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WO2016086648A1 - 触摸屏及其制作方法及显示装置 - Google Patents

触摸屏及其制作方法及显示装置 Download PDF

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Publication number
WO2016086648A1
WO2016086648A1 PCT/CN2015/081987 CN2015081987W WO2016086648A1 WO 2016086648 A1 WO2016086648 A1 WO 2016086648A1 CN 2015081987 W CN2015081987 W CN 2015081987W WO 2016086648 A1 WO2016086648 A1 WO 2016086648A1
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WO
WIPO (PCT)
Prior art keywords
sensing layer
metal
touch screen
sensing
lines
Prior art date
Application number
PCT/CN2015/081987
Other languages
English (en)
French (fr)
Inventor
谢晓冬
胡明
罗鸿强
张明
丁贤林
Original Assignee
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 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 filed Critical 京东方科技集团股份有限公司
Priority to US14/786,358 priority Critical patent/US10139965B2/en
Publication of WO2016086648A1 publication Critical patent/WO2016086648A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, 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
    • 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
    • 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
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; 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 relate to a touch screen, a manufacturing method thereof, and a display device.
  • metal grids As touch drive lines and sense lines is widely used. Compared with indium tin oxide, metal grids have become a research hotspot for those skilled in the art with their faster signal transmission speed. However, metal grids are used in touch screens, and there are many problems, especially the most difficult to solve with moiré problems.
  • the moiré problem is usually solved by lowering the line width of the metal lines.
  • reducing the line width of the metal wire causes an increase in the manufacturing process difficulty and the manufacturing cost, and the metal wire width is lowered to a very low level, which is liable to cause metal wire breakage and poor antistatic breakdown capability.
  • the embodiment of the invention provides a touch screen, a manufacturing method thereof and a display device, which can solve the problem of moiré without causing difficulty in manufacturing process and production cost, metal wire breakage and poor antistatic breakdown capability.
  • An embodiment of the invention provides a touch screen, including:
  • the first sensing layer includes a plurality of first sensing lines, and each of the first sensing lines is formed by alternately connecting the first transparent electrodes and the first metal lines in series;
  • the second sensing layer includes a plurality of rows of second sensing lines, and each of the second sensing lines is formed by alternately connecting the second transparent electrode and the second metal line ;
  • the first transparent layer of the first sensing layer and the second transparent electrode of the second sensing layer are in a vertical projection of the first sensing layer and the second sensing layer on a plane of the touch screen Alternatingly arranged in the column direction and the row direction, the first metal line of the first sensing layer and the second metal line of the second sensing layer are alternately arranged in the column direction and the row direction, and the first A first metal line of the sensing layer spans the second transparent electrode of the second sensing layer, and a second metal line of the second sensing layer spans the first transparent electrode of the first sensing layer.
  • the widths of the first metal line and the second metal line are both 5 ⁇ m ⁇ 8 ⁇ m.
  • an intermediate portion of the first metal line has a first metal electrode, and the first metal line is electrically connected to the first metal electrode.
  • the first metal electrode is a metal electrode line perpendicular to a direction in which the first metal wire extends;
  • the first metal electrode is a diamond frame composed of metal electrode lines
  • the first metal electrode is a circular frame composed of metal electrode lines.
  • an intermediate portion of the second metal line has a second metal electrode, and the second metal line is electrically connected to the second metal electrode.
  • the second metal electrode is a metal electrode line perpendicular to a direction in which the second metal line extends;
  • the second metal electrode is a diamond frame composed of metal electrode lines
  • the second metal electrode is a circular frame composed of metal electrode lines.
  • the touch screen further includes:
  • the first sensing layer and the second sensing layer are stacked on the substrate;
  • the touch screen further includes an insulating layer between the first sensing layer and the second sensing layer.
  • the embodiment of the present invention further provides a method for manufacturing a touch screen, which is used for making the touch screen according to any one of claims 1 to 8, the manufacturing method comprising:
  • the first sensing layer includes a plurality of columns of first sensing lines, and each of the first sensing lines is formed by alternately connecting the first transparent electrodes and the first metal lines in series;
  • the second sensing layer is stacked on the first sensing layer, the second sensing layer includes a plurality of rows of second sensing lines, and each of the second sensing lines is Forming a second transparent electrode and a second metal line alternately in series; in a vertical projection of the first sensing layer and the second sensing layer on a plane of the touch screen, a first transparent electrode of the first sensing layer and The second transparent electrodes of the second sensing layer are alternately arranged along the column direction and the row direction, and the first metal lines of the first sensing layer and the second metal lines of the second sensing layer are arranged along the column direction and the row. The directions are alternately arranged, and the The first metal line of the first sensing layer spans the second transparent electrode of the second sensing layer, and the second metal line of the second sensing layer spans the first transparent electrode of the first sensing layer.
  • the forming the first sensing layer on the substrate comprises:
  • the first transparent electrode of the first sensing layer and the first metal line of the first sensing layer are formed in a non-sequential order.
  • the forming the second sensing layer on the substrate comprises:
  • the second transparent electrode of the second sensing layer and the second metal line of the second sensing layer are formed in a non-sequential order.
  • the method before forming the first sensing layer and the second sensing layer, the method further includes: forming a pattern including a black matrix on the substrate by using a photolithography process, wherein the black matrix A vertical projection onto the plane of the touch screen encompasses a vertical projection of the first metal line and the second metal line on the plane of the touch screen.
  • the method of fabricating the touch screen further includes the step of forming an insulating layer, wherein the insulating layer is located between the first sensing layer and the second sensing layer.
  • An embodiment of the present invention further provides a display device, including any of the touch screens described above.
  • FIG. 1 is a schematic plan view of a touch screen according to an embodiment of the present invention.
  • Figure 2 is an enlarged schematic view of the A-A section of Figure 1;
  • Figure 3 is an enlarged schematic view of a section B-B of Figure 1;
  • FIG. 4 is a schematic plan view of a metal line of a touch screen according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a touch screen of a metal electrode having a first structure according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a touch screen of a metal electrode having a second structure according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a touch screen of a metal electrode having a third structure according to an embodiment of the present invention.
  • FIG. 8 is an enlarged schematic diagram of an A-A cross section in the case where a black matrix is set on the touch screen of FIG. 1 according to an embodiment of the present invention
  • FIG. 9 is an enlarged schematic diagram of a B-B cross section in the case where a black matrix is set on the touch screen of FIG. 1 according to an embodiment of the present invention.
  • the embodiment of the present invention provides a touch screen, as shown in FIG. 1 to FIG. 4, comprising: a first sensing layer 10, the first sensing layer 10 includes a plurality of first sensing lines 12, and each of the first sensing lines 12 is first.
  • the transparent electrode 1 and the first metal wire 2 are alternately connected in series;
  • the second sensing layer 11 is stacked on the first sensing layer 10, and the second sensing layer 11 includes a plurality of rows of second sensing lines 34, and each of the second sensing lines 34 is composed of The second transparent electrode 3 and the second metal line 4 are alternately connected in series; wherein, in the vertical projection of the first sensing layer 10 and the second sensing layer 11 on the plane of the touch screen, the first transparent electrode 1 of the first sensing layer and The second transparent electrode 3 of the second sensing layer is alternately arranged in the column direction and the row direction, and the first metal line 2 of the first sensing layer and the second metal line 4 of the second sensing layer are alternately arranged in the column direction and the row direction.
  • each of the first sensing lines includes a plurality of first transparent electrodes 1 and a plurality of first metal lines 2, and each of the second sensing lines includes a plurality of second lines.
  • the touch screen provided by the embodiment of the present invention, between the first metal line 2 of the first sensing layer and the second transparent electrode 3 of the second sensing layer, the first transparent electrode 1 and the first sensing layer of the first sensing layer during touch sensing
  • the mutual capacitance is generated between the second metal wires 4 of the two sensing layers to realize touch.
  • the sensing line of the touch screen sensing layer by changing the sensing line of the touch screen sensing layer from the entire metal line to the structure in which the metal line and the transparent electrode are alternately connected in series, the density of the metal line is significantly reduced, and the metal lines are spaced and irregularly arranged. Ways to eliminate the appearance of moiré.
  • the method for eliminating the moiré in the embodiment of the present invention is that the transparent electrode and the metal line are spaced apart, the line width of the metal line is not required to eliminate the moiré, so that the manufacturing difficulty and the manufacturing cost of the metal line are low, and Ensure sufficient strength, not easy to break, and not easily penetrated by static electricity.
  • the metal line comprises a first metal line 2 and/or a second metal line 4, and the transparent electrode comprises a first transparent electrode 1 and/or a second transparent electrode 3.
  • 4 is a pattern of only remaining metal lines after the touch screen hides the transparent electrode, and the lateral metal lines are in different layers from the vertical metal lines. It can be seen from this figure that after the introduction of the first transparent electrode 1 and the second transparent electrode 3, the density of the first metal line 2 and the second metal line 4 is significantly reduced, and the first metal line 2 and the second metal line are reduced. 4 is the arrangement of the intervals.
  • the width of the metal wire of the embodiment of the present invention may be 5 ⁇ m to 8 ⁇ m, which ensures that the metal wire has sufficient strength to avoid breakage and electrostatic breakdown.
  • the embodiment of the present invention is equivalent to replacing a part of the metal line with a transparent electrode with respect to the mode of the simple metal mesh. Since the transparent electrode has a good optical transmittance, the introduction of the transparent electrode in the embodiment can also increase the optical transmittance of the touch screen.
  • the design of the embodiment can increase the signal transmission speed and reduce the capacitance delay (RC Delay) value, thereby increasing the touch sensitivity of the touch screen.
  • RC Delay capacitance delay
  • the first sensing layer (or the second sensing layer) may be a layer close to the substrate or a layer away from the substrate.
  • the first sensing layer is used as a layer close to the substrate, and the second sensing layer is used.
  • the layer which is away from the substrate will be described as an example.
  • the intermediate portion of the first metal wire 2 may have a first metal electrode 5 and a second metal
  • the intermediate portion of the wire 4 may have a second metal electrode 6 , and the first metal wire 2 is electrically connected to the first metal electrode 5 , and the second metal wire 4 is electrically connected to the second metal electrode 6 .
  • the first metal electrode 5 can increase the area of mutual capacitance between the first metal line 2 and the second transparent electrode 3 of different layers
  • the second metal electrode 6 can increase the first transparentness of the second metal line 4 and different layers
  • the area of the mutual capacitance between the electrodes 1 increases the mutual capacitance and increases the sensitivity of the touch screen.
  • the first metal electrode 5 may be a metal electrode line perpendicular to the extending direction of the first metal line
  • the second metal electrode 6 may be a metal electrode line perpendicular to the extending direction of the second metal line
  • the length is defined as a length that is only electrically connected to a metal line that intersects itself, and is not electrically connected to other metal lines. For example, it may be such that its length does not exceed the length of the transparent electrode corresponding to itself.
  • a metal electrode line perpendicular to the extending direction of the first metal line 2 on the first metal line 2
  • a pattern of a cross is formed with the first metal line 2
  • a pattern perpendicular to the second metal line is disposed on the second metal line 4.
  • the metal electrode line extending in the direction of the metal electrode 4 forms a cross pattern with the second metal line 4, which can increase the mutual capacitance between the first sensing layer and the second sensing layer, thereby further increasing the sensitivity of the touch.
  • the first metal electrode and the second metal electrode may be diamond-shaped frames formed of metal electrode lines to increase mutual capacitance.
  • the first metal electrode and the second metal electrode may be circular frames composed of metal electrode lines to increase mutual capacitance.
  • first metal electrode and the second metal electrode may also be any other shape of the pattern, as long as it can increase the relative area between the upper and lower plates, increase the mutual capacitance, and further increase the sensitivity of the touch. Just fine.
  • the first transparent electrode 1 and the second transparent electrode 3 are generally Indium Tin Oxide (ITO).
  • the touch screen further includes: a substrate 100, the first sensing layer and the second sensing layer are stacked on the substrate 100; and between the substrate 100 and one of the first sensing layer and the second sensing layer being closer to the substrate 100.
  • a black matrix (BM) 21 the vertical projection of the black matrix onto the plane of the touch screen covers the vertical projection of the first metal line and the second metal line on the plane of the touch screen, so that the black matrix can be used to block the metal line. Prevent light leakage at the metal lines.
  • a flat layer or insulating layer 22 may be disposed between one of the first sensing layer and the second sensing layer closer to the substrate 100 and the black matrix 21.
  • the touch screen may further include: an insulating layer 200 between the first sensing layer and the second sensing layer,
  • the insulating layer 200 can be formed of an optical adhesive (OC) for forming an insulating layer between the first sensing layer and the second sensing layer.
  • OC optical adhesive
  • the embodiment of the invention provides a method for manufacturing a touch screen, which is used for manufacturing the touch screen provided above, and the manufacturing method includes:
  • the first sensing layer includes a plurality of first sensing lines, and each of the first sensing lines is formed by alternately connecting the first transparent electrode 1 and the first metal line 2 in series;
  • the second sensing layer is stacked with the first sensing layer, the second sensing layer includes a plurality of rows of second sensing lines, and each of the second sensing lines is formed by the second transparent electrode 3 and the second metal line 4 alternately formed in series; in the vertical projection of the first sensing layer and the second sensing layer on the plane of the touch screen, the first transparent electrode 1 of the first sensing layer and the second transparent electrode 3 of the second sensing layer are in the column direction and The row directions are alternately arranged, and the first metal line 2 of the first sensing layer and the second metal line 4 of the second sensing layer are alternately arranged in the column direction and the row direction, and the first metal line 2 of the first sensing layer A second transparent electrode 3 spanning the second sensing layer, the second metal line 4 of the second sensing layer spanning the first transparent electrode 1 of the first sensing layer.
  • the manufacturing method of the touch screen is changed from a whole metal wire to a metal wire and a transparent electrode alternately connected in series (the first transparent electrode and the first metal wire are alternately connected in series, and the second transparent electrode and the second metal wire are alternately connected in series)
  • the structure is such that the density of the metal wires (the first metal wire and the second metal wire) is significantly reduced, and the metal wires (the first metal wire and the second metal wire) are arranged in a spaced, irregular manner, thereby eliminating moiré appear.
  • the transparent electrode and the metal wire are connected at intervals (the adjacent two first transparent electrodes are connected by the first metal wire, and the adjacent two second transparent electrodes are connected by the second metal wire) to eliminate moiré, without reducing
  • the line width of the metal wire eliminates the moiré, making the metal wire difficult to manufacture and the manufacturing cost, and ensuring that the metal wire has sufficient strength, is not easily broken, and is not easily broken by static electricity.
  • forming the first sensing layer on the substrate 100 includes: forming a pattern of the first transparent electrode 1 including the first sensing layer by a photolithography process; forming a pattern of the first metal line 2 including the first sensing layer by a photolithography process; wherein, the formation of the first transparent electrode 1 of the first sensing layer and the first metal line 2 of the first sensing layer is in no particular order.
  • the photolithography process includes a process of coating, exposing, developing, etching, cleaning, and the like.
  • Forming the second sensing layer on the substrate 100 includes: forming a pattern of the second transparent electrode 3 including the second sensing layer by a photolithography process; forming a second metal line including the second sensing layer by a photolithography process a pattern of 4; wherein the formation of the second transparent electrode 3 of the second sensing layer and the second metal line 4 of the second sensing layer is in no particular order.
  • the fabricated metal wire can adopt a larger line width, the requirements for mask precision, alignment accuracy, and etching precision are reduced during exposure, development, and etching of the photolithography, so the first sensing layer And the production of the second sensing layer is less difficult.
  • the internal structures of the first and second sensing layers are oriented exactly perpendicularly. Therefore, in the exposure developing process, the first sensing layer and the second sensing layer can be formed by using the same mask. For example, if the first sensing layer is formed before the second sensing layer, when the second sensing layer is formed, the mask of the first sensing layer can be rotated by 90 degrees to serve as a mask for the second sensing layer. If the second sensing layer is formed before the first sensing layer, when the first sensing layer is formed, the mask of the second sensing layer can be rotated by 90 degrees to serve as a mask for the first sensing layer. This saves production costs and simplifies the manufacturing process.
  • the peripheral lines of the edge portion of the touch screen may be simultaneously formed.
  • the peripheral lines may be formed simultaneously with the metal lines of the second sensing layer.
  • the method further includes: forming a pattern including a black matrix on the substrate 100 by using a photolithography process, and vertically projecting the black matrix onto the plane of the touch screen to cover the first metal line and A vertical projection of the second metal line on the plane of the touch screen such that the formed black matrix layer can be used to shield the metal lines.
  • the method further includes: forming the insulating layer 200 to maintain electrical insulation between the first sensing layer and the second sensing layer.
  • first transparent electrode 1 of the first sensing layer, the first metal line 2 of the first sensing layer, and the metal electrode of the first sensing layer in FIG. 1 to FIG. 7 are indicated by broken lines, and the second The second transparent electrode 3 of the sensing layer and the second metal line 4 of the second sensing layer and the metal electrode of the second sensing layer are indicated by solid lines.
  • An embodiment of the present invention further provides a display device, including any of the touch screens described above.
  • the display device may be a display device such as a liquid crystal display, an electronic paper, an OLED (Organic Light-Emitting Diode) display, or a television, a digital camera, a mobile phone, a watch, a tablet, or a notebook computer including the display device. , navigation, etc.
  • a display device such as a liquid crystal display, an electronic paper, an OLED (Organic Light-Emitting Diode) display, or a television, a digital camera, a mobile phone, a watch, a tablet, or a notebook computer including the display device. , navigation, etc.
  • a product or part that has a display function may be a display device such as a liquid crystal display, an electronic paper, an OLED (Organic Light-Emitting Diode) display, or a television, a digital camera, a mobile phone, a watch, a tablet, or a notebook computer including the display device. , navigation, etc.
  • a product or part that has a display function such as
  • the first sensing layer and the second sensing layer are both combined with a transparent electrode and a plurality of sensing lines are formed by transparent electrodes and The metal wires are alternately connected in series, and the touch screen is between the metal wires of the first sensing layer and the transparent electrodes of the second sensing layer, the transparent electrodes of the first sensing layer, and the metal wires of the second sensing layer.
  • Mutual capacitance is generated to achieve touch.
  • the sensing line of the touch screen sensing layer by changing the sensing line of the touch screen sensing layer from the entire metal line to the structure in which the metal line and the transparent electrode are alternately connected in series, the density of the metal line is significantly reduced, and the metal lines are spaced and irregularly arranged.
  • the method for eliminating moiré in the embodiment of the present invention is a transparent electrode and a metal line spacer connection, it is not necessary to reduce the line width of the metal line to eliminate the moiré, so that the metal line is fabricated.
  • the difficulty and production cost are low, and it can ensure sufficient strength, is not easy to break, and is not easily broken by static electricity.

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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)
  • Position Input By Displaying (AREA)

Abstract

一种触摸屏及其制作方法及显示装置，该触摸屏包括层叠的第一感应层（10）和第二感应层（11），第一感应层包括多列第一感应线（12），每条第一感应线由第一透明电极（1）与第一金属线（2）交替串接形成；第二感应层包括多行第二感应线（34），每条第二感应线由第二透明电极（3）与第二金属线（4）交替串接形成；在第一感应层和第二感应层向触摸屏平面上的垂直投影中，第一透明电极（1）和第二透明电极（3）沿列方向和行方向均交替排布，第一金属线（2）和第二金属线（4）沿列方向和行方向均交替排布，且第一金属线（2）横跨第二透明电极（3），第二金属线（4）横跨第一透明电极（1）。该触摸屏能够解决摩尔纹问题。

Description

触摸屏及其制作方法及显示装置 技术领域
本发明实施例涉及一种触摸屏及其制作方法及显示装置。
背景技术
在触摸屏行业中，采用金属网格作为触控的驱动线和感应线的做法被广泛应用。相对于氧化铟锡，金属网格以其较快的信号传递速度成为领域内技术人员的研究热点。但是金属网格应用在触摸屏中，存在很多问题，尤其以摩尔纹问题最难解决。
通常通过降低金属线的线宽来解决摩尔纹问题。但是降低金属线的线宽会造成制作工艺难度和制作成本的增加，并且将金属线宽降得很低极易造成金属线断裂、抗静电击穿能力差等问题。
发明内容
本发明实施例提供一种触摸屏及其制作方法及显示装置，既能够解决摩尔纹问题，又不会造成制作工艺难度和制作成本增加、金属线断裂、抗静电击穿能力差的问题。
本发明实施例提供一种触摸屏，包括：
第一感应层，所述第一感应层包括多列第一感应线，每条所述第一感应线由第一透明电极与第一金属线交替串接形成；
与所述第一感应层层叠的第二感应层，所述第二感应层包括多行第二感应线，每条所述第二感应线由第二透明电极与第二金属线交替串接形成；
其中，在所述第一感应层和所述第二感应层向所述触摸屏平面上的垂直投影中，所述第一感应层的第一透明电极和所述第二感应层的第二透明电极沿列方向和行方向均交替排布，所述第一感应层的第一金属线和所述第二感应层的第二金属线沿列方向和行方向均交替排布，且所述第一感应层的第一金属线横跨所述第二感应层的第二透明电极，所述第二感应层的第二金属线横跨所述第一感应层的第一透明电极。
例如，该触摸屏中，所述第一金属线和所述第二金属线的宽度均为5μm～ 8μm。
例如，该触摸屏中，所述第一金属线的中间部位具有第一金属电极，所述第一金属线与所述第一金属电极电性相连。
例如，该触摸屏中，所述第一金属电极为垂直于所述第一金属线延伸方向的金属电极线；或者，
所述第一金属电极为由金属电极线构成的菱形框；或者，
所述第一金属电极为由金属电极线构成的圆形框。
例如，该触摸屏中，所述第二金属线的中间部位具有第二金属电极，所述第二金属线与所述第二金属电极电性相连。
例如，该触摸屏中，所述第二金属电极为垂直于所述第二金属线延伸方向的金属电极线；或者，
所述第二金属电极为由金属电极线构成的菱形框；或者，
所述第二金属电极为由金属电极线构成的圆形框。
例如，该触摸屏还包括：
基板，所述第一感应层和所述第二感应层层叠于所述基板上；
位于所述基板与所述第一感应层和所述第二感应层中更靠近所述基板的一者之间的黑矩阵，其中，所述黑矩阵向所述触摸屏平面上的垂直投影涵盖所述第一金属线和所述第二金属线在所述触摸屏平面上的垂直投影。
例如，该触摸屏还包括位于所述第一感应层和所述第二感应层之间的绝缘层。
本发明实施例还提供一种触摸屏的制作方法，用于制作权利要求1～8任一项所述的触摸屏，所述制作方法包括：
在基板上形成第一感应层，所述第一感应层包括多列第一感应线，每条所述第一感应线由第一透明电极与第一金属线交替串接形成；
在所述基板上形成第二感应层，所述第二感应层与所述第一感应层层叠，所述第二感应层包括多行第二感应线，每条所述第二感应线由第二透明电极与第二金属线交替串接形成；在所述第一感应层和所述第二感应层向所述触摸屏平面上的垂直投影中，所述第一感应层的第一透明电极和所述第二感应层的第二透明电极沿列方向和行方向均交替排布，所述第一感应层的第一金属线和所述第二感应层的第二金属线沿列方向和行方向均交替排布，且所述 第一感应层的第一金属线横跨所述第二感应层的第二透明电极，所述第二感应层的第二金属线横跨所述第一感应层的第一透明电极。
例如，该触摸屏的制作方法中，所述在基板上形成第一感应层包括：
采用光刻工艺形成包括所述第一感应层的第一透明电极的图形；
采用光刻工艺形成包括所述第一感应层的第一金属线的图形；
其中，所述第一感应层的第一透明电极与所述第一感应层的第一金属线的形成不分先后顺序。
例如，该触摸屏的制作方法中，所述在所述基板上形成第二感应层包括：
采用光刻工艺形成包括所述第二感应层的第二透明电极的图形；
采用光刻工艺形成包括所述第二感应层的第二金属线的图形；
其中，所述第二感应层的第二透明电极与所述第二感应层的第二金属线的形成不分先后顺序。
例如，该触摸屏的制作方法中，在形成所述第一感应层和所述第二感应层之前还包括：采用光刻工艺在所述基板上形成包括黑矩阵的图形，其中，所述黑矩阵向所述触摸屏平面上的垂直投影涵盖所述第一金属线和所述第二金属线在所述触摸屏平面上的垂直投影。
例如，该触摸屏的制作方法还包括形成绝缘层的步骤，其中，所述绝缘层位于所述第一感应层和所述第二感应层之间。
本发明实施例还提供一种显示装置，包括上述任一所述触摸屏。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为本发明实施例所提供的触摸屏的平面示意图；
图2为图1中A-A截面的放大示意图；
图3为图1中B-B截面的放大示意图；
图4为本发明实施例所提供的触摸屏的金属线的平面示意图；
图5为本发明实施例所提供的具有第一种结构的金属电极的触摸屏示意图；
图6为本发明实施例所提供的具有第二种结构的金属电极的触摸屏示意图；
图7为本发明实施例所提供的具有第三种结构的金属电极的触摸屏示意图；
图8为本发明实施例所提供的图1中的触摸屏设置黑矩阵的情况下的A-A截面的放大示意图；
图9为本发明实施例所提供的图1中的触摸屏设置黑矩阵的情况下的B-B截面的放大示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。
下面结合附图对本发明实施例所提供的触摸屏及其制作方法进行详细描述。
本发明实施例提供一种触摸屏，如图1～图4所示，包括：第一感应层10，第一感应层10包括多列第一感应线12，每条第一感应线12由第一透明电极1与第一金属线2交替串接形成；与第一感应层10层叠的第二感应层11，第二感应层11包括多行第二感应线34，每条第二感应线34由第二透明电极3与第二金属线4交替串接形成；其中，在第一感应层10和第二感应层11向触摸屏平面上的垂直投影中，第一感应层的第一透明电极1和第二感应层的第二透明电极3沿列方向和行方向均交替排布，第一感应层的第一金属线2和第二感应层的第二金属线4沿列方向和行方向均交替排布，且第一感应层的第一金属线2横跨第二感应层的第二透明电极3，第二感应层的第二 金属线4横跨第一感应层的第一透明电极1。
本发明实施例提供的上述触摸屏中，如图1所示，每条第一感应线包括多个第一透明电极1和多条第一金属线2，每条第二感应线包括多个第二透明电极3和多条第二金属线4。
本发明实施例提供的上述触摸屏，在触控感应时第一感应层的第一金属线2与第二感应层的第二透明电极3之间、第一感应层的第一透明电极1和第二感应层的第二金属线4之间产生互电容，从而实现触控。
本发明实施例通过将触摸屏感应层的感应线由整条的金属线改变为金属线与透明电极交替串接的结构，使金属线的密度明显降低，并且金属线为间隔的、不规则的排列方式，从而消除摩尔纹的出现。同时由于本发明实施例消除摩尔纹所采用的方式为透明电极和金属线间隔连接，因此无须减小金属线的线宽来消除摩尔纹，使得金属线的制作难度和制作成本较低，且能够保证足够的强度，不易断裂，也不易被静电击穿。
本发明实施例中，金属线包括第一金属线2和/或第二金属线4，透明电极包括第一透明电极1和/或第二透明电极3。
图4是触摸屏隐藏透明电极后仅剩余金属线的图案，横向金属线与竖向金属线处于不同的层。通过此图可以看出，通过引入第一透明电极1、第二透明电极3后，第一金属线2、第二金属线4的密度明显的降低，并且第一金属线2、第二金属线4属于间隔的排列方式。
例如，本发明实施例的金属线的宽度可为5μm～8μm，这样可以保证金属线具有足够的强度，避免断裂和被静电击穿。
此外，相对于单纯的金属网格的模式，本发明实施例相当于将一部分金属线替换为透明电极。由于透明电极具有较好的光学透过率，因此本实施例中引入透明电极还可以增加触摸屏的光学透过率。
相对于单纯的透明电极图案，本实施例的设计又可以增大信号的传递速度，降低电容延迟(RC Delay)值，从而增加触摸屏的触控灵敏度。
需要说明的是，第一感应层(或第二感应层)可以为靠近基板的层，也可以为远离基板的层，本发明实施例以第一感应层作为靠近基板的层，第二感应层作为远离基板的层为例进行说明。
进一步地，第一金属线2的中间部位可具有第一金属电极5，第二金属 线4的中间部位可具有第二金属电极6，且第一金属线2与第一金属电极5电性相连，第二金属线4与第二金属电极6电性相连。第一金属电极5能够增大第一金属线2与不同层的第二透明电极3之间的互电容的面积，第二金属电极6能够增大第二金属线4与不同层的第一透明电极1之间的互电容的面积，从而增大互电容，增加触摸屏的灵敏度。
如图5所示，第一金属电极5可为垂直于第一金属线延伸方向的金属电极线，第二金属电极6可为垂直于第二金属线延伸方向的金属电极线，金属电极线的长度限定为仅与与其自身相交的金属线电性相连，而不与其它金属线电性相连的长度。例如，可为其长度不超出自身所对应的透明电极的长度。通过在第一金属线2上设置垂直于第一金属线2延伸方向的金属电极线，以与第一金属线2形成十字的图形，以及在第二金属线4上设置垂直于第二金属线4延伸方向的金属电极线，以与第二金属线4形成十字的图形，能够增大第一感应层与第二感应层之间的互电容，从而进一步增大触控的灵敏度。
或者，如图6所示，第一金属电极和第二金属电极可为由金属电极线构成的菱形框，以增大互电容。
或者，如图7所示，第一金属电极和第二金属电极可为由金属电极线构成的圆形框，以增大互电容。
当然，第一金属电极和第二金属电极还可为任何其它形状的图案，只要其能够增大上下极板之间的相对面积，增加互电容的产生，实现进一步增大触控的灵敏度的目的即可。
本实施例中，第一透明电极1和第二透明电极3一般为氧化铟锡(Indium Tin Oxide，简称ITO)。
一般地，触摸屏还包括：基板100，第一感应层和第二感应层层叠于基板100上；以及位于基板100与第一感应层和第二感应层中更靠近基板100的一者之间的黑矩阵(Black Matrix，简称BM)21，黑矩阵向触摸屏平面上的垂直投影涵盖第一金属线和第二金属线在触摸屏平面上的垂直投影，从而使黑矩阵能够用来遮挡金属线，可防止金属线处的漏光。例如，可如图8和图9所示。例如，在第一感应层和第二感应层中更靠近基板100的一者和黑矩阵21之间还可设置有平坦层或绝缘层22。
触摸屏还可包括：位于第一感应层和第二感应层之间的绝缘层200，以 起到第一感应层和第二感应层之间的绝缘的作用，绝缘层200的形成材料可以为光学胶(Optical Cement，简称OC)。
对应于以上所提供的触摸屏，本发明实施例提供一种触摸屏的制作方法，用于制作以上所提供的触摸屏，该制作方法包括：
在基板100上形成第一感应层，第一感应层包括多列第一感应线，每条第一感应线由第一透明电极1与第一金属线2交替串接形成；
在基板100上形成第二感应层，第二感应层与第一感应层层叠，第二感应层包括多行第二感应线，每条第二感应线由第二透明电极3与第二金属线4交替串接形成；在第一感应层和第二感应层向触摸屏平面上的垂直投影中，第一感应层的第一透明电极1和第二感应层的第二透明电极3沿列方向和行方向均交替排布，第一感应层的第一金属线2和第二感应层的第二金属线4沿列方向和行方向均交替排布，且第一感应层的第一金属线2横跨第二感应层的第二透明电极3，第二感应层的第二金属线4横跨第一感应层的第一透明电极1。
该触摸屏的制作方法，由整条的金属线改变为金属线与透明电极交替串接(第一透明电极与第一金属线交替串接，第二透明电极与第二金属线交替串接)的结构，使金属线(第一金属线和第二金属线)的密度明显降低，并且金属线(第一金属线和第二金属线)为间隔的、不规则的排列方式，从而消除摩尔纹的出现。同时采用透明电极和金属线间隔连接(相邻两个第一透明电极通过第一金属线连接，相邻两个第二透明电极通过第二金属线连接)的方式来消除摩尔纹，无须减小金属线的线宽来消除摩尔纹，使得金属线的制作难度和制作成本较低，且能够保证金属线具有足够的强度，不易断裂，也不易被静电击穿。
例如，在基板100上形成第一感应层包括：采用光刻工艺形成包括第一感应层的第一透明电极1的图形；采用光刻工艺形成包括第一感应层的第一金属线2的图形；其中，第一感应层的第一透明电极1与第一感应层的第一金属线2的形成不分先后顺序。需要说明的是，光刻工艺包括涂胶、曝光、显影、刻蚀、清洗等工艺流程。
在基板100上形成第二感应层包括：采用光刻工艺形成包括第二感应层的第二透明电极3的图形；采用光刻工艺形成包括第二感应层的第二金属线 4的图形；其中，第二感应层的第二透明电极3与所述第二感应层的第二金属线4的形成不分先后顺序。
由于所制作的金属线能够采用较大的线宽，因此在光刻的曝光、显影、刻蚀过程中，对掩膜板精度、对位精度及刻蚀精度的要求降低，因此第一感应层和第二感应层的制作难度降低。
由上述以及图1～图7可知，第一和第二感应层的内部结构朝向正好垂直，因此在曝光显影工艺中，第一感应层和第二感应层的形成可利用同一掩膜版。例如，若第一感应层先于第二感应层形成，则在形成第二感应层时，可将第一感应层的掩膜板旋转90度以作为第二感应层的掩膜板。若第二感应层先于第一感应层形成，则在形成第一感应层时，可将第二感应层的掩膜板旋转90度以作为第一感应层的掩膜板。从而可节省制作成本，简化制作工艺。
本实施例中，若第一感应层为靠近基板的层，第二感应层为远离基板的层，那么在形成第一感应层的金属线的时候，还可以同时形成触摸屏边缘部分的外围线路。相反，若第二感应层为靠近基板的层，第一感应层为远离基板的层，那么外围线路可以与第二感应层的金属线同时形成。从而可节省工艺步骤，提高生产效益。
一般地，在形成第一感应层和第二感应层之前还可包括：采用光刻工艺在基板100上形成包括黑矩阵的图形，使黑矩阵向触摸屏平面上的垂直投影涵盖第一金属线和第二金属线在所述触摸屏平面上的垂直投影，从而所形成的黑矩阵层能够用于遮挡金属线。
在形成所述第一感应层和形成所述第二感应层之前还可包括：形成绝缘层200，以使第一感应层与第二感应层之间保持电性绝缘。
需要说明的是，为了便于区分，图1～图7中第一感应层的第一透明电极1、第一感应层的第一金属线2和第一感应层的金属电极用虚线表示，第二感应层的第二透明电极3和第二感应层的第二金属线4和第二感应层的金属电极用实线表示。
本发明实施例还提供一种显示装置，包括上述任一所述触摸屏。
例如，所述显示装置可以为液晶显示器、电子纸、OLED(Organic Light-Emitting Diode，有机发光二极管)显示器等显示器件以及包括这些显示器件的电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任 何具有显示功能的产品或者部件。
本发明实施例所提供的触摸屏及其制作方法及显示装置中，其第一感应层和第二感应层均采用金属线与透明电极结合的结构，所包括的多条感应线均由透明电极与金属线交替串接形成，触摸屏在触控感应时，其第一感应层的金属线与第二感应层的透明电极之间、第一感应层的透明电极和第二感应层的金属线之间产生互电容，从而实现触控。本发明实施例通过将触摸屏感应层的感应线由整条的金属线改变为金属线与透明电极交替串接的结构，使金属线的密度明显降低，并且金属线为间隔的、不规则的排列方式，从而消除摩尔纹的出现；同时由于本发明实施例消除摩尔纹所采用的方式为透明电极和金属线间隔连接，因此无须减小金属线的线宽来消除摩尔纹，使得金属线的制作难度和制作成本较低，且能够保证足够的强度，不易断裂，也不易被静电击穿。
以上，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。
本专利申请要求于2014年12月5日递交的中国专利申请第201410734798.2号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (13)

  1. 一种触摸屏，包括：
    第一感应层，所述第一感应层包括多列第一感应线，每条所述第一感应线由第一透明电极与第一金属线交替串接形成；
    与所述第一感应层层叠的第二感应层，所述第二感应层包括多行第二感应线，每条所述第二感应线由第二透明电极与第二金属线交替串接形成；
    其中，在所述第一感应层和所述第二感应层向所述触摸屏平面上的垂直投影中，所述第一感应层的第一透明电极和所述第二感应层的第二透明电极沿列方向和行方向均交替排布，所述第一感应层的第一金属线和所述第二感应层的第二金属线沿列方向和行方向均交替排布，且所述第一感应层的第一金属线横跨所述第二感应层的第二透明电极，所述第二感应层的第二金属线横跨所述第一感应层的第一透明电极。
  2. 根据权利要求1所述的触摸屏，其中，所述第一金属线和所述第二金属线的宽度均为5μm～8μm。
  3. 根据权利要求1或2所述的触摸屏，其中，所述第一金属线的中间部位具有第一金属电极，所述第一金属线与所述第一金属电极电性相连。4、根据权利要求3所述的触摸屏，其中，所述第一金属电极为垂直于所述第一金属线延伸方向的金属电极线；或者，
    所述第一金属电极为由金属电极线构成的菱形框；或者，
    所述第一金属电极为由金属电极线构成的圆形框。
  4. 根据权利要求1～4任一项所述的触摸屏，其中，所述第二金属线的中间部位具有第二金属电极，所述第二金属线与所述第二金属电极电性相连。
  5. 根据权利要求5所述的触摸屏，其中，所述第二金属电极为垂直于所述第二金属线延伸方向的金属电极线；或者，
    所述第二金属电极为由金属电极线构成的菱形框；或者，
    所述第二金属电极为由金属电极线构成的圆形框。
  6. 根据权利要求1～6任一项所述的触摸屏，还包括：
    基板，所述第一感应层和所述第二感应层层叠于所述基板上；
    位于所述基板与所述第一感应层和所述第二感应层中更靠近所述基板的 一者之间的黑矩阵，其中，所述黑矩阵向所述触摸屏平面上的垂直投影涵盖所述第一金属线和所述第二金属线在所述触摸屏平面上的垂直投影。
  7. 根据权利要求7所述的触摸屏，还包括位于所述第一感应层和所述第二感应层之间的绝缘层。
  8. 一种触摸屏的制作方法，用于制作权利要求1～8任一项所述的触摸屏，所述制作方法包括：
    在基板上形成第一感应层，所述第一感应层包括多列第一感应线，每条所述第一感应线由第一透明电极与第一金属线交替串接形成；
    在所述基板上形成第二感应层，所述第二感应层与所述第一感应层层叠，所述第二感应层包括多行第二感应线，每条所述第二感应线由第二透明电极与第二金属线交替串接形成；在所述第一感应层和所述第二感应层向所述触摸屏平面上的垂直投影中，所述第一感应层的第一透明电极和所述第二感应层的第二透明电极沿列方向和行方向均交替排布，所述第一感应层的第一金属线和所述第二感应层的第二金属线沿列方向和行方向均交替排布，且所述第一感应层的第一金属线横跨所述第二感应层的第二透明电极，所述第二感应层的第二金属线横跨所述第一感应层的第一透明电极。
  9. 根据权利要求9所述的触摸屏的制作方法，其中，所述在基板上形成第一感应层包括：
    采用光刻工艺形成包括所述第一感应层的第一透明电极的图形；
    采用光刻工艺形成包括所述第一感应层的第一金属线的图形；
    其中，所述第一感应层的第一透明电极与所述第一感应层的第一金属线的形成不分先后顺序。
  10. 根据权利要求9所述的触摸屏的制作方法，其中，所述在所述基板上形成第二感应层包括：
    采用光刻工艺形成包括所述第二感应层的第二透明电极的图形；
    采用光刻工艺形成包括所述第二感应层的第二金属线的图形；
    其中，所述第二感应层的第二透明电极与所述第二感应层的第二金属线的形成不分先后顺序。
  11. 根据权利要求9～任一项所述的触摸屏的制作方法，在形成所述第 一感应层和所述第二感应层之前还包括：采用光刻工艺在所述基板上形成包括黑矩阵的图形，其中，所述黑矩阵向所述触摸屏平面上的垂直投影涵盖所述第一金属线和所述第二金属线在所述触摸屏平面上的垂直投影。
  12. 根据权利要求12所述的触摸屏的制作方法，还包括形成绝缘层的步骤，其中，所述绝缘层位于所述第一感应层和所述第二感应层之间。
  13. 一种显示装置，包括权利要求1～8任一项所述触摸屏。
PCT/CN2015/081987 2014-12-05 2015-06-19 触摸屏及其制作方法及显示装置 WO2016086648A1 (zh)

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