CN106502019B - 阵列基板、显示装置及其驱动方法 - Google Patents

阵列基板、显示装置及其驱动方法 Download PDF

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CN106502019B
CN106502019B CN201710001331.0A CN201710001331A CN106502019B CN 106502019 B CN106502019 B CN 106502019B CN 201710001331 A CN201710001331 A CN 201710001331A CN 106502019 B CN106502019 B CN 106502019B
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郑喆奎
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BOE Technology Group Co Ltd
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Abstract

本发明提供了一种阵列基板、显示装置及其驱动方法，属于显示技术领域。其中，阵列基板，包括形成在衬底基板上成行排布的栅线、成列排布的数据线和由栅线和数据线限定出的多个成矩阵排布的子像素，多个子像素包括第一单色子像素、第二单色子像素、第三单色子像素和白色子像素，第一单色子像素、第二单色子像素和第三单色子像素发出的单色光能够混合成白光，其中，单色子像素由偶数行栅线驱动，白色子像素由奇数行栅线驱动；或单色子像素由奇数行栅线驱动，白色子像素由偶数行栅线驱动。通过本发明的技术方案，能够提高子像素的充电时间，进而改善显示装置的显示效果。

Description

阵列基板、显示装置及其驱动方法
技术领域
本发明涉及显示技术领域，特别是指一种阵列基板、显示装置及其驱动方法。
背景技术
一般，分时依次驱动方式(FSC，Field Sequential Color)薄膜晶体管液晶显示装置包括：液晶显示面板，具备互相交叉的多个栅线和多个数据线，在数据线和栅线的交叉部位排列薄膜晶体管而驱动液晶；源极驱动IC(电路)，产生用于对液晶显示面板的数据线进行驱动的扫描驱动信号；栅极驱动IC，产生用于对液晶显示面板的栅线进行驱动的信号；定时控制器，产生用于驱动所述栅极驱动IC的扫描驱动信号，以及用于驱动源极驱动IC的载入信号以及数据信号。
而且为了体现RGB颜色，背光源包含多个红色LED、绿色LED、蓝色LED，而且包含用于存储并读取各帧数据的存储器。源极驱动IC和栅极驱动IC从定时控制器接收进位信号和进位移位方向切换信号，并向左右(上下)传送进位。这样，分时依次驱动方式的液晶显示装置中，一帧数据由R子帧、G子帧和B子帧构成，各帧具有主帧的1/3时间，导致子像素的充电时间不足，影响显示装置的显示效果；并且因RGB子像素的顺次驱动，要求最少3倍以上的液晶反应速度，而由于目前液晶迟缓的反应速度，还会产生混色的问题和色分解(ColorBreak Up)的问题。
发明内容
本发明要解决的技术问题是提供一种阵列基板及显示装置，能够提高子像素的充电时间，进而改善显示装置的显示效果。
为解决上述技术问题，本发明的实施例提供技术方案如下：
一方面，提供一种阵列基板，包括形成在衬底基板上成行排布的栅线、成列排布的数据线和由栅线和数据线限定出的多个成矩阵排布的子像素，多个子像素包括第一单色子像素、第二单色子像素、第三单色子像素和白色子像素，第一单色子像素、第二单色子像素和第三单色子像素发出的单色光能够混合成白光，其中，单色子像素由偶数行栅线驱动，白色子像素由奇数行栅线驱动；或单色子像素由奇数行栅线驱动，白色子像素由偶数行栅线驱动。
进一步地，每行子像素和每列子像素中，单色子像素和白色子像素均交替排布；
其中，奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素；或奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素。
进一步地，在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n-1行的白色子像素和第2n行的白色子像素均由第2n行栅线驱动，第2n+1行的单色子像素和第2n行的单色子像素均由第2n+1行栅线驱动，n为大于1的整数；
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n-1行的白色子像素由第2n-1行栅线驱动，第2n行的白色子像素由第2n+1行栅线驱动，第2n-1行的单色子像素和第2n行的单色子像素均由第2n行栅线驱动，n为大于1的整数。
进一步地，在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n行和第2n+1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素；
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n行和第2n-1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素。
进一步地，在列方向上距离最近的单色子像素的颜色不同。
进一步地，所述第一单色子像素、第二单色子像素和第三单色子像素选自红色子像素、绿色子像素和蓝色子像素中的任一个；或
所述第一单色子像素、第二单色子像素和第三单色子像素选自品红色子像素、青色子像素和黄色子像素中的任一个。
本发明实施例还提供了一种显示装置，包括上述的阵列基板。
进一步地，所述显示装置还包括第一栅极驱动电路和第二栅极驱动电路，第一栅极驱动电路用于驱动单色子像素进行显示，第二栅极驱动电路用于驱动白色子像素进行显示。
进一步地，所述第一栅极驱动电路与奇数行栅线连接，所述第二栅极驱动电路与偶数行栅线连接；或
所述第一栅极驱动电路与偶数行栅线连接，所述第二栅极驱动电路与奇数行栅线连接。
进一步地，所述第一栅极驱动电路和所述第二栅极驱动电路分列所述阵列基板的显示区域的两侧。
进一步地，所述显示装置还包括与所有数据线均连接的源极驱动电路。
本发明实施例还提供了一种上述显示装置的驱动方法，在进行显示时，控制第一栅极驱动电路向对应栅线输入信号，驱动单色子像素进行显示；控制第二栅极驱动电路向对应栅线输入信号，驱动白色子像素进行显示。
本发明的实施例具有以下有益效果：
上述方案中，在像素结构中添加了白色子像素，能够增加显示装置的透过率和对比度，并且在显示装置进行显示时，白色子像素与现有的单色子像素以不同的栅线进行驱动，即白色子像素与单色子像素分别进行驱动，进而能够增加子像素的充电时间，改善显示装置的显示效果。另外，白色子像素与单色子像素是分别进行驱动，因此，对液晶反应速度的要求降低，解决了产生混色的问题和色分解的问题，能够进一步改善显示装置的显示效果。并且由于白色子像素与单色子像素是分别进行驱动，因此，可以将子像素的面积设计的比较大，也能够保证显示装置的像素密度，如果将子像素的面积设计的较大，还可以减少数据线的数量，进而减少源极驱动电路占用的面积，提高显示装置的开口率。
附图说明
图1为现有显示装置的结构示意图；
图2为现有显示装置的数据输出示意图；
图3为现有显示装置的平面示意图；
图4为本发明实施例显示装置的平面示意图；
图5为本发明实施例显示装置的数据输出示意图；
图6为本发明实施例显示装置的驱动电路的示意图。
具体实施方式
为使本发明的实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
如图1所示，现有的显示装置包括：液晶显示面板100，具备互相交叉的多个栅线和多个数据线，在数据线和栅线的交叉部位排列薄膜晶体管而驱动液晶；源极驱动IC200，产生用于对液晶显示面板100的数据线进行驱动的扫描驱动信号；栅极驱动IC300，产生用于对液晶显示面板100的栅线进行驱动的信号；定时控制器500，产生用于驱动所述栅极驱动IC300的扫描驱动信号，以及用于驱动源极驱动IC200的载入信号以及数据信号；背光源400。
而且为了体现RGB颜色，背光源400包含多个红色LED401、绿色LED402、蓝色LED403，而且包含用于存储并读取各帧数据的存储器600。
源极驱动IC200和栅极驱动300从定时控制器500接收进位信号和进位移位方向切换信号，并向左右(上下)传送进位。这样，分时依次驱动方式的液晶显示装置中，一帧数据由R子帧、G子帧和B子帧构成，各帧具有主帧的1/3时间。
主帧由三个子帧R子帧、G子帧和B子帧构成，各子帧由载入时间、等待时间和闪亮时间构成，在各子帧将对应色LED闪亮。由于一帧数据由R子帧、G子帧和B子帧构成，所以各子帧实际必须在1/3帧时间内执行，导致子像素的充电时间不足，影响显示装置的显示效果。如图2所示，在显示装置的刷新频率为60Hz时，对于每一子帧来说，需要在5.56ms的时间内完成从第一行栅线到最后一行栅线的扫描驱动信号的输出。并且因RGB子像素的顺次驱动，要求最少3倍以上的液晶反应速度，而由于目前液晶迟缓的反应速度，还会产生混色的问题和色分解的问题。而且，显示装置会受到环境的影响，尤其是存在低温中液晶的迟缓的反应速度的问题。
为了解决上述问题，本发明实施例提供一种阵列基板及显示装置，能够提高子像素的充电时间，进而改善显示装置的显示效果。
实施例一
本实施例提供一种阵列基板，包括形成在衬底基板上成行排布的栅线、成列排布的数据线和由栅线和数据线限定出的多个成矩阵排布的子像素，多个子像素包括第一单色子像素、第二单色子像素、第三单色子像素和白色子像素，第一单色子像素、第二单色子像素和第三单色子像素发出的单色光能够混合成白光，其中，单色子像素由偶数行栅线驱动，白色子像素由奇数行栅线驱动；或单色子像素由奇数行栅线驱动，白色子像素由偶数行栅线驱动。
本实施例中，在像素结构中添加了白色子像素，能够增加显示装置的透过率和对比度，并且在显示装置进行显示时，白色子像素与现有的单色子像素以不同的栅线进行驱动，即白色子像素与单色子像素分别进行驱动，进而能够增加子像素的充电时间，改善显示装置的显示效果。另外，白色子像素与单色子像素是分别进行驱动，因此，对液晶反应速度的要求降低，解决了产生混色的问题和色分解的问题，能够进一步改善显示装置的显示效果。并且由于白色子像素与单色子像素是分别进行驱动，因此，可以将子像素的面积设计的比较大，也能够保证显示装置的像素密度，如果将子像素的面积设计的较大，还可以减少数据线的数量，进而减少源极驱动电路占用的面积，提高显示装置的开口率。
一具体实施例中的像素结构为：每行子像素和每列子像素中，单色子像素和白色子像素均交替排布；
其中，奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素；或奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素。
如图3所示，现有技术中，第n行的单色子像素由第n行栅线进行驱动，与现有技术不同，本实施例中，在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n-1行的白色子像素和第2n行的白色子像素均由第2n行栅线驱动，第2n+1行的单色子像素和第2n行的单色子像素均由第2n+1行栅线驱动，n为大于1的整数；
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n-1行的白色子像素由第2n-1行栅线驱动，第2n行的白色子像素由第2n+1行栅线驱动，第2n-1行的单色子像素和第2n行的单色子像素均由第2n行栅线驱动，n为大于1的整数。
可以看出，本实施例的栅线区分奇数行和偶数行，奇数行和偶数行由不同的栅极驱动电路控制，对于现有的显示装置来说，在显示装置的刷新频率为60Hz时，假设显示装置设置有K行子像素，逐行驱动扫描下，每行子像素的充电时间为1/(K*60)s，而对于本实施例的显示装置来说，对于奇数行子像素来说，奇数行子像素的充电时间为1/[(K/2)*60]s，因此，奇数行子像素的充电时间为现有显示装置子像素充电时间的两倍，同理，偶数行子像素的充电时间也为现有显示装置子像素充电时间的两倍。
进一步地，在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n行和第2n+1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素；
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n行和第2n-1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素。
如图4所示，其中虚线框内的6个子像素即为一个像素单元。
进一步地，在列方向上距离最近的单色子像素的颜色可以不同，这样能够更好地进行色彩的调制，提高显示装置的显示质量。
进一步地，所述第一单色子像素、第二单色子像素和第三单色子像素选自红色子像素、绿色子像素和蓝色子像素中的任一个；或
所述第一单色子像素、第二单色子像素和第三单色子像素选自品红色子像素、青色子像素和黄色子像素中的任一个。
实施例二
本实施例还供了一种显示装置，包括上述的阵列基板。具体实施例中，由于单色子像素和白色子像素以不同的栅线进行驱动，因此可以设置第一栅极驱动电路和第二栅极驱动电路，通过第一栅极驱动电路驱动单色子像素进行显示，通过第二栅极驱动电路驱动白色子像素进行显示。
具体实施例中，如图4所示，由于单色子像素和白色子像素以不同的栅线进行驱动，因此可以设置第一栅极驱动电路和第二栅极驱动电路，通过第一栅极驱动电路驱动单色子像素进行显示，通过第二栅极驱动电路驱动白色子像素进行显示。
具体地，所述第一栅极驱动电路与奇数行栅线连接，所述第二栅极驱动电路与偶数行栅线连接；或
所述第一栅极驱动电路与偶数行栅线连接，所述第二栅极驱动电路与奇数行栅线连接。
进一步地，所述第一栅极驱动电路和所述第二栅极驱动电路分列所述阵列基板的显示区域的两侧。如果第一栅极驱动电路和所述第二栅极驱动电路位于阵列基板的显示区域的同一侧，则势必会增加栅线的不必要的长度，因此，第一栅极驱动电路和所述第二栅极驱动电路分列所述阵列基板的显示区域的两侧，能够尽量减少栅线的长度，降低栅线的电阻，从而降低扫描驱动信号的损耗。
进一步地，所述显示装置还包括与所有数据线均连接的源极驱动电路，源极驱动电路与所有数据线连接，在第一栅极驱动电路和所述第二栅极驱动电路输出扫描驱动信号，开启子像素对应的开关薄膜晶体管后，源极驱动电路向所有数据线输出数据电压，为子像素进行充电。
实施例三
本实施例还提供了一种上述显示装置的驱动方法，在进行显示时，控制第一栅极驱动电路向对应栅线输入信号，驱动单色子像素进行显示；控制第二栅极驱动电路向对应栅线输入信号，驱动白色子像素进行显示。
具体实施例中，第一栅极驱动电路可以与偶数行栅线连接，所述第二栅极驱动电路可以与奇数行栅线连接，第k行像素单元中的白色子像素通过第2k-1和第2k+1行栅线进行驱动，第k行像素单元中的单色子像素通过第2k行栅线进行驱动。这样在驱动第k行像素单元进行显示时，控制第一栅极驱动电路向第2k行栅线输入扫描驱动信号，控制第二栅极驱动电路向第2k-1和第2k+1行栅线输入扫描驱动信号；在驱动第k+1行像素单元进行显示时，控制第一栅极驱动电路向第2k+2行栅线输入扫描驱动信号，控制第二栅极驱动电路向第2k+1和第2k+3行栅线输入扫描驱动信号；在驱动第k+2行像素单元进行显示时，控制第一栅极驱动电路向第2k+4行栅线输入扫描驱动信号，控制第二栅极驱动电路向第2k+3和第2k+5行栅线输入扫描驱动信号。可以看出，在第k行像素单元和第k+1行像素单元进行显示时，第2k+1行栅线都会被输入驱动信号，第2k+1行栅线对应的白色子像素将被充电，从而能够进一步增加白色子像素的充电时间，改善显示装置的显示效果。
图5为本发明实施例显示装置的数据输出示意图，图6为本发明实施例显示装置的驱动电路的示意图。如图5所示，显示装置的刷新频率为60Hz，在显示过程中，开启由红绿蓝发光二极管组成的背光源，在向红绿蓝子像素输出扫描驱动信号的同时，也向白色子像素输出扫描驱动信号。如图6所示，在驱动芯片内部，为了能够分奇数行和偶数行驱动白色子像素和红绿蓝子像素，奇数行栅线和偶数行栅线拥有各自独立的buffer(缓存)结构。通过偶数行的栅线向显示面板的红绿蓝子像素输入扫描驱动信号；同样，通过奇数行的栅线向显示面板的白色子像素输入扫描驱动信号，同时背光的RGB LED(发光二极管)会按照Red(红)，Green(绿)，Blue(蓝)的顺序做驱动。
当然，还可以通过奇数行的栅线向显示面板的红绿蓝子像素输入扫描驱动信号，通过偶数行的栅线向显示面板的白色子像素输入扫描驱动信号。
本实施例中，在像素结构中添加了白色子像素，能够增加显示装置的透过率和对比度，并且在显示装置进行显示时，白色子像素与现有的单色子像素以不同的栅线进行驱动，即白色子像素与单色子像素分别进行驱动，进而能够增加子像素的充电时间，改善显示装置的显示效果。另外，白色子像素与单色子像素是分别进行驱动，因此，对液晶反应速度的要求降低，解决了产生混色的问题和色分解的问题，能够进一步改善显示装置的显示效果。并且由于白色子像素与单色子像素是分别进行驱动，因此，可以将子像素的面积设计的比较大，也能够保证显示装置的像素密度，如果将子像素的面积设计的较大，还可以减少数据线的数量，进而减少源极驱动电路占用的面积，提高显示装置的开口率。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (11)

1.一种阵列基板，包括形成在衬底基板上成行排布的栅线、成列排布的数据线和由栅线和数据线限定出的多个成矩阵排布的子像素，其特征在于，多个子像素包括第一单色子像素、第二单色子像素、第三单色子像素和白色子像素，第一单色子像素、第二单色子像素和第三单色子像素发出的单色光能够混合成白光，其中，单色子像素由偶数行栅线驱动，白色子像素由奇数行栅线驱动；或单色子像素由奇数行栅线驱动，白色子像素由偶数行栅线驱动；
每行子像素和每列子像素中，单色子像素和白色子像素均交替排布；
其中，奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素；或奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素。
2.根据权利要求1所述的阵列基板，其特征在于，
在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n-1行的白色子像素和第2n行的白色子像素均由第2n行栅线驱动，第2n+1行的单色子像素和第2n行的单色子像素均由第2n+1行栅线驱动，n为大于1的整数；或
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n-1行的白色子像素由第2n-1行栅线驱动，第2n行的白色子像素由第2n+1行栅线驱动，第2n-1行的单色子像素和第2n行的单色子像素均由第2n行栅线驱动，n为大于1的整数。
3.根据权利要求2所述的阵列基板，其特征在于，在奇数行子像素包括第一单色子像素、第二单色子像素和白色子像素，偶数行子像素包括第三单色子像素和白色子像素时，第2n行和第2n+1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素；或
在奇数行子像素包括第三单色子像素和白色子像素，偶数行子像素包括第一单色子像素、第二单色子像素和白色子像素时，第2n行和第2n-1行子像素中距离最近的6个子像素组成一像素单元，每一像素单元包括第一单色子像素、第二单色子像素、第三单色子像素和3个白色子像素。
4.根据权利要求1所述的阵列基板，其特征在于，在列方向上距离最近的单色子像素的颜色不同。
5.根据权利要求1-4中任一项所述的阵列基板，其特征在于，
所述第一单色子像素、第二单色子像素和第三单色子像素选自红色子像素、绿色子像素和蓝色子像素中的任一个；或
所述第一单色子像素、第二单色子像素和第三单色子像素选自品红色子像素、青色子像素和黄色子像素中的任一个。
6.一种显示装置，其特征在于，包括如权利要求1-5中任一项所述的阵列基板。
7.根据权利要求6所述的显示装置，其特征在于，所述显示装置还包括第一栅极驱动电路和第二栅极驱动电路，第一栅极驱动电路用于驱动单色子像素进行显示，第二栅极驱动电路用于驱动白色子像素进行显示。
8.根据权利要求7所述的显示装置，其特征在于，
所述第一栅极驱动电路与奇数行栅线连接，所述第二栅极驱动电路与偶数行栅线连接；或
所述第一栅极驱动电路与偶数行栅线连接，所述第二栅极驱动电路与奇数行栅线连接。
9.根据权利要求7所述的显示装置，其特征在于，所述第一栅极驱动电路和所述第二栅极驱动电路分列所述阵列基板的显示区域的两侧。
10.根据权利要求7所述的显示装置，其特征在于，所述显示装置还包括与所有数据线均连接的源极驱动电路。
11.一种如权利要求7-10中任一项所述显示装置的驱动方法，其特征在于，在进行显示时，控制第一栅极驱动电路向对应栅线输入信号，驱动单色子像素进行显示；控制第二栅极驱动电路向对应栅线输入信号，驱动白色子像素进行显示。
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