域,尤指一种像素结构、其驱动方法、电子纸及显示装置。
背景技术
随着数字技术的发展,越来越多传播信息的显示设备走入人们的生活,例如液晶显示器,已广泛地应用于通讯、信息及消费性的电子产品上,然而,液晶显示器在显示过程中需要持续供电,这使得在断电情况下也能长时间保持显示的电子纸(Electronic Paper,EP)显示了明显的优势,此外,电子纸在使用过程中比液晶显示器省电。
电子纸显示的原理为电泳,借助像素电极和公共电极形成的电场驱动带电粒子上下运动,不同颜色的带电粒子反射环境光实现黑白/黑白红/彩色等多种显示方案。
目前,电子纸的像素结构如图1所示,像素电极011位于数据线data和栅线gate限定的区域内,像素电极011通过连接薄膜晶体管TFT,直接驱动带电粒子。为了确保像素显示效果,像素电极011与栅线gate和数据线data会保持一定距离,一方面避免电容耦合效应扰乱像素电压,造成显示异常;另一方面,降低栅线gate和数据线data负载,确保像素充电。这样虽然满足了显示效果,但是降低了开口率。
发明内容
本发明实施例提供一种像素结构、其驱动方法、电子纸及显示装置,用以解决现有技术中存在的像素开口率低的问题。
本发明实施例提供的一种电子纸的像素结构,包括衬底基板、位于所述衬底基板上的N行像素电极、以及与各行所述像素电极一一对应连接的N条栅线,且各所述栅线位于对应行的像素电极的上侧或下侧;还包括:与各所述像素电极对应连接的补偿电极,以及与各所述补偿电极一一对应设置的第一开关晶体管;其中,
对于与第n行像素电极对应的所述补偿电极,所述补偿电极设置于第n-1行像素电极靠近第n-1条栅线的一侧,且所述补偿电极在所述衬底基板的正投影与所述第n-1条栅线在所述衬底基板的正投影存在交叠区域;n为大于1且小于或等于N的任一整数;
与第n行的所述像素电极对应的所述补偿电极与对应的所述第一开关晶体管的第二极连接,所述第一开关晶体管的栅极和第一极与第n-1条栅线连接。
可选地,在本发明实施例提供的像素结构中,所述补偿电极与所述像素电极设置为同层同材质。
可选地,在本发明实施例提供的像素结构中,所述补偿电极与对应的所述像素电极为一体结构。
可选地,在本发明实施例提供的像素结构中,还包括:与各所述补偿电极一一对应的的第二开关晶体管;
所述补偿电极通过对应的所述第二开关晶体管与对应的像素电极连接;其中,
与第n行的所述像素电极对应的所述补偿电极与对应的所述第二开关晶体管的第二极连接,所述第二开关晶体管的第一极与第n行的所述像素电极电连接,所述第二开关晶体管的栅极与第n条栅线连接。
可选地,在本发明实施例提供的像素结构中,所述第一开关晶体管和所述第二开关晶体管中具有相同功能的膜层为同层设置。
可选地,在本发明实施例提供的像素结构中,所述补偿电极在列方向上的宽度完全覆盖所述栅线在列方向的宽度。
可选地,在本发明实施例提供的像素结构中,还包括:与各所述像素电极一一对应的第三开关晶体管;以及与各列所述像素电极对应的数据线;
第n行的所述像素电极与对应的所述第三开关晶体管的第二极连接,所述第三开关晶体管的栅极与第n行栅线连接,所述第三开关晶体管的第二极与对应的数据线连接。
相应地,本发明实施例还提供了一种电子纸,包括本发明实施例提供的上述任一种像素结构。
相应地,本发明实施例还提供了一种显示装置,包括本发明实施例提供的上述电子纸。
相应地,本发明实施例还提供了一种上述像素结构的驱动方法,包括:
依次向各行所述栅线提供扫描信号;其中,
在向第n行栅线提供扫描信号时,第n行像素电极与其对应的所述补偿电极导通,与第n+1行像素电极对应的所述补偿电极与所述第n行栅线导通;n为大于1且小于或等于N的任一整数。
本发明有益效果如下:
本发明实施例提供的像素结构、其驱动方法、电子纸及显示装置,增加了与各像素电极对应电连接的补偿电极,且补偿电极在衬底基板的正投影与栅线在衬底基板的正投影存在交叠区域,即相当于用补偿电极增加像素电极的面积,从而可以提高开口率。并且,由于与第n行的像素电极对应的补偿电极与对应的第一开关晶体管的第二极连接,该第一开关晶体管的栅极和第一极与第n-1条栅线连接,这样,当第n-1条栅线扫描时,由于与其有正对面积的补偿电极与该栅线是导通的,因此增加的补偿电极虽与其存在正对面积,但是电压相同,因此栅线与补偿电极之间不产生耦合电容,从而避免了栅线扫描时由于补偿电极覆盖栅线导致的负载变大的问题。
附图说明
图1为现有的电子纸的像素结构的示意图;
图2为本发明一种实施例提供的像素结构的示意图;
图3为本发明另一种实施例提供的像素结构的示意图;
图4为本发明又一种实施例提供的像素结构的示意图;
图5为本发明又一种实施例提供的像素结构的示意图;
图6为图2和图3所示的像素结构对应的驱动方法的时序示意图;
图7为图4和图5所示的像素结构对应的驱动方法的时序示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
附图中各部件的形状和大小不反映真实比例,目的只是示意说明本发明内容。
本发明实施例提供的一种电子纸的像素结构,如图2至图5所示,包括衬底基板01、位于衬底基板01上的N行像素电极011、以及与各行像素电极011一一对应连接的N条栅线gaten;如图2和图3所示,各栅线gaten位于对应行的像素电极011的下侧,或者如图4和图5所示,各栅线gaten位于对应行的像素电极011的上侧;
像素结构中还包括:与各像素电极011对应连接的补偿电极012,以及与各补偿电极012一一对应设置的第一开关晶体管T1;其中,
对于与第n行像素电极011对应的补偿电极012,补偿电极012设置于第n-1行像素电极011靠近第n-1条栅线gaten-1的一侧,且与第n行像素电极011对应的补偿电极012在衬底基板01的正投影与第n-1条栅线gaten-1在衬底基板01的正投影存在交叠区域;n为大于1且小于或等于N的任一整数;
与第n行的像素电极011对应的补偿电极012与对应的第一开关晶体管T1的第二极连接,该第一开关晶体管T1的栅极和第一极与第n-1条栅线gaten-1连接。
本发明实施例提供的像素结构,增加了与各像素电极对应电连接的补偿电极,且补偿电极在衬底基板的正投影与栅线在衬底基板的正投影存在交叠区域,即相当于用补偿电极增加像素电极的面积,从而可以提高开口率。并且,由于与第n行的像素电极对应的补偿电极与对应的第一开关晶体管的第二极连接,该第一开关晶体管的栅极和第一极与第n-1条栅线连接,这样,当第n-1条栅线扫描时,由于与其有正对面积的补偿电极与该栅线是导通的,因此增加的补偿电极虽与其存在正对面积,但是电压相同,因此栅线与补偿电极之间不产生耦合电容,从而避免了栅线扫描时由于补偿电极覆盖栅线导致的负载变大的问题。
需要说明的是,在本发明实施例提供的像素结构中,如图2和图3所示,当第n行栅线gaten位于第n行像素电极011的下侧时,第1条栅线指向第N条栅线的方向为由衬底基板01顶端指向底端的方向;如图4和图5所示,当第n行栅线gaten位于第n行像素电极011的上侧时,第1条栅线指向第N条栅线的方向为由衬底基板01底端指向顶端的方向。
可选地,在本发明实施例提供的像素结构中,如图2至图5所示,补偿电极012与像素电极011设置为同层同材质。这样,通过一次构图工艺即可同时形成补偿电极012和像素电极011,即在形成像素电极011时,仅需要改变构图图案就可以形成像素电极011和补偿电极012的图形,在现有工艺基础上,不用增加Mask工艺次数,从而降低工艺成本,节约工艺时间。
可选地,在本发明实施例提供的像素结构中,如图2和图4所示,补偿电极012与对应的像素电极011为一体结构。这样当第n-1条栅线扫描时,第n-1条栅线上方的补偿电极012与第n-1条栅线通过导通的第一开关晶体管导通,从而补偿电极012与第n-1条栅线不形成电容。当第n条栅线扫描时,像素电极011和补偿电极011同时充电,从而增大电子纸的存储电容,并且像素开口率增大。
在具体实施时,由于补偿电极012与对应的像素电极011为一体结构,当第n-1条栅线扫描时,第n行像素电极011会与电子纸上的公共电极产生耦合电容,因此适用于小尺寸产品等栅线负载要求不高的产品。
可选地,在本发明实施例提供的像素结构中,如图3和图5所示,还包括:与各补偿电极012一一对应的的第二开关晶体管T2;
补偿电极012通过对应的第二开关晶体管T2与对应的像素电极011连接。
进一步地,在本发明实施例提供的像素结构中,如图3所示,与第n行的像素电极011对应的补偿电极012与对应的第二开关晶体管T2的第二极连接,第二开关晶体管T2的第一极与第n行的像素电极011电连接,第二开关晶体管的栅极与第n条栅线gaten连接。这样当第n-1条栅线扫描时,第n-1条栅线上方的补偿电极012与第n-1条栅线通过导通的第一开关晶体管导通,从而补偿电极012与第n-1条栅线不形成电容。并且补偿电极012与第n行像素电极通过第二开关晶体管T2断开,从而第n行像素电极对第n-1条栅线不会造成影响。当第n条栅线扫描时,像素电极011和补偿电极011同时充电,从而增大电子纸的存储电容,并且像素开口率增大。
可选地,在本发明实施例提供的像素结构中,第一开关晶体管和第二开关晶体管中具有相同功能的膜层为同层设置,从而减少构图工艺步骤。
可选地,在本发明实施例提供的像素结构中,第一开关晶体管和第二开关晶体管位于像素电极和/或补偿电极的下方。这样可以尽可能的增大像素开口率。
可选地,在本发明实施例提供的像素结构中,如图2至图5所示,补偿电极012在列方向上的宽度完全覆盖栅线gate在列方向的宽度。即沿栅线gate的宽度方向,补偿电极012是覆盖栅线的。这样可以尽可能增加补偿电极012的面积,从而增大像素的开口率。
可选地,在本发明实施例提供的像素结构中,如图2至图5所示,还包括:与各像素电极011一一对应的第三开关晶体管T3;以及与各列像素电极011对应的数据线data;
第n行的像素电极011与对应的第三开关晶体管T3的第二极连接,第三开关晶体管T3的栅极与第n行栅线gaten连接,第三开关晶体管T3的第二极与对应的数据线data连接。这样,当第n行栅线gaten扫描时,对应行的第三开关晶体管T3导通,数据线data对第n行的像素电极011进行充电。
基于同一发明构思,本发明实施例还提供了一种上述像素结构的驱动方法,如图6或图7所示,包括:
依次向各行栅线gaten提供扫描信号;其中,
在向第n行栅线提供扫描信号时,第n行像素电极与其对应的补偿电极导通,与第n+1行像素电极对应的补偿电极与第n行栅线导通;n为大于1且小于或等于N的任一整数。
本发明实施例提供的驱动方法,当第n条栅线扫描时,第n条栅线上方的补偿电极(即与第n+1行像素电极对应的补偿电极)与第n条栅线通过导通的第一开关晶体管导通,从而补偿电极与第n条栅线不形成电容。但是第n行像素电极和与其对应的补偿电极(即第n-1条栅线上方的补偿电极)同时充电,从而增大电子纸的存储电容,并且像素开口率增大。
基于同一发明构思,本发明实施例还提供了一种电子纸,包括本发明实施例提供的上述任一种像素结构。由于该电子纸解决问题的原理与前述一种像素结构相似,因此该电子纸的实施可以参见前述像素结构的实施,重复之处不再赘述。
在具体实施时,本发明实施例提供的电子纸可以是黑白电子纸,也可以是彩色电子纸,在此不作限定。
基于同一发明构思,本发明实施例还提供了一种显示装置,包括本发明实施例提供的上述电子纸。包括本发明实施例提供的上述任一种彩色电子纸。该显示装置可以为:电子书、数码相框、导航仪、电子广告牌等任何具有显示功能的产品或部件。该显示装置的实施可以参见上述彩色电子纸的实施例,重复之处不再赘述。
本发明实施例提供的上述像素结构、其驱动方法、电子纸及显示装置,增加了与各像素电极对应电连接的补偿电极,且补偿电极在衬底基板的正投影与栅线在衬底基板的正投影存在交叠区域,即相当于用补偿电极增加像素电极的面积,从而可以提高开口率。并且,由于与第n行的像素电极对应的补偿电极与对应的第一开关晶体管的第二极连接,该第一开关晶体管的栅极和第一极与第n-1条栅线连接,这样,当第n-1条栅线扫描时,由于与其有正对面积的补偿电极与该栅线是导通的,因此增加的补偿电极虽与其存在正对面积,但是电压相同,因此栅线与补偿电极之间不产生耦合电容,从而避免了栅线扫描时由于补偿电极覆盖栅线导致的负载变大的问题。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。
Claims (10)
1.一种电子纸的像素结构,包括衬底基板、位于所述衬底基板上的N行像素电极、以及与各行所述像素电极一一对应连接的N条栅线,且各所述栅线位于对应行的像素电极的的上侧或者下侧;其特征在于,还包括:与各所述像素电极对应连接的补偿电极,以及与各所述补偿电极一一对应设置的第一开关晶体管;其中,
对于与第n行像素电极对应的所述补偿电极,所述补偿电极设置于第n-1行像素电极靠近第n-1条栅线的一侧,且所述补偿电极在所述衬底基板的正投影与所述第n-1条栅线在所述衬底基板的正投影存在交叠区域;n为大于1且小于或等于N的任一整数;
与第n行的所述像素电极对应的所述补偿电极与对应的所述第一开关晶体管的第二极连接,所述第一开关晶体管的栅极和第一极与第n-1条栅线连接。
2.如权利要求1所述的像素结构,其特征在于,所述补偿电极与所述像素电极设置为同层同材质。
3.如权利要求2所述的像素结构,其特征在于,所述补偿电极与对应的所述像素电极为一体结构。
4.如权利要求2所述的像素结构,其特征在于,还包括:与各所述补偿电极一一对应的的第二开关晶体管;
所述补偿电极通过对应的所述第二开关晶体管与对应的像素电极连接;其中,
与第n行的所述像素电极对应的所述补偿电极与对应的所述第二开关晶体管的第二极连接,所述第二开关晶体管的第一极与第n行的所述像素电极电连接,所述第二开关晶体管的栅极与第n条栅线连接。
5.如权利要求4所述的像素结构,其特征在于,所述第一开关晶体管和所述第二开关晶体管中具有相同功能的膜层为同层设置。
6.如权利要求1所述的像素结构,其特征在于,所述补偿电极在列方向上的宽度完全覆盖所述栅线在列方向的宽度。
7.如权利要求1-6任一项所述的像素结构,其特征在于,还包括:与各所述像素电极一一对应的第三开关晶体管;以及与各列所述像素电极对应的数据线;
第n行的所述像素电极与对应的所述第三开关晶体管的第二极连接,所述第三开关晶体管的栅极与第n行栅线连接,所述第三开关晶体管的第二极与对应的数据线连接。
8.一种电子纸,其特征在于,包括如权利要求1-7任一项所述的像素结构。
9.一种显示装置,其特征在于,包括如权利要求8所述的电子纸。
10.如权利要求1-7任一项所述的像素结构的驱动方法,其特征在于,包括:
依次向各行所述栅线提供扫描信号;其中,
在向第n行栅线提供扫描信号时,第n行像素电极与其对应的所述补偿电极导通,与第n+1行像素电极对应的所述补偿电极与所述第n行栅线导通;n为大于1且小于或等于N的任一整数。
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