WO2017000432A1 - 一种内嵌式触控显示屏及其驱动方法、显示装置 - Google Patents

一种内嵌式触控显示屏及其驱动方法、显示装置 Download PDF

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Publication number
WO2017000432A1
WO2017000432A1 PCT/CN2015/092286 CN2015092286W WO2017000432A1 WO 2017000432 A1 WO2017000432 A1 WO 2017000432A1 CN 2015092286 W CN2015092286 W CN 2015092286W WO 2017000432 A1 WO2017000432 A1 WO 2017000432A1
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WIPO (PCT)
Prior art keywords
touch
display screen
common electrode
line
touch display
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PCT/CN2015/092286
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English (en)
French (fr)
Inventor
丁小梁
董学
王海生
陈小川
刘红娟
杨盛际
刘英明
赵卫杰
李昌峰
刘伟
王磊
许睿
任涛
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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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/037,802 priority Critical patent/US20170168618A1/en
Priority to EP15896600.2A priority patent/EP3316237B1/en
Publication of WO2017000432A1 publication Critical patent/WO2017000432A1/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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user

Definitions

  • the present invention relates to the field of displays, and in particular, to an in-cell touch display screen, a driving method thereof, and a display device.
  • the touch screen is an input device that provides a better interactive experience for the user than the keyboard and mouse.
  • the touch screen can be divided into resistive type, capacitive type, surface acoustic wave type, infrared type and the like.
  • resistive and capacitive touch screen technologies are widely used.
  • Capacitive touch screens are receiving more and more attention due to their high sensitivity and the advantages of multi-touch.
  • the basic principle of a capacitive touch screen is to apply a driving voltage on the driving signal line and detect a change in the signal on the sensing signal line.
  • the drive signal line determines the coordinates in the X-axis direction
  • the sense signal line determines the coordinates in the Y-axis direction.
  • the intersection of each of the driving signal lines and the sensing signal lines corresponds to a corresponding coordinate.
  • the X-axis direction driving signal lines are progressively scanned, and when each row of driving signal lines is scanned, the signals on each sensing signal line are read. With one round of scanning, each intersection can be scanned.
  • FIG. 1 is a schematic diagram of a detection principle of a touch screen in the prior art, wherein 101 represents a signal source, 103 represents a resistance of a driving signal line, 102 represents a mutual capacitance between a driving signal line and a sensing signal line, and 104 represents a driving signal line.
  • the parasitic capacitance between the common electrode layer, 105 is the parasitic capacitance between the sensing signal line and the common electrode layer, 106 is the resistance of the sensing signal line, and 107 is the detecting circuit.
  • a part of the current is sucked away by the finger, which is equivalent to the mutual capacitance 102 between the driving signal line and the sensing signal line.
  • a weak current change due to the current drawn by the finger can be detected to determine the touch position.
  • the most widely used capacitive touch screen is an add-on touch screen, that is, the touch panel is produced separately from the liquid crystal display (LCD) and then attached together.
  • LCD liquid crystal display
  • the use of such prior art touch screens is limited due to a series of reasons such as high manufacturing cost, low light transmittance, and large module thickness.
  • the embodiment of the invention provides an in-cell touch display screen, a driving method thereof and a display device, which realize thinning of the screen thickness, reduction of manufacturing cost and improvement of light transmittance.
  • an in-cell touch display screen includes: a color filter substrate; and an array substrate including data lines and gate lines, a plurality of connection lines, and a plurality of common electrodes that are insulated from each other a region, each of the plurality of common electrode regions including a plurality of common electrode blocks arranged in a matrix, and a plurality of common electrode blocks in each of the common electrode regions are connected to each other by a corresponding one of the plurality of connection lines;
  • each common electrode region is supplied with a common electrode signal through the corresponding one of the connection lines, and the data line is supplied with a corresponding data signal, and wherein
  • a plurality of common electrode blocks in each common electrode region are used as touch drive electrodes, and a touch drive signal is supplied through the corresponding one of the connection lines, and At least a portion of the data lines are used as touch sensing signal lines for transmitting the generated touch sensing signals.
  • each of the plurality of common electrode regions comprises one or more rows of common electrode blocks arranged in a matrix.
  • the array substrate further includes a plurality of sub-pixel units, each of the plurality of sub-pixel units includes a pixel electrode, and wherein each of the common electrode blocks corresponds to a corresponding pixel electrode.
  • each of the common electrodes does not overlap with a projection of the data lines and gate lines on the array substrate.
  • the common electrode block is disposed in the same layer as the gate line or the data line.
  • the connecting line is disposed in the same layer as the common electrode block; or the connecting line is located above the common electrode block; or the connecting line is located below the common electrode block.
  • the connecting line is in the same layer and insulated from the gate line.
  • the connecting wire is a metal material.
  • the touch display screen further includes a plurality of touch driving signal channels for supplying the touch driving signals to the plurality of connecting lines, and each touch driving signal channel is connected to the at least one connecting line.
  • the touch display screen further includes a touch sense for being used from the data line.
  • the at least one part of the signal line obtains the plurality of touch sensing signal channels of the generated touch sensing signal, and each of the touch sensing signal channels is connected to the at least one data line.
  • the number of the plurality of touch driving signal channels and the plurality of touch sensing signal channels is determined according to a required touch precision.
  • the touch display screen further includes a plurality of switching elements for selectively acting according to whether the touch display screen is in a display stage or a touch stage, so that the data line is used as a touch
  • the at least a portion of the sensed signal line is supplied with a data signal during the display phase and the generated touch sense signal is transmitted during the touch phase.
  • each of the plurality of switching elements is an analog switch.
  • a method for driving an in-cell touch display screen further comprising: supplying a common electrode when the touch display screen is in a display phase Signaling to the connection line and supplying a data signal to the data line; and when the touch display screen is in a touch phase, supplying a touch drive signal to the connection line, and passing through the data line
  • the at least one portion of the touch sensing signal line transmits the generated touch sensing signal.
  • a display device comprising the in-cell touch display screen according to the first aspect.
  • the embodiment of the present invention has the following advantages: the common electrode block is multiplexed into the touch driving electrode, and the data line is multiplexed into the touch sensing signal line, thereby reducing the thickness of the touch screen and increasing the transmittance of the screen. And reduce manufacturing costs.
  • FIG. 1 is a schematic diagram of a detection principle of a touch screen in the prior art
  • FIG. 2 is a schematic structural diagram of an in-cell touch display screen according to an embodiment of the invention.
  • FIG. 3 is a top plan view of a common electrode region in an in-cell touch display screen according to an embodiment of the invention.
  • FIG. 4 is a top plan view of a common electrode region in another in-cell touch display screen according to an embodiment of the invention.
  • FIG. 5 is a schematic diagram of a trace of a gate line and a connection line in an in-cell touch display screen according to an embodiment of the invention
  • FIG. 6 is a schematic structural diagram of an in-cell touch display screen according to an embodiment of the invention.
  • FIG. 7 is a display/touch work of an in-cell touch display screen according to an embodiment of the invention. Schematic diagram of the structure of the switchable components
  • FIG. 8 is a flowchart of a driving method of an in-cell touch display screen according to an embodiment of the invention.
  • FIG. 9 is a waveform diagram of a touch driving signal and a common electrode signal for an in-cell touch display screen according to an embodiment of the invention.
  • FIG. 2 is a schematic structural diagram of an in-cell touch display screen according to an embodiment of the invention.
  • the in-cell touch display can be based on an In-Plane Switch (IPS) technology or an Advanced Super Dimension Switch (ADS) technology in which a common electrode is disposed on the array substrate.
  • the touch display screen may include an array substrate and a color filter substrate (not shown).
  • the array substrate includes data lines 21 and gate lines 22 that are insulated from each other, a plurality of connection lines 25, and a plurality of common electrode regions 23.
  • Each of the common electrode regions 23 includes a plurality of common electrode blocks 24 arranged in a matrix, and a plurality of common electrode blocks 24 in each of the common electrode regions 23 are connected by a corresponding connecting line 25.
  • each common electrode region 23 is supplied with a common electrode signal through a corresponding connection line 25, and the data line 21 is supplied with a corresponding data signal.
  • the public electrode block 24 in each common electrode region 23 serves as a touch driving electrode, and is supplied with a touch driving signal through a corresponding connecting line 25, and in the data line 21 At least a portion is used as a touch sensing signal line for transmitting the generated touch sensing signal.
  • the common electrode is divided into blocks in units of sub-pixel units, and each common electrode block may correspond to a pixel electrode of one corresponding sub-pixel unit.
  • the sub-pixel unit is a region surrounded by data lines and gate lines which are insulated from each other.
  • Each sub-pixel unit includes a thin film transistor (TFT) having a gate connected to the gate line and a source connected to the data line. The drain is connected to the pixel electrode. Since the common electrode is divided into blocks, the loading of each data line is small, so that the in-cell touch display screen can be adapted to the application of a large-sized panel; however, embodiments of the present invention are not limited to large sizes. Panel application.
  • each common electrode region 23 includes a row of a common matrix arrangement. Electrode block 24. In the example shown in FIG. 4, each common electrode region 23 includes three rows of common electrode blocks 24 arranged in a matrix. Of course, each common electrode region 23 may include more or fewer rows of common electrode blocks 24. In particular, the projection of each of the common electrode blocks 24 and the data lines 21 and the gate lines 22 on the array substrate may not overlap. This helps to reduce the parasitic capacitance between the common electrode block 24 and the data line 21 and the parasitic capacitance between the common electrode block 24 and the gate line 22.
  • the common electrode block 24 is multiplexed as a touch driving electrode, and (at least a part of) the data line 21 is multiplexed into a touch sensing signal line, the touch driving electrode and the touch sensing signal line are also reduced.
  • the parasitic capacitance between the two, and thus the delay generated when the touch driving electrode transmits the touch driving signal improves the accuracy of the touch detection.
  • the data line does not affect the aperture ratio of the display screen, so multiplexing the data lines into the touch sensing signal lines does not affect the aperture ratio of the touch screen.
  • the common electrode block 24 is disposed in one-to-one correspondence with the pixel electrodes, it is not necessary to add an additional mask and thus reduce the production cost.
  • the common electrode block 24 may be disposed in the same layer as the gate line 22.
  • the common electrode block 24 may be disposed in the same layer as the data line 21.
  • the connection line 25 may be disposed in the same layer as the common electrode block 24; alternatively, the connection line 25 may be located above or below the common electrode block 24. There is no need to provide an insulating layer between the common electrode block 24 and the connecting line 25, and the two can be directly connected.
  • each row of the common electrode blocks 24 may be connected through the via holes and the connection lines 25.
  • the connection line 25 may also be provided in the same layer and insulated from the gate line 22, in which case the connection line 25 may have the same metal material as the gate line 22, such as aluminum, copper, or the like.
  • FIG. 5 is a schematic diagram of a trace of a gate line and a connection line in an in-cell touch display screen according to an embodiment of the invention.
  • connection line 25 and the gate line 22 When the connection line 25 and the gate line 22 are disposed on the same layer, they may come into contact with each other. As shown in FIG. 5, there is an intersection region T between the first connection line 25 and the second gate line 22.
  • the gate line 22 or the connection line 25 may be connected in a jumper manner through the source/drain metal layer of the TFT at the T region.
  • the gate line 22 may be made to jump through the source/drain metal layer of the TFT at the T region, or the connection line 25 may be jumped through the source/drain metal layer of the TFT at the T region.
  • FIG. 6 is a schematic structural diagram of an in-cell touch display screen according to an embodiment of the invention.
  • the touch display screen further includes a plurality of touch driving signal channels 26 for supplying touch driving signals and a plurality of touch sensing signal channels 27 for acquiring the generated touch sensing signals.
  • One touch drive signal path 26 can be connected to one or more (adjacent) connection lines 25, and one touch sense signal path 27 can be connected to one or more (adjacent) data lines 21.
  • the first row and the second row of connecting lines 25 are connected to one touch driving signal channel 26, and the data lines 21 of the third and fourth columns are connected to one touch sensing signal channel 27.
  • the number of touch driving signal channels 26 and the number of connecting lines 25 connected to each touch driving signal channel 26 can be determined according to the required touch precision.
  • a touch drive signal channel 26 can be connected to a plurality of adjacent connection lines 25 such that the distance between the first connection line connecting the touch drive signal path 26 and the last connection line is 5 mm. 7mm.
  • m is the distance between the first connection line connecting one touch drive signal channel to the last connection line
  • n is the distance between two adjacent connection lines
  • x represents a touch drive is required.
  • d denote the distance between the adjacent two columns of data lines
  • e denote the distance between the first column data line connecting the touch sense signal channel 27 to the last column data line
  • f denotes a connection touch
  • FIG. 7 is a schematic structural diagram of a display/touch function switching component of an in-cell touch display screen according to an embodiment of the invention.
  • the example shown in FIG. 6 is continued in which the third column data line and the fourth column data line are multiplexed into touch sensing signal lines.
  • the display/touch function switching component may be the switching element 81.
  • the switching element 81 selectively acts depending on whether the display screen is in the display phase or the touch phase, such that at least a portion of the data line 21 serving as the touch sensing signal line is supplied with the data signal during the display phase and during the touch phase The generated touch sensing signal is transmitted.
  • the switching element 81 when the touch display screen is in the display phase, the switching element 81 is controlled by the driving circuit to supply the data signal to the corresponding data line 21, and when the touch display screen is in the touch phase, the switching element 81 is controlled by the driving circuit.
  • the corresponding data line 21 is connected to the touch sensing signal channel to transmit the generated touch sensing signal.
  • a display device comprising The in-cell touch display. Details of the in-cell touch display screen are described above and will not be discussed in detail herein.
  • FIG. 8 is a flowchart of a driving method of an in-cell touch display screen according to an embodiment of the invention. As shown in Figure 8, the method includes:
  • the touch driving signal is supplied to the connection line, and the generated touch sensing signal is transmitted through the at least a part of the data line used as the touch sensing signal line.
  • FIG. 9 is a waveform diagram of a touch driving signal and a common electrode signal for an in-cell touch display screen according to an embodiment of the invention.
  • the touch driving signal channel receives the common electrode signal (Vcom) provided by the driving circuit, and supplies the display voltage to the common electrode block connected to the touch driving signal channel;
  • the touch drive signal channel receives the touch drive signal provided by the drive circuit (which is shown as a square wave signal in the figure) for common to the touch drive signal channel.
  • the electrode block supplies a touch drive signal.
  • the period of each frame (V-sync) for the touch display is divided into a display phase and a touch phase. For example, if the time of displaying one frame of the touch display screen is 16.7 ms, 5 ms can be selected as the touch stage, and the other 11.7 ms is used as the display stage. Other alternatives are also possible.

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Abstract

一种内嵌式触控显示屏及其驱动方法、显示装置。当触控显示屏处于显示阶段时，每个公共电极区域（23）通过相应的一个连接线（25）被供应一个公共电极信号，并且数据线（21）被供应相应的数据信号。当触控显示屏处于触控阶段时，每个公共电极区域（23）中的多个公共电极块（24）用作触控驱动电极，并通过相应的一个连接线（25）被供应一个触控驱动信号，并且数据线（21）中的至少一部分用作触控感测信号线用于传送所生成的触控感测信号。公共电极块（24）被复用为触控驱动电极，并且数据线（21）被复用为触控感测信号线，从而减少了触摸屏的厚度，增加了屏幕的透光率，并且降低了制造成本。

Description

一种内嵌式触控显示屏及其驱动方法、显示装置 技术领域
本发明涉及显示器领域，尤其涉及一种内嵌式(in-cell)触控显示屏及其驱动方法、显示装置。
背景技术
目前，触摸屏作为一种输入设备，相比于键盘和鼠标为使用者带来了更好的交互体验。触摸屏根据实现原理，可以分为电阻式、电容式、表面声波式、红外式等。目前被广泛使用的是电阻式和电容式触摸屏技术。
电容式触摸屏凭借其较高的灵敏度以及多点触控的优点，受到越来越多的关注。电容式触摸屏的基本原理为：在驱动信号线上加驱动电压，在感测信号线上检测信号的变化。驱动信号线确定X轴方向的坐标，感测信号线确定Y轴方向的坐标。这样，每一驱动信号线和感测信号线的交点均对应一个相应的坐标。在触控阶段，对X轴方向驱动信号线进行逐行扫描，并且在扫描每一行驱动信号线时，均读取每条感测信号线上的信号。通过一轮的扫描，就可以把每个交点都扫描到。假设共扫描x*y次，其中x代表驱动信号线的个数，y代表感测信号线的个数，则感测信号线与驱动信号线的交点共有x*y个。采用这种检测方式可以确定多点的坐标，进而可以实现多点触摸。图1为现有技术的一种触摸屏的检测原理示意图，其中101代表信号源，103代表驱动信号线的电阻，102代表驱动信号线与感测信号线之间的互电容，104为驱动信号线与公共电极层间的寄生电容，105为感测信号线与公共电极层间的寄生电容，106为感测信号线的电阻，107为检测电路。当手指触摸触摸屏时，有一部分电流被手指吸走，等效为驱动信号线与感测信号线之间的互电容102发生改变。在检测电路107端可以检测由于手指吸走的电流导致的微弱电流变化，从而确定触控位置。
然而，目前应用最广的电容式触摸屏为外挂式(add-on)的触摸屏，也就是触摸面板与液晶显示器(LCD)分开生产，然后贴合到一起。由于制造成本高、透光率低、模组厚度大等一系列原因，限制了这样的现有技术触摸屏的使用。
发明内容
本发明实施例提供了一种内嵌式触控显示屏及其驱动方法、显示装置，其实现了屏幕厚度变薄、制造成本降低以及透光率的提高。
根据本发明的第一方面，提供了一种内嵌式触控显示屏，包括：彩膜基板；以及阵列基板，包括相互绝缘交叉的数据线和栅线、多个连接线以及多个公共电极区域，所述多个公共电极区域中的每一个包括矩阵排列的多个公共电极块，每个公共电极区域中的多个公共电极块由所述多个连接线中的相应一个相互连接；其中，当所述触控显示屏处于显示阶段时，每个公共电极区域通过所述相应的一个连接线被供应一个公共电极信号，并且所述数据线被供应相应的数据信号，并且其中，当所述触控显示屏处于触控阶段时，每个公共电极区域中的多个公共电极块用作触控驱动电极，并通过所述相应的一个连接线被供应一个触控驱动信号，并且所述数据线中的至少一部分用作触控感测信号线用于传送所生成的触控感测信号。
可选地，所述多个公共电极区域中的每一个包括矩阵排列的一行或多行公共电极块。
可选地，所述阵列基板还包括多个亚像素单元，该多个亚像素单元中的每一个包括像素电极，并且其中，所述公共电极块中的每一个与一个相应的像素电极对应。
可选地，所述公共电极中的每一个与所述数据线和栅线在所述阵列基板上的投影均不重叠。
可选地，所述公共电极块与所述栅线或者数据线同层设置。
可选地，所述连接线与所述公共电极块同层设置；或者，所述连接线位于所述公共电极块的上方；或者，所述连接线位于所述公共电极块的下方。
可选地，所述连接线与所述栅线同层且绝缘设置。
可选地，所述连接线为金属材料。
可选地，所述触控显示屏还包括用于向所述多个连接线供应触控驱动信号的多个触控驱动信号通道，每个触控驱动信号通道连接至少一个连接线。
可选地，所述触控显示屏还包括用于从所述数据线中用作触控感 测信号线的所述至少一部分获取所生成的触控感测信号的多个触控感测信号通道，每个触控感测信号通道连接至少一个数据线。
可选地，所述多个触控驱动信号通道和多个触控感测信号通道的个数根据所需的触控精度确定。
可选地，所述触控显示屏还包括多个开关元件，其用于取决于所述触控显示屏处于显示阶段还是触控阶段而选择性地动作，使得所述数据线中用作触控感测信号线的所述至少一部分在显示阶段被供应数据信号并且在触控阶段传送所生成的触控感测信号。
可选地，所述多个开关元件中的每一个为模拟开关。
根据本发明的第二方面，还提供了一种用于驱动如第一方面所述的内嵌式触控显示屏的方法，包括：当所述触控显示屏处于显示阶段时，供应公共电极信号给所述连接线，并且供应数据信号给所述数据线；以及当所述触控显示屏处于触控阶段时，供应触控驱动信号给所述连接线，并且通过所述数据线中用作触控感测信号线的所述至少一部分传送所生成的触控感测信号。
根据本发明的第三方面，还提供了一种显示装置，包括如第一方面所述的内嵌式触控显示屏。
本发明的实施例具有以下优点：公共电极块被复用为触控驱动电极，并且数据线被复用为触控感测信号线，从而减少了触摸屏的厚度，增加了屏幕的透光率，并且降低了制造成本。
附图说明
图1为现有技术的一种触摸屏的检测原理示意图；
图2为根据本发明实施例的一种内嵌式触控显示屏的结构示意图；
图3为根据本发明实施例的一种内嵌式触控显示屏中的公共电极区域的俯视示意图；
图4为根据本发明实施例的另一种内嵌式触控显示屏中的公共电极区域的俯视示意图；
图5为根据本发明实施例的一种内嵌式触控显示屏中的栅线与连接线的走线的示意图；
图6为根据本发明实施例的一种内嵌式触控显示屏的结构示意图；
图7为根据本发明实施例的一种内嵌式触控显示屏的显示/触控功 能切换部件的结构示意图；
图8为根据本发明实施例的一种内嵌式触控显示屏的驱动方法的流程图；以及
图9为用于根据本发明实施例的一种内嵌式触控显示屏的触控驱动信号和公共电极信号的波形示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述。
图2为根据本发明实施例的一种内嵌式触控显示屏的结构示意图。该内嵌式触控显示屏可以基于平面内开关(IPS，In-Plane Switch)技术或高级超维场开关(ADS，Advanced Super Dimension Switch)技术，其中公共电极被设置在阵列基板上。更具体地，该触控显示屏可以包括阵列基板和彩膜基板(未示出)。阵列基板包括相互绝缘交叉的数据线21和栅线22、多条连接线25以及多个公共电极区域23。每个公共电极区域23包括矩阵排列的多个公共电极块24，且每个公共电极区域23中的多个公共电极块24通过一个相应的连接线25相连。
当显示屏处于显示阶段时，每个公共电极区域23通过一个相应的连接线25被供应一个公共电极信号，并且数据线21被供应相应的数据信号。当显示屏处于触控阶段时，每个公共电极区域23中的公开电极块24用作触控驱动电极，并通过一个相应的连接线25被供应一个触控驱动信号，并且数据线21中的至少一部分用作触控感测信号线用于传送所生成的触控感测信号。
在本实施例中，公共电极以亚像素单元为单位被划分成块，每个公共电极块可以与一个相应的亚像素单元的像素电极相对应。在本文中所谓亚像素单元是相互绝缘交叉的数据线和栅线围成的区域，每一亚像素单元包括一薄膜晶体管(TFT)，该TFT的栅极接栅线，源极接数据线，漏极接像素电极。由于公共电极被划分成块，所以每条数据线的负载(loading)较小，使得该内嵌式触控显示屏可以适合于大尺寸面板的应用；然而，本发明的实施例不限于大尺寸面板的应用。
图3和4示出了两种类型的示例性公共电极区域的俯视示意图。在图3所示的示例中，每个公共电极区域23包括矩阵排列的一行公共 电极块24。在图4所示的示例中，每个公共电极区域23包括矩阵排列的3行公共电极块24。当然，每个公共电极区域23可以包括更多或更少行的公共电极块24。特别地，每一公共电极块24与数据线21和栅线22在阵列基板上的投影可以均不重叠。这有助于减少公共电极块24与数据线21之间的寄生电容和公共电极块24与栅线22之间的寄生电容。由于公共电极块24被复用为触控驱动电极，并且数据线21(的至少一部分)被复用为触控感测信号线，所以这也减少了触控驱动电极与触控感测信号线之间的寄生电容以及因此的触控驱动电极传递触控驱动信号时产生的时延，提高了触控检测的准确性。一般地，数据线不会影响显示屏的开口率，所以将数据线复用为触控感测信号线也不会影响触摸屏的开口率。另外，由于公共电极块24被设置为与像素电极一一对应，所以无需增加额外的掩模板并且因此降低生产成本。
作为示例而非限制，公共电极块24可以与栅线22同层设置。可替换地，公共电极块24可以与数据线21同层设置。而且，连接线25可以与公共电极块24同层设置；或者，连接线25可以位于公共电极块24的上方或下方。公共电极块24与连接线25之间不用设置绝缘层，二者可以直接相连接。特别地，连接线25与公共电极块24不同层设置时，每行公共电极块24可以通过过孔和连接线25进行连接。连接线25也可以与栅线22同层且绝缘设置，在该情况下，连接线25可以具有与栅线22相同的金属材料，诸如铝、铜等。
图5为根据本发明实施例的一种内嵌式触控显示屏中的栅线与连接线的走线的示意图。当连接线25和栅线22设置在同一层时，它们可能会相互接触。如图5所示，第一个连接线25与第二个栅线22之间存在交叉区域T。为了避免连接线25与栅线22的接触，栅线22或者连接线25可以在T区域处通过TFT的源漏金属层以跳线的方式进行连接。具体地，可以使栅线22在T区域处通过TFT的源漏金属层跳线，或者可以使连接线25在T区域处通过TFT的源漏金属层跳线。
图6为根据本发明实施例的一种内嵌式触控显示屏的结构示意图。该触控显示屏还包括用于供应触控驱动信号的多个触控驱动信号通道26和用于获取所生成的触控感测信号的多个触控感测信号通道27。一个触控驱动信号通道26可以连接一个或多个(相邻的)连接线25，并且一个触控感测信号通道27可以连接一个或多个(相邻的)数据线21。 在图6所示的示例中，第一行和第二行连接线25连接一个触控驱动信号通道26，并且第三列和第四列的数据线21连接一个触控感测信号通道27。
可以根据所需的触控精度确定触控驱动信号通道26的个数和每个触控驱动信号通道26所连接的连接线25的个数。在一个示例中，一个触控驱动信号通道26可以连接相邻的多个连接线25，使得连接该触控驱动信号通道26的第一个连接线到最后一个连接线之间的距离为5mm-7mm。一般地，设m代表连接一个触控驱动信号通道的第一个连接线到最后一个连接线之间的距离，n代表相邻两个连接线之间的距离，并且x代表需要一个触控驱动信号通道所连接的连接线的个数，则x＝m/n。
类似地，可以根据所需的触控精度确定触控感测信号通道27的个数和每个触控感测信号通道27所连接的数据线21的个数。具体地，设a代表触控显示屏的宽度，b代表相邻两个触控感测信号通道27之间的距离，并且c代表需要的触控感测信号通道27的个数，则c＝a/b。进一步地，每个触控感测信号通道27所连接的数据线21的个数可以根据相邻两列数据线21之间的距离以及连接该触控感测信号通道27的第一列数据线到最后一列数据线之间的距离确定。具体地，设d代表相邻两列数据线之间的距离，e代表连接一个触控感测信号通道27的第一列数据线到最后一列数据线之间的距离，并且f代表连接一个触控感测信号通道27的数据线21的个数，则f＝e/d。
图7为根据本发明实施例的一种内嵌式触控显示屏的显示/触控功能切换部件的结构示意图。继续图6所示的示例，其中将第三列数据线和第四列数据线复用为触控感测信号线。如图7所示，所述显示/触控功能切换部件可以为开关元件81。开关元件81取决于显示屏处于显示阶段还是触控阶段而选择性地动作，使得数据线21中用作触控感测信号线的所述至少一部分在显示阶段被供应数据信号并且在触控阶段传送所生成的触控感测信号。具体地，当触控显示屏处于显示阶段时，开关元件81被驱动电路控制成向相应的数据线21供应数据信号，而当触控显示屏处于触控阶段时，开关元件81被驱动电路控制成将相应的数据线21连接到触控感测信号通道以传送所生成的触控感测信号。
根据本发明的另一方面，还提供了一种显示装置，包括如前面描 述的内嵌式触控显示屏。在前面描述了内嵌式触控显示屏的细节，其在此不进行详细讨论。
图8为根据本发明实施例的一种内嵌式触控显示屏的驱动方法的流程图。如图8所示，该方法包括：
S801、当触控显示屏处于显示阶段时，供应公共电极信号给连接线，并且供应数据信号给数据线；以及
S802、当触控显示屏处于触控阶段时，供应触控驱动信号给连接线，并且通过数据线中用作触控感测信号线的所述至少一部分传送所生成的触控感测信号。
图9为用于根据本发明实施例的一种内嵌式触控显示屏的触控驱动信号和公共电极信号的波形示意图。如图9所示，当触控显示屏处于显示阶段时，触控驱动信号通道接收驱动电路提供的公共电极信号(Vcom)，用以向连接触控驱动信号通道的公共电极块供应显示电压；当触控显示屏处于触控阶段时，触控驱动信号通道接收驱动电路提供的触控驱动信号(其在图中被示出为方波信号)，用以向连接触控驱动信号通道的公共电极块供应触控驱动信号。
如所示的，用于触控显示屏的每一帧的周期(V-sync)被分成显示阶段和触控阶段。例如，如果触控显示屏的显示一帧的时间为16.7ms，则可以选取5ms作为触控阶段，其他的11.7ms作为显示阶段。其他替换方案也是可能的。
虽然在附图和和前面的描述中已经详细地说明和描述了本发明，但是这样的说明和描述应当被认为是说明性的和示意性的，而非限制性的；本发明不限于所公开的实施例。
显然，本领域的技术人员可以对本发明的实施例进行各种修改和变型而不脱离本发明的精神和范围。这样，倘若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修改和变型在内。

Claims (15)

  1. 一种内嵌式触控显示屏，包括：
    彩膜基板；以及
    阵列基板，包括相互绝缘交叉的数据线和栅线、多个连接线以及多个公共电极区域，所述多个公共电极区域中的每一个包括矩阵排列的多个公共电极块，每个公共电极区域中的多个公共电极块由所述多个连接线中的相应一个相互连接；
    其中，当所述触控显示屏处于显示阶段时，每个公共电极区域通过所述相应的一个连接线被供应一个公共电极信号，并且所述数据线被供应相应的数据信号，并且
    其中，当所述触控显示屏处于触控阶段时，每个公共电极区域中的多个公共电极块用作触控驱动电极，并通过所述相应的一个连接线被供应一个触控驱动信号，并且所述数据线中的至少一部分用作触控感测信号线用于传送所生成的触控感测信号。
  2. 根据权利要求1所述的触控显示屏，其中，所述多个公共电极区域中的每一个包括矩阵排列的一行或多行公共电极块。
  3. 根据权利要求1所述的触控显示屏，其中，所述阵列基板还包括多个亚像素单元，该多个亚像素单元中的每一个包括像素电极，并且其中，所述公共电极块中的每一个与一个相应的像素电极对应。
  4. 根据权利要求1所述的触控显示屏，其中，所述公共电极中的每一个与所述数据线和栅线在所述阵列基板上的投影均不重叠。
  5. 根据权利要求1所述的触控显示屏，其中，所述公共电极块与所述栅线或者数据线同层设置。
  6. 根据权利要求1所述的触控显示屏，其中，所述连接线与所述公共电极块同层设置；或者，所述连接线位于所述公共电极块的上方；或者，所述连接线位于所述公共电极块的下方。
  7. 根据权利要求5或6所述的触控显示屏，其中，所述连接线与所述栅线同层且绝缘设置。
  8. 根据权利要求1所述的触控显示屏，其中，所述连接线为金属材料。
  9. 根据权利要求1所述的触控显示屏，还包括用于向所述多个连 接线供应触控驱动信号的多个触控驱动信号通道，每个触控驱动信号通道连接至少一个连接线。
  10. 根据权利要求9所述的触控显示屏，还包括用于从所述数据线中用作触控感测信号线的所述至少一部分获取所生成的触控感测信号的多个触控感测信号通道，每个触控感测信号通道连接至少一个数据线。
  11. 根据权利要求10所述的触控显示屏，其中，所述多个触控驱动信号通道和多个触控感测信号通道的个数根据所需的触控精度确定。
  12. 根据权利要求1所述的触控显示屏，还包括多个开关元件，其用于取决于所述触控显示屏处于显示阶段还是触控阶段而选择性地动作，使得所述数据线中用作触控感测信号线的所述至少一部分在显示阶段被供应数据信号并且在触控阶段传送所生成的触控感测信号。
  13. 根据权利要求12所述的触控显示屏，其中，所述多个开关元件中的每一个为模拟开关。
  14. 一种用于驱动权利要求1-13任一项所述的内嵌式触控显示屏的方法，包括：
    当所述触控显示屏处于显示阶段时，供应公共电极信号给所述连接线，并且供应数据信号给所述数据线；以及
    当所述触控显示屏处于触控阶段时，供应触控驱动信号给所述连接线，并且通过所述数据线中用作触控感测信号线的所述至少一部分传送所生成的触控感测信号。
  15. 一种显示装置，包括权利要求1-13任一项所述的内嵌式触控显示屏。
PCT/CN2015/092286 2015-06-29 2015-10-20 一种内嵌式触控显示屏及其驱动方法、显示装置 WO2017000432A1 (zh)

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