WO2015196648A1 - 一种内置触摸显示屏及其驱动显示方法、显示装置 - Google Patents

一种内置触摸显示屏及其驱动显示方法、显示装置 Download PDF

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Publication number
WO2015196648A1
WO2015196648A1 PCT/CN2014/088829 CN2014088829W WO2015196648A1 WO 2015196648 A1 WO2015196648 A1 WO 2015196648A1 CN 2014088829 W CN2014088829 W CN 2014088829W WO 2015196648 A1 WO2015196648 A1 WO 2015196648A1
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Prior art keywords
touch
display
screen
data
predetermined
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PCT/CN2014/088829
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English (en)
French (fr)
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马韬
李恒滨
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京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to US14/770,391 priority Critical patent/US9811190B2/en
Publication of WO2015196648A1 publication Critical patent/WO2015196648A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a built-in touch display screen, a driving display method thereof, and a display device.
  • the touch panel function is integrated with the liquid crystal panel in comparison with the conventional method of placing the touch panel on the liquid crystal panel.
  • the in-cell touch technology is one of the integration technologies of the touch panel and the liquid crystal panel, and is a method of embedding the touch panel function into the liquid crystal pixels.
  • the latest built-in touch technology enables the touch sensing electrodes, that is, the touch driving electrodes Tx and the touch sensing electrodes Rx, to be fabricated on the TFT array substrate of the liquid crystal display panel, which can save a touch glass substrate compared with the conventional capacitive touch screen structure. (touch glass), so that the entire display module is made lighter and thinner, and the circuit structure diagram of the liquid crystal display using the built-in touch technology is shown in FIG.
  • the touch driving electrode Tx and the touch sensing electrode Rx are both formed on the TFT array substrate, various parasitic capacitances and coupling capacitances exist between the electrodes of the TFT and the layers of the TFT.
  • various voltages on the TFT are alternated. The change causes crosstalk to the signals on the touch driving electrode Tx and the touch sensing electrode Rx, thereby seriously affecting the touch effect of the liquid crystal display.
  • the signal scanning of the touch driving electrode Tx and the touch sensing electrode Rx is performed in synchronization with the screen refresh.
  • the scanning method adopted by the built-in touch technology is performed in a blank interval between two frames.
  • the voltages outputted from the source driver and the gate driver to the TFT are stopped, and the driving signals are applied to the touch driving electrodes Tx and the touch sensing electrodes Rx.
  • the signal crosstalk is the weakest, but because the touch drive electrode Tx line is shared with the Vcom line, the amount of charge on the parasitic and coupling capacitors can crosstalk the signal.
  • FIG. 2 the working flow chart of the built-in touch screen display driver is shown in FIG. 2: when the touch control integrated circuit (IC) performs the initial scan, the liquid crystal panel has not been driven, and the parasitic capacitance Cs is The amount of charge is zero; then after completing the writing of the last row of data of each frame, the touch control integrated circuit performs scanning, and compares the scanned data with the data obtained during the initial scan to determine whether it occurs. Touch behavior. As shown in FIG. 3 and FIG. 4, by graphically comparing the result of the comparison data of the touch control integrated circuit, it is found that due to the influence of the charge on the parasitic capacitance Cs, even when the touch behavior does not occur, the picture changes (as shown in the figure). 3A, FIG. 3B and FIG. 4A, FIG. 4B), the result of the comparison data of the touch control integrated circuit will also change, as shown in FIG. 3C and FIG. 4C, which may lead to misjudgment.
  • IC touch control integrated circuit
  • the present invention provides a built-in touch display screen, a driving display method thereof, and a display device.
  • the present invention ensures that the display screen displays the same picture (ie, a special picture) when scanning the touch sensing electrodes by inserting a special picture between the normal display and every two frames of the display screen, thereby avoiding parasitic and coupling capacitance pairs.
  • the effect of the touch sensing electrode scan results.
  • the present invention also performs backlight control while displaying a special picture.
  • a driving display method of a built-in touch display screen comprising the following steps:
  • the display scan data is compared with the base data to determine whether a touch behavior has occurred.
  • the predetermined picture is a picture such that the crosstalk of the parasitic capacitance and the voltage on the coupling capacitor to the touch signal is small
  • the parasitic capacitance is a parasitic capacitance between the touch sensing electrode and the common electrode in the TFT array substrate
  • the coupling capacitor is a coupling capacitance between the touch sensing electrode and a common electrode in the TFT array substrate.
  • the predetermined picture is a pure black or pure white picture.
  • the predetermined picture is outputted by means of writing data in multiple lines simultaneously.
  • the method further includes controlling the backlight when outputting the display screen and the predetermined screen.
  • controlling the backlight includes: turning on or off the backlight or adjusting the brightness of the backlight.
  • the method also includes initializing the timing controller prior to outputting the predetermined picture.
  • a built-in touch display screen that utilizes the drive display method for driving display.
  • a display device comprising a built-in touch display screen as described above.
  • the present invention can avoid the influence of parasitic and coupling capacitance on the scan result of the touch control integrated circuit, thereby reducing the possibility of misjudgment of the touch behavior.
  • FIG. 1 is a schematic diagram of a circuit structure of a conventional liquid crystal display using a built-in touch technology
  • FIG. 3 is a schematic diagram showing the relationship between the scan result of the touch control integrated circuit and the screen display content when there is no touch behavior according to the prior art
  • FIG. 4 is another schematic diagram of a relationship between a scan result of a touch control integrated circuit and a display content of a screen when there is no touch behavior according to the prior art
  • FIG. 5 is a flowchart of a driving method of a built-in touch display screen according to an exemplary embodiment of the present invention
  • FIG. 6 is a flowchart of a driving method of an ADS mode-based built-in touch display according to another exemplary embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a drive system with a built-in touch display screen according to an exemplary embodiment of the present invention.
  • FIG. 5 is a flowchart of a driving display method of a built-in touch display screen according to an exemplary embodiment of the present invention.
  • the timing controller is initialized.
  • the timing start controller controls the operation start sequence of the drivers such as the data driver, the touch controller, and the backlight controller, so the timing controller is first initialized.
  • a predetermined picture is output under the control of the timing controller.
  • the predetermined picture is such that parasitic capacitance between the touch sensing electrode (touch driving electrode/touch sensing electrode) and the common electrode in the TFT array substrate and between the touch sensing electrode and the common electrode in the TFT array substrate A picture in which the voltage across the coupling capacitor is less crosstalk to the touch signal.
  • the capacitive built-in touch display screen displays a predetermined picture
  • the parasitic capacitance and the coupling capacitance do not cause crosstalk or crosstalk to the touch signal
  • the predetermined picture includes, but is not limited to, pure black, pure white, and the like. But it is best to have a solid color picture.
  • a method of simultaneously writing data in multiple lines may be employed to shorten the writing time of the predetermined screen.
  • an initial scan is performed on the touch sensing electrodes in the TFT array substrate to obtain initial scan data, and the initialization scan data is used as basic data for determining whether a touch behavior occurs.
  • the capacitive built-in touch display screen displays a predetermined screen.
  • the display screen and the predetermined screen are alternately output, and after each predetermined screen is output, the touch sensing electrodes are scanned to obtain display scan data.
  • step 504 the predetermined image is inserted and outputted between every two frames of the screen to ensure that the capacitive built-in touch display screen displays the same picture (ie, a predetermined picture) each time the touch sensing electrode is scanned. Therefore, the influence of parasitic capacitance and coupling capacitance on the scanning result is avoided.
  • the display scan data is compared with the base data to determine whether a touch behavior has occurred, thereby completing the touch and display drive of the capacitive built-in touch display screen.
  • backlight control is performed on both the output display screen and the predetermined picture, wherein the control of the backlight includes, but is not limited to, opening and closing Control operations such as backlighting and adjusting backlight brightness.
  • the backlight is turned off while the predetermined screen is displayed, thereby avoiding the influence of displaying the predetermined screen on the visual effect.
  • the present invention will be further explained and explained by taking a built-in touch display screen based on the normally black display mode of ADS (Advanced Superdimensional Field Switch) as an example.
  • ADS Advanced Superdimensional Field Switch
  • FIG. 6 is a flowchart of a driving method of a built-in touch display screen based on an ADS mode according to another embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a driving system with a built-in touch display screen according to another exemplary embodiment of the present invention.
  • this embodiment selects a black screen as a predetermined screen.
  • the drive display method comprises the following steps:
  • the data driver outputs a black screen, and at this time, the backlight driver turns off the backlight to be suitable for displaying the black screen;
  • the data driver outputs a first frame display screen, and the backlight driver turns on the backlight to be suitable for outputting the display screen, and the built-in touch display screen displays One frame display screen;
  • the backlight driver then turns off the backlight, and the timing controller controls the data driver to output a black picture
  • the scanning of the touch sensing electrodes is triggered, and the data obtained by the scanning at this time is compared with the basic data to determine whether a touch behavior occurs.
  • the timing controller again controls the data driver to output the second frame display screen, and the backlight driver turns back the backlight, and the built-in touch display screen displays the second frame display screen;
  • the timing controller controls the data driver to output a black screen, and when the data driver completes writing of the last line of black screen data, triggers scanning of the touch sensing electrode, and then Comparing the scanned data with the basic data, and determining whether a touch behavior occurs;
  • the display screen and the black screen are alternately output according to the above steps, and are performed each time a black screen is output.
  • the touch action is judged to realize the touch and display drive of the built-in touch display.
  • the black screen is a solid color screen
  • multiple lines can be simultaneously written, thereby increasing the writing speed of the screen and ensuring more The time is used for scanning the touch sensing electrodes.
  • the present invention ensures that the display screen displays the same picture when the touch signal is scanned by the touch sensing electrode before the normal display and every two frames of the display screen are inserted, thereby avoiding the TFT array substrate. Crosstalk caused by various voltages on the touch signal as the picture changes alternately. At the same time, in order to avoid the influence of displaying a special picture on the visual effect, the present invention also performs backlight control while displaying a special picture. According to another aspect of the present invention, there is also provided a built-in touch display screen that performs drive display using the drive display method described in any of the above embodiments.
  • a display device comprising a built-in touch display screen as described above.

Abstract

一种内置触摸显示屏及其显示装置、驱动显示方法，该方法包括：输出预定画面（502）；对于触摸传感电极进行初始化扫描以得到初始化扫描数据，作为基础数据（503）；交替地输出显示画面和预定画面，并且在每次输出预定画面之后，对触摸传感电极进行扫描得到显示扫描数据（504）；将显示扫描数据与基础数据进行比对来判断是否发生触摸行为（505）。通过在正常显示之前以及每两帧显示画面之间插入预定画面，并在每次预定画面显示之后进行触摸扫描，来避免寄生和耦合电容对于触摸控制集成电路扫描结果的影响，从而减小触摸行为误判断的可能。

Description

一种内置触摸显示屏及其驱动显示方法、显示装置 技术领域
本发明涉及显示技术领域，尤其是一种内置触摸显示屏及其驱动显示方法、显示装置。
背景技术
目前制造商和用户对于电子产品等触摸显示面板的薄型化和轻量化的需求越来越强烈，因此，相对于将触摸面板设置在液晶面板上使用的传统方法，将触摸面板功能与液晶面板一体化的研究日渐盛行。内置(in-cell)触摸技术是触摸面板与液晶面板一体化技术中的一种，是一种将触摸面板功能嵌入到液晶像素中的方法。
最新的内置触摸技术将触摸传感电极，即触摸驱动电极Tx和触摸感应电极Rx，制作在液晶显示面板的TFT阵列基板上，相较传统的电容触摸屏结构，该技术可以节省一张触摸玻璃基板(touch glass)，从而将整个显示模组制作得更轻薄，使用内置触摸技术的液晶显示屏的电路结构示意图如图1所示。
但是由于触摸驱动电极Tx和触摸感应电极Rx均制作在TFT阵列基板上，其与TFT的各层电极之间存在各种寄生电容和耦合电容，当显示屏工作时，TFT上各种电压的交替变化会对触摸驱动电极Tx和触摸感应电极Rx上的信号产生串扰，从而严重影响液晶显示屏的触摸效果。
另外，由于传统的电容触摸屏不受TFT驱动信号的影响，因此触摸驱动电极Tx和触摸感应电极Rx的信号扫描与画面刷新同步进行。而目前内置触摸技术采用的扫描方式是在两帧画面之间的空白区间进行，这时源驱动器和门驱动器向TFT输出的电压均停止变化，驱动信号对触摸驱动电极Tx和触摸感应电极Rx上的信号串扰最弱，但因为触摸驱动电极Tx线与Vcom线共用，寄生和耦合电容上的电荷量会对信号产生串扰。
目前内置触摸显示屏驱动的工作流程图如图2所示：在触摸(Touch)控制集成电路(IC)进行初始化扫描的时候，液晶面板尚未被驱动，寄生电容Cs上的 电荷量为零；然后在完成对每一帧画面的最后一行数据的写入之后，触摸控制集成电路进行扫描，并将扫描所得的数据与初始化扫描时所得的数据进行比对，从而判断是否发生触摸行为。如图3和图4所示，将触摸控制集成电路的比对数据结果图形化，则会发现，由于寄生电容Cs上电荷的影响，即使在未发生触摸行为时，因为画面的变化(如图3A、图3B和图4A、图4B所示)，触摸控制集成电路的比对数据结果也将发生变化，如图3C和图4C所示，这样就会导致误判断。
发明内容
为了解决上述现有技术存在的问题，本发明提出一种内置触摸显示屏及其驱动显示方法、显示装置。本发明通过在正常显示之前及每两帧显示画面之间插入特殊画面，来确保对触摸传感电极进行扫描时显示屏显示的是同一画面(即，特殊画面)，从而避免寄生和耦合电容对触摸传感电极扫描结果的影响。同时，为了避免显示特殊画面对于视觉效果的影响，本发明在显示特殊画面的同时还进行背光控制。
根据本发明的一方面，提出一种内置触摸显示屏的驱动显示方法，该方法包括以下步骤：
输出预定画面；
对TFT阵列基板中的触摸传感电极进行初始化扫描以得到初始化扫描数据，作为基础数据；
交替地输出显示画面和所述预定画面，在每次输出所述预定画面之后，对触摸传感电极进行扫描以得到显示扫描数据；
将所述显示扫描数据与所述基础数据进行比对来判断是否发生触摸行为。
其中，所述预定画面为使得寄生电容和耦合电容上的电压对触摸信号的串扰较小的画面，其中，所述寄生电容为触摸传感电极与TFT阵列基板中的公共电极之间的寄生电容，所述耦合电容为触摸传感电极与TFT阵列基板中的公共电极之间的耦合电容。
其中，所述预定画面为纯黑色或纯白色画面。
其中，采用多行同时写入数据的方式输出所述预定画面。
所述方法还包括：在输出显示画面和预定画面时，对背光进行控制。
其中，对背光进行控制包括：开启、关闭背光或调节背光的亮度。
其中，当所述显示扫描数据与所述基础数据之间的差值大于预定阈值时，则判断发生了触摸行为。
所述方法还包括：在输出预定画面之前，对时序控制器进行初始化。
根据本发明的另一方面，还提出一种内置触摸显示屏，所述内置触摸显示屏利用所述驱动显示方法进行驱动显示。
根据本发明的再一方面，还提出一种显示装置，所述显示装置包括如上所述的内置触摸显示屏。
采用上述技术方案，本发明能够避免寄生和耦合电容对触摸控制集成电路扫描结果的影响，从而减小触摸行为误判断的可能。
附图说明
图1是现有的使用内置触摸技术的液晶显示屏的电路结构示意图；
图2是现有的内置触摸液晶显示屏驱动的工作流程图；
图3是根据现有技术的无触摸行为时触摸控制集成电路扫描结果与画面显示内容的关系示意图；
图4是根据现有技术的无触摸行为时触摸控制集成电路扫描结果与画面显示内容的关系另一示意图；
图5是根据本发明示例实施例的内置触摸显示屏的驱动方法流程图；
图6是根据本发明另一示例实施例的基于ADS模式的内置触摸显示器的驱动方法的流程图；以及
图7是根据本发明示例实施例的内置触摸显示屏的驱动系统结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护 的范围。
图5是根据本发明示例实施例的内置触摸显示屏的驱动显示方法流程图。
在步骤501处，对时序控制器进行初始化。在电容式内置触摸显示屏的驱动显示过程中，通过时序控制器来控制数据驱动器、触摸控制器以及背光控制器等驱动器的动作启动顺序，因此首先对时序控制器进行初始化。
在步骤502处，在时序控制器的控制下，输出预定画面。
优选地，该预定画面是使得触摸传感电极(触摸驱动电极/触摸感应电极)与TFT阵列基板中的公共电极之间的寄生电容和触摸传感电极与TFT阵列基板中的公共电极之间的耦合电容上的电压对触摸信号的串扰较小的画面。换句话说，当电容式内置触摸显示屏显示预定画面时，寄生电容及耦合电容对触摸信号不会产生串扰或者产生的串扰较小，该预定画面包括但不限于纯黑色、纯白色等画面，但最好是纯色画面。
在本发明一实施例中，在进行预定画面显示驱动时，可以采用多行同时写入数据的方式，以缩短预定画面的写入时间。
在步骤503处，对TFT阵列基板中的触摸传感电极进行初始化扫描，以得到初始化扫描数据，将初始化扫描数据作为后续用于判断是否发生触摸行为的基础数据。
需要强调的是，在对触摸传感电极进行初始化扫描时，电容式内置触摸显示屏显示的是预定画面。
在步骤504处，交替地输出显示画面和预定画面，并且在每次输出预定画面之后，对触摸传感电极进行扫描以得到显示扫描数据。
在步骤504中，在每两帧画面之间插入输出所述预定画面是为了确保在每次对触摸传感电极进行扫描时，电容式内置触摸显示屏显示的是同一画面(即，预定画面)，从而避免了寄生电容和耦合电容对扫描结果的影响。
在步骤505处，将显示扫描数据与基础数据进行比对来判断是否发生触摸行为，从而完成所述电容式内置触摸显示屏的触摸和显示驱动。
当显示扫描数据与基础数据之间的差值大于预定阈值时，就判断发生了触摸行为。
为了避免在显示预定画面时对视觉效果产生不利的影响，在输出显示画面和预定画面时均进行背光控制，其中，对背光进行的控制包括但不限于打开、关闭 背光和调节背光亮度等控制操作。例如，在显示预定画面的同时关闭背光，从而避免显示预定画面对视觉效果产生影响。
接下来参照图6和图7，以基于ADS(高级超维场开关)的常黑显示模式的内置触摸显示屏为例对本发明进行进一步的解释和说明。
图6是根据本发明另一实施例的基于ADS模式的内置触摸显示屏的驱动方法的流程图；以及图7是根据本发明另一示例实施例的内置触摸显示屏的驱动系统结构示意图。
对于常黑显示模式，本实施例选用黑色画面作为预定画面。根据该实施例，该驱动显示方法包括以下步骤：
首先，对时序控制器进行初始化；
然后，在所述时序控制器的控制下，数据驱动器输出黑色画面，此时所述背光驱动器关闭背光，以适于显示所述黑色画面；
对触摸传感电极进行初始化扫描，即扫描触摸传感电极的信号以得到初始化扫描数据作为基础数据；
然后，在所述时序控制器的控制下，数据驱动器输出第一帧显示画面，同时所述背光驱动器开启背光，以适于输出所述显示画面，此时所述内置触摸显示屏显示的是第一帧显示画面；
随后所述背光驱动器关闭背光，而所述时序控制器控制数据驱动器输出黑色画面；
在数据驱动器完成最后一行黑色画面数据的写入之后，触发对触摸传感电极的扫描，将此时扫描得到的数据与所述基础数据进行比对，来判断是否发生触摸行为。
接着，所述时序控制器再次控制所述数据驱动器输出第二帧显示画面，同时所述背光驱动器重新开启背光，此时所述内置触摸显示屏显示的是第二帧显示画面；
然后，背光驱动器关闭背光，所述时序控制器控制所述数据驱动器输出黑色画面，当所述数据驱动器完成最后一行黑色画面数据的写入后，触发对触摸传感电极的扫描，再将此时扫描得到的数据与所述基础数据进行比对，并判断是否发生触摸行为；
按照上述步骤交替地输出显示画面和黑色画面，在每次输出黑色画面时进行 触摸动作的判断，实现内置触摸显示屏的触摸和显示驱动。
因黑色画面为纯色画面，因此，在写入黑色画面时，可以不采用传统的逐行写入的模式，而是开启多行同时进行写入，从而提高画面的写入速度，确保有更多的时间用于触摸传感电极的扫描。
根据上述技术方案，本发明通过在正常显示之前及每两帧显示画面之间插入特殊画面，来确保对触摸传感电极进行触摸信号的扫描时显示屏显示的是同一画面，从而避免TFT阵列基板上各种电压随着画面的交替变化对触摸信号产生的串扰。同时，为了避免显示特殊画面对于视觉效果的影响，本发明在显示特殊画面的同时还进行背光控制。根据本发明的另一方面，还提出一种内置触摸显示屏，所述内置触摸显示屏利用上述任一实施例所述的驱动显示方法进行驱动显示。
根据本发明的再一方面，还提出一种显示装置，所述显示装置包括如上所述的内置触摸显示屏。
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种内置触摸显示屏的驱动显示方法，包括：
    输出预定画面；
    对TFT阵列基板中的触摸传感电极进行初始化扫描以得到初始化扫描数据，作为基础数据；
    交替地输出显示画面和所述预定画面，并且在每次输出所述预定画面之后，对触摸传感电极进行扫描以得到显示扫描数据；
    将所述显示扫描数据与所述基础数据进行比对来判断是否发生触摸行为。
  2. 根据权利要求1所述的方法，其中，所述预定画面为使得寄生电容和耦合电容上的电压对触摸信号的串扰较小的画面，其中，所述寄生电容为触摸传感电极与TFT阵列基板中的公共电极之间的寄生电容，所述耦合电容为触摸传感电极与TFT阵列基板中的公共电极之间的耦合电容。
  3. 根据权利要求1所述的方法，其中，所述预定画面为纯黑色或纯白色画面。
  4. 根据权利要求1所述的方法，其中，采用多行同时写入数据的方式输出所述预定画面。
  5. 根据权利要求1所述的方法，还包括：在输出显示画面和预定画面时，对背光进行控制。
  6. 根据权利要求5所述的方法，其中，对背光进行控制包括：开启、关闭背光或调节背光的亮度。
  7. 根据权利要求1所述的方法，其中，当所述显示扫描数据与所述基础数据之间的差值大于预定阈值时，判断发生了触摸行为。
  8. 根据权利要求1所述的方法，还包括：在输出预定画面之前，对时序控制器进行初始化。
  9. 一种内置触摸显示屏，利用如权利要求1-8任一项所述的驱动显示方法进行驱动显示。
  10. 一种显示装置，包括如权利要求9所述的内置触摸显示屏。
PCT/CN2014/088829 2014-06-26 2014-10-17 一种内置触摸显示屏及其驱动显示方法、显示装置 WO2015196648A1 (zh)

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