WO2015043095A1 - 触摸显示屏及其驱动方法 - Google Patents

触摸显示屏及其驱动方法 Download PDF

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Publication number
WO2015043095A1
WO2015043095A1 PCT/CN2013/090025 CN2013090025W WO2015043095A1 WO 2015043095 A1 WO2015043095 A1 WO 2015043095A1 CN 2013090025 W CN2013090025 W CN 2013090025W WO 2015043095 A1 WO2015043095 A1 WO 2015043095A1
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WIPO (PCT)
Prior art keywords
touch
signal
electrode
display
driving
Prior art date
Application number
PCT/CN2013/090025
Other languages
English (en)
French (fr)
Inventor
陈小川
薛海林
王磊
薛艳娜
车春城
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/384,997 priority Critical patent/US9612678B2/en
Publication of WO2015043095A1 publication Critical patent/WO2015043095A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

Definitions

  • the present invention relates to the field of display, and in particular, to a touch display screen and a driving method thereof. Background technique
  • the touch display has developed rapidly.
  • the current mainstream products adopt the external touch screen (Add on) structure design, but the traditional Add on touch screen has a thick overall structure and high cost.
  • the embedded (In Cell) LCD screens have become an important development direction in the field of touch display.
  • the existing in cell touch driving screen (hereinafter referred to as a touch driving screen) has a common common electrode due to the touch detection function and the display function, and in order to avoid the influence of the touch voltage on the display effect of the screen, the touch detection function is generally adopted.
  • the display function interacts in time, that is, the touch driving screen adopts time-sharing driving, for example: as shown in FIG. 8, wherein the solid line in FIG. 8 is a gate driving signal, the broken line is a touch driving signal, and the 60 Hz product is adopted.
  • Time-division driving then in a frame of 16.7ms, about 12ms for display, and 4ms for touch function, although the signal changes, but the human eye does not perceive, it is called time-sharing.
  • Touch-screened display with time-sharing can only perform touch detection within 4 ⁇ of the short time (the time used to implement the touch function), thus causing the reporting rate to be lower than the number of times the contact information is reported per second.
  • Embodiments of the present invention provide a touch display screen and a driving method thereof, which can improve a report rate.
  • a touch display screen includes a color filter substrate and an array substrate, wherein the color film substrate or the array substrate is provided with a common electrode, the common electrode has a strip shape, and one or more of the common electrodes simultaneously serve as a touch driving electrode; the touch display screen further includes:
  • the driving circuit is connected to the common electrode serving as the touch driving electrode, and is configured to load the touch driving pulse to the common electrode serving as the touch driving electrode, and load the common voltage in a time when the touch driving pulse is not loaded.
  • the driving circuit includes: a plurality of shift registers;
  • each shift register is connected to a common electrode serving as a touch drive electrode. Except for the first shift register and the last shift register, the output of each of the shift registers is adjacent thereto. The input of the next shift register is connected to the reset signal input of the previous shift register adjacent thereto,
  • the input of the first shift register inputs a frame start signal
  • the output of the first shift register is connected to the input of the second shift register
  • the output of the last shift register and its adjacent A reset signal input terminal of a shift register is connected to its reset signal input terminal
  • a common voltage is input to the low voltage signal input of each shift register.
  • the touch display screen further includes: a touch sensing electrode disposed on the color film substrate.
  • the touch display screen includes a plurality of display units, and one of the common electrodes corresponds to one or more rows of the display units.
  • the common electrode is disposed on the array substrate.
  • the common electrode is a slit electrode.
  • the driving circuit is disposed on the array substrate.
  • the input end of the first shift register inputs a frame start signal as a touch scan start signal.
  • An embodiment of the present invention further provides a driving method for displaying a touch screen, including:
  • a display signal is loaded to the display unit while a common voltage is applied to the touch drive electrodes corresponding to the display unit.
  • the common voltage is applied to the touch drive electrode corresponding to the display unit of the first display line, and simultaneously to the first ⁇ + ⁇
  • the touch driving electrode corresponding to the row display unit loads the touch driving signal, and so on, until the display unit of the last line of the touch display screen is loaded with the display signal; when the display signal is loaded from the last line to the last line, the display signal is only The touch driving electrode corresponding to the display unit is loaded with a common voltage;
  • the Nth row display unit and the N+K row display unit do not correspond to the same touch driving electrode, and both N and K are natural numbers, iLN ⁇ 1, K ⁇ 1.
  • the touch driving electrodes corresponding to any row of display units are loaded with one touch driving signal in one frame time.
  • the common voltage is maintained until the touch drive signal is loaded;
  • the touch drive signal is maintained until the common voltage is applied.
  • the common electrode is arranged in a strip shape, and some or all of the common electrodes are selected as the touch driving electrodes, and are connected to the touch driving electrodes (the common electrode serving as the touch driving electrodes)
  • the driving circuit can load the touch driving pulse to the touch driving electrode and load the common voltage in the time when the touch driving pulse is not loaded.
  • the duration of the touch drive pulse can be extended , thereby increasing the reporting rate of the touch display.
  • FIG. 1 is a schematic structural diagram of a touch display screen according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a touch driving electrode and a touch sensing electrode according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an array substrate of a touch display screen according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention.
  • Figure 5 (a) is a schematic structural diagram of a shift register
  • Figure 5 (b) is a drive timing diagram of a drive circuit including the shift register of Figure 5 (a);
  • FIG. 6 is a flowchart of a method for driving a touch display screen according to an embodiment of the present invention.
  • FIG. 7 is a timing diagram of a touch display screen according to an embodiment of the present invention.
  • FIG. 8 is a timing diagram of time-division driving of the touch display screen in the prior art. Description of the reference numerals
  • the embodiment of the present invention provides a touch display screen.
  • the method includes: a color filter substrate 20 and an array substrate 10 .
  • the array substrate 10 is provided with a common electrode 12
  • the common electrode 12 has a strip shape and is in the common electrode 12 .
  • One or more of the touch driving electrodes are simultaneously used;
  • the touch display screen further includes: a driving circuit (not shown in FIG. 1 ) connected to the common electrode 12 serving as a touch driving electrode for acting as a touch driving electrode
  • the common electrode 12 loads the touch drive pulse and loads the common voltage during the time when the touch drive pulse is not loaded.
  • the touch display screen in order to implement the touch function, the touch display screen generally needs to be provided with a touch driving electrode and a touch sensing electrode.
  • the touch sensing electrode 21 in this embodiment is generally disposed on the color film substrate 20, specifically The position of the touch sensing electrode 21 should be as close as possible to the substrate of the color filter substrate.
  • the touch sensing electrode 21 is specifically located above the color film layer 22 of the color filter substrate 20 and the touch driving electrode. (The strip-shaped common electrode 12 acts as an overlap setting).
  • the common electrode 12 in this embodiment may be disposed on the array substrate 10, such as an ADS (Advanced Super Dimension Switch) mode, or an IPS (In-Plane Switching) mode; 12 may also be disposed on the color filter substrate 20, such as a TN (twisted Nematic liquid crystal mode) mode.
  • ADS Advanced Super Dimension Switch
  • IPS In-Plane Switching
  • TN twisted Nematic liquid crystal mode
  • the driving circuit is disposed on the array substrate for the preparation process. Therefore, when the common electrode 12 is disposed on the color filter substrate 20, it is required to pass through the array substrate 10 and the color filter substrate 20.
  • An interlayer conductive ball is disposed between the touch driving electrodes (ie, the common electrode serving as the touch driving electrode in the embodiment of the present invention) on the array substrate 10, and is connected to the driving circuit on the array substrate 10.
  • the strip-shaped common electrode 12 is disposed on the array substrate 10 , specifically located on the lower layer of the pixel electrode 11 , and the touch driving electrode ( Simultaneously acting as a common electrode of the touch driving electrode) and the touch sensing electrode 21 through the thickness of the liquid crystal and the liquid crystal cell ( Cell gap ) is separated, and it is not necessary to provide an insulating layer between the touch driving electrode and the touch sensing electrode 21 .
  • the pixel electrode 11 is a slit electrode.
  • the common electrode 12 is arranged at a position closer to the liquid crystal, that is, the common electrode 12 is located above the pixel electrode 11, and at this time, the common electrode is a strip-shaped slit electrode.
  • the display mode of the touch display screen is not limited in the present invention.
  • the common electrodes are arranged in a strip shape, and one row of display units of the touch display screen may be arranged correspondingly with one row of pixel electrodes, or as shown in FIG. 3, one or more rows of display units of the touch screen are A common electrode 12 corresponds to one touch drive electrode corresponding to one or more rows of pixel electrodes.
  • common electrodes may be selected as the touch driving electrodes in the embodiment of the present invention; one or more of the common electrodes may also be selected as the touch driving electrodes.
  • the common electrode is disposed in a strip shape, and part or all of the common electrode is selected as a touch driving electrode, and a driving circuit connected to the touch driving electrode (a common electrode serving as a touch driving electrode)
  • the touch drive pulse can be loaded to the touch drive electrode, and the common voltage can be loaded during the time when the touch drive pulse is not loaded.
  • the duration of the touch drive pulse can be maintained. The time is extended to increase the reporting rate of the touch display.
  • the touch display screen requires at least four signals: the source signal (Source signal), the gate signal (Gate signal), and the common voltage (Vcom signal) required for the display function, which are required for the touch function.
  • the gate signal is provided by a GOA (Gate On Array) unit integrated on the array substrate, but the timing of driving the GOA unit is provided by a separately attached driving chip (driver IC), and the remaining signals required for the touch screen display are also Provided by the driver IC.
  • GOA Gate On Array
  • the touch display screen provided by the embodiment of the invention can provide a common voltage and a touch driving signal by a driving circuit disposed on the array substrate, thereby reducing the output signal of the driving chip (IC) and reducing the complexity of the driving chip. Reduce costs while reducing the thickness of the touchscreen panel and the width of the bezel.
  • GOA Gate onArray
  • LCD Panel liquid crystal panel
  • the touch display panel includes the array substrate shown in FIG. 3.
  • the gate lines 14 are arranged horizontally on the array substrate, the data lines 13 are vertically arranged, and the gate lines 14 and the data lines 13 are vertically criss-crossed.
  • the substrate 10 is divided into a plurality of display units (pixels), and the touch driving electrodes (served by the strip-shaped common electrodes 12) are parallel to the gate lines, and the plurality of rows of display units correspond to one touch driving electrodes.
  • the common electrode 12 serving as the touch driving electrode is connected to the driving circuit 15.
  • the driving circuit 15 can be disposed on the array substrate 10. As shown in FIG. 3, specifically, the driving circuit 15 and the GOA unit can respectively provide the left and right sides of the array substrate 10.
  • the frame occlusion area, the drive IC 16 that provides a trigger signal for the drive circuit 15 and the GOA unit can be attached to the lower frame (or upper frame) occlusion area.
  • the drive circuit 15 can be formed synchronously, which saves cost. The embodiments are not described herein again.
  • a common electrode serving as a touch driving electrode is connected to the driving circuit 15, and the driving circuit 15 is for applying a common voltage and a touch driving signal to a common electrode serving as a touch driving electrode.
  • the touch display screen provided by the embodiment of the invention can provide a common voltage and a touch driving signal by a driving circuit disposed on the array substrate, thereby reducing the output signal of the driving chip (IC) and reducing the complexity of the driving chip. Reduce costs while reducing the thickness of the touchscreen panel and the width of the bezel.
  • the driving circuit of the embodiment is connected to a common electrode serving as a touch driving electrode, and is configured to load a touch driving pulse to the common electrode serving as the touch driving electrode, and load the public time when the touch driving pulse is not loaded. Voltage.
  • the embodiment of the present invention does not limit the implementation manner of the driving circuit, and may be any implementation manner well known to those skilled in the art. The following embodiment only cites one example:
  • the driving circuit includes: a plurality of shift register units (SR1 ⁇ SRN); and an output end of each shift register is connected to a common electrode 12 serving as a touch driving electrode. Except for the first shift register SR1 and the last shift register, the output of each of the other shift registers is reset to the input of the next shift register adjacent thereto and the previous shift register adjacent thereto
  • the signal input terminal is connected, the input end of the first shift register inputs a frame start signal (STV), the output end of the first shift register is connected to the input end of the second shift register, and the last shift register is The output terminal is connected to the reset signal input terminal of the previous shift register adjacent thereto and its reset signal input terminal, and the low voltage signal input terminal (VSS terminal) of each shift register inputs a common voltage.
  • the clock signal input terminal of each shift register inputs a clock signal CLK
  • the number of clock signals CLK is related to the internal structure of the shift register, which is not limited.
  • the internal structure of the shift register is not limited. Only the low voltage signal input terminal (VSS terminal) inputs a common voltage, and the input terminal of the first shift register inputs the frame start signal STV as a touch scan enable signal.
  • VSS terminal low voltage signal input terminal
  • STV frame start signal
  • the clock signals CLK1 to CLK4 are output in accordance with the timing shown in Figure 5(b).
  • the shift register input signal input signal
  • the shift register input signal input signal
  • the output signal of the previous line is high
  • the unit is charged at this time. After the charging is completed, the potential of the PU point is high, and the noise is discharged.
  • CLK2 goes from low to high
  • the other side of the capacitor produces an output signal.
  • CLK3 is high
  • the Nth line outputs a touch drive pulse.
  • CLK4 goes from low to high, CLK3 goes from high to low, and CLK4 passes through the thin film transistor. Mil pulls the output of the Nth line low, the output of this line ends, and M10 works, and the output of the N+1th line starts.
  • the output of the N+1th line is the input signal of the N+2th row (i.e., the signal input to the input of the N+2th row shift register).
  • the output of the next line, line N+2 is the reset signal (reset signal) of the previous unit.
  • the reset signal will discharge the power across the capacitor and the output will be in the VSS low-signal state, which is the output common voltage.
  • the drive circuit outputs the touch drive pulse line by line and outputs a common voltage within a period in which the touch drive pulse is not output.
  • the CLK2 bit of the odd row shift register is connected to the CLK1 signal and the CLK1 bit is connected to the CLK2 signal
  • the CLK2 bit of the even row shift register is connected to the CLK2 signal
  • the CLK1 bit is connected to the CLK1 signal
  • the even row shift register is The CLK2 is connected to the CLK1 signal
  • the CLK1 is connected to the CLK2 signal.
  • the CLK2 of the odd-line shift register is connected to the CLK2 signal, and the CLK1 is connected to the CLK1 signal.
  • the driving circuit shift register can use the existing 4T1C gate driver model, similar to the driving method of the gate, and the driving circuit can be disposed on the array substrate for saving the frame.
  • the driving circuit can be disposed on the array substrate.
  • those skilled in the art often collectively refer to the driving circuit and the existing gate driver on the array substrate as a GOA unit.
  • the touch display screen provided by the embodiment of the invention can reduce the output signal of the driving chip (IC), reduce the complexity of the driving chip, thereby reducing the cost, and at the same time reducing the thickness of the panel of the touch display screen and the width of the border.
  • IC driving chip
  • an embodiment of the present invention further provides a driving method for displaying a touch screen.
  • the method includes: Step 101: Load a touch driving signal to the touch driving electrode corresponding to the display unit at a first time before the display unit of the touch display screen loads the display signal;
  • Step 102 Load a display signal to the display unit, and simultaneously load a common voltage to the touch driving electrode corresponding to the display unit.
  • the common electrode is arranged in a strip shape, and a part or all of the common electrode is selected as the touch driving electrode, and the driving circuit is connected with the touch driving electrode (the common electrode serving as the touch driving electrode)
  • the utility model can provide a common voltage to the touch driving electrode and a touch driving signal to the touch driving electrode.
  • the driving circuit outputs a touch driving signal to the touch driving electrode corresponding to the row of pixels (display unit), in the color film
  • the touch sensing electrode on one side of the substrate senses the signal and realizes touch addressing, thereby realizing the touch function, and also reducing the driving signal output by the driving IC, thereby reducing the cost of the driving IC.
  • the touch driving electrode is served by a common electrode.
  • the common voltage is applied to the touch drive electrode corresponding to the display unit of the first display line, and simultaneously to the first ⁇ + ⁇
  • the touch driving electrode corresponding to the row display unit loads the touch driving signal, and so on, until the display unit of the last line of the touch display screen is loaded with the display signal; when the display signal is loaded from the last line to the last line, the display signal is only The touch drive electrode corresponding to the display unit is loaded with a common voltage; wherein, the first display unit and the third display unit do not correspond to the same touch drive electrode, and both ⁇ and ⁇ are natural numbers, JN>1, K ⁇ l .
  • a large part of the common electrode on the array substrate is connected to the Vcom DC signal, that is, the input common voltage is used to ensure the normal display of the product.
  • the common electrode that we selected to serve as the touch driving electrode (the specific number of lines is displayed according to the touch)
  • the design requirements of the screen generally set 15-25 lines) are driven by the driver circuit.
  • This part (which acts as the common electrode of the touch drive electrode) can load the common voltage or load the touch drive signal.
  • all of the common electrodes function as touch drive electrodes.
  • the touch driving electrode on the array substrate outputs a touch driving signal such as a +5V pulse through a shift register, and the touch sensing electrode disposed on one side of the color film substrate senses a signal to realize touch addressing.
  • a touch driving signal such as a +5V pulse
  • the touch sensing electrode disposed on one side of the color film substrate senses a signal to realize touch addressing.
  • the VCOM signal of the N+1 unit is changed, and a +5V touch signal is output.
  • the N+1th line is to be displayed and charged.
  • the Vcom signal is output to ensure that the display is normal.
  • the first time in the embodiment is the time when the display unit of the previous line performs display charging.
  • the touch driving electrodes corresponding to any row of display units are loaded with one touch driving signal in one frame time.
  • the common voltage is maintained until the touch driving signal is loaded; and the touch driving electrode corresponding to any row of display units is loaded with the touch driving signal. After that, the touch drive signal is maintained until the common voltage is applied.
  • the advantages of the touch driving screen and the driving method thereof of the present invention are mainly two aspects:
  • time-sharing driving for example: as shown in Fig. 8, wherein the solid line in the figure is the gate driving signal, the dotted line is the touch driving signal, 60Hz
  • the product adopts time-sharing driving, then in a frame of 16.7ms, 12ms is used for display, and in 4ms, it is used to realize the touch function.
  • the signal changes, but the human eye does not perceive it, it is called time-division drive.
  • the touch driving screen provided by the embodiment of the present invention does not use the time-division driving, but uses a short time before the pixel (display unit) line is charged, and the pixel (display unit) row corresponds to the common touch driving electrode.
  • the electrode which outputs the touch drive signal, does not affect the display, and can improve the report rate of the touch screen.
  • the touch driving signal (TX signal) and the sensing signal (RX signal) required for implementing the touch function are all driven by independent touch driving chips, and the embodiment of the present invention
  • the touch driving screen is provided, and the Tx signal is outputted by a driving circuit integrated on the array substrate.
  • the driving circuit gives a voltage (for example, about 5V) Voltage) to achieve the drive, the Vcom voltage is maintained for the duration of the output.
  • the output signal of the driver chip (IC) can be reduced, the complexity of the driver chip fabrication can be reduced, thereby reducing the cost and reducing the panel thickness and the frame width.
  • the touch display screen provided by the embodiment of the present invention is different in the production of the traditional ADS display screen.
  • the entire surface ITO needs to be formed into a strip shape (slit shape) to form a common electrode, as shown in FIG.
  • the invention can reduce the effect of blind touch loss to a certain extent, thereby improving the reporting rate.
  • the time-division driving is used. If the touch is performed in the display phase within 12 ms of the display function, the report may not be performed, and the touch may be implemented in the design of the embodiment of the present invention.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Computer Hardware Design (AREA)

Abstract

本发明实施例公开了一种触摸显示屏及其驱动方法，涉及显示领域，既能减小面板厚度以及边框宽度，又可降低成本。本发明的触摸显示屏，包括彩膜基板和阵列基板，所述彩膜基板或所述阵列基板上设置有公共电极，所述公共电极呈条形，所述公共电极中的一个或多个同时充当触控驱动电极；所述触摸显示屏还包括：与所述触控驱动电极相连的驱动电路，与充当触控驱动电极的公共电极相连，用于向所述充当触控驱动电极的公共电极加载触摸驱动脉冲，并在不加载所述触摸驱动脉冲的时间内加载公共电压。

Description

触摸显示屏及其驱动方法
技术领域
本发明涉及显示领域， 尤其涉及一种触摸显示屏及其驱动方法。 背景技术
触摸显示屏发展迅速， 当前主流产品都采用了外置触摸屏 ( Add on ) 的结 构设计， 但传统 Add on触摸屏， 整体机构厚重， 成本较高， 随着消费者对显示 器的薄化需求， 嵌入式（In Cell )液晶屏成为触摸显示领域中一个重要发展的方 向。
In Cell触摸显示屏， 一般指驱动电极及感应电极都设计在液晶盒内部的结 构。 现有 in cell触摸驱动屏（以下筒称： 触摸驱动屏）， 由于触摸检测功能和显 示功能一般公用公共电极， 而为了避免因触控电压的变化影响画面的显示效果， 一般采用触摸检测功能和显示功能在时间上交互进行的方式， 即触摸驱动屏采 用分时驱动， 例如： 如图 8所示， 其中， 图 8中实线为栅极驱动信号， 虚线为触 摸驱动信号， 60Hz的产品采用分时驱动， 那么在一帧 16.7ms时间中， 12ms左右 用来显示， 在 4ms时间用来实现触摸功能， 虽然信号发生变化， 但是人眼感知不 到， 故称之为分时驱动。 采用分时驱动的触摸显示屏只能在 4艮短的时间 （用来 实现触摸功能的时间） 内进行触摸检测， 因此， 导致报点率即每秒钟上报触点 信息的次数较低。 发明内容
本发明的实施例提供一种触摸显示屏及其驱动方法， 可提高报点率。
为达到上述目的， 本发明的实施例采用如下技术方案：
一种触摸显示屏， 包括彩膜基板和阵列基板， 所述彩膜基板或所述阵列基 板上设置有公共电极， 所述公共电极呈条形， 所述公共电极中的一个或多个同 时充当触控驱动电极； 所述触摸显示屏还包括：
驱动电路， 与充当触控驱动电极的公共电极相连， 用于向所述充当触控驱 动电极的公共电极加载触摸驱动脉沖， 并在不加载所述触摸驱动脉沖的时间内 加载公共电压。 可选地， 所述驱动电路包括： 多个移位寄存器；
每一移位寄存器的输出端均与一条充当触控驱动电极的公共电极连接， 除第一个移位寄存器和最后一个移位寄存器外， 其余每个移位寄存器的输 出端均和与其相邻下一个移位寄存器的输入端以及与其相邻的上一个移位寄存 器的复位信号输入端连接，
第一个移位寄存器的输入端输入帧起始信号， 第一个移位寄存器的输出端 与第二个移位寄存器的输入端连接， 最后一个移位寄存器的输出端和与其相邻 的上一个移位寄存器的复位信号输入端以及自身的复位信号输入端连接，
每个移位寄存器的低电压信号输入端输入公共电压。
具体地， 所述的触摸显示屏， 还包括： 触控感应电极， 设置于所述彩膜基 板上。
具体地， 所述触摸显示屏包括多个显示单元， 一条所述公共电极与一行或 多行所述显示单元相对应。
可选地， 所述公共电极设置在所述阵列基板上。
可选地， 所述公共电极为狭缝电极。
可选地， 所述驱动电路设置于所述阵列基板上。
可选地， 所述第一个移位寄存器的输入端输入帧起始信号作为触控扫描启 动信号。
本发明的实施例还提供一种显示触摸屏的驱动方法， 包括：
在触摸显示屏的显示单元加载显示信号之前的第一时间， 向所述显示单元 对应的触控驱动电极加载触摸驱动信号；
向所述显示单元加载显示信号， 同时向所述显示单元对应的触控驱动电极 加载公共电压。
上述驱动方法的一种具体实施方式如下：
加载一帧显示信号时，先向触摸显示屏的第 1~K行显示单元对应的触控驱动 电极， 逐个加载触摸驱动信号；
然后从触摸显示屏的第 1行显示单元开始： 在触摸显示屏的第 Ν行显示单元 加载显示信号时， 向第 Ν行显示单元对应的触控驱动电极加载公共电压， 同时向 第 Ν+Κ行显示单元对应的触控驱动电极加载触摸驱动信号， 依次类推， 直至触 摸显示屏的倒数第 Κ行显示单元加载上显示信号； 从倒数第 Κ行到最后一行显示 单元加载显示信号时， 只向所述显示单元对应的触控驱动电极加载公共电压； 其中， 第 N行显示单元和第 N+K行显示单元不对应同一条触控驱动电极， N 和 K均为自然数， iLN≥ 1 , K≥ 1。
可选地， 所述的驱动方法， 在一帧的时间里， 任一行显示单元对应的触控 驱动电极加载一次触摸驱动信号。
可选地， 在一帧的时间里，
任一行显示单元对应的触控驱动电极加载公共电压后， 维持公共电压直至 加载上触摸驱动信号；
任一行显示单元对应的触控驱动电极加载触摸驱动信号后， 维持触摸驱动 信号直至加载上公共电压。
本发明实施例提供的触摸显示屏及其驱动方法， 公共电极设置成条形， 选 择部分或全部公共电极充当触控驱动电极， 且与触控驱动电极（充当触控驱动 电极的公共电极）相连的驱动电路， 既可向触控驱动电极加载触摸驱动脉沖， 又可在不加载触摸驱动脉沖的时间内加载公共电压。 在一帧画面显示时间内， 对任意一条充当触控驱动电极的公共电极而言， 除触摸驱动脉沖的持续时间外， 即是保持公共电压的时间， 因此， 可将触摸驱动脉沖的持续时间延长， 从而提 高触摸显示屏的报点率。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例中所需要 使用的附图作筒单地介绍， 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它的附图。
图 1为本发明实施例提供的触摸显示屏的结构示意图；
图 2为本发明实施例提供的触控驱动电极和触控感应电极的结构示意图； 图 3为本发明实施例中触摸显示屏的阵列基板的结构示意图；
图 4为本发明实施例提供的驱动电路的结构示意图；
图 5(a)为一种移位寄存器的结构示意图；
图 5(b)为包含图 5(a)的移位寄存器的驱动电路的驱动时序图；
图 6为本发明实施例提供的触摸显示屏的驱动方法流程图；
图 7为本发明实施例提供的触摸显示屏的时序图；
图 8为现有技术中触摸显示屏分时驱动的时序图。 附图标记说明
10-阵列基板， 11-像素电极， 12-公共电极， 13-数据线， 14-栅线，
15-驱动电路， 16-驱动芯片， 20-彩膜基板， 21-触控感应电极，
22-彩膜层。 具体实施方式
下面将结合本发明实施例中的附图， 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它实施例， 都属于本发明保护的范围。
本发明实施例提供一种触摸显示屏， 如图 1所示， 包括： 彩膜基板 20和阵列 基板 10, 阵列基板 10上设置有公共电极 12, 公共电极 12呈条形， 公共电极 12中 的一个或多个同时充当触控驱动电极； 所述触摸显示屏还包括： 驱动电路（图 1 中未示出）， 与充当触控驱动电极的公共电极 12相连， 用于向充当触控驱动电极 的公共电极 12加载触摸驱动脉沖， 并在不加载触摸驱动脉沖的时间内加载公共 电压。
如图 2所示， 要实现触控功能， 触摸显示屏一般需设置触控驱动电极和触控 感应电极， 本实施例中的触控感应电极 21—般设置在彩膜基板 20上， 具体地， 触控感应电极 21的位置应尽可能靠近彩膜基板的基板， 例如， 如图 1所示， 触控 感应电极 21具体位于彩膜基板 20上彩膜层 22的上方， 与触控驱动电极（条形的 公共电极 12充当） 交叠设置。 而本实施例中的公共电极 12可设置在阵列基板 10 上， 如 ADS ( Advanced Super Dimension Switch, 高级超维场转换）模式， 或者 IPS (In-Plane Switching, 平面转换)模式； 此外， 公共电极 12也可以设置在彩膜 基板 20上， 如 TN ( twisted Nematic liquid crystal mode, 扭曲向列型）模式。
只是， 可选地， 出于制备工艺上的考虑， 所述驱动电路设置于阵列基板上， 因此， 当公共电极 12设置在彩膜基板 20上时， 需要通过在阵列基板 10和彩膜基 板 20之间设置层间导电球将触控驱动电极（即本发明实施例中同时充当触控驱 动电极的公共电极） 引至阵列基板 10上， 与位于阵列基板 10上的驱动电路相连。
具体地， 如图 1所示， 为本实施例的一种具体实施方式， 其中， 条形的公共 电极 12设置在阵列基板 10上， 具体位于像素电极 11的下一层， 触控驱动电极（同 时充当触控驱动电极的公共电极）和触控感应电极 21通过液晶及液晶盒厚度 ( Cell gap ) 隔开， 无需在触控驱动电极和触控感应电极 21之间设置绝缘层。 其 中， 像素电极 11为狭缝电极，
当然， 也可以将公共电极 12设置在更靠近液晶的位置， 即公共电极 12位于 像素电极 11的上方， 此时， 公共电极为条状的狭缝电极。
显然， 本发明实施例虽然以 ADS模式为例， 但本发明对触摸显示屏的显示 模式不做限定。
本发明实施例中公共电极设置成条形， 所述触摸显示屏的一行显示单元可 以与一行像素电极——对应排列， 也可以如图 3所示， 触摸显示屏的一行或多行 显示单元与一条公共电极 12相对应， 即一条触控驱动电极与一行或多行像素电 极对应排列。
另外， 需要注意的是， 本发明实施例可以选择全部的公共电极充当触控驱 动电极； 也可以选择公共电极中的一个或多个充当触控驱动电极。
本发明实施例提供的触摸显示屏， 公共电极设置成条形， 选择公共电极中 的部分或全部充当触控驱动电极， 与触控驱动电极（充当触控驱动电极的公共 电极）相连的驱动电路， 既可向触控驱动电极加载触摸驱动脉沖， 又可在不加 载触摸驱动脉沖的时间内加载公共电压。 这样， 在一帧画面显示时间内， 对任 意一条充当触控驱动电极的公共电极而言， 除触摸驱动脉沖的持续时间外， 即 是保持公共电压的时间， 因此， 可将触摸驱动脉沖的持续时间延长， 从而提高 触摸显示屏的报点率。
此外， 为实现触摸显示功能， 触摸显示屏至少需要四路信号： 实现显示功 能需要的源极信号（Source信号）、 栅极信号（Gate信号）和公共电压（Vcom 信号）， 实现触摸功能需要的触摸驱动信号 （TX信号）和感应信号 （RX信号）。 其中， 栅极信号由集成在阵列基板上的 GOA ( Gate onArray )单元提供， 但是驱 动 GOA单元的时序等信号是由另外贴合的驱动芯片 （驱动 IC )提供， 触摸显示 屏需要的其余信号也通过驱动 IC来提供。 因此， 现有触摸显示屏虽然可以实现 触摸显示功能， 但驱动芯片需要输出的信号多， 驱动芯片制作复杂， 成本高， 不符合消费者对触摸显示屏轻薄化、 窄边框化的需求。 本发明实施例提供的触 摸显示屏， 可由设置于阵列基板上的驱动电路提供公共电压和触摸驱动信号， 这样， 可减少驱动芯片 （IC ) 的输出信号， 降低驱动芯片制作时的复杂度， 从 而降低成本， 同时还可减小触摸显示屏的面板厚度以及边框宽度。
其中， GOA: Gate onArray, 是 TFT-LCD中一种高技术水平设计， 基本概念 是将液晶面板（LCD Panel ) 的栅驱动器（Gate driver ) 集成在阵列基板上， 形 成对面板的扫描驱动。
本实施例的一种具体实施方式中， 触摸显示屏包括图 3所示的阵列基板， 阵 列基板上栅线 14横向排列， 数据线 13纵向排列， 栅线 14与数据线 13纵横交错， 将阵列基板 10分割成多个显示单元（像素）， 触控驱动电极（由条形公共电极 12 充当）与栅线平行， 多行显示单元与一条触控驱动电极相对应。
充当触控驱动电极的公共电极 12与驱动电路 15相连， 驱动电路 15可设置在 阵列基板 10上， 如图 3所示， 具体地， 驱动电路 15和 GOA单元可分别设置阵列基 板 10的左右两个边框遮挡区域， 为驱动电路 15和 GOA单元提供触发信号的驱动 IC16可贴合在下边框（或上边框）遮挡区域。 制备阵列基板（Array工序） 时， 可同步形成驱动电路 15, 节省了成本。 实施例在此不再赘述。 充当触控驱动电极的公共电极与驱动电路 15相连， 驱动 电路 15用于向充当触控驱动电极的公共电极加载公共电压和触摸驱动信号。
本发明实施例提供的触摸显示屏， 可由设置于阵列基板上的驱动电路提供 公共电压和触摸驱动信号， 这样， 可减少驱动芯片 （IC ) 的输出信号， 降低驱 动芯片制作时的复杂度， 从而降低成本， 同时还可减小触摸显示屏的面板厚度 以及边框宽度。
本实施例所述驱动电路与充当触控驱动电极的公共电极相连， 用于向所述 充当触控驱动电极的公共电极加载触摸驱动脉沖， 并在不加载所述触摸驱动脉 沖的时间内加载公共电压。 本发明实施例对所述驱动电路的实现方式不做限定， 可以是本领域技术人员所熟知的任意实现方式， 下面本实施例仅举出一种作为 范例：
可选地，如图 4所示，所述驱动电路包括：多个移位寄存器单元（SR1~SRN ); 每一移位寄存器的输出端均与一条充当触控驱动电极的公共电极 12连接， 除第 一个移位寄存器 SR1和最后一个移位寄存器外，其余每个移位寄存器的输出端均 和与其相邻下一个移位寄存器的输入端以及与其相邻的上一个移位寄存器的复 位信号输入端连接， 第一个移位寄存器的输入端输入帧起始信号 （STV ), 第一 个移位寄存器的输出端与第二个移位寄存器的输入端连接， 最后一个移位寄存 器的输出端和与其相邻的上一个移位寄存器的复位信号输入端以及自身的复位 信号输入端连接，每个移位寄存器的低电压信号输入端（VSS端）输入公共电压。 除此之外， 每个移位寄存器的时钟信号输入端输入时钟信号 CLK, 时钟信 号 CLK的数目与移位寄存器的内部结构有关， 并不作限定。
本实施例对移位寄存器的内部结构不作限定， 只需低电压信号输入端（VSS 端）输入公共电压，第一个移位寄存器的输入端输入帧起始信号 STV作为触控扫 描启动信号。 下面仅以其中图 5(a)所示移位寄存器为例， 分阶段详细描述本发明 实施例的驱动电路的工作过程：
时钟信号 CLK1~CLK4按照图 5(b)所示的时序输出。 当移位寄存器输入信号 ( input信号） 由低变高时， 也就是上一行的输出信号为高时， 这时对此单元进 行充电， 充电完成后 PU点的电势为高， 将噪声放掉。 而当 CLK2由低变高时， 电 容另一侧产生输出信号，当 CLK3为高电平时，第 N行输出触摸驱动脉沖；当 CLK4 由低变高， CLK3由高变低后， CLK4通过薄膜晶体管 Mil将第 N行输出拉低， 此 行输出结束， 同时 M10工作， 第 N+1行输出开始。 第 N+1行的输出是第 N+2行的 input信号 （即输入第 N+2行移位寄存器的输入端的信号）。 下一行即第 N+2行的 输出， 就是上一单元的复位信号 （reset信号）。 reset信号会将整个电容两端的电 放掉， 输出为 VSS常低信号状态， 即输出公共电压。 依次类推， 驱动电路逐行输 出触摸驱动脉沖， 并在不输出触摸驱动脉沖的时间内输出公共电压。
需要注意， 如果奇数行移位寄存器的 CLK2位置接 CLK1信号， CLK1位置接 CLK2信号， 则偶数行移位寄存器的 CLK2位置接 CLK2信号， CLK1位置接 CLK1 信号； 或者， 如果偶数行移位寄存器的 CLK2位置接 CLK1信号， CLK1位置接 CLK2信号， 则奇数行移位寄存器的 CLK2位置接 CLK2信号， CLK1位置接 CLK1 信号。
本发明实施例， 所述驱动电路移位寄存器可以使用现有的 4T1C的栅极驱动 器模型， 同栅极的驱动方式相类似， 也可以为了节省边框采用将驱动电路设置 在阵列基板上。
本发明实施例可以将驱动电路设置在阵列基板上， 这时， 本领域技术人员 往往将驱动电路和阵列基板上现有的栅极驱动器一起统称为 GOA单元。
本发明实施例提供的触摸显示屏， 可减少驱动芯片 （IC ) 的输出信号， 降 低驱动芯片制作时的复杂度， 从而降低成本， 同时还可减小触摸显示屏的面板 厚度以及边框宽度。
对应上述结构描述， 本发明的实施例还提供一种显示触摸屏的驱动方法， 如图 6所示， 该方法包括： 步骤 101、 在触摸显示屏的显示单元加载显示信号之前的第一时间， 向显示 单元对应的触控驱动电极加载触摸驱动信号；
步骤 102、 向显示单元加载显示信号， 同时向显示单元对应的触控驱动电极 加载公共电压。
本发明实施例所述的触摸显示屏， 公共电极设置成条形， 选择部分或全部 公共电极充当触控驱动电极， 且与触控驱动电极（充当触控驱动电极的公共电 极）相连的驱动电路， 既可向触控驱动电极提供公共电压， 又可向触控驱动电 极提供触摸驱动信号。 在即将给像素 （显示单元） 充电前的短暂时间 （即本实 施例所述的第一时间）， 驱动电路向该行像素（显示单元）对应的触控驱动电极 输出触摸驱动信号， 在彩膜基板一侧的触控感应电极感应到信号， 实现触摸寻 址， 从而实现了触控功能， 同时还减少了驱动 IC输出的驱动信号， 降低了驱动 IC的成本。 其中， 所述触控驱动电极由公共电极充当。
具体地， 参照图 3所示， 上述驱动方法的一种具体实施方式如下：
加载一帧显示信号时，先向触摸显示屏的第 1~K行显示单元对应的触控驱动 电极， 逐个加载触摸驱动信号；
然后从触摸显示屏的第 1行显示单元开始： 在触摸显示屏的第 Ν行显示单元 加载显示信号时， 向第 Ν行显示单元对应的触控驱动电极加载公共电压， 同时向 第 Ν+Κ行显示单元对应的触控驱动电极加载触摸驱动信号， 依次类推， 直至触 摸显示屏的倒数第 Κ行显示单元加载上显示信号； 从倒数第 Κ行到最后一行显示 单元加载显示信号时， 只向显示单元对应的触控驱动电极加载公共电压； 其中， 第 Ν行显示单元和第 Ν+Κ行显示单元不对应同一条触控驱动电极， Ν和 Κ均为自 然数， J-N>1 , K≥l。
阵列基板上很大一部分公共电极连接的是 Vcom直流信号， 即输入公共电 压， 用来保证产品的正常显示， 只有其中我们选取的用来充当触控驱动电极的 公共电极（具体行数根据触摸显示屏的设计要求来定， 一般设定 15-25行）是通 过驱动电路来实现驱动的， 这部分（充当触控驱动电极的公共电极） 即可加载 公共电压， 也可加载触摸驱动信号。 当然， 也可以设计成全部公共电极均充当 触控驱动电极。
如图 7所示， 其中， 实线为栅极驱动信号， 虚线为触摸驱动信号。 为便于理 解， 下面叙述中 K=l时， 对于驱动电路驱动的某一行公共电极（充当触控驱动电 极的） 而言， 该行公共电极对应像素的上一行开始有栅信号脉沖进行充电时， 驱动电路中的移位寄存器就设定驱动电路给出一个脉沖 （例如， +5V的脉沖）， 等到上一行充电完成时， 驱动电路输出公共电压 （Vcom信号）， 并且在下一帧 来临之前一直保持 Vcom信号。 依次类推， 在一帧的时间里， 驱动电路在每个公 共电极走线中输出一次脉沖信号， 其它时候输出 Vcom信号来保证显示画面。
而在这一帧时间里， 阵列基板上的触控驱动电极通过移位寄存器输出了触 摸驱动信号如 +5V脉沖， 彩膜基板一侧设置的触控感应电极感应到信号， 实现触 摸寻址， 从而实现了 in cell触控功能， 同时减少了驱动 IC输出的驱动信号， 降低 了驱动 IC的成本。
本发明实施例在 N行单元在进行显示充电时， 对 N+ 1单元的 VCOM信号进行 变化， 输出一个 +5V的触摸信号， 当 N行充电完成后， 第 N+1行要进行显示充电 时， 输出 Vcom信号， 保证显示正常， 此时， 本实施例所述第一时间即是上一行 显示单元进行显示充电的时间。
可选地， 所述的驱动方法， 在一帧的时间里， 任一行显示单元对应的触控 驱动电极加载一次触摸驱动信号。
可选地， 所述的驱动方法中， 任一行显示单元对应的触控驱动电极加载公 共电压后， 维持公共电压直至加载上触摸驱动信号； 任一行显示单元对应的触 控驱动电极加载触摸驱动信号后， 维持触摸驱动信号直至加载上公共电压。
与现有的触摸驱动屏相比， 本发明触摸驱动屏及其驱动方法的优势主要体 现在两方面：
第一， 在现有 in cell触摸驱动屏设计中， 都是采用分时驱动来实现， 例如： 如图 8所示， 其中， 图中实线为栅极驱动信号， 虚线为触摸驱动信号， 60Hz的产 品采用分时驱动， 那么在一帧 16.7ms时间中， 12ms左右用来显示， 在 4ms时间用 来实现触摸功能， 虽然信号发生变化， 但是人眼感知不到， 故称之为分时驱动。 而本发明实施例提供的触摸驱动屏采用的不是分时驱动， 而是利用即将给像素 (显示单元）行充电前的短暂时间， 向像素 （显示单元）行对应的充当触控驱 动电极的公共电极， 输出触摸驱动信号的方式来实现， 不会对显示产生影响， 而且可以提高触摸屏的报点率。
第二，现有 in cell触摸驱动屏设计中，实现触控功能需要的触摸驱动信号（ TX 信号）和感应信号 （RX信号）都是由独立的触摸驱动芯片来实现驱动， 而本发 明实施例提供的触摸驱动屏， 采用 Tx信号由集成在阵列基板上的驱动电路输出， 在 GOA单元输出栅极扫描信号时， 驱动电路给出一个电压 （例如， 5V左右的电 压）来实现驱动， 在不输出过程中一直保持 Vcom的电压。 这样， 可减少驱动芯 片 （IC ) 的输出信号， 降低驱动芯片制作时的复杂度， 从而降低成本， 减小面 板厚度以及边框宽度。
本发明实施例提供的触摸显示屏， 在制作中传统 ADS显示屏制作不同。 在 阵列基板制作中需要将整面 ITO制作成条形 （slit状）， 以形成公共电极， 如图 3 所示。
彩膜基板制作中， 需要在黑矩阵制作前先进行触控感应电极的制作， 通常 是通过在玻璃上镀金属膜， 然后进行曝光刻蚀制作出需要的图案。
本发明可以从一定程度上减少触摸盲失的作用， 从而提高报点率。 比如， 现有技术采用分时驱动， 在实现显示功能的 12ms左右内， 要是有人在显示阶段 进行触摸， 这样可能不能进行报点， 而本发明实施例设计中这种触摸可以实现 报点。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于一计算 机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存储记忆体（Read-Only Memory, ROM )或随机存储记忆体（Random Access Memory, RAM )等。
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实施例揭露的技术范围内， 可轻 易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保 护范围应该以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种触摸显示屏， 包括彩膜基板和阵列基板， 所述彩膜基板或所述阵列 基板上设置有公共电极， 其特征在于， 所述公共电极呈条形， 所述公共电极中 的一个或多个同时充当所述触摸显示屏的触控驱动电极； 所述触摸显示屏还包 括：
驱动电路， 与充当触控驱动电极的公共电极相连， 用于向所述充当触控驱 动电极的公共电极加载触摸驱动脉沖， 并在不加载所述触摸驱动脉沖的时间内 加载公共电压。
2、 根据权利要求 1所述的触摸显示屏， 其特征在于， 所述驱动电路包括： 多个移位寄存器；
每一移位寄存器的输出端均与一条充当触控驱动电极的公共电极连接， 除第一个移位寄存器和最后一个移位寄存器外， 其余每个移位寄存器的输 出端均和与其相邻下一个移位寄存器的输入端以及与其相邻的上一个移位寄存 器的复位信号输入端连接，
第一个移位寄存器的输入端输入帧起始信号， 第一个移位寄存器的输出端 与第二个移位寄存器的输入端连接， 最后一个移位寄存器的输出端和与其相邻 的上一个移位寄存器的复位信号输入端以及自身的复位信号输入端连接，
每个移位寄存器的低电压信号输入端输入公共电压。
3、 根据权利要求 1或 2所述的触摸显示屏， 其特征在于， 还包括： 触控感应电极， 设置于所述彩膜基板上。
4、根据权利要求 1-3任一项所述的触摸显示屏， 其特征在于， 所述触摸显示 屏包括多个显示单元， 一条公共电极与一行或多行所述显示单元相对应。
5、 根据权利要求 1-4任一项所述的触摸显示屏， 其特征在于，
所述公共电极设置在所述阵列基板上。
6、 根据权利要求 1-5任一项所述的触摸显示屏， 其特征在于，
所述公共电极为狭缝电极。
7、 根据权利要求 1-6任一项所述的触摸显示屏， 其特征在于，
所述驱动电路设置于所述阵列基板上。
8、 根据权利要求 2所述的触摸显示屏， 其特征在于， 所述第一个移位寄存 器的输入端输入帧起始信号作为触控扫描启动信号。
9、 一种触摸显示屏的驱动方法， 其特征在于， 包括：
在触摸显示屏的显示单元加载显示信号之前的第一时间， 向所述显示单元 对应的触控驱动电极加载触摸驱动信号；
向所述显示单元加载显示信号， 同时向所述显示单元对应的触控驱动电极 加载公共电压。
10、 根据权利要求 9所述的驱动方法， 其特征在于， 加载一帧显示信号时， 所述驱动方法具体为：
先向触摸显示屏的第 1~K行显示单元对应的触控驱动电极，逐个加载触摸驱 动信号；
然后从触摸显示屏的第 1行显示单元开始： 当触摸显示屏的第 Ν行显示单元 加载显示信号时， 向第 Ν行显示单元对应的触控驱动电极加载公共电压， 同时向 第 Ν+Κ行显示单元对应的触控驱动电极加载触摸驱动信号， 依次类推， 直至触 摸显示屏的倒数第 Κ行显示单元加载上显示信号； 从倒数第 Κ行到最后一行显示 单元加载显示信号时， 只向所述显示单元对应的触控驱动电极加载公共电压； 其中， 第 Ν行显示单元和第 Ν+Κ行显示单元不对应同一条触控驱动电极， Ν 和 Κ均为自然数， J-N> 1 , K≥ 1。
11、 根据权利要求 9或 10所述的驱动方法， 其特征在于， 在一帧的时间里， 任一行显示单元对应的触控驱动电极加载一次触摸驱动信号。
12、 根据权利要求 9或 10所述的驱动方法， 其特征在于， 在一帧的时间里， 任一行显示单元对应的触控驱动电极加载公共电压后， 维持公共电压直至 加载上触摸驱动信号；
任一行显示单元对应的触控驱动电极加载触摸驱动信号后， 维持触摸驱动 信号直至加载上公共电压。
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