WO2019205488A1 - 触控显示基板及触控显示驱动方法 - Google Patents

触控显示基板及触控显示驱动方法 Download PDF

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Publication number
WO2019205488A1
WO2019205488A1 PCT/CN2018/108060 CN2018108060W WO2019205488A1 WO 2019205488 A1 WO2019205488 A1 WO 2019205488A1 CN 2018108060 W CN2018108060 W CN 2018108060W WO 2019205488 A1 WO2019205488 A1 WO 2019205488A1
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Prior art keywords
lead
touch display
electrically connected
integrated circuit
electrode
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PCT/CN2018/108060
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English (en)
French (fr)
Inventor
黄耀立
贺兴龙
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武汉华星光电技术有限公司
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Priority to US16/300,057 priority Critical patent/US20190332202A1/en
Publication of WO2019205488A1 publication Critical patent/WO2019205488A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch display substrate and a touch display driving method.
  • the touch panel provides a new human-computer interaction interface that is more direct and user-friendly.
  • the touch panel and the liquid crystal display panel are integrated to form a touch display panel, which can make the liquid crystal display panel have a touch function, and can perform an input operation through a finger, a stylus, etc., and the operation is more intuitive and simple.
  • the touch display panel can be divided into four types: resistive, capacitive, optical, and acoustic.
  • the current mainstream touch technology is capacitive.
  • the touch display panel can be divided into: an embedded touch display panel and an external touch display panel according to different structures.
  • the external touch display panel separately produces the touch panel and the liquid crystal display panel, and then is bonded together to form a display panel with a touch function.
  • the external touch display panel has high manufacturing cost and light transmittance. Lower, thicker modules and other shortcomings.
  • the embedded touch display panel embeds the touch panel function into the liquid crystal display panel, so that the liquid crystal display panel has the functions of displaying and sensing the touch input at the same time, and has lower cost and thickness than the external touch display panel. The advantages of thinner, etc., are favored by major panel manufacturers.
  • the embedded touch display panel is further divided into two types according to different positions of the touch circuit embedded in the liquid crystal display panel: the touch circuit is on the cell type (On Cell), and the other is the touch circuit in the liquid crystal cell type. (In Cell).
  • the touch layer is shared with the common electrode (Vcom) layer of the liquid crystal display panel, specifically, the common electrode layer covered by the entire surface is divided into a plurality of electrode units arranged in an array.
  • the plurality of electrode units are electrically connected to a touch display driver integrated circuit (TDDI) through a lead wire.
  • TDDI touch display driver integrated circuit
  • the frame time is divided into a display phase and a touch sensing phase.
  • the touch display driving integrated circuit provides a common voltage signal (Vcom) to each electrode unit through a wire for screen display, and the touch display driving integrated circuit provides a touch to each electrode unit through a lead during the touch sensing phase. Control the sensing signal for touch sensing.
  • the length of the lead connecting the electrode unit and the touch display driving integrated circuit is different, and the lead wire required for the electrode unit near the touch display driving integrated circuit is required. Short, the resistance of the lead wire is small, the lead length required for the electrode unit far from the touch display driving integrated circuit is long, and the resistance of the lead wire is large.
  • the common voltage signal is transmitted through the lead wire, and the resistance of each lead wire is different. This will cause inconsistencies in the common voltage signals on the different electrode units, resulting in differences in display effects.
  • An object of the present invention is to provide a touch display substrate, which can reduce the difference of common voltage signals on different electrode units and improve the display effect.
  • Another object of the present invention is to provide a touch display driving method, which can reduce the difference of common voltage signals on different electrode units and improve the display effect.
  • the present invention provides a touch display substrate, including: a substrate, a common voltage compensation circuit sequentially arranged on the substrate, an electrode array, and a touch display driving integrated circuit, and the display on the substrate a first lead, a second lead, and a third lead;
  • the electrode array includes a plurality of electrode units arranged in an array, and a first lead is disposed corresponding to each of the electrode units, and the common voltage compensation circuit includes a plurality of switch units respectively corresponding to the plurality of electrode units;
  • Each of the electrode units is electrically connected to the output end of the corresponding switch unit and the touch display driving integrated circuit through the corresponding first lead, and the input ends of the plurality of switch units pass through the second lead and the The touch display driving integrated circuit is electrically connected; the control ends of the plurality of switch units are electrically connected to the touch display driving integrated circuit through the third lead;
  • the touch display driving integrated circuit is configured to control the switching unit to be turned on during a display phase, and simultaneously load a common voltage signal to the first lead and the second lead, and control the switch during a touch sensing phase The unit is turned off and the touch sensing signal is loaded to the first lead.
  • the touch display driving integrated circuit includes: a first pin electrically connected to the second lead, a plurality of second pins electrically connected to the plurality of first leads, and the third The third pin of the lead is electrically connected.
  • the second lead is electrically connected from the first lead to the input end of each switch unit via one side of the electrode array.
  • the third lead is electrically connected from the third lead to the control end of each switch unit via one side of the electrode array.
  • the touch display driving integrated circuit further includes: a fourth pin electrically connected to the second lead.
  • the second lead is electrically connected from the first lead to the input end of each switch unit via one side of the electrode array, and then electrically connected to the fourth lead via the other side of the electrode array. foot.
  • the touch display driving integrated circuit further includes: a fifth pin electrically connected to the third lead.
  • the third lead is electrically connected from the third lead to the control end of each switch unit via one side of the electrode array, and then electrically connected to the fifth lead via the other side of the electrode array. foot.
  • the touch display substrate further includes an electrostatic protection circuit, and the electrostatic protection circuit is disposed on a side of the substrate on which the common voltage compensation circuit is away from the electrode array, and the plurality of first leads are electrically connected to the electrostatic protection circuit.
  • the present invention also provides a touch display driving method, which is applied to the above touch display substrate, and includes the following steps:
  • Step S1 entering the display phase, the switch unit is turned on, the touch display driving integrated circuit simultaneously loads a common voltage signal to the first lead and the second lead, and loads the common voltage signal to the electrode On the unit;
  • Step S2 entering a touch sensing phase, the switch unit is turned off, the touch display driving integrated circuit loads a touch sensing signal to the first lead, and loads the touch sensing signal into the On the electrode unit.
  • the present invention provides a touch display substrate.
  • the touch display substrate includes: a substrate, a common voltage compensation circuit sequentially arranged on the substrate, an electrode array, and a touch display driving integrated circuit. a first lead, a second lead, and a third lead on the substrate; the electrode array includes a plurality of electrode units arranged in an array, and a first lead is disposed corresponding to each of the electrode units, and the common voltage compensation circuit includes a plurality of switch units respectively corresponding to the plurality of electrode units; each of the electrode units is electrically connected to an output end of the corresponding switch unit and the touch display driving integrated circuit through the corresponding first lead
  • the input ends of the plurality of switch units are electrically connected to the touch display driving integrated circuit through the second lead; the control ends of the plurality of switch units are driven by the third lead and the touch display
  • the integrated circuit is electrically connected.
  • the switch unit is turned on, and the touch display driving integrated circuit is the same as the first lead and the second lead Loading the common voltage signal, thereby achieving double-ended drive signal to reduce the difference in the common voltage different electrode unit, enhance the display effect.
  • the invention also provides a touch display driving method, which can reduce the difference of the common voltage signals on different electrode units and improve the display effect.
  • FIG. 1 is a structural view of a first embodiment of a touch display substrate of the present invention
  • FIG. 2 is a structural view of a second embodiment of the touch display substrate of the present invention.
  • FIG. 3 is a flow chart of a touch display driving method of the present invention.
  • the present invention provides a touch display substrate, including: a substrate 10 , a common voltage compensation circuit 40 , an electrode array 20 , and a touch display driving integrated circuit sequentially arranged on the substrate 10 . And a first lead 50, a second lead 60, and a third lead 70 disposed on the substrate 10;
  • the electrode array 20 includes a plurality of electrode units 21 arranged in an array, and a first lead 50 is disposed corresponding to each of the electrode units 21, and the common voltage compensation circuit 40 includes a one-to-one correspondence with the plurality of electrode units 21, respectively.
  • a plurality of switch units 41 each of the electrode units 21 is electrically connected to the output end of the corresponding switch unit 41 and the touch display driving integrated circuit 30 through the corresponding first lead 50, and the input of the plurality of switch units 41
  • the terminals are electrically connected to the touch display driving integrated circuit 30 through the second lead 60; the control ends of the plurality of switch units 41 pass through the third lead 70 and the touch display driving integrated circuit 30 is electrically connected; the touch display driving integrated circuit 30 is configured to control the switching unit 41 to be turned on during the display phase, and simultaneously load the common voltage signal to the first lead 50 and the second lead 60, In the sensing sensing phase, the switching unit 41 is controlled to be turned off, and the touch sensing signal is loaded to the first lead 50.
  • the touch display substrate of the present invention is configured to form an In Cell type touch display panel
  • the In Cell touch display panel includes the touch display substrate of the present invention and is disposed opposite to the touch display substrate.
  • a pixel electrode and a thin film transistor that drives the pixel electrode are formed on the opposite substrate, and the pixel electrode and the electrode unit cooperate to drive liquid crystal rotation in the liquid crystal layer to realize screen display.
  • the touch display driving integrated circuit 30 includes: a first pin 31 electrically connected to the second lead 60, respectively The plurality of first leads 50 are electrically connected to the plurality of second pins 32 and the third leads 33 electrically connected to the third leads 70.
  • the second lead 60 is electrically connected from the first lead 31 to the input end of each switch unit 41 via one side of the electrode array 20 .
  • the third lead 70 is electrically connected from the third lead 33 to the control end of each switch unit 41 via one side of the electrode array 20 .
  • the touch display driving integrated circuit 30 includes: a first pin 31 and a fourth electrically connected to the second lead 60 a pin 34, a plurality of second pins 32 electrically connected to the plurality of first leads 50, and third pins 33 and fifth pins 35 electrically connected to the third leads 70;
  • the second lead 60 is electrically connected from the first lead 31 to the input end of each switch unit 41 via the side of the electrode array 20
  • the other side of the electrode array 20 is then electrically connected to the fourth lead 34.
  • the third lead 70 is electrically connected from the third lead 33 to the control end of each switch unit 41 via one side of the electrode array 20 The other side of the electrode array 20 is then electrically connected to the fifth pin 35.
  • the second lead 60 and the third lead 70 are both routed simultaneously on both sides of the electrode array 20, and simultaneously provide signals through two pins, compared to the first embodiment.
  • the second lead 60 and the third lead 70 are simultaneously routed only on one side of the electrode array 20, which can reduce the impedance on the second lead 60 and the third lead 70, thereby improving the accuracy of signal transmission.
  • one of the second lead 60 and the third lead 70 may be selected to be simultaneously routed on both sides of the electrode array 20 as needed. The other is only routed on one side of the electrode array 20, none of which affects the implementation of the present invention.
  • the switch unit 41 includes a first thin film transistor T1, and the gate, the source and the drain of the first thin film transistor T1 serve as a control terminal, an input terminal and an output terminal of the switch unit 41, respectively.
  • the touch display driving integrated circuit 30 provides a control signal to the switching unit 41 through the third lead 70 to control the switching of the switching unit 41, for example, in the first and second embodiments of the present invention.
  • the thin film transistor T1 is an N-type thin film transistor
  • the touch display driving integrated circuit 30 supplies a high potential control signal to the gate of the first thin film transistor T1 during the display phase, and controls the first thin film transistor T1 to be turned on. In the touch sensing phase, a low potential control signal is supplied to the gate of the first thin film transistor T1 to control the first thin film transistor T1 to be turned off.
  • the touch display substrate of the present invention further includes an electrostatic protection circuit 80 .
  • the electrostatic protection circuit 80 is disposed on the substrate 10 and the common voltage compensation circuit 40 is away from the electrode array 20 .
  • the plurality of first leads 50 are electrically connected to the electrostatic protection circuit 80.
  • the electrostatic protection circuit 80 is configured to prevent the electrode unit 21 from being damaged by static electricity.
  • the electrostatic protection circuit 80 includes a plurality of electrostatic protection units 81, and each electrostatic protection unit 81 corresponds to A first lead 50, each of the electrostatic protection units 81 includes: a second thin film transistor T2 and a third thin film transistor T3, the second thin film transistor T2 is a P-type thin film transistor, and the third thin film transistor T3 is an N-type thin film transistor
  • the source and the gate of the second thin film transistor T2 are both connected to a high voltage signal H, and the drain is electrically connected to the drain of the third thin film transistor T3 and the corresponding first lead 50 thereof.
  • the source and the gate of the third thin film transistor T3 are both connected to a low voltage signal L.
  • the touch display substrate working process of the present invention includes: in the display stage, the touch display driving integrated circuit 30 controls the respective switching units 41 to be turned on by the third lead 70, and is turned to the first lead 50. Simultaneously loading a common voltage signal with the second lead 60, the common voltage signal input by the touch display driving integrated circuit 30 to the first lead 50 is directly loaded onto the electrode unit 21, and is loaded onto the second lead 60. After the voltage signal is input to the first lead 50 via the switch unit 41, it is also loaded onto the electrode unit 21, thereby simultaneously loading the common voltage signal from the common voltage compensation circuit 40 and the touch display driving integrated circuit 30 to the electrode unit 21.
  • a double-ended driving of the common voltage signal is implemented to reduce the difference of the common voltage signals on the different electrode units, thereby improving the display effect; in the touch sensing stage, the touch display driving integrated circuit 30 controls the respective switches through the third lead 70
  • the unit 41 is turned off to prevent the common voltage signal on the second lead 60 from being input to the first lead 50 to interfere with the touch sensing, and the touch
  • the control display driving integrated circuit 30 inputs a touch sensing signal to each of the electrode units 21 via the first lead 50 for touch sensing.
  • the touch display display method is further provided.
  • the present invention further provides a touch display driving method, which is applied to the touch display substrate, and includes the following steps:
  • Step S1 entering the display phase, the switch unit 41 is turned on, and the touch display driving integrated circuit 30 simultaneously loads a common voltage signal to the first lead 50 and the second lead 60, and loads the common voltage signal.
  • the electrode unit 21 To the electrode unit 21;
  • Step S2 entering the touch sensing phase, the switch unit 41 is turned off, the touch display driving integrated circuit 30 loads the touch sensing signal to the first lead 50, and loads the touch sensing signal To the electrode unit 21.
  • the present invention provides a touch display substrate
  • the touch display substrate includes: a substrate, a common voltage compensation circuit sequentially arranged on the substrate, an electrode array, and a touch display driving integrated circuit, and a first lead, a second lead, and a third lead on the substrate
  • the electrode array includes a plurality of electrode units arranged in an array, and a first lead is disposed corresponding to each of the electrode units
  • the common voltage compensation circuit includes respectively a plurality of switch units corresponding to the plurality of electrode units
  • each of the electrode units is electrically connected to an output end of the corresponding switch unit and the touch display driving integrated circuit through the corresponding first lead
  • the input ends of the switch units are electrically connected to the touch display driving integrated circuit through the second lead; the control ends of the plurality of switch units are integrated with the touch display driver through the third lead
  • the circuit is electrically connected.
  • the common voltage signal enables double-ended driving, which can reduce the difference of common voltage signals on different electrode units and improve the display effect.
  • the invention also provides a touch display driving method, which can reduce the difference of the common voltage signals on different electrode units and improve the display effect.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Liquid Crystal (AREA)

Abstract

本发明提供一种触控显示基板及触控显示驱动方法。所述触控显示基板包括：基板、在基板上依次排列的公共电压补偿电路、电极阵列和触控显示驱动集成电路以及设于基板上的第一引线、第二引线及第三引线；电极阵列包括阵列排布的多个电极单元，公共电压补偿电路包括多个开关单元；每一个电极单元均通过其对应的第一引线与其对应的开关单元的输出端及触控显示驱动集成电路电性连接，多个开关单元的输入端均通过第二引线与触控显示驱动集成电路电性连接；在显示阶段，开关单元导通，触控显示驱动集成电路向第一引线和第二引线同时加载公共电压信号，从而实现双端驱动，能够减少不同电极单元上的公共电压信号差异，提升显示效果。

Description

触控显示基板及触控显示驱动方法 技术领域
本发明涉及显示技术领域，尤其涉及一种触控显示基板及触控显示驱动方法。
背景技术
触控面板(Touch panel)提供了一种新的人机互动界面，其在使用上更直接、更人性化。将触控面板与液晶显示面板整合在一起，形成触控显示面板，能够使液晶显示面板具有触控功能，可通过手指、触控笔等执行输入操作，操作更加直观和简便。
触控显示面板根据感应技术不同可分为电阻式、电容式、光学式、音波式四种，目前主流的触控技术为电容式。触控显示面板根据结构不同可划分为：嵌入式触控显示面板和外挂式触控显示面板。其中，外挂式触控显示面板是将触控面板与液晶显示面板分开生产，然后贴合到一起成为具有触控功能的显示面板，外挂式触控显示面板存在制作成本较高、光透过率较低、模组较厚等缺点。嵌入式触控显示面板是将触控面板功能嵌入到液晶显示面板内，使得液晶显示面板同时具备显示和感知触控输入的功能，相比于外挂式触控显示面板，具有成本较低、厚度较薄等优点，受到各大面板厂家青睐。
进一步地，嵌入式触控显示面板按照触控电路嵌入液晶显示面板中位置的不同又分为：触控电路在液晶盒上型(On Cell)，另一种是触控电路在液晶盒内型(In Cell)。与On Cell触控显示面板相比，In Cell触控显示面板能够实现面板的更轻薄化，为广大手机生产厂商采用，已演化为未来触控技术的主要发展方向。在In cell触控显示面板中，其触控层与液晶显示面板的公共电极(Vcom)层是共用的，具体为将原本整面覆盖的公共电极层分割成阵列排布的多个电极单元，所述多个电极单元分别通过引线电性连接至一触控显示驱动集成电路(Touch and Display Driver Integration，TDDI)，驱动时，将一帧时间划分为一显示阶段和触控感测阶段，在显示阶段，所述触控显示驱动集成电路通过引线向各个电极单元提供公共电压信号(Vcom)进行画面显示，在触控感测阶段所述触控显示驱动集成电路通过引线向各个电极单元提供触控感测信号进行触控感测。
由于各个电极单元与触控显示驱动集成电路的距离不同，造成连接各 个电极单元与触控显示驱动集成电路之间的引线的长度也不同，距离触控显示驱动集成电路近的电极单元需要的引线短，引线的电阻小，距离触控显示驱动集成电路远的电极单元需要的引线长，引线的电阻大，在显示阶段，公共电压信号又是通过引线传输的，各条引线的电阻大小不同，会造成不同电极单元上的公共电压信号不一致，造成显示效果存在差异。
发明内容
本发明的目的在于提供一种触控显示基板，能够减少不同电极单元上的公共电压信号差异，提升显示效果。
本发明的目的还在于提供一种触控显示驱动方法，能够减少不同电极单元上的公共电压信号差异，提升显示效果。
为实现上述目的，本发明提供了一种触控显示基板，包括：基板、在所述基板上依次排列的公共电压补偿电路、电极阵列和触控显示驱动集成电路以及设于所述基板上的第一引线、第二引线及第三引线；
所述电极阵列包括阵列排布的多个电极单元，对应每一个电极单元设置一条第一引线，所述公共电压补偿电路包括分别与所述多个电极单元一一对应的多个开关单元；
每一个电极单元均通过其对应的第一引线与其对应的开关单元的输出端及触控显示驱动集成电路电性连接，所述多个开关单元的输入端均通过所述第二引线与所述触控显示驱动集成电路电性连接；所述多个开关单元的控制端均通过所述第三引线与所述触控显示驱动集成电路电性连接；
所述触控显示驱动集成电路用于在显示阶段，控制所述开关单元导通，并向所述第一引线和第二引线同时加载公共电压信号，在触控感测阶段，控制所述开关单元截止，并向所述第一引线加载触控感测信号。
所述触控显示驱动集成电路包括：与所述第二引线电性连接的第一引脚、分别与所述多条第一引线电性连接的多个第二引脚以及与所述第三引线电性连接的第三引脚。
所述第二引线从所述第一引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的输入端。
所述第三引线从所述第三引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的控制端。
所述触控显示驱动集成电路还包括：与所述第二引线电性连接的第四引脚。
所述第二引线从所述第一引脚引出经由所述电极阵列的一侧电性连接 至各个开关单元的输入端后，接着经由所述电极阵列的另一侧电性连接至第四引脚。
所述触控显示驱动集成电路还包括：与所述第三引线电性连接的第五引脚。
所述第三引线从所述第三引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的控制端后，接着经由所述电极阵列的另一侧电性连接至第五引脚。
所述触控显示基板还包括静电保护电路，所述静电保护电路设于基板上所述公共电压补偿电路远离电极阵列的一侧，所述多条第一引线均电性连接静电保护电路。
本发明还提供一种触控显示驱动方法，应用于上述的触控显示基板，包括如下步骤：
步骤S1、进入显示阶段，所述开关单元导通，所述触控显示驱动集成电路向所述第一引线和第二引线同时加载公共电压信号，并将所述公共电压信号加载至所述电极单元上；
步骤S2、进入触控感测阶段，所述开关单元截止，所述触控显示驱动集成电路向所述第一引线加载触控感测信号，并将所述触控感测信号加载至所述电极单元上。
本发明的有益效果：本发明提供一种触控显示基板，所述触控显示基板包括：基板、在所述基板上依次排列的公共电压补偿电路、电极阵列和触控显示驱动集成电路以及设于所述基板上的第一引线、第二引线及第三引线；所述电极阵列包括阵列排布的多个电极单元，对应每一个电极单元设置一条第一引线，所述公共电压补偿电路包括分别与所述多个电极单元一一对应的多个开关单元；每一个电极单元均通过其对应的第一引线与其对应的开关单元的输出端及触控显示驱动集成电路电性连接，所述多个开关单元的输入端均通过所述第二引线与所述触控显示驱动集成电路电性连接；所述多个开关单元的控制端均通过所述第三引线与所述触控显示驱动集成电路电性连接，在显示阶段，开关单元导通，所述触控显示驱动集成电路向所述第一引线和第二引线同时加载公共电压信号，从而实现双端驱动，能够减少不同电极单元上的公共电压信号差异，提升显示效果。本发明还提供一种触控显示驱动方法，能够减少不同电极单元上的公共电压信号差异，提升显示效果。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的触控显示基板的第一实施例的结构图；
图2为本发明的触控显示基板的第二实施例的结构图；
图3为本发明的触控显示驱动方法的流程图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1和图2所示，本发明提供一种触控显示基板，包括：基板10、在所述基板10上依次排列的公共电压补偿电路40、电极阵列20和触控显示驱动集成电路30以及设于所述基板10上的第一引线50、第二引线60及第三引线70；
所述电极阵列20包括阵列排布的多个电极单元21，对应每一个电极单元21设置一条第一引线50，所述公共电压补偿电路40包括分别与所述多个电极单元21一一对应的多个开关单元41；每一个电极单元21均通过其对应的第一引线50与其对应的开关单元41的输出端及触控显示驱动集成电路30电性连接，所述多个开关单元41的输入端均通过所述第二引线60与所述触控显示驱动集成电路30电性连接；所述多个开关单元41的控制端均通过所述第三引线70与所述触控显示驱动集成电路30电性连接；所述触控显示驱动集成电路30用于在显示阶段，控制所述开关单元41导通，并向所述第一引线50和第二引线60同时加载公共电压信号，在触控感测阶段，控制所述开关单元41截止，并向所述第一引线50加载触控感测信号。
需要说明的是，本发明的触控显示基板用于构成In Cell型触控显示面板，所述In Cell触控显示面板包括本发明的触控显示基板、与所述触控显示基板相对设置的对置基板、以及位于所述触控显示基板及对置基板之间的液晶层。所述对置基板上形成有像素电极及驱动所述像素电极工作的薄膜晶体管，所述像素电极与所述电极单元共同作用，以驱动所述液晶层中的液晶旋转，实现画面显示。
可选地，如图1所示，在本发明的第一实施例中，所述触控显示驱动 集成电路30包括：与所述第二引线60电性连接的第一引脚31、分别与所述多条第一引线50电性连接的多个第二引脚32以及与所述第三引线70电性连接的第三引脚33。
进一步地，所述第二引线60从所述第一引脚31引出经由所述电极阵列20的一侧电性连接至各个开关单元41的输入端。
进一步地，所述第三引线70从所述第三引脚33引出经由所述电极阵列20的一侧电性连接至各个开关单元41的控制端。
可选地，如图2所示，在本发明的第二实施例中，所述触控显示驱动集成电路30包括：与所述第二引线60电性连接的第一引脚31及第四引脚34、分别与所述多条第一引线50电性连接的多个第二引脚32以及与所述第三引线70电性连接的第三引脚33和第五引脚35；
进一步地，在本发明的第二实施例中，所述第二引线60从所述第一引脚31引出经由所述电极阵列20的一侧电性连接至各个开关单元41的输入端后，接着经由所述电极阵列20的另一侧电性连接至第四引脚34。
进一步地，在本发明的第一实施例中，所述第三引线70从所述第三引脚33引出经由所述电极阵列20的一侧电性连接至各个开关单元41的控制端后，接着经由所述电极阵列20的另一侧电性连接至第五引脚35。
在该第二实施例中，所述第二引线60和第三引线70均在所述电极阵列20的两侧同时走线，并通过两个引脚同时提供信号，相比于第一实施例中第二引线60和第三引线70仅在所述电极阵列20的一侧同时走线，能够减少所述第二引线60和第三引线70上阻抗，提升信号传输的准确性。
当然，本发明并不限于上述的两种实施例，在本发明的其他实施例中，还可以根据需要选择第二引线60和第三引线70中的一个在电极阵列20的两侧同时走线，另一个仅在电极阵列20的一侧走线，这些均不会影响本发明的实现。
优选地，所述开关单元41包括第一薄膜晶体管T1，所述第一薄膜晶体管T1的栅极、源极及漏极分别作为所述开关单元41的控制端、输入端及输出端，所述触控显示驱动集成电路30通过所述第三引线70向所述开关单元41提供控制信号，控制所述开关单元41的通断，例如在本发明的第一和第二实施例中所述第一薄膜晶体管T1为N型薄膜晶体管时，所述触控显示驱动集成电路30在显示阶段向所述第一薄膜晶体管T1的栅极提供高电位的控制信号，控制所述第一薄膜晶体管T1打开，在触控感测阶段，向所述第一薄膜晶体管T1的栅极提供低电位的控制信号，控制所述第一薄膜晶体管T1关闭。
具体地，如图1和图2所示，本发明的触控显示基板还包括静电保护电路80，所述静电保护电路80设于基板10上所述公共电压补偿电路40远离电极阵列20的一侧，所述多条第一引线50均电性连接静电保护电路80。
进一步地，如图1和图2所示，所述静电保护电路80用于防止电极单元21被静电击伤，所述静电保护电路80包括多个静电保护单元81，每一个静电保护单元81对应一条第一引线50，每一个静电保护单元81均包括：第二薄膜晶体管T2和第三薄膜晶体管T3，所述第二薄膜晶体管T2为P型薄膜晶体管，第三薄膜晶体管T3为N型薄膜晶体管，所述第二薄膜晶体管T2的源极和栅极均接入一高电压信号H，漏极与所述第三薄膜晶体管T3的漏极及其对应的第一引线50电性连接，所述第三薄膜晶体管T3的源极和栅极均接入一低电压信号L。
需要说明的是，本发明的触控显示基板工作过程包括：在显示阶段，所述触控显示驱动集成电路30通过第三引线70控制各个开关单元41导通，并向所述第一引线50和第二引线60同时加载公共电压信号，所述触控显示驱动集成电路30输入所述第一引线50的公共电压信号直接加载至电极单元21上，加载至所述第二引线60上的公共电压信号经由所述开关单元41输入第一引线50后，也加载至电极单元21上，从而实现从公共电压补偿电路40和触控显示驱动集成电路30向所述电极单元21同时加载公共电压信号，实现公共电压信号的双端驱动，以减少不同电极单元上的公共电压信号差异，提升显示效果；在触控感测阶段，所述触控显示驱动集成电路30通过第三引线70控制各个开关单元41截止，阻止第二引线60上的公共电压信号输入到所述第一引线50上干扰触控感测，同时所述触控显示驱动集成电路30经由第一引线50向各个电极单元21输入触控感测信号进行触控感测。
请参阅图3，基于上述的触控显示基板，本发明还提供一种触控显示驱动方法，应用于上述的触控显示基板，包括如下步骤：
步骤S1、进入显示阶段，所述开关单元41导通，所述触控显示驱动集成电路30向所述第一引线50和第二引线60同时加载公共电压信号，并将所述公共电压信号加载至所述电极单元21上；
步骤S2、进入触控感测阶段，所述开关单元41截止，所述触控显示驱动集成电路30向所述第一引线50加载触控感测信号，并将所述触控感测信号加载至所述电极单元21上。
综上所述，本发明提供一种触控显示基板，所述触控显示基板包括：基板、在所述基板上依次排列的公共电压补偿电路、电极阵列和触控显示 驱动集成电路以及设于所述基板上的第一引线、第二引线及第三引线；所述电极阵列包括阵列排布的多个电极单元，对应每一个电极单元设置一条第一引线，所述公共电压补偿电路包括分别与所述多个电极单元一一对应的多个开关单元；每一个电极单元均通过其对应的第一引线与其对应的开关单元的输出端及触控显示驱动集成电路电性连接，所述多个开关单元的输入端均通过所述第二引线与所述触控显示驱动集成电路电性连接；所述多个开关单元的控制端均通过所述第三引线与所述触控显示驱动集成电路电性连接，在显示阶段，开关单元导通，所述触控显示驱动集成电路向所述第一引线和第二引线同时加载公共电压信号，从而实现双端驱动，能够减少不同电极单元上的公共电压信号差异，提升显示效果。本发明还提供一种触控显示驱动方法，能够减少不同电极单元上的公共电压信号差异，提升显示效果。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

  1. 一种触控显示基板，包括：基板、在所述基板上依次排列的公共电压补偿电路、电极阵列和触控显示驱动集成电路以及设于所述基板上的第一引线、第二引线及第三引线；
    所述电极阵列包括阵列排布的多个电极单元，对应每一个电极单元设置一条第一引线，所述公共电压补偿电路包括分别与所述多个电极单元一一对应的多个开关单元；
    每一个电极单元均通过其对应的第一引线与其对应的开关单元的输出端及触控显示驱动集成电路电性连接，所述多个开关单元的输入端均通过所述第二引线与所述触控显示驱动集成电路电性连接；所述多个开关单元的控制端均通过所述第三引线与所述触控显示驱动集成电路电性连接；
    所述触控显示驱动集成电路用于在显示阶段，控制所述开关单元导通，并向所述第一引线和第二引线同时加载公共电压信号，在触控感测阶段，控制所述开关单元截止，并向所述第一引线加载触控感测信号。
  2. 如权利要求1所述的触控显示基板，其中，所述触控显示驱动集成电路包括：与所述第二引线电性连接的第一引脚、分别与所述多条第一引线电性连接的多个第二引脚以及与所述第三引线电性连接的第三引脚。
  3. 如权利要求2所述的触控显示基板，其中，所述第二引线从所述第一引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的输入端。
  4. 如权利要求2所述的触控显示基板，其中，所述第三引线从所述第三引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的控制端。
  5. 如权利要求2所述的触控显示基板，其中，所述触控显示驱动集成电路还包括：与所述第二引线电性连接的第四引脚。
  6. 如权利要求5所述的触控显示基板，其中，所述第二引线从所述第一引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的输入端后，接着经由所述电极阵列的另一侧电性连接至第四引脚。
  7. 如权利要求2所述的触控显示基板，其中，所述触控显示驱动集成电路还包括：与所述第三引线电性连接的第五引脚。
  8. 如权利要求7所述的触控显示基板，其中，所述第三引线从所述第三引脚引出经由所述电极阵列的一侧电性连接至各个开关单元的控制端后，接着经由所述电极阵列的另一侧电性连接至第五引脚。
  9. 如权利要求1所述的触控显示基板，还包括静电保护电路，所述静 电保护电路设于基板上所述公共电压补偿电路远离电极阵列的一侧，所述多条第一引线均电性连接静电保护电路。
  10. 一种触控显示驱动方法，应用于如权利要求1所述的触控显示基板，包括如下步骤：
    步骤S1、进入显示阶段，所述开关单元导通，所述触控显示驱动集成电路向所述第一引线和第二引线同时加载公共电压信号，并将所述公共电压信号加载至所述电极单元上；
    步骤S2、进入触控感测阶段，所述开关单元截止，所述触控显示驱动集成电路向所述第一引线加载触控感测信号，并将所述触控感测信号加载至所述电极单元上。
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CN105426026A (zh) * 2014-09-10 2016-03-23 乐金显示有限公司 触摸感测装置和使用该触摸感测装置的显示装置
CN104714695A (zh) * 2015-03-31 2015-06-17 京东方科技集团股份有限公司 显示基板及其驱动方法、显示装置

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