WO2017088231A1 - 触控面板及其驱动方法、触控显示器 - Google Patents

触控面板及其驱动方法、触控显示器 Download PDF

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Publication number
WO2017088231A1
WO2017088231A1 PCT/CN2015/098775 CN2015098775W WO2017088231A1 WO 2017088231 A1 WO2017088231 A1 WO 2017088231A1 CN 2015098775 W CN2015098775 W CN 2015098775W WO 2017088231 A1 WO2017088231 A1 WO 2017088231A1
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Prior art keywords
thin film
film transistor
touch
gate
voltage
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PCT/CN2015/098775
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English (en)
French (fr)
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谢剑星
蔡育徵
黄俊宏
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深圳市华星光电技术有限公司
武汉华星光电技术有限公司
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Priority to US14/905,871 priority Critical patent/US10372256B2/en
Publication of WO2017088231A1 publication Critical patent/WO2017088231A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3262—Power saving in digitizer or tablet
    • 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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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

Definitions

  • the present invention relates to the field of touch display technology, and in particular to a touch panel, a driving method thereof, and a touch display.
  • capacitive touch screens have been widely used in various electronic products such as mobile phones and tablet computers.
  • the more common capacitive touch screens are OGS (One Glass Solution), On-Cell (in-line) and In-Cell (in-line).
  • OGS One Glass Solution
  • On-Cell in-line
  • In-Cell in-line
  • In-Cell technology has the advantages of lighter weight, better light transmission and more stable structure than OGS technology and On-Cell technology due to its manufacturing process advantages.
  • the control terminal of the switching element (such as a thin film transistor TFT) is turned on due to the application of the touch scanning voltage, thereby causing pixel leakage.
  • the occurrence of a phenomenon which in turn affects the display effect.
  • an object of the present invention is to provide a driving method of a touch display, including a gate line and a data line disposed at a crossover, and a gate line and a switching element connecting the gate line and the data line at an intersection of the data lines, wherein, in a touch scanning phase, when a touch scanning voltage is applied, being applied to the gate line
  • the gate-off voltage oscillates following the touch scan voltage at the same amplitude and frequency to prevent the switching element from being turned on during the touch scanning phase.
  • Another object of the present invention is to provide a touch panel including gate lines and data lines disposed at intersections, and at intersections of the gate lines and the data lines and connecting the gate lines And a switching element of the data line, wherein, during the touch scanning phase, when the touch scanning voltage is applied, A gate-off voltage applied to the gate line oscillates with the touch scan voltage at the same amplitude and frequency to prevent the switching element from being turned on during the touch scanning phase.
  • the data voltage applied to the data line oscillates with the touch scan voltage at the same amplitude and frequency to reduce the data.
  • the coupling capacitance between the line and the common electrode as the touch electrode is reduced.
  • the switching element is a thin film transistor, a gate of the thin film transistor is connected to the gate line, a source of the thin film transistor is connected to the data line, and a drain of the thin film transistor is connected to a pixel electrode.
  • the thin film transistor is a PMOS thin film transistor or an NMOS thin film transistor or a CMOS thin film transistor.
  • Still another object of the present invention is to provide a touch display having the above touch panel.
  • the present invention oscillates by following the touch scan voltage with the same amplitude and frequency in the touch scanning phase, thereby preventing the control terminal of the switching element from being turned on, thereby preventing leakage of the pixel current. , improve the display.
  • FIG. 1 shows a block diagram of a touch panel in accordance with an embodiment of the present invention
  • FIG. 2 is a circuit diagram showing pixels in the touch panel shown in FIG. 1;
  • FIG. 3 is a waveform diagram of a gate voltage, a data voltage, and a touch scan voltage according to an embodiment of the present invention
  • Vgs gate-to-source voltage
  • Id drain current
  • FIG. 1 shows a block diagram of a touch panel in accordance with an embodiment of the present invention.
  • FIG. 2 shows a circuit diagram of a pixel in the touch panel shown in FIG. 1.
  • the touch panel is described by taking a liquid crystal display panel as an example, but the present invention is not limited thereto.
  • a touch panel includes: a liquid crystal panel assembly 300; a gate driver 400 and a data driver 500, both of which are connected to the liquid crystal panel assembly 300; a gray voltage generator 800 connected to the data The driver 500; and a signal controller (or timing controller) 600 for controlling the liquid crystal panel assembly 300, the gate driver 400, the data driver 500, and the gray voltage generator 800.
  • the liquid crystal panel assembly 300 includes a plurality of display signal lines and a plurality of pixels PX connected to the display signal lines and arranged in an array.
  • the liquid crystal panel assembly 300 may include a lower display panel (not shown) and an upper display panel (not shown) facing each other, and a liquid crystal layer (not shown) interposed between the lower display panel and the upper display panel.
  • a display signal line can be arranged on the lower display panel.
  • the display signal lines may include a plurality of gate lines transmitting gate signals to as G 1 in a plurality of data lines D G n and data transmission signals 1 to D m.
  • Gate lines G 1 through G n extend in a row direction and are parallel to each other, while the data lines D 1 to D m extend in the column direction and parallel to each other.
  • Each of the pixels PX includes: a switching device connected to a corresponding gate line and a corresponding data line; and a liquid crystal capacitor connected to the switching device.
  • Each pixel PX may also include a storage capacitor, which is connected in parallel with the liquid crystal capacitor, if necessary.
  • the switching device of each pixel PX is a three-terminal device, thus having a control terminal connected to the corresponding gate line, an input terminal connected to the corresponding data line, and an output terminal connected to the corresponding liquid crystal capacitor.
  • the gate driver 400 is connected to the gate lines G 1 to G n and applies a gate voltage to the gate lines G 1 to G n , which is a gate-on voltage applied to the gate driver 400 by an external source A combination of Vg1 and a gate-off voltage Vg2.
  • the gate driver 400 is arranged on one side of the liquid crystal panel assembly 300, and the gate lines G 1 to G n are connected to the gate driver 400.
  • the invention is not limited thereto. That is, both sides of the liquid crystal panel assembly 300 and are arranged to provide two gate driver and the gate lines G 1 to G n are connected to the two gate drivers in each.
  • a gate driver may be connected to one end of the gate lines G 1 to G n and the other of the gate driver may be connected to the other end of the gate lines G 1 to G n of.
  • the gate driver 400 may be embedded in the liquid crystal panel assembly 300 as an integrated circuit having at least one thin film transistor (TFT).
  • the gray voltage generator 800 generates a gray voltage that is closely related to the transmittance of the pixel PX. This gray voltage is supplied to each pixel PX and has a positive value or a negative value according to the common voltage Vcom.
  • the data driver 500 is connected to the data lines D 1 to D m of the liquid crystal panel assembly 300, and applies the gray voltage generated by the gray voltage generator 800 to the pixel PX as a data voltage. If the gray voltage generator 800 does not supply all of the gray voltages but only the reference gray voltages, the data driver 500 can generate various gray voltages by dividing the reference gray voltages, and select various gray scales. One of the voltages acts as a data voltage.
  • the gate driver 400 or the data driver 500 may signal lines (gate lines G 1 through G n and data lines D 1 to D m) and the TFT integrated together with the display on the liquid crystal panel assembly 300.
  • the gate driver 400 or the data driver 500 may be mounted on a flexible printed circuit film (not shown) and then attached to the liquid crystal panel assembly 300 as a Tape Carrier Package (TCP).
  • TCP Tape Carrier Package
  • Signal controller 600 controls the operation of gate driver 400 and data driver 500.
  • the signal controller 600 receives input image signals (R, G, and B) and a plurality of input control signals for controlling display of the input image signals, such as a vertical sync signal Vsync, a horizontal sync signal, from an external graphics controller (not shown). Hsync, main clock signal MCLK, data enable signal DE.
  • the signal controller 600 appropriately processes the input image signals (R, G, and B) in accordance with the input control signals, thereby generating image data DAT that conforms to the operating conditions of the liquid crystal panel assembly 300. Then, the signal controller 600 generates the gate control signal CONT1 and the data control signal CONT2, transfers the gate control signal CONT1 to the gate driver 400, and transfers the data control signal CONT2 and the image data DAT to the data driver 500.
  • the gate control signal CONT1 may include a scan start signal STV for initiating an operation of the gate driver 400, that is, a scan operation, and at least one clock signal for controlling when the gate-on voltage Vg1 is output.
  • the gate control signal CONT1 may also include an output enable signal OE for limiting the duration of the gate-on voltage Vg1.
  • the clock signal can be used as the selection signal SE.
  • the data control signal CONT2 may include: a horizontal synchronization start signal STH, a transmission indicating that the image data DAT; a load signal LOAD, which request data voltage is applied to the image data DAT corresponding to the data lines D 1 to D m; and a data clock signal HCLK .
  • the data control signal CONT2 may also include an inversion signal RVS for inverting the polarity of the data voltage with respect to the common voltage Vcom, which is hereinafter referred to as "polarity of the data voltage.”
  • the data driver 500 receives the image data DAT from the signal controller 600 in response to the data control signal CONT2, and selects the image data by selecting the gray voltage corresponding to the image data DAT from among the plurality of gray voltages supplied from the gray voltage generator 800. Convert to data voltage. Then, the data driver 500 applies a data voltage to the data lines D 1 to D m .
  • the gate driver 400 applies the gate-on voltage Vg1 in response to the gate control signals CONT1 to the gate lines G 1 to G n and the switching device is turned on is connected to the gate lines G1 to Gn. Then, the data voltages applied to the data lines D 1 to D m are transmitted to each of the pixels PX through the turned-on switching devices.
  • the difference between the data voltage applied to each pixel PX and the common voltage Vcom can be interpreted as a voltage with which the liquid crystal capacitor of each pixel PX is charged, that is, a pixel voltage.
  • the arrangement of the liquid crystal molecules in the liquid crystal layer varies depending on the amplitude of the pixel voltage, and thus the polarity of the light transmitted through the liquid crystal layer can also be changed, resulting in a change in the transmittance of the liquid crystal layer.
  • each of the pixels PX includes a switching device T, a liquid crystal capacitor Clc, and a storage capacitor Cst.
  • the switching device T is arranged at the intersection between the i-th (1 ⁇ i ⁇ n) gate line GL i and the j-th (1 ⁇ i ⁇ m) data line DL j .
  • the switching device T may be a thin film transistor (TFT).
  • the switching device T includes a control terminal connected to the ith gate line GL i , an input terminal connected to the jth data line DL j , and an output terminal connected to the liquid crystal capacitor Clc and the storage capacitor Cst.
  • Each of the pixels PX includes a pixel electrode (not shown) that is connected to an output terminal of the switching element T.
  • a common electrode is provided on the lower display panel facing the upper display panel.
  • the touch display screen according to the embodiment of the present invention adopts display and touch time-sharing scanning: when displaying an image (ie, display stage), the common electrode provides a common voltage for the corresponding pixel PX; in the touch scanning (ie, the touch stage)
  • the common electrode can be used as a drive electrode for generating a drive signal.
  • the liquid crystal capacitor Clc includes a pixel electrode connected to the switching element T, a common electrode, and a liquid crystal interposed therebetween.
  • the storage capacitor Cst includes a pixel electrode, a common electrode, and an insulator therebetween. The storage capacitor Cst maintains the pixel voltage charged in the liquid crystal capacitor Clc.
  • the common voltage Vcom is applied to the common electrode.
  • the control terminal of the switching element T When the gate-on voltage Vg1 is applied to the i-th gate line GL i , the control terminal of the switching element T is turned on, and the data voltage is input to the pixel electrode in the pixel of the ith row through the input terminal of the switching element T. That is, the data voltage is charged in the liquid crystal capacitor Clc connected to the i-th gate line GL i .
  • the data voltage charged in the liquid crystal capacitor Clc is referred to as a pixel voltage.
  • the control terminal of the switching element T is turned off, and the pixel electrode in the pixel of the i-th row is electrically disconnected. That is, after the data voltage is applied to the pixel electrode, the pixel electrode is maintained in a floating state, that is, the pixel potential is raised and held.
  • a touch scan signal is applied to the common electrode.
  • the gate-off voltage Vg2 applied to the ith gate line GL i is oscillated with the same amplitude value following the touch scan voltage TP to avoid the switching element T.
  • the console is turned on during the touch scan phase.
  • the data voltage can also be oscillated by the same amplitude value following the touch scan voltage TP, so that the coupling capacitance between the data line and the common electrode as the touch electrode can be reduced during the touch scanning phase, and It has an effect on the gate-source voltage Vgs.
  • the control terminal of the switching element T can be prevented from being turned on during the touch scanning phase.
  • the PMOS-TFT is described as an example, but the present invention is not limited thereto, and for example, an NMOS-TFT or a CMOS-TFT may be used.
  • 3 is a waveform diagram of a gate voltage, a data voltage, and a touch scan voltage, in accordance with an embodiment of the present invention.
  • 4 is a graph of gate-source voltage Vgs versus drain current Id in accordance with an embodiment of the present invention. line graph.
  • the gate voltage is a low voltage, that is, when the gate-on voltage Vg1 is -10 V
  • the gate-on voltage Vg1 is applied to the i-th gate line GL i
  • the switching element T is controlled.
  • the terminal is turned on
  • the data voltage 5V is input to the pixel electrode in the pixel of the i-th row through the input terminal of the switching element T. That is, the data voltage 5V is charged in the liquid crystal capacitor Clc connected to the i-th gate line GL i .
  • the touch scan voltage TP is applied to the common electrode, wherein the amplitude of the touch scan voltage TP is 4.3V, and the pixel potential Vpixel is raised and maintained at 9.5V;
  • the gate-off voltage is oscillated by following the touch scan voltage with the same amplitude value to prevent the control terminal of the switching element from being turned on during the touch scanning phase.

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  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

一种触控面板的驱动方法以及利用该驱动方法进行驱动显示的触控面板、触控显示器，所述触控面板包括交叉设置的栅极线（Gi, GLi, 1≤i≤n）和数据线（Dj, DLj, 1≤j≤m），以及设置于所述栅极线（Gi, GLi, 1≤i≤n）和所述数据线（Dj, DLj, 1≤j≤m）的交叉处且连接所述栅极线（Gi, GLi, 1≤i≤n）和所述数据线（Dj, DLj, 1≤j≤m）的开关元件（T），其中，在触控扫描阶段，当触控扫描电压（TP）被施加时，被施加到所述栅极线（Gi, GLi, 1≤i≤n）上的栅截止电压（Vg2）以相同的振幅和频率跟随所述触控扫描电压（TP）进行振荡，以防止所述开关元件（T）在触控扫描阶段被打开，进而防止了像素电流的漏电，提高显示效果。

Description

触控面板及其驱动方法、触控显示器 技术领域
本发明属于触控显示技术领域，具体地讲，涉及一种触控面板及其驱动方法、触控显示器。
背景技术
随着智能电子产品的普及，电容式触控屏已经被广泛的应用于手机、平板电脑等各种电子产品中。目前，较为常见的电容式触控屏有OGS(One Glass Solution，即一体化触控)、On-Cell(外挂式)和In-Cell(内嵌式)三种技术。其中，In-Cell技术由于其制作工艺上的优势，相比OGS技术和On-Cell技术，具有更加轻薄、透光性更好、结构更加稳定等优点。
然而，在采用In-Cell技术的电容式触控屏中，在触控扫描阶段，由于触控扫描电压的施加，会导致开关元件(例如薄膜晶体管TFT)的控制端被打开，从而造成像素漏电现象的发生，进而影响显示效果。
因此，现有技术有待改进和发展。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种触控显示器的驱动方法，所述触控显示器包括交叉设置的栅极线和数据线、以及设置于所述栅极线和所述数据线的交叉处且连接所述栅极线和所述数据线的开关元件，其中，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述栅极线上的栅截止电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以防止所述开关元件在触控扫描阶段被打开。
本发明的另一目的还在于提供一种触控面板，其包括交叉设置的栅极线和数据线、以及设置于所述栅极线和所述数据线的交叉处且连接所述栅极线和所述数据线的开关元件，其中，在触控扫描阶段，当触控扫描电压被施加时，被 施加到所述栅极线上的栅截止电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以防止所述开关元件在触控扫描阶段被打开。
进一步地，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述数据线上的数据电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以降低所述数据线与作为触控电极的公共电极之间的耦合电容。
进一步地，所述开关元件为薄膜晶体管，所述薄膜晶体管的栅极连接到所述栅极线，所述薄膜晶体管的源极连接到所述数据线，所述薄膜晶体管的漏极连接到像素电极。
进一步地，所述薄膜晶体管为PMOS薄膜晶体管或者NMOS薄膜晶体管或者CMOS薄膜晶体管。
本发明的又一目的又在于提供了一种具有上述触控面板的触控显示器。
本发明的有益效果：本发明通过使栅极截止电压在触控扫描阶段以同样的振幅和频率跟随触控扫描电压进行振荡，从而避免开关元件的控制端被打开，进而防止了像素电流的漏电，提高显示效果。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1示出了根据本发明的实施例的触控面板的框图；
图2示出了图1中所示的触控面板中的像素的电路图；
图3是根据本发明的实施例的栅极电压、数据电压及触控扫描电压的波形图；
图4是根据本发明的实施例的栅极-源极电压Vgs与漏极电流Id的关系曲线图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的 形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图1示出了根据本发明的实施例的触控面板的框图。图2示出了图1中所示的触控面板中的像素的电路图。在实施例中，以液晶显示面板为例对触控面板进行说明，但本发明并不限制于此。
参照图1，根据本发明的实施例的触控面板包括：液晶面板组件300；栅极驱动器400和数据驱动器500，二者都连接到液晶面板组件300；灰度电压产生器800，连接到数据驱动器500；以及信号控制器(或称时序控制器)600，用于控制液晶面板组件300、栅极驱动器400、数据驱动器500和灰度电压产生器800。
液晶面板组件300包括多条显示信号线和连接到显示信号线并按阵列排列的多个像素PX。液晶面板组件300可以包括：彼此面对的下显示面板(未示出)和上显示面板(未示出)，以及被插入在下显示面板和上显示面板之间的液晶层(未示出)。
可以在下显示面板上布置显示信号线。显示信号线可以包括传送栅极信号的多条栅极线G1至Gn和传送数据信号的多条数据线D1至Dm。栅极线G1至Gn按行方向延伸并且彼此平行，而数据线D1至Dm按列方向延伸并且彼此平行。
每个像素PX包括：开关器件，连接到相应的栅极线和相应的数据线；以及液晶电容器，连接到该开关器件。如果必要，每个像素PX也可以包括存储电容器，其与液晶电容器并联连接。
每个像素PX的开关器件是三端器件，因此具有连接到相应栅极线的控制端、连接到相应数据线的输入端和连接到相应液晶电容器的输出端。
栅极驱动器400连接到栅极线G1至Gn，并向栅极线G1至Gn施加栅极电压，该栅极电压是由外部源施加到栅极驱动器400的栅极导通电压Vg1和栅极截止电压Vg2的组合。参照图1，在液晶面板组件300的一侧布置栅极驱动器 400，并且栅极线G1至Gn都连接到该栅极驱动器400。然而，本发明不限于此。也就是说，可以在液晶面板组件300的两侧提供和布置两个栅极驱动器，并且栅极线G1至Gn都连接到两个栅极驱动器的每一个。例如，在大尺寸LCD的情况下，很难仅通过使用一个栅极驱动器就将栅极导通电压Vg1和栅极截止电压Vg2从栅极线G1至Gn的一端传送到另一端。为了解决这个问题，可以提供两个栅极驱动器。一个栅极驱动器可以连接到栅极线G1至Gn的一端，而另一个栅极驱动器可以连接到栅极线G1至Gn的另一端。栅极驱动器400可以被嵌入在液晶面板组件300中作为具有至少一个薄膜晶体管(TFT)的集成电路。
灰度电压产生器800产生与像素PX的透射率紧密相关的灰度电压。该灰度电压被提供给每个像素PX，并且根据公共电压Vcom而具有正值或负值。
数据驱动器500连接到液晶面板组件300的数据线D1至Dm，并向像素PX施加由灰度电压产生器800产生的灰度电压作为数据电压。如果灰度电压产生器800不是提供所有的灰度电压而是仅提供基准灰度电压，则数据驱动器500可以通过将基准灰度电压分压而产生各种灰度电压，并选择各种灰度电压中的一个作为数据电压。
栅极驱动器400或数据驱动器500可以与显示信号线(栅极线G1至Gn和数据线D1至Dm)和TFT一起被集成在液晶面板组件300上。可替换地，栅极驱动器400或数据驱动器500可以被安装在柔性印刷电路薄膜(未示出)上，然后附接到液晶面板组件300作为带载封装(Tape Carrier Package，简称TCP)。
信号控制器600控制栅极驱动器400和数据驱动器500的操作。
信号控制器600从外部图形控制器(未示出)接收输入图像信号(R、G和B)以及用于控制输入图像信号的显示的多个输入控制信号，例如垂直同步信号Vsync、水平同步信号Hsync、主时钟信号MCLK、数据使能信号DE。信号控制器600根据输入控制信号适当处理输入图像信号(R、G和B)，从而产生符合液晶面板组件300的操作条件的图像数据DAT。然后，信号控制器600产生栅极控制信号CONT1和数据控制信号CONT2，将栅极控制信号CONT1传送到栅极驱动器400，并将数据控制信号CONT2和图像数据DAT传送到数据驱动器500。
栅极控制信号CONT1可以包括：扫描开始信号STV，用于启动栅极驱动器400的操作，即扫描操作；以及至少一个时钟信号，用于控制何时输出栅极导通电压Vg1。栅极控制信号CONT1也可以包括输出使能信号OE，用于限制栅极导通电压Vg1的持续时间。时钟信号可以被用作选择信号SE。
数据控制信号CONT2可以包括：水平同步开始信号STH，其指示图像数据DAT的传输；加载信号LOAD，其请求向数据线D1至Dm施加与图像数据DAT对应的数据电压；以及数据时钟信号HCLK。数据控制信号CONT2也可以包括反转信号RVS，用于反转数据电压相对于公共电压Vcom的极性，这此后被称为“数据电压的极性”。
数据驱动器500响应于数据控制信号CONT2从信号控制器600接收图像数据DAT，通过从由灰度电压产生器800提供的多个灰度电压中选择与图像数据DAT对应的灰度电压而将图像数据转换为数据电压。然后，数据驱动器500将数据电压施加到数据线D1至Dm。
栅极驱动器400通过响应于栅极控制信号CONT1向栅极线G1至Gn施加栅极导通电压Vg1而导通连接到栅极线G1至Gn的开关器件。然后，施加到数据线D1至Dm的数据电压通过导通的开关器件而被传送到每个像素PX。
施加到每个像素PX的数据电压和公共电压Vcom之间的差可以被解释为是利用其对每个像素PX的液晶电容器充电的电压，即像素电压。液晶层内的液晶分子的排列根据像素电压的幅度而变化，因而通过液晶层传送的光的极性也可以变化，从而导致液晶层的透射率的变化。
参照图2，每个像素PX包括开关器件T、液晶电容器Clc和存储电容器Cst。开关器件T被布置在第i(1≤i≤n)栅极线GLi和第j(1≤i≤m)数据线DLj之间的交汇处。开关器件T可以是薄膜晶体管(TFT)。
开关器件T包括连接到第i栅极线GLi的控制端、连接到第j条数据线DLj的输入端、以及连接到液晶电容器Clc和存储电容器Cst的输出端。
每个像素PX包括像素电极(未示出)，该像素电极连接到开关元件T的输出端。在朝向上显示面板的下显示面板上提供了公共电极。
根据本发明的实施例的触控显示屏采用显示与触控分时扫描：在显示图像(即显示阶段)时，公共电极为相应的像素PX提供公共电压；在触控扫描(即触控阶段)时，公共电极可作为驱动电极使用，用于产生驱动信号。
液晶电容器Clc包括连接到开关元件T的像素电极、公共电极、以及介于其间的液晶。存储电容器Cst包括像素电极、公共电极、以及介于期间的绝缘体。存储电容器Cst维持充电在液晶电容器Clc中的像素电压。
在显示阶段时，公共电压Vcom被施加到公共电极上。
当栅导通电压Vg1被施加到第i条栅线GLi时，开关元件T的控制端打开，数据电压通过开关元件T的输入端输入到第i行像素中的像素电极。即，数据电压充电在连接到第i条栅线GLi的液晶电容器Clc中。充电在液晶电容器Clc中的数据电压被称为像素电压。
当栅截止电压Vg2随后被施加到第i条栅线GLi时，开关元件T的控制端关闭，第i行像素中的像素电极被电断开。即，数据电压被施加到像素电极后，像素电极被维持在浮置(Floating)状态，即像素电位被提升并保持。
在触控扫描时，触控扫描信号被施加到公共电极上。
当触控扫描电压TP被施加到公共电极上时，被施加到第i条栅线GLi上的栅截止电压Vg2以同样地振幅值跟随触控扫描电压TP进行震荡，以避免开关元件T的控制端在触控扫描阶段被打开。
此外，进一步地，数据电压也可以以同样地振幅值跟随触控扫描电压TP进行震荡，这样可以在触控扫描阶段降低数据线与作为触控电极的公共电极之间的耦合电容，同时不会对栅极-源极电压Vgs产生影响。
以下将结合图3和图4对为何能避免开关元件T的控制端在触控扫描阶段被打开进行描述。在以下描述中，以PMOS-TFT作为示例来进行描述，但本发明并不限制于此，例如NMOS-TFT、CMOS-TFT也可以。
图3是根据本发明的实施例的栅极电压、数据电压及触控扫描电压的波形图。图4是根据本发明的实施例的栅极-源极电压Vgs与漏极电流Id的关系曲 线图。
参照图3，在显示阶段，当栅极电压为低电压时，即栅导通电压Vg1为-10V时，栅导通电压Vg1被施加到第i条栅线GLi上，开关元件T的控制端打开，数据电压5V通过开关元件T的输入端输入到第i行像素中的像素电极。即，数据电压5V充电在连接到第i条栅线GLi的液晶电容器Clc中。
当栅极电压为高电压时，即栅截止电压Vg2为7V时，栅截止电压Vg2被施加到第i条栅线GLi，开关元件T的控制端关闭，第i行像素中的像素电极被电断开。即，数据电压5V被施加到像素电极后，像素电极被维持在浮置(Floating)状态，像素电位Vpixel被提升并保持为5.2V。并且，相应的Vgs＝Vg2–Vpixel＝7V-5.2V＝1.8V；参照图4，当Vgs为1.8V时，对应到栅极-源极电压Vgs与漏极电流Id的关系曲线上，此时PMOS-TFT处于关闭状态。
接着，在触控扫描阶段，触控扫描电压TP被施加到公共电极上，其中，触控扫描电压TP的振幅值为4.3V，此时像素电位Vpixel被提升并保持为9.5V；如果栅截止电压Vg2不跟随触控扫描电压TP以同样地振幅值进行震荡时，则相应的Vgs＝Vg2–Vpixel＝7V-9.5V＝-2.5V；参照图4，当Vgs为-2.5V时，对应到栅极-源极电压Vgs与漏极电流Id的关系曲线上，此时PMOS-TFT处于打开状态，从而形成像素漏电流。
而如果栅截止电压Vg2以同样地振幅值跟随触控扫描电压TP进行震荡时，此时的栅截止电压Vg2＝7V+4.3V＝11.3V，则相应的Vgs仍然为1.8V，即Vgs＝Vg2–Vpixel＝11.3V-9.5V＝1.8V；参照图4，当Vgs为1.8V时，对应到栅极-源极电压Vgs与漏极电流Id的关系曲线上，此时PMOS-TFT处于关闭状态，从而不会形成像素漏电流。
综上所述，根据本发明的实施例，通过使栅截止电压以同样地振幅值跟随触控扫描电压进行震荡，以避免开关元件的控制端在触控扫描阶段被打开。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

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  1. 一种触控面板的驱动方法，其中，所述触控显示器包括交叉设置的栅极线和数据线、以及设置于所述栅极线和所述数据线的交叉处且连接所述栅极线和所述数据线的开关元件，其中，
    在触控扫描阶段，当触控扫描电压被施加时，被施加到所述栅极线上的栅截止电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以防止所述开关元件在触控扫描阶段被打开。
  2. 根据权利要求1所述的驱动方法，其中，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述数据线上的数据电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以降低所述数据线与作为触控电极的公共电极之间的耦合电容。
  3. 根据权利要求1所述的驱动方法，其中，所述开关元件为薄膜晶体管，所述薄膜晶体管的栅极连接到所述栅极线，所述薄膜晶体管的源极连接到所述数据线，所述薄膜晶体管的漏极连接到像素电极。
  4. 根据权利要求2所述的驱动方法，其中，所述开关元件为薄膜晶体管，所述薄膜晶体管的栅极连接到所述栅极线，所述薄膜晶体管的源极连接到所述数据线，所述薄膜晶体管的漏极连接到像素电极。
  5. 根据权利要求3所述的驱动方法，其中，所述薄膜晶体管为PMOS薄膜晶体管或者NMOS薄膜晶体管或者CMOS薄膜晶体管。
  6. 根据权利要求4所述的驱动方法，其中，所述薄膜晶体管为PMOS薄膜晶体管或者NMOS薄膜晶体管或者CMOS薄膜晶体管。
  7. 一种触控面板，包括交叉设置的栅极线和数据线、以及设置于所述栅极线和所述数据线的交叉处且连接所述栅极线和所述数据线的开关元件，其中，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述栅极线上的栅截止电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以防止所述开关元件在触控扫描阶段被打开。
  8. 根据权利要求7所述的触控面板，其中，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述数据线上的数据电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以降低所述数据线与作为触控电极的公共电极之间的耦合电容。
  9. 根据权利要求7所述的触控面板，其中，所述开关元件为薄膜晶体管，所述薄膜晶体管的栅极连接到所述栅极线，所述薄膜晶体管的源极连接到所述数据线，所述薄膜晶体管的漏极连接到像素电极。
  10. 根据权利要求8所述的触控面板，其中，所述开关元件为薄膜晶体管，所述薄膜晶体管的栅极连接到所述栅极线，所述薄膜晶体管的源极连接到所述数据线，所述薄膜晶体管的漏极连接到像素电极。
  11. 根据权利要求9所述的触控面板，其中，所述薄膜晶体管为PMOS薄膜晶体管或者NMOS薄膜晶体管或者CMOS薄膜晶体管。
  12. 根据权利要求10所述的触控面板，其中，所述薄膜晶体管为PMOS薄膜晶体管或者NMOS薄膜晶体管或者CMOS薄膜晶体管。
  13. 一种触控显示器，包括触控面板，所述触控面板包括交叉设置的栅极线和数据线、以及设置于所述栅极线和所述数据线的交叉处且连接所述栅极线和所述数据线的开关元件，其中，在触控扫描阶段，当触控扫描电压被施加时，被施加到所述栅极线上的栅截止电压以相同的振幅和频率跟随所述触控扫描电压进行振荡，以防止所述开关元件在触控扫描阶段被打开。
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