WO2015149472A1 - 检测触摸屏上的触摸的检测方法和系统、以及触摸显示装置 - Google Patents

检测触摸屏上的触摸的检测方法和系统、以及触摸显示装置 Download PDF

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Publication number
WO2015149472A1
WO2015149472A1 PCT/CN2014/085120 CN2014085120W WO2015149472A1 WO 2015149472 A1 WO2015149472 A1 WO 2015149472A1 CN 2014085120 W CN2014085120 W CN 2014085120W WO 2015149472 A1 WO2015149472 A1 WO 2015149472A1
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Prior art keywords
touch
voltage waveform
correction data
waveform data
gray
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PCT/CN2014/085120
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English (en)
French (fr)
Inventor
马韬
李恒滨
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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Priority to US14/437,116 priority Critical patent/US20160246429A1/en
Publication of WO2015149472A1 publication Critical patent/WO2015149472A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a detection method and system for detecting a touch on a touch screen, and a touch display device using the system. Background technique
  • the in-cell capacitive touch screen of the prior art can eliminate a touch substrate and make the entire display module lighter and thinner.
  • the structure of the liquid crystal display of the in-cell touch technology is as shown in FIG. 1.
  • the touch driving electrode Tx and the touch sensing electrode Rx are formed on the glass substrate on the array substrate side of the liquid crystal display panel, wherein the touch driving electrode line In common with the common electrode (Vcom) line, the touch drive electrode and the touch sensing electrode of the in-cell capacitive touch screen generate various parasitic capacitances and coupling capacitances with the thin film transistor (TFT) display device.
  • Vcom common electrode
  • TFT thin film transistor
  • Gatel, Gate2, and Gate n represent the gate scan lines of each row of pixels
  • Data1, Data2, and Datan represent the data scan lines of each column of pixels
  • C LC represents the capacitance between the liquid crystal display panels
  • Cs represents the storage capacitor.
  • the driving method of the current in-cell touch technology is time-division driving, that is, touching in a blank area between two frames.
  • the touch is performed, the voltages outputted from the source driver and the gate driver to the TFTs are stopped. At this time, the signal crosstalk of the driving signal to the touch driving electrode Tx and the touch sensing electrode Rx is the weakest.
  • the working flow chart of the embedded LCD driver is shown in Figure 2. Wherein, when the touch control integrated circuit (IC) is initially scanned, the liquid crystal panel is not driven, and the amount of charge on the storage capacitor Cs is zero. After the gate signal input of the last row of each frame is completed, the touch control integrated circuit will scan and compare the obtained data with the data obtained during the initial scan to determine whether a touch has occurred.
  • the touch control integrated circuit performs scanning, due to the touch drive
  • the moving electrode Tx line is shared with the common electrode Vcom line, and the amount of charge on the storage capacitor Cs and other parasitic and coupling capacitors crosstalks the signal, so that even when no touch occurs, the touch control is integrated due to the change of the screen at this time.
  • the result of the data comparison of the circuit also changes, resulting in misjudgment.
  • the liquid crystal display of the in-cell touch technology of the prior art cannot accurately determine whether the liquid crystal display has a touch.
  • a detecting method and system for detecting whether a touch screen is touched and a touch display device using the same for accurately detecting whether a touch screen is touched.
  • a touch screen touch detection method includes: controlling a touch screen to output a frame image, and using a correspondence relationship between each gray scale and the correction data under the gray scale;
  • the gray scale of each sub-pixel region in the image is converted into correction data corresponding to the gray scale, and the obtained correction data is composed into a modified data table, and the modified data table includes correspondence between each sub-pixel region and the correction data in the image.
  • Determining a sub-pixel region corresponding to the position coordinate, determining correction data corresponding to the sub-pixel region by searching the correction data table, and correcting voltage waveform data corresponding to the voltage signal by using the correction data, according to the corrected voltage waveform The data determines whether the touch screen is touched.
  • a method for detecting a touch on a touch screen wherein the touch scan signal is output to the touch driving electrode line by, for example, a touch controller, and the touch sensing electrode line is coupled through the touch sensing electrode line.
  • a voltage signal outputted by the touch scan signal on the touch driving electrode line And determining a position coordinate on the touch screen corresponding to the voltage signal according to the voltage signal, and determining, by the touch controller, a sub-pixel area corresponding to the touch screen position coordinate, and determining the sub-pixel by searching the correction data table Correction data corresponding to the region, and correcting the voltage waveform data corresponding to the voltage signal by using the correction data, and determining whether the touch screen is touched according to the corrected voltage waveform data. Therefore, the touch on the touch screen provided by the embodiment of the present invention
  • the detection method can accurately detect whether the touch screen is touched, and effectively avoids the influence of the level of the TFT on the crosstalk of the touch signal caused by the change of the screen.
  • the method further includes the step of pre-establishing a correspondence between each gray level and the correction data under the gray level, the step comprising:
  • the preset image is output by controlling the touch screen
  • the touch controller outputs a preset touch scan signal to the touch driving electrode line, and receives the specific sub-pixel area output by the touch sensing electrode line through the preset touch scan signal coupled to the touch driving electrode line.
  • Corresponding reference voltage signal and converting the reference voltage signal into reference voltage waveform data, and using the reference voltage waveform data as reference data;
  • Each of the grayscale voltages of each grayscale is used to drive a specific sub-pixel of the touch screen, wherein the touch controller outputs a touch scan signal of each grayscale to the touch driving electrode line, and receives the touch sensing electrode line.
  • the specific sub-pixel region corresponding to each gray scale is obtained by coupling a gray scale voltage signal of the specific sub-pixel region output by the touch scan signal of each gray scale on the touch driving electrode line. Gray scale voltage signal;
  • the preset image is a black image or a white image.
  • the preset image is a black image or a white image, it is more convenient and simple in practical applications.
  • the step of correcting voltage waveform data corresponding to the voltage signal by using the correction data comprises: subtracting, corresponding to the position coordinates, voltage waveform data corresponding to the voltage signal
  • the correction data of the sub-pixel area is subjected to a difference, and the difference is used as the corrected voltage waveform data.
  • the touch controller subtracts the correction data of the sub-pixel region corresponding to the position coordinate from the voltage waveform data corresponding to the voltage signal, and obtains the difference as the corrected voltage waveform data in the actual detection process. It is more convenient and simpler.
  • the step of determining whether the touch screen is touched according to the corrected voltage waveform data comprises:
  • the corrected voltage waveform data is greater than the preset standard data, it is determined that the touch screen is touched.
  • the corrected voltage waveform data is greater than the preset standard data, it is determined that the touch screen is touched, which is more accurate and convenient in the actual detection process.
  • an embodiment of the present invention further provides a detection system for detecting a touch on a touch screen, the system comprising a timing controller and a touch controller, wherein:
  • the timing controller is configured to control the touch screen to output a frame image, and convert the gray scale of each sub-pixel region in the image into a corresponding gray scale by using a correspondence relationship between each gray scale and the correction data under the gray scale.
  • the correction data is formed, and the obtained correction data is composed into a correction data table, and the correction data table includes a correspondence relationship between each sub-pixel region in the image and the correction data;
  • the touch controller is configured to output a touch scan signal to the touch driving electrode line, and receive a voltage signal output by the touch sensing electrode line through a touch scan signal coupled to the touch driving electrode line, the voltage
  • the signal is used to determine a position coordinate of a touch position that the touch screen may be touched;
  • the touch controller is further configured to determine a sub-pixel area corresponding to the position coordinate, and determine the corresponding sub-pixel area by searching the correction data table.
  • the data is corrected, and the voltage waveform data corresponding to the voltage signal is corrected by the correction data, and whether the touch screen is touched is determined based on the corrected voltage waveform data.
  • the touch controller is configured to output a touch scan signal to the touch drive electrode line, and receive the touch sense electrode line to perform touch scan on the touch drive electrode line.
  • a voltage signal outputted by the signal the voltage signal is used to determine a position coordinate of a touch position at which the touch screen may be touched; and the touch controller is further configured to determine a sub-pixel area corresponding to the position coordinate, by searching for the The correction data table determines the correction data corresponding to the sub-pixel region, and corrects the voltage waveform data corresponding to the voltage signal by using the correction data, and determines whether the touch screen is touched according to the corrected voltage waveform data. Therefore, the embodiment of the present invention provides The touch screen touch detection system can accurately detect whether the touch screen is touched, and effectively avoids the influence of the level on the TFT on the crosstalk of the touch signal.
  • the timing controller is further configured to control the touch screen to output a preset image after the initialization is completed; and the touch controller is further configured to output a preset touch scan signal to the touch driving electrode line, and receive the touch sensing electrode
  • the line is coupled to the reference voltage signal corresponding to the specific sub-pixel region output by the preset touch scan signal on the touch driving electrode line, and converts the reference voltage signal into reference voltage waveform data, and the reference voltage waveform data is As a reference data
  • the touch controller is further configured to drive a specific sub-pixel of the touch screen by using a gray scale voltage of each gray scale, wherein the touch controller outputs a touch scan signal of each gray scale to Touching the driving electrode line, and receiving the gray-scale voltage signal of the specific sub-pixel region output by the touch-sensing electrode line through the touch scanning signal of each gray-scale coupled to the touch driving electrode line, thereby obtaining a gray scale voltage signal of the specific sub-pixel region corresponding to each gray scale; the touch controller further includes the specific corresponding to each gray scale
  • the touch controller when the voltage waveform data corresponding to the voltage signal is corrected by using the correction data, the touch controller subtracts the position corresponding to the position coordinate by using voltage waveform data corresponding to the voltage signal.
  • the correction data of the sub-pixel area is obtained as a difference, and the difference is used as the corrected voltage waveform data.
  • the touch controller is specifically configured to subtract the correction data of the sub-pixel region corresponding to the position coordinate from the voltage waveform data corresponding to the voltage signal, and use the difference as the corrected voltage waveform data in the actual detection process. More convenient and simple.
  • the touch controller determines that the touch screen is touched.
  • the touch controller is specifically used to determine that the touch screen is touched, it is more accurate in the actual detection process.
  • a touch display device comprising the touch detection system described above.
  • the touch display device provided by the embodiment of the present invention since the device includes the touch detection system described above, the touch display device provided by the embodiment of the present invention can accurately detect the touch condition, thereby effectively avoiding the level on the TFT. The effect of changes on the crosstalk of the touch signal.
  • FIG. 1 is a schematic diagram of a liquid crystal display based on an in-cell touch technology in the prior art
  • FIG. 3 is a flow chart of a touch screen touch detection method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a pixel structure of a liquid crystal panel according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a touch screen touch detection system according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing the internal structure of a timing controller according to an embodiment of the present invention
  • 7 is a system block diagram of a liquid crystal display based on an in-cell touch technology in accordance with an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION A touch display device is provided.
  • FIG. 3 is a flow chart showing a method for detecting a touch screen touch, the method comprising:
  • the timing controller controls the touch screen to output a frame image, and converts the gray scale of each sub-pixel region in the image into a corresponding gray scale by using a correspondence relationship between each gray scale and the correction data under the gray scale.
  • Correction data, and the obtained correction data is composed into a correction data table, and the correction data table includes a correspondence relationship between each sub-pixel region and the correction data in the image;
  • the touch controller outputs a touch scan signal to the touch driving electrode line, and receives a voltage signal output by the touch sensing electrode line coupled to the touch scan signal on the touch driving electrode line, the voltage signal Position coordinates for determining a touch position at which the touch screen may be touched;
  • the touch controller determines a sub-pixel region corresponding to the position coordinate, determines correction data corresponding to the sub-pixel region by searching the correction data table, and corrects voltage waveform data corresponding to the voltage signal by using the correction data, Whether the touch screen is touched is determined based on the corrected voltage waveform data.
  • a specific embodiment of the present invention is described by taking an in-line liquid crystal display panel of an Advanced Super Dimension Switch (ADS) mode (ie, a normally black mode) as an example.
  • ADS Advanced Super Dimension Switch
  • the touch screen in the specific embodiment of the present invention is exemplified by an in-cell capacitive touch liquid crystal display.
  • a specific embodiment of the present invention is described by taking an 8-bit color depth liquid crystal display panel as an example.
  • the 8-bit liquid crystal display panel has a total of 256 gray scales, and each gray scale corresponds to a positive gray scale (Gamma) voltage and a negative gray scale voltage.
  • the ADS liquid crystal display panel has a constant voltage Vcom as a common electrode voltage.
  • Vcom the gray scale voltage
  • the gray scale voltage is called gray.
  • the step voltage when the gray scale voltage in the liquid crystal display panel is lower than the common electrode voltage Vcom, the gray scale voltage is referred to as a negative gray scale voltage.
  • a corresponding set of positive/negative gray scale voltages can drive the liquid crystal molecules to obtain a corresponding gray scale.
  • the gray scale corresponding to each set of gray scale voltages affects the touch detection, and has nothing to do with the positive and negative polarities of the gray scale voltage.
  • the timing controller controls the touch screen to output a preset image.
  • the touch controller outputs a touch scan signal to the touch driving electrode line, and receives the corresponding touch sub-pixel area output by the touch sensing electrode line through the touch scan signal coupled to the touch driving electrode line.
  • the voltage signal converts the received voltage signal into voltage waveform data, and then saves the voltage waveform data as reference data to the touch controller.
  • the preset image may be a black image or a white image.
  • the preset image may be set as an image of another color according to an actual detection situation.
  • the preset image in the specific embodiment of the present invention is illustrated by taking a black image as an example.
  • a particular sub-pixel region of the touch screen is driven with a gray scale voltage of each gray scale, respectively.
  • the touch controller outputs a touch scan signal to the touch driving electrode line, and receives a voltage signal of the specific sub-pixel region output by the touch sensing electrode line through the touch scan signal coupled to the touch driving electrode line. Thereby obtaining a voltage signal of the specific sub-pixel region corresponding to each gray scale.
  • the touch controller converts the voltage signal of the specific sub-pixel region corresponding to each gray scale into corresponding voltage waveform data.
  • the difference between the voltage waveform data and the reference data is used as the correction data under the gray scale corresponding to the voltage waveform data, thereby establishing between each gray level and the correction data under the gray level.
  • Correspondence Since an 8-bit liquid crystal display panel is used in the specific embodiment of the present invention, a total of 256 correspondences can be obtained, as shown in Table 1. The resulting correspondence is then saved to the timing controller. In the actual test, the correspondence of Table 1 can be obtained by simulation and a large number of tests, such as the specific oscilloscope can be used for testing.
  • the liquid crystal display panel has a resolution of 3x3.
  • the initialization of the system side and the timing controller is first performed, and then the timing controller controls the touch screen to output a black image.
  • the touch controller scans the output black image.
  • the touch controller outputs a touch scan signal to the touch driving electrode line, and receives the specific sub-pixel area output by the touch sensing electrode line through the touch scan signal coupled to the touch driving electrode line.
  • the timing controller receives the data signal outputted by the system, controls the touch screen to output a frame image, and uses the pre-established correspondence between each gray scale and the correction data under the gray scale to gray the color of each sub-pixel region in the image.
  • the order is converted into correction data corresponding to the gray scale, and the obtained correction data is composed into a correction data table, and the correction data table includes a correspondence relationship between each sub-pixel region and the correction data in the image.
  • the correction data can be calculated by various integrated circuit chips as long as the integrated circuit chips are capable of performing the calculation of the above-described correction data.
  • each sub-pixel corresponds to one gray scale.
  • the liquid crystal display panel of 3 ⁇ 3 resolution corresponds to 27 gray scales, according to the gray scale of each sub-pixel in the specific embodiment of the present invention.
  • the lookup is performed in Table 1, and the correspondence relationship between each sub-pixel region and the correction data is obtained, for example, as shown in Table 2.
  • the touch screen After the gate signal input of the last line of one frame is completed, before the output of the next frame image, that is, in the blank area between the adjacent two frames of images, the touch screen is touch-driven, and the touch controller outputs touch The scan signal is controlled while receiving the correction data table sent by the timing controller.
  • the correction data table is as shown in Table 2.
  • the touch controller outputs a touch scan signal to the touch driving electrode line, and receives the voltage signal output by the touch sensing electrode line through the touch scan signal coupled to the touch driving electrode line, and according to the received The voltage signal is determined to be opposite to the voltage signal
  • the touch controller determines the sub-pixel area corresponding to the touch screen position coordinate, determines the correction data corresponding to the sub-pixel area by searching the correction data table, and uses the correction data to correspond to the voltage signal.
  • the voltage waveform data is corrected, and it is determined whether the touch screen is touched based on the corrected voltage waveform data.
  • each touch driving electrode line Tx in the touch screen receives a touch scan signal
  • the touch controller receives the touch sensing electrode line Rx through the touch control driving electrode line Tx. And scanning a voltage signal output by the signal, and determining a touch screen position coordinate corresponding to the voltage signal according to the received voltage signal.
  • the touch driving electrode line T1 receives a touch scan signal
  • the touch controller receives the voltage signal output by the touch sensing electrode line R1 through the touch scan signal on the touch driving driving electrode line T1, and according to the The received voltage signal determines a touch screen position coordinate corresponding to the voltage signal (in this example, the position coordinate is an intersection position of the touch driving electrode line T1 and the touch sensing electrode line R1), and the touch controller determines the touch screen position.
  • the sub-pixel region corresponding to the coordinate in this example, the upper left sub-pixel region in FIG.
  • the sub-pixel is determined by the lookup correction data table Correction data corresponding to the region (in this example, assuming that the correction data corresponding to the sub-pixel region is A1), and correcting the voltage waveform data corresponding to the voltage signal by using the correction data (in this example, The voltage waveform data corresponding to the voltage signal is B).
  • the touch controller subtracts the voltage waveform data B corresponding to the voltage signal from the correction data A1 of the sub-pixel region corresponding to the touch screen position coordinate, and sets the difference (B-Al M ⁇ Corrected voltage waveform data.
  • the corrected voltage waveform data (B-A1) is greater than the preset standard data, such as data C, it is determined that the touch screen is touched.
  • the preset standard data is set according to actual production conditions. In the actual detection, when the data detected by the touch controller is greater than the preset standard data, a touch is generated. The loop is repeated to realize the touch and display driving of the embedded liquid crystal display.
  • a specific embodiment of the present invention further provides a touch screen touch detection system, where the system includes a timing controller 51 and a touch controller 52, wherein:
  • the timing controller 51 is configured to control the touch screen to output a frame image, and convert the gray scale of each sub-pixel region in the image into a corresponding correspondence by using a correspondence relationship between each gray scale and the correction data under the gray scale. Correcting data under gray scale, and composing the corrected data into a modified data table, wherein the modified data table includes correspondence between each sub-pixel region in the image and the corrected data;
  • the touch controller 52 is configured to output a touch scan signal to the touch driving electrode line, and receive a voltage signal output by the touch sensing electrode line through a touch scan signal coupled to the touch driving electrode line.
  • the voltage signal is used to determine a position coordinate of a touch position at which the touch screen may be touched; the touch controller is further configured to determine a sub-pixel area corresponding to the position coordinate, and determine the sub-pixel area corresponding by searching the modified data table
  • the correction data is corrected by the correction data for the voltage waveform data corresponding to the voltage signal, and it is determined whether the touch screen is touched based on the corrected voltage waveform data.
  • the internal structure of the timing controller 51 in the specific embodiment of the present invention is as shown in FIG. 6.
  • the timing controller 51 includes a data receiver unit, a data processor unit, a drive control signal generator unit, a correspondence table, a data transmitter unit, and a modified parameter finder unit.
  • the data transmitter unit transmits RGB data, a source control signal, and a gate control signal.
  • the modified parameter finder unit is used to send a correction data table.
  • FIG. 7 A block diagram of the in-cell touch liquid crystal display system in the specific embodiment of the present invention is shown in FIG.
  • the relationship between the timing controller 51 and the touch controller 52, and the relationship between the timing controller 51, the touch controller 52, and other units within the system can be seen from the figure.
  • the data transmitter unit transmits the transmit RGB data, the source control signal to the data driver, and transmits the gate control signal to the gate drive stage.
  • the timing controller sends the correction data table to the touch controller through the correction parameter finder (Fig. 6).
  • the touch controller After receiving the gate output signal from the last row of the liquid crystal panel, the touch controller starts the touch driving control of the liquid crystal panel, and the touch controller sends the touch scan signal to the liquid crystal panel through the touch driving electrode line Tx, and After the touch scan signal is coupled with the signal on the touch sensing electrode line, the voltage signal from the control sensing electrode line Rx is received, thereby determining whether the touch screen is touched.
  • the touch controller After receiving the gate output signal from the last row of the liquid crystal panel, the touch controller starts the touch driving control of the liquid crystal panel, and the touch controller sends the touch scan signal to the liquid crystal panel through the touch driving electrode line Tx, and After the touch scan signal is coupled with the signal on the touch sensing electrode line, the voltage signal from the control sensing electrode line Rx is received, thereby determining whether the touch screen is touched.

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Abstract

一种触摸屏触摸检测方法及系统、触摸显示装置，用以准确地检测触摸屏是否被触摸。所述方法包括输出一帧图像，利用预先建立的每一灰阶与该灰阶下的修正数据的对应关系，将图像中每个子像素区域的灰阶转换为对应灰阶下的修正数据，并将所得修正数据组成包括该图像中的各个子像素区域与修正数据的对应关系的修正数据表；输出扫描信号，并接收感应电极线输出的电压信号，确定与该电压信号对应的位置坐标，并确定与所述位置坐标对应的子像素区域，通过查找修正数据表确定该子像素区域对应的修正数据，利用修正数据对与所述电压信号对应的电压波形数据进行修正，根据修正后的电压波形数据判断触摸屏是否被触摸。

Description

检测触摸屏上的触摸的检测方法和系统、 以及触摸显示装置 技术领域
本发明涉及显示器技术领域， 尤其涉及一种用于检测触摸屏上的触摸的检 测方法及系统、 以及釆用该系统的触摸显示装置。 背景技术
现有技术中的内嵌式（in-cell ) 电容触摸屏相较传统的外挂式（out-cell ) 电容触摸屏结构， 可以省去一张触摸基板， 将整个显示模组制作得更轻薄。 内 嵌式触摸技术的液晶显示屏结构示意图如图 1所示， 由于触控驱动电极 Tx和 触控感应电极 Rx制作在液晶显示面板的阵列基板侧的玻璃基板上， 其中， 触 控驱动电极线与公共电极（Vcom ) 线共用， 内嵌式结构的电容触摸屏的触控 驱动电极和触控感应电极会与薄膜晶体管（ Thin Film Transistor, TFT )显示器 件之间产生各种寄生电容和耦合电容，液晶显示屏工作时 TFT上各种电压的交 替变化会对触控驱动电极 Tx和触控感应电极 Rx上的信号产生串扰，严重影响 触摸效果。图中的 Gatel、 Gate2、 Gate n表示每一行像素的栅极扫描线， Datal、 Data2、 Data n分别表示每一列像素的数据扫描线， CLC表示液晶显示面板之间 的电容， Cs表示存储电容。
目前的内嵌式触控技术釆用的驱动方式是分时驱动， 即在两帧画面之间的 空白区进行触控。在进行触控时， 源极驱动器和栅极驱动器向 TFT输出的电压 均停止变化，此时驱动信号对触控驱动电极 Tx和触控感应电极 Rx上的信号串 扰最弱。 内嵌式液晶屏驱动的工作流程图如图 2所示。 其中， 在触控（Touch ) 控制集成电路（IC )初始化扫描的时候， 液晶面板尚未驱动， 存储电容 Cs上 电荷量为零。 在每一帧画面的最后一行栅极（Gate )信号输入完成后， 触控控 制集成电路将进行扫描， 并将所得数据与初始化扫描时所得数据比对， 从而判 断是否有触摸发生。 但是， 由于在触控控制集成电路进行扫描时， 由于触控驱 动电极 Tx线与公共电极 Vcom线共用，存储电容 Cs及其它寄生和耦合电容上 的电荷量会对信号产生串扰， 因此， 即使在未发生触摸时， 由于此时画面的变 化， 触控控制集成电路的数据比对的结果也会发生变化， 从而导致误判断。
综上所述，现有技术的内嵌式触摸技术的液晶显示屏无法准确判断液晶显 示屏是否有触摸。
因此， 本领域需要一种能够准确地判断液晶显示屏是否被触摸的系统和方 法。 发明内容
为了解决上述技术问题，根据本发明提供了一种用于检测触摸屏是否被触 摸的检测方法及系统、 以及使用该系统的触摸显示装置， 用以准确的检测触摸 屏是否被触摸。
一方面，本发明的实施例提供的一种触摸屏触摸检测方法，所述方法包括： 控制触摸屏输出一帧图像， 利用预先建立的每一灰阶与该灰阶下的修正数 据的对应关系， 将所述图像中每个子像素区域的灰阶转换为对应灰阶下的修正 数据， 并将所得修正数据组成修正数据表， 该修正数据表中包括该图像中的各 个子像素区域与修正数据的对应关系；
输出触控扫描信号至触控驱动电极线， 并接收触控感应电极线通过耦合所 述触控驱动电极线上的触控扫描信号所输出的电压信号， 所述电压信号用于确 定触摸屏可能被触摸的触摸位置的位置坐标； 和
确定所述位置坐标对应的子像素区域， 通过查找所述修正数据表确定该子 像素区域对应的修正数据， 并利用修正数据对与电压信号对应的电压波形数据 进行修正， 根据修正后的电压波形数据判断触摸屏是否被触摸。
根据本发明实施例提供的用于检测触摸屏上的触摸的检测方法， 由于该方 法中可通过例如触控控制器输出触控扫描信号至触控驱动电极线， 并接收触控 感应电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的电压信 号， 并根据所述电压信号确定与该电压信号对应的触摸屏上的位置坐标， 可通 过触控控制器确定所述触摸屏位置坐标对应的子像素区域，通过查找所述修正 数据表确定该子像素区域对应的修正数据， 并利用该修正数据对与所述电压信 号对应的电压波形数据进行修正，根据修正后的电压波形数据判断触摸屏是否 被触摸， 因此， 本发明实施例提供的触摸屏上的触摸的检测方法能够准确的检 测触摸屏是否被触摸，有效的避免了 TFT上电平随画面变化对触摸信号的串扰 造成的影响。
根据本发明的一个实施例， 所述方法还包括预先建立每一灰阶与该灰阶下 的修正数据的对应关系的步骤， 该步骤包括：
在时序控制器初始化完成后 , 通过控制触摸屏输出预设图像；
通过触控控制器输出预设触控扫描信号给触控驱动电极线， 并接收触控感 应电极线通过耦合所述触控驱动电极线上的预设触控扫描信号所输出的特定 子像素区域对应的基准电压信号， 并将该基准电压信号转换为基准电压波形数 据， 将该基准电压波形数据作为基准数据；
分别釆用每一灰阶的灰阶电压对触摸屏的特定子像素进行驱动， 其中， 触 控控制器输出每个灰阶的触控扫描信号给触控驱动电极线， 并接收触控感应电 极线通过耦合所述触控驱动电极线上的每个灰阶的触控扫描信号所输出的所 述特定子像素区域的灰阶电压信号，从而得到与每一灰阶对应的所述特定子像 素区域的灰阶电压信号； 和
将与每一灰阶对应的所述特定子像素区域的灰阶电压信号转换为灰阶电 压波形数据， 针对每一灰阶电压波形数据， 将该灰阶电压波形数据与所述基准 电压波形数据的差值作为与该灰阶电压波形数据对应的灰阶下的修正数据， 建 立每一灰阶与该灰阶下的修正数据之间的对应关系。
这样， 通过预先建立的每一灰阶与该灰阶下的修正数据的对应关系， 可以 准确的检测触摸屏是否被触摸，有效的避免了 TFT上电平随画面变化对触摸信 号的串扰造成的影响。 根据本发明的一个实施例， 所述预设图像为黑色图像或白色图像。
当预设图像为黑色图像或白色图像， 在实际应用中更加方便、 简单。
根据本发明的一个实施例， 所述利用修正数据对与所述电压信号对应的电 压波形数据进行修正的步骤包括： 用与所述电压信号对应的电压波形数据减去 与所述位置坐标对应的子像素区域的修正数据得到差值，将该差值用作修正后 的电压波形数据。
这样，触控控制器将所述电压信号对应的电压波形数据减去与位置坐标对 应的子像素区域的修正数据得到差值， 并将该差值作为修正后的电压波形数据, 在实际检测过程中更加方便、 简单。
根据本发明的一个实施例， 所述根据修正后的电压波形数据判断触摸屏是 否被触摸的步骤， 包括：
当修正后的电压波形数据大于预设的标准数据时， 确定触摸屏被触摸。 这样， 当修正后的电压波形数据大于预设的标准数据时， 确定触摸屏被触 摸， 在实际检测过程中更加准确、 方便。
另一方面， 本发明的实施例还提供了一种检测触摸屏上的触摸的检测系统, 所述系统包括时序控制器和触控控制器， 其中：
所述时序控制器用于控制触摸屏输出一帧图像， 利用预先建立的每一灰阶 与该灰阶下的修正数据的对应关系， 将所述图像中每个子像素区域的灰阶转换 为对应灰阶下的修正数据， 并将所得修正数据组成修正数据表， 该修正数据表 中包括该图像中的各个子像素区域与修正数据的对应关系； 并且
所述触控控制器用于输出触控扫描信号至触控驱动电极线， 并接收触控感 应电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的电压信号， 所述电压信号用于确定触摸屏可能被触摸的的触摸位置的位置坐标； 所述触控 控制器还用于确定所述位置坐标对应的子像素区域，通过查找所述修正数据表 确定该子像素区域对应的修正数据， 并利用修正数据对与电压信号对应的电压 波形数据进行修正， 根据修正后的电压波形数据判断触摸屏是否被触摸。 由本发明实施例提供的触摸屏触摸检测系统， 由于触控控制器用于输出触 控扫描信号给触控驱动电极线， 并接收触控感应电极线通过耦合所述触控驱动 电极线上的触控扫描信号所输出的电压信号， 所述电压信号用于确定触摸屏可 能被触摸的触摸位置的位置坐标； 并且所述触控控制器还用于确定所述位置坐 标对应的子像素区域， 通过查找所述修正数据表确定该子像素区域对应的修正 数据， 并利用修正数据对与电压信号对应的电压波形数据进行修正， 根据修正 后的电压波形数据判断触摸屏是否被触摸， 因此， 本发明实施例提供的触摸屏 触摸检测系统能够准确的检测触摸屏是否被触摸，有效的避免了 TFT上电平随 画面变化对触摸信号的串扰造成的影响。
根据本发明的一个实施例，在预先建立每一灰阶与该灰阶下的修正数据的 对应关系时，
所述时序控制器还用于在初始化完成后， 控制触摸屏输出预设图像； 并且 所述触控控制器还用于输出预设触控扫描信号给触控驱动电极线， 并接收 触控感应电极线通过耦合所述触控驱动电极线上的预设触控扫描信号所输出 的特定子像素区域对应的基准电压信号， 并将该基准电压信号转换为基准电压 波形数据， 将该基准电压波形数据作为基准数据； 所述触控控制器还用于分别 釆用每一灰阶的灰阶电压对触摸屏的特定子像素进行驱动， 其中， 触控控制器 输出每个灰阶的触控扫描信号给触控驱动电极线， 并接收触控感应电极线通过 耦合所述触控驱动电极线上的每个灰阶的触控扫描信号所输出的所述特定子 像素区域的灰阶电压信号，从而得到每一灰阶对应的所述特定子像素区域的灰 阶电压信号； 所述触控控制器还将与每一灰阶对应的所述特定子像素区域的灰 阶电压信号转换为灰阶电压波形数据， 针对每一灰阶电压波形数据， 将该灰阶 电压波形数据与所述基准电压波形数据的差值作为与该灰阶电压波形数据对 应的灰阶下的修正数据， 建立每一灰阶与该灰阶下的修正数据之间的对应关系。
这样， 通过建立每一灰阶与该灰阶下的修正数据之间的对应关系， 可以准 确的检测触摸屏是否被触摸，有效的避免了 TFT上电平随画面变化对触摸信号 的串扰造成的影响。
根据本发明的一个实施例，在利用修正数据对与电压信号对应的电压波形 数据进行修正时， 所述触控控制器用与所述电压信号对应的电压波形数据减去 与所述位置坐标对应的子像素区域的修正数据得到差值， 并将该差值用作修正 后的电压波形数据。
这样， 由于触控控制器具体用于将所述电压信号对应的电压波形数据减去 位置坐标对应的子像素区域的修正数据，将其差值作为修正后的电压波形数据, 在实际检测过程中更加方便、 简单。
根据本发明的一个实施例，在根据修正后的电压波形数据判断触摸屏是否 被触摸时， 如果修正后的电压波形数据大于预设的标准数据， 则所述触控控制 器确定触摸屏被触摸。
这样， 由于触控控制器具体用于确定触摸屏被触摸， 在实际检测过程中更 加准确。
根据本发明的再一个方面， 还提供了一种触摸显示装置， 所述装置包括上 述的触摸检测系统。
根据本发明的实施例提供的触摸显示装置， 由于该装置包括上述的触摸检 测系统， 因此， 本发明实施例提供的触摸显示装置能够准确的检测触摸情况， 有效的避免了 TFT上电平随画面变化对触摸信号的串扰造成的影响。 附图说明
图 1为现有技术中基于内嵌式触摸技术的液晶显示屏的原理图；
图 2为现有技术中内嵌式液晶屏驱动的工作流程图；
图 3为根据本发明的实施例的触摸屏触摸检测方法的流程图；
图 4为根据本发明的实施例的液晶面板的像素结构示意图；
图 5为根据本发明的实施例的触摸屏触摸检测系统的示意图；
图 6为才艮据本发明的实施例的时序控制器的内部结构示意图； 图 7为根据本发明的实施例的基于内嵌式触摸技术的液晶显示屏的系统方 块图。 具体实施方式 统、 以及触摸显示装置。
图 3示出了一种触摸屏触摸的检测方法的流程图， 所述方法包括：
5301、 时序控制器控制触摸屏输出一帧图像， 利用预先建立的每一灰阶与 该灰阶下的修正数据的对应关系，将所述图像中每个子像素区域的灰阶转换为 对应灰阶下的修正数据， 并将所得修正数据组成修正数据表， 该修正数据表中 包括该图像中的各个子像素区域与修正数据的对应关系；
5302、 触控控制器输出触控扫描信号至触控驱动电极线， 并接收触控感应 电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的电压信号， 所 述电压信号用于确定触摸屏可能被触摸的触摸位置的位置坐标； 和
5303、 触控控制器确定所述位置坐标对应的子像素区域， 通过查找所述修 正数据表确定该子像素区域对应的修正数据， 并利用修正数据对与电压信号对 应的电压波形数据进行修正，根据修正后的电压波形数据判断触摸屏是否被触 摸。
下面将结合本发明的具体实施例详细地说明图 3中所示的检测方法。
本发明的具体实施例以釆用高级超维场转换（Advanced Super Dimension Switch, ADS )模式（即常黑模式） 的内嵌式液晶显示面板为例说明。 本发明 具体实施例中的触摸屏以内嵌式电容触摸液晶显示屏为例。
本发明具体实施例以 8位色深的液晶显示面板为例介绍。 8位的液晶显示 面板共有 256个灰阶， 每一个灰阶都对应一个正灰阶（Gamma )电压和一个负 灰阶电压。 ADS液晶显示面板以恒定的电压 Vcom作为公共电极电压， 当液晶 显示面板内的灰阶电压高于公共电极电压 Vcom时， 该灰阶电压被称之为正灰 阶电压， 当液晶显示面板内的灰阶电压低于公共电极电压 Vcom时， 该灰阶电 压被称之为负灰阶电压。对应的一组正 /负灰阶电压能够驱动液晶分子得到相应 的一个灰阶。 在液晶显示面板的触控阶段， 每一组灰阶电压对应的灰阶会影响 触控检测， 与灰阶电压的正负极性无关。 在根据本发明的具体实施例的触摸屏触摸检测方法中， 在系统端和时序控 制器初始化完成后， 时序控制器控制触摸屏输出预设图像。 接下来， 触控控制 器输出触控扫描信号至触控驱动电极线， 并接收触控感应电极线通过耦合所述 触控驱动电极线上的触控扫描信号所输出的特定子像素区域对应的电压信号， 并将接收到的该电压信号转换为电压波形数据， 然后将该电压波形数据作为基 准数据保存到触控控制器中。 在本发明的实施例中， 所述预设图像可以为黑色 图像或白色图像， 当然也可以根据实际的检测情况将预设图像设置为其它色彩 的图像。 本发明的具体实施例中的预设图像是以黑色图像为例加以说明的。 在本发明的实施例中， 分别釆用每一灰阶的灰阶电压对触摸屏的特定子像 素区域进行驱动。 触控控制器输出触控扫描信号给触控驱动电极线， 并接收触 控感应电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的所述 特定子像素区域的电压信号，从而得到每一灰阶对应的所述特定子像素区域的 电压信号。触控控制器将每一灰阶对应的所述特定子像素区域的电压信号转换 为相应的电压波形数据。 针对每一电压波形数据， 将该电压波形数据与所述基 准数据的差值作为该电压波形数据对应的灰阶下的修正数据，从而建立每一灰 阶与该灰阶下的修正数据之间的对应关系。 由于在本发明的具体实施例中使用 的是 8位液晶显示面板， 因此总共可以得到 256个对应关系， 如表 1所示。 之 后将得到的对应关系保存到时序控制器中。 在实际检测中， 表 1的对应关系可 以通过仿真和大量的测试等方式得到， 如具体可用示波器进行测试。
表 1 灰阶阶数 1 2 255 256 修正数据 A1 A2 A255 A256 在本发明的实施例中，如图 4所示，假设液晶显示面板具有 3x3的分辨率。 3*3分辨率的液晶显示面板中共有 27个子像素。首先进行系统端和时序控制器 的初始化， 之后时序控制器控制触摸屏输出黑色图像。 接下来， 触控控制器对 输出的黑色图像进行扫描。 在该过程中， 触控控制器输出触控扫描信号至触控 驱动电极线， 并接收触控感应电极线通过耦合所述触控驱动电极线上的触控扫 描信号所输出的特定子像素区域对应的电压信号， 并将接收到的该电压信号转 换为电压波形数据， 然后将该电压波形数据作为基准数据。 然后时序控制器接 收系统端输出的数据信号， 控制触摸屏输出一帧图像， 利用预先建立的包括每 一灰阶与该灰阶下的修正数据的对应关系，将该图像中每个子像素区域的灰阶 转换为对应灰阶下的修正数据， 并将所得的修正数据组成修正数据表， 该修正 数据表中包括该图像中的各个子像素区域与修正数据的对应关系。在本发明的 具体实施例中， 修正数据可通过各种集成电路芯片计算得到， 只要这些集成电 路芯片能够执行上述修正数据的计算。 具体的， 在本发明的实施例中， 每个子 像素均对应一个灰阶， 因此， 3x3分辨率的液晶显示面板对应 27个灰阶， 根据 每个子像素的灰阶在本发明具体实施例中的表 1中进行查找，得到每个子像素 区域与修正数据的对应关系， 例如， 如表 2所示。
表 2
Figure imgf000011_0001
在一帧图像的最后一行栅极信号输入完成后、 下一帧图像输出前， 即在相 邻两帧图像之间的空白区内， 对触摸屏进行触控驱动， 此时触控控制器输出触 控扫描信号， 同时接收时序控制器发送的修正数据表， 例如， 在本发明的具体 实施例中， 所述修正数据表如表 2所示。 触控控制器输出触控扫描信号至触控 驱动电极线， 并接收触控感应电极线通过耦合所述触控驱动电极线上的触控扫 描信号所输出的电压信号， 并根据接收到的所述电压信号确定与该电压信号对 应的触摸屏位置坐标， 触控控制器确定所述触摸屏位置坐标对应的子像素区域, 通过查找所述修正数据表确定该子像素区域对应的修正数据， 并利用该修正数 据对所述电压信号对应的电压波形数据进行修正，根据修正后的电压波形数据 判断触摸屏是否被触摸。
接下来将参照图 1对判断触摸屏是否被触摸的过程加以说明。
如图 1所示， 触摸屏中的每一条触控驱动电极线 Tx均会接收到一个触控 扫描信号， 触控控制器接收触控感应电极线 Rx通过耦合触控驱动电极线 Tx 上的触控扫描信号所输出的电压信号 , 并根据接收到的所述电压信号确定与该 电压信号对应的触摸屏位置坐标。 例如： 触控驱动电极线 T1接收到一个触控 扫描信号， 触控控制器接收触控感应电极线 R1 通过耦合触控驱动电极线 T1 上的触控扫描信号所输出的电压信号， 并根据该接收到的电压信号确定与该电 压信号对应的触摸屏位置坐标（在该例子中， 该位置坐标为触控驱动电极线 T1和触控感应电极线 R1的交叉位置）， 触控控制器确定触摸屏位置坐标对应 的子像素区域（在该例子中， 为与触控驱动电极线 T1 和触控感应电极线 R1 的交叉位置对应的图 4 中左上角子像素区域）， 通过查找修正数据表确定该子 像素区域对应的修正数据（在该例子中， 假设该子像素区域对应的修正数据为 A1 ), 并利用该修正数据对所述电压信号对应的电压波形数据进行修正（在该 例子中， 4叚设电压信号对应的电压波形数据为 B )。在一个示例性的实施例中， 触控控制器将所述电压信号对应的电压波形数据 B 减去触摸屏位置坐标对应 的子像素区域的修正数据 A1 ,将其差值（B-Al M乍为修正后的电压波形数据。 当修正后的电压波形数据（B-A1 ) 大于预设的标准数据， 如数据 C 时， 则确 定触摸屏被触摸。 这里预设的标准数据是根据实际生产情况进行设定的， 实际 检测中认为触控控制器检测到的数据大于该预设的标准数据时就产生触摸。如 此反复循环， 实现嵌入式液晶显示屏的触摸和显示驱动。
如图 5所示， 本发明具体实施例还提供了一种触摸屏触摸检测系统， 所述 系统包括时序控制器 51和触控控制器 52, 其中： 所述时序控制器 51 用于控制触摸屏输出一帧图像， 利用预先建立的每一 灰阶与该灰阶下的修正数据的对应关系，将所述图像中每个子像素区域的灰阶 转换为对应灰阶下的修正数据， 并将所得修正数据组成修正数据表， 该修正数 据表中包括该图像中的各个子像素区域与修正数据的对应关系； 并且
所述触控控制器 52用于输出触控扫描信号至触控驱动电极线， 并接收触 控感应电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的电压 信号， 所述电压信号用于确定触摸屏可能被触摸的触摸位置的位置坐标； 所述 触控控制器还用于确定所述位置坐标对应的子像素区域，通过查找所述修正数 据表确定该子像素区域对应的修正数据， 并利用修正数据对与电压信号对应的 电压波形数据进行修正， 根据修正后的电压波形数据判断触摸屏是否被触摸。
本发明具体实施例中的时序控制器 51 内部的结构如图 6所示。 其中， 时 序控制器 51 包括数据接收器单元、 数据处理器单元、 驱动控制信号发生器单 元、 对应关系表、 数据发送器单元和修正参数查找器单元。 其中， 数据发送器 单元发送 RGB数据、 源极控制信号和栅极控制信号。 修正参数查找器单元用 于发送修正数据表。
本发明具体实施例中的内嵌式触摸液晶显示屏系统方块图如图 7所示。从 图中可以看到时序控制器 51与触控控制器 52之间的关系，以及时序控制器 51、 触控控制器 52与系统内的其他单元之间的关系。 如图 7所示， 数据发送器单 元将发送 RGB数据、 源极控制信号发送到数据驱动器， 并将栅极控制信号发 送到栅极驱动级。 此外时序控制器通过修正参数查找器 （图 6 )将修正数据表 发送至触控控制器。触控控制器接收到来自液晶面板的最后一行的栅极输出信 号后开始对液晶面板的触控驱动控制， 并且触控控制器通过触控驱动电极线 Tx发送触控扫描信号至液晶面板， 并在触控扫描信号与触控感应电极线上的 信号耦合之后， 接收来自控感应电极线 Rx的电压信号， 进而对触摸屏是否被 触摸进行判断。 明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求 书
1、 一种检测触摸屏上的触摸的方法， 其特征在于， 所述方法包括： 控制触摸屏输出一帧图像， 利用预先建立的每一灰阶与该灰阶下的修正数 据的对应关系， 将所述图像中每个子像素区域的灰阶转换为对应灰阶下的修正 数据， 并将得到的修正数据组成修正数据表， 该修正数据表中包括该图像中的 各个子像素区域与修正数据的对应关系；
输出触控扫描信号至触控驱动电极线， 并接收触控感应电极线通过耦合所 述触控驱动电极线上的触控扫描信号所输出的电压信号， 所述电压信号用于确 定触摸屏可能被触摸的触摸位置的位置坐标； 和
确定所述位置坐标对应的子像素区域， 通过查找所述修正数据表确定该子 像素区域对应的修正数据， 并利用修正数据对与电压信号对应的电压波形数据 进行修正， 根据修正后的电压波形数据判断触摸屏是否被触摸。
2、 根据权利要求 1 所述的方法， 还包括预先建立每一灰阶与该灰阶下的 修正数据的对应关系的步骤， 该步骤包括：
在时序控制器初始化完成后 , 通过控制触摸屏输出预设图像；
输出预设触控扫描信号给触控驱动电极线， 并接收触控感应电极线通过耦 合所述触控驱动电极线上的预设触控扫描信号所输出的与特定子像素区域对 应的基准电压信号， 并将该基准电压信号转换为基准电压波形数据， 将该基准 电压波形数据作为基准数据；
分别釆用每一灰阶的灰阶电压对触摸屏的特定子像素进行驱动， 其中， 触 控控制器输出每个灰阶的触控扫描信号给触控驱动电极线， 并接收触控感应电 极线通过耦合所述触控驱动电极线上的每个灰阶的触控扫描信号所输出的所 述特定子像素区域的灰阶电压信号，从而得到与每一灰阶对应的所述特定子像 素区域的灰阶电压信号； 和
将与每一灰阶对应的所述特定子像素区域的灰阶电压信号转换为灰阶电 压波形数据， 针对每一灰阶电压波形数据， 将该灰阶电压波形数据与所述基准 电压波形数据的差值作为与该灰阶电压波形数据对应的灰阶下的修正数据， 建 立每一灰阶与该灰阶下的修正数据之间的对应关系。
3、 根据权利要求 2所述的方法， 其特征在于， 所述预设图像为黑色图像 或白色图像。
4、 根据权利要求 1 所述的方法， 其特征在于， 所述利用修正数据对与电 压信号对应的电压波形数据进行^ ί'爹正的步骤包括：
用与所述电压信号对应的电压波形数据减去与所述位置坐标对应的子像 素区域的修正数据得到差值， 将该差值用作修正后的电压波形数据。
5、 根据权利要求 1 所述的方法， 其特征在于， 所述根据修正后的电压波 形数据判断触摸屏是否被触摸的步骤包括：
当修正后的电压波形数据大于预设的标准数据时， 确定触摸屏被触摸。
6、 一种检测触摸屏上的触摸的检测系统， 所述系统包括时序控制器和触 控控制器， 其特征在于：
所述时序控制器用于控制触摸屏输出一帧图像， 利用预先建立的每一灰阶 与该灰阶下的修正数据的对应关系， 将所述图像中每个子像素区域的灰阶转换 为对应灰阶下的修正数据， 并将得到的修正数据组成修正数据表， 该修正数据 表中包括该图像中的各个子像素区域与修正数据的对应关系； 和
所述触控控制器用于输出触控扫描信号至触控驱动电极线， 并接收触控感 应电极线通过耦合所述触控驱动电极线上的触控扫描信号所输出的电压信号， 所述电压信号用于确定触摸屏可能被触摸的触摸位置的位置坐标； 所述触控控 制器还用于确定所述位置坐标对应的子像素区域，通过查找所述修正数据表确 定该子像素区域对应的修正数据， 并利用修正数据对与电压信号对应的电压波 形数据进行修正， 根据修正后的电压波形数据判断触摸屏是否被触摸。
7、 根据权利要求 6所述的系统， 其特征在于， 在预先建立每一灰阶与该 灰阶下的修正数据的对应关系时，
所述时序控制器还用于在初始化完成后， 控制触摸屏输出预设图像； 并且 所述触控控制器还用于输出预设触控扫描信号给触控驱动电极线， 并接收 触控感应电极线通过耦合所述触控驱动电极线上的预设触控扫描信号所输出 的特定子像素区域对应的基准电压信号， 并将该基准电压信号转换为基准电压 波形数据， 将该基准电压波形数据作为基准数据； 所述触控控制器还用于分别 釆用每一灰阶的灰阶电压对触摸屏的特定子像素进行驱动， 其中， 触控控制器 输出每个灰阶的触控扫描信号给触控驱动电极线， 并接收触控感应电极线通过 耦合所述触控驱动电极线上的每个灰阶的触控扫描信号所输出的所述特定子 像素区域的灰阶电压信号，从而得到每一灰阶对应的所述特定子像素区域的灰 阶电压信号； 所述触控控制器还将与每一灰阶对应的所述特定子像素区域的灰 阶电压信号转换为灰阶电压波形数据， 针对每一灰阶电压波形数据， 将该灰阶 电压波形数据与所述基准电压波形数据的差值作为与该灰阶电压波形数据对 应的灰阶下的修正数据， 建立每一灰阶与该灰阶下的修正数据之间的对应关系。
8、 根据权利要求 6所述的系统， 其特征在于， 在利用修正数据对与电压 信号对应的电压波形数据进行修正时， 所述触控控制器用与所述电压信号对应 的电压波形数据减去与所述位置坐标对应的子像素区域的修正数据得到差值， 并将该差值用作修正后的电压波形数据。
9、 根据权利要求 6所述的系统， 其特征在于， 在根据修正后的电压波形 数据判断触摸屏是否被触摸时，如果修正后的电压波形数据大于预设的标准数 据， 则所述触控控制器确定触摸屏被触摸。
10、 一种触摸显示装置， 其特征在于， 所述装置包括权利要求 6-9中任一 权项所述的触摸检测系统。
PCT/CN2014/085120 2014-03-31 2014-08-25 检测触摸屏上的触摸的检测方法和系统、以及触摸显示装置 Ceased WO2015149472A1 (zh)

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