WO2015010507A1 - 触控电极结构及其应用之触控面板 - Google Patents

触控电极结构及其应用之触控面板 Download PDF

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Publication number
WO2015010507A1
WO2015010507A1 PCT/CN2014/080032 CN2014080032W WO2015010507A1 WO 2015010507 A1 WO2015010507 A1 WO 2015010507A1 CN 2014080032 W CN2014080032 W CN 2014080032W WO 2015010507 A1 WO2015010507 A1 WO 2015010507A1
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WO
WIPO (PCT)
Prior art keywords
axial sensing
substrate
sensing electrodes
touch panel
touch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/080032
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English (en)
French (fr)
Inventor
张普欣
李瑞兴
陈福城
黄志奎
聂世波
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TPK Touch Systems Xiamen Inc
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TPK Touch Systems Xiamen Inc
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Publication of WO2015010507A1 publication Critical patent/WO2015010507A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446Digitisers, 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
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Definitions

  • touch panels have gradually become the most important input interface, and are widely used in various electronic products, such as mobile phones, personal digital assistants (PDAs) or palm-sized personal computers.
  • PDAs personal digital assistants
  • palm-sized personal computers are widely used in various electronic products, such as mobile phones, personal digital assistants (PDAs) or palm-sized personal computers.
  • FIG. 1 is a schematic plan view of a conventional touch panel 10 .
  • the conventional touch panel 10 is generally provided with a rectangular touch area A, and the touch electrode structure 11 is disposed in the touch area A.
  • the touch electrode structure has a plurality of first axial sensing electrodes 12 arranged along the longitudinal direction of the touch area A (for example, the Y-axis direction) and a plurality of horizontal directions along the touch area A (for example, the X-axis direction).
  • the second axial sensing electrodes 14 are arranged.
  • the touch panel structure of the touch panel is designed such that the terminals of the sensing electrodes are located only on one of the opposite sides of the touch area, so that the touch panel is
  • the frame design is more flexible than the terminal layout of the sensing electrodes and the corresponding wire routing.
  • the first axial sensing electrode and the second axial sensing electrode are alternately disposed at an oblique angle through the layout design of the sensing electrodes of the touch electrode structure, and the two axial sensing are performed.
  • the terminals of the electrodes are concentrated on one of the opposite sides of the touch area, so that the wires can be disposed only in an area adjacent to one of the opposite sides of the touch area, and the design of the touch panel in the frame is increased.
  • Elasticity for example, the touch panel can be designed with no border or narrow border on the opposite side of the touch panel, thereby maximizing the visible area of the touch panel.
  • 1 is a schematic plan view of a conventional touch panel
  • 2B is a schematic plan view of the other side of the touch panel according to an embodiment of the invention.
  • FIG. 5-8 are cross-sectional views of various embodiments of the touch panel along section line 4-4' of Fig. 3.
  • the touch panel of the embodiment of the present invention is defined as a rectangular touch area, and includes a touch electrode structure and a wire group.
  • the layout area of the touch electrode structure determines the touch area of the touch panel.
  • the wire group is a peripheral area disposed outside the touch area and adjacent to the touch area, and is electrically connected. Contact control electrode structure.
  • FIG. 2A is a schematic plan view of one side of the touch panel 100 according to an embodiment of the invention.
  • 2A is only a plane view of one side of the touch panel 100, and thus only a plurality of first axial sensing electrodes 110 in the touch electrode structure of the touch panel 100 are illustrated.
  • An axial sensing electrode 110 is arranged in parallel along an oblique line of the touch area A.
  • the oblique line described in this embodiment is represented by, for example, a diagonal line of the touch area A.
  • the diagonal direction of the touch area A of the embodiment is the first axial direction. D1.
  • the oblique line is not limited to the diagonal direction. Any angle that can form a non-perpendicular relationship with either side of the touch area A is a range of oblique lines defined by the present invention.
  • the first axial sensing electrodes 110 of the present embodiment are disposed at an oblique angle to either side of the touch area A, so that the terminals 110a of each of the first axial sensing electrodes 110 can be It is only arranged on one of the opposite sides of the touch area A.
  • the terminal ends 110a of all the first axial sensing electrodes 110 of the present embodiment are respectively disposed on the upper side and the opposite side of the touch area A, respectively, in a plan view and a set orientation. Side.
  • the pair of opposite sides (the upper side and the lower side) of the touch area A are further adjacent to the first peripheral area P1 and the second peripheral area P2, respectively.
  • the terminal 110a disposed on the upper side of the touch area A is adjacent to the first peripheral area P1
  • the terminal disposed on the lower side of the touch area A is disposed.
  • 110a is adjacent to the second peripheral zone P2.
  • FIG. 2B is a schematic plan view of the other side of the touch panel 100 according to an embodiment of the invention.
  • 2B is only used to show the planar view of the other side of the touch panel 100. Therefore, only a plurality of second axial sensing electrodes 120 in the touch electrode structure of the touch panel 100 are illustrated.
  • the second axial sensing electrodes 120 are arranged in parallel along another oblique line of the touch area A, and are alternately electrically insulated from the first axial sensing electrodes 110 in FIG. 2A.
  • another oblique line according to the embodiment is represented by another diagonal line of the touch area A, in other words, another diagonal of the touch area A according to the embodiment.
  • the line direction is the second axial direction D2.
  • FIG. 2B also shows only a plurality of third wires 122 and a plurality of fourth wires 126 in the wire group of the touch panel 100.
  • the third wire 122 is disposed in the first peripheral region P1 for electrically connecting the terminal 120a disposed in the second axial sensing electrode 120 adjacent to the first peripheral region P1;
  • the fourth wire 126 is disposed in the second peripheral region P2 is used to electrically connect the terminal 120a of the second axial sensing electrode 120 disposed adjacent to the second peripheral region P2.
  • FIG. 3 is a schematic diagram of an embodiment of the touch panel 100 combined with FIG. 2A and FIG. 2B .
  • the touch electrode structure of the touch panel 100 includes a first axial sensing electrode 110 and a second axial sensing electrode 120 that are interlaced with each other, and the wire group of the touch panel 100 includes an electrical connection.
  • the first wire 112 and the second wire 116 of the axial sensing electrode 110 and the third wire 122 and the fourth wire 126 of the second axial sensing electrode 120 are electrically connected.
  • first bonding pads 114 and the third bonding pads 124 located in the first peripheral region P1 may be bonded to the first flexible printed circuit board (not shown), and the second bonding pads 118 located in the second peripheral region P2 and The fourth bond pad 128 is then bonded to a second flexible printed circuit board (not shown).
  • first flexible printed circuit board and the second flexible printed circuit board are electrically connected to an external signal processor (not shown)
  • the 120 is capable of signal transmission to the signal processor through the wire set, the first flexible printed circuit board, and the second flexible printed circuit board.
  • first axial sensing electrode 110 and the second axial sensing electrode 120 illustrated in the embodiment of FIG. 3 are strip electrodes respectively, but the shape of the actual sensing electrode is not designed. This is limited to this.
  • FIG. 4 a schematic diagram of a single sensing electrode according to an embodiment of the invention is shown.
  • the embodiment of FIG. 4 is exemplified by a first axial sensing electrode 110 arranged along the first axial direction D1 in FIG. 3.
  • the first axial sensing electrode 110 includes a plurality of first electrode units 110U and a plurality of The first connection line 110C of the adjacent two first electrode units 110U is electrically connected.
  • the shape design of the first electrode unit 110U is determined according to the specification requirements of different integrated circuits.
  • the shape of the electrode unit 110U of the embodiment of FIG. 4 is designed in a diamond shape. In addition, in other embodiments, the electrode unit 110U The shape can also be square, snowflake or other shapes.
  • the second axial sensing electrodes 120 arranged along the second axial direction D2 in FIG. 3 the same design may be adopted for the first axial sensing electrodes 110, and each of the second axial sensing electrodes 120 may include a plurality of The second electrode unit and the plurality of second connecting lines electrically connected to the adjacent two second electrode units are not further described herein and illustrated in the drawings.
  • the touch panel 100 of the present embodiment includes substrates 101 , 111 , and 121 .
  • the substrate 101 is, for example, a protective cover of the touch panel 100.
  • the lenses 111 and 121 are carrier substrates for the first axial sensing electrodes 110 and the second axial sensing electrodes 120, respectively. Therefore, the substrate 111 is disposed under the substrate 101, and the substrate 121 is disposed under the substrate 111.
  • the first axial sensing electrode 110 and the second axial sensing electrode 120 are disposed under the substrate 101.
  • the upper surface of the substrate 101 is used as a touch surface for the user to operate the touch panel 100.
  • the architecture of the present embodiment is substantially the same as that of the embodiment of FIG. 5, except that the first axial sensing electrode 110 of the present embodiment is formed on the lower surface of the substrate 111.
  • the adhesive layer 103 is actually bonded to the lower surface of the substrate 101 and the upper surface of the substrate 111, and the adhesive layer 105 is attached to the first axial sensing formed on the lower surface of the substrate 111.
  • the electrode 110 and the second axial sensing electrode 120 formed on the upper surface of the substrate 121.
  • the bonding layer 105 of the present embodiment can serve as an insulating layer for electrically isolating the first axial sensing electrode 110 from the second axial sensing electrode 120, and the substrate 121 can be used as the second layer.
  • the protective layer of the axial sensing electrode 120 can serve as an insulating layer for electrically isolating the first axial sensing electrode 110 from the second axial sensing electrode 120, and the substrate 121 can be used as the second layer.
  • the protective layer of the axial sensing electrode 120 can serve as an insulating layer for electrically isolating the first axial sensing electrode 110 from the second axial sensing electrode 120, and the substrate 121 can be used as the second layer.
  • the protective layer of the axial sensing electrode 120 can serve as an insulating layer for electrically isolating the first axial sensing electrode 110 from the second axial sensing electrode 120, and the substrate 121 can be used as the second layer.
  • the protective layer of the axial sensing electrode 120 can serve as an insulating layer
  • the touch panel 100 of the present embodiment further includes an adhesive layer 103 disposed between the substrate 101 and the substrate 121. Further, the adhesive layer 103 of the present embodiment is bonded to the first surface formed on the lower surface of the substrate 101.
  • the axial sensing electrode 110 and the second axial sensing electrode 120 formed on the upper surface of the substrate 121.
  • the bonding layer 103 of the present embodiment can serve as an insulating layer for electrically isolating the first axial sensing electrode 110 from the second axial sensing electrode 120, and the substrate 121 can be used as the second layer.
  • the protective layer of the axial sensing electrode 120 is disposed between the substrate 101 and the substrate 121. Further, the adhesive layer 103 of the present embodiment is bonded to the first surface formed on the lower surface of the substrate 101.
  • the axial sensing electrode 110 and the second axial sensing electrode 120 formed on the upper surface of the substrate 121.
  • the bonding layer 103 of the present embodiment can serve as an insulating layer for electrically isolating the first
  • the touch panel 100 of the present embodiment further includes an adhesive layer 103 and a protective layer 107.
  • the adhesive layer 103 is disposed between the substrate 101 and the substrate 111. Further, the adhesive layer 103 of the present embodiment is bonded to the lower surface of the substrate 101 and the first axial sense formed on the upper surface of the substrate 111.
  • the electrode 110 is measured. Furthermore, since the second axial sensing electrode 120 of the present embodiment is formed on the lower surface of the substrate 111, the protective layer 107 is further formed under the second axial sensing electrode 120 to avoid the second axial direction. The sensing electrode 120 is directly exposed and damaged.
  • the material of the first axial sensing electrode 110 and the second axial sensing electrode 120 may be a transparent conductive material, such as indium tin. Oxide; ITO), the pattern of the first axial sensing electrode 110 and the second axial sensing electrode 120 may be formed by a deposition, lithography, and etching process.
  • the material of the first wire 112, the second wire 116, the third wire 122, the fourth wire 126, the first bonding pad 114, the second bonding pad 118, the third bonding pad 124, and the fourth bonding pad 128 may be metal.
  • alloy materials such as silver, copper, molybdenum, aluminum, or combinations thereof, may be formed by a printing process or by deposition, lithography, and etching processes.
  • the material of the substrate 101 may be a reinforced glass substrate or a plastic substrate, and the materials of the substrates 111 and 121 may be a glass substrate or a plastic film.
  • the adhesive layers 103 and 105 may be, for example, a transparent optical adhesive or a liquid adhesive.
  • the material of the protective layer 107 may be an organic insulating material, such as polyimide, and the protective layer 107 may be formed by a coating or printing process; the material of the protective layer 107 may also be an inorganic insulating material such as silicon dioxide. Or silicon nitride, the protective layer 107 can be formed by a deposition process.
  • the first axial sensing electrode and the second axial sensing electrode are alternately disposed at an oblique angle through the layout design of the sensing electrodes of the touch electrode structure, and the two axial sensing are performed.
  • the terminals of the electrodes are concentrated on one of the opposite sides of the touch area, so that the wires respectively connected to the two axial sensing electrodes need to be disposed adjacent to one of the opposite sides of the touch area.
  • the area increases the flexibility of the touch panel in the design of the border.
  • the touch panel can be designed with no border or narrow border on the opposite side of the touch panel, thereby maximizing the visible area of the touch panel.

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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)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控电极结构,应用于一触控面板(100),触控面板(100)被定义为有一矩形的触控区(A),触控电极结构包括:复数条第一轴向感测电极(110)沿触控区的一斜角线平行排列;及复数条第二轴向感测电极(120)沿触控区(A)的另一斜角线平行排列,并且与第一轴向感测电极(110)电性绝缘地形成交错。其中第一轴向感测电极(110)和第二轴向感测电极(120)的一接线端仅布局于该触控区(A)的其中之一对相对侧边。还提供一种触控面板(100)。借此,让触控面板(100)在边框设计上较不会受限于感测电极的接线端布局及对应的导线布线而更具有弹性。

Description

触控电极结构及其应用之触控面板 技术领域
本发明涉及触控技术,特别有关于触控电极结构及其应用之触控面板。
背景技术
近年来,触控面板逐渐成为最主要的输入介面,被广泛应用在各种电子产品中,例如手机、个人数位助理(PDA)或掌上型个人电脑等。
请参阅图1,其系显示习知的触控面板10之平面示意图。习知的触控面板10通常规划有一矩形的触控区A,并且在触控区A设置触控电极结构11。其中,触控电极结构具有复数条沿着触控区A的纵向(例如Y轴方向)进行排列的第一轴向感测电极12以及复数条沿着触控区A的横向(例如X轴方向)进行排列的第二轴向感测电极14。
在上述的触控电极结构的架构下,第一轴向感测电极12和第二轴向感测电极14的接线端12a、14a会是至少布局于触控区A的相邻的两个侧边。如图1所示的触控面板10,其第一轴向感测电极12的接线端12a是布局于触控区A横向上的一个侧边,而第二轴向感测电极14的接线端14a则是分边布局于触控区A的纵向上两个相对的侧边。如此一来,用来电性连接所述接线端12a、14a的导线16也就至少需要占用在触控区A的相邻的两个侧边所邻接的区域(如周边区B1、B2及B3)。因此,习知触控面板10的触控电极结构无法让触控区A在一方向上相对的两个侧边所邻接的区域面积能够同时减小,降低触控面板10在边框设计上的弹性。
发明内容
有鉴于习知技术存在的上述问题,本发明通过触控面板之触控电极结构的设计,使得感测电极的接线端仅位于触控区的其中之一对相对侧边,让触控面板在边框设计上较不会受限于感测电极的接线端布局及对应的导线布线而更具有弹性。
依据本发明之实施例,提供一种触控电极结构 ,应用于一触控面板,触控面板被定义有一矩形的触控区,触控电极结构包括:复数条第一轴向感测电极,沿触控区的一斜角线平行排列;及复数条第二轴向感测电极,沿触控区的另一斜角线平行排列,并且与第一轴向感测电极电性绝缘地形成交错;其中第一轴向感测电极和该些第二轴向感测电极的一接线端仅布局于触控区的其中之一对相对侧边。
依据本发明之实施例,还提供一种触控面板,触控面板被定义有一矩形的触控区,触控面板包括:如前所述的触控电极结构;以及导线组,电性连接该些第一轴向感测电极的接线端及该些第二轴向感测电极的接线端。
依据本发明之实施例,经由触控电极结构的感测电极的布局设计,采用斜角交错设置的第一轴向感测电极与第二轴向感测电极,让上述两个轴向感测电极的接线端集中在触控区的其中之一对相对侧边上,可以让导线只需设置在触控区的其中之一对相对侧边所邻接的区域,增加了触控面板在边框设计上的弹性。例如可实现触控面板在触控区的另一对相对侧边为无边框或窄边框之设计,进而使得触控面板的可视区达到最大化。
附图说明
图1为习知的触控面板之平面示意图;
图2A依据本发明之一实施例绘示的触控面板之一侧的平面示意图;
图2B依据本发明之一实施例绘示的触控面板之另一侧的平面示意图;
图3由图2A与图2B所组合而成的触控面板之一实施例示意图;
图4依据本发明之一实施例绘示的单一的感测电极之示意图;以及
图5-图8为沿着图3的剖面线4-4’之触控面板之各种实施例剖面示意图。
具体实施方式
下面结合附图与具体实施方式对本发明作进一步详细描述。
本发明实施例之触控面板被定义有一矩形的触控区,并且包括一触控电极结构及一导线组。在实际设计上,触控电极结构的布设区域得以决定触控面板的触控区,此外,导线组是布设于触控区之外且与触控区相邻接的周边区,用来电性连接触控电极结构。
更具体来讲,请参阅图2A,其系依据本发明之一实施例绘示的触控面板100之一侧的平面示意图。由于图2A仅是用来表示触控面板100之一侧的平面态样,因此仅绘示出触控面板100的触控电极结构中的复数条第一轴向感测电极110,其中这些第一轴向感测电极110是沿触控区A的一斜角线来平行排列。为了方便说明,本实施例所述的斜角线是例如以触控区A的对角线来代表说明,换言之,本实施例的触控区A的一对角线走向即为第一轴向D1。当然,斜角线并非仅限于对角线的走向,凡是能与触控区A的任一侧边构成非垂直的夹角皆是属于本发明所定义之斜角线的范围。
承上所述,本实施例的第一轴向感测电极110通过与触控区A的任一侧边呈斜角走向设置,让每一第一轴向感测电极110的接线端110a得以仅布局于触控区A的其中之一对相对侧边上。以图2A之平面示意图所示的俯视视角及设置方位来看,本实施例的所有第一轴向感测电极110的接线端110a是分别布局于触控区A的上侧边及相对的下侧边。
在触控面板100的架构上,前述触控区A的该对相对侧边(上侧边及下侧边)分别进一步邻接第一周边区P1及第二周边区P2。换言之,在所有第一轴向感测电极110中,布局于触控区A的上侧边的接线端110a是邻接第一周边区P1,而布局于触控区A的下侧边的接线端110a是邻接第二周边区P2。
接着,图2A同样仅绘示出触控面板100的导线组中的复数条第一导线112及复数条第二导线116。其中,第一导线112设置于第一周边区P1,用来电性连接第一轴向感测电极110中布局于邻接第一周边区P1的接线端110a;第二导线116设置于第二周边区P2,用来电性连接第一轴向感测电极110中布局于邻接第二周边区P2的接线端110a。
此外,触控面板100更包括设置于第一周边区P1的第一接合垫(bonding pads)114及设置于第二周边区P2的第二接合垫118,让前述的第一导线112经由电路布线来与第一接合垫114电性连接,并且让前述的第二导线116经由电路布线来与第二接合垫118电性连接。由于本实施例的第一轴向感测电极110呈斜角走向设置并且其接线端110a仅布局于触控区A的其中之一对侧边上,让第一导线112及第二导线116也就可以仅布线于触控区A的该对相对侧边所邻接的第一周边区P1及第二周边区P2。
请再参阅图2B,其依据本发明之一实施例绘示的触控面板100之另一侧的平面示意图。由于图2B仅是用来表示触控面板100之另一侧的平面态样,因此仅绘示出触控面板100的触控电极结构中的复数条第二轴向感测电极120,其中这些第二轴向感测电极120是沿触控区A的另一斜角线来平行排列,并且与图2A中的第一轴向感测电极110电性绝缘地形成交错。同样为了方便说明,本实施例所述的另一斜角线是例如以触控区A的另一对角线来代表说明,换言之,本实施例所述的触控区A的另一对角线走向即为第二轴向D2。补充说明的是,本实施例所述的另一斜角线同样是能与触控区A的任一侧边构成非垂直的夹角,但是要与图2A的第一轴向感测电极110所沿的斜角线的方向不同,以形成所谓的交错设置。
承上所述,本实施例的第二轴向感测电极120通过与触控区A的任一侧边呈斜角走向设置,让每一第二轴向感测电极120的接线端120a的布局位置得以与图2A所示之第一轴向感测电极110的接线端110a相同,以布局于触控区A的其中之一对相对侧边上,也就是让第二轴向感测电极120的接线端120a同样也是分别布局于触控区A的上侧边及相对的下侧边。此外,由于触控区A的上侧边及下侧边分别邻接第一周边区P1及第二周边区P2,因此,在所有第二轴向感测电极120中,布局于触控区A的上侧边的接线端120a是邻接第一周边区P1,而布局于触控区A的下侧边的接线端120a是邻接第二周边区P2。
接着,图2B同样仅绘示出触控面板100的导线组中的复数条第三导线122及复数条第四导线126。其中,第三导线122设置于第一周边区P1,用来电性连接第二轴向感测电极120中布局于邻接第一周边区P1的接线端120a;第四导线126设置于第二周边区P2,用来电性连接第二轴向感测电极120中布局于邻接第二周边区P2的接线端120a。
此外,触控面板100更包括设置于第一周边区P1的第三接合垫124及设置于第二周边区P2的第四接合垫128,让前述的第三导线122经由电路布线来与第三接合垫124电性连接,并且让前述的第四导线126经由电路布线来与第四接合垫128电性连接。由于本实施例的第二轴向感测电极120呈斜角走向设置并且其接线端120a仅布局于触控区A的其中之一对侧边上,让第三导线122及第四导线126也就可以仅布线于触控区A的该对相对侧边所邻接的第一周边区P1及第二周边区P2。
本实施例的触控面板100的整体架构请参阅图3,其系由图2A与图2B所组合而成的触控面板100之一实施例示意图。如图3所示,触控面板100的触控电极结构包含相互交错的第一轴向感测电极110及第二轴向感测电极120,并且触控面板100的导线组包含电性连接第一轴向感测电极110的第一导线112及第二导线116及电性连接第二轴向感测电极120的第三导线122及第四导线126。此外,触控面板100更包括一绝缘层102,设置于第一轴向感测电极110与第二轴向感测电极120之间,用以电性隔绝第一轴向感测电极110与第二轴向感测电极120。其中,绝缘层102在设计上不限制为单层或多层的结构,可例如为粘结层、玻璃基板、塑胶薄膜或前述之任意组合。
更具体来讲,触控电极结构中的第一轴向感测电极110与第二轴向感测电极120是对应形成于绝缘层102的两侧来进行斜角交错,使得在设计上不会有电路短路或布线干扰的问题。同理,电性连接于第一轴向感测电极110的第一导线112及第一接合垫114与电性连接于第二轴向感测电极120的第三导线122及第三接合垫124是电性绝缘地相对设置于第一周边区P1;电性连接于第一轴向感测电极110的第二导线116及第二接合垫118与电性连接于第二轴向感测电极120的第四导线126及第四接合垫128则是电性绝缘地相对设置于第二周边区P2。
此外,位于第一周边区P1的第一接合垫114和第三接合垫124可以与第一软性印刷电路板(未绘出)接合,而位于第二周边区P2的第二接合垫118和第四接合垫128则与第二软性印刷电路板(未绘出)接合。藉此当第一软性印刷电路板及第二软性印刷电路板电性连接于外部的信号处理器(未绘示)时,第一轴向感测电极110和第二轴向感测电极120得以通过导线组、第一软性印刷电路板及第二软性印刷电路板来与信号处理器进行信号传递。
除了前述触控区A所邻接的第一周边区P1和第二周边区P2之外,触控区A的另一对相对侧边,例如以图3之示意图所示的俯视视角及设置方位来看,触控区A的左右两侧边还分别邻接第三周边区P3和第四周边区P4。本实施例通过第一轴向感测电极110及第二轴向感测电极120的斜角交错设置以及其接线端110a及120a布局位置设计,使得在第三周边区P3和第四周边区P4内不需设置电性连接至第一轴向感测电极110和第二轴向感测电极120的导线;或者当导线因实际电路布线需要而经过第三周边区P3或第四周边区P4时,由于接线端110a及120a并没有布局于触控区A邻接第三周边区P3或第四周边区P4的侧边上,因此单纯的电路布线不会占用太大的面积。藉此可相对减少第三周边区P3及第四周边区P4的面积。
如此一来,由于触控面板100在设计上需对应设置不透明的边框来遮蔽导线,本实施例针对第三周边区P3和第四周边区P4则可较有弹性地调整边框大小,例如可形成触控区A的左右两侧边窄边框或无边框的触控面板100。进而相较于习知的触控面板,本实施例之触控面板100的可视区范围可以扩大至接近触控面板100的左右两边缘而达到最大化。
附带一提的是,图3之实施例中所绘示的第一轴向感测电极110及第二轴向感测电极120分别为条状电极,然而在实际感测电极的形状设计上并非以此为限。请参阅图4,依据本发明之一实施例绘示的单一的感测电极之示意图。图4之实施例是以图3中沿第一轴向D1排列的一条第一轴向感测电极110来举例说明,第一轴向感测电极110包含复数个第一电极单元110U及复数个电性连接相邻两个第一电极单元110U的第一连接线110C。其中,第一电极单元110U的形状设计是依据不同积体电路的规格要求而定,图4之实施例的电极单元110U的形状是以菱形来设计,另外,在其他实施例中,电极单元110U的形状还可以是方形、雪花状或其他形状。至于图3中沿第二轴向D2排列的第二轴向感测电极120可以对照第一轴向感测电极110而采用相同的设计,每一条第二轴向感测电极120可包含复数个第二电极单元及复数个电性连接相邻两个第二电极单元的第二连接线,在此也就不再加以赘述及绘示于图中。
进一步就制程上来看,前述第一电极单元110U可以与第一连接线110C一起以一体成型的方式形成;此外,也可以先形成第一电极单元110U,然后再形成第一连接线110C;或者先形成第一连接线110C,然后再形成第一电极单元110U,这些并非为本发明所限制。
接下来,进一步说明本发明之触控面板的迭层结构关系,请参阅图5-8,其系沿着图3的剖面线4-4’之触控面板100之各种实施例剖面示意图。为了让实施例可以更清楚地显示迭层关系,在第5-8图中,第一轴向感测电极110与第二轴向感测电极120是以整面的方式绘制,然而,在此技术领域中具有通常知识者当可了解,第一轴向感测电极110与第二轴向感测电极120可以是如上述第2A、2B及4图所示之图案化的电极层。
另外,以下实施例的内容中所称的方位“上”及“下”仅是用来表示相对的位置关系,对于图式而言,方位“上”是较接近使用者之侧,而方位“下”则是较远离使用者之侧。再者,一第一元件形成于一第二元件“上方”、“之上”、“下方”或“之下”可包含实施例中的该第一元件与该第二元件直接接触,或也可包含该第一元件与第二元件之间更有其他额外元件使该第一元件与第二元件无直接接触。
如图5所示,本实施例的触控面板100包含基板101、111及121。其中,基板101是例如为触控面板100的保护盖板(cover lens),基板111及121是分别用来作为第一轴向感测电极110及第二轴向感测电极120的承载基板。藉此在整体架构上,基板111是设置于基板101下方,而基板121是设置于基板111下方,进而第一轴向感测电极110及第二轴向感测电极120是设置于基板101下方,让基板101的上表面是作为使用者操作触控面板100的触碰面。
更具体来看,第一轴向感测电极110是形成在基板111的任一表面上,本实施例的第一轴向感测电极110是例如形成在基板111的上表面。另外,第二轴向感测电极120可形成在基板121的任一表面,本实施例的第二轴向感测电极120是以形成在基板121的上表面来举例说明,若第二轴向感测电极120在设计上是形成于基板121的下表面的话,在第二轴向感测电极120的下方可增加一保护层来防止第二轴向感测电极120受到损坏。
本实施例的触控面板100更包括粘结层103及105。其中,粘结层103设置于基板101及基板111之间,进一步来讲,粘结层103是贴合于基板101的下表面及形成在基板111之上表面的第一轴向感测电极110。此外,粘结层105是设置于基板111及基板121之间,进一步来讲,粘结层105是贴合于基板111的下表面及形成在基板121之上表面的第二轴向感测电极120。
承上所述的迭层结构,本实施例的基板111和粘结层105可作为电性隔绝第一轴向感测电极110与第二轴向感测电极120的绝缘层,并且基板121可作为第二轴向感测电极120的保护层。
请再参阅图6,本实施例的架构大致与图5之实施例的架构相同,差异点在于本实施例的第一轴向感测电极110是形成在基板111的下表面。如此一来,粘结层103实际上是贴合于基板101的下表面及基板111的上表面,而粘结层105则是贴合于形成在基板111之下表面的第一轴向感测电极110及形成在基板121之上表面的第二轴向感测电极120。
承上所述的迭层结构,本实施例的粘结层105可作为电性隔绝第一轴向感测电极110与第二轴向感测电极120的绝缘层,并且基板121可作为第二轴向感测电极120的保护层。
附带一提的是,在图5及图6所示的迭层结构下,若如前述内容所述,当第二轴向感测电极120是形成于基板121的下表面时,整体结构与图5及图6所示的结构的差异点将仅在于粘结层105的相对贴合关系,让粘结层105贴合于基板121的上表面而并非与第二轴向感测电极120贴合,在此也就不再加以绘示及赘述。
请参阅图7,本实施例的触控面板100包括基板101及121。其中,基板101除了是例如为触控面板100的保护盖板之外,更是用来作为第一轴向感测电极110的承载基板。此外,基板121则是用来作为第二轴向感测电极120的承载基板。藉此在整体架构上,第一轴向感测电极110及第二轴向感测电极120是设置于基板101下方,并且基板121是设置于基板101下方。
更具体来看,第一轴向感测电极110可形成在基板101的任一表面,本实施例的第一轴向感测电极110是例如形成在基板101的下表面,让基板101的上表面用来作为使用者操作触控面板100的触碰面。当然,若第一轴向感测电极110是形成在基板101的上表面的话,触控面板100更可设计一硬质涂层(Hard Coating)来形成于第一轴向感测电极110上方,让硬质涂层的上表面作为使用者操作触控面板100的触碰面。此外,第二轴向感测电极120可形成在基板121的任一表面,本实施例的第二轴向感测电极120是例如形成在基板121的上表面。若第二轴向感测电极120是形成在基板121的下表面的话,在第二轴向感测电极120的下方可增加一保护层来防止第二轴向感测电极120直接暴露而受到损坏。
本实施例的触控面板100更包括粘结层103,设置于基板101及基板121之间,进一步来讲,本实施例的粘结层103是贴合于形成在基板101下表面的第一轴向感测电极110及形成在基板121上表面的第二轴向感测电极120。承上所述的迭层结构,本实施例的粘结层103可作为电性隔绝第一轴向感测电极110与第二轴向感测电极120的绝缘层,并且基板121可作为第二轴向感测电极120的保护层。
请参阅图8,本实施例的触控面板100包括基板101及111。其中,基板101例如为触控面板100的保护盖板,基板111则是用来作为第一轴向感测电极110和第二轴向感测电极120的承载基板。藉此在整体架构上,基板111是设置于基板101下方,进而第一轴向感测电极110及第二轴向感测电极120是设置于基板101下方,让基板101的上表面是作为使用者操作触控面板100的触碰面。
更具体来看,第一轴向感测电极110及第二轴向感测电极120是分别形成于基板111的相对的两个表面,例如第一轴向感测电极110是形成在基板111的上表面,而第二轴向感测电极120是形成在基板111的下表面。藉此,本实施例的基板111即是作为第一轴向感测电极110及第二轴向感测电极120的绝缘层。
本实施例的触控面板100更包括粘结层103及保护层107。其中,粘结层103设置于基板101及基板111之间,进一步来讲,本实施例的粘结层103是贴合于基板101的下表面及形成在基板111上表面的第一轴向感测电极110。再者,由于本实施例的第二轴向感测电极120是形成在基板111的下表面,因此保护层107是进一步形成在第二轴向感测电极120下方,用以避免第二轴向感测电极120直接暴露而受到损坏。
在本发明之各种实施例中,第一轴向感测电极110与第二轴向感测电极120的材料可为透明导电材料,例如铟锡氧化物(indium tin oxide;ITO),可以藉由沉积、微影以及蚀刻制程形成第一轴向感测电极110与第二轴向感测电极120的图案。另外,第一导线112、第二导线116、第三导线122、第四导线126、第一接合垫114、第二接合垫118、第三接合垫124以及第四接合垫128的材料可为金属或合金材料,例如银、铜、钼、铝或其组合,可以藉由印刷制程或者可藉由沉积、微影以及蚀刻制程形成这些导线与接合垫。再者,基板101的材料可以是强化的玻璃基板或塑胶基板,并且基板111及121的材料可以是玻璃基板或塑胶薄膜。此外,粘结层103及105可例如为透明光学胶、液态胶。最后,保护层107的材料可以是有机绝缘材料,例如为聚酰亚胺,可以藉由涂布或印刷制程形成保护层107;保护层107的材料也可以是无机绝缘材料,例如为二氧化硅或氮化硅,可以藉由沉积制程形成保护层107。
依据本发明之实施例,经由触控电极结构的感测电极的布局设计,采用斜角交错设置的第一轴向感测电极与第二轴向感测电极,让上述两个轴向感测电极的接线端集中在触控区的其中之一对相对侧边上,可以让分别连接于两个轴向感测电极的导线只需设置在触控区的其中之一对相对侧边所邻接的区域,增加了触控面板在边框设计上的弹性。例如可实现触控面板在触控区的另一对相对侧边为无边框或窄边框之设计,进而使得触控面板的可视区达到最大化。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明保护的范围之内。

Claims (19)

  1. 一种触控电极结构,应用于一触控面板,该触控面板被定义有一矩形的触控区,其特征在于,该触控电极结构包括:
    复数条第一轴向感测电极,沿该触控区的一斜角线平行排列;及
    复数条第二轴向感测电极,沿该触控区的另一斜角线平行排列,并且与该些第一轴向感测电极电性绝缘地形成交错;
    其中该些第一轴向感测电极和该些第二轴向感测电极的一接线端仅布局于该触控区的其中之一对相对侧边。
  2. 如权利要求1所述的触控电极结构,其特征在于,该些第一轴向感测电极及该些第二轴向感测电极形成于一绝缘层的两侧,以通过该绝缘层来电性隔绝。
  3. 如权利要求1所述的触控电极结构,其特征在于,该些第一轴向感测电极及该些第二轴向感测电极分别为一条状电极。
  4. 如权利要求1所述的触控电极结构,其特征在于,每一该些第一轴向感测电极包括复数个第一电极单元及复数个电性连接相邻两个第一电极单元的第一连接线;每一该些第二轴向感测电极包括复数个第二电极单元及复数个电性连接相邻两个第二电极单元的第二连接线。
  5. 一种触控面板,被定义有一矩形的触控区,其特征在于,该触控面板包括:
    如权利要求1所述的触控电极结构;以及
    导线组,电性连接该些第一轴向感测电极的接线端及该些第二轴向感测电极的接线端。
  6. 如权利要求5所述的触控面板,其特征在于,该触控区的该对相对侧边分别邻接一第一周边区及一第二周边区。
  7. 如权利要求6所述的触控面板,其特征在于,该导线组包含复数条第一导线、复数条第二导线、复数条第三导线及复数条第四导线,其中该些第一导线及该些第三导线相互电性绝缘地设置于该第一周边区,该些第二导线及该些第四导线相互电性绝缘地设置于该第二周边区。
  8. 如权利要求7所述的触控面板,其特征在于,该些第一导线电性连接该些第一轴向感测电极中布局于邻接该第一周边区的接线端,且该些第二导线电性连接该些第一轴向感测电极中布局于邻接该第二周边区的接线端。
  9. 如权利要求7所述的触控面板,其特征在于,该些第三导线电性连接该些第二轴向感测电极中布局于邻接该第一周边区的接线端,且该些第四导线电性连接该些第二轴向感测电极中布局于邻接该第二周边区的接线端。
  10. 如权利要求7所述的触控面板,其特征在于,更包括:
    第一接合垫,与该些第一导线电性连接,且设置于该第一周边区;
    第二接合垫,与该些第二导线电性连接,且设置于该第二周边区;
    第三接合垫,与该些第三导线电性连接,且设置于该第一周边区;以及
    第四接合垫,与该些第四导线电性连接,且设置于该第二周边区。
  11. 如权利要求10所述的触控面板,其特征在于,该第一接合垫及该第三接合垫进一步与一第一软性印刷电路板接合;该第二接合垫及该第四接合垫进一步与一第二软性印刷电路板接合。
  12. 如权利要求5所述的触控面板,其特征在于,更包括:
    第一基板,其中该些第一轴向感测电极和该些第二轴向感测电极设置于该第一基板下方。
  13. 如权利要求12所述的触控面板,其特征在于,更包括:
    第二基板,设置于该第一基板下方,其中该些第一轴向感测电极形成于该第二基板的一表面上;以及
    第三基板,设置于该第二基板下方,其中该些第二轴向感测电极形成于该第三基板的一表面上。
  14. 如权利要求13所述的触控面板,其特征在于,更包括:
    第一粘结层,设置于该第一基板与该第二基板之间;以及
    第二粘结层,设置于该第二基板与该第三基板之间。
  15. 如权利要求12所述的触控面板,其特征在于,该些第一轴向感测电极形成于该第一基板的一表面上。
  16. 如权利要求15所述的触控面板,更其特征在于,包括:
    第二基板,设置于该第一基板下方,其中该些第二轴向感测电极形成于该第二基板的一表面上;以及
    粘结层,设置于该第一基板及该第二基板之间。
  17. 如权利要求12所述的触控面板,其特征在于,更包括:
    第二基板,设置于该第一基板下方,其中该些第一轴向感测电极形成于该第二基板的一表面上,该些第二轴向感测电极形成于该第二基板的另一表面上;
    粘结层,设置于该第一基板与该第二基板之间;以及
    保护层,设置于该第二基板下方。
  18. 如权利要求5所述的触控面板,其特征在于,更包括一绝缘层,设置于该些第一轴向感测电极及该些第二轴向感测电极之间,以电性隔绝该些第一轴向感测电极和该些第二轴向感测电极。
  19. 如权利要求18所述的触控面板,其特征在于,该绝缘层包括一粘结层、一玻璃基板、一塑胶薄膜或前述之组合。
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