WO2016086561A1 - 触控基板、触控面板及显示装置 - Google Patents

触控基板、触控面板及显示装置 Download PDF

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Publication number
WO2016086561A1
WO2016086561A1 PCT/CN2015/075872 CN2015075872W WO2016086561A1 WO 2016086561 A1 WO2016086561 A1 WO 2016086561A1 CN 2015075872 W CN2015075872 W CN 2015075872W WO 2016086561 A1 WO2016086561 A1 WO 2016086561A1
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Prior art keywords
touch
electrode
signal transmission
disposed
substrate
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PCT/CN2015/075872
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English (en)
French (fr)
Inventor
邹祥祥
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP15763475.9A priority Critical patent/EP3229111B1/en
Priority to US14/779,887 priority patent/US9933869B2/en
Publication of WO2016086561A1 publication Critical patent/WO2016086561A1/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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of touch technologies, and in particular, to a touch substrate, a touch panel, and a display device.
  • the touch screen is an external input device with more and more applications. It touches the touch panel to realize input through pointing objects (such as fingers, electronic pens, etc.), which makes human-computer interaction more direct, and has the characteristics of simplicity, quickness and humanity. .
  • pointing objects such as fingers, electronic pens, etc.
  • the touch panel includes a touch area (an area surrounded by a broken line frame) and a peripheral area, wherein strip touch electrodes are disposed in a cross section of the touch panel.
  • the strip-shaped touch electrodes disposed in the touch area are required to be electrically connected to the bonding terminals through signal transmission lines distributed in the peripheral area to be electrically connected to the touch driving chip (not shown) through the bonding terminals.
  • Signals for position detection are transmitted between the control electrodes and the touch driving chip.
  • An object of the present disclosure is to provide a touch substrate, a touch panel, and a display device to reduce the width of the frame of the touch panel.
  • an embodiment of the present disclosure provides a touch substrate having a peripheral area and a touch area, wherein the touch area has opposite first and second edges, and the touch substrate includes: Bonding terminals in the peripheral area, touch electrodes arranged in the touch area, and connections The signal transmission line of the bonding terminal and the touch electrode, the signal transmission line is located between the first edge and the second edge.
  • the bonding terminal includes: a first bonding terminal and a second bonding terminal between the first edge and the second edge;
  • the touch electrode includes: a first touch electrode and a second touch electrode;
  • the signal transmission line includes: a first signal transmission line connecting the first bonding terminal and the first touch electrode, and a second signal transmission line 1052 connecting the second bonding terminal and the second touch electrode;
  • the first touch electrode extends along the bonding terminal toward the display area, and the second touch electrode is disposed to intersect with the first touch electrode;
  • the first signal transmission line is disposed in the same layer as the first touch electrode
  • the second signal transmission line includes:
  • the first part is disposed in a different layer from the second touch electrode
  • the second portion connected to the first portion through the via is disposed in the touch area, disposed in the same layer as the second touch electrode, and forms an electrical connection.
  • the first portion is disposed in the same layer as the first touch electrode.
  • the touch substrate further includes:
  • first touch virtual electrode disposed between the first portion and the adjacent first touch electrode
  • the second touch virtual electrode is disposed between the second portion and the adjacent second touch electrode.
  • the first touch electrode, the second touch electrode, the first touch virtual electrode, and the second touch virtual electrode are formed by a metal grid
  • the touch substrate further includes at least one The roots are connected by a connecting line, and each of the conductive connecting lines corresponds to a metal mesh connecting a plurality of tip structures on the corresponding metal mesh.
  • the touch substrate further includes:
  • the first compensation line disposed in the touch area extends along an end of the corresponding first portion away from the bonding terminal to an edge of the display area, and the corresponding first part Electrically isolated.
  • the touch substrate further includes:
  • a second compensation line disposed in the touch area extends along an end of the corresponding second portion that is connected to the first portion to an edge of the display area, and a corresponding second portion Electrically isolated.
  • an embodiment of the present disclosure further provides a touch panel including the above touch substrate.
  • an embodiment of the present disclosure further provides a touch display device, including the above touch panel.
  • the touch signal substrate is disposed between the opposite edges by placing the signal transmission line between opposite edges of the touch area.
  • FIG. 1 is a schematic structural view of a touch panel of the prior art
  • FIG. 2 is a schematic view showing a comparison between a touch substrate and a touch substrate of the prior art according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural view of a touch substrate according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a touch substrate after adding a touch virtual electrode according to an embodiment of the present disclosure
  • FIG. 5a is a schematic structural diagram of a touch substrate after adding a compensation line according to an embodiment of the present disclosure
  • FIG. 5b is a schematic structural diagram of another touch substrate after adding a compensation line according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a metal grid-based touch electrode according to an embodiment of the present disclosure.
  • FIGS. 7a-7c are schematic diagrams showing a touch electrode after a conductive connection line is added according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram showing a relative positional relationship between a conductive connection line and a second signal transmission line and a first compensation line according to an embodiment of the present disclosure
  • FIG. 9 is a schematic cross-sectional view of a touch substrate according to an embodiment of the present disclosure.
  • the touch signal substrate is disposed between the opposite edges of the touch area by the signal transmission line.
  • the signal transmission lines There is a requirement for the arrangement of the signal transmission lines, so that there is no need to set the frame on the outer side of the opposite two edges, so that the frame width of the touch substrate can be reduced.
  • the touch substrate of the embodiment of the present disclosure has a peripheral area and a touch area, the touch area has opposite first and second edges, and the touch substrate includes: a bonding terminal disposed in the peripheral area, a touch electrode disposed on the touch area and a signal transmission line connecting the bonding terminal and the touch electrode, the signal transmission line being located between the first edge and the second edge.
  • the touch area 101 of the touch substrate of the embodiment of the present disclosure has a first first edge 1011 and a second edge 1012 .
  • the signal transmission lines connecting the bonding terminal and the touch electrode are located between the first edge 1011 and the second edge 1012, and therefore, relative to the prior art, on the left side of the touch area (ie, the first edge 1011 The left side) and the right side of the touch area (ie, the right side of the second edge 1012) no longer have the signal transmission line 1013 as shown in FIG. 2.
  • the left and right sides of the touch area are also There is no longer a need for the setting of the bezel, so the width of the bezel of the touch substrate can be reduced.
  • the above example is an example in which the first edge and the second edge are respectively the left and right edges of the touch area, but when the signal transmission line is located between the opposite upper edge and the lower edge, the touch is also performed.
  • the upper and lower sides of the area no longer have the need to set the frame, so the frame width of the touch substrate can also be reduced.
  • the bonding terminal includes: a first bonding terminal 1041 and a second bonding terminal 1042 between the first edge 1011 and the second edge 1012;
  • the touch electrode includes: a first touch electrode 1021 and a second touch electrode 1022;
  • the signal transmission line includes: a first signal transmission line 1051 connecting the first bonding terminal 1041 and the first touch electrode 1021, and a second signal transmission line connecting the second bonding terminal 1042 and the second touch electrode 1022 1052;
  • the first touch electrode 1021 extends along the bonding terminal 1041/1042 toward the display area 101, and the second touch electrode 1022 is disposed across the first touch electrode 1021.
  • the first signal transmission line 1051 is disposed in the same layer as the first touch electrode 1021.
  • the second signal transmission line 1052 includes:
  • the first part is disposed in a different layer from the second touch electrode 1022;
  • the second portion connected to the first portion through the via is disposed in the touch region 101, disposed in the same layer as the second touch electrode 1022, and is electrically connected.
  • the touch substrate of the embodiment of the present disclosure changes the second between the second touch electrode 1022 and the second bonding terminal 1042 .
  • the distribution manner and the connection manner of the signal transmission line 1052 completely change the position of the second signal transmission line 1052 between the second touch electrode 1022 and the second bonding terminal 1042 of the prior art, so as to be completely distributed in the touch area.
  • the connection between the second signal transmission line 1052 and the second touch electrode 1022 is realized by the segmented design.
  • the second signal transmission line 1052 is divided into two parts, wherein the first part and the second touch electrode 1022 are disposed in different layers (in view of the need to simplify the manufacturing process and reduce the cost, the present disclosure is embodied.
  • the first part is disposed in the same layer as the first touch electrode 1021, but it should be understood that the first part may also be any layer outside the layer where the second touch electrode 1022 is located, as long as it is not guaranteed.
  • the electrical connection can be made directly to the second touch electrode 1022, and the other portion is disposed in the same layer as the second touch electrode 1022 and form an electrical connection.
  • a connection is formed between the first portion and the second portion through the via holes.
  • the two components of the second signal transmission line 1052 are located between the first edge 1011 and the second edge 1012, thus making the first edge 1011 and the second edge 1012 away from the touch area 101. There is no need to set up a signal transmission line. Therefore, there is no need to set the frame on the left and right sides of the touch area, so the frame width of the touch substrate can be reduced.
  • the second signal transmission line 1052 needs to be disposed in the touch area 101.
  • the signal transmitted on the second signal transmission line 1052 affects the original signal in the first touch electrode and/or the second touch electrode, thereby affecting the touch. Control the touch performance of the substrate.
  • the touch substrate of the embodiment of the present disclosure further includes:
  • the first touch virtual electrode 1061 is disposed between the first portion and the adjacent first touch electrode 1021; and/or
  • the second touch virtual electrode 1062 is disposed between the second portion and the adjacent second touch electrode 1022.
  • the first touch virtual electrode and the second touch virtual electrode are disposed between the adjacent first touch electrodes 1021 and the adjacent second signal transmission lines 1052 and the second touch electrodes 1022. There are touch virtual electrodes in between.
  • the touch virtual electrodes form a signal shielding area between the adjacent first touch electrodes 1021 and between the adjacent second signal transmission lines 1052 and the second touch electrodes 1022, and the second signal transmission line 1052 is lowered.
  • the signal transmitted on the first touch electrode 1021 and the second touch electrode 1022 interferes with the signal, thereby improving the touch performance.
  • the touch substrate is often used in conjunction with the display substrate, and there is a certain mutual influence between the two.
  • the second signal transmission line 1052 exists in the touch area, and the longitudinal length and the lateral length of the second signal transmission line 1052 connected to the different second touch electrodes 1022 are different.
  • the second signal transmission line 1052 connected to the lowermost second touch electrode 1022 has the longest length in both the longitudinal direction and the lateral direction, and is connected to the uppermost second touch.
  • the second signal transmission line 1052 of the electrode 1022 has the shortest length in both the longitudinal direction and the lateral direction. Therefore, the second signal transmission line 1052 is unevenly arranged in the entire touch area, and such unevenness may cause different portions of the display area to be affected differently, resulting in different display effects of different display areas.
  • the first of the second signal transmission lines 1052 connected to the different second touch electrodes 1022 has a different length, as shown in FIG. 5a, and the touch substrate further includes:
  • the first compensation line 1053 disposed in the touch area extends along an end of the corresponding first portion away from the bonding terminal to an edge of the display area, and is electrically isolated from the corresponding first portion.
  • the second portion of the second signal transmission line 1052 connected to the different second touch electrodes 1022 has a different length, as shown in FIG. 5a.
  • the control substrate also includes:
  • a second compensation line 1054 disposed in the touch area extends along an end of the corresponding second portion that is connected to the first portion to an edge of the display area, and a corresponding second Partially electrically isolated.
  • first compensation line 1053 and the second compensation line 1054 in broken lines does not indicate that the transmission line is broken.
  • the first compensation line 1053 and the first compensation line 1054 are electrically isolated from the first portion and the second portion of the second signal transmission line by the setting of the compensation line. Therefore, it does not affect the signal transmission between the second touch electrode 1022 and the touch driving chip that the second signal transmission line bears.
  • the first portion of the second signal transmission line 1052 and the corresponding first compensation line are merged into one conductive line running through the upper and lower sides of the display area, and the second part of the second signal transmission line 1052 and The corresponding second compensation lines are merged into one conductive line running through the left and right sides of the display area.
  • FIG. 5a It can be seen from FIG. 5a that the conductive lines disposed in the touch area are uniformly distributed, which solves the problem that the display effects of different display areas are different due to the uneven distribution of the conductive lines in FIG. 3 and FIG. 4, and the display effect is improved. .
  • the compensation line is separately provided only for the first portion and the second portion.
  • the embodiment of the present disclosure may further provide an independent compensation line to further improve the conductive line. Distribution uniformity.
  • FIG. 5b The schematic diagram of adding the above independent compensation line is shown in FIG. 5b, and it can be found that the uniformity of the distribution of the conductive lines in the longitudinal and lateral directions is further enhanced, thereby further improving the touch effect and the display. Uniformity of the display.
  • the touch substrate may be a touch electrode formed based on a transparent conductive material such as ITO.
  • a touch substrate formed by a touch electrode formed of a transparent conductive material such as ITO since the ITO material has a much larger resistance than a general metal material, as the size of the touch screen substrate increases, the RC delay increases, resulting in a touch. The result of the control is not accurate.
  • the touch substrate is a touch substrate formed based on a metal mesh.
  • the metal material Since the metal material has a much smaller resistance of ITO, it is more suitable for a large-sized touch substrate. At the same time, since the metal material has better flexibility than the ITO material, it is more suitable for a flexible display.
  • the metal material has a greater advantage in price, and the touch substrate formed based on the metal mesh can also reduce the cost of the touch substrate.
  • the metal is used as the touch electrode to be hollowed out to form a metal mesh to reduce the influence of the touch electrode on the operation of the display substrate.
  • the metal grid is directly disconnected to form adjacent touch electrodes as shown in FIG. 6.
  • tip structures 601 ie, the portions surrounded by the dotted circles in the figure
  • electrical signals need to be transmitted on the touch electrodes. Due to the presence of the tip structure 601, the tip structure 601 on the adjacent touch electrodes has a tip discharge phenomenon, and the adjacent touch electrodes are turned on, resulting in a decrease in touch detection performance.
  • the above phenomenon may occur between any adjacent electrodes.
  • the above phenomenon may be generated between the touch virtual electrodes, the touch virtual electrodes and the touch electrodes, but the above The description is made by taking a touch electrode as an example.
  • the touch substrate further includes at least one conductive connection line, each of the conductive connection lines corresponding to a metal mesh connecting the plurality of tip structures on the corresponding metal mesh.
  • FIG. 7a a schematic diagram of a conductive connection line 701 is added to an electrode formed on a metal mesh according to an embodiment of the present disclosure. It can be found that, due to the presence of the conductive connection line 701, the tip discharge 601 on the adjacent side of the adjacent touch electrodes in FIG. 7a is effectively eliminated, thereby greatly reducing the occurrence of tip discharge and improving Touch detection quality.
  • the above-described conductive connection line 701 may communicate only a part of the tip discharge 601. As shown in FIGS. 7b and 7c, as long as the tip structure can be reduced, the tip discharge phenomenon can be reduced, and thus the touch detection quality can be improved.
  • FIG. 8 is a schematic diagram showing the relative positional relationship between the increased conductive connection line 701 and the second signal transmission line 1052 and the first compensation line 1053.
  • FIG. 9 is a schematic cross-sectional view of a touch substrate according to an embodiment of the present disclosure. The manufacturing process of the touch substrate according to the embodiment of the present disclosure is briefly described below with reference to FIG. 9 .
  • a pattern including a first touch electrode 1021, a first portion of the second signal transmission line 1052, and a first touch dummy electrode 1061 is formed on the passivation layer 803, wherein the first portion of the first signal transmission line 1052 passes through a via formed in one step is connected to a second portion of the second signal transmission line 1052;
  • a protective layer covering the upper formed pattern is formed, and a via structure connected to the second portion of the second signal transmission line 1052 is left.
  • an embodiment of the present disclosure further provides a touch panel including the above touch substrate.
  • the embodiment of the present disclosure further provides a touch display device, including any of the above touch substrates.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控基板、触控面板及显示装置，上述触控基板具有外围区域和触控区域（101），所述触控区域（101）具有相对的第一边缘（1011）和第二边缘（1012），所述触控基板包括：布置于外围区域内的邦定端子（1041, 1042）、布置于触控区域（101）的触控电极（1021, 1022）以及连接所述邦定端子（1041, 1042）和触控电极（1021, 1022）的信号传输线（1051, 1052），所述信号传输线（1051, 1052）位于第一边缘（1011）和第二边缘（1012）之间。

Description

触控基板、触控面板及显示装置
相关申请的交叉引用
本申请主张在2014年12月3日在中国提交的中国专利申请号No.201410724519.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及触控技术领域，特别是一种触控基板、触控面板及显示装置。
背景技术
触摸屏是一种应用越来越广泛的外部输入设备，其通过指点物(如手指、电子笔等)接触触摸面板实现输入，使人机交互更为直接，其具有简单、快捷、人性化等特点。
如图1所示，现有的触摸面板包括触控区域(虚线框所包围的区域)和外围区域，其中，触摸面板的触控区域中交叉设置有条状触控电极。
设置于触控区域的条状触控电极都需要通过分布于外围区域的信号传输线实现与邦定端子的电连接，以通过邦定端子电连接到触控驱动芯片(未示出)，在触控电极和触控驱动芯片之间传输用于位置检测的信号(包括发射信号和感应信号)。
然而出于使用方便以及美观的需要，电子产品对更窄边框、甚至于无边框的设计需求越来越迫切。然而，如图1所示，在现有技术中，这些分布于外围区域的信号传输线由于工艺限制，具有一定的线宽和线距(如线宽20um，线距30um)。因此，在现有技术中，触控面板必须设计足够宽度(即图1中的d)的边框来遮挡上述的设置有信号传输线的外围区域，而无法满足现有的窄边框、甚至无边框的设计需求。
发明内容
本公开实施例的目的在于提供一种触控基板、触控面板及显示装置，以降低触控面板的边框宽度。
为了实现上述目的，本公开实施例提供了一种触控基板，具有外围区域和触控区域，所述触控区域具有相对的第一边缘和第二边缘，所述触控基板包括：布置于外围区域内的邦定端子、布置于触控区域的触控电极以及连接 所述邦定端子和触控电极的信号传输线，所述信号传输线位于第一边缘和第二边缘之间。
上述的触控基板，其中：
所述邦定端子包括：位于第一边缘和第二边缘之间的第一邦定端子和第二邦定端子；
所述触控电极包括：第一触控电极和第二触控电极；
所述信号传输线包括：连接所述第一邦定端子和第一触控电极的第一信号传输线和连接所述第二邦定端子和第二触控电极的第二信号传输线1052；
所述第一触控电极沿所述邦定端子朝向所述显示区域的方向延伸，所述第二触控电极与所述第一触控电极交叉设置；
所述第一信号传输线与所述第一触控电极同层设置；
所述第二信号传输线包括：
第一部分，与所述第二触控电极异层设置；
与所述第一部分通过过孔连接的第二部分，布置于触控区域内，与所述第二触控电极同层设置，并形成电连接。
上述的触控基板，其中：所述第一部分与所述第一触控电极同层设置。
上述的触控基板，其中：所述触控基板还包括：
第一触控虚拟电极，设置于所述第一部分和相邻的所述第一触控电极之间；和/或
第二触控虚拟电极，设置于所述第二部分和相邻的所述第二触控电极之间。
上述的触控基板，其中：所述第一触控电极、第二触控电极、第一触控虚拟电极以及第二触控虚拟电极由金属网格形成，所述触控基板还包括至少一根导通连接线，每一根导通连接线对应于一个金属网格，连通对应的金属网格上的多个尖端结构。
上述的触控基板，其中：连接到不同的第二触控电极的第一部分长度不同，所述触控基板还包括：
与所述第一部分对应，设置于所述触控区域内的第一补偿线，沿对应的第一部分的远离邦定端子的一端延伸至显示区域的边缘，与对应的第一部分 电隔离。
上述的触控基板，其中：连接到不同的第二触控电极的第二部分的长度不同，所述触控基板还包括：
与所述第二部分对应，设置于所述触控区域内的第二补偿线，沿对应的第二部分的与所述第一部分连接的一端延伸至显示区域的边缘，与对应的第二部分电隔离。
为了实现上述目的，本公开实施例还提供了一种包括上述触控基板的触控面板。
为了实现上述目的，本公开实施例还提供了一种触摸显示装置，包括上述的触控面板。
本公开实施例具有如下的有益效果：
在本公开实施例的触控基板、触控面板及显示装置中，通过将所述信号传输线设置于触控区域的相对的两个边缘之间，使得触控基板在上述相对的两个边缘之外不再有信号传输线的布置需求，因此在上述相对的两个边缘的外侧也就不再存在边框的设置需求，因此能够降低触摸面板的边框宽度。
附图说明
图1表示现有技术的触控基板的结构示意图；
图2表示根据本公开实施例的触控基板和现有技术的触控基板的对比示意图；
图3表示根据本公开实施例的一种触控基板的结构示意图；
图4表示根据本公开实施例的增加触控虚拟电极后的触控基板的结构示意图；
图5a表示根据本公开实施例的一种增加补偿线后的触控基板的结构示意图；
图5b表示根据本公开实施例的另一种增加补偿线后的触控基板的结构示意图；
图6表示根据本公开实施例的基于金属网格的触控电极的结构示意图；
图7a-图7c表示根据本公开实施例增加导通连接线后的触控电极的示意图；
图8表示根据本公开实施例增加的导通连接线和第二信号传输线以及第一补偿线的相对位置关系示意图；
图9为根据本公开实施例的触控基板的截面示意图。
具体实施方式
在本公开实施例的触控基板及触摸显示装置中，通过将所述信号传输线设置于触控区域的相对的两个边缘之间，使得触控基板在上述相对的两个边缘之外不再有信号传输线的布置需求，因此在上述相对的两个边缘的外侧也就不再存在边框的设置需求，因此能够降低触摸基板的边框宽度。
本公开实施例的触控基板，具有外围区域和触控区域，所述触控区域具有相对的第一边缘和第二边缘，所述触控基板包括：布置于外围区域内的邦定端子、布置于触控区域的触控电极以及连接所述邦定端子和触控电极的信号传输线，所述信号传输线位于第一边缘和第二边缘之间。
对此结合图2说明如下，如图2所示，本公开实施例的触控基板的触控区域101具有相对的第一边缘1011和第二边缘1012，在本公开的具体实施例中，由于连接邦定端子和触控电极的信号传输线都位于第一边缘1011和第二边缘1012之间，因此，相对于现有技术而言，其在触控区域的左侧(即第一边缘1011的左侧)和触控区域的右侧(即第二边缘1012的右侧)不再存在如图2所示的信号传输线1013。
由于在触控区域的左右两侧上不再存在信号传输线，而边框的作用就是用于遮挡设置于外围区域的信号传输线，因此，本公开具体实施例中，在触控区域的左右两侧也就不再存在边框的设置需求，因此能够降低触摸基板的边框宽度。
当然，上述的举例是以第一边缘和第二边缘分别为触控区域的左右边缘为例进行的说明，但当所述信号传输线位于相对的上边缘和下边缘之间时，同样在触控区域的上下两侧也就不再存在边框的设置需求，因此也能够降低触摸基板的边框宽度。
下面以更加具体的例子对本公开实施例进行进一步详细说明如下。
如图3所示，本公开实施例中，所述邦定端子包括：位于第一边缘1011和第二边缘1012之间的第一邦定端子1041和第二邦定端子1042；
所述触控电极包括：第一触控电极1021和第二触控电极1022；
所述信号传输线包括：连接所述第一邦定端子1041和第一触控电极1021的第一信号传输线1051和连接所述第二邦定端子1042和第二触控电极1022的第二信号传输线1052；
所述第一触控电极1021沿所述邦定端子1041/1042朝向所述显示区域101的方向延伸，所述第二触控电极1022与所述第一触控电极1021交叉设置；
所述第一信号传输线1051与所述第一触控电极1021同层设置；
所述第二信号传输线1052包括：
第一部分，与所述第二触控电极1022异层设置；
与所述第一部分通过过孔连接的第二部分，布置于触控区域101内，与所述第二触控电极1022同层设置，并形成电连接。
结合图1和图3所示，相对于现有技术的触控基板而言，本公开具体实施例的触控基板改变了第二触控电极1022与第二邦定端子1042之间的第二信号传输线1052的分布方式以及连接方式，将现有技术的第二触控电极1022与第二邦定端子1042之间的第二信号传输线1052的位置完全改变，使之完全分布于触控区域的第一边缘1011和第二边缘1012之间。同时通过分段式设计来实现第二信号传输线1052与第二触控电极1022的连接。
如图3所示，可以发现，第二信号传输线1052分为两部分，其中第一部分与所述第二触控电极1022异层设置(考虑到简化制作工艺以及降低成本的需求，本公开具体实施例中，第一部分是与第一触控电极1021同层设置，但应当理解的是，第一部分也可以是处于第二触控电极1022所在的层之外的任意一层，只要保证其不会直接与第二触控电极1022形成电连接即可)，而另一部分则与所述第二触控电极1022同层设置，并形成电连接。第一部分和第二部分之间通过过孔形成连接。
如图3所示，第二信号传输线1052的两个组成部分都位于第一边缘1011和第二边缘1012之间，因此使得第一边缘1011和第二边缘1012的远离触控区域101的一侧不需要再设置信号传输线。因此在触控区域的左右两侧也就不再存在边框的设置需求，因此能够降低触摸基板的边框宽度。
结合图1和图3来看，在现有技术的触控基板中，在触控区域内并没有信号传输线的存在；而在本公开实施例的触控基板中，为了减小边框的宽度，如图3所示，需要在触控区域101内布置第二信号传输线1052。
当第二信号传输线1052在触控区域内布置时，第二信号传输线1052上传输的信号就会对第一触控电极和/或第二触控电极中原有的信号的产生影响，进而影响触控基板的触控性能。
为了减小触控区域101内布置的第二信号传输线1052对触控电极的影响，如图4所示，本公开实施例的所述触控基板还包括：
第一触控虚拟电极1061，设置于所述第一部分和相邻的所述第一触控电极1021之间；和/或
第二触控虚拟电极1062，设置于所述第二部分和相邻的所述第二触控电极1022之间。
通过上述的第一触控虚拟电极和第二触控虚拟电极的设置，使得在相邻的第一触控电极1021之间以及在相邻的第二信号传输线1052和第二触控电极1022之间都存在触控虚拟电极。这些触控虚拟电极在相邻的第一触控电极1021之间以及在相邻的第二信号传输线1052和第二触控电极1022之间形成了一个信号屏蔽区域，降低了第二信号传输线1052上传输的信号对第一触控电极1021以及第二触控电极1022的信号干扰，提高了触控性能。
在现有技术中，触控基板经常和显示基板配合使用，二者之间会有一定的相互影响。对于现有技术而言，在触控区域中存在第二信号传输线1052，而连接到不同的第二触控电极1022的第二信号传输线1052的纵向长度和横向长度均不相同。如图3和图4所示，连接到最下方的第二触控电极1022的第二信号传输线1052不管在纵向方向和横向方向都具有最长的长度，而连接到最上方的第二触控电极1022的第二信号传输线1052不管在纵向方向和横向方向都具有最短的长度。因此，第二信号传输线1052在整个触控区域中排布并不均匀，而这种不均匀会造成显示区域的各个部分受到不同的影响而导致不同显示区域的显示效果不同。
为了减低这种由于信号传输线排布不均而带来的影响，在本公开的具体实施例中，连接到不同的第二触控电极1022的第二信号传输线1052的第一 部分(即与第一触控电极1021同层分布的部分)长度不同，如图5a所示，并且所述触控基板还包括：
与所述第一部分对应，设置于所述触控区域内的第一补偿线1053，沿对应的第一部分的远离邦定端子的一端延伸至显示区域的边缘，与对应的第一部分电隔离。
而同时连接到不同的第二触控电极1022的第二信号传输线1052的第二部分(即与第二触控电极1022同层分布的部分)的长度不同，如图5a所示，所述触控基板还包括：
与所述第二部分对应，设置于所述触控区域内的第二补偿线1054，沿对应的第二部分的与所述第一部分连接的一端延伸至显示区域的边缘，与对应的第二部分电隔离。
应当理解的是，上述的第一补偿线1053和第二补偿线1054以虚线描述并不表示传输线是断裂的。
可以发现，在本公开具体实施例中，通过上述的补偿线的设置，首先由于第一补偿线1053和第一补偿线1054与第二信号传输线的第一部分和第二部分均为电隔离的状态，因此其不会影响第二信号传输线所承担的在第二触控电极1022和触控驱动芯片之间的信号传输。
同时，通过上述的补偿线的设置，使得第二信号传输线1052的第一部分和对应的第一补偿线合并成为一条贯穿显示区域上下两侧的导电线，而第二信号传输线1052的第二部分和对应的第二补偿线合并成为一条贯穿显示区域左右两侧的导电线。
从图5a中可以发现，设置于触控区域中的导电线呈现均匀分布，解决了图3和图4中导电线分布不均匀而导致的不同显示区域的显示效果不同的问题，提高了显示效果。
当然，上述的实施例中，仅仅针对第一部分和第二部分分别设置了补偿线，但为了进一步提高导电线的分布均匀性，本公开实施例还可以设置独立的补偿线，进一步提高导电线的分布均匀性。
增加上述独立的补偿线后的示意图如图5b所示，可以发现在纵向和横向上导电线的分布均匀性得到了进一步加强，也就进一步提高了触控效果和显 示的均匀性。
在本公开的具体实施例中，上述的触控基板可以是基于ITO等透明导电材料形成的触控电极。
在基于ITO等透明导电材料形成的触控电极所形成的触摸基板中，由于ITO材料具有比一般金属材料大得多的电阻，因此随着触摸屏基板的尺寸增大，RC延迟增加，而导致触控结果的不准确。
因此，在本公开的具体实施例中，上述的触控基板采用基于金属网格形成的触控基板。
由于金属材料具有ITO小得多的电阻，因此其更加能适用于大尺寸的触控基板。同时由于金属材料具有比ITO材料更好的柔性，因此其更加适用于柔性显示器。
同时，相对于ITO材料，在价格上金属材料具有更大的优势，基于金属网格形成的触控基板也能够降低触控基板的成本。
由于金属的不透光特性，因此在使用金属作为触控电极需要对其进行镂空，形成金属网格，以降低触控电极对显示基板的工作的影响。
在形成金属网格后，直接对金属网格进行断开操作，即可形成如图6所示的相邻的触控电极。
从图6中可以发现，由于是对金属网格进行断开，因此在触控电极的边缘上，存在大量的尖端结构601(即图中虚线圆圈所包围的部分)。当触控基板工作时，触控电极上需要进行电信号的传输。而由于上述尖端结构601的存在，上述相邻的触控电极上距离比较接近的尖端结构601就会发生尖端放电现象，导通相邻的触控电极，导致触控检测性能降低。
当然，上述现象可能在任何相邻的电极之间产生，如增加触控虚拟电极之后，上述的现象可能在触控虚拟电极之间、触控虚拟电极和触控电极之间产生，只不过上述是以触控电极为例进行的说明。
在本公开的具体实施例中，为了避免尖端放电的发生，当上述的第一触控电极、第二触控电极、第一触控虚拟电极以及第二触控虚拟电极由金属网格形成时，所述触控基板还包括至少一根导通连接线，每一根导通连接线对应于一个金属网格，连通对应的金属网格上的多个尖端结构。
如图7a所示，为本公开实施例的在基于金属网格形成的电极上增加导通连接线701之后的示意图。可以发现，由于导通连接线701的存在，图7a中相邻的触控电极上相邻侧边上的尖端放电601都得到了有效的消除，因此大大降低了尖端放电现象的发生，能够提高触摸检测质量。
但应当理解的是，上述的导通连接线701也可以仅连通一部分尖端放电601，如图7b、7c所示，只要能够减少尖端结构，就能够减少尖端放电现象，因此能够提高触摸检测质量。
如图7c所示，当该导通连接线701形成矩形框包围上述的金属网格，将所有的尖端结构都连通之后即可完全消除金属网格上的尖端结构。
图8为增加的导通连接线701和第二信号传输线1052、第一补偿线1053的相对位置关系示意图。
图9为本公开实施例的触控基板的截面示意图，结合图9对本公开实施例的触控基板的制作过程简要说明如下。
首先形成基底801；
在形成的基底801之上形成包括第二触控电极、第二信号传输线1052的第二部分、第二触控虚拟电极在内的图形；
形成覆盖上一部形成的图案的钝化层803，并保留与第二信号传输线1052的第二部分连接的过孔结构；
在钝化层803之上形成包括第一触控电极1021、第二信号传输线1052的第一部分、第一触控虚拟电极1061在内的图形，其中第二信号传输线的1052的第一部分会通过上一步形成的过孔与第二信号传输线的1052的第二部分连接；
形成覆盖上一部形成的图案的保护层，并保留与第二信号传输线1052的第二部分连接的过孔结构。
为了实现上述目的，本公开实施例还提供了一种包括上述触控基板的触控面板。
本公开实施例还提供了一种触摸显示装置，包括上述任意的触控基板。
本领域的普通技术人员应当理解，可以对本公开的技术方案进行修改或者等同替换，而不脱离本公开技术方案的精神范围，其均应涵盖在本公开的 权利要求范围当中。

Claims (9)

  1. 一种触控基板，具有外围区域和触控区域，所述触控区域具有相对的第一边缘和第二边缘，所述触控基板包括：布置于外围区域内的邦定端子、布置于触控区域的触控电极以及连接所述邦定端子和触控电极的信号传输线，其中，所述信号传输线位于第一边缘和第二边缘之间。
  2. 根据权利要求1所述的触控基板，其中：
    所述邦定端子包括：位于第一边缘和第二边缘之间的第一邦定端子和第二邦定端子；
    所述触控电极包括：第一触控电极和第二触控电极；
    所述信号传输线包括：连接所述第一邦定端子和第一触控电极的第一信号传输线和连接所述第二邦定端子和第二触控电极的第二信号传输线；
    所述第一触控电极沿所述邦定端子朝向所述显示区域的方向延伸，所述第二触控电极与所述第一触控电极交叉设置；
    所述第一信号传输线与所述第一触控电极同层设置；
    所述第二信号传输线包括：
    第一部分，与所述第二触控电极异层设置；
    与所述第一部分通过过孔连接的第二部分，布置于触控区域内，与所述第二触控电极同层设置，并形成电连接。
  3. 根据权利要求2所述的触控基板，其中，所述第一部分与所述第一触控电极同层设置。
  4. 根据权利要求2所述的触控基板，其中，所述触控基板还包括：
    第一触控虚拟电极，设置于所述第一部分和相邻的所述第一触控电极之间；和/或
    第二触控虚拟电极，设置于所述第二部分和相邻的所述第二触控电极之间。
  5. 根据权利要求4所述的触控基板，其中，所述第一触控电极、第二触控电极、第一触控虚拟电极以及第二触控虚拟电极由金属网格形成，所述触控基板还包括至少一根导通连接线，每一根导通连接线对应于一个金属网格， 连通对应的金属网格上的多个尖端结构。
  6. 根据权利要求2所述的触控基板，其中，连接到不同的第二触控电极的第一部分长度不同，所述触控基板还包括：
    与所述第一部分对应，设置于所述触控区域内的第一补偿线，沿对应的第一部分的远离邦定端子的一端延伸至显示区域的边缘，与对应的第一部分电隔离。
  7. 根据权利要求6所述的触控基板，其中，连接到不同的第二触控电极的第二部分的长度不同，所述触控基板还包括：
    与所述第二部分对应，设置于所述触控区域内的第二补偿线，沿对应的第二部分的与所述第一部分连接的一端延伸至显示区域的边缘，与对应的第二部分电隔离。
  8. 一种触控面板，包括权利要求1-7中任意一项所述的触控基板。
  9. 一种触摸显示装置，包括权利要求8中所述的触控面板。
PCT/CN2015/075872 2014-12-03 2015-04-03 触控基板、触控面板及显示装置 WO2016086561A1 (zh)

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