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WO2016026222A1 - 触控显示装置及其驱动方法 - Google Patents

触控显示装置及其驱动方法 Download PDF

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Publication number
WO2016026222A1
WO2016026222A1 PCT/CN2014/091127 CN2014091127W WO2016026222A1 WO 2016026222 A1 WO2016026222 A1 WO 2016026222A1 CN 2014091127 W CN2014091127 W CN 2014091127W WO 2016026222 A1 WO2016026222 A1 WO 2016026222A1
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WIPO (PCT)
Prior art keywords
touch
group
common electrodes
driving
common
Prior art date
Application number
PCT/CN2014/091127
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English (en)
French (fr)
Inventor
丁小梁
董学
王海生
任涛
刘英明
谢晓波
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Publication of WO2016026222A1 publication Critical patent/WO2016026222A1/zh

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    • 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
    • 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
    • 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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a touch display device and a driving method thereof.
  • the touch function of the display device can be realized by attaching the touch screen to the display screen or by using In Cell Touch technology.
  • the in-cell touch technology integrates the touch components into the display screen, so that the display itself has the technology of touch function.
  • the in-cell touch display device can complete the manufacture of the touch component in the standard process of the touch display device, without the problem of conforming and alignment, the product is lighter and thinner, no need for a frame, and can achieve various advantages such as a full-plane design. It is one of the hotspots of current research.
  • the in-cell touch function is usually implemented by time-multiplexing the common electrodes.
  • the specific process is: dividing the time of one frame into a display driving period and a touch driving period, and applying a common electrode voltage signal required for displaying the screen to all the common electrodes in the display driving period, in the touch driving period,
  • the common electrode in the specific area scans the driving line, and the common electrode voltage signal required for the screen display is still applied to the remaining common electrodes that are not involved in the touch driving, thereby realizing the functions of the screen display and the touch driving.
  • the touch drive voltage will have a certain adverse effect on the normal display of the corresponding area.
  • the touch driving period of each frame applies a touch driving voltage to the common electrode of the fixed area during the continuous frame time, the display of the screen is not uniform.
  • the touch driving voltage is continuously applied to the common electrode in the same region, the aging rate of the liquid crystal molecules in the region is accelerated.
  • the present disclosure provides a touch display device and a driving method thereof, which can solve the problem that the in-line touch display device has uneven display on the screen and the aging speed of the liquid crystal molecules is fast.
  • a touch display device includes: a plurality of common electrodes arranged in a matrix, the plurality of common electrodes being divided into groups of W, each group comprising M rows of common electrodes, each row comprising N common electrodes; wherein, W ⁇ 2, M ⁇ 1, N ⁇ 1; W groups of driving lines connected in one-to-one correspondence with the common electrodes of the W group, each group comprising N driving lines, wherein the N driving lines are respectively connected to the N common electrodes, and a common electrode of the same column in the same column is connected to the same driving line; a driving chip connected to the W group driving line, wherein the driving chip is used to use the W group driving line to the W group in the display period of the current frame
  • the electrode simultaneously applies the common electrode voltage signal, and applies a touch driving signal to the group of common electrodes connected thereto in a touch period of the current frame by using a set of driving lines, and uses the W group in the display period of the next frame.
  • the driving line simultaneously applies the common electrode voltage signal to the W group common electrode, and applies a touch driving signal to the group of common electrodes connected thereto in a touch period of the next frame by using a set of driving lines, wherein Said The common electrode to which the touch driving signal is applied in the touch period of the previous frame and the common electrode to which the touch driving signal is applied in the touch period of the next frame belong to different groups.
  • the plurality of common electrodes are arranged to include a plurality of repeating units, each of the repeating units includes W rows of common electrodes, and the W rows of common electrodes respectively belong to the W group of common electrodes.
  • the plurality of common electrodes comprise odd-numbered row common electrodes and even-numbered row common electrodes; when the plurality of common electrodes are divided into two groups, one of the groups includes only the odd-numbered row common electrodes, and A group includes only the even-numbered row of common electrodes.
  • the driving chip is further configured to simultaneously apply the common electrode voltage signal to a common electrode included in a group not to which the touch driving signal is applied during a touch period of each frame.
  • the touch display device further includes: W groups of sensing electrodes corresponding to the common electrode of the W group, each group comprising M sensing electrodes, wherein the M sensing electrodes respectively intersect with the M rows of common electrodes
  • the driving chip is further configured to read, on a touch period of each frame, a touch sensing signal on the M sensing electrodes included in a group of sensing electrodes corresponding to a group of common electrodes to which the touch driving signal is applied.
  • the driving chip includes a timing control circuit, and the timing control circuit is configured to control an input timing of the common electrode voltage signal and the touch driving signal.
  • the present disclosure also provides a driving method applied to the touch display device described above, the driving method comprising: simultaneously applying a common electrode voltage signal to the W group common electrodes in a display period of the current frame; Applying a touch driving signal to a group of common electrodes column by column during the touch period; Applying the common electrode voltage signal to the W group common electrode simultaneously in the display period of the next frame; applying a touch driving signal to the group of common electrodes column by column in the touch period of the next frame; wherein, the current frame The common electrode to which the touch driving signal is applied in the touch period and the common electrode to which the touch driving signal is applied in the touch period of the next frame belong to different groups.
  • the plurality of common electrodes of the touch display device include an odd row common electrode and an even row common electrode which are alternately arranged, and the plurality of common electrodes are divided into two groups, wherein one group only includes the odd row common An electrode, the other group includes only the even-numbered row common electrode, and the driving method specifically includes: simultaneously applying the common electrode voltage signal to the plurality of common electrodes in a display period of the odd-numbered frame; in a touch period of the odd-numbered frame Applying the touch driving signal to the odd-numbered row common electrode in a row; applying the common electrode voltage signal to the plurality of common electrodes simultaneously in a display period of an even frame; and to the even number in a touch period of an even frame
  • the row of common electrodes applies the touch drive signals column by column.
  • the driving method further includes: applying the common electrode voltage signal to a common electrode included in a group to which the touch driving signal is not applied during a touch period of each frame.
  • the driving method further includes: reading, on the M sensing electrodes included in a group of sensing electrodes corresponding to a group of common electrodes to which the touch driving signal is applied, in a touch period of each frame; Induction signal.
  • the common electrode is divided into a plurality of groups, and each column of common electrodes in each group corresponds to one driving line, and each common electrode in each column and the corresponding driving line Connected, and connect all the driving lines to a driving chip to drive one set of common electrodes during the touch period of the current frame, and different groups from the common electrodes driven by the current frame in the touch period of the next frame
  • the common electrode is driven to realize the touch driving of the common electrodes in different regions in the adjacent touch period. Therefore, the phenomenon that the high voltage is applied to the common electrode to drive the normal display of the corresponding region does not continuously appear in the same region. Therefore, the uniformity of display of the in-cell touch display device is improved.
  • the touch driving voltage is continuously applied to the common electrodes in the same region, thereby solving the problem that the touch driving voltage is continuously applied.
  • the liquid crystal molecules in the fixed region are prone to aging.
  • FIG. 1 is a structural diagram of a touch display device according to an embodiment of the present disclosure
  • FIG. 2 is an equivalent circuit diagram of the touch display device according to an embodiment of the present disclosure during a touch period.
  • An embodiment of the present disclosure provides a touch display device including: a plurality of common electrodes arranged in a matrix, the plurality of common electrodes being divided into groups of W, each group including M rows of common electrodes, each row including N common electrodes Wherein, W ⁇ 2, M ⁇ 1, N ⁇ 1; Group W driving lines connected one-to-one with the common electrode of the W group, each group comprising N driving lines, and the N driving lines respectively and the N common electrodes Connected, and a common electrode in the same column of a group of common electrodes is connected to the same driving line; a driving chip connected to the W group driving line, and the driving chip is used to use the W group driving line to the W group in the display period of the current frame
  • the common electrode simultaneously applies the common electrode voltage signal, and applies a touch driving signal to the group of common electrodes connected thereto in a touch period of the current frame by using a group of driving lines, and uses the W group driving in the display period of the next frame.
  • the line simultaneously applies a common electrode voltage signal to the group W common electrode, and applies a touch driving signal to the group of common electrodes connected thereto by a group of driving lines in a touch period of the next frame, wherein the current frame is The common electrode to which the touch driving signal is applied in the touch period and the common electrode to which the touch driving signal is applied in the touch period of the next frame belong to different groups.
  • the pixel electrode Since the TFT (Thin Film Transistor) has a slight leakage when it is turned off, although the TFT is turned off during the touch period of one frame, the pixel electrode still has a certain voltage.
  • the common electrode applies a high-level touch driving signal, the liquid crystal molecules in the region change from the deflection state required for normal display, and become abnormal, thereby adversely affecting the screen display of the region. If the touch period of each frame of the continuous frame picture is the same area When the common electrode is touch-driven, the adverse effect will accumulate, causing the display of the image in the area to be abnormal.
  • the voltage on the common electrode that is not involved in the touch driving is the voltage required for the normal display of the picture, and the part is common.
  • the screen of the corresponding area of the electrode is normally displayed; normally, the touch driving is arranged in a staggered manner with the common electrode not participating in the touch driving, so that the normal display area and the abnormal display area are interlaced, resulting in a decrease in uniformity of the screen display.
  • the common electrode connected to the driving chip through the driving line is divided into multiple groups.
  • Touch driving is performed on a group of common electrodes in one touch period, and the control chip can control touch driving of different groups of common electrodes in a continuous touch period, thereby avoiding continuous continuous implementation of the common electrodes in the fixed area.
  • the touch driving device realizes the driving of the common electrode in the touch period of the continuous frame, so that the adverse effect of applying the touch driving level to the common electrode in the same region on the screen display lasts only one touch period. The adverse effect occurs in other areas during the next touch period, so the adverse effects cannot be accumulated, thereby greatly improving the uniformity of the screen display of the in-cell touch display device and improving the screen display effect.
  • the above-mentioned touch display device in the present embodiment realizes the driving of the common electrode in the touch period of the continuous frame, thereby avoiding the continuous application of the touch driving voltage to the common electrode of the fixed region.
  • the problem that the liquid crystal molecules are apt to aging is equivalent to evenly distributing the adverse effects of the touch driving voltage on the liquid crystal molecules to the liquid crystal molecules in each region, thereby reducing the aging speed of the liquid crystal molecules.
  • the plurality of common electrodes may be arranged to include: a plurality of repeating units, each of the repeating units including W rows of common electrodes, and the W rows of common electrodes respectively belong to
  • the common electrode of group W that is, the common electrode of each row in each group is evenly distributed on the substrate, and the common electrodes of different rows and rows are alternately and periodically arranged. More specifically, if the W group common electrodes are the first group, the second group, the ..., the wth group, the row of common electrodes belonging to the first group is Com[1], and the row of the common electrodes belonging to the second group is Com.
  • the common electrode belonging to the wth group is Com[w], then Com[1], Com[2], ..., Com[w], Com[1], Com[2], The order of ..., Com[w], ... is periodically arranged row by row, and Com[1], Com[2], ..., Com[w] total w rows of common electrodes are one repeating unit, and M repeating units are side by side.
  • the touch driving signal is applied to the M line Com[1] of the first group common electrode during the touch period of the first frame; in the touch period of the second frame, Applying a touch driving signal to the M line Com[2] of the second group of common electrodes; ...; applying touch to the M line Com[w] of the wth group common electrode during the touch period of the wth frame
  • the drive signal thus achieves scan drive of all common electrodes in successive w frames.
  • the number of groups into which the common electrodes are divided is not limited, and may be determined according to actual touch precision. If the required touch precision is high, the number of common electrode groups can be reduced accordingly.
  • the electrodes are divided into two groups one group includes only odd-line common electrodes, and the other group includes only even-line common electrodes (multiple common electrodes include odd-numbered row common electrodes and even-row common electrodes); if required If the touch accuracy is not very high, the number of groups of common electrodes can be increased.
  • the specific connection structure will be described.
  • the common electrodes 101 on the substrate are arranged in 6 rows and 3 columns, and are divided into two groups: the first group includes common electrodes of odd rows (ie, the first row, the third row, and the fifth row).
  • the drive line consists of six strips, which are divided into two groups: the first group includes Tx1, Tx2, and Tx3, and the second group includes Tx1', Tx2', and Tx3', where Tx1 and the three public belonging to the first column and belonging to the odd row
  • the electrodes are connected, Tx2 is connected to three common electrodes belonging to the second column and belonging to the odd rows, and Tx3 is connected to the three common electrodes belonging to the third column and belonging to the odd rows, Tx1' and 3 belonging to the first column and belonging to the even rows
  • Tx2' is connected to three common electrodes belonging to the second column and belonging to the even rows, and Tx3' is connected to the three common electrodes belonging to the third column and belonging to the even rows.
  • the first group of common electrodes participate in the touch driving, and the touch driving signals are applied one by one to the Tx1, Tx2, and Tx3 in the first group of driving lines to realize the common to the odd rows in each column.
  • the column is driven column by column.
  • the second group of common electrodes participate in the touch driving, and the touch driving signals are applied one by one to the Tx1′, Tx2′ and Tx3′ in the second group driving lines.
  • the number of common electrodes is larger than that of FIG. The number shown is much more, and thus the values of M and N are much larger than three, and those skilled in the art can obtain the actually required touch display device by the above-described circuit structure deformation.
  • the driving line is optionally connected to the common electrode 101 to be connected through a via hole to avoid It is connected to other common electrodes that do not need to be connected; the intersection of the drive lines is provided with an insulating layer to avoid electrical connection between the drive lines.
  • the driving chip described in this embodiment is further configured to simultaneously apply a common electrode voltage signal to a common electrode included in the group not to which the touch driving signal is applied during the touch period, so that the common electrode not participating in the touch driving is applied. It has the common electrode voltage required for display and maintains the normal display of the picture.
  • the driving chip may include a timing control circuit for controlling an input timing of the common electrode voltage signal and the touch driving signal, and the timing control circuit may be, for example, a counter.
  • the touch display device further includes: one-to-one correspondence with the common electrode of the W group.
  • the W group sensing electrodes each include M sensing electrodes, and the M sensing electrodes respectively overlap with the M rows of common electrodes; correspondingly, the driving chip is also used for reading and being applied during the touch period of each frame.
  • the touch driving signal is a touch sensing signal on the M sensing electrodes included in a group of sensing electrodes corresponding to a common electrode.
  • the sensing electrodes include six strips, which are divided into two groups: the first group includes Rx1, Rx2, and Rx3, corresponding to the first group of common electrodes and the first group of driving lines, and the second The set includes Rx1', Rx2', and Rx3', corresponding to the second set of common electrodes and the second set of drive lines.
  • Rx1 overlaps with three common electrodes of the first row
  • Rx2 overlaps with three common electrodes of the third row
  • Rx3 overlaps with three common electrodes of the fifth row
  • Rx1' and three of the second row The common electrodes overlap
  • Rx2' overlaps with the three common electrodes of the fourth row
  • Rx3' overlaps with the three common electrodes of the sixth row.
  • the three sensing electrodes Rx1 and Rx2 of the first group overlapping the three common electrodes are read line by line. And the sensing signal on the Rx3 to determine whether there is a touch action according to the change of the touch sensing signal.
  • the working process of the sensing electrodes can be similarly derived, and will not be repeated here.
  • the sensing electrode and the common electrode 101 are insulated from each other to form mutual capacitance therebetween.
  • the mutual capacitance changes, and the touch sensing signal read from the sensing electrode can represent the mutual capacitance. Therefore, by sensing the change of the touch sensing signal, information about whether there is a touch action can be obtained.
  • the induction electrode is transparent.
  • the touch display device provided in this embodiment may be an ADS (Advanced Super Dimension Switch) type, a TN (Twisted Nematic) type, or an MVA. (Multi-domain Vertical Alignment), PVA (Patterned Vertical Alignment), IPS (In-Plane Switching), FFS (Fringe Field Switching), etc.
  • a type of liquid crystal touch display device specifically, it can be any product or component having a display function such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the embodiment further provides a driving method of the touch display device, which is applied to the touch display device provided in this embodiment.
  • the driving method includes:
  • a touch driving signal is applied to a group of common electrodes column by column during the touch period of the next frame.
  • the common electrode to which the touch driving signal is applied in the touch period of the current frame and the common electrode to which the touch driving signal is applied in the touch period of the next frame belong to different groups.
  • the above driving method drives a group of common electrodes in the touch period of the current frame, and drives another group of common electrodes in the touch period of the next frame, thereby realizing the driving of the common electrode in the touch period of the continuous frame, avoiding
  • the problem of non-uniform display and fast aging of liquid crystal molecules caused by continuous touch driving of the common electrode in the fixed area improves the display uniformity of the in-cell touch display device and prolongs the life of the liquid crystal molecule.
  • the touch period of one frame drives a group of driving lines and a corresponding group of common electrodes, and which group of driving lines and common electrodes participate in the touch period of each frame
  • the touch driving is not limited in this embodiment, as long as the touch driving of the same group of driving lines and the common electrodes is not performed in the touch period of two consecutive frames.
  • the driving method in this embodiment includes multiple driving cycles, each driving cycle includes consecutive W frames; in a touch period of consecutive W frames, touch driving signals are sequentially applied to the driving lines of the W group.
  • the common electrodes of the respective regions are driven by the same number of times the touch driving voltage is applied, and the problem of uneven display and rapid aging of the liquid crystal molecules is solved to the utmost extent.
  • the common electrode may be applied to the common electrode included in the group to which the touch drive signal is not applied during the touch period of each frame.
  • the voltage signal is such that the common electrode not participating in the touch driving has a common electrode voltage required for display, and the screen display of the touch period is maintained.
  • the driving method in this embodiment further includes: applying a touch driving signal to each driving line to When the common electrode connected to the driving line is driven, the touch sensing on the M sensing electrodes included in the sensing electrode corresponding to the group of common electrodes to which the touch driving signal is applied is read in the touch period of each frame. The signal is used to determine whether there is a touch action according to the change of the touch sensing signal.
  • the odd-numbered common electrodes and the even-numbered common electrodes are alternately arranged, and the plurality of common electrodes are divided into two groups, one of which includes only odd-numbered common electrodes, and the other includes only
  • the driving method of the even-numbered row of common electrodes may specifically include:
  • the touch driving signals are applied to the even-numbered row common electrodes column by column during the touch period of the even frames.
  • each driving line has no input of the touch sensing signal, and each sensing electrode does not read the signal, and each common electrode is applied with a common electrode voltage signal required for screen display, and is used for the pixel electrode.
  • An electric field is formed to deflect the liquid crystal molecules for display on the screen.
  • FIG. 2 is an equivalent circuit diagram of the touch display device during the touch period, including the current source A, the driving line resistance R Tx , the sensing electrode resistance R Rx , the driving line (that is, the common electrode 101 ) and the sensing electrode.
  • the sensing electrodes sense the current I, output form the touch sensing signal to the detection circuit, the detection circuit amplifies the touch sensing signal, conversion, and outputs an output signal V out, whereby it is determined that a touch
  • the coordinates [X, Y] of the point at which the mutual capacitance C changes are acquired, where X indicates that the touch point is located in the area corresponding to the common electrode of the column, and Y indicates that the touch point is located in the sensing electrode of the first row.
  • the display driving period of the even frames continuous with the odd frame is entered, and the driving lines are not input by the sensing signals, and the sensing electrodes are not read signals, and the common electrodes are applied to perform the screen.
  • the desired common electrode voltage signal is displayed to form an electric field with the pixel electrode to deflect the liquid crystal molecules for display on the screen.
  • the touch driving period of the frame is entered, and Tx1', Tx2', and Tx3' in the second group of driving lines are touched one by one.
  • Driving scanning to drive the common electrodes of the second group column by column, and in the process of scanning each of the driving lines, reading the sensing signals on Rx1', Rx2', and Rx3' in the second group of sensing electrodes; It is judged whether or not each of the read sensing signals has changed. If it is, it indicates that a touch operation occurs, and the coordinates of the point at which the sensing signal changes are acquired as the touch point position. If not, it indicates that no touch operation has occurred.
  • the touch driving of the common electrodes of the first group and the second group is alternately performed, and the sensing of the first group and the second group is alternately performed.
  • the electrodes are touch sensed.

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Abstract

一种触控显示装置及其驱动方法，其中触控显示装置包括矩阵式排布的多个公共电极（101），多个公共电极（101）分为W组，每组包括M行公共电极，每行包括N个公共电极，其中W≥2，M≥1，N≥1；驱动芯片，用于在当前帧的触控时段内向一组公共电极逐列施加触控驱动信号，在下一帧的触控时段内向另一组公共电极逐列施加触控驱动信号，其中当前帧与下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。本公开实现了在相邻触控时段内对不同区域的公共电极进行触控驱动，提高了显示的均一性，解决了液晶分子易老化的问题。

Description

触控显示装置及其驱动方法 技术领域
本公开涉及显示技术领域，尤其涉及一种触控显示装置及其驱动方法。
背景技术
已知地，可以通过将触摸屏与显示屏贴合在一起，或者采用内嵌式触控(In Cell Touch)技术实现显示装置的触控功能。内嵌式触控技术即是将触控元件整合于显示屏内部，使显示屏本身就具有触控功能的技术。内嵌式触控显示装置具有在触控显示装置标准制程中即可完成触控元件的制造，没有贴合及对位的问题，产品更加轻薄，无需边框，可达全平面设计等诸多优点，是目前研究的热点之一。
内嵌式触控显示装置中，通常会通过对公共电极进行分时复用的方式实现内嵌式触控功能。具体过程为：将一帧的时间分为显示驱动时段和触控驱动时段，在显示驱动时段内，对所有公共电极施加进行画面显示所需的公共电极电压信号，在触控驱动时段内，对特定区域内的公共电极进行驱动线的扫描，对其余未参与触控驱动的公共电极仍然施加进行画面显示所需的公共电极电压信号，从而实现了画面显示和触控驱动的功能。
由于在触控驱动时段内，未参与触控驱动的公共电极上的电压为进行画面显示所需的公共电极电压信号，相应区域的画面显示正常，而参与触控驱动的公共电极上的电压为触控驱动电压，会对相应区域的画面正常显示造成一定的不利影响。当在连续帧的时间内，每帧的触控驱动时段均对固定区域的公共电极施加触控驱动电压时，造成画面显示的不均一。同时，由于持续对同一区域的公共电极施加触控驱动电压，会造成该区域内的液晶分子老化速度加快。
发明内容
本公开提供一种触控显示装置及其驱动方法，可以解决内嵌式触控显示装置画面显示不均一和液晶分子老化速度快的问题。
相应地，本公开采用如下技术方案：
一种触控显示装置，包括：矩阵式排布的多个公共电极，所述多个公共电极分为W组，每组包括M行公共电极，每行包括N个公共电极；其中，W≥2，M≥1，N≥1；与W组公共电极一一对应连接的W组驱动线，每组包括N条驱动线，所述N条驱动线分别与所述N个公共电极连接，且一组公共电极中位于同一列的公共电极与同一条驱动线连接；与W组驱动线连接的驱动芯片，所述驱动芯片用于在当前帧的显示时段内利用W组驱动线向W组公共电极同时施加公共电极电压信号，在所述当前帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，在下一帧的显示时段内利用W组驱动线向W组公共电极同时施加所述公共电极电压信号，在所述下一帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，其中，所述当前帧的触控时段内被施加触控驱动信号的公共电极与所述下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。
可选地，所述多个公共电极的排布为：包括多个重复单元，每个所述重复单元包括W行公共电极，且所述W行公共电极分别属于所述W组公共电极。
可选地，所述多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极；当所述多个公共电极分为两组时，其中一组仅包括所述奇数行公共电极，另一组仅包括所述偶数行公共电极。
可选地，所述驱动芯片还用于在每帧的触控时段内，向未被施加触控驱动信号的组所包括的公共电极同时施加所述公共电极电压信号。
可选地，所述触控显示装置还包括：与W组公共电极一一对应的W组感应电极，每组包括M条感应电极，所述M条感应电极分别与所述M行公共电极交叠；所述驱动芯片还用于在每帧的触控时段内读取与被施加触控驱动信号的一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号。
可选地，所述驱动芯片包括时序控制电路，所述时序控制电路用于控制所述公共电极电压信号与所述触控驱动信号的输入时序。
本公开还提供了一种应用于以上所述的触控显示装置的驱动方法，所述驱动方法包括：在当前帧的显示时段内向W组公共电极同时施加公共电极电压信号；在所述当前帧的触控时段内向一组公共电极逐列施加触控驱动信号； 在下一帧的显示时段内向W组公共电极同时施加所述公共电极电压信号；在所述下一帧的触控时段内向一组公共电极逐列施加触控驱动信号；其中，所述当前帧的触控时段内被施加触控驱动信号的公共电极与所述下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。
可选地，所述触控显示装置的多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极，所述多个公共电极分为两组，其中一组仅包括所述奇数行公共电极，另一组仅包括所述偶数行公共电极，所述驱动方法具体包括：在奇数帧的显示时段内向所述多个公共电极同时施加所述公共电极电压信号；在奇数帧的触控时段内向所述奇数行公共电极逐列施加所述触控驱动信号；在偶数帧的显示时段内向所述多个公共电极同时施加所述公共电极电压信号；在偶数帧的触控时段内向所述偶数行公共电极逐列施加所述触控驱动信号。
可选地，所述驱动方法还包括：在每帧的触控时段内，向未被施加所述触控驱动信号的组所包括的公共电极施加所述公共电极电压信号。
可选地，所述驱动方法还包括：在每帧的触控时段内读取与被施加触控驱动信号的一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号。
本公开所提供的触控显示装置及其驱动方法中，将公共电极分为多组，每组中每列公共电极均对应一条驱动线，每列中每个公共电极均与所对应的驱动线相连，同时将全部驱动线与一驱动芯片相连，以在当前帧的触控时段对其中一组公共电极进行驱动，在下一帧的触控时段内对与当前帧所驱动的公共电极不同组的公共电极进行驱动，即实现了在相邻触控时段内对不同区域的公共电极进行触控驱动，因此向公共电极施加高电压进行驱动影响相应区域画面正常显示的现象并不连续出现在同一区域，从而提高了内嵌式触控触控显示装置显示的均一性。此外，通过在连续的触控时段内，对不同组的公共电极进行驱动的方式，避免了持续对同一区域的公共电极施加触控驱动电压，因此也就解决了被持续施加触控驱动电压的固定区域的液晶分子易老化的问题。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本公开实施例所提供的触控显示装置的结构图；
图2为本公开实施例所提供的触控显示装置在触控时段时的等效电路图。
具体实施方式
为使本公开的上述目的、特征和优点能够更加明显易懂，下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其它实施例，均属于本发明保护的范围。
本公开实施例提供了一种触控显示装置，包括：矩阵式排布的多个公共电极，该多个公共电极分为W组，每组包括M行公共电极，每行包括N个公共电极；其中，W≥2，M≥1，N≥1；与W组公共电极一一对应连接的W组驱动线，每组包括N条驱动线，该N条驱动线分别与前述N个公共电极连接，且一组公共电极中位于同一列的公共电极与同一条驱动线连接；与W组驱动线连接的驱动芯片，驱动芯片用于在当前帧的显示时段内利用W组驱动线向W组公共电极同时施加公共电极电压信号，在当前帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，在下一帧的显示时段内利用W组驱动线向W组公共电极同时施加公共电极电压信号，在下一帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，其中，当前帧的触控时段内被施加触控驱动信号的公共电极与下一帧的触控时段内被施加所述触控驱动信号的公共电极属于不同组。
由于TFT(Thin Film Transistor，薄膜晶体管)在关断时会有轻微漏电，因此当在一帧的触控时段内，虽然TFT被关断，但是像素电极上仍然会具有一定的电压，此时对公共电极施加高电平的触控驱动信号，就会使得该区域液晶分子从正常显示所需的偏转状态发生变化，变得异常，进而对该区域的画面显示产生不良影响。若在连续帧画面的每帧的触控时段均对同一区域的 公共电极进行触控驱动，那么这种不良影响就会累积，造成该区域画面显示异常；同时触控时段未参与触控驱动的公共电极上的电压为画面正常显示所需的电压，该部分公共电极所对应区域的画面显示正常；通常情况下，参与触控驱动与未参与触控驱动的公共电极交错排布，从而正常显示区域与异常显示区域交错，造成画面显示均一性下降。
不同于已知的从全部的公共电极中选取特定区域的一部分的公共电极作为驱动线进行触控驱动的复用，本实施例中，将通过驱动线与驱动芯片相连的公共电极分成多组，在一个触控时段内对一组公共电极进行触控驱动，利用控制芯片可控制在连续的触控时段内对不同组的公共电极进行触控驱动，从而避免了连续对固定区域的公共电极进行触控驱动，即实现了在连续帧的触控时段内对公共电极的换区域驱动，使同一区域内对公共电极施加触控驱动电平对画面显示所产生的不良影响仅持续一个触控时段，下一触控时段该不良影响出现在其它区域，因此该不良影响无法累积，从而极大地提高了内嵌式触控触控显示装置画面显示均一性，提高了画面显示效果。
另一方面，由于本实施例中的上述触控显示装置实现了在连续帧的触控时段内对公共电极的换区域驱动，避免了连续对固定区域的公共电极施加触控驱动电压造成该区域液晶分子易老化的问题，相当于将触控驱动电压对液晶分子的不良影响平均分配到每个区域的液晶分子，降低了液晶分子的老化速度。
本实施例中，基于对触控功能均匀性的考虑，可使多个公共电极的排布为：包括多个重复单元，每个重复单元包括W行公共电极，且该W行公共电极分别属于W组公共电极，即各组内各行公共电极在基板上的分布均匀，不同组不同行的公共电极交替周期性排布。更具体来说，若W组公共电极分别为第1组、第2组、…、第w组，属于第1组的一行公共电极为Com[1]，属于第2组的一行公共电极为Com[2]，…，属于第w组的一行公共电极为Com[w]，则可按Com[1]、Com[2]、…、Com[w]、Com[1]、Com[2]、…、Com[w]、…的顺序周期性逐行排列，Com[1]、Com[2]、…、Com[w]共w行公共电极为一重复单元，M个重复单元并排。对上述排布的公共电极进行触控驱动时，在第1帧的触控时段，向第1组公共电极的M行Com[1]施加触控驱动信号；在第2帧的触控时段，向第2组公共电极的M行Com[2]施加触控驱动信号；…；在第w帧的触控时段，向第w组公共电极的M行Com[w]施加触控 驱动信号，至此实现了在连续的w帧内对全部公共电极的扫描驱动。
基于上述可选方案，本实施例中，对将公共电极所分成的组的数量并不限定，可根据实际所需要的触控精度确定。若所需要的触控精度较高，则可相应减少公共电极的组数，当W＝2，即将公共电极分为两组时，所能达到的触控精度高，具体的，当多个公共电极分为两组时，其中一组仅包括奇数行公共电极，另一组仅包括偶数行公共电极(多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极)；若所需要的触控精度并不是很高，则可将增多公共电极的组数。
下面以将公共电极分为两组(即W＝2)，且一组仅包括奇数行公共电极，另一组仅包括偶数行公共电极的情况为例，对本实施所提供的触控显示装置的具体连接结构进行说明。
如图1所示，假设基板上的公共电极101排布成6行3列，分为两组：第1组包括奇数行(即第1行、第3行和第5行)的公共电极，第2组包括偶数行(即第2行、第4行和第6行)的公共电极，即M＝3，N＝3。驱动线包括6条，分为两组：第1组包括Tx1、Tx2和Tx3，第2组包括Tx1′、Tx2′和Tx3′，其中，Tx1与属于第1列且属于奇数行的3个公共电极相连，Tx2与属于第2列且属于奇数行的3个公共电极相连，Tx3与属于第3列且属于奇数行的3个公共电极相连，Tx1′与属于第1列且属于偶数行的3个公共电极相连，Tx2′与属于第2列且属于偶数行的3个公共电极相连，Tx3′与属于第3列且属于偶数行的3个公共电极相连。
在奇数帧的触控时段内，第1组公共电极参与触控驱动，通过对第1组驱动线中的Tx1、Tx2和Tx3逐条施加触控驱动信号，实现对各列中属于奇数行的公共电极的逐列驱动。
在与上述奇数帧连续的偶数帧的触控时段内，第2组公共电极参与触控驱动，通过对第2组驱动线中的Tx1′、Tx2′和Tx3′逐条施加触控驱动信号，实现对各列中属于偶数行的公共电极的逐列驱动。
需要说明的是，本实施例仅以M＝3，N＝3的情况为例，对触控显示装置的结构进行说明，显然，在实际的触控显示装置中，公共电极的数目比图1所示出的数目多得多，因而M和N的数值也会远大于3，本领域的技术人员能够通过上述电路结构变形得到实际所需要的触控显示装置。
另外，驱动线可选地通过过孔与需要连接的公共电极101相连，以避免 与其它不需要连接的公共电极相连；驱动线的相交处设置有绝缘层，以避免各驱动线发生电连接。
本实施例中所述的驱动芯片还用于在触控时段内，向未被施加触控驱动信号的组所包括的公共电极同时施加公共电极电压信号，以使未参与触控驱动的公共电极具有进行显示所需的公共电极电压，维持画面正常显示。
上述驱动芯片可包括时序控制电路，用于控制公共电极电压信号与触控驱动信号的输入时序，该时序控制电路例如可为计数器。
在利用驱动线对公共电极进行驱动后，还需要感知参与触控驱动的公共电极相应区域上的信号变化，因此本实施例所提供的触控显示装置还包括：与W组公共电极一一对应的W组感应电极，每组包括M条感应电极，该M条感应电极分别与M行公共电极交叠；相对应的，驱动芯片还用于在每帧的触控时段内读取与被施加触控驱动信号一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号。
具体到图1所示出的触控显示装置中，感应电极包括6条，分为两组：第1组包括Rx1、Rx2和Rx3，对应第1组公共电极和第1组驱动线，第2组包括Rx1′、Rx2′和Rx3′，对应第2组公共电极和第2组驱动线。其中，Rx1与第1行的3个公共电极交叠，Rx2与第3行的3个公共电极交叠，Rx3与第5行的3个公共电极交叠，Rx1′与第2行的3个公共电极交叠，Rx2′与第4行的3个公共电极交叠，Rx3′与第6行的3个公共电极交叠。
当对Tx1施加触控驱动信号，驱动第1列的第1、3和5个公共电极时，逐行读取与前述3个公共电极交叠的、第1组的3条感应电极Rx1、Rx2和Rx3上的感应信号，以根据触控感应信号的变化情况判断判断是否有触摸动作。其它驱动线驱动时，感应电极的工作过程同理可推得，在此不一一赘述。
需要说明的是，感应电极与公共电极101之间相互绝缘，以在二者之间形成互电容。当有触摸动作时，该互电容会发生变化，从感应电极读取的触控感应信号能够表征该互电容，因此通过感知触控感应信号的变化可得到是否有触控动作的信息。
另外，图1中为了清楚的表示出驱动线与公共电极之间的连接关系，对感应电极进行了透明化处理。
本实施例所提供的触控显示装置可为ADS(Advanced Super Dimension Switch，高级超维场转换)型、TN(Twisted Nematic，扭曲向列)型、MVA (Multi-domain Vertical Alignment，多畴垂直定向)型、PVA(Patterned Vertical Alignment，图像垂直定向)型、IPS(In-Plane Switching，平面转换)型、FFS(Fringe Field Switching，边界电场切换)型等类型的液晶触控显示装置；具体的可以为电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本实施例还提供了一种触控显示装置的驱动方法，应用于本实施例所提供的触控显示装置。该驱动方法包括：
在当前帧的显示时段内向W组公共电极同时施加公共电极电压信号；
在当前帧的触控时段内向一组公共电极逐列施加触控驱动信号；
在下一帧的显示时段内向W组公共电极同时施加公共电极电压信号；
在下一帧的触控时段内向一组公共电极逐列施加触控驱动信号。
其中，当前帧的触控时段内被施加触控驱动信号的公共电极与下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。
上述驱动方法通过在当前帧的触控时段驱动一组公共电极，在下一帧的触控时段驱动另外一组公共电极，实现了在连续帧的触控时段内对公共电极的换区域驱动，避免了连续对固定区域的公共电极进行触控驱动所带来的显示不均一和液晶分子老化速度快的问题，提高了内嵌式触控触控显示装置的显示均一性，延长了液晶分子寿命。
本实施例所提供的驱动方法中，一帧的触控时段对一组驱动线和相对应的一组公共电极进行驱动，至于在每帧的触控时段中具体哪组驱动线和公共电极参与触控驱动，本实施例并不限定，只要不在连续的两帧的触控时段内对同一组驱动线和公共电极进行触控驱动即可。可选地，本实施例中的驱动方法包括多个驱动周期，每个驱动周期包括连续的W帧；在连续的W帧的触控时段内，依次对W组的驱动线施加触控驱动信号，以驱动W组的公共电极，以使各个区域的公共电极被施加触控驱动电压驱动的次数相同，最大限度的解决显示不均一和液晶分子老化快的问题。
在触控时段内，在对参与触控驱动的公共电极施加触控驱动信号的同时，在每帧的触控时段内可向未被施加触控驱动信号的组所包括的公共电极施加公共电极电压信号，以使未参与触控驱动的公共电极具有进行显示所需的公共电极电压，维持触控时段的画面显示。
本实施例中的驱动方法还包括：在对每条驱动线施加触控驱动信号，以 驱动与驱动线连接的公共电极时，在每帧的触控时段内读取与被施加触控驱动信号的一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号，以根据该触控感应信号的变化判断是否有触控动作。
当所驱动的触控显示装置的多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极，多个公共电极分为两组，其中一组仅包括奇数行公共电极，另一组仅包括偶数行公共电极时，其驱动方法具体可包括：
在奇数帧的显示时段内向多个公共电极同时施加公共电极电压信号；
在奇数帧的触控时段内向奇数行公共电极逐列施加触控驱动信号；
在偶数帧的显示时段内向多个公共电极同时施加公共电极电压信号；
在偶数帧的触控时段内向偶数行公共电极逐列施加触控驱动信号。
下面结合图1和图2对该触控显示装置的驱动方法进行详细介绍。
在奇数帧的显示驱动时段，各驱动线没有触控感应信号的输入，各感应电极也不读取信号，各个公共电极均被施加进行画面显示所需的公共电极电压信号，用以与像素电极形成电场，使液晶分子发生偏转，进行画面显示。显示驱动时段结束后，进入该帧的触控驱动时段，逐条对第1组驱动线中的Tx1、Tx2和Tx3进行触控驱动扫描，以逐列驱动第1组的公共电极，且在对每条驱动线扫描的过程中，完成第1组感应电极中的Rx1、Rx2和Rx3上的感应信号的读取。图2示出了触控显示装置在触控时段的等效电路图，包括电流源A、驱动线电阻RTx、感应电极电阻RRx、驱动线(也即公共电极101)与感应电极之间的互电容C、检测电路和驱动线、感应电极与公共电极所在膜层间的寄生电容C′；当手指触摸屏幕时，一部分电流流入手指，等效为互电容C发生改变，会有一微小的电流I经过感应电极，感应电极感知该电流I，形成触控感应信号输出给检测电路，检测电路将该触控感应信号进行放大、转换等处理，输出一输出信号Vout，据此判断出有触摸动作，之后采集互电容C发生改变的点的坐标[X，Y]，其中X表示触摸点位于第几列公共电极对应的区域，Y表示触摸点位于第几行感应电极。
上述奇数帧的时间结束后，进入与该奇数帧连续的偶数帧的显示驱动时段，各驱动线没有触控感应信号的输入，各感应电极也不读取信号，各个公共电极均被施加进行画面显示所需的公共电极电压信号，用以与像素电极形成电场，使液晶分子发生偏转，进行画面显示。显示驱动时段结束后，进入该帧的触控驱动时段，逐条对第2组驱动线中的Tx1′、Tx2′和Tx3′进行触控 驱动扫描，以逐列驱动第2组的公共电极，且在对每条驱动线扫描的过程中，完成第2组感应电极中的Rx1′、Rx2′和Rx3′上的感应信号的读取；判断所读取的各个感应信号是否发生变化，如果是，则表示有触摸动作发生，采集感应信号发生变化的点的坐标，作为触摸点位置，如果否，则表示没有触摸动作发生。
通过上述过程，在连续的一个奇数帧与一个偶数帧的驱动周期内，实现了交替对第1组和第2组的公共电极进行触控驱动，且交替对第1组和第2组的感应电极进行触控感应。
以上所述仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭示的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。
本申请要求于2014年8月22日递交的中国专利申请第201410419204.9号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (10)

  1. 一种触控显示装置，包括：
    矩阵式排布的多个公共电极，所述多个公共电极分为W组，每组包括M行公共电极，每行包括N个公共电极；其中，W≥2，M≥1，N≥1；
    与W组公共电极一一对应连接的W组驱动线，每组包括N条驱动线，所述N条驱动线分别与所述N个公共电极连接，且一组公共电极中位于同一列的公共电极与同一条所述驱动线连接；
    与所述W组驱动线连接的驱动芯片，所述驱动芯片用于在当前帧的显示时段内利用W组驱动线向W组公共电极同时施加公共电极电压信号，在所述当前帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，在下一帧的显示时段内利用W组驱动线向W组公共电极同时施加所述公共电极电压信号，在所述下一帧的触控时段内利用一组驱动线向与其对应连接的一组公共电极逐列施加触控驱动信号，其中，所述当前帧的触控时段内被施加触控驱动信号的公共电极与所述下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。
  2. 根据权利要求1所述的触控显示装置，其中，所述多个公共电极的排布为：包括多个重复单元，每个重复单元包括W行公共电极，且所述W行公共电极分别属于所述W组公共电极。
  3. 根据权利要求2所述的触控显示装置，其中，所述多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极；当所述多个公共电极分为两组时，其中一组仅包括所述奇数行公共电极，另一组仅包括所述偶数行公共电极。
  4. 根据权利要求1-3任一项所述的触控显示装置，所述驱动芯片还用于在每帧的触控时段内，向未被施加触控驱动信号的组所包括的公共电极同时施加所述公共电极电压信号。
  5. 根据权利要求1-4任一项所述的触控显示装置，还包括：与W组公共电极一一对应的W组感应电极，每组包括M条感应电极，所述M条感应电极分别与所述M行公共电极交叠；
    所述驱动芯片还用于在每帧的触控时段内读取与被施加触控驱动信号的 一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号。
  6. 根据权利要求1-5任一项所述的触控显示装置，其中，所述驱动芯片包括时序控制电路，所述时序控制电路用于控制所述公共电极电压信号与所述触控驱动信号的输入时序。
  7. 一种应用于权利要求1-6任一项所述的触控显示装置的驱动方法，所述驱动方法包括：
    在当前帧的显示时段内向W组公共电极同时施加公共电极电压信号；
    在所述当前帧的触控时段内向一组公共电极逐列施加触控驱动信号；
    在下一帧的显示时段内向W组公共电极同时施加所述公共电极电压信号；
    在所述下一帧的触控时段内向一组公共电极逐列施加触控驱动信号；
    其中，所述当前帧的触控时段内被施加触控驱动信号的公共电极与所述下一帧的触控时段内被施加触控驱动信号的公共电极属于不同组。
  8. 根据权利要求7所述的驱动方法，其中，所述触控显示装置的多个公共电极包括交替排列的奇数行公共电极与偶数行公共电极，所述多个公共电极分为两组，其中一组仅包括所述奇数行公共电极，另一组仅包括所述偶数行公共电极，所述驱动方法还包括：
    在奇数帧的显示时段内向所述多个公共电极同时施加所述公共电极电压信号；
    在奇数帧的触控时段内向所述奇数行公共电极逐列施加触控驱动信号；
    在偶数帧的显示时段内向所述多个公共电极同时施加所述公共电极电压信号；
    在偶数帧的触控时段内向所述偶数行公共电极逐列施加触控驱动信号。
  9. 根据权利要求7或8所述的驱动方法，还包括：在每帧的触控时段内，向未被施加触控驱动信号的组所包括的公共电极施加所述公共电极电压信号。
  10. 根据权利要求7-9任一项所述的驱动方法，还包括：在每帧的触控时段内读取与被施加触控驱动信号的一组公共电极对应的一组感应电极所包括的M条感应电极上的触控感应信号。
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