CN112150953B - 一种显示装置及其显示方法 - Google Patents
一种显示装置及其显示方法 Download PDFInfo
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Abstract
本发明实施例提供一种显示装置及其显示方法,涉及显示技术领域,能够降低时钟信号线上加载的信号对触控Sensor产生的耦合噪声。显示装置包括显示面板和时序控制器;显示面板包括栅极驱动电路和触控结构层;显示面板中设置有与栅极驱动电路和时序控制器连接的时钟信号线;栅极驱动电路输出的扫描信号由时序控制器通过时钟信号线输入的时钟信号提供;显示装置在每一图像显示帧内包括显示阶段和非显示阶段;时序控制器配置为在显示阶段向时钟信号线输入第一周期的第一时钟信号,在非显示阶段向时钟信号线输入第二周期的第二时钟信号。
Description
技术领域
本发明涉及显示技术领域,尤其涉及一种显示装置及其显示方法。
背景技术
在显示装置中,栅极驱动电路的功能是一行一行地有序输出TFT(Thin FilmTransistor)器件的开态电压(即扫描信号);其中,扫描信号是由时钟信号线输入的时钟信号提供的。
在此情况下,在显示的过程中,通过时钟信号线向栅极驱动电路提供时钟信号时,时钟信号线上加载的信号会对显示装置中其他的器件产生不良影响。例如,显示装置中的触控传感单元(Sensor)因受到时钟信号线上加载的信号的产生耦合噪声,进而造成触控Sensor出现乱报点的问题。
发明内容
本发明的实施例提供一种显示装置及其显示方法,能够降低时钟信号线上加载的信号对触控Sensor产生的耦合噪声。
为达到上述目的,本发明的实施例采用如下技术方案:
本发明实施例提供一种显示装置,包括显示面板和时序控制器;所述显示面板包括栅极驱动电路和触控结构层,所述显示面板中设置有与所述栅极驱动电路和所述时序控制器连接的时钟信号线;所述栅极驱动电路输出的扫描信号由所述时序控制器通过所述时钟信号线输入的时钟信号提供;所述显示装置在每一图像显示帧内包括显示阶段和非显示阶段;所述时序控制器配置为在所述显示阶段向所述时钟信号线输入第一周期的第一时钟信号,在所述非显示阶段向所述时钟信号线输入第二周期的第二时钟信号。
在一些实施例中,所述第一周期和所述第二周期相等。
在一些实施例中,第一时钟信号和所述第二时钟信号形成等周期的连续时钟信号。
在一些实施例中,所述触控结构层在所述显示面板中的衬底基板上的正投影与所述时钟信号线在所述显示面板中的衬底基板上的正投影具有交叠区域。
在一些实施例中,所述栅极驱动电路包含GOA电路。
在一些实施例中,所述显示面板在两个相对的侧边均设置:多条时钟信号线以及与所述多条时钟信号线连接的GOA电路。
在一些实施例中,所述显示装置为液晶显示装置;所述液晶显示装置包括阵列基板以及与所述阵列基板对合的对合基板;所述触控结构层制作在所述对合基板中的衬底背离所述阵列基板的一侧的表面。
在一些实施例中,所述显示装置为OLED显示装置;所述OLED显示装置包括OLED阵列以及封装所述OLED阵列的封装结构;所述触控结构层制作在所述封装结构背离所述OLED阵列的一侧的表面。
本发明实施例提供一种如前述的显示装置的显示方法,包括:控制时序控制器通过时钟信号线向栅极驱动电路,在显示阶段输入第一周期的第一时钟信号,在非显示阶段向输入第二周期的第二时钟信号。
在一些实施例中,所述控制时序控制器通过时钟信号线向栅极驱动电路,在显示阶段输入第一周期的第一时钟信号,在非显示阶段向输入第二周期的第二时钟信号包括:控制时序控制器通过时钟信号线向栅极驱动电路在显示阶段和非显示阶段连续输入同一周期的连续时钟信号。
本发明的实施例提供一种显示装置及其显示方法,该显示装置,包括显示面板和时序控制器;显示面板包括栅极驱动电路和触控结构层,显示面板中设置有与栅极驱动电路和时序控制器连接的时钟信号线;栅极驱动电路输出的扫描信号由时序控制器通过时钟信号线输入的时钟信号提供;显示装置在每一图像显示帧内包括显示阶段和非显示阶段;时序控制器配置为在显示阶段向时钟信号线输入第一周期的第一时钟信号,在非显示阶段向时钟信号线输入第二周期的第二时钟信号。
相比于相关技术的显示装置中,时序控制器在显示阶段向时钟信号线输入时钟信号,在非显示阶段停止输入时钟信号,而输入低电平电压,导致在进入非显示阶段,时钟信号线上的信号在由高电平转入低电平,以及在非显示阶段的最后,时钟信号线上的信号由低电平转入高电平时,对触控结构层上的触控信号产生严重的耦合噪音(Noise)。在本发明实施例提供的显示装置中,时序控制器在显示阶段和非显示阶段均向时钟信号线输入时钟信号,这样一来,避免了在非显示阶段因时钟信号线停止输出时钟信号,而导致的触控结构层上产生出现较大的耦合噪音的问题,保证了在非显示阶段,时钟信号线上的信号对触控结构层上的触控信号产生的耦合噪音,与显示阶段基本一致,处于可以接受的范围内,从而降低了触控结构层出现乱报点的几率,进而提高了显示装置的产品良率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种显示面板的结构示意图;
图2为本发明实施例提供的一种显示面板的电路结构示意图;
图3为本发明实施例提供的一种显示面板的结构示意图;
图4为相关技术中提供的一种显示装置的时序信号图;
图5为采用图4的时序信号下,触控结构层产生的噪音的波形图;
图6为本发明实施例提供的一种显示装置的时序信号图;
图7为本发明实施例提供的一种显示装置的时序信号图;
图8为采用图7的时序信号下,触控结构层产生的噪音的波形图;
图9为本发明实施例提供的一种显示面板的结构示意图;
图10为本发明实施例提供的一种显示面板的结构示意图;
图11为采用图4的时序信号下,触控结构层的不同位置处产生的相对噪音分布表;
图12为采用图7的时序信号下,触控结构层的不同位置处产生的相对噪音分布表;
图13为本发明实施例提供的一种显示装置的布局剖面示意图。
具体实施方式
下面将结合本申请实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅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他实施例,都属于本发明保护的范围。
除非另外定义,本申请实施例中使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本发明实施例中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同,而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接,而是可以包括电性的连接,不管是直接的还是间接的。
此外,本申请中,“上”、“下”、“左”、“右”、“水平”以及“竖直”等方位术语是相对于附图中的部件示意置放的方位来定义的,应当理解到,这些方向性术语是相对的概念,它们用于相对于的描述和澄清,其可以根据附图中部件所放置的方位的变化而相应地发生变化。
本发明实施例提供一种显示装置(也可以称为触控显示装置),该显示装置可以为手机、电脑、笔记本电脑、平板电脑、个人数字助理(personal digital assistant,PDA)、车载电脑、电视等。该显示装置包括框架、设置于框架内的显示面板、时序控制电路(TimingController,TCON)、电路板、显示驱动IC以及其他电子配件等。
上述显示面板可以为:液晶显示面板(Liquid Crystal Display,简称LCD)、有机发光二极管(Organic Light Emitting Diode,简称OLED)显示面板、量子点发光二极管(Quantum Dot Light Emitting Diodes,简称QLED)显示面板、微发光二极管(Micro LightEmitting Diodes,简称Micro LED)显示面板等,本发明对此不做具体限定。
本发明以下实施例均是以上述显示装置采用液晶显示面板为例进行说明的。
如图1所示,上述显示面板001包括:显示区1(active area,AA;简称AA区;也可称为有效显示区)和围绕显示区1一圈设置的周边区2。
上述显示面板001在显示区1中包括多种颜色的亚像素(sub pixel)P,该多种颜色的亚像素至少包括第一颜色亚像素、第二颜色亚像素和第三颜色亚像素,第一颜色、第二颜色和第三颜色为三基色(例如红色、绿色和蓝色)。
为了方便说明,本申请中上述多个亚像素P是以矩阵形式排列为例进行的说明。在此情况下,沿水平方向X排列成一排的亚像素P称为同一行亚像素;沿竖直方向Y排列成一排的亚像素P称为同一列亚像素。
如图2所示,每一亚像素P中均设置有像素电路S,该像素电路S包括晶体管T和液晶电容C。该液晶电容C的两个极板分别由像素电极和公共电极构成。其中,位于同一行的(亚像素P中)像素电路S的晶体管T的栅极与同一栅线(Gate Line)GL连接,位于同一列的(亚像素P中)像素电路S的晶体管T的一极(例如源极)与同一数据线(Data Line)DL连接。
参考图1所示,显示面板001在周边区2设置有栅极驱动电路01和数据驱动电路02。在一些实施例中,栅极驱动电路01可以设置在沿栅线GL的延伸方向上的侧边,数据驱动电路02可以设置在沿数据线线DL的延伸方向上的侧边,以通过栅极驱动电路01和数据驱动电路02驱动显示面板001中的像素电路S,进行画面显示。
在一些实施例中,上述栅极驱动电路01可以为栅极驱动IC(也可以称为Gate IC)。在一些实施例中,上述栅极驱动电路01可以为GOA(Gate Driver on Array,GOA)电路,也即上述栅极驱动电路01直接集成在显示面板001的阵列基板中。其中,将栅极驱动电路01设置为包含GOA电路相比于设置为栅极驱动IC而言,一方面,可以降低显示面板的制作成本;另一方面,还可以窄化显示装置的边框宽度。以下实施例均是以栅极驱动电路01包含GOA电路为例进行说明。
另外,在一些实施例中,如图2所示,上述GOA电路可以设置在显示面板001的周边区2的单侧,从单侧逐行依次驱动各栅线GL,即单侧驱动。在另一些实施例中,显示面板001可以在周边区2中沿栅线GL的延伸方向上相对的两个侧边分别设置GOA电路,通过两个GOA电路同时从两侧逐行依次驱动各栅线GL,即双边同时驱动。在另一些实施例中,如图3所示,显示面板001可以在周边区2中沿栅线GL的延伸方向上相对的两个侧边,分别设置GOA电路(01和01’),通过两个GOA电路交替从两侧,逐行依次驱动各栅线GL,即双边交叉驱动;例如,即GOA电路(01)与位于奇数行的栅线连接,GOA电路(01’)与位于偶数行的栅线连接;本发明对此不做具体限定。
以下对GOA电路的具体结构以及连接关系进行说明。
示例的,如图2所示,GOA电路(01)中包括N级级联的移位寄存器(RS1、RS2……RS(N)),在此情况下,显示面板PNL中包括与N级级联的移位寄存器(RS1、RS2……RS(N))分别一一对应连接的N条栅线(G1、G2……G(N)),其中,N为正整数。
对于上述GOA电路(01)中的移位寄存器(RS1、RS2……RS(N))而言,其内部设置有时钟信号端CLK;显示面板001位于侧边的周边区2中设置时钟信号线CK(可以包括:CK1、CK2),时钟信号线CK的一端与移位寄存器的时钟信号端CLK连接,另一端与TCON(图2中未示出)连接;GOA电路(01)输出的扫描信号,由TCON通过时钟信号线CK输入的时钟信号提供。
当然,可以理解的是,在一些实施例中,显示面板001还可以设置有其他控制类的时钟信号线CK,也即该时钟信号线CK提供的时钟信号并不用于提供扫描信号,该控制类的时钟信号线CK同样与TCON和移位寄存器连接,以通过TCON提供相关的控制类时钟信号,对移位寄存器进行相关的控制,本发明中涉及的时钟信号线,并不限制于提供扫描信号的时钟信号线,也可以包括与GOA电路连接的其控制类的时钟信号线。
在此基础上,如图2所示,GOA电路(01)中的依次设置的移位寄存器的时钟信号端CLK周期性的与多条时钟信号线CK连接。
示例的,在一些实施例中,如图2中示出的,显示面板001中设置有两条时钟信号线CK:第一时钟信号线CK1和第二时钟信号线CK2。第一时钟信号线CK1与位于奇数级的移位寄存器(RS1、RS3、RS5……)的时钟信号端CLK连接,第二时钟信号线CK2与位于偶数级的移位寄存器(RS2、RS4、RS6……)的时钟信号端CLK连接。
示例的,在一些实施例中,如图3中示出的,显示面板001在左侧边设置GOA电路(01),在右侧边设置右侧的GOA电路(01’);并且显示面板001中设置有四条时钟信号线CK:第一时钟信号线CK1、第二时钟信号线CK2、第三时钟信号线CK3、第四时钟信号线CK4;其中,第一时钟信号线CK1和第三时钟信号线CK3设置于左侧边,第二时钟信号线CK2和第四时钟信号线CK4设置于右侧边。
上述为由左侧边的GOA电路(01)中的依次设置的移位寄存器的时钟信号端CLK周期性的与位于左侧边的第一时钟信号线CK1和第三时钟信号线CK3连接。示例的,如图3所示,第一时钟信号线CK1与GOA电路(01)中的位于奇数级的移位寄存器(RS1、RS3、RS5……)的时钟信号端CLK连接;第三时钟信号线CK3与GOA电路(01)中的位于偶数级的移位寄存器(RS2、RS4、RS6……)的时钟信号端CLK连接)。
上述位于右侧边的GOA电路(01’)中的依次设置的移位寄存器的时钟信号端CLK周期性的与位于右侧边的第二时钟信号线CK2和第四时钟信号线CK4连接。示例的,如图3所示,第二时钟信号线CK2与GOA电路(01’)中的位于奇数级的移位寄存器(RS1、RS3、RS5……)的时钟信号端CLK连接;第四时钟信号线CK4与GOA电路(01’)中的位于偶数级的移位寄存器(RS2、RS4、RS6……)的时钟信号端CLK连接)。
在一些实施例中,显示面板001中设置有八条时钟信号线CK;以双边交叉驱动为例,其中,八条时钟信号线CK中四条位于左侧边,四条位于右侧边;左侧边的GOA电路中的依次设置的移位寄存器的时钟信号端CLK周期性的与位于左侧边的四条时钟信号线CK连接;右侧边的GOA电路中的依次设置的移位寄存器的时钟信号端CLK周期性的与位于右侧边的四条时钟信号线CK连接。
在此基础上,本领域的技术人员可知,如图2所示,在GOA电路中,移位寄存器还设置有信号输入端Input(附图以及下文均简写为Iput)、信号输出端Output(下文以及附图均简写为Oput)、复位信号端Reset(附图以及下文均简写为RST),并且GOA电路(01)中各级移位寄存器的电路结构相同。
如图2所示,除前一级或者多级移位寄存器的信号输入端Iput(示例的,如图2中的RS1、RS2)与起始信号端(STV1、STV2)连接,除与起始信号端(STV1、STV2)连接的移位寄存器以外,其他任一级移位寄存器的信号输入端Iput与位于其前级(可以相邻,也可以不相邻)的移位寄存器的信号输出端Oput连接;最后一级或多级移位寄存器的复位信号端RST独立设置或者与前述的起始信号端(STV1、STV2)连接;除最后一级或多级移位寄存器以外,任一级移位寄存器的复位信号端RST与位于其后级(可以相邻,也可以不相邻)的移位寄存器的信号输出端Oput连接。
在此基础上,如图3所示,显示面板001中还设置有触控结构层03,该触控结构层03包括交叉设置的多个发射电极(也可以称为驱动电路)Tx(Tx1、Tx2、Tx3……)和多个感应电极Rx(Rx1、Rx2、Rx3……),以通过发射电极Tx和感应电极Rx进行触摸控制;本发明中对于发射电极Tx和感应电极Rx的具体设置方式不做限定。
示例的,在一些实施例中,如图3所示,每一发射电极(Tx1、Tx2、Tx3……)包括多个发射子电极,感应电极(Rx1、Rx2、Rx3……)包括多个感应子电极;其中,发射子电极和感应子电极位于同层,也即发射子电极和感应子电极通过一次制作工艺加工制作而成。发射电极Tx和感应电极Rx中的子电极,一个采用桥连接的方式电连接,另一个为一体结构(也即直接接触式电连接);发射子电极和感应子电极形成触控传感单元(即触控Sensor)。
在一些实施例中,如图3所示,上述触控结构层03在显示面板001中的衬底基板上的正投影与时钟信号线CK(CK1、CK3)在显示面板001中的衬底基板上的正投影具有交叠区域。
在此基础上,显示装置在显示时,每一图像显示帧(Frame,F)内包括显示阶段(Display)和非显示阶段(Blank)。
参考图4,相关技术中,TCON在显示阶段(Display)通过时钟信号线CK向GOA电路的时钟信号端CLK输入时钟信号,并在非显示阶段(Blank)停止输入时钟信号,而输入低电平电压。也即时钟信号线CK加载的信号,在显示阶段(Display)处于抖动(Toggle)状态,在非显示阶段(Blank)处于非抖动状态。在此情况下,在显示过程中,参考图5,在进入非显示阶段(Blank),时钟信号线上的信号在由高电平转入低电平,以及在非显示阶段的最后,时钟信号线上的时钟信号由低电平转入高电平时,时钟信号线上的信号会对触控结构层03上的触控信号产生严重的耦合噪音(Noise);尤其是在与时钟信号线正对位置处的触控结构层03上产生的噪音尤为明显,其噪音可以达到770mV,从而容易导致触控结构层03在边缘位置出现乱报点的现象。
相比于之下,如图6所示,本发明实施例提供的显示装置中,将TCON配置为在显示阶段(Display)向时钟信号线CK输入第一周期T1的第一时钟信号,在非显示阶段(Blank)向时钟信号线CK输入第二周期T2的第二时钟信号。
也就是说,在本发明实施例提供的显示装置中,TCON在显示阶段(Display)和非显示阶段(Blank)向时钟信号线CK均输入时钟信号,这样一来,避免了在非显示阶段(Blank)因停止向时钟信号线CK输入时钟信号,而导致与时钟信号线正对位置处的触控结构层03在非显示阶段(Blank)产生出现较大的耦合噪音(Noise),保证了在非显示阶段(Blank),时钟信号线CK上的信号对触控结构层03上的触控信号产生的耦合噪音,与显示阶段(Display)基本一致,处于可以接受的范围内,从而降低了触控结构层出现乱报点的几率,进而提高了显示装置的产品良率。
另外,对于TCON在显示阶段(Display)向时钟信号线输入的第一时钟信号而言,可以理解的是,其周期(T1)的大小可以根据GOA电路的驱动扫描进行设定。而对于TCON在非显示阶段(Blank)向时钟信号线CK输入的第二时钟信号的周期(T2)的大小,本发明不做具体限制。另外,还可以理解的是,时钟信号线CK在非显示阶段(Blank)输入的第二时钟信号不会对正常的扫描信号造成任何影响。
示例的,在一些实施例中,如图6所示,可以设置TCON在非显示阶段(Blank)向时钟信号线CK输入的第二时钟信号的周期(T2)小于在显示阶段(Display)向时钟信号线CK输入的第一时钟信号的周期(T1)。
示例的,在一些实施例中,可以设置TCON在非显示阶段(Blank)向时钟信号线CK输入的第二时钟信号的周期(T2)大于在显示阶段(Display)向时钟信号线CK输入的第一时钟信号的周期(T1)。
示例的,在一些实施例中,为了简化控制,可以设置TCON在非显示阶段(Blank)向时钟信号线CK输入的第二时钟信号的周期(T2)可以等于在显示阶段(Display)向时钟信号线CK输入的第一时钟信号的周期(T1),即T1=T2。
当然,为了更进一步的简化控制,在一些实施例中,如图7所示,可以设置TCON在非显示阶段(Blank)向时钟信号线CK输入的第二时钟信号与在显示阶段(Display)向时钟信号线CK输入的第一时钟信号形成等周期的连续时钟信号。
在此情况下,相比于图5中在非显示阶段(Blank),时钟信号线CK上加载的信号会对触控结构层03上的触控信号产生较大的耦合噪音而言,如图8所示,上述在TCON在非显示阶段(Blank)和显示阶段(Display)向时钟信号线CK输入的等周期的连续时钟信号的情况下,能够明显降低对触控结构层03上的触控信号产生耦合噪音(在一些实施例中,可以降低至330mV),进而降低了触控结构层03在边缘位置出现乱报点的几率,提高了显示装置的产品良率。另外,可以理解的是,图8中在非显示阶段(Blank)的最后出现的噪音主要是受下一图像显示帧F的起始信号STV的影响。
另外,对于上述触控结构层03的具体设置而言,本发明不做具体限定;但可以理解的是,对于采用On-cell结构的触控结构层03而言,由于触控结构层03与GOA电路以及时钟信号线CK的垂直距离较近,并且两者之间还设置有黑矩阵(尤其是对于采用较大介电常数的黑矩阵),在此情况下,采用本发明的显示装置通过TCON在非显示阶段(Blank)和显示阶段(Display)均输入时钟信号,对降低触控结构层03在与时钟信号线正对位置的边缘位置处产生的耦合噪音尤为明显。
以下对液晶显示装置和OLED显示装置中,On-cell结构的触控结构层03的具体设置作进一步的说明。
对液晶显示装置而言,如图9所示,液晶显示装置中的显示面板001包括阵列基板11以及与阵列基板11对合的对合基板12,阵列基板11与对合基板12之间为液晶盒(液晶层)13,上述On-cell结构的触控结构层03制作在对合基板12中的衬底22背离阵列基板11的一侧的表面。
示例的,如图9所示,在一些实施例中,对合基板12为彩膜基板,该彩膜基板包括设置于衬底22上的彩色滤光层CF和黑矩阵图案BM,触控结构层03制作(集成)在衬底22背离彩色滤光层CF和黑矩阵图案BM一侧的表面,并且在触控结构层03背离衬底22的一侧可以设置有上偏光片32;下偏光片31设置于阵列基板11中的衬底21背离彩膜基板(12)的一侧。
示例的,在另一些实施例中,采用色阻集成(Color Filter On Array,简称COA)技术将彩色滤光层和黑矩阵图案集成在阵列基板中,在此情况下,触控结构层03制作(集成)在位于对合基板中的衬底背离阵列基板的一侧的表面;同样,在触控结构层03背离阵列基板的一侧可以设置上偏光片,下偏光片设置于阵列基板中的衬底背离彩膜基板的一侧。
对于OLED显示装置而言,如图10所示,OLED显示装置中的显示面板001包括设置于衬底上的OLED阵列41以及封装OLED阵列41的封装结构42;上述On-cell结构的触控结构层03制作(集成)在封装结构42背离OLED阵列41的一侧的表面。
对于上述封装结构42而言,在一些实施例中,封装结构42可以为盖板封装结构;在一些实施例中,封装结构42可以为薄膜封装结构;本发明对此不做具体限定。
在此基础上,申请人通过在相关技术以及本发明的液晶显示装置中的On-cell结构的触控结构层03上贴附铜片,对触控结构层03产生的耦合噪音进行实际的对比检测;相关技术中时钟信号线CK输入图4中示出的信号,本发明中时钟信号线CK采用图7中示出的信号,对比可以看出,两者在显示阶段(Display)完全相同(包括周期和幅值),区别仅在于图4的时钟信号在非显示阶段(Blank)为低电平电压,而图7的时钟信号在非显示阶段(Blank)为与显示阶段(Display)连续的时钟信号;另外,设置相关技术中以及本发明的液晶显示装置中触控结构层03上施加的基准容值(基准Rawdata)以及其他显示、触控的相关电信号均一致。
在此情况下,通过对位于触控结构层03上的铜片上的信号的实际检测,参考图11(对应采用图4中时钟信号),对应触控结构层03在与时钟信号线正对位置的边缘位置(对应图11中位于两侧的加粗数值),可以看出,边缘位置的耦合噪音明显要高于位于中间区域的噪音;相比之下,参考图12(采用图7中时钟信号),对应触控结构层03在与时钟信号线正对位置的边缘位置(对应图12中位于两侧的加粗数值),可以看出,边缘位置的耦合噪音大幅减小。
以下对上述相关技术以及本发明的液晶显示装置中的On-cell结构的触控结构层03上产生的耦合噪音的大小进行具体的对比说明。
参考图13中示出的显示面板001在设置GOA电路的一侧周边区2的局剖面图;其中,图13中的时钟信号线CK可以为多条,也可以为一条,图13中仅是以一条时钟信号线为例进行说明的。如图13所示,发射电极Tx与时钟信号线CK之间形成第一电容C1,感应电极Rx与时钟信号线CK之间形成第二电容C2,发射电极Tx与感应电极Rx之间形成第三电容C3;发射电极Tx上的电压为VTx,感应电极Rx上的电压为VRx。
在显示装置进行正常触控显示时,发射电极Tx与感应电极Rx之间的基准容值(基准Rawdata)是基于触控模组中的触控IC(即TP IC)收集多帧(例如200帧)的电容值后取平均值后得到的;其中,基准Rawdata的大小是基于感应电极Rx通道电荷放大器向感应电极Rx的输入电荷的多少决定的;其中,电荷放大器的输入输出方程:V0=-Q/CF(V0为电荷放大器的输出电压,Q为输入电荷,CF为反馈电容)。
在一图像显示帧的显示阶段(Display),时钟信号线CK上加载的信号处于抖动(toggle)状态,即在高电平电压VGH和低电平电压VGL之间切换;在此情况下,在时钟信号线上加载的时钟信号为高电平电压VGH时,时钟信号线CK与触控节点间的电容的电荷量Q1=C3(VTx-VRx)+C1(VTx-VGH)+C2(VRx-VGH);在时钟信号线上加载的时钟信号为低电平电压VGL时,时钟信号线CK与触控节点间的电容的电荷量Q1=C3(VTx-VRx)+C1(VTx-VGL)+C2(VRx-VGL)。假设忽略C1的存在(但不影响C3充满电),在此情况下,在一个触控周期结束后,C3两端的电压分别为VTx和VRx;感应电极Rx通道电荷放大器的输入电荷Q2=C3(VTx-VRx)+C2(VRx-VC),其中VC为高电平电压VGH和低电平电压VGL之间的一个电压;当然,在显示面板的一侧周边区2设置有4条时钟信号线CK时,感应电极Rx通道电荷放大器的输入电荷Q2=C3(VTx-VRx)+4C2(VRx-VC)。
在一图像显示帧的非显示阶段(Blank),相关技术中,时钟信号线上加载的时钟信号线CK上加载的信号切换至低电平电压VGL,此时,感应电极Rx通道电荷放大器的输入电荷Q2=C3(VTx-VRx)+C2(VRx-VGL)。当然,在显示面板的一侧周边区2设置有4条时钟信号线时,感应电极Rx通道电荷放大器的输入电荷Q2=C3(VTx-VRx)+4C2(VRx-VGL)。
相比之下,本发明的显示装置在一图像显示帧的非显示阶段(Blank),与在显示阶段(Display)感应电极Rx通道电荷放大器的输入电荷Q2=C3(VTx-VRx)+C2(VRx-VC)相同。
由于TP IC使用感应电极Rx通道电荷放大器的输入电荷来确认发射电极Tx与感应电极Rx之间的当前容值(当前Rawdata);发射电极Tx与感应电极Rx之间容值差异(Differ)等于当前Rawdata减基准Rawdata。可以理解的是,容值差异(Differ)对应触控容值的变化量,在此情况下,当由与GOA电路连接的时钟信号线CK上的电压高低变化引起的触控容值变化量超过触控阈值时,会出现触控结构层03误报点的问题。
综上所述,由于VRx-VGL>VRx-VC;也就是说,在一图像显示帧的非显示阶段(Blank),上述相关技术中的感应电极Rx通道电荷放大器的输入电荷,大于本发明的感应电极Rx通道电荷放大器的输入电荷;也即本发明的发射电极Tx与感应电极Rx之间由与GOA电路连接的时钟信号线CK上电压高低变化(On/Off)引入的容值差异(Differ)降低,从而也就降低了在边缘位置处出现乱报点的几率,提高了触控精度。
另外,本发明实施例还提供一种如前述的显示装置的显示方法,该显示方法包括:
控制TCON通过时钟信号线向栅极驱动电路(如前述的GOA电路),在显示阶段(Display)输入第一周期T1的第一时钟信号,在非显示阶段(Blank)向输入第二周期T2的第二时钟信号。
上述TCON在显示阶段(Display)向时钟信号线输入的第一时钟信号的第一周期T1的大小可以根据GOA电路的驱动扫描进行设定。在非显示阶段(Blank)向时钟信号线输入的第二时钟信号的第二周期T2的大小,本发明不做具体限制。
在一些实施例中,为了简化控制过程,上述控制TCON通过时钟信号线向栅极驱动电路(如前述的GOA电路),在显示阶段(Display)输入第一周期T1的第一时钟信号,在非显示阶段(Blank)向输入第二周期T2的第二时钟信号可以包括:
控制TCON通过时钟信号线向栅极驱动电路在显示阶段(Display)和非显示阶段(Blank)连续输入固定周期的时钟信号。
也就是说,TCON在非显示阶段(Blank)向时钟信号线输出的第二时钟信号,与在显示阶段(Display)向时钟信号线输入的第一时钟信号为连续、且同周期的时钟信号。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (9)
1.一种显示装置,包括显示面板和时序控制器;所述显示面板包括栅极驱动电路和触控结构层,其特征在于,
所述显示面板中设置有与所述栅极驱动电路和所述时序控制器连接的时钟信号线;所述栅极驱动电路输出的扫描信号由所述时序控制器通过所述时钟信号线输入的时钟信号提供;
所述显示装置在每一图像显示帧内包括显示阶段和非显示阶段;
所述时序控制器配置为在所述显示阶段向所述时钟信号线输入连续的固定的第一周期的第一时钟信号,在所述非显示阶段向所述时钟信号线输入连续的固定的第二周期的第二时钟信号;
所述触控结构层在所述显示面板中的衬底基板上的正投影与所述时钟信号线在所述显示面板中的衬底基板上的正投影具有交叠区域。
2.根据权利要求1所述的显示装置,其特征在于,所述第一周期和所述第二周期相等。
3.根据权利要求2所述的显示装置,其特征在于,第一时钟信号和所述第二时钟信号形成等周期的连续时钟信号。
4.根据权利要求1所述的显示装置,其特征在于,所述栅极驱动电路包含GOA电路。
5.根据权利要求4所述的显示装置,其特征在于,所述显示面板在两个相对的侧边均设置:多条时钟信号线以及与所述多条时钟信号线连接的所述GOA电路。
6.根据权利要求1-5任一项所述的显示装置,其特征在于,
所述显示装置为液晶显示装置;
所述液晶显示装置包括阵列基板以及与所述阵列基板对合的对合基板;
所述触控结构层制作在所述对合基板中的衬底背离所述阵列基板的一侧的表面。
7.根据权利要求1-5任一项所述的显示装置,其特征在于,
所述显示装置为OLED显示装置;
所述OLED显示装置包括OLED阵列以及封装所述OLED阵列的封装结构;
所述触控结构层制作在所述封装结构背离所述OLED阵列的一侧的表面。
8.一种如权利要求1-7任一项所述的显示装置的显示方法,其特征在于,包括:
控制时序控制器通过时钟信号线向栅极驱动电路,在显示阶段输入第一周期的连续的固定的第一时钟信号,在非显示阶段向输入第二周期的连续的固定的第二时钟信号。
9.根据权利要求8所述的显示装置的显示方法,其特征在于,
所述控制时序控制器通过时钟信号线向栅极驱动电路,在显示阶段输入第一周期的连续的固定的第一时钟信号,在非显示阶段向输入第二周期的连续的固定的第二时钟信号包括:
控制时序控制器通过时钟信号线向栅极驱动电路在显示阶段和非显示阶段连续输入同一周期的连续时钟信号。
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