WO2016106840A1 - 单层电容式触摸屏以及触摸显示装置 - Google Patents

单层电容式触摸屏以及触摸显示装置 Download PDF

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WO2016106840A1
WO2016106840A1 PCT/CN2015/070602 CN2015070602W WO2016106840A1 WO 2016106840 A1 WO2016106840 A1 WO 2016106840A1 CN 2015070602 W CN2015070602 W CN 2015070602W WO 2016106840 A1 WO2016106840 A1 WO 2016106840A1
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electrodes
electrode
touch screen
sub
capacitive touch
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PCT/CN2015/070602
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English (en)
French (fr)
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秦杰辉
周锦杰
谭小平
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深圳市华星光电技术有限公司
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Priority to US14/425,041 priority Critical patent/US20160342260A1/en
Publication of WO2016106840A1 publication Critical patent/WO2016106840A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—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; 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
    • G06F3/0448—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
    • 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
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • 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
    • 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
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • 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
    • G06F2203/04111—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

Definitions

  • the present invention relates to the field of touch technologies, and in particular, to a single-layer capacitive touch screen and a touch display device including the touch screen.
  • touch screen As an input medium, the touch screen is the simplest and most convenient way of human-computer interaction, so the touch screen is increasingly applied to various electronic products. Based on different working principles and media for transmitting information, touch screen products can be divided into four types: infrared touch screen, capacitive touch screen, resistive touch screen and surface acoustic wave touch screen; among them, capacitive touch screen has long life, high light transmittance and can support many Point touch and other advantages have become the mainstream touch screen technology.
  • Capacitive touch screens include surface capacitive and projected capacitive, and the projected capacitive type can be divided into self-capacitance and mutual capacitance.
  • the self-capacitance type is made of indium tin oxide (ITO, a transparent conductive material) on the surface of the glass to form an array of sensing electrodes and scanning electrodes. These sensing electrodes and scanning electrodes respectively form a capacitance with the ground. This capacitance is usually The self-capacitance is the capacitance of the electrode to the ground.
  • the self-capacitance screen sequentially detects the sensing electrode and the scanning electrode array, and determines the coordinates of the sensing electrode and the scanning electrode array according to the change of the capacitance before and after the touch, and then combines them into a planar touch coordinate.
  • the self-capacitance scanning method is equivalent to projecting the touch points on the touch screen to the X-axis and Y-axis directions respectively, and then calculating the coordinates in the X-axis and Y-axis directions, respectively, and finally combining the coordinates of the touch points.
  • the principle of the mutual capacitance touch screen is shown in Figure 1.
  • the mutual capacitance screen is also used to make the sensing electrode Rx and the scanning electrode Tx on the glass surface.
  • the difference between the self-capacitance screen and the self-capacitance screen is that the coupling capacitance C will be formed where the two sets of electrodes intersect. M , that is, the two sets of electrodes respectively constitute the two poles of the coupling capacitor C M .
  • the sensing electrode emits an excitation signal, and all the scanning electrodes receive the signal, so that the capacitance value of all the intersections of the sensing electrode and the scanning electrode, that is, the capacitance of the two-dimensional plane of the entire touch screen can be obtained.
  • the coordinates of each touch point can be calculated. Therefore, even if there are multiple touch points on the screen, the true coordinates of each touch point can be calculated.
  • One of the existing mutual-capacitive touch screens is that the sensing electrode Rx and the scanning electrode Tx are respectively made of two layers of ITO conductive material, and are disposed on two parallel surfaces that are not coplanar, which is called a double-layer ITO mutual-capacitive touch screen.
  • a double-layer ITO mutual-capacitive touch screen that is, Doubie Layer ITO touch screen, referred to as DITO
  • the touch screen production process is complex, the production yield is restricted by the production process; and the other is a single layer ITO mutual capacitance type in which the sensing electrode Rx and the scanning electrode Tx are disposed on the same plane.
  • the touch screen that is, the Single Layer ITO touch screen, referred to as SITO
  • SITO the Single Layer ITO touch screen
  • the sensing electrode Rx and the scanning electrode Tx array are arranged perpendicular to each other, and the sensing electrode Rx and the scanning electrode Tx are bridged at each other.
  • the sensing electrode Rx and the scanning electrode Tx are prevented from contacting each other.
  • the single-layer mutual capacitive touch screen of the structure has a small coupling area of the sensing electrode Rx and the scanning electrode Tx, and the mutual capacitance formed is small, and the mutual capacitance changes when touched. Small, resulting in a small signal to noise ratio of the touch screen.
  • the present invention provides a single-layer capacitive touch screen in which the coupling area of the two electrodes is large, the mutual capacitance formed is increased, and the signal-to-noise ratio of the touch screen can be improved.
  • a single-layer capacitive touch screen comprising a plurality of first electrodes and a plurality of second electrodes disposed in a same structural layer, the plurality of first electrodes being arranged in a first direction; and being orthogonal to the first direction In the two directions, a plurality of second electrodes are disposed corresponding to each of the first electrodes, wherein the first electrode includes an electrode body and a plurality of electrode supports connected to the electrode body, and the second electrode is disposed There is a groove corresponding to the shape of the electrode support, each electrode support is embedded in a groove of a second electrode, and each electrode support and the corresponding second electrode form a mutual capacitance unit.
  • the electrode support includes a plurality of juxtaposed sub-electrodes and a connection electrode, one end of the connection electrode is connected to the electrode body, and the other end is sequentially connected to the plurality of juxtaposed sub-electrodes.
  • the sub-electrode has an axisymmetric shape with the connecting electrode as an axis of symmetry.
  • the sub-electrodes are elongated structures, and the plurality of sub-electrodes are parallel to each other.
  • the number of the sub-electrodes is two, and the electrode sub-electrodes and the electrode support formed by the connection electrodes have a shape of a "soil" shape.
  • the sub-electrode has a prismatic structure.
  • the number of the sub-electrodes is two.
  • the single-layer capacitive touch screen further includes a flexible circuit board, each of the first electrodes is connected to the flexible circuit board through a first connecting wire, and each of the second electrodes is connected to the flexible through a second connecting wire a circuit board; wherein a plurality of first electrodes are arranged in a first direction to form a plurality of column electrodes; a plurality of second electrodes located in the same horizontal direction along the first direction, through the second connecting wires in the flexible circuit The plates are connected together to form a row of electrodes, thereby forming a plurality of row electrodes arranged in the second direction.
  • the materials of the first electrode, the second electrode, the first connecting wire and the second connecting wire are all indium tin oxide.
  • Another aspect of the present invention is to provide a touch display device including a liquid crystal panel and a touch screen located on the liquid crystal panel, wherein the touch screen is a single layer capacitive touch screen as described above.
  • the electrode support of the first electrode is embedded in the recess of the second electrode, so that the electrode support of the first electrode is surrounded by the second electrode.
  • the capacity of the electrode holder and the corresponding second electrode to form a mutual capacitance unit is increased, and the signal-to-noise ratio (SNR) of the touch screen touch signal is improved.
  • 1 is a schematic diagram of the principle of a mutual capacitive touch screen.
  • FIG. 2 is a schematic structural diagram of a touch display device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a single-layer capacitive touch screen according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a mutual capacitance unit according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a mutual capacitance unit according to another embodiment of the present invention.
  • the single-layer capacitive touch screen includes a plurality of first electrodes and a plurality of second electrodes disposed in the same structural layer, the plurality of first electrodes being arranged in a first direction; in a second direction orthogonal to the first direction And a plurality of second electrodes are disposed corresponding to each of the first electrodes, wherein the first electrode includes an electrode body and a plurality of electrode supports connected to the electrode body, and the second electrode is provided with The shape of the electrode support corresponds to a groove, and each electrode support is embedded in a second In the groove of the electrode, each electrode support and the corresponding second electrode form a mutual capacitance unit.
  • the electrode holder of the first electrode By embedding the electrode holder of the first electrode into the recess of the second electrode, the electrode holder of the first electrode is surrounded by the second electrode, increasing the capacity of the electrode holder and the corresponding second electrode to form a mutual capacitance unit Improves the signal-to-noise ratio of the touch screen touch signal.
  • the touch display device provided in this embodiment includes a liquid crystal panel 2 and a touch screen 1 located on the liquid crystal panel 2 , wherein the touch screen 1 is a single-layer capacitive touch screen.
  • the screen displayed by the touch display device can be controlled by a single layer capacitive touch screen touch operation.
  • the single-layer capacitive touch screen includes a plurality of first electrodes 10 and a plurality of second electrodes 20 disposed in the same structural layer, and the plurality of first electrodes 10 are along the first direction (eg, Arranged in the X direction in FIG. 3; in the second direction orthogonal to the first direction (in the Y direction in FIG. 3), a plurality of second electrodes 20 are disposed corresponding to each of the first electrodes 10.
  • three first electrodes 10 are arranged in the X direction
  • three second electrodes 20 are arranged in the Y direction corresponding to each of the first electrodes 10.
  • the single-layer capacitive touch screen further includes a flexible circuit board 40.
  • Each of the first electrodes 10 is connected to the flexible circuit board 40 through a first connecting wire 50, and each of the second electrodes 20 is connected to the second connecting wire 60 through a second connecting wire 60.
  • the flexible circuit board 40 Further, in the entire single-layer capacitive touch screen, the plurality of first electrodes 10 are arranged in a first direction (such as the X direction in FIG. 3) to form a plurality of column electrodes; and the plurality are located in the same horizontal direction (as shown in FIG. 3).
  • the second electrodes 20 are connected together on the flexible circuit board 40 through the second connecting wires 60 to form a row of electrodes, thereby forming a plurality of rows arranged in the second direction (in the Y direction in FIG. 3). Row electrode.
  • the materials of the first electrode 10, the second electrode 20, the first connecting wire 50 and the second connecting wire 60 are all indium tin oxide (ITO).
  • the first electrode 10 includes an electrode body 12 and three electrode holders 11 connected to the electrode body 12, and the second electrode 20 is provided with a groove 21 corresponding to the shape of the electrode holder 11.
  • Each of the electrode holders 11 is embedded in a recess 21 of the second electrode 20, and each of the electrode holders 11 and the corresponding second electrode 20 constitutes a mutual capacitance unit 30.
  • an array of mutual capacitance units 30 is formed in a single layer capacitive touch screen.
  • the electrode holder 11 may include a plurality of juxtaposed sub-electrodes 112 and a connection electrode 111.
  • One end of the connection electrode 111 is connected to the electrode main body 12, and the other end is sequentially connected to a plurality of juxtaposed sub-electrodes 112.
  • each sub-electrode 112 has an axis of symmetry with the connecting electrode 111. Axisymmetric shape.
  • the sub-electrodes 112 are elongated structures, the number of which is two, and the two sub-electrodes 112 are parallel to each other, and the electrode electrodes of the two sub-electrodes 112 and the connection electrode 111 are formed.
  • the body 11 has a shape structure of a "soil" shape.
  • the sub-electrode 112 may also have other regular shapes or irregular shapes, and is preferable when the sub-electrode 112 has an axisymmetric shape with the connection electrode 111 as an axis of symmetry.
  • the sub-electrodes 112 have a prismatic structure, and the number thereof is also two.
  • the electrode holders 11 composed of the two sub-electrodes 112 and the connection electrodes 111 have a zigzag-shaped structure.
  • the second electrode 20 is provided with a groove 21 corresponding to the shape of the zigzag electrode support 11, the zigzag electrode support 11 is embedded in the groove 21, and the electrode support 11 and the second electrode 20 form a mutual Capacitor unit 30.
  • the electrode support of the first electrode is embedded in the recess of the second electrode, so that the electrode support of the first electrode is surrounded by the second electrode, thereby increasing
  • the electrode holder and the corresponding second electrode constitute a capacity of the mutual capacitance unit, which improves the signal-to-noise ratio (SNR) of the touch screen touch signal.
  • SNR signal-to-noise ratio

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Abstract

一种单层电容式触摸屏和包含该触摸屏的触摸显示装置。电容式触摸屏包括布设在同一结构层内的多个第一电极（10）和第二电极（20），多个第一电极（10）沿第一方向排列；与第一方向正交的第二方向上对应于每一第一电极（10）布设有若干个第二电极（20），第一电极（10）包括电极主体（12）和若干个连接于电极主体（12）的电极支体（11），第二电极（20）中设置有与电极支体（11）的形状对应的凹槽（21），每一电极支体（11）嵌入一第二电极（20）的凹槽（21）中，每一电极支体（11）与对应的第二电极（20）构成互电容单元（30）。

Description

单层电容式触摸屏以及触摸显示装置 技术领域
本发明涉及触控技术领域,尤其涉及一种单层电容式触摸屏以及包含该触摸屏的触摸显示装置。
背景技术
触摸显示屏作为一种输入媒介,是目前最简单、方便的一种人机交互方式，因此触摸显示屏越来越多地应用到各种电子产品中。基于不同的工作原理以及传输信息的介质，触摸屏产品可以分为四种：红外线触摸屏、电容式触摸屏、电阻触摸屏和表面声波触摸屏；其中电容式触摸屏由于具有寿命长、透光率高、可以支持多点触控等优点成为目前主流的触摸屏技术。
电容式触摸屏包括表面电容式和投射电容式，其中投射电容式又可以分为自电容式和互电容式。自电容式是在玻璃表面用氧化铟锡(Indium tin oxide,ITO,一种透明的导电材料)制作成感应电极与扫描电极阵列，这些感应电极和扫描电极分别与地构成电容，这个电容就是通常所说的自电容，也就是电极对地的电容。当手指触摸到电容屏时，手指的电容将会叠加到屏体电容上，使屏体电容量增加。在触摸检测时，自电容屏依次分别检测感应电极与扫描电极阵列，根据触摸前后电容的变化，分别确定感应电极与扫描电极阵列的坐标，然后组合成平面的触摸坐标。自电容的扫描方式，相当于把触摸屏上的触摸点分别投影到X轴和Y轴方向，然后分别在X轴和Y轴方向计算出坐标，最后组合成触摸点的坐标。互电容式触摸屏的原理如图1所示，互电容屏也是在玻璃表面用制作感应电极Rx与扫描电极Tx，它与自电容屏的区别在于，两组电极交叉的地方将会形成耦合电容CM，即这两组电极分别构成了耦合电容CM的两极。当手指触摸到电容屏时，影响了触摸点附近两个电极之间的耦合，从而改变了这两个电极之间的耦合电容CM的大小。检测互电容大小时，感应电极发出激励信号，所有扫描电极接收信号，这样可以得到所有感应电极与扫描电极交汇点的电容值大小，即整个触摸屏的二维平面的电容大小。根据触摸屏二维电容变 化量数据，可以计算出每一个触摸点的坐标，因此，屏上即使有多个触摸点，也能计算出每个触摸点的真实坐标。
现有的互容式触摸屏中，一种是将感应电极Rx和扫描电极Tx分别用两层ITO导电材料层制作，设置在不共面的两平行面上，称为双层ITO互容式触摸屏，即Doubie Layer ITO触摸屏，简称DITO，这种触摸屏生产工艺复杂，生产良率受到生产工艺的制约；还有一种是将感应电极Rx和扫描电极Tx设置在同一平面上的单层ITO互容式触摸屏，即Single Layer ITO触摸屏，简称SITO，现有技术中的SITO，一般是感应电极Rx和扫描电极Tx阵列呈相互垂直的排列，在感应电极Rx和扫描电极Tx相互交汇点采用桥接的方式，避免感应电极Rx和扫描电极Tx相互接触，这种结构的单层互容式触摸屏，感应电极Rx和扫描电极Tx耦合面积小，所形成的互电容小，在触摸时互电容的变化量也较小，导致触摸屏信噪比小。
发明内容
鉴于现有技术存在的不足，本发明提供了一种单层电容式触摸屏，该触摸屏中两种电极的耦合面积大，增加了所形成的互电容，可以提高触摸屏信噪比。
为了实现上述目的，本发明采用了如下的技术方案：
一种单层电容式触摸屏，包括布设在同一结构层内的多个第一电极和多个第二电极，所述多个第一电极沿第一方向排列；在与第一方向正交的第二方向上，对应于每一第一电极布设有若干个第二电极，其中，所述第一电极包括电极主体和若干个连接于所述电极主体的电极支体，所述第二电极中设置有与所述电极支体的形状对应的凹槽，每一电极支体嵌入一第二电极的凹槽中，每一电极支体与对应的第二电极构成一互电容单元。
其中，所述电极支体包括多个并列的子电极以及一连接电极，所述连接电极的一端连接于所述电极主体，另一端依次连接所述多个并列的子电极。
其中，所述子电极具有以所述连接电极为对称轴的轴对称形状。
其中，所述子电极为长条状结构，并且多个子电极相互平行。
其中，所述子电极的数量为2个，该2个子电极与所述连接电极构成的电极支体具有“土”字形的形状结构。
其中，所述子电极为棱形状结构。
其中，所述子电极的数量为2个。
其中，所述单层电容式触摸屏还包括柔性电路板，每一第一电极通过一第一连接导线连接于所述柔性电路板，每一第二电极通过一第二连接导线连接于所述柔性电路板；其中，多个第一电极沿第一方向排列，形成多个列电极；沿第一方向位于同一水平方向上的多个第二电极，通过所述第二连接导线在所述柔性电路板上连接在一起，构成一行电极，由此形成沿第二方向上排列的多个行电极。
其中，所述第一电极、第二电极、第一连接导线以及第二连接导线的材料均为氧化铟锡。
本发明的另一方面是提供一种触摸显示装置，包括液晶面板以及位于液晶面板上的触摸屏，其中，所述触摸屏为如上所述的单层电容式触摸屏。
相比于现有技术，本发明实施例提供的单层电容式触摸屏，第一电极的电极支体嵌入到第二电极的凹槽中，使得第一电极的电极支体被第二电极包围，增加了电极支体与对应的第二电极构成互电容单元的容量，提高了触摸屏触控信号的信噪比(SNR)。
附图说明
图1是互电容式触摸屏的原理的示意图。
图2是本发明实施例提供的触摸显示装置的结构示意图。
图3是本发明实施例提供的单层电容式触摸屏的结构示意图。
图4是本发明实施例提供的互电容单元的结构示意图。
图5是本发明另一实施例提供的互电容单元的结构示意图。
具体实施方式
如前所述，本发明的目的是提供一种能够提高触摸屏触控信号的信噪比(SNR)的单层电容式触摸屏。该单层电容式触摸屏包括布设在同一结构层内的多个第一电极和多个第二电极，所述多个第一电极沿第一方向排列；在与第一方向正交的第二方向上，对应于每一第一电极布设有若干个第二电极，其中，所述第一电极包括电极主体和若干个连接于所述电极主体的电极支体，所述第二电极中设置有与所述电极支体的形状对应的凹槽，每一电极支体嵌入一第二 电极的凹槽中，每一电极支体与对应的第二电极构成一互电容单元。
通过将第一电极的电极支体嵌入到第二电极的凹槽中，使得第一电极的电极支体被第二电极包围，增加了电极支体与对应的第二电极构成互电容单元的容量，提高了触摸屏触控信号的信噪比。
下面将对结合附图用实施例对本发明做进一步说明。
如图2所示，本实施例提供的触摸显示装置包括液晶面板2以及位于液晶面板2上的触摸屏1，其中，触摸屏1为一种单层电容式触摸屏。通过对单层电容式触摸屏触摸操作，可以控制该触摸显示装置显示的画面。
其中，参阅图3和图4，上述的单层电容式触摸屏包括布设在同一结构层内的多个第一电极10和多个第二电极20，多个第一电极10沿第一方向(如图3中的X方向)排列；在与第一方向正交的第二方向(如图3中的Y方向)上，对应于每一第一电极10布设有若干个第二电极20。如图3所示的本实施例中，在X方向上排列有3个第一电极10，在Y方向上，对应于每一第一电极10布设有3个第二电极20。该单层电容式触摸屏还包括柔性电路板40，每一第一电极10通过一第一连接导线50连接于所述柔性电路板40，每一第二电极20通过一第二连接导线60连接于所述柔性电路板40。进一步地，在整个单层电容式触摸屏中，多个第一电极10沿第一方向(如图3中的X方向)排列，形成多个列电极；多个位于同一水平方向(如图3中的X方向)上第二电极20通过第二连接导线60在柔性电路板40上连接在一起，构成一行电极，由此形成沿第二方向(如图3中的Y方向)上排列的多个行电极。
其中，第一电极10、第二电极20、第一连接导线50以及第二连接导线60的材料均为氧化铟锡(Indium tin oxide，ITO)。
其中，如图4所示的，第一电极10包括电极主体12和3个连接于电极主体12的电极支体11，第二电极20中设置有与电极支体11的形状对应的凹槽21，每一电极支体11嵌入一个第二电极20的凹槽21中，每一电极支体11与对应的第二电极20构成一个互电容单元30。由此，在单层电容式触摸屏中形成互电容单元30阵列。
进一步地，电极支体11可以包括多个并列的子电极112以及一连接电极111，连接电极111的一端连接于电极主体12，另一端依次连接多个并列的子电极112。在较为优选的方案中，每一子电极112具有以连接电极111为对称轴的 轴对称形状。
具体到本实施例中，如图4所示的，子电极112为长条状结构，其数量为2个，并且2个子电极112相互平行，该2个子电极112与连接电极111构成的电极支体11具有“土”字形的形状结构。
在另外的一些实施例中，子电极112还可以是其他的规则形状或不规则的形状，并且当子电极112具有以连接电极111为对称轴的轴对称形状时为较佳的方案。例如，如5所示的，子电极112为棱形状结构,其数量也为2个，该2个子电极112与连接电极111构成的电极支体11具有锯齿状的形状结构。第二电极20中设置有与该锯齿状的电极支体11的形状对应的凹槽21，锯齿状的电极支体11嵌入到凹槽21中，电极支体11与第二电极20构成一个互电容单元30。
综上所述，本发明实施例提供的单层电容式触摸屏，第一电极的电极支体嵌入到第二电极的凹槽中，使得第一电极的电极支体被第二电极包围，增加了电极支体与对应的第二电极构成互电容单元的容量，提高了触摸屏触控信号的信噪比(SNR)。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (18)

  1. 一种单层电容式触摸屏，包括布设在同一结构层内的多个第一电极和多个第二电极，所述多个第一电极沿第一方向排列；在与第一方向正交的第二方向上，对应于每一第一电极布设有若干个第二电极，其中，所述第一电极包括电极主体和若干个连接于所述电极主体的电极支体，所述第二电极中设置有与所述电极支体的形状对应的凹槽，每一电极支体嵌入一第二电极的凹槽中，每一电极支体与对应的第二电极构成一互电容单元。
  2. 根据权利要求1所述的单层电容式触摸屏，其中，所述电极支体包括多个并列的子电极以及一连接电极，所述连接电极的一端连接于所述电极主体，另一端依次连接所述多个并列的子电极。
  3. 根据权利要求2所述的单层电容式触摸屏，其中，所述子电极具有以所述连接电极为对称轴的轴对称形状。
  4. 根据权利要求3所述的单层电容式触摸屏，其中，所述子电极为长条状结构，并且多个子电极相互平行。
  5. 根据权利要求4所述的单层电容式触摸屏，其中，所述子电极的数量为2个，该2个子电极与所述连接电极构成的电极支体具有“土”字形的形状结构。
  6. 根据权利要求3所述的单层电容式触摸屏，其中，所述子电极为棱形状结构。
  7. 根据权利要求4所述的单层电容式触摸屏，其中，所述子电极的数量为2个。
  8. 根据权利要求1所述的单层电容式触摸屏，其中，所述单层电容式触摸屏还包括柔性电路板，每一第一电极通过一第一连接导线连接于所述柔性电路板，每一第二电极通过一第二连接导线连接于所述柔性电路板；其中，多个第一电极沿第一方向排列，形成多个列电极；沿第一方向位于同一水平方向上的多个第二电极，通过所述第二连接导线在所述柔性电路板上连接在一起，构成一行电极，由此形成沿第二方向上排列的多个行电极。
  9. 根据权利要求8所述的单层电容式触摸屏，其中，所述第一电极、第二电极、第一连接导线以及第二连接导线的材料均为氧化铟锡。
  10. 一种触摸显示装置，包括液晶面板以及位于液晶面板上的触摸屏，其中，所述触摸屏为单层电容式触摸屏，该单层电容式触摸屏包括布设在同一结构层内的多个第一电极和多个第二电极，所述多个第一电极沿第一方向排列；在与第一方向正交的第二方向上，对应于每一第一电极布设有若干个第二电极，其中，所述第一电极包括电极主体和若干个连接于所述电极主体的电极支体，所述第二电极中设置有与所述电极支体的形状对应的凹槽，每一电极支体嵌入一第二电极的凹槽中，每一电极支体与对应的第二电极构成一互电容单元。
  11. 根据权利要求10所述的触摸显示装置，其中，所述电极支体包括多个并列的子电极以及一连接电极，所述连接电极的一端连接于所述电极主体，另一端依次连接所述多个并列的子电极。
  12. 根据权利要求11所述的触摸显示装置，其中，所述子电极具有以所述连接电极为对称轴的轴对称形状。
  13. 根据权利要求12所述的触摸显示装置，其中，所述子电极为长条状结构，并且多个子电极相互平行。
  14. 根据权利要求13所述的触摸显示装置，其中，所述子电极的数量为2个，该2个子电极与所述连接电极构成的电极支体具有“土”字形的形状结构。
  15. 根据权利要求12所述的触摸显示装置，其中，所述子电极为棱形状结构。
  16. 根据权利要求15所述的触摸显示装置，其中，所述子电极的数量为2个。
  17. 根据权利要求10所述的触摸显示装置，其中，所述单层电容式触摸屏还包括柔性电路板，每一第一电极通过一第一连接导线连接于所述柔性电路板，每一第二电极通过一第二连接导线连接于所述柔性电路板；其中，多个第一电极沿第一方向排列，形成多个列电极；沿第一方向位于同一水平方向上的多个第二电极，通过所述第二连接导线在所述柔性电路板上连接在一起，构成一行电极，由此形成沿第二方向上排列的多个行电极。
  18. 根据权利要求17所述的触摸显示装置，其中，所述第一电极、第二电极、第一连接导线以及第二连接导线的材料均为氧化铟锡。
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