WO2016065782A1 - 触摸屏及其制作方法和显示装置 - Google Patents

触摸屏及其制作方法和显示装置 Download PDF

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Publication number
WO2016065782A1
WO2016065782A1 PCT/CN2015/073402 CN2015073402W WO2016065782A1 WO 2016065782 A1 WO2016065782 A1 WO 2016065782A1 CN 2015073402 W CN2015073402 W CN 2015073402W WO 2016065782 A1 WO2016065782 A1 WO 2016065782A1
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Prior art keywords
electrode
electrodes
column
sensing
transparent substrate
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PCT/CN2015/073402
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English (en)
French (fr)
Inventor
谢涛峰
张雷
刘洋
吴玲艳
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京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to US14/785,702 priority Critical patent/US9996208B2/en
Publication of WO2016065782A1 publication Critical patent/WO2016065782A1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • 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
    • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B05D2203/35—Glass
    • 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
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • Embodiments of the present invention generally relate to the field of touch display technologies, and in particular, to a touch screen and a method of fabricating the same, and a display device including the display screen.
  • touch technology has been widely used in various multimedia electronic products, especially portable mobile electronic products, such as mobile phones, e-books, tablets, and the like.
  • touch technology as an input means can effectively replace the existing keyboard or mouse input method.
  • the touch input method has become a popular human-computer interaction interface and multimedia interaction.
  • the traditional touch screen includes the outermost protective glass, the middle touch screen and the innermost display, and the One Glass Solution (OGS) directly forms ITO on the outermost protective glass.
  • ITO One Glass Solution
  • Indium tin a technology of conductive film and sensor, that is to say, OGS technology combines the outermost protective glass and touch screen into one screen, which reduces the production cost, improves the product qualification rate, and can better meet the intelligent terminal.
  • the demand for ultra-thinness has improved the display effect. Therefore, OGS technology is increasingly applied to electronic devices such as smart terminals.
  • the touch screen usually includes an active area in the middle and a dummy area in the periphery.
  • the touch electrodes are disposed in the effective area, and the dummy area is mainly used for wiring.
  • the impedance of the ITO wiring used in the prior art is relatively high, and is limited.
  • the number of wirings is limited.
  • a touch screen comprising: a transparent substrate having a surface including a central area and a peripheral area; and an array of electrodes disposed in the central area, disposed on the transparent substrate a plurality of driving electrodes and a plurality of sensing electrodes on the surface are formed; and a plurality of wirings are formed on the surface of the transparent substrate for electrically connecting each electrode in the electrode array to an external touch driving circuit, wherein Each of the electrodes in the electrode array and the plurality of wirings are formed of a single layer of metal formed on the surface of the transparent substrate.
  • each of the electrodes in the electrode array may have a mesh form formed by the intersection of metal traces, and further optionally, the electrode array has a row direction and a column direction, and the driving electrodes and the sensing electrodes may be in the row direction Both the column and the column direction are alternately arranged and spaced apart from each other to form a plurality of columns of electrodes and a plurality of rows of electrodes.
  • each of the adjacent two column electrodes may constitute one electrode column pair, and each electrode column pair corresponds to one of the plurality of wires and one of the plurality of sensing electrode wires, the one drive
  • the electrode wiring may be electrically connected to all of the driving electrode pairs, and each of the plurality of sensing electrode wirings is electrically connected to a corresponding one of the electrode column pairs.
  • each of the driving electrode wirings may be disposed in a column gap region between adjacent two column electrodes of its corresponding one of the electrode column pairs, and the outermost two columns of sensing electrodes in the electrode array Electrically connected sensing electrode wirings are disposed within the peripheral region, and at least a portion of the sensing electrode wiring electrically connected to sensing electrodes other than the outermost two columns of sensing electrodes in the electrode array may be disposed adjacent to each other The column gap region between the two electrode column pairs, and the plurality of wires are collected into the pad region of the peripheral region at one end of the transparent substrate.
  • each of the sensing electrode wirings may extend from its corresponding sensing electrode toward the one end and be collected to the pad region in a first direction parallel to the column direction.
  • the wiring electrically connected to a part of the sensing electrodes of at least one of the plurality of columns of electrodes may extend from the corresponding sensing electrode toward the one end in a first direction parallel to the column direction And concentrating to the pad region, and the wiring electrically connected to the other one of the at least one column of electrodes is in a second direction opposite to the first direction from the corresponding sensing electrode to the transparent substrate and The other end, which is opposite at one end, extends along the peripheral region and collects into the pad region.
  • the touch screen may further include a black matrix formed in the peripheral region, the black matrix being located under the wiring in the peripheral region to avoid viewing from the other surface of the transparent substrate opposite to the surface to be located at the periphery Wiring within the area.
  • a display device including the above touch screen is provided.
  • a method of fabricating a touch screen includes the steps of: providing a transparent substrate having a surface including a central region and a peripheral region; forming on the surface a metal layer; and patterning the metal layer by a patterning process to form a grid-like electrode array in the central region and forming a plurality of wirings in the peripheral region, the electrode array including a plurality of driving electrodes and a plurality of senses A measuring electrode is formed, the plurality of wires being configured to electrically connect each of the electrode arrays to an external touch driving circuit.
  • each electrode in the electrode array may be formed in a grid form; further optionally, in the row direction and the column direction of the electrode array
  • the driving electrodes and the sensing electrodes spaced apart from each other are alternately formed.
  • each of the adjacent two columns of electrodes constitutes one electrode column pair, and the plurality of driving electrode wires and the plurality of sensing electrodes may be formed by the metal layer
  • the wiring, each of the driving electrode wirings is electrically connected to all of the driving electrodes of a corresponding pair of electrode columns, and each of the sensing electrode wirings is electrically connected to a corresponding one of the corresponding one of the pair of electrode columns.
  • each of the driving electrode wirings is formed in a first column gap region between the two column electrodes of the electrode column pair; Forming a sensing electrode wiring arrangement electrically connected to the outermost two columns of sensing electrodes in the electrode array; forming an electrode array in a second column gap region between adjacent two electrode column pairs At least a portion of the sense electrode wiring electrically connected to the sense electrodes other than the outermost two columns of sense electrodes, the second column gap region being spaced apart from the first column of gap regions by a column of electrodes; and at the periphery
  • the plurality of wirings are concentrated in a pad region located at one end of the transparent substrate in the region.
  • each of the sensing electrode wirings may be formed such that it extends from the corresponding sensing electrode toward the one end and is collected to the pad region.
  • the wiring electrically connected to a part of the at least one column of the sensing electrodes may extend from the corresponding sensing electrode toward the one end in the first direction parallel to the column direction and be collected to the pad region, and
  • the wiring electrically connected to the other of the at least one column of electrodes extends in a second direction opposite to the first direction from the corresponding sensing electrode toward the other end of the transparent substrate opposite the one end, along The peripheral regions extend and are collected to the pad region.
  • the above fabrication method may further include the step of forming a black matrix in the peripheral region such that a subsequently formed metal layer is laminated on the black matrix in the peripheral region.
  • the above manufacturing method may further include the step of treating the formed metal layer by a blackening erasing process.
  • the above manufacturing method may further include the step of forming a protective layer covering the electrode array and the plurality of wirings on the surface.
  • FIG. 1 is a plan view of a transparent substrate formed with a black matrix in accordance with an embodiment of the present invention
  • FIG. 2 is a top plan view of a transparent substrate formed with a metal layer in accordance with an embodiment of the present invention
  • FIG. 3 is a plan view showing an electrode and a wiring arrangement of a touch screen according to an embodiment of the present invention
  • Figure 4 is an enlarged schematic view of a portion "A" of Figure 3, showing the structure of an electrode of a touch screen according to an embodiment of the present invention
  • Figure 5 is a cross-sectional view of the "B" portion of the electrode shown in Figure 4.
  • FIG. 6 is a plan view showing an electrode and a wiring arrangement of a touch screen according to another embodiment of the present invention.
  • a touch screen includes: a transparent substrate having a surface including a central region and a peripheral region; and an array of electrodes disposed in the central region, the one disposed on the transparent substrate a plurality of driving electrodes and a plurality of sensing electrodes are formed on the surface; and a plurality of wirings are formed on the surface of the transparent substrate for electrically connecting each electrode in the electrode array to an external touch driving circuit, wherein the electrodes
  • Each of the electrodes in the array and the plurality of wires are formed of a single layer of metal formed on the surface of the transparent substrate.
  • a transparent substrate 10 having a first surface and a second surface opposite the first surface, the first surface including a central region 11 and a peripheral region 12 surrounding the central region 11, as shown in FIG.
  • the transparent substrate 10 includes, for example, a glass substrate whose first surface faces a display screen (not shown) of a display device, and the second surface faces the user and is touched by a user.
  • the peripheral region 12 as at one end (left end in FIG. 1) of the transparent substrate 10, there may be a pad portion or a pad region 13 for connecting or collecting the electrode wiring of the touch screen (in the figure)
  • the dotted line is only shown The meaning of the pad area does not indicate the shape of the actual pad area).
  • a photoresist material is coated on the first surface of the transparent substrate 10, and a black matrix 20 is formed on the first surface by a patterning process such as exposure, development, etc., as shown in FIG. 1, the black matrix 20 is located in the peripheral region 12 Inside, to avoid wiring from the second surface of the transparent substrate to be located in the peripheral region (see FIGS. 3 and 6).
  • a single metal layer 30 is formed on the first surface of the transparent substrate 10, as shown in FIG. 2, the metal layer 30 covers the central region 11 of the transparent substrate 10, and at least partially covers the peripheral region 12 and is formed in the peripheral region 12.
  • the metal layer 30 may be deposited on the entire first surface of the transparent substrate 10 using a semiconductor process such as sputtering, coating, or the like.
  • the material forming the metal layer 30 may include common materials for making electrodes such as copper, silver, molybdenum, aluminum, and the like.
  • the metal layer 30 will be used to form the driving electrodes of the touch screen, the sensing electrodes, and the wiring connecting the electrodes, and thus, the formed metal may be processed by a blackening erasing process.
  • the metal layer 30 is patterned by one patterning process to form a metal pattern 30' (see FIG. 5), including a grid-like electrode array located in the central region and a plurality of wirings located in the peripheral region
  • the electrode array includes a plurality of driving electrodes 31 and a plurality of sensing electrodes 32 for electrically connecting each electrode in the electrode array to an external touch through the pad region.
  • Drive circuit (not shown).
  • the patterning process can employ common semiconductor processes including exposure, development, etching, and the like.
  • a protective layer 40 may be formed on the entire first surface of the transparent substrate 10 to prevent the metal layer from being exposed to cause product quality problems.
  • the driving electrode 31 and/or the sensing electrode 32 of the touch screen may have a crossover of a plurality of metal traces, according to an embodiment of the present invention. Grid structure.
  • the driving electrode 31 and the sensing electrode 32 may have the same or different mesh structures. This can be determined based on the aperture ratio, process, materials, and the like.
  • Figure 5 is a cross-sectional view of the "B" portion of the electrode shown in Figure 4, in which the metal pattern 30' formed on the transparent substrate 10 is covered with a protective layer 40.
  • the electrode array of the touch screen 100 has a row direction X and a column direction Y, and the driving electrodes 31 and the sensing electrodes 32 are alternately arranged and spaced apart from each other in both the row direction X and the column direction Y.
  • each pair of adjacent electrodes includes a driving electrode 31 and a sensing electrode 32 to form a mutual capacitance structure for sensing a human finger or The touch position of other objects on the touch screen.
  • each of the adjacent two column electrodes may be referred to as one electrode column pair, and the six column electrodes in the example illustrated in FIG. 6 constitute three electrode column pairs, and in the example illustrated in FIG. The four column electrodes constitute two electrode column pairs.
  • the number of electrode columns and rows of the electrode array of the touch screen is not limited and can be selected according to product size requirements, process levels, and the like.
  • the plurality of wirings formed by the transparent substrate 10 include a plurality of driving electrode wirings 33 and a plurality of sensing electrode wirings 34.
  • each of the driving electrode wirings 33 may be electrically connected to all of the driving electrode electrodes 31 of its corresponding one of the electrode column pairs, and each of the sensing electrode wirings 34 is electrically connected to the corresponding one of the sensing electrodes 32.
  • each of the driving electrode wires 33 is disposed adjacent to its corresponding one of the electrode column pairs.
  • the sensing electrode wiring 34 electrically connected to the outermost two columns of sensing electrodes in the electrode array is disposed in the peripheral region 12, and is electrically connected to the sensing electrodes other than the outermost two columns of sensing electrodes in the electrode array. At least a portion of the sensing electrode wiring 34 is disposed within the second column gap region 15 between the adjacent two electrode column pairs.
  • All of the electrode wirings 33, 34 of the touch screen 100 extend or are collected into the pad region 13 of the peripheral region 12 at one end of the transparent substrate 10, and portions of all the electrode wirings 33, 34 in the peripheral region 12 are combined with the black matrix 20 Overlapping to avoid seeing metal traces from the second surface of the touch screen (ie, the touch surface).
  • a plurality of pad regions 13 may exist at one end of the transparent substrate 10, and wirings electrically connected to the electrodes in each electrode column pair are collected to the pad regions corresponding to the electrode column pairs. Therefore, the problem of too much or too much lead pin in one pad area can be avoided. Obviously, it is also possible that all the wirings can be collected into one pad area, as the number of electrode wirings of the touch screen allows.
  • each of the sensing electrode wirings 34 is in the first direction (the upward direction in FIG. 6) parallel to the column direction Y.
  • a corresponding sensing electrode 32 extends toward the one end of the substrate 10 and is collected to the pad region 13. This can be applied to the case where the number of wirings is appropriate.
  • the wiring electrically connected to a part of the sensing electrodes 32 of one column of electrodes can be in a first direction parallel to the column direction (at In FIG. 3, the leftward direction extends from the corresponding sensing electrode toward the one end of the substrate 10 and is collected to the pad region 13, and the wiring electrically connected to the other sensing electrodes 32 in the column electrode is first a second direction opposite to the first direction (the leftward direction in FIG. 3) extends from the corresponding sensing electrode toward the other end of the transparent substrate 10 opposite to the one end (the right end in FIG. 3), The one end (the left end in FIG. 3) of the substrate 10 extends along the peripheral region 12 and is collected to the pad region 13.
  • the driving electrodes, the sensing electrodes, and the wirings connecting the electrodes of the touch panel can be simultaneously formed from a single layer of metal directly formed on the transparent substrate, thereby simplifying the manufacturing process and reducing the cost.
  • the wiring length is almost unlimited, and the line width of the metal trace forming the electrode and the wiring can be determined according to the process, the electrode layout, the product requirements, etc., for example, 5um, 3um, 2.5um, Even narrower line widths, which are significantly narrower than existing ITO lines, allow more wiring to be routed in the wiring area to support medium to large size products.
  • the product using the touch screen of the present invention may include a display device, which can realize both a display function and a touch function, such as a liquid crystal display device, such as a liquid crystal panel, a liquid crystal television, a mobile phone, an e-book, a tablet computer, etc.;
  • a display device which can realize both a display function and a touch function, such as a liquid crystal display device, such as a liquid crystal panel, a liquid crystal television, a mobile phone, an e-book, a tablet computer, etc.
  • the display device including the touch panel described in the above embodiments may also be an organic electroluminescence display.

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

Abstract

本发明提供了一种触摸屏，包括：透明基板，该透明基板具有包括中央区域和外围区域的一表面；布置在中央区域内的电极阵列，由设置在透明基板的该表面上的多个驱动电极和多个感测电极形成；和多条布线，形成在透明基板的该表面上，用于将电极阵列中的每个电极电连接至外部的触摸驱动电路，其中电极阵列中的每个电极和所述多条布线由形成在透明基板的该表面上的单层金属形成。本发明还提供了一种触摸屏的制作方法，其由直接形成在透明基板上的单层金属同时形成触摸屏的驱动电极、感测电极以及连接电极的布线。本发明还提供了一种包括该触摸屏的显示装置。

Description

触摸屏及其制作方法和显示装置 技术领域
本发明的实施例一般地涉及触控显示技术领域，并且具体地，涉及一种触摸屏及其制作方法、和包括该显示屏的显示装置。
背景技术
近年来，触控技术被广泛地应用在各种多媒体电子产品中，特别是便携式的移动电子产品中，比如手机、电子书、平板电脑等。使用触控技术作为输入的手段可有效取代现有的键盘或者鼠标的输入方法。除了具备便利性之外，更由于操作的直觉性，触控输入方式这一技术已成为极受欢迎的人机交互界面与多媒体互动方式。
传统的触控屏幕包括最外层的保护玻璃，中间的触摸屏和最内侧的显示屏，而一体化触控屏(One Glass Solution，OGS)是在最外层的保护玻璃上直接形成ITO(氧化铟锡)导电膜及传感器的一种技术，也就是说，OGS技术将最外层的保护玻璃和触摸屏结合成为一个屏，降低了生产成本，提高了产品合格率，能够较好地满足智能终端超薄化的需求，并提升了显示效果，因此，OGS技术越来越多的应用到了智能终端等电子设备上。
触摸屏通常包括中间的有效区和外围的虚设(dummy)区，触控电极设置在有效区内，虚设区主要用于布线，而现有技术中采用的ITO布线的阻抗值较高，在有限的虚设区内，布线的数量被限制。例如，目前IC产品可用的虚设区的宽度值最大为2.1mm，ITO线宽/线距以30um/30um计算，在此区域内布线的数量在36条以内。因此驱动电极(TX)的最大数量为36/2＝18个，产品的最大宽度距离为18*4.5mm＝81mm＝8.1cm，这将产品范围限制在小尺寸。
发明内容
为了克服现有技术存在的上述和其它问题和缺陷中的至少一种，提出了本 发明。
根据本发明的实施例的一个方面，提出了一种触摸屏，包括：透明基板，该透明基板具有包括中央区域和外围区域的一表面；布置在中央区域内的电极阵列，由设置在透明基板的该表面上的多个驱动电极和多个感测电极形成；和多条布线，形成在透明基板的该表面上，用于将电极阵列中的每个电极电连接至外部的触摸驱动电路，其中电极阵列中的每个电极和所述多条布线由形成在透明基板的该表面上的单层金属形成。
在上述触摸屏中，电极阵列中的每个电极可以具有由金属迹线交叉形成的网格形式，进一步可选地，电极阵列具有行方向和列方向，并且驱动电极和感测电极可以在行方向和列方向二者上都被交替地布置并彼此隔开，以形成多列电极和多行电极。
在上述触摸屏中，相邻的每两列电极可以构成一个电极列对，并且每一个电极列对与所述多条布线中的一条驱动电极布线和多条感测电极布线对应，所述一条驱动电极布线可以与所述电极列对中的所有驱动电极电连接，且所述多条感测电极布线中的每条感测电极布线与所述电极列对中对应的一个感测电极电连接。
在上述触摸屏中，每条驱动电极布线的至少一部分可以布置在它对应的一个电极列对的相邻的两列电极之间的列间隙区域内，与电极阵列中最外围的两列感测电极电连接的感测电极布线布置在所述外围区域内，与电极阵列中除最外围的两列感测电极之外的感测电极电连接的感测电极布线的至少一部分可以布置在相邻的两个电极列对之间的列间隙区域内，并且所述多条布线都汇集到所述外围区域中位于透明基板的一端的焊盘区域内。
在上述触摸屏中，每条感测电极布线可以都在与列方向平行的第一方向上从它对应的感测电极向所述一端延伸并汇集至焊盘区域。
作为替换，与所述多列电极中的至少一列电极中的一部分感测电极电连接的布线可以在与列方向平行的第一方向上从对应的感测电极向所述一端延伸 并汇集至焊盘区域，并且与所述至少一列电极中的其它感测电极电连接的布线在与第一方向相反的第二方向上从对应的感测电极向所述透明基板的与所述一端相反的另一端延伸，沿着所述外围区域延伸并汇集至焊盘区域。
上述触摸屏还可以包括形成在所述外围区域内的黑矩阵，该黑矩阵位于所述外围区域内的布线下，以避免从透明基板的与所述表面相反的另一表面观看到位于所述外围区域内的布线。
根据本发明的实施例的另一个方面，提供了一种包括上述触摸屏的显示装置。
根据本发明的实施例的又一个方面，提供了一种触摸屏的制作方法，包括下述步骤：提供一透明基板，该透明基板具有包括中央区域和外围区域的一表面；在所述表面上形成一金属层；以及通过一次构图工艺对金属层进行图案化，以在中央区域内形成网格状的电极阵列并在外围区域内形成多条布线，该电极阵列包括多个驱动电极和多个感测电极形成，所述多条布线被配置成用于将电极阵列中的每个电极电连接至外部的触摸驱动电路。
在制作方法中，通过一次构图工艺对金属层进行图案化的步骤中，可以将电极阵列中的每个电极形成为网格形式；进一步可选地，可以在电极阵列的行方向和列方向二者上交替地形成彼此隔开的驱动电极和感测电极。
在制作方法中，通过一次构图工艺对金属层进行图案化的步骤中，相邻的每两列电极构成一个电极列对，可以由所述金属层形成多条驱动电极布线和多条感测电极布线，每条驱动电极布线与一个对应的电极列对中的所有驱动电极电连接，且每条感测电极布线与一个对应的电极列对中对应的一个感测电极电连接。
在制作方法中，通过一次构图工艺对金属层进行图案化的步骤中，在电极列对的两列电极之间的第一列间隙区域内形成每条驱动电极布线的至少一部分；在所述外围区域内形成与电极阵列中最外围的两列感测电极电连接的感测电极布线布置；在相邻的两个电极列对之间的第二列间隙区域内形成与电极阵 列中除最外围的两列感测电极之外的感测电极电连接的感测电极布线的至少一部分，该第二列间隙区域与第一列间隙区域隔开一列电极；以及在所述外围区域中位于透明基板的一端的焊盘区域内汇聚所述多条布线。
在制作方法中，通过一次构图工艺对金属层进行图案化的步骤中，可以将每条感测电极布线形成为使得它从对应的感测电极向所述一端延伸并汇集至焊盘区域。
根据上述制作方法，与至少一列电极中的一部分感测电极电连接的布线可以在与列方向平行的第一方向上从对应的感测电极向所述一端延伸并汇集至焊盘区域，并且与所述至少一列电极中的其它感测电极电连接的布线在与第一方向相反的第二方向上从对应的感测电极向所述透明基板的与所述一端相反的另一端延伸，沿着所述外围区域延伸并汇集至焊盘区域。
在所述表面上形成金属层的步骤之前，上述制作方法还可以包括在所述外围区域内形成一黑矩阵的步骤，使得在外围区域内后续形成的金属层层叠在黑矩阵上。
上述制作方法还可以包括采用黑化消影工艺处理所形成的金属层的步骤。
上述制作方法还可以包括在所述表面上形成覆盖电极阵列和所述多条布线的保护层的步骤。
通过下文中参照附图对本发明所作的详细描述，本发明的其它目的和优点将显而易见，并可帮助对本发明有全面的理解。
附图说明
通过参考附图能够更加清楚地理解本发明的特征和优点，附图是示意性的而不应理解为对本发明进行任何限制，在附图中：
图1是根据本发明的实施例的形成有黑矩阵的透明基板的俯视图；
图2是根据本发明的实施例的形成有金属层的透明基板的俯视图；
图3是示出根据本发明的一个实施例的触摸屏的电极和布线布置的俯视图；
图4是图3中的“A”部分的放大示意图，示出根据本发明的一个实施例的触摸屏的电极的结构；
图5是图4中示出的电极的“B”部分的剖视图；以及
图6是示出根据本发明的另一个实施例的触摸屏的电极和布线布置的俯视图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。
另外，在下面的详细描述中，为便于说明，阐述了许多具体的细节以提供对本发明的实施例的全面理解。然而明显地，一个或多个实施例在没有这些具体细节的情况下也可以被实施。在其它情况下，公知的结构和装置以图示的方式体现以简化附图。
根据本发明的一个总的构思，提供了一种触摸屏，包括：透明基板，该透明基板具有包括中央区域和外围区域的一表面；布置在中央区域内的电极阵列，由设置在透明基板的该表面上的多个驱动电极和多个感测电极形成；和多条布线，形成在透明基板的该表面上，用于将电极阵列中的每个电极电连接至外部的触摸驱动电路，其中电极阵列中的每个电极和所述多条布线由形成在透明基板的该表面上的单层金属形成。
图1-3示出了根据本发明的一个示例性实施例的用于制作用在显示装置中的触摸屏的方法。首先，提供一透明基板10，该透明基板具有第一表面和与第一表面相反的第二表面，第一表面包括中央区域11和围绕中央区域11的外围区域12，如图1所示。透明基板10例如包括玻璃基板，其第一表面面向显示显示装置的显示屏(未示出)，而第二表面面向用户并由用户触摸。如下文将描述的那样，在外围区域12内，如在透明基板10的一端(图1中的左端)可以具有用于连接或汇集触摸屏的电极布线的焊盘部或焊盘区域13(图中虚线仅是示 意性的表示焊盘区域，并不表示实际焊盘区域的形状)。
接着，在透明基板10的第一表面上上涂布光阻材料，并利用曝光、显影等构图工艺在第一表面上形成黑矩阵20，如图1所示，该黑矩阵20位于外围区域12内，以避免从透明基板的第二表面观看到位于外围区域内的布线(如参见图3和6)。
接下来，在透明基板10的第一表面上形成单个金属层30，如图2所示，金属层30覆盖透明基板10的中央区域11，并至少部分地覆盖外围区域12和形成在外围区域12内的黑矩阵20。在一个示例中，可以采用溅镀、涂布等半导体工艺在透明基板10的整个第一表面上沉积金属层30。形成金属层30的材料可以包括用于制作电极的常见材料，如铜、银、钼、铝等。
在本发明的实施例中，如下文将描述的那样，金属层30将用于形成触摸屏的驱动电极、感测电极以及连接电极的布线，因此，可以采用黑化消影工艺处理所形成的金属层30，以减少金属层的反光，使人眼较难看到所形成的电极和/或布线的迹线。
然后，通过一次构图工艺对金属层30进行图案化，以形成金属图案30’(参见图5所示)，包括位于中央区域内的成网格状的电极阵列和位于外围区域内的多条布线，如图3所示，该电极阵列包括多个驱动电极31和多个感测电极32形成，所述多条布线用于通过焊盘区域将电极阵列中的每个电极电连接至外部的触摸驱动电路(未示出)。构图工艺可以采用常见的半导体工艺，包括曝光、显影、刻蚀等。
在一个示例中，在形成触摸屏的电极和布线之后，可以在透明基板10的整个第一表面上形成一保护层40(参见图5)，以防止金属层裸露造成产品质量问题。
图4是图3中的“A”部分的放大示意图，如图所示，根据本发明的一个实施例，触摸屏的驱动电极31和/或感测电极32可以具有由多条金属迹线交叉构成的网格结构。驱动电极31和感测电极32可以具有相同或不同的网格结构， 这可以根据开口率、工艺、材料等要求进行确定。
图5是图4中示出的电极的“B”部分的剖视图，其中在透明基板10上形成金属图案30’上覆盖有保护层40。
以下将参照图3和6描述本发明的触摸屏的结构。如图6所示，触摸屏100的电极阵列具有行方向X和列方向Y，并且驱动电极31和感测电极32在行方向X和列方向Y二者上都被交替地布置并彼此隔开，以形成多列电极和多行电极。如图所示，在行方向X上和在列方向Y上，每对相邻的电极都包括一个驱动电极31和一个感测电极32，从而形成一个互电容结构，以感测人的手指或其它物体在触摸屏上的触摸位置。
在此，可以将相邻的每两列电极称之为一个电极列对，在图6中图示的示例中的6列电极构成3个电极列对，而图6中图示的示例中的4列电极构成2个电极列对。明显地，触摸屏的电极阵列的电极列和行的数量不受限制，并且可以根据产品尺寸需求、工艺水平等来选择。
如图6所示，透明基板10形成的多条布线包括多条驱动电极布线33和多条感测电极布线34。根据一个示例，每条驱动电极布线33可以与它对应的一个电极列对中的所有驱动电极31电连接，而每条感测电极布线34与对应的一个感测电极32电连接。
如图3和6所示，电极阵列中的相邻两列电极之间存在列间隙区域14、15，每条驱动电极布线33的至少一部分布置在它对应的一个电极列对的相邻的两列电极之间的第一列间隙区域14内。与电极阵列中最外围的两列感测电极电连接的感测电极布线34布置在外围区域12内，而与电极阵列中除最外围的两列感测电极之外的感测电极电连接的感测电极布线34的至少一部分布置在相邻的两个电极列对之间的第二列间隙区域15内。触摸屏100的所有电极布线33、34都延伸或汇集到外围区域12中位于透明基板10的一端的焊盘区域13内，并且所有电极布线33、34在外围区域12内的部分都与黑矩阵20重叠，从而避免从触摸屏的第二表面(即，触摸表面)看到金属迹线。
在图3和6的示例中，在透明基板10的一端可以存在多个焊盘区域13，与每个电极列对中的电极电连接的布线都汇集到与该电极列对对应的焊盘区域，从而可以避免一个焊盘区域内的引线脚过多或过于集中的问题。显然，在触摸屏的电极布线的数量允许的情况下，所有的布线可以都汇集到一个焊盘区域也是可行的。
在图6示出的示例中，可以采用单端布线的方式，即，每条感测电极布线34都在与列方向Y平行的第一方向(在图6中是向上的方向)上从它对应的感测电极32向基板10的所述一端延伸并汇集至焊盘区域13。这可以适用于布线数量适当的情况。
而在布线数量较多的情况下，可以采用双端布线的方式，如图3所示，与一列电极中的一部分感测电极32电连接的布线可以在与列方向平行的第一方向(在图3中是向左的方向)上从对应的感测电极向基板10的所述一端延伸并汇集至焊盘区域13，而与该列电极中的其它感测电极32电连接的布线首先在与第一方向相反的第二方向(在图3中是向左的方向)上从对应的感测电极向透明基板10的与所述一端相反的另一端(在图3中是右端)延伸，沿着外围区域12向基板10的所述一端(在图3中是左端)延伸并汇集至焊盘区域13。
由此，可以由直接形成在透明基板上的单层金属同时形成触摸屏的驱动电极、感测电极以及连接电极的布线，从而能够简化制作工艺，降低成本。并且由于金属阻抗明显低于ITO，布线长度几乎不受限制，而形成电极和布线的金属迹线的线宽可以根据工艺、电极布局、产品需求等确定，例如可以为5um、3um、2.5um、甚至更窄线宽，这明显比现有的ITO线宽窄，可以在布线区域内铺设更多的布线，以支持中大尺寸产品。
采用本发明的触摸屏的产品可以包括显示装置，其既可以实现显示功能，也可以实现触摸功能，如液晶显示装置，例如液晶面板、液晶电视、手机、电子书、平板电脑等；除了液晶显示装置，包括上述实施例中所述的触摸屏的显示装置也可以是有机电致发光显示器。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行变化，本发明的范围由所附权利要求及其等同物限定。

Claims (19)

  1. 一种触摸屏，包括：
    透明基板，该透明基板具有包括中央区域和外围区域的一表面；
    布置在中央区域内的电极阵列，由设置在透明基板的该表面上的多个驱动电极和多个感测电极形成；和
    多条布线，形成在透明基板的该表面上，用于将电极阵列中的每个电极电连接至外部的触摸驱动电路，
    其中电极阵列中的每个电极和所述多条布线由形成在透明基板的该表面上的单层金属形成。
  2. 根据权利要求1所述的触摸屏，其中
    电极阵列中的每个电极具有网格形式。
  3. 根据权利要求1或2所述的触摸屏，其中
    电极阵列具有行方向和列方向，并且
    驱动电极和感测电极在行方向和列方向二者上都被交替地布置并彼此隔开，以形成多列电极和多行电极。
  4. 根据权利要求3所述的触摸屏，其中
    相邻的每两列电极构成一个电极列对，并且
    每一个电极列对与所述多条布线中的一条驱动电极布线和多条感测电极布线对应，所述一条驱动电极布线与所述电极列对中的所有驱动电极电连接，且所述多条感测电极布线中的每条感测电极布线与所述电极列对中对应的一个感测电极电连接。
  5. 根据权利要求4所述的触摸屏，其中
    每条驱动电极布线的至少一部分布置在它对应的一个电极列对的相邻的两列电极之间的列间隙区域内，
    与电极阵列中最外围的两列感测电极电连接的感测电极布线布置在所述 外围区域内，
    与电极阵列中除最外围的两列感测电极之外的感测电极电连接的感测电极布线的至少一部分布置在相邻的两个电极列对之间的列间隙区域内，并且
    所述多条布线都汇集到所述外围区域中位于透明基板的一端的焊盘区域内。
  6. 根据权利要求5所述的触摸屏，其中
    每条感测电极布线都在与列方向平行的第一方向上从它对应的感测电极向所述一端延伸并汇集至焊盘区域。
  7. 根据权利要求5所述的触摸屏，其中
    与所述多列电极中的至少一列电极中的一部分感测电极电连接的布线在与列方向平行的第一方向上从对应的感测电极向所述一端延伸并汇集至焊盘区域，并且
    与所述至少一列电极中的其它感测电极电连接的布线在与第一方向相反的第二方向上从对应的感测电极向所述透明基板的与所述一端相反的另一端延伸，然后沿着所述外围区域延伸并汇集至焊盘区域。
  8. 根据权利要求1-7中任一项所述的触摸屏，还包括：
    形成在所述外围区域内的黑矩阵，该黑矩阵位于所述外围区域内的布线下，以避免从透明基板的与所述表面相反的另一表面观看到位于所述外围区域内的布线。
  9. 一种显示装置，包括权利要求1-8中任一项所述的触摸屏。
  10. 一种触摸屏的制作方法，包括下述步骤：
    提供一透明基板，该透明基板具有包括中央区域和外围区域的一表面；
    在所述表面上形成一金属层；以及
    通过一次构图工艺对金属层进行图案化，以在中央区域内形成网格状的电极阵列并在外围区域内形成多条布线，该电极阵列包括多个驱动电极和多个感测电极形成，所述多条布线被配置成用于将电极阵列中的每个电极电连接至外 部的触摸驱动电路。
  11. 根据权利要求10所述的制作方法，其中
    通过一次构图工艺对金属层进行图案化的步骤中，将电极阵列中的每个电极形成为网格形式。
  12. 根据权利要求11所述的制作方法，其中
    通过一次构图工艺对金属层进行图案化的步骤中，在电极阵列的行方向和列方向二者上交替地形成彼此隔开的驱动电极和感测电极。
  13. 根据权利要求12所述的制作方法，其中
    通过一次构图工艺对金属层进行图案化的步骤中，相邻的每两列电极构成一个电极列对，由所述金属层形成多条驱动电极布线和多条感测电极布线，每条驱动电极布线与一个对应的电极列对中的所有驱动电极电连接，且每条感测电极布线与一个对应的电极列对中对应的一个感测电极电连接。
  14. 根据权利要求13所述的制作方法，其中
    通过一次构图工艺对金属层进行图案化的步骤中：
    在电极列对的两列电极之间的第一列间隙区域内形成每条驱动电极布线的至少一部分；
    在所述外围区域内形成与电极阵列中最外围的两列感测电极电连接的感测电极布线布置；
    在相邻的两个电极列对之间的第二列间隙区域内形成与电极阵列中除最外围的两列感测电极之外的感测电极电连接的感测电极布线的至少一部分，该第二列间隙区域与第一列间隙区域隔开一列电极；以及
    在所述外围区域中位于透明基板的一端的焊盘区域内汇聚所述多条布线。
  15. 根据权利要求14所述的制作方法，其中
    通过一次构图工艺对金属层进行图案化的步骤中，将每条感测电极布线形成为使得它从对应的感测电极向所述一端延伸并汇集至焊盘区域。
  16. 根据权利要求14所述的制作方法，其中
    与至少一列电极中的一部分感测电极电连接的布线在与列方向平行的第一方向上从对应的感测电极向所述一端延伸并汇集至焊盘区域，并且
    与所述至少一列电极中的其它感测电极电连接的布线在与第一方向相反的第二方向上从对应的感测电极向所述透明基板的与所述一端相反的另一端延伸，沿着所述外围区域延伸并汇集至焊盘区域。
  17. 根据权利要求10-16中任一项所述的制作方法，其中
    在所述表面上形成金属层的步骤之前，该制作方法还包括在所述外围区域内形成一黑矩阵，使得在外围区域内后续形成的金属层层叠在黑矩阵上。
  18. 根据权利要求10-16中任一项所述的制作方法，还包括步骤：
    采用黑化消影工艺处理所形成的金属层。
  19. 根据权利要求10-16中任一项所述的制作方法，还包括步骤：
    在所述表面上形成覆盖电极阵列和所述多条布线的保护层。
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