WO2014000363A1 - 电容式内嵌触摸屏及显示装置 - Google Patents

电容式内嵌触摸屏及显示装置 Download PDF

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Publication number
WO2014000363A1
WO2014000363A1 PCT/CN2012/084326 CN2012084326W WO2014000363A1 WO 2014000363 A1 WO2014000363 A1 WO 2014000363A1 CN 2012084326 W CN2012084326 W CN 2012084326W WO 2014000363 A1 WO2014000363 A1 WO 2014000363A1
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Prior art keywords
touch
scan line
drive circuit
line
touch scan
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PCT/CN2012/084326
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English (en)
French (fr)
Inventor
赵家阳
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US13/995,327 priority Critical patent/US9513732B2/en
Priority to JP2015518781A priority patent/JP6105725B2/ja
Priority to KR1020137015431A priority patent/KR101546169B1/ko
Priority to EP12852441.0A priority patent/EP2869169B1/en
Publication of WO2014000363A1 publication Critical patent/WO2014000363A1/zh

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Classifications

    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • 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 invention relates to a capacitive in-cell touch screen and a display device. Background technique
  • the Touch Screen Panel With the rapid development of display technology, the Touch Screen Panel has gradually spread throughout people's lives.
  • the touch screen can be divided into: resistive, capacitive, infrared, and surface acoustic wave according to the working principle.
  • the capacitive touch screen is favored by the industry as its new favorite with its unique touch principle and high sensitivity, long life and high light transmittance.
  • a capacitive in-cell touch panel in which a touch electrode is formed in a color filter substrate has appeared, for example: in a conventional TFT (Thin Film Transistor, film) Field effect transistor)
  • the touch sensing function is directly added to the array substrate to realize the touch function, that is, two layers of ITO (Indium Tin Oxides, indium tin metal) intersecting each other on the surface of the TFT array substrate Oxide) electrodes, which are used as touch scan lines and touch sensing lines of the touch screen, respectively, forming an inductive capacitance at the intersection of the opposite faces of the two ITO electrodes.
  • ITO Indium Tin Oxides, indium tin metal
  • the touch precision of the touch screen is usually in the millimeter range, and the display precision of the TFT array substrate is usually on the order of micrometers, it can be seen that the touch scan line and the touch sensing line required for the touch screen are displayed on the TFT array substrate.
  • the required driving lines are much less, and the data lines and gate lines corresponding to each TFT in the TFT array substrate are mutually oppositely intersected, that is, the two lines are insulated from each other and in the vertical direction.
  • the projections intersect, so that a part of the driving lines (data lines and gate lines) in the TFT array substrate can be used as the touch lines (touch scanning lines and touch sensing lines) of the touch screen, and the difference between the data lines and the grid lines
  • the surface of the intersection forms a sensing capacitor to realize the function of the capacitive touch screen.
  • the working process of the above two capacitive in-cell touch screens is: detecting a voltage signal that the touch sensing line is coupled through the sensing capacitor when the touch scanning signal is applied to the ITO electrode as the touch scanning line, in the process, when When the human body touches the touch screen, the human body electric field acts on the sensing capacitor, so that the capacitance value of the sensing capacitor changes, thereby changing the voltage signal coupled by the touch sensing line, and the position of the contact can be determined according to the change of the voltage signal.
  • a high-resolution touch screen needs to be fabricated using a one-chip technology that integrates a gate drive circuit to reduce the board area around the panel, that is, when the gate line is used as the touch scan line, the touch is used.
  • the scan signal also needs to be provided by an integrated gate drive circuit.
  • an integrated gate driving circuit such as a GOA (gate driver on Array) provides a gate driving signal to a gate
  • GOA gate driver on Array
  • one GOA circuit needs at least one displacement register circuit to output a gate driving signal.
  • N gate lines need N displacement register circuits to realize
  • the external clock signal needs to enter the N displacement register circuits at the same time, there will be a signal delay, and the touch scan line is for touch.
  • the real-time requirement of the scanning signal is relatively high. Therefore, using the existing integrated gate driving circuit (such as GOA) to directly provide the touch scanning signal to the touch scanning line may cause a signal delay problem, which may result in the failure to recognize the touch. Control operation. Summary of the invention
  • Embodiments of the present invention provide a capacitive in-cell touch panel and a display device for solving the delay problem when an existing GOA outputs a touch scan signal to a touch scan line.
  • a capacitive in-cell touch screen including: at least one gate line of the TFT array substrate is configured as a touch scan line, wherein the touch screen further includes: The touch control circuit is configured to load a touch scan signal to the touch scan line.
  • Embodiments of the present invention also provide a display device including a capacitive in-cell touch screen in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a capacitive in-cell touch panel according to an embodiment of the invention.
  • FIG. 2 is a schematic structural diagram of a circuit of a GOA according to an embodiment of the present invention.
  • FIG. 3 is a timing chart of driving of a capacitive in-cell touch panel in accordance with an embodiment of the present invention.
  • first”, “second”, and similar terms used in the specification and claims of the present invention are not intended to indicate any order, quantity, or importance, but are merely used to distinguish different components.
  • A, or "a,” and the like do not mean a quantity limitation, but rather indicate that there is at least one.
  • An embodiment of the present invention provides a capacitive in-cell touch panel, as shown in FIG. 1 , wherein a gate line of at least one TFT array substrate is set as a touch scan line (G N in FIG. 1 is set as a touch).
  • the touch screen further includes a touch driving circuit connected to the touch scan line for loading the touch scan signal to the touch scan line.
  • the touch drive circuit is shown in the circuit block at the top of FIG. 1, which is connected to the Clock and (respectively.
  • the touch scan lines required for the touch screen are used to display the required drive lines (data lines and gates) than the TFT array substrate.
  • the line) is much smaller, so the number of touch scan lines set is much smaller than the number of gate lines. Therefore, when the touch function of the gate line as the touch scan line needs to be implemented, the touch scan signal is applied to the gate line by using a separate touch drive circuit, thereby avoiding the occurrence of signal delay.
  • the independent touch driving circuit can be integrated in the IC chip of the driving data line of the TFT array substrate, that is, the touch driving circuit is the source driving circuit of the TFT array substrate, thereby saving circuit traces.
  • the touch drive circuit can also be disposed independently of the TFT display substrate.
  • the capacitive in-cell touch panel further includes: a touch switch disposed between each of the touch scan lines and the touch drive circuit, configured to transmit a touch scan signal when the touch scan line transmits The connection between the touch driving circuit and the touch scan line is turned on; when the touch scan line transmits the gate drive signal, the connection between the touch scan line and the touch drive circuit is closed.
  • the touch switch can be disposed inside the touch driving circuit, or can be disposed at the connection between the touch scanning line and the touch driving circuit.
  • the number of touch switches should be the same as the number of touch sensing lines that are set.
  • one touch switch body may be a TFT.
  • the capacitive in-cell touch panel according to the embodiment of the present invention, as shown in FIG. 1, further includes: an integrated gate driving circuit connected to the touch scan line (such as the circuit box on the left side of the scan line G N in FIG. 1) And a driving switch (not shown in FIG. 1) disposed between each touch scan line and the integrated gate driving circuit; the integrated gate driving circuit for loading the gate of the touch scan line
  • the driving switch is configured to close the connection between the integrated gate driving circuit and the touch scan line when the touch scan signal is transmitted through the touch scan line; when the touch scan line transmits the gate drive signal, the touch switch Control the connection of the scan line to the integrated gate drive circuit.
  • the drive switch may be disposed inside the integrated gate drive circuit or at the junction of the touch scan line and the integrated gate drive circuit.
  • the number of driving switches should be the same as the number of touch scanning lines provided.
  • one driving switch can be a TFT.
  • the gate driving circuit may be a GOA (gate driver on Array).
  • the driving switches are respectively connected to the pull-up node Pullu of the GOA and the pull-down node Pull down.
  • Figure 2 shows a schematic diagram of the circuit after adding a drive switch to the GOA circuit.
  • the original GOA circuit is shown as a circuit inside the dotted line.
  • the driving switch comprises two TFTs (T1 and T2), the sources of T1 and T2 are respectively connected to the common ground VSS end of the GOA, and the drain is respectively connected with the pull-up node Pull u and the pull-down node Pull down of the GOA, the gate Connected to each other.
  • the GOA has a switching function that uses EN t when the GOA is disconnected from the gate line.
  • Ueh controls the discharge of T1 and T2, and pulls the voltage of the output terminal of GOA low to keep the output signal of the GOA circuit low, and achieve the purpose of stopping the GOA output signal.
  • the GOA connected to the line Since the output end of the GOA connected to the current row gate line is connected to the input end of the GOA of the next row of gate lines, a signal is input thereto, so that the current row gate line as the touch scan line is connected to the touch
  • the GOA connected to the line also stops the GOA input signal of the next line of gate lines. Therefore, in addition to inputting a signal to the touch scan line connected thereto, the touch drive circuit is also used to load the touch scan signal to the touch scan line and to the touch scan line (current line).
  • the input terminal (input) of the GOA connected to the next row of gate lines inputs signals to ensure the normal operation of the next row of gate lines.
  • the capacitive in-cell touch screen provided by the embodiment of the present invention is specifically described below by using an example.
  • the gate line of the Nth row is the touch scan line, and the circuit diagram of the GOA connected thereto is shown in FIG. 2.
  • the driving waveform of the touch screen is as shown in FIG. 3, wherein CLK and CLKB are driving clock signals of the GOA, and when the touch scanning signal is transmitted, the driving clock signal is kept high or low, Reduce signal noise.
  • the GOA connected to the touch scan line G N passes through EN t .
  • Ueh controls the discharge of T1 and T2 such that the output of the GOA to the touch scan line G N is low, that is, the GOA stops outputting an electrical signal to the touch scan line.
  • the touch driving circuit is connected to the touch scan line G N , and the touch scan signal is input thereto.
  • the touch scan signal can be divided into a reset phase (reset, as shown by RST in FIG. 3), a touch scan phase (touch scan, as shown by Touch in FIG. 3), and a display scan.
  • the display scan (shown in Figure 3) has three parts, wherein the function of the reset phase is to reset the gate line of the N-1th row and discharge the pixel voltage of the touch line of the Nth row.
  • the touch scan phase is a stage in which the touch scan signal is loaded on the Nth touch scan line, and the data corresponding to the touch sense line is corresponding thereto.
  • the (data) line receives the voltage signal of the touch scan signal, that is, the voltage signal of the touch scan signal is coupled through the formed sensing capacitor; the display scan phase is the touch scan line of the Nth line after the touch scan phase is completed. The pixel is charged, and the corresponding touch sensing line transmits a normal gate driving signal to end the touch sensing.
  • an embodiment of the present invention further provides a display device including a capacitive in-cell touch screen provided by an embodiment of the present invention.
  • the embodiment of the present invention provides a capacitive in-cell touch panel and a display device, wherein a gate line of at least one TFT array substrate is configured as a touch scan line, and the touch screen and the display device further include a touch scan line.
  • the touch driving circuit is configured to load a touch scan signal to the touch scan line.

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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)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract

本发明公开了一种电容式内嵌触摸屏及显示装置，包括至少一条 TFT阵列基板的栅线被设置为触控扫描线，以及与触控扫描线连接的触控驱动电路，用于向触控扫描线加载触控扫描信号。相对于使用现有的 GOA对小尺寸触摸屏的触控扫描线提供触控扫描信号，使用单独的触控驱动电路对作为触控扫描线的栅线提供触控扫描信号，能够避免信号时延问题。

Description

电容式内嵌触摸屏及显示装置 技术领域
本发明涉及一种电容式内嵌触摸屏及显示装置。 背景技术
随着显示技术的飞速发展， 触摸屏 ( Touch Screen Panel ) 已经逐渐遍及 人们的生活中。 目前， 触摸屏按照工作原理可以分为： 电阻式、 电容式、 红 外线式以及表面声波式。 其中， 电容式触摸屏以其独特的触控原理， 凭借高 灵敏度、 长寿命、 高透光率等优点， 被业内追捧为新宠。
目前， 为了使电容式触摸屏具有更薄的面板， 已经出现将触控电极制作 在彩膜基板之内的电容式内嵌（in cell )触摸屏， 例如： 在现有的 TFT ( Thin Film Transistor, 薄膜场效应晶体管） 阵列基板上直接另外增加触控扫描线和 触控感应线实现触控功能， 即在 TFT阵列基板的表面制作两层相互异面相交 的条状 ITO ( Indium Tin Oxides, 铟锡金属氧化物 ) 电极， 这两层 ITO电极分 别作为触摸屏的触控扫描线和触控感应线， 在两条 ITO电极的异面相交处形 成感应电容。
又如： 由于触摸屏的触控精度通常在毫米级， 而 TFT阵列基板的显示精 度通常在微米级， 可以看出， 触控屏所需的触控扫描线和触控感应线比 TFT 阵列基板显示所需的驱动线（数据线和栅线）要少的多， 并且， TFT 阵列基 板中每个 TFT对应的数据线和栅线都异面相交， 即两条线相互绝缘且在垂直 方向上的投影相交， 因此， 可以将 TFT阵列基板中的一部分驱动线（数据线 和栅线）作为触摸屏的触控线（触控扫描线和触控感应线）， 并且， 在数据线 和栅线的异面相交处形成感应电容， 以实现电容式触摸屏的功能。
上述两种电容式内嵌触摸屏的工作过程为： 在对作为触控扫描线的 ITO 电极加载触控扫描信号时，检测触控感应线通过感应电容耦合出的电压信号 , 在此过程中， 当人体接触触摸屏时， 人体电场就会作用在感应电容上， 使感 应电容的电容值发生变化， 进而改变触控感应线耦合出的电压信号， 根据电 压信号的变化， 就可以确定触点位置。 而具有高分辨率的触摸屏需要使用一体成型 （one chip )技术制备， 其集 成了栅极驱动电路， 以减少面板周边电路板面积， 即在使用栅线作为触控扫 描线的情况下， 触控扫描信号也需要由集成的栅极驱动电路提供。 诸如 GOA ( Gate Driver on Array, 阵列基板行驱动电路）的集成的栅极驱动电路在向栅 极提供栅极驱动信号时，一般一个 GOA电路输出一个栅极驱动信号就需要至 少一个位移寄存电路来实现，故 N条栅线就需要 N个位移寄存电路才能实现， 外部时钟信号需要同时进入到这 N个位移寄存电路中会出现信号延时（ delay ) 的问题， 而触控扫描线对于触控扫描信号的实时性要求比较高， 因此， 使用 现有的集成的栅极驱动电路（例如 GOA )直接对触控扫描线提供触控扫描信 号会出现信号延时的问题， 导致不能正常识别出触控操作。 发明内容
本发明的实施例提供了一种电容式内嵌触摸屏及显示装置， 用以解决现 有的 GOA对触控扫描线输出触控扫描信号时的延时问题。
根据本发明的一个实施例， 提供了一种电容式内嵌触摸屏， 包括： TFT 阵列基板的至少一条栅线被设置为触控扫描线， 其中， 该触摸屏还包括： 与 所述触控扫描线连接的触控驱动电路， 用于向所述触控扫描线加载触控扫描 信号。
本发明的实施例还提供了一种显示装置， 其包括根据本发明实施例的电 容式内嵌触摸屏。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 简单地介绍， 显而易见地， 下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为根据本发明实施例的电容式内嵌触摸屏的结构示意图；
图 2为根据本发明实施例的 GOA的电路结构示意图；
图 3为根据本发明实施例的电容式内嵌触摸屏的驱动时序图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图， 对本发明实施例的技术方案进行清楚、 完整地描述。 显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。 除非另作定义， 此处使用 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。 本发明专利申请说明书以及权利要求书中使用的"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。 同样， "一个，，或者"一，，等类似词语也不表示数量限制， 而是表 示存在至少一个。
附图中各层薄膜厚度和区域大小形状不反映阵列基板的真实比例， 目的 只是示意性地说明本发明公开的技术内容。
本发明的实施例提供了一种电容式内嵌触摸屏， 如图 1 所示， 其中， 至 少一条 TFT阵列基板的栅线被设置为触控扫描线（图 1 中 GN表示被设置为 触控扫描线的栅线）， 该触摸屏还包括与触控扫描线连接的触控驱动电路， 用 于向触控扫描线加载触控扫描信号。 该触控驱动电路如位于图 1 上部的电路 方框所示， 其与 Clock和( 分别连接。
由于触摸屏的触控精度通常在毫米级， 而 TFT阵列基板的显示精度通常 在微米级， 触控屏所需的触控扫描线比 TFT阵列基板用于显示所需的驱动线 (数据线和栅线 )要少的多， 因而设置的触控扫描线的数量也就远远小于栅 线的数量。 因此， 当需要实现作为触控扫描线的栅线的触控功能时， 使用单 独的触控驱动电路对栅线加载触控扫描信号， 可以避免信号时延的出现。
例如， 在具体实施时， 该独立的触控驱动电路可以集成在 TFT阵列基板 的驱动数据线的 IC芯片内部，即触控驱动电路是 TFT阵列基板的源极驱动电 路， 这样可以节省电路走线。 在不同的实施方式中， 也可以独立于 TFT陈列 基板设置所述触控驱动电路。
根据本发明实施例的电容式内嵌触摸屏， 例如， 还包括： 设置在各触控 扫描线与触控驱动电路之间的触控开关， 用于在触控扫描线传递触控扫描信 号时， 开启触控驱动电路与触控扫描线的连接； 在触控扫描线传递栅极驱动 信号时， 关闭触控扫描线与触控驱动电路的连接。 例如， 触控开关可以设置在触控驱动电路的内部， 也可以设置在触控扫 描线与触控驱动电路的连接处。
在具体实施时， 触控开关的数量应该和设置的触控感应线的数量一致。 当触控开关设置在触控扫描线和触控驱动电路的连接处时， 一个触控开关具 体可以为一个 TFT。
根据本发明实施例的电容式内嵌触摸屏， 如图 1 所示， 还包括： 与触控 扫描线连接的集成的栅极驱动电路（如图 1 中扫描线 GN左侧的电路方框所 示）， 以及设置在各触控扫描线与集成的栅极驱动电路之间的驱动开关（图 1 中未示出）； 该集成的栅极驱动电路， 用于对触控扫描线加载栅极驱动信号； 该驱动开关， 用于在触控扫描线传递触控扫描信号时， 关闭集成的栅极驱动 电路与触控扫描线的连接； 在触控扫描线传递栅极驱动信号时， 开启触控扫 描线与集成的栅极驱动电路的连接。
根据实施方式的不同， 驱动开关可以设置在集成的栅极驱动电路的内部， 也可以设置在触控扫描线与集成的栅极驱动电路的连接处。
在具体实施时， 驱动开关的数量应该与设置的触控扫描线的数量一致， 当驱动开关设置在触控扫描线和集成的栅极驱动电路的连接处时， 一个驱动 开关可以是一个 TFT。
在实施时， 例如， 栅极驱动电路可以是 GOA ( Gate Driver on Array, 阵列基板行驱动电路）。
在本发明的一种实施方式中， 当栅极驱动电路为 GOA时， 驱动开关分别 与 GOA的拉高节点 Pull u 和拉低节点 Pull down连接。 图 2示出了在 GOA 电路中添加驱动开关后的电路示意图。原 GOA电路如虚线框内电路所示。 该 驱动开关包括两个 TFT ( T1和 T2 ), T1和 T2的源极分别与 GOA的公共接 地 VSS端连接， 漏极分别与 GOA的拉高节点 Pull u 和拉低节点 Pull down 连接， 栅极之间相互连接。
添加了驱动开关后， GOA具有开关功能， 即在需要 GOA与栅线断开关 联时，使用 ENt。ueh控制 T1和 T2放电，将 GOA的输出 Output端的电压拉低， 以保持 GOA电路的输出信号为低， 达到停止 GOA输出信号的目的。
由于与当前行栅线连接的 GOA的输出端与下一行栅线的 GOA的输入端 连接， 用于向其输入信号， 这样， 在作为触控扫描线的当前行栅线连接到触 控驱动电路时，与该行连接的 GOA也会停止向下一行栅线的 GOA输入信号。 因此， 触控驱动电路除了向与其连接的触控扫描线输入信号之外， 还用于当 向触控扫描线加载触控扫描信号时， 向与该触控扫描线（当前行栅线） 的下 一行栅线连接的 GOA的 Input端 （输入端 )输入信号， 以保证下一行栅线的 正常工作。
下面以一个实例具体说明本发明实施例提供的电容式内嵌触摸屏。 例如， 以第 N行的栅线为触控扫描线， 与其连接的 GOA的电路图如图 2所示。 该 触摸屏的驱动波形如图 3所示， 其中， CLK和 CLKB是 GOA的驱动时钟信 号， 在触控扫描线 ( 传递触控扫描信号时， 驱动时钟信号会保持高或低电平 不变， 以减小信号噪声。
当第 N-1行的栅线 GN_i完成栅极驱动信号的传输后， 与触控扫描线 GN 连接的 GOA会通过 ENt。ueh控制 T1和 T2放电， 使得该 GOA对触控扫描线 GN的输出为低电平， 即该 GOA停止对触控扫描线输出电信号。 这时， 触控 驱动电路与触控扫描线 GN连接， 向其输入触控扫描信号。
例如， 在一帧的扫描时间中， 触控扫描信号可以分为复位阶段（reset, 如图 3中 RST所示）， 触控扫描阶段 ( touch scan, 如图 3中 Touch所示）和 显示扫描阶段 ( display scan, 如图 3中 Display所示）三个部分， 其中， Reset 阶段的功能是对第 N-1行的栅线进行复位以及对第 N行触控扫描线的像素电 压进行放电， 以避免误充电和像素电压影响触控扫描信号； 触控扫描阶段则 是这样的阶段， 在其中， 对第 N行触控扫描线加载触控扫描信号， 与其对应 的作为触控感应线的数据（data )线接收触控扫描信号的电压信号， 即通过形 成的感应电容耦合所述触控扫描信号的电压信号； 显示扫描阶段则是在触控 扫描阶段完成之后对第 N行触控扫描线进行像素充电， 这时对应的触控感应 线传递正常的栅极驱动信号， 结束触控感应。
基于同一发明构思， 本发明的实施例还提供了一种显示装置， 其包括本 发明实施例提供的电容式内嵌触摸屏。
本发明的实施例提供了一种电容式内嵌触摸屏及显示装置， 其中， 至少 一条 TFT阵列基板的栅线被设置为触控扫描线， 该触摸屏及显示装置还包括 与触控扫描线连接的触控驱动电路， 用于向触控扫描线加载触控扫描信号。 相对于现有技术中使用现有的 GOA对小尺寸触摸屏的触控扫描线提供触控 扫描信号， 本发明公开的技术使用单独的触控驱动电路对作为触控扫描线的 栅线提供触控扫描信号。 由于触控扫描线相对于栅线的数量要少得多， 触控 驱动电路需要提供的触控扫描信号的数量相对栅极驱动电路也要少得多， 因 此本发明公开的技术能够避免信号时延问题。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种电容式内嵌触摸屏， 包括： TFT阵列基板的至少一条栅线被设置 为触控扫描线， 其中， 还包括：
与所述触控扫描线连接的触控驱动电路， 用于向所述触控扫描线加载触 控扫描信号。
2、如权利要求 1所述的触摸屏， 其中， 所述触控驱动电路是所述 TFT阵 列基板的源极驱动电路。
3、 如权利要求 1或 2所述的触摸屏， 其中， 还包括： 设置在所述触控扫 描线与所述触控驱动电路之间的触控开关， 用于在所述触控扫描线传递触控 扫描信号时， 开启所述触控驱动电路与所述触控扫描线的连接； 在所述触控 扫描线传递栅极驱动信号时， 关闭所述触控扫描线与所述触控驱动电路的连 接。
4、 如权利要求 3所述的触摸屏， 其中， 所述触控开关设置于所述触控驱 动电路的内部， 或设置于所述触控扫描线与所述触控驱动电路的连接处。
5、 如权利要求 1-4中任一项所述的触摸屏， 其中， 还包括： 与所述触控 扫描线连接的集成的栅极驱动电路， 以及设置在所述触控扫描线与所述集成 的栅极驱动电路之间的驱动开关；
所述集成的栅极驱动电路， 用于对所述触控扫描线加载栅极驱动信号； 所述驱动开关， 用于在所述触控扫描线传递触控扫描信号时， 关闭所述 集成的栅极驱动电路与所述触控扫描线的连接； 在所述触控扫描线传递栅极 驱动信号时， 开启所述触控扫描线与所述集成的栅极驱动电路的连接。
6、 如权利要求 5所述的触摸屏， 其中， 所述驱动开关设置于所述集成的 栅极驱动电路的内部， 或设置于所述触控扫描线与所述集成的栅极驱动电路 的连接处。
7、 如权利要求 5或 6所述的触摸屏， 其中， 所述集成的栅极驱动电路是 阵列基板行驱动电路。
8、 如权利要求 7所述的触摸屏， 其中， 所述驱动开关分别与所述阵列基 板行驱动电路的拉高节点 Pull u 和拉低节点 Pull down连接。
9、 如权利要求 8所述的触摸屏， 其中， 所述驱动开关包括： 两个 TFT, 所述两个 TFT的源极分别与所述阵列基板行驱动电路的公共接地 VSS端连 接， 漏极分别与所述阵列基板行驱动电路的拉高节点 Pull up和拉低节点 Pull down连接， 栅极之间相互连接。
10、如权利要求 7-9中任一项所述的触摸屏， 其中， 所述触控驱动电路还 用于在向所述触控扫描线加载触控扫描信号时， 向与所述触控扫描线的下一 行栅线连接的阵列基板行驱动电路的 Input端输入信号。
11、 一种显示装置， 其中， 包括如权利要求 1-10中任一项所述的电容式 内嵌触摸屏。
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