WO2014134873A1 - 电容式触控模组、电容式内嵌触摸屏及显示装置 - Google Patents

电容式触控模组、电容式内嵌触摸屏及显示装置 Download PDF

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Publication number
WO2014134873A1
WO2014134873A1 PCT/CN2013/075735 CN2013075735W WO2014134873A1 WO 2014134873 A1 WO2014134873 A1 WO 2014134873A1 CN 2013075735 W CN2013075735 W CN 2013075735W WO 2014134873 A1 WO2014134873 A1 WO 2014134873A1
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WIPO (PCT)
Prior art keywords
touch
electrodes
electrode
sensing
sub
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Ceased
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PCT/CN2013/075735
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English (en)
French (fr)
Inventor
徐宇博
胡明
王国磊
林炳仟
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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Priority to US14/347,837 priority Critical patent/US9495935B2/en
Publication of WO2014134873A1 publication Critical patent/WO2014134873A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G06F3/044—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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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 OR CALCULATING; 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
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • 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
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals

Definitions

  • Capacitive touch module capacitive in-cell touch screen and display device
  • the present disclosure relates to a capacitive touch module, a capacitive in-cell touch screen, and a display device. Background technique
  • the Touch Screen Panel With the rapid development of display technology, the Touch Screen Panel has gradually spread throughout people's lives.
  • the touch screen can be divided into an add-on touch panel, an on-cell touch panel, and an in-cell touch panel.
  • the external touch screen is produced by separately separating the touch screen from the liquid crystal display (LCD), and then bonding them together to form a liquid crystal display with touch function.
  • the external touch screen has higher production cost and light transmittance.
  • the in-cell touch panel embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module, and can greatly reduce the manufacturing cost of the touch screen, and is favored by the major panel manufacturers.
  • Transistor thin film field effect transistor directly adds touch scan lines and touch sensing lines on the array substrate, that is, two strip electrodes intersecting each other on the surface of the TFT array substrate are formed, and the two electrodes are respectively used as The touch driving line and the touch sensing line of the touch screen form a mutual capacitance at the intersection of the opposite faces of the two electrodes.
  • the working process is: when loading the touch driving signal to the electrode as the touch driving line, detecting the voltage signal that the touch sensing line is coupled through the mutual capacitance, in the process, when the human body touches the touch screen, the human body electric field will Acting on the mutual capacitance, the capacitance value of the mutual capacitance is changed, and then the voltage signal coupled by the touch sensing line is changed, and the position of the contact can be determined according to the change of the voltage signal.
  • the structural design of the capacitive in-cell touch panel requires a new film layer on the existing array substrate, which requires a new process to be added when the array substrate is fabricated, which increases the production cost and is not conducive to improving production efficiency. Therefore, when designing a capacitive in-cell touch panel, the common electrode layer in the liquid crystal display panel is considered to divide the common electrode layer connected to the entire surface to form mutually insulated touch sensing electrodes and touch driving electrodes. A mutual capacitance is formed between the control sensing electrode and the touch driving electrode.
  • the capacitive in-cell touch panel for multiplexing the common electrode layer described above generally adopts an ordinary square-shaped graphic design when dividing the common electrode layer, that is, as shown in FIG.
  • the Tx and the touch sensing electrode Rx are in a block shape, and the mutual capacitance generated between the touch sensing electrode Rx and the touch driving electrode Tx is small, so that the electric field of the human body has little influence on the mutual capacitance change, and is in contact with the human body.
  • the power supply signal coupled by the touch sensing electrode changes little, so that the sensing sensitivity of the touch screen is low.
  • the embodiment of the invention provides a capacitive touch module, a capacitive in-cell touch screen and a display device for improving the sensitivity of the capacitive touch screen during touch.
  • a capacitive in-cell touch panel includes an array substrate having a common electrode layer, wherein the common electrode layer has mutually insulated touch sensing electrodes and touch driving electrodes; each of the touch sensing electrodes
  • the touch sensing sub-electrode includes a plurality of touch driving sub-electrodes, and the opposite sides of the adjacent touch sensing sub-electrodes and the touch driving sub-electrodes are a polyline;
  • a touch scan signal is applied to the touch driving electrode, and the touch sensing electrode is configured to couple and output a voltage signal of the touch scan signal.
  • a capacitive touch module includes a touch sensing electrode having mutually insulated touch sensing electrodes and touch driving electrodes, each of the touch sensing electrodes including a plurality of touch sensing electrodes.
  • Each of the touch driving electrodes includes a plurality of touch driving sub-electrodes, and opposite sides of the adjacent touch sensing sub-electrodes and the touch driving sub-electrodes are all broken lines.
  • a display device includes a capacitive in-cell touch panel provided by the embodiment of the invention or a capacitive touch module provided by the embodiment of the invention.
  • FIG. 1 is a schematic structural view of a common electrode layer in a touch panel of the prior art
  • FIG. 2 is a schematic diagram of a touch electrode and a touch sensing electrode in a touch screen according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a touch electrode and a touch sensing electrode in a touch screen according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing a shape of a fold line having a convex structure on a side opposite to a touch sensing sub-electrode and a touch driving sub-electrode in the touch panel according to an embodiment of the invention.
  • a capacitive in-cell touch panel includes an array substrate having a common electrode layer, the common electrode layer having mutually insulated touch sensing electrodes and touch driving electrodes, wherein each of the touch sensing electrodes includes Each of the touch sensing sub-electrodes includes a plurality of touch driving sub-electrodes, and opposite sides of the adjacent touch sensing sub-electrodes and the touch driving sub-electrodes are fold lines;
  • the touch sensing electrode is configured to couple the voltage of the touch scan signal Signal and output.
  • the opposite sides of the adjacent touch sensing sub-electrodes and the touch driving sub-electrodes are all broken lines, which are opposite to the adjacent touch driving electrodes and the touch sensing electrodes in the prior art.
  • the relative area between the adjacent touch driving electrodes and the touch sensing electrodes can be increased, thereby increasing the mutual capacitance between the touch driving electrodes and the touch sensing electrodes per unit area, and further Improve the sensitivity of the touch screen when touched.
  • the touch screen provided by the embodiment of the present invention can be applied to various modes of the liquid crystal display panel, for example, an in-plane switch (IPS, In-Plane Switch) and an advanced super-dimensional field switch (ADS) that can realize a wide viewing angle.
  • the Advanced Super Dimension Switch (LCD) panel can also be applied to a conventional TN (Twisted Nematic) type liquid crystal display panel, which is not limited herein. Therefore, in the touch panel provided by the embodiment of the present invention, the array substrate having the common electrode layer, for example, in the TN mode, may specifically be a color filter substrate in the liquid crystal panel, or in the ADS mode, for example, in the liquid crystal panel.
  • the TFT (Thin Film Transistor) array substrate is not limited herein.
  • the common electrode layer connected to the entire surface is divided to form mutually insulated touch sensing electrodes and touch driving electrodes, and in specific implementation, each formed by the common electrode layer is formed.
  • the touch sensing electrodes generally extend along the column direction of the pixel unit in the liquid crystal panel, and the touch driving electrodes generally extend along the row direction of the pixel unit in the liquid crystal panel; or, the touch sensing electrodes formed by using the common electrode layer are generally along
  • the pixel driving unit extends in the row direction of the liquid crystal panel, and the touch driving electrodes generally extend along the column direction of the pixel unit in the liquid crystal panel.
  • the extending direction of the touch sensing electrode and the touch driving electrode may also be along other directions. There is no limit here.
  • each touch sensing electrode extends along the column direction of the pixel unit in the liquid crystal panel
  • each touch driving electrode extends along the row direction of the pixel unit in the liquid crystal panel as an example.
  • the accuracy of the touch screen is usually in the order of millimeters, and the density and width of the touch driving electrodes and the touch sensing electrodes can be selected according to the required touch precision to ensure the required touch precision.
  • the touch driving electrodes and the touch are generally used.
  • the width of the sensing electrode can be controlled at 5-7 mm.
  • the accuracy of the liquid crystal display is usually on the order of micrometers. Therefore, a touch driving electrode and a touch sensing electrode generally cover a pixel unit of a plurality of rows or columns of liquid crystal displays.
  • the common electrode layer is generally divided into the required touch driving electrodes and the touch sensing electrodes along the gap between the pixel units, so that the integrity of the common electrode layer in each pixel unit can be ensured.
  • the accuracy referred to in the embodiment of the present invention refers to the touch screen.
  • the touch driving electrodes and the touch sensing electrodes disposed in the common electrode layer may have a diamond electrode structure (as shown in FIG. 2) or a strip electrode structure (as shown in FIG. 3).
  • the touch sensing electrodes Rx shown in FIG. 2 and FIG. 3 are arranged along the vertical direction in the figure, and the touch driving electrodes Tx are arranged along the horizontal direction in the figure, because the touch sensing electrodes Rx and the touch driving are used.
  • the electrodes Tx are arranged in the same layer.
  • the touch driving electrodes can be divided into a plurality of touch driving sub-electrodes that are insulated from each other, that is, the touch driving electrodes can include a plurality of touch driving sub-electrodes, and each of the touch driving electrodes The electrodes are connected by a metal bridge.
  • the touch sensing electrodes can be divided into a plurality of touch sensing sub-electrodes insulated from each other, that is, the touch sensing electrodes can include a plurality of touch sensing sub-electrodes, and each touch The sensing sub-electrodes are connected by a metal bridge. For example, in the diamond structure shown in FIG.
  • a touch sensing electrode Rx is composed of six touch sensing sub-electrodes, that is, Rx a, Rx b, Rx c, Rx d, Rx e and Rx f in FIG. Rx.
  • two touch sensing sub-electrodes Rx a and Rx b form a touch sensing electrode Rx
  • two touch sensing sub-electrodes Rx a and Rx b are connected by a metal bridge 01. .
  • only the touch driving electrodes may be designed to be composed of a plurality of touch driving sub-electrodes connected by a bridge, or only the touch sensing electrodes may be designed as multiple contacts connected by a bridge.
  • the touch-sensing electrode and the touch-sensing electrode are designed to be composed of sub-electrodes connected by a bridge, which is not limited herein.
  • FIG. 2 is only a schematic diagram of dividing the common electrode layer into a touch driving electrode and a touch sensing electrode.
  • the opposite side between the touch driving electrode Tx and the touch sensing electrode Rx is not shown as a broken line.
  • FIG. 3 shows a case where the opposite side between the touch driving sub-electrode Tx and the touch sensing sub-electrode Rx is a stepped fold line, that is, the adjacent touch sensing sub-electrode and the touch driving sub-electrode are opposite each other.
  • the sides of the fold line have a stepped structure, and the two stepped structures have the same shape and match each other.
  • the opposite side between the touch driving sub-electrode Tx1 and the touch sensing sub-electrode Rx1 is a concave-convex fold line, that is, the adjacent touch sensing sub-electrode and the touch driving sub-electrode are opposite each other.
  • the sides of the fold line have a concave-convex structure, and the two concave-convex structures have the same shape and match each other.
  • the side fold line structure may be a combination of a concave-convex structure and a stepped structure.
  • the shape of the fold line may be designed according to actual needs, which is not limited herein.
  • the touch sensing electrode Rx and the touch driving electrode Tx are disposed.
  • the common electrode layer may have a common electrode Vcom at the gap between the touch sensing electrode Rx and the touch driving electrode Tx, and the common electrode Vcom and The touch sensing electrode Rx and the touch driving electrode Tx are insulated from each other, and the common electrode Vcom accesses the common electrode signal during operation, so that the pixel unit in the corresponding area of the common electrode Vcom can perform normal display work.
  • the opposite edge between the touch driving sub-electrode and the touch sensing sub-electrode is a fold line structure, as shown in FIG. 3, the adjacent common electrodes Vcoml, Vcom2, Vcom3, Vcom4 and the touch driving sub-electrode Tx are opposite.
  • the side edges are also broken lines, and the adjacent common electrodes Vcoml, Vcom2, Vcom3, Vcom4 and the opposite sides of the touch sensing sub-electrodes Rx a and Rx b are also broken lines.
  • the signal access modes of the touch sensing electrodes, the touch driving electrodes, and the common electrodes in the common electrode layer of the touch panel are described in detail below.
  • a touch signal input line electrically connected to the touch driving electrode, a sensing signal output line electrically connected to the touch sensing electrode, and a common electrode signal input line electrically connected to the common electrode may be separately disposed on the array substrate.
  • the touch signal input line, the sensing signal output line, and the common electrode signal input line generally correspond to the gap position between each pixel unit in the liquid crystal panel to avoid affecting the normal display of the pixel unit.
  • the touch driving electrode Tx can be The corresponding touch signal input line is electrically connected through a plurality of via holes; the touch sensing electrode Rx and the corresponding sensing signal output line are electrically connected through a plurality of via holes; the common electrode Vcom and the corresponding common electrode signal input line pass through One via is electrically connected. That is, it is equivalent to parallel connection of the ITO electrode and a plurality of metal resistors composed of signal lines, so that the resistance of the electrodes can be minimized, thereby improving the signal-to-noise ratio when the electrodes transmit signals.
  • the embodiment of the present invention further provides a capacitive touch module including a touch sensing layer having mutually insulated touch sensing electrodes and touch driving electrodes, each of the touch sensing electrodes including a plurality of The touch sensing sub-electrode includes a plurality of touch driving sub-electrodes, and opposite sides of the adjacent touch sensing sub-electrodes and the touch driving sub-electrodes are all broken lines.
  • the fold line structure of the opposite side of the adjacent touch sensing sub-electrode and the touch driving sub-electrode may be the same as the bump in FIG.
  • the structural folds are the same, and may be the same as the stepped folds in FIG. 3, and will not be described in detail herein.
  • an embodiment of the present invention further provides a display device, including the capacitive in-cell touch panel provided by the embodiment of the present invention, or the capacitive touch module provided by the embodiment of the present invention.
  • a display device including the capacitive in-cell touch panel provided by the embodiment of the present invention, or the capacitive touch module provided by the embodiment of the present invention.
  • a capacitive touch module, a capacitive in-cell touch panel and a display device are provided in the embodiments of the present invention, and the common electrode layers connected to the entire surface of the array substrate are divided to form mutually insulated touch sensing electrodes and touch drivers.
  • the electrodes drive the touch driving electrodes and the touch sensing electrodes in time to realize the touch function and the display function.
  • Each of the touch sensing electrodes includes a plurality of touch sensing sub-electrodes
  • each of the touch driving electrodes includes a plurality of touch driving sub-electrodes
  • adjacent touch sensing sub-electrodes and opposite sides of the touch driving sub-electrodes The edges are all fold lines, which can increase the relative area between the adjacent touch driving electrodes and the touch sensing electrodes, thereby increasing the mutual capacitance between the touch driving electrodes and the touch sensing electrodes per unit area, thereby improving the touch screen touch. Sensing sensitivity of timing.

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  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
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Abstract

本发明公开了一种电容式触控模组、电容式内嵌触摸屏及显示装置，将阵列基板中整面连接的公共电极层进行分割，形成相互绝缘的触控感应电极和触控驱动电极，对触控驱动电极和触控感应电极进行分时驱动，以实现触控功能和显示功能。并且，每个触控感应电极包括多个触控感应子电极，每个触控驱动电极包括多个触控驱动子电极，且相邻的触控感应子电极和触控驱动子电极相对的侧边均为折线，这样可以增加相邻触控驱动电极和触控感应电极之间的相对面积，从而增加单位面积内触控驱动电极和触控感应电极之间的互电容，进而提高触摸屏在触控时的感应灵敏度。

Description

电容式触控模组、 电容式内嵌触摸屏及显示装置 技术领域
本公开涉及一种电容式触控模组、 电容式内嵌触摸屏及显示装置。 背景技术
随着显示技术的飞速发展， 触摸屏（ Touch Screen Panel ) 已经逐渐遍及 人们的生活中。 目前，触摸屏按照组成结构可以分为：外挂式触摸屏（Add on Mode Touch Panel )、 覆盖表面式触摸屏 ( On Cell Touch Panel )、 以及内嵌式 触摸屏（ In Cell Touch Panel )。 其中， 外挂式触摸屏是将触摸屏与液晶显示 屏（Liquid Crystal Display, LCD )分开生产， 然后贴合到一起成为具有触摸 功能的液晶显示屏， 外挂式触摸屏存在制作成本较高、 光透过率较低、 模组 较厚等缺点。 而内嵌式触摸屏将触摸屏的触控电极内嵌在液晶显示屏内部， 可以减薄模组整体的厚度， 又可以大大降低触摸屏的制作成本， 受到各大面 板厂家青睐。
目前， 现有的电容式内嵌（ in cell )触摸屏是在现有的 TFT ( Thin Film
Transistor, 薄膜场效应晶体管）阵列基板上直接另外增加触控扫描线和触控 感应线实现的， 即在 TFT 阵列基板的表面制作两层相互异面相交的条状电 极， 这两层电极分别作为触摸屏的触控驱动线和触控感应线， 在两条电极的 异面相交处形成互电容。 其工作过程为： 在对作为触控驱动线的电极加载触 控驱动信号时，检测触控感应线通过互电容耦合出的电压信号，在此过程中， 有人体接触触摸屏时， 人体电场就会作用在互电容上， 使互电容的电容值发 生变化， 进而改变触控感应线耦合出的电压信号， 根据电压信号的变化， 就 可以确定触点位置。
上述电容式内嵌触摸屏的结构设计， 需要在现有的阵列基板上增加新的 膜层， 导致在制作阵列基板时需要增加新的工艺， 使生产成本增加， 不利于 提高生产效率。 因此， 在设计电容式内嵌触摸屏时， 会考虑利用液晶显示屏 中的公共电极层， 将整面连接的公共电极层进行分割， 形成相互绝缘的触控 感应电极和触控驱动电极， 在触控感应电极和触控驱动电极之间形成互电 容。 将触摸屏显示每一帧的时间分为显示时间段和触控时间段； 在显示时间 段， 对触控驱动电极和触控感应电极加载公共电极信号， 实现公共电极层的 作用； 在触控时间段， 对触控驱动电极加载触控扫描信号， 检测触控感应电 极通过互电容耦合出的电压信号， 在此过程中， 有人体接触触摸屏时， 人体 电场就会影响互电容的电容值， 进而改变触控感应电极耦合出的电压信号， 才艮据电压信号的变化， 就可以确定触点位置。
上述这种复用公共电极层的电容式内嵌触摸屏，在对公共电极层进行分 割时， 一般都采用普通的方块形图形设计， 即如图 1 所示， 触控驱动电极
Tx和触控感应电极 Rx为方块状的图形， 在触控感应电极 Rx和触控驱动电 极 Tx之间产生的互电容较小， 使得人体电场对于互电容变化的影响较小， 在人体接触触摸屏时， 触控感应电极耦合出的电源信号变化较小， 使得触摸 屏的感应灵敏度较低。 发明内容
本发明实施例提供了一种电容式触控模组、 电容式内嵌触摸屏及显示装 置， 用以提高电容式触摸屏在触控时的感应灵敏度。
本发明实施例提供的一种电容式内嵌触摸屏， 包括具有公共电极层的阵 列基板， 所述公共电极层具有相互绝缘的触控感应电极和触控驱动电极； 每个所述触控感应电极包括多个触控感应子电极，每个所述触控驱动电 极包括多个触控驱动子电极，且相邻的所述触控感应子电极和所述触控驱动 子电极相对的侧边均为折线； 其中，
在显示时间段，对所述触控驱动电极和所述触控感应电极施加公共电极 信号；
在触控时间段， 对所述触控驱动电极施加触控扫描信号， 所述触控感应 电极用于耦合所述触控扫描信号的电压信号并输出。
本发明实施例提供的一种电容式触控模组， 包括具有相互绝缘的触控感 应电极和触控驱动电极的触控电极层，每个所述触控感应电极包括多个触控 感应子电极， 每个所述触控驱动电极包括多个触控驱动子电极， 相邻的所述 触控感应子电极和所述触控驱动子电极相对的侧边均为折线。
本发明实施例提供的一种显示装置， 包括本发明实施例提供的电容式内 嵌触摸屏或本发明实施例提供的电容式触控模组。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为现有技术触摸屏中公共电极层的结构示意图；
图 2为本发明实施例提供的触摸屏中触控驱动电极和触控感应电极为菱 形电极结构的示意图；
图 3为本发明实施例提供的触摸屏中触控驱动电极和触控感应电极为条 状电极结构的示意图；
图 4为本发明实施例提供的触摸屏中触控感应子电极和触控驱动子电极 相对的侧边具有 凸状结构的折线形状的示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图， 对本发明实施例进行清楚、 完整地描述。 显然， 所描述的 实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描述的本发 明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获得的所有 其他实施例， 都属于本发明保护的范围。
下面结合附图， 对本发明实施例提供的电容式触控模组、 电容式内嵌触 摸屏及显示装置的具体实施方式进行详细地说明。
附图中各层薄膜厚度和形状不反映阵列基板的真实比例， 目的只是示意 说明本发明的实施例。
本发明实施例提供的一种电容式内嵌触摸屏， 包括具有公共电极层的阵 列基板，该公共电极层具有相互绝缘的触控感应电极和触控驱动电极；其中， 每个触控感应电极包括多个触控感应子电极，每个触控驱动电极包括多 个触控驱动子电极，且相邻的触控感应子电极和触控驱动子电极相对的侧边 均为折线；
在显示时间段， 对触控驱动电极和触控感应电极施加公共电极信号； 在触控时间段， 对触控驱动电极施加触控扫描信号， 触控感应电极用于 耦合触控扫描信号的电压信号并输出。 本发明实施例提供的上述触摸屏中，相邻的触控感应子电极和触控驱动 子电极相对的侧边均为折线，相对于现有技术中相邻触控驱动电极和触控感 应电极之间的相对侧边为直线的情况，可以增加相邻触控驱动电极和触控感 应电极之间的相对面积，从而增加单位面积内触控驱动电极和触控感应电极 之间的互电容， 进而提高触摸屏在触控时的感应灵敏度。
具体地，本发明实施例提供的上述触摸屏可以适用于各种模式的液晶显 示面板， 例如可以适用于实现宽视角的平面内开关（IPS, In-Plane Switch ) 和高级超维场开关（ ADS, Advanced Super Dimension Switch )型液晶显示 面板， 也可以适用于传统的扭曲向列 （TN, Twisted Nematic )型液晶显示面 板， 在此不做限定。 因此， 本发明实施例提供的触摸屏中， 具有公共电极层 的阵列基板， 例如在 TN模式下， 具体可以为液晶面板中的彩膜基板， 或者 例如在 ADS模式下，也具体可以为液晶面板中的 TFT ( Thin Film Transistor, 薄膜晶体管） 阵列基板， 在此不做限定。
具体地， 本发明实施例提供的上述电容式触摸屏中， 分割整面连接的公 共电极层， 形成相互绝缘的触控感应电极和触控驱动电极， 在具体实施时， 利用公共电极层形成的各触控感应电极一般沿着液晶面板中像素单元的列 方向延伸， 各触控驱动电极一般沿着液晶面板中像素单元的行方向延伸； 或 者， 利用公共电极层形成的各触控感应电极一般沿着液晶面板中像素单元的 行方向延伸， 各触控驱动电极一般沿着液晶面板中像素单元的列方向延伸； 当然， 触控感应电极和触控驱动电极的延伸方向也可以沿着其他方向， 在此 不做限定。
下面以各触控感应电极沿着液晶面板中像素单元的列方向延伸，各触控 驱动电极沿着液晶面板中像素单元的行方向延伸为例进行说明。
一般地， 触摸屏的精度通常在毫米级， 可以根据所需的触控精度选择触 控驱动电极和触控感应电极的密度和宽度以保证所需的触控精度，通常触控 驱动电极和触控感应电极的宽度可以控制在 5-7mm。而液晶显示的精度通常 在微米级， 因此， 一般一个触控驱动电极和一个触控感应电极会覆盖多行或 多列液晶显示的像素单元。 并且， 一般都是沿着像素单元之间的间隙将公共 电极层分割成所需的触控驱动电极和触控感应电极的， 这样可以保证在每个 像素单元中公共电极层的完整性。本发明实施例中所指的精度是指触摸屏的 一个触控单元或者显示屏的一个像素单元的尺寸。
具体地，在公共电极层中布置的触控驱动电极和触控感应电极可以具有 菱形电极结构（如图 2所示）或条状电极结构（如图 3所示）。 其中， 在图 2 和图 3中示出的触控感应电极 Rx沿着图中的垂直方向布线， 触控驱动电极 Tx沿着图中的水平方向布线， 由于触控感应电极 Rx和触控驱动电极 Tx在 同层布置， 因此， 可以将各条触控驱动电极分割成相互绝缘的多个触控驱动 子电极， 即触控驱动电极可以包括多个触控驱动子电极， 各触控驱动子电极 之间通过金属桥相连， 同样， 也可以将各条触控感应电极分割成相互绝缘的 多个触控感应子电极， 即触控感应电极可以包括多个触控感应子电极， 各触 控感应子电极之间通过金属桥相连。 例如， 如图 2所示的菱形结构中由 6个 触控感应子电极组成一条触控感应电极 Rx, 即图 2中 Rx a, Rx b, Rx c, Rx d, Rx e和 Rx f组成一个 Rx。 如图 3所示的条状结构中由 2个触控感应 子电极 Rx a和 Rx b组成一条触控感应电极 Rx, 2个触控感应子电极 Rx a 和 Rx b之间通过金属桥 01连接。 并且， 在设计公共电极层的图案时， 可以 仅将触控驱动电极设计为由搭桥连接的多个触控驱动子电极组成， 或， 仅将 触控感应电极设计为由搭桥连接的多个触控感应子电极组成，还可以将触控 驱动电极和触控感应电极设计成都是由搭桥连接的子电极组成的，在此不做 限定。
图 2仅是将公共电极层分割成触控驱动电极和触控感应电极的示意图， 在图中未示出触控驱动电极 Tx和触控感应电极 Rx之间相对侧边为折线的情 况。而图 3中示出了触控驱动子电极 Tx和触控感应子电极 Rx之间相对侧边 为阶梯状折线的情况， 即相邻的触控感应子电极和触控驱动子电极相对的为 折线的侧边均具有阶梯状结构， 两阶梯状结构形状一致且相互匹配。 图 4为 中示出了触控驱动子电极 Txl和触控感应子电极 Rxl之间相对侧边为凹凸状 折线的情况， 即相邻的触控感应子电极和触控驱动子电极相对的为折线的侧 边均具有凹凸状结构， 两凹凸状结构形状一致且相互匹配。 并且， 在具体实 施时，还可以存在侧边的折线结构为凹凸状结构和阶梯状结构的组合，当然， 也可以根据实际需要设计折线的形状， 在此不做限定。
进一步地， 如图 3所示， 由于触摸屏的精度通常在毫米级， 而液晶显示 的精度通常在微米级， 因此， 在设置触控感应电极 Rx和触控驱动电极 Tx 时， 两者之间会存在几列像素单元的间隙， 这样， 在公共电极层位于触控感 应电极 Rx和触控驱动电极 Tx之间的间隙处还可以具有公共电极 Vcom, 该 公共电极 Vcom与触控感应电极 Rx和触控驱动电极 Tx相互绝缘，公共电极 Vcom在工作时接入公共电极信号， 保证在公共电极 Vcom对应区域的像素 单元能够进行正常的显示工作。
并且， 由于触控驱动子电极和触控感应子电极之间相对的边缘为折线结 构， 那么如图 3 所示， 相邻的公共电极 Vcoml、 Vcom2、 Vcom3、 Vcom4 和触控驱动子电极 Tx相对的侧边也均为折线， 相邻的公共电极 Vcoml、 Vcom2、 Vcom3、 Vcom4和触控感应子电极 Rx a和 Rx b相对的侧边也均为 折线。
下面对上述触摸屏的公共电极层中的触控感应电极、触控驱动电极和公 共电极的信号接入方式进行详细的说明。
在具体实施时， 可以在阵列基板上单独布置与触控驱动电极电连接的触 控信号输入线， 与触控感应电极电连接的感应信号输出线， 与公共电极电连 接的公共电极信号输入线； 并且， 触控信号输入线、 感应信号输出线和公共 电极信号输入线一般与液晶面板中各像素单元之间的间隙位置相对应， 以避 免影响像素单元的正常显示。
进一步地， 由于公共电极层一般由透明电极材料如 ITO材料制成， 进一 步地为了最大限度的降低公共电极层的电阻，提高各电极传递电信号的信噪 比， 可以将触控驱动电极 Tx与对应的触控信号输入线通过多个过孔电性相 连； 触控感应电极 Rx与对应的感应信号输出线通过多个过孔电性相连； 公 共电极 Vcom与对应的公共电极信号输入线通过多个过孔电性相连。 即相当 于将 ITO电极和多个由信号线组成的金属电阻并联，这样能最大限度的减少 电极的电阻， 从而提高电极传递信号时的信噪比。
基于同一发明构思， 本发明实施例还提供了一种电容式触控模组， 包括 具有相互绝缘的触控感应电极和触控驱动电极的触控电极层，每个触控感应 电极包括多个触控感应子电极， 每个触控驱动电极包括多个触控驱动子电 极， 相邻的触控感应子电极和触控驱动子电极相对的侧边均为折线。
本发明实施例提供的上述电容式触控模组中，相邻的触控感应子电极和 触控驱动子电极相对的侧边的折线结构在具体实施时， 可以和图 4中的凹凸 结构状折边相同， 也可以和图 3中的阶梯状折边相同， 在此不作详述。 基于同一发明构思， 本发明实施例还提供了一种显示装置， 包括本发明 实施例提供的上述电容式内嵌触摸屏或包括本发明实施例提供的上述电容 式触控模组， 该显示装置的实施可以参见上述电容式内嵌触摸屏或电容式触 控模组的实施例， 重复之处不再赘述。
本发明实施例提供的一种电容式触控模组、 电容式内嵌触摸屏及显示装 置， 将阵列基板中整面连接的公共电极层进行分割， 形成相互绝缘的触控感 应电极和触控驱动电极， 对触控驱动电极和触控感应电极进行分时驱动， 以 实现触控功能和显示功能。 并且， 每个触控感应电极包括多个触控感应子电 极， 每个触控驱动电极包括多个触控驱动子电极， 且相邻的触控感应子电极 和触控驱动子电极相对的侧边均为折线， 这样可以增加相邻触控驱动电极和 触控感应电极之间的相对面积，从而增加单位面积内触控驱动电极和触控感 应电极之间的互电容， 进而提高触摸屏在触控时的感应灵敏度。 发明的精神和范围。 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、 一种电容式内嵌触摸屏， 包括具有公共电极层的阵列基板， 所述公 共电极层具有相互绝缘的触控感应电极和触控驱动电极； 每个所述触控感应 电极包括多个触控感应子电极，每个所述触控驱动电极包括多个触控驱动子 电极，且相邻的所述触控感应子电极和所述触控驱动子电极相对的侧边均为 折线； 其中，
在显示时间段，对所述触控驱动电极和所述触控感应电极施加公共电极 信号；
在触控时间段， 对所述触控驱动电极施加触控扫描信号， 所述触控感应 电极用于耦合所述触控扫描信号的电压信号并输出。
2、 如权利要求 1所述的触摸屏， 其中， 相邻的触控感应子电极和触控 且相互匹配。
3、 如权利要求 1或 2所述的触摸屏， 其中， 相邻的触控感应子电极和 一致且相互匹配。
4、 如权利要求 1-3 中任一项所述的触摸屏， 其中， 所述阵列基板为液 晶面板中的彩膜基板或薄膜晶体管 TFT阵列基板。
5、 如权利要求 1-4 中任一项所述的触摸屏， 其中， 所述触控感应电极 沿液晶面板中像素单元的列方向布线， 所述触控驱动电极沿液晶面板中像素 单元的行方向布线； 或，
所述触控感应电极沿液晶面板中像素单元的行方向布线， 所述触控驱动 电极沿液晶面板中像素单元的列方向布线。
6、 如权利要求 1-5 中任一项所述的触摸屏， 其中， 所述触控驱动电极 和所述触控感应电极具有条状电极结构或菱形电极结构。
7、 如权利要求 1-6 中任一项所述的触摸屏， 其中， 在所述公共电极层 位于所述触控感应电极和所述触控驱动电极之间的间隙处具有公共电极，所 述公共电极与所述触控感应电极和触控驱动电极相互绝缘；
相邻的公共电极和触控驱动子电极相对的侧边均为折线； 且 相邻的公共电极和触控感应子电极相对的侧边均为折线。
8、 如权利要求 7所述的触摸屏， 其中， 在触摸屏的阵列基板上具有与 所述触控驱动电极电连接的触控信号输入线， 与所述触控感应电极电连接的 感应信号输出线， 与所述公共电极电连接的公共电极信号输入线；
所述触控信号输入线、感应信号输出线和公共电极信号输入线与所述液 晶面板中各像素单元之间的间隙位置相对应。
9、 如权利要求 8所述的触摸屏， 其中， 所述触控驱动电极与所述触控 信号输入线通过多个过孔电性相连； 所述触控感应电极与所述感应信号输出 线通过多个过孔电性相连； 所述公共电极与所述公共电极信号输入线通过多 个过孔电性相连。
10、 一种电容式触控模组， 包括具有相互绝缘的触控感应电极和触控驱 动电极的触控电极层， 每个所述触控感应电极包括多个触控感应子电极， 每 个所述触控驱动电极包括多个触控驱动子电极， 其中相邻的所述触控感应子 电极和所述触控驱动子电极相对的侧边均为折线。
11、 一种显示装置， 包括如权利要求 1-9任一项所述的电容式内嵌触摸 屏或如权利要求 10所述的电容式触控模组。
PCT/CN2013/075735 2013-03-05 2013-05-16 电容式触控模组、电容式内嵌触摸屏及显示装置 Ceased WO2014134873A1 (zh)

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