WO2017215069A1 - In-Cell触控显示面板的驱动方法，驱动电路及其设计方法 - Google Patents

In-Cell触控显示面板的驱动方法，驱动电路及其设计方法 Download PDF

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WO2017215069A1
WO2017215069A1 PCT/CN2016/090112 CN2016090112W WO2017215069A1 WO 2017215069 A1 WO2017215069 A1 WO 2017215069A1 CN 2016090112 W CN2016090112 W CN 2016090112W WO 2017215069 A1 WO2017215069 A1 WO 2017215069A1
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display panel
goa circuit
touch display
circuit
driving
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PCT/CN2016/090112
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English (en)
French (fr)
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李曼
秦杰辉
周锦杰
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武汉华星光电技术有限公司
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Priority to US15/117,455 priority Critical patent/US10324550B2/en
Publication of WO2017215069A1 publication Critical patent/WO2017215069A1/zh

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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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    • G06F30/39—Circuit design at the physical level
    • G06F30/394—Routing
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    • 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
    • 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
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Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a driving method, a driving circuit and a design method thereof for an In-Cell touch display panel.
  • touch display panels have been widely accepted and used by people, such as smart phones, tablets, etc., using touch display panels.
  • the touch display panel integrates the touch panel and the liquid crystal display panel by using the embedded touch technology, and the touch panel function is embedded in the liquid crystal display panel, so that the liquid crystal display panel has the functions of displaying and sensing the touch input at the same time.
  • the screens used in mobile phones, tablet computers, etc. are mostly capacitive touch screens integrated with display and touch functions.
  • the touch electrodes are on the liquid crystal box type (On-Cell), touch
  • the hybrid electrode has a Hybrid In-Cell in the liquid crystal cell and a full In-Cell type of the touch electrode in the liquid crystal cell, and the latter is compared with the former two technologies. It can make the display lighter and lighter.
  • the Hybrid In-Cell and the Full In-Cell touch display panel are touch display panels embedded in the liquid crystal cell (In-Cell), which have the advantages of low cost, ultra-thin, and narrow frame. It is mainly used in high-end touch products and has evolved into the main development direction of future touch technology.
  • the working principle of the liquid crystal panel is simply to place liquid crystal molecules in two parallel glass substrates, and apply driving voltage on the two glass substrates to control the rotation direction of the liquid crystal molecules to light the backlight module. Refracted to produce a picture.
  • Each pixel in the active liquid crystal display panel has a thin film transistor (TFT) whose gate is connected to a horizontal gate line, a drain is connected to a vertical data line, and a source (Source) ) is connected to the pixel electrode. Applying a sufficient voltage on the horizontal scan line causes all the TFTs on the line to be turned on. At this time, the pixel electrode on the horizontal scan line is connected to the vertical data line, thereby writing the display signal voltage on the data line.
  • TFT thin film transistor
  • the drive circuit of the horizontal scanning line is mainly used to fabricate the GOA (Array Substrate Row Drive) circuit on the substrate around the display area to complete the driving of the horizontal scanning line.
  • GOA Array Substrate Row Drive
  • FIG. 1 it is a driving timing diagram of a conventional In-Cell LCD.
  • the scanning time of one frame is 16.7 milliseconds, and the touch rate is a reporting rate of 60 Hz.
  • the small-sized LTPS (low-temperature polysilicon) LCD of the Full In-Cell architecture is used.
  • Display (display) and TP (touch) time-sharing scanning method that every time Gate scans N lines, it stops to sweep a part of TP, then Gate then scans N lines, then sweeps part of TP... so repeated until one The frame is displayed.
  • the advantage of this is that the mutual interference between the display and the TP is small.
  • FIG. 2 it is a schematic diagram of a dark line after the TP scan of the existing In-Cell LCD.
  • the display term alternates with the touch period (TP term).
  • TP term touch period
  • the Gate will always remain in the VGL (low voltage) state, and the Source will always be holding.
  • Figure 3 is a schematic diagram of the signal of the Gate of the existing In-Cell LCD during transmission.
  • the signal is distorted (the rising edge and the falling edge are both Delay), so that the insufficient thrust of the Gate signal in the N+1th row will cause the pixels of the N+1th row to be insufficient to be fully charged.
  • the brightness of the first N+1 is dark, forming a dark line.
  • FIG. 4 it is a schematic diagram of a circuit of a conventional GOA unilateral drive.
  • the existing gate drive architectures for small and medium sized LCDs are mostly single-sided GOA drives.
  • the GOA circuit 1 is connected to each horizontal scanning line, and scans the Gate of the first row, the Gate of the second row, the Gate of the Nth row, the Gate of the N+1th row, respectively, according to a preset timing.
  • an object of the present invention is to provide a driving method for an In-Cell touch display panel, which solves the problem of dark lines occurring in the existing In-Cell touch display panel due to Display and TP time-division scanning, thereby improving display quality.
  • Another object of the present invention is to provide a driving circuit for an In-Cell touch display panel, which solves the problem of dark lines occurring in the existing In-Cell touch display panel due to Display and TP time-division scanning, and improves display quality.
  • a further object of the present invention is to provide a driving circuit design method for an In-Cell touch display panel, which solves the problem of dark lines appearing in the existing In-Cell touch display panel due to Display and TP time-division scanning, and improves display quality. .
  • the present invention provides a driving method for an In-Cell touch display panel, including:
  • Step 10 The entire horizontal scan line of the touch display panel is connected to the first GOA circuit, and the first GOA circuit performs display scan according to a preset timing;
  • Step 20 After performing a touch scan according to the preset timing, follow the preset
  • the first horizontal scan line scanned next by the timing is also connected to the second GOA circuit, and the second GOA circuit performs display scan of the first horizontal scan line in synchronization with the first GOA circuit.
  • the touch display panel is a Hybrid In-Cell touch display panel.
  • the touch display panel is a Full In-Cell touch display panel.
  • the first GOA circuit and the second GOA circuit are respectively located on opposite sides of the touch display panel.
  • the thrust of the first GOA circuit and the second GOA circuit is determined in advance by simulation.
  • the present invention further provides a driving circuit for an In-Cell touch display panel, comprising: a first GOA circuit and a second GOA circuit; the first GOA circuit is connected to all horizontal scans of the touch display panel a line, and performing a display scan according to a preset timing; after performing a touch scan according to the preset timing, the first horizontal scan line scanned next according to the preset timing is further connected to the second GOA circuit And the second GOA circuit performs display scanning on the first horizontal scanning line in synchronization with the first GOA circuit.
  • the first GOA circuit and the second GOA circuit are respectively located on opposite sides of the touch display panel.
  • the thrust of the first GOA circuit and the second GOA circuit is determined in advance by simulation.
  • the present invention also provides a method for designing a driving circuit of an In-Cell touch display panel, including:
  • the horizontal scan line corresponding to the position of the dark line is designed to be synchronously driven by the first GOA circuit and the second GOA circuit, and the other scan lines are designed to be individually driven by the first GOA circuit;
  • the thrust of the first GOA circuit and the second GOA circuit is previously determined by simulation.
  • the first GOA circuit and the second GOA circuit are respectively located on opposite sides of the touch display panel.
  • the driving method, the driving circuit and the design method thereof of the In-Cell touch display panel of the present invention solve the dark line problem occurring in the touch display panel of the prior art due to the Display and TP time-division scanning, thereby improving the display quality.
  • FIG. 1 is a schematic diagram of driving timing of a conventional In-Cell LCD
  • FIG. 2 is a schematic diagram showing a dark line after the TP scan of the existing In-Cell LCD
  • FIG. 3 is a schematic diagram of signals of a Gate of a conventional In-Cell LCD during transmission
  • FIG. 4 is a schematic diagram of a circuit of a conventional GOA unilateral drive
  • FIG. 5 is a flowchart of a driving method of an In-Cell touch display panel according to the present invention.
  • FIG. 6 is a circuit diagram of a preferred embodiment of a driving circuit of an In-Cell touch display panel according to the present invention.
  • FIG. 7 is a schematic diagram of data transmission after being compensated by the driving method of the In-Cell touch display panel of the present invention.
  • FIG. 5 it is a flowchart of a driving method of an In-Cell touch display panel according to the present invention.
  • the driving method mainly includes:
  • Step 10 The entire horizontal scan line of the touch display panel is connected to the first GOA circuit, and the first GOA circuit performs display scan according to a preset timing.
  • the preset timing can be exemplified in FIG. 1 , that is, the touch scan and the time sweep of the display scan are included.
  • the touch display panel is a variety of In-Cell touch display panels, such as a Hybrid In-Cell touch display panel, or a Full In-Cell touch display panel.
  • Step 20 After performing one touch scan according to the preset timing, the first horizontal scan line scanned next according to the preset timing is further connected to the second GOA circuit, and the second GOA circuit and the first A GOA circuit synchronizes the display scan of the first horizontal scan line.
  • the thrust of the first GOA circuit and the second GOA circuit can be determined in advance by simulation, for example, by the brightness simulation of the optical portion of the touch display panel and the panel layout circuit simulation.
  • the invention starts from increasing the GOA thrust of the display line in which the dark line appears, so as to solve the phenomenon that the Gate signal is insufficiently charged due to leakage.
  • the Gate drive architecture of the existing small and medium-sized LCDs is mostly a single-sided GOA drive.
  • the present invention adopts a GOA bilateral drive for serious darkening of the leakage to increase its thrust, improve the charging capability, and thereby enhance its brightness.
  • FIG. 6 is a schematic circuit diagram of a driving circuit of a driving panel of an In-Cell touch panel according to a preferred embodiment of the present invention.
  • the driving circuit mainly includes: a GOA circuit 11 and a GOA circuit 12; the GOA circuit 11 is connected to all horizontal scanning lines of the touch display panel, and performs display scanning according to a preset timing; and each time the touch is performed according to the preset timing After scanning, the first horizontal scanning line scanned next according to the preset timing is also connected to the GOA circuit 12, and the GOA circuit 12 performs display scanning of the first horizontal scanning line in synchronization with the GOA circuit 11.
  • the GOA circuit 11 and the GOA circuit 12 are respectively located on opposite sides of the touch display panel, so that the trace design is relatively simple.
  • the display will be dark every time the TP is scanned, and the entire display will appear because the TP stops for A times.
  • A-1 dark lines if N lines are displayed each time, the positions of the A-1 dark lines are the N+1th line, the 2N+1 line... and the (A-1)N+1th line, respectively.
  • it is required to drive the two scanning lines that are stopped in the display, for example, for a 1080*1920 5-inch mobile phone screen, the TP is scanned once every 120 lines, and the total is required to be stopped 15 times, only need to be on the right side of the screen.
  • a GOA circuit 12 is added to the side to drive the 15 scan lines.
  • the invention also provides a design method of a driving circuit of an In-Cell touch display panel, which mainly comprises:
  • the horizontal scanning line corresponding to the position of the dark line is designed to be synchronously driven by the first GOA circuit and the second GOA circuit, and the other scanning lines are designed to be individually driven by the first GOA circuit.
  • the present invention makes the GOA line of the dark line of the Gate line bilaterally driven, and the other Gate lines are still driven by one side.
  • the thrust of the first GOA circuit and the second GOA circuit can be determined in advance by simulation.
  • the thrust of the GOA module for single-side drive and bilateral drive can be determined by the simulation of the brightness of the optical part and the simulation of the panel layout circuit.
  • FIG. 7 is a schematic diagram of data transmission after being compensated by the driving method of the In-Cell touch display panel of the present invention.
  • the present invention can be applied to small and medium-sized In-Cell LCD display modules to improve the dark line problem of existing In-Cell LCD modules due to Display and TP time-division scanning, and improve display quality.

Abstract

一种In-Cell触控显示面板的驱动方法，驱动电路及其设计方法。该In-Cell触控显示面板的驱动方法包括：步骤10、该触控显示面板的全部水平扫描线与第一GOA电路连接，该第一GOA电路按照预设时序进行显示扫描；步骤20、每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。该In-Cell触控显示面板的驱动方法，驱动电路及其设计方法解决现有技术中触控显示面板由于显示与触控分时扫描所出现的暗线问题，提高显示质量。

Description

In-Cell触控显示面板的驱动方法，驱动电路及其设计方法 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种In-Cell触控显示面板的驱动方法，驱动电路及其设计方法。
背景技术
随着显示技术的飞速发展，触控显示面板已经广泛地被人们所接受及使用，如智能手机、平板电脑等均使用了触控显示面板。触控显示面板采用嵌入式触控技术将触控面板和液晶显示面板结合为一体，并将触控面板功能嵌入到液晶显示面板内，使得液晶显示面板同时具备显示和感知触控输入的功能。
为了实现电子产品的轻薄化，手机、平板电脑等使用的屏幕多为集显示与触摸功能一体化的电容触摸屏，根据结构不同，具体包括触控电极在液晶盒上型(On-Cell)、触控电极在液晶盒内的混合内嵌型(Hybrid In-Cell)和触控电极在液晶盒内的全面内嵌型(Full In-Cell)三种类型，而后者相对于前面两种技术而言，能让显示屏的轻薄化程度更佳。其中，Hybrid In-Cell和Full In-Cell触控显示面板均为触控电极内嵌在液晶盒内型(In-Cell)的触控显示面板，具有成本低、超薄、和窄边框的优点，主要应用在高端触控产品中，已演化为未来触控技术的主要发展方向。
另一方面，液晶面板的工作原理简单来说是在两片平行的玻璃基板当中放置液晶分子，并在两片玻璃基板上施加驱动电压来控制液晶分子的旋转方向，以将背光模组的光线折射出来产生画面。主动式液晶显示面板中每个像素具有一个薄膜晶体管(TFT)，其栅极(Gate)连接至水平扫描线(Gate line)，漏极(Drain)连接至垂直方向的数据线，源极(Source)则连接至像素电极。在水平扫描线上施加足够的电压，会使得该条线上的所有TFT打开，此时该水平扫描线上的像素电极会与垂直方向的数据线连接，从而将数据线上的显示信号电压写入像素，控制不同液晶的透光度进而达到控制色彩的效果。目前主要采用将水平扫描线的驱动电路制作在显示区周围的基板上的GOA(阵列基板行驱动)电路来完成水平扫描线的驱动。
如图1所示，其为现有一种In-Cell LCD的驱动时序示意图，1帧(frame)的扫描时间为16.7毫秒，触控为60Hz的报点率。目前对于In-Cell LCD，例如Full In-Cell架构的中小尺寸的LTPS(低温多晶硅)的LCD，多采用 Display(显示)与TP(触控)分时驱动的扫描方式：即Gate每扫描N行，就停下来扫一部分TP，然后Gate接着再扫N行，再扫一部分TP……如此反复，直到一帧显示完毕。这样做的好处是显示和TP的相互干扰较小。
但如图2所示，其为现有In-Cell LCD的TP扫描完后出现暗线示意图。显示期(Display term)与触控期(TP term)交替，当Display停下来扫TP的这段时间内，Gate会一直Holding(维持)在VGL(低电压)的状态，Source就会一直Holding在GND(接地)的状态，这样时间长了就会引起漏电，待TP扫描完毕后，再接着扫第N+1行的Gate时，第N+1行的Gate信号就会因漏电而变成图3所示的情况，图3为现有In-Cell LCD的Gate在传输中的信号示意图。此时的信号已失真(上升沿和下降沿都Delay(延迟)严重)，如此第N+1行的Gate信号推力不足就会导致第N+1行的像素没办法充饱，在显示上就表现为第N+1的亮度偏暗，形成一条暗线。
如图4所示，其为现有GOA单边驱动的线路示意图。现有的中小尺寸的LCD的Gate驱动架构多为单边GOA驱动。GOA电路1连接至各水平扫描线，并按照预设时序分别扫描第1行的Gate，第2行的Gate，……第N行的Gate，第N+1行的Gate……。
因此，需提出一种新的驱动架构，以解决以上In-Cell触控显示面板由于Display与TP分时扫描所出现的暗线问题。
发明内容
因此，本发明的目的在于提供一种In-Cell触控显示面板的驱动方法，解决现有In-Cell触控显示面板由于Display与TP分时扫描所出现的暗线问题，提高显示质量。
本发明的又一目的在于提供一种In-Cell触控显示面板的驱动电路，解决现有In-Cell触控显示面板由于Display与TP分时扫描所出现的暗线问题，提高显示质量。
本发明的再一目的在于提供一种In-Cell触控显示面板的驱动电路的设计方法，解决现有In-Cell触控显示面板由于Display与TP分时扫描所出现的暗线问题，提高显示质量。
为实现上述目的，本发明提供了一种In-Cell触控显示面板的驱动方法，包括：
步骤10、该触控显示面板的全部水平扫描线与第一GOA电路连接，该第一GOA电路按照预设时序进行显示扫描；
步骤20、每当按照该预设时序执行完成一次触控扫描后，按照该预设 时序接下来所扫描的第一行水平扫描线还与第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。
其中，该触控显示面板为Hybrid In-Cell触控显示面板。
其中，该触控显示面板为Full In-Cell触控显示面板。
其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
其中，该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
为实现上述目的，本发明还提供了一种In-Cell触控显示面板的驱动电路，包括：第一GOA电路以及第二GOA电路；该第一GOA电路连接该触控显示面板的全部水平扫描线，并且按照预设时序进行显示扫描；每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与该第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。
其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
其中，该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
为实现上述目的，本发明还提供了一种In-Cell触控显示面板的驱动电路的设计方法，包括：
按照预设时序找出该触控显示面板的全部水平扫描线中的暗线位置；
设定光罩条件，将对应暗线位置的水平扫描线设计为由第一GOA电路和第二GOA电路同步驱动，其他扫描线设计为由该第一GOA电路单独驱动；
该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
综上，本发明In-Cell触控显示面板的驱动方法，驱动电路及其设计方法解决了现有技术中触控显示面板由于Display与TP分时扫描所出现的暗线问题，提高了显示质量。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为现有一种In-Cell LCD的驱动时序示意图；
图2为现有In-Cell LCD的TP扫描完后出现暗线示意图；
图3为现有In-Cell LCD的Gate在传输中的信号示意图；
图4为现有GOA单边驱动的线路示意图；
图5为本发明In-Cell触控显示面板的驱动方法的流程图；
图6为本发明In-Cell触控显示面板的驱动电路一较佳实施例的电路示意图；
图7为经本发明In-Cell触控显示面板的驱动方法补偿后的数据传输示意图。
具体实施方式
参见图5，其为本发明In-Cell触控显示面板的驱动方法的流程图。该驱动方法主要包括：
步骤10、该触控显示面板的全部水平扫描线与第一GOA电路连接，该第一GOA电路按照预设时序进行显示扫描。对于现有In-Cell触控显示面板来说，预设时序可以如图1所示例，即既包括触控扫描又包括显示扫描的分时扫描。在本发明中，触控显示面板为采用分时扫描方式的各种In-Cell触控显示面板，例如Hybrid In-Cell触控显示面板，或Full In-Cell触控显示面板。
步骤20、每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。
该第一GOA电路和该第二GOA电路的推力可以预先通过模拟确定，例如可由触控显示面板光学部分的亮度模拟和面板Layout(布局)电路模拟后决定。
本发明从增大出现暗线的显示行的GOA推力出发，以解决Gate信号因漏电所引起充电不足的横暗线的现象。如图4所示，现有的中小尺寸的LCD的Gate驱动架构多为单边GOA驱动，本发明对漏电严重的暗行采取GOA双边驱动，以增大其推力，提高充电能力，进而提升其亮度。
参见图6，其为本发明In-Cell触控显示面板的驱动电路一较佳实施例的电路示意图。该驱动电路主要包括：GOA电路11以及GOA电路12；GOA电路11连接该触控显示面板的全部水平扫描线，并且按照预设时序进行显示扫描；每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与GOA电路12连接，GOA电路12与GOA电路11同步对该第一行水平扫描线进行显示扫描。在此较佳实施 例中，GOA电路11和GOA电路12分别位于该触控显示面板的相对两侧，这样走线设计较为简单。
结合图6来说明，对于分时扫描的In-Cell触控显示面板来说，每当TP扫完后的第一行，显示都会偏暗，由于TP中停A次，整个显示屏就会出现A-1条暗线，若每次显示N行，则这A-1条暗线的位置分别是第N+1行、2N+1行……和第(A-1)N+1行。本发明中需要对显示中停的那几根扫描线双边驱动，比如对于1080*1920的5寸手机屏，每显示120行扫一次TP，总共就需要中停15次，只需要在屏的右侧增加一个GOA电路12去驱动这15根扫描线即可。
本发明还提供了一种In-Cell触控显示面板的驱动电路的设计方法，主要包括：
1)按照预设时序找出该触控显示面板的全部水平扫描线中的暗线位置。对于预定时序分时扫描的In-Cell触控显示面板来说，每当TP扫完后的第一行，显示都会偏暗，由于TP中停A次，整个显示屏就会出现A-1条暗线，若每次显示N行，则这A-1条暗线的位置分别是第N+1行、2N+1行……和第(A-1)N+1行。
2)设定光罩条件，将对应暗线位置的水平扫描线设计为由第一GOA电路和第二GOA电路同步驱动，其他扫描线设计为由该第一GOA电路单独驱动。相较于现有的单边驱动，本发明将出现暗线的Gate line的GOA线路做成双边驱动的，其它Gate line仍然为单边驱动。
3)该第一GOA电路和该第二GOA电路的推力可以预先通过模拟确定。关于单边驱动和双边驱动的GOA模块的推力，可由光学部分的亮度模拟和面板Layout电路模拟后决定。
参见图7，其为经本发明In-Cell触控显示面板的驱动方法补偿后的数据传输示意图。通过比较图7与图3可知，采用本发明后明显避免了信号失真，上升沿和下降沿不再延迟。本发明从增大出现暗线的显示行的GOA推力出发，以解决Gate信号因漏电所引起充电不足的横暗线的现象。通过补偿由于停下来做TP所导致的漏电而产生的暗线，最终提升显示质量。
综上所述，本发明可以应用在中小尺寸的In-Cell LCD显示模组上，以改善现有In-Cell LCD模组由于Display与TP分时扫描所出现的暗线问题，提高显示质量
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

  1. 一种In-Cell触控显示面板的驱动方法，包括：
    步骤10、该触控显示面板的全部水平扫描线与第一GOA电路连接，该第一GOA电路按照预设时序进行显示扫描；
    步骤20、每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。
  2. 如权利要求1所述的In-Cell触控显示面板的驱动方法，其中，该触控显示面板为Hybrid In-Cell触控显示面板。
  3. 如权利要求1所述的In-Cell触控显示面板的驱动方法，其中，该触控显示面板为Full In-Cell触控显示面板。
  4. 如权利要求1所述的In-Cell触控显示面板的驱动方法，其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
  5. 如权利要求1所述的In-Cell触控显示面板的驱动方法，其中，该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
  6. 一种In-Cell触控显示面板的驱动电路，包括：第一GOA电路以及第二GOA电路；该第一GOA电路连接该触控显示面板的全部水平扫描线，并且按照预设时序进行显示扫描；每当按照该预设时序执行完成一次触控扫描后，按照该预设时序接下来所扫描的第一行水平扫描线还与该第二GOA电路连接，该第二GOA电路与该第一GOA电路同步对该第一行水平扫描线进行显示扫描。
  7. 如权利要求6所述的In-Cell触控显示面板的驱动电路，其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
  8. 如权利要求6所述的In-Cell触控显示面板的驱动电路，其中，该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
  9. 一种In-Cell触控显示面板的驱动电路的设计方法，包括：
    按照预设时序找出该触控显示面板的全部水平扫描线中的暗线位置；
    设定光罩条件，将对应暗线位置的水平扫描线设计为由第一GOA电路和第二GOA电路同步驱动，其他扫描线设计为由该第一GOA电路单独驱动；
    该第一GOA电路和该第二GOA电路的推力预先通过模拟确定。
  10. 如权利要求9所述的In-Cell触控显示面板的驱动电路的设计方法， 其中，该第一GOA电路和该第二GOA电路分别位于该触控显示面板的相对两侧。
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