WO2022001412A1 - 触控基板及触控显示装置 - Google Patents

触控基板及触控显示装置 Download PDF

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Publication number
WO2022001412A1
WO2022001412A1 PCT/CN2021/093654 CN2021093654W WO2022001412A1 WO 2022001412 A1 WO2022001412 A1 WO 2022001412A1 CN 2021093654 W CN2021093654 W CN 2021093654W WO 2022001412 A1 WO2022001412 A1 WO 2022001412A1
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WO
WIPO (PCT)
Prior art keywords
touch
substrate
electrodes
grid
touch electrodes
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PCT/CN2021/093654
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English (en)
French (fr)
Inventor
庞斌
谢晓冬
何敏
钟腾飞
赵雪
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
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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 US17/776,897 priority Critical patent/US11755164B2/en
Publication of WO2022001412A1 publication Critical patent/WO2022001412A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • 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
    • 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
    • G06F3/0445—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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • G—PHYSICS
    • 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 disclosure relate to a touch substrate and a touch display device.
  • the touch electrodes of the metal mesh structure have beneficial properties such as fast signal transmission speed, and are gradually being accepted and popularized.
  • a touch substrate in one aspect, includes: a substrate; a plurality of first touch electrodes disposed on the substrate, the plurality of first touch electrodes extending along a first direction; and a plurality of first touch electrodes disposed on the substrate A plurality of second touch electrodes extend along a second direction crossing the first direction, and the plurality of second touch electrodes and the plurality of first touch electrodes are insulated from each other.
  • each of the first touch electrodes and each of the second touch electrodes includes a grid structure and a plurality of first dummy electrodes;
  • the grid structure includes a plurality of first grids, and each first grid is provided with There is at least one first dummy electrode, and each first dummy electrode and the first grid where it is located are insulated from each other;
  • the orthographic projection of the plurality of first touch electrodes on the substrate and the plurality of second touch electrodes are in The orthographic projection of the substrate intersects to form a plurality of intersecting regions; in each intersecting region, the orthographic projection of the first touch electrode and the second touch electrode on the grid structure of the first touch electrode
  • the grid structure in the orthographic projection of the substrate forms a projected grid structure;
  • the projected grid structure has a plurality of second grids, and each of the orthographic projections of the first virtual electrodes on the substrate is located in one In the second grid, the orthographic projection of each of the first dummy electrodes on the substrate includes at least two line segments, the at
  • a predetermined distance is left between the first dummy electrode and the edge of the first grid where the first dummy electrode is located.
  • the set spacing is 4 ⁇ m ⁇ 12 ⁇ m.
  • each of the second grids includes: a first edge, where the first edge is a partial orthographic projection of the grid structure in the first touch electrodes on the substrate; a second edge , the second edge is a partial orthographic projection of the grid structure in the second touch electrode on the substrate.
  • the orthographic projection of the first dummy electrode in the first touch electrodes on the substrate and the second edge of the second grid where the first dummy electrode is located are connected to each other or partially overlap each other; and/or, The orthographic projection of the first dummy electrodes in the second touch electrodes on the substrate and the first edge of the second grid where the first dummy electrodes are located are connected to each other or partially overlap each other.
  • the shape of the first grid is a square, a long direction, a rhombus or a regular hexagon; the shape of the second grid is a square, a rectangle or a rhombus.
  • the area of the first grid is an integer multiple of the area of the second grid.
  • At least two line segments in each of the first dummy electrodes intersect at a first intersection point, and the first intersection point is located at the center of the second grid where it is located.
  • each of the first dummy electrodes includes two line segments intersecting at the same point, and the two line segments are respectively parallel to two adjacent sides of the second grid.
  • the first grid in the first touch electrodes and the first grid in the second touch electrodes are both first diamond grids; the two first grids in the first touch electrodes A dummy electrode is disposed in a first rhombus in the first touch electrodes, and is spaced along the first diagonal direction of the first rhombus; two of the second touch electrodes A dummy electrode is disposed in a first diamond-shaped grid of the second touch electrodes, and is arranged at intervals along the second diagonal direction of the first diamond-shaped grid; The first diagonal line of a rhombus is spatially perpendicular to the second diagonal line of the first rhombus in the second touch electrodes.
  • the second grid is a second rhombus, each side of the second rhombus is parallel to each side of the first rhombus, and the area of the second rhombus is 1/4 of the area of the first rhombus.
  • each of the first dummy electrodes includes two line segments intersecting at the same point, the centers of the two line segments are located at the center of the second rhombus, and the two line segments are respectively parallel to the two adjacent sides of the second rhombus.
  • the touch substrate further includes: a plurality of second dummy electrodes disposed in the same layer as the first touch electrodes and located between two adjacent first touch electrodes; and /or a plurality of third dummy electrodes disposed in the same layer as the second touch electrodes and located between two adjacent second touch electrodes.
  • the distance between two adjacent first touch electrodes is 40 ⁇ m ⁇ 50 ⁇ m; and/or, the distance between two adjacent second touch electrodes is 40 ⁇ m ⁇ 50 ⁇ m.
  • the plurality of first touch electrodes are a plurality of driving electrodes
  • the plurality of second touch electrodes are a plurality of sensing electrodes
  • the plurality of first touch electrodes are a plurality of Induction electrodes
  • the plurality of second touch electrodes are a plurality of driving electrodes.
  • the touch substrate further includes: an insulating layer disposed between the plurality of second touch electrodes and the plurality of first touch electrodes, so that the plurality of second touch electrodes and the plurality of first touch electrodes are insulated from each other.
  • a touch display device in another aspect, includes: the touch substrate according to any one of the above embodiments.
  • the substrate of the touch substrate is a protective cover plate; or, the substrate of the touch substrate is a color filter substrate; or, the substrate of the touch substrate is a substrate for packaging a display substrate the encapsulation layer.
  • the touch display device is a liquid crystal display device, and the liquid crystal display device includes an array substrate and an opposite substrate arranged in a cell-to-cell arrangement, and a liquid crystal located therebetween; a backing of the touch substrate The bottom is the opposite substrate, and the plurality of first touch electrodes and the plurality of second touch electrodes of the touch substrate are located on a side of the opposite substrate away from the liquid crystal.
  • the touch display device further includes: a polarizer, a plurality of first touch electrodes and a plurality of second touch electrodes disposed on the touch substrate far from the substrate of the touch substrate side.
  • the touch display device further includes: an adhesive layer disposed between the polarizer and the touch substrate; the resistivity of the adhesive layer is 10 8 ⁇ m ⁇ 10 11 ⁇ ⁇ m.
  • FIG. 1A is a structural diagram of a touch substrate according to some embodiments.
  • FIG. 1B is a structural diagram of another touch substrate according to some embodiments.
  • FIG. 2A is a structural diagram of a first touch electrode according to some embodiments.
  • 2B is a structural diagram of a second touch electrode according to some embodiments.
  • 3A is a structural diagram of an overlapping area between a first touch electrode and a second touch electrode according to some embodiments
  • 3B is a structural diagram of another overlapping area between the first touch electrodes and the second touch electrodes according to some embodiments.
  • 3C is a structural diagram of still another overlapping area between the first touch electrodes and the second touch electrodes according to some embodiments;
  • FIG. 3D is an enlarged view of the structure of the touch substrate in FIG. 1B at the U position;
  • FIG. 4 is a structural diagram of a first dummy electrode according to some embodiments.
  • 5A is a structural diagram of another first dummy electrode according to some embodiments.
  • 5B is a structural diagram of still another first dummy electrode according to some embodiments.
  • 5C is a structural diagram of yet another first dummy electrode according to some embodiments.
  • FIG. 6 is a cross-sectional view of a touch substrate according to some embodiments.
  • FIG. 7A is a cross-sectional view of a touch display device according to some embodiments.
  • FIG. 7B is a cross-sectional view of another touch display device according to some embodiments.
  • FIG. 7C is a cross-sectional view of yet another touch display device according to some embodiments.
  • FIG. 7D is a cross-sectional view of yet another touch display device according to some embodiments.
  • FIG. 7E is a cross-sectional view of yet another touch display device according to some embodiments.
  • FIG. 8 is a flowchart of a method for fabricating a touch substrate according to some embodiments.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • plural means two or more.
  • At least one of A, B, and C has the same meaning as “at least one of A, B, or C”, and both include the following combinations of A, B, and C: A only, B only, C only, A and B , A and C, B and C, and A, B, and C.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • the touch substrate includes a substrate 10 , and a plurality of first touch electrodes 1 and a plurality of second touch electrodes 2 disposed on the substrate 10 .
  • the plurality of first touch electrodes 1 extend along the first direction OX
  • the plurality of second touch electrodes 2 extend along the second direction OY
  • the plurality of second touch electrodes 2 and the plurality of first touch electrodes 1 are between insulated from each other.
  • the first direction OX and the second direction OY cross each other, for example, the first direction OX and the second direction OY may be perpendicular to each other.
  • each of the first touch electrodes 1 and each of the second touch electrodes 2 includes a grid structure 30 and a plurality of first dummy electrodes 41 .
  • the mesh structure 30 consists of a plurality of wires (for example, a plurality of first wires 31 and a plurality of second wires 32 in FIG. 2A , or a plurality of first wires 31 and a plurality of second wires 32 in FIG. 2B ) Formed in a cross-arrangement, the plurality of wires can be used to transmit electrical signals.
  • the grid structure 30 includes a plurality of first grids 301, and at least one first dummy electrode 41 is arranged in each of the first grids 301 (for example, FIG. 2A and FIG.
  • the dummy electrode 41 is taken as an example for illustration. It can be understood that this embodiment and the corresponding drawings do not limit the number of the first dummy electrodes in the first grid 301 ), and each first dummy electrode 41 and the first grid 301 where it is located are not limited. insulated from each other.
  • the orthographic projections of the plurality of first touch electrodes 1 on the substrate 10 intersect with the orthographic projections of the plurality of second touch electrodes 2 on the substrate 10 to form a plurality of intersections area A.
  • the orthographic projection of the grid structures 30 in the first touch electrodes 1 on the substrate 10 and the orthographic projection of the grid structures 30 in the second touch electrodes 2 on the substrate 10 form a projection grid lattice structure.
  • the projection grid structure has a plurality of second grids 302, the orthographic projection of each first dummy electrode 41 on the substrate 10 is located in one of the second grids 302, and the orthographic projection of each first dummy electrode 41 on the substrate 10 includes At least two line segments, the at least two line segments are crossed, and there is no closed area between the at least two line segments.
  • each intersection area A there are multiple overlapping areas C in which the orthographic projections of the plurality of wires of the first touch electrode 1 overlap with the orthographic projections of the plurality of wires of the second touch electrode 2 , Since each wire of the first touch electrode 1 and each wire of the second touch electrode 2 are electrically insulated, a mutual capacitance formed by corresponding two wires is generated at each overlapping region C.
  • the wire arrangement density of each of the first touch electrodes 1 and each of the second touch electrodes 2 is usually relatively high, so there are more wires in each intersection area A.
  • the overlapping area C of the first touch electrode 1 and the second touch electrode 2 results in a large mutual inductance capacitance value, which in turn causes the delay of the resistance and capacitance of the touch circuit in the touch display device using the touch substrate.
  • the signal transmission speed of the touch display device is reduced.
  • by increasing the size of each first grid 301 in each first touch electrode 1 and the size of each first grid 301 in each second touch electrode 2 the The wire arrangement density of the first touch electrodes 1 and the second touch electrodes 2 in each intersection area A is reduced.
  • the size of each first grid 301 is set to be relatively large, it will cause the human eye to be able to distinguish each first grid 301 .
  • the first grid 301 is more easily perceived by the human eye. Then, when the touch display device is used, the existence of the plurality of first touch electrodes 1 and the plurality of second touch electrodes 2 can be detected, which reduces the display effect of the touch display device.
  • each of the first dummy electrodes 41 is A dummy electrode and the first grid 301 where it is located are insulated from each other, that is, there is no electrical signal transmission in each first dummy electrode, so the plurality of first touch electrodes 1 and the plurality of second touch electrodes 2
  • the arrangement density of wires for transmitting electrical signals is relatively low (for example, referring to FIG.
  • the distance L1 between two adjacent wires in the first touch electrode 1 is increased from 100 ⁇ m ⁇ 200 ⁇ m in the related art to 300 ⁇ m ⁇ 300 ⁇ m 400 ⁇ m
  • the distance L2 between two adjacent wires in the second touch electrode 2 is increased from 100 ⁇ m to 200 ⁇ m in the related art to 300 ⁇ m to 400 ⁇ m)
  • the first touch electrode 1 and the second touch The value of mutual inductance and capacitance generated between the control electrodes 2 is relatively low, so that the resistance-capacitance delay of the touch circuit in the touch display device can be improved, and the signal transmission speed of the touch display device can be improved.
  • each first dummy electrode 41 is The orthographic projection of the dummy electrode 41 on the substrate 10 is located in a second grid 302 , which makes the first grid 301 and the second grid 302 be divided into a plurality of regions with smaller sizes, thereby making the first grid 301 and the second grid 302
  • the grid 302 is not easily observed by the human eye, that is, the human eye can avoid the existence of the plurality of first touch electrodes 1 and the plurality of second touch electrodes 2 in the touch substrate 100 to ensure the touch Control the display effect of the display device.
  • the size of the first grid 301 refers to the maximum distance between the opposite sides of the first grid 301
  • the size of the second grid 302 refers to the maximum distance between the opposite sides of the second grid 302 .
  • FIG. 4 shows the first dummy electrode 41 in some embodiments.
  • the first dummy electrode 41 has a closed region Q therein.
  • the inventors of the present disclosure have found through research that when a touch operation is performed on a touch display device having the touch substrate, the plurality of first touch electrodes 1 and the plurality of second touch electrodes 2 Charges are easily accumulated on the mesh structure 30 and the first dummy electrode 41 .
  • the charges on the grid structure 30 are easily derived, but the first dummy electrodes 41 are mostly isolated rhombus structures as shown in FIG.
  • the difference in electric charge between the two ie, the grid structure 30 and the first dummy electrode 41 ) will result in uneven distribution of the electric field in the entire display area, which in turn will cause the entire screen of the touch display device to display light and dark grids during touch.
  • liquid crystal touch display devices especially for on-cell products without cover glass (that is, the above-mentioned first touch electrodes 1 and second touch electrodes 2 are both disposed outside the liquid crystal cell, and the A display device in which the touch electrodes 1 and the second touch electrodes 2 are only provided with polarizers on the side away from the liquid crystal cell, and no cover glass is further provided on the polarizers;
  • the liquid crystal cell mainly includes an array substrate and For the opposite substrate and the liquid crystal between the two, under normal conditions, the ions in the polarizer, the touch substrate and the liquid crystal cell are in a balanced state, the positive and negative charges are evenly distributed, and the display screen is uniform.
  • the orthographic projection of each first dummy electrode 41 on the substrate 10 is located in a second grid 302
  • the orthographic projection of each first dummy electrode 41 on the substrate 10 is located in a second grid 302
  • the orthographic projection of each first dummy electrode 41 on the substrate 10 is located in a second grid 302
  • the orthographic projection of each first dummy electrode 41 on the substrate 10 includes at least two line segments, the at least two line segments are crossed, and there is no closed area between the at least two line segments.
  • the first dummy electrode in this embodiment may be the first dummy electrode 41 shown in FIG. 2A , FIG. 2B , and FIG. 3A ; for example, the first dummy electrode in this embodiment may also be as shown in FIGS. 5A to 5A .
  • the first dummy electrode 41 shown in 5C is easier to derive, so that the above-mentioned screen is less likely to appear bright and dark during touch.
  • a predetermined distance is left between the first dummy electrode 41 and the edge of the first grid 301 where the first dummy electrode 41 is located. This enables the first dummy electrodes 41 and the first grid 301 where they are located to be insulated from each other.
  • the set spacing is 4 ⁇ m ⁇ 12 ⁇ m, for example, the set spacing may be 4 ⁇ m, 8 ⁇ m, or 12 ⁇ m.
  • the set spacing is 4 ⁇ m ⁇ 12 ⁇ m, for example, the set spacing may be 4 ⁇ m, 8 ⁇ m, or 12 ⁇ m.
  • the set distance is equal to or close to 4 ⁇ m, it can make it less easy for the human eye to see the gap, and further improve the optical uniformity of the touch substrate 100 .
  • the set spacing is equal to or close to 8 ⁇ m, the short circuit phenomenon between the first dummy electrode and the first grid 301 where it is located can be more effectively prevented.
  • each of the second cells 302 includes a first edge b1 and a second edge b2 .
  • the first edge b1 is the partial orthographic projection of the mesh structure 30 in the first touch electrode 1 on the substrate; the second edge b2 is the partial orthographic projection of the mesh structure 30 in the second touch electrode 2 on the substrate projection.
  • the orthographic projection of the first dummy electrode 41 in the first touch electrode 1 on the substrate and the second edge b2 of the second grid 302 where the first dummy electrode 41 is located are connected to each other or partially overlap each other; and/or, the first The orthographic projection of the first dummy electrode 41 in the two touch electrodes 2 on the substrate and the first edge b1 of the second grid 302 where the first dummy electrode 41 is located are connected to each other or partially overlap each other.
  • the orthographic projection of the first dummy electrode 41 in the first touch electrode 1 on the substrate and the second edge b2 of the second grid 302 where the first dummy electrode 41 is located are connected to each other or partially overlap each other , so that on the side of the first touch electrode 1 away from the substrate, the first dummy electrode 41 in the first touch electrode 1 and the second edge b2 of the second grid 302 where the first dummy electrode 41 is located are seen It is connected, that is, there is no gap between the two, so that the number of gaps can be reduced, the optical uniformity can be improved, and the distribution of light and dark caused by too many gaps can be avoided.
  • the orthographic projection of the first dummy electrode 41 in the second touch electrode 2 on the substrate and the first edge b1 of the second grid 302 where the first dummy electrode 41 is located are connected to each other or partially overlap each other, so that in the second On the side of the touch electrode 2 away from the substrate, the first dummy electrode 41 in the second touch electrode 2 is seen to be connected to the first edge b1 of the second grid 302 where the first dummy electrode 41 is located. That is, there is no gap between the two, so that the number of gaps can be further reduced, the optical uniformity can be improved, and the distribution of light and dark caused by too many gaps can be avoided.
  • the shape of the first grid 301 may be a square, a rectangle, a rhombus or a regular hexagon; correspondingly, the shape of the second grid 302 may be a positive direction, a rectangle or a rhombus.
  • the second grid 302 formed by overlapping may be squares with the same shape but different sizes; for another example, when the shape of the first grid 301 is a rectangle, the overlapping grid
  • the second grids 302 can be rectangles with the same shape but different sizes; for another example, as shown in FIGS.
  • the overlapping second grids 302 can have the same shape,
  • the shape of the first grid 301 is a hexagon
  • the shape of the second grid 302 formed by overlapping may be a rhombus obtained by dividing the hexagon into thirds. It can be understood that this embodiment does not limit this, as long as the first grid 301 of the first touch electrode 1 and the first grid 301 of the second touch electrode 2 can overlap to form the second grid 302 .
  • the area of the first grid 301 is an integral multiple of the area of the second grid 302 .
  • a first grid 301 can be divided into four second grids 302 with the same shape and the same size, that is, the area of the first grid 301 is four times the area of the second grid 302 .
  • the area of the first grid 301 may also be three times or five times the area of the second grid 302, etc., and the multiple relationship is not limited here.
  • each second grid 302 in the formed projected grid structure is uniformly arranged, which is beneficial to reduce the occurrence of moiré. Therefore, the influence of moiré on the display effect of the touch display device using the touch substrate is reduced.
  • each first dummy electrode 41 intersects at a first intersection P, which is located at the second grid 302 where it is located. at the center.
  • a design can help the first dummy electrodes to divide the second grid 302 relatively uniformly, thereby further improving the optical uniformity and improving the display effect of the touch display device using the touch substrate.
  • all the line segments in each of the first dummy electrodes 41 also intersect at two intersection points at the same time.
  • FIG. 5B shows a situation where three line segments intersect at two intersection points.
  • all the line segments in each of the first dummy electrodes 41 may also intersect at three intersection points at the same time.
  • FIG. 5C shows the case where four line segments intersect at three intersection points.
  • this embodiment does not limit the number of intersections formed by the intersection of all line segments in the first dummy electrode 41 , as long as it is satisfied that there is no closed area Q as shown in FIG. 4 between all line segments in the first dummy electrode 41 . That's it.
  • this embodiment does not limit the shape of each line segment in the first virtual electrode.
  • the shape of the line segment in the first virtual electrode may be a straight line or a curved line.
  • each of the first dummy electrodes 41 includes two line segments intersecting at the same point, and the two line segments are respectively parallel to the two adjacent lines of the second grid 302 . side.
  • the shape of the second grid 302 includes, but is not limited to, the above-mentioned square, rectangle, or diamond.
  • the first grids 301 in the first touch electrodes 1 and the second touch electrodes 2 are both first rhombus-shaped grids, and each of the first rhombus-shaped grids includes first diagonal directions that are perpendicular to each other. and the second diagonal direction.
  • the first rhombus in the first touch electrode 1 is referred to as the first sub-rhombus 3011
  • the first rhombus in the second touch electrode 2 is referred to as the first rhombus 3011 .
  • first rhombus in the first touch electrode 1 and the first rhombus in the second touch electrode 2 have the same shape and size, that is, the first sub-rhombus 3011 and the second sub-rhombus 3012 Same shape and same size.
  • the two first dummy electrodes 41 in the first touch electrodes 1 are disposed in the first sub-diamond 3011 along the first diagonal direction of the first sub-diamond 3011 (for example, the first Two directions OY) interval setting.
  • the two first dummy electrodes 41 of the second touch electrodes 2 are disposed in the second sub-diamond 3012 along the second diagonal direction of the second sub-diamond 3012 (eg, the first One direction OX) interval setting.
  • the first diagonal line of the first sub-diamond lattice 3011 and the second diagonal line of the second sub-diamond lattice 3012 are spatially perpendicular to each other.
  • a second lattice formed between the orthographic projection of the first sub-diamond lattice 3011 on the substrate and the orthographic projection of the second sub-diamond lattice 3012 on the substrate 302 is a quadrilateral, and the orthographic projection of each first dummy electrode 41 on the substrate can be located in a quadrilateral second grid 302, which is beneficial to improve the optical uniformity of the touch substrate.
  • the second grid 302 is a second rhombus 3021 , and each side of the second rhombus 3021 is connected to the first rhombus (for example, the first sub-rhombus 3011 and the second rhombus 3021 )
  • the sides of the second sub-rhombus 3012) are respectively parallel, and the area of the second diamond 3021 is a quarter of the area of the first diamond.
  • the first grid 301 can be divided into four second grids 302 having the same shape and size, which improves the distribution uniformity of the second grids 302 and further improves the optical uniformity of the touch substrate.
  • each of the first dummy electrodes 41 includes two line segments that intersect at the same point, the centers of the two line segments are located at the center of the second rhombus, and the two line segments are respectively parallel to the two line segments. Describe the two adjacent sides of the second rhombus.
  • the two line segments of the first dummy electrode 41 are both straight line segments, and the first dummy electrode 41 can be divided into four regions with the same shape and the same size in the second grid (ie, the second diamond grid), and then there are It is beneficial to make the touch substrate have better optical uniformity.
  • a pair of opposite angles are both 60 degrees, and the other pair of opposite angles are both 120 degrees.
  • a pair of opposite angles are both 60 degrees, and the other pair of opposite angles are both 120 degrees.
  • the touch substrate 100 further includes: a plurality of first touch electrodes 1 disposed in the same layer as the first touch electrodes 1 and located between two adjacent first touch electrodes 1 .
  • Two dummy electrodes 42 and/or a plurality of third dummy electrodes 43 disposed in the same layer as the second touch electrodes 2 and located between two adjacent second touch electrodes 2 .
  • each second dummy electrode 42 is insulated from the grid structure 30 in the first touch electrode 1
  • each third dummy electrode 42 is insulated from the grid structure 30 in the second touch electrode 2 .
  • the structures 30 are insulated from each other.
  • This arrangement makes it difficult for the human eye to observe the light and dark grid patterns in the area between the two adjacent first touch electrodes 1 and/or the area between the two adjacent second touch electrodes 2 , so that A full-plate design is realized, so that the area between the adjacent two first touch electrodes 1 and the area where the first touch electrodes 1 are located achieve substantially the same optical uniformity, and the adjacent two second touch electrodes The area between 2 and the area where the second touch electrodes 2 are located reach substantially the same optical uniformity.
  • the distance L3 between two adjacent first touch electrodes 1 is 40 ⁇ m ⁇ 50 ⁇ m, for example, the distance between two adjacent first touch electrodes 1 L3 can be 40 ⁇ m, 45 ⁇ m or 50 ⁇ m, etc.
  • the distance L4 between two adjacent second touch electrodes 2 is 40 ⁇ m ⁇ 50 ⁇ m, for example, the distance L4 between two adjacent second touch electrodes 2 may be 40 ⁇ m, 45 ⁇ m or 50 ⁇ m, etc.
  • the widths of the first touch electrodes 1 and/or the second touch electrodes 2 are both several millimeters, for example, 4 mm ⁇ 5 mm.
  • the present embodiment reduces the distance between two adjacent first touch electrodes 1 and/or the distance between two adjacent second touch electrodes 2 , which can improve the touch control substrate.
  • the touch sensitivity of the touch control substrate 100 is improved, and the overall optical uniformity of the touch substrate 100 is further improved.
  • both the shape of the second dummy electrode 42 and the shape of the third dummy electrode 43 may be the same as the shape of the first dummy electrode 41 described above.
  • both the shape of the second dummy electrode 42 and the shape of the third dummy electrode 43 may include two straight line segments that intersect at the same point.
  • the material of the mesh structure 30 in the first touch electrode 1 and the material of the plurality of first dummy electrodes 41 are the same conductive material.
  • the material of the mesh structure 30 in the first touch electrode 2 and the material of the plurality of first dummy electrodes 41 are the same conductive material.
  • the material of the mesh structure 30 is the same as the material of the plurality of first dummy electrodes 41 , the plurality of first touch electrodes 1 or the plurality of second touch electrodes 2 are fabricated.
  • the grid structure 30 and the first dummy electrode 41 can be fabricated in the same process, which simplifies the fabrication process.
  • the material of the second dummy electrode 42 is the same as the material of the first touch electrode 1 , so the second dummy electrode 42 and the first touch electrode 1 can be fabricated in the same process, which simplifies the fabrication craft.
  • the material of the third dummy electrode 43 is the same as that of the second touch electrode 2 , so the third dummy electrode 43 and the first touch electrode 2 can be fabricated in the same process, which simplifies the fabrication process.
  • the material of the grid structure 30 includes at least one of metals such as copper, silver, aluminum, titanium, or nickel
  • the material of the first dummy electrode 41 includes at least one of metals such as copper, silver, aluminum, titanium, or nickel. A sort of.
  • the plurality of first touch electrodes 1 are a plurality of driving electrodes, and the plurality of second touch electrodes 2 are a plurality of sensing electrodes; or, the plurality of first touch electrodes
  • the control electrodes 1 are a plurality of sensing electrodes, and the plurality of second touch electrodes 2 are a plurality of driving electrodes.
  • the touch substrate 100 further includes an insulating layer 3 disposed between the plurality of second touch electrodes and the plurality of first touch electrodes.
  • the plurality of second touch electrodes 1 and the plurality of first touch electrodes 2 are insulated from each other.
  • Some embodiments of the present disclosure provide a touch display device 001 .
  • the touch display device 001 includes the touch substrate 100 as described above. Therefore, the touch display device 001 has All the beneficial effects of the touch substrate 100 as described above.
  • the substrate 10 of the touch substrate 100 is a protective cover 10A.
  • the touch display device 001 further includes a display panel 200A.
  • the touch substrate 100 can be directly disposed on the display side of the display panel 200A (in this case, the first touch electrodes 1 and the second touch electrodes 2 are both located between the protective cover 10A and the display panel 200A), so that protection can be achieved at the same time.
  • the display panel 200A and the purpose of realizing the touch function.
  • the display panel may be a panel having a display function, such as a liquid crystal display panel or an organic light emitting diode display panel.
  • the substrate 10 of the touch substrate 100 is a color filter substrate 10B.
  • the touch display device 001 may include a white light organic light emitting diode display panel 200B, and the touch substrate 100 may be directly disposed on the display side of the white light organic light emitting diode display panel 200B (the first touch electrodes 1 and the second The touch electrodes 2 are all located on the side of the color filter substrate 10B away from the white light organic light emitting diode display panel 200B), so that full-color display and touch functions can be achieved at the same time.
  • the substrate 10 of the touch substrate 100 is an encapsulation layer 10C for encapsulating the display substrate 200C.
  • Each sub-pixel of the above-mentioned display substrate 200C includes a light-emitting device and a driving circuit disposed on the substrate 201 , and the driving circuit includes a plurality of thin film transistors 202 .
  • the light emitting device includes an anode 203, a light emitting functional layer 204 and a cathode 205.
  • the anode 203 is electrically connected to the drain of the thin film transistor 202 serving as a driving transistor among the plurality of thin film transistors 202, so as to drive the light emitting functional layer 204 to emit light through the thin film transistor.
  • the arrangement of the encapsulation layer 10C can prevent the thin film transistor 202 , the anode 203 , the cathode 205 and the organic light-emitting layer 204 between them from being corroded by water and oxygen in the display substrate. Meanwhile, in this embodiment, the encapsulation layer 10C can also serve as the substrate 10 of the touch substrate 100 at the same time.
  • the touch display device 001 may further include a polarizer 206 .
  • the control electrode 1 and the plurality of second touch electrodes 2 are located between the polarizer 206 and the substrate 10 (eg, the encapsulation layer 10C) of the touch substrate 100 .
  • the setting of the polarizer 206 can reduce the reflection effect of the screen, so as to achieve a better display effect.
  • the touch display device 001 may further include an adhesive layer 207 , the adhesive layer 207 is disposed between the polarizer 206 and the touch substrate 100 , and the resistivity of the adhesive layer 207 is 10 8 ⁇ m ⁇ 10 11 ⁇ m.
  • the resistivity of the adhesive layer 207 is 10 8 ⁇ m ⁇ 10 11 ⁇ m.
  • the inventors of the present disclosure have found through research that when the resistivity of the adhesive layer 207 is equal to or close to 10 8 ⁇ m, it is beneficial to make the induced charges on the touch substrate 100 be absorbed more quickly. It is not easy to cause short circuit between the plurality of first touch electrodes 1 on the touch substrate 100 and short circuit between the plurality of second touch electrodes 2 on the touch substrate 100 .
  • the resistivity of the adhesive layer 207 When the resistivity of the adhesive layer 207 is equal to or close to 10 11 ⁇ m, on the basis of better deriving the induced charges, the short circuit phenomenon can be better prevented. Therefore, by setting the resistivity of the adhesive layer 207 to be 10 8 ⁇ m ⁇ 10 11 ⁇ m, the touch sensitivity and display effect can be improved. In some examples, the resistivity of the adhesive layer 207 ranges from 10 9 ⁇ m to 10 10 ⁇ m, which can better balance the effect of induced charge derivation and the risk of short circuit. Wherein, optionally, the adhesive layer 207 may be a PSA (Pressure Sensitive Adhesive, pressure sensitive adhesive) layer.
  • PSA Pressure Sensitive Adhesive, pressure sensitive adhesive
  • support layers can also be provided on opposite sides of the polarizer 206, the support layers can be TAC (Triacetyl Cellulose, triacetyl cellulose) films, and the polarizer 206 can be supported by providing the support layers. Therefore, it is beneficial to prevent the polarizer 206 from being broken.
  • TAC Triacetyl Cellulose, triacetyl cellulose
  • the material of the polarizer 206 may be PVA (Polyvinyl Alcohol, polyvinyl alcohol).
  • the touch display device 001 may also be a liquid crystal display device.
  • the substrate 10 of the touch control substrate 100 is the opposite substrate 10D of the liquid crystal display device.
  • the opposite substrate 10D may also be a color filter substrate.
  • the main structure of the liquid crystal display device includes an array substrate 211 , an opposite substrate 10D, and a liquid crystal 212 therebetween.
  • the plurality of first touch electrodes 1 and the plurality of first touch electrodes 2 of the touch substrate 100 are located on the side of the opposite substrate 10D away from the liquid crystal 212 .
  • the liquid crystal display device further includes a first polarizer 213 disposed on the side of the opposite substrate 10D away from the liquid crystal 212 and a second polarizer disposed on the side of the array substrate 11 away from the liquid crystal 212 214.
  • the first polarizer 213 is located on the side of the plurality of first touch electrodes 1 and the plurality of first touch electrodes 2 of the touch substrate 100 away from the opposite substrate 10D.
  • the first polarizer 213 and the second polarizer 214 can be made of the same material as the above-mentioned polarizer 206 .
  • the above-mentioned supporting layers may also be provided on the opposite sides of the first polarizer 213 and on the opposite sides of the second polarizer 214, respectively.
  • the beneficial effect that can be achieved by setting the support layer here is the same as the content described above, so it is not repeated here.
  • the above-mentioned adhesive layer 207 may also be disposed between the first polarizer 213 of the liquid crystal display device and the touch substrate 100 .
  • the effect that can be achieved by setting the adhesive layer 207 here is the same as the content described above, so it is not repeated here.
  • the touch display device 001 is an external touch (On Cell Touch) display device, an embedded touch (In Cell Touch) display device, or an integrated touch (OGS, One Touch) display device. glass solution) display device.
  • the touch display device 001 is any device that displays images whether moving (eg, video) or stationary (eg, still images) and whether text or drawing. More specifically, it is contemplated that the embodiments may be implemented in or associated with a wide variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs) , handheld or portable computers, GPS receivers/navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, TV monitors, flat panel monitors, computer monitors, automotive monitors (e.g., odometer displays, etc.), navigators, cockpit controls and/or displays, displays of camera views (eg, displays of rear-view cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, building structures, packaging and aesthetic structures (eg, a display for an image of a piece of jewelry), etc.
  • PDAs personal data assistants
  • handheld or portable computers GPS receivers/navigators
  • MP4 video players camcorders
  • Some embodiments of the present disclosure also provide a method for fabricating the touch substrate 100 , referring to FIGS. 1A , 6 and 8 , the fabrication method includes:
  • each of the first touch electrodes 1 includes a grid structure 30 and a plurality of first dummy electrodes 41 .
  • the grid structure 30 has a plurality of first grids 301 , each of the first grids 301 is provided with at least one first dummy electrode 41 , and each first dummy electrode 41 is electrically insulated from the first grid 301 where it is located.
  • the specific fabrication process for forming the first touch electrodes 1 is not limited.
  • a first conductive film is first formed on one side of the substrate 10 , and then a patterning process is performed on the first conductive film to form the plurality of first touch electrodes 1 .
  • the patterning process includes steps such as coating photoresist, exposing, developing, etching, and cleaning.
  • the film layers formed on the substrate 10 are not limited.
  • a black matrix pattern Black Matrix, BM for short may be formed on the substrate 10 .
  • a first protective layer (Over Coat, OC for short) is formed on one side of the substrate 10, and then a first protective layer (OC) is formed on one side of the substrate 10.
  • the plurality of first touch electrodes 1 are formed on the side facing away from the substrate 10 .
  • the first protective layer can play the role of protecting the substrate 10.
  • the material of the insulating layer 3 is not limited.
  • the material of the insulating layer 3 is at least one of silicon nitride, silicon oxide or silicon oxynitride.
  • each second touch electrode 2 includes a grid structure 30 and a plurality of first dummy electrodes 41 .
  • the grid structure 30 has a plurality of first grids 301 , each of the first grids 301 is provided with at least one first dummy electrode 41 , and each first dummy electrode 41 is electrically insulated from the first grid 301 where it is located.
  • the specific fabrication process for forming the plurality of second touch electrodes 2 is not limited.
  • a second conductive film is first formed on the insulating layer 3 , and then a patterning process is performed on the second conductive film to form the plurality of second touch electrodes 2 .
  • the patterning process includes steps such as coating photoresist, exposing, developing, etching, and cleaning.
  • the orthographic projections of the plurality of first touch electrodes 1 on the substrate 10 are lined with the plurality of second touch electrodes 2
  • the orthographic projections of the bases 10 intersect to form a plurality of intersecting regions A.
  • the orthographic projection of the grid structures 30 in the first touch electrodes 1 on the substrate 10 and the orthographic projection of the grid structures 30 in the second touch electrodes 2 on the substrate 10 form a projection grid lattice structure.
  • the projection grid structure has a plurality of second grids 302, the orthographic projection of each first dummy electrode 41 on the substrate 10 is located in one of the second grids 302, and the orthographic projection of each first dummy electrode 41 on the substrate 10 includes At least two line segments, the at least two line segments are crossed, and there is no closed area between the at least two line segments.
  • the first dummy electrode in this embodiment may be the first dummy electrode 41 shown in FIG. 2A , FIG. 2B , and FIG. 3A ; for example, the first dummy electrode in this embodiment may also be as shown in FIGS. 5A to 5A .
  • the first dummy electrode 41 shown in 5C In this way, compared with the first dummy electrode shown in FIG. 4 , the charge on the first dummy electrode provided in this embodiment is easier to derive, so that the above-mentioned screen is less likely to appear bright and dark during touch.
  • the phenomenon of grid pattern is used to derive.

Abstract

一种触控基板，包括：衬底；设置于所述衬底上的多条第一触控电极，多条第一触控电极沿第一方向延伸；以及，设置于所述衬底上的多条第二触控电极，多条第二触控电极沿与第一方向交叉的第二方向延伸，并且多条第二触控电极与多条第一触控电极之间相互绝缘。其中，每条第一触控电极和每条第二触控电极中均包括网格结构和多个第一虚拟电极；每个所述第一虚拟电极在所述衬底的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。

Description

触控基板及触控显示装置
本申请要求于2020年06月29日提交的、申请号为202010605969.7的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开实施例涉及一种触控基板及触控显示装置。
背景技术
在触控显示装置中，金属网格结构(Metal Mesh)的触控电极具有信号传递速度快等有益性能，正逐渐被接受和推广应用。
发明内容
一方面，提供一种触控基板。所述触控基板包括：衬底；设置于所述衬底上的多条第一触控电极，多条第一触控电极沿第一方向延伸；以及，设置于所述衬底上的多条第二触控电极，多条第二触控电极沿与所述第一方向交叉的第二方向延伸，并且多条第二触控电极与多条第一触控电极之间相互绝缘。其中，每条第一触控电极和每条第二触控电极中均包括网格结构和多个第一虚拟电极；所述网格结构包括多个第一格，每个第一格中设置有至少一个第一虚拟电极，且每个第一虚拟电极与其所在的第一格之间相互绝缘；多条第一触控电极在所述衬底的正投影与多条第二触控电极在所述衬底的正投影交叉，形成多个交叉区域；在每个交叉区域内，所述第一触控电极中的网格结构在所述衬底的正投影与所述第二触控电极中的网格结构在所述衬底的正投影形成投影网格结构；所述投影网格结构具有多个第二格，每个所述第一虚拟电极在所述衬底的正投影位于一个所述第二格中，且每个所述第一虚拟电极在所述衬底的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。
在一些实施例中，所述第一虚拟电极和其所在的第一格的边缘之间留有设定间距。
在一些实施例中，所述设定间距为4μm～12μm。
在一些实施例中，每个所述第二格包括：第一边缘，所述第一边缘为所述第一触控电极中的网格结构在所述衬底的部分正投影；第二边缘，所述第二边缘为所述第二触控电极中的网格结构在所述衬底的部分正投影。其中，所述第一触控电极中的第一虚拟电极在所述衬底的正投影与该第一虚拟电极所在的第二格的第二边缘彼此相连或者彼此部分地重叠；和/或，所述第二触控电极中的第一虚拟电极在所述衬底的正投影与该第一虚拟电极所在的第二 格的第一边缘彼此相连或者彼此部分地重叠。
在一些实施例中，所述第一格的形状为正方形、长方向、菱形或正六边形；所述第二格的形状为正方形、长方形或菱形。
在一些实施例中，所述第一格的面积是所述第二格的面积的整数倍。
在一些实施例中，每个所述第一虚拟电极中的至少两条线段相交于第一交点，所述第一交点位于其所在的第二格的中心处。
在一些实施例中，每个所述第一虚拟电极中包括相交于同一点的两条线段，所述两条线段分别平行于所述第二格的两条邻边。
在一些实施例中，所述第一触控电极中的第一格和所述第二触控电极中的第一格均为第一菱形格；所述第一触控电极中的两个第一虚拟电极设置于所述第一触控电极中的一个第一菱形格中，且沿该第一菱形格的第一对角线方向间隔设置；所述第二触控电极中的两个第一虚拟电极设置于所述第二触控电极中的一个第一菱形格中，且沿该第一菱形格的第二对角线方向间隔设置；其中，所述第一触控电极中的第一菱形格的第一对角线与所述第二触控电极中的第一菱形格的第二对角线在空间上相互垂直。
在一些实施例中，所述第二格为第二菱形格，所述第二菱形格的各个边与所述第一菱形格的各个边分别平行，且所述第二菱形格的面积为所述第一菱形格的面积的四分之一。
在一些实施例中，每个所述第一虚拟电极中包括相交于同一点的两条线段，所述两条线段的中心位于所述第二菱形格的中心处，并且所述两条线段分别平行于所述第二菱形格的两条邻边。
在一些实施例中，所述触控基板还包括：与所述第一触控电极同层设置、且位于相邻两条所述第一触控电极之间的多个第二虚拟电极；和/或，与所述第二触控电极同层设置、且位于相邻两条所述第二触控电极之间的多个第三虚拟电极。
在一些实施例中，相邻两条所述第一触控电极之间的间距为40μm～50μm；和/或，相邻两条所述第二触控电极之间的间距为40μm～50μm。
在一些实施例中，所述多条第一触控电极为多条驱动电极，所述多条第二触控电极为多条感应电极；或者，所述多条第一触控电极为多条感应电极，所述多条第二触控电极为多条驱动电极。
在一些实施例中，触控基板还包括：绝缘层，设置于所述多条第二触控电极和所述多条第一触控电极之间，以使所述多条第二触控电极与所述多条第一触控电极之间相互绝缘。
另一方面，提供一种触控显示装置。所述触控显示装置包括：如上述任一项实施例所述的触控基板。
在一些实施例中，所述触控基板的衬底为保护盖板；或者，所述触控基板的衬底为彩膜基板；或者，所述触控基板的衬底为用于封装显示基板的封装层。
在一些实施例中，所述触控显示装置为液晶显示装置，所述液晶显示装置包括对盒设置的阵列基板和对置基板、以及位于二者之间的液晶；所述触控基板的衬底为所述对置基板，所述触控基板的多条第一触控电极和多条第二触控电极位于所述对置基板远离所述液晶的一侧。
在一些实施例中，所述触控显示装置还包括：偏光片，设置于所述触控基板的多条第一触控电极和多条第二触控电极远离所述触控基板的衬底一侧。
在一些实施例中，所述触控显示装置还包括：胶层，设置于所述偏光片与所述触控基板之间；所述胶层的电阻率为10 8Ω·m～10 11Ω·m。
附图说明
为了更清楚地说明本公开中的技术方案，下面将对本公开一些实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本公开实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
图1A为根据一些实施例的一种触控基板的结构图；
图1B为根据一些实施例的另一种触控基板的结构图；
图2A为根据一些实施例的一种第一触控电极的结构图；
图2B为根据一些实施例的一种第二触控电极的结构图；
图3A为根据一些实施例的一种第一触控电极与第二触控电极之间交叠区域的结构图；
图3B为根据一些实施例的另一种第一触控电极与第二触控电极之间交叠区域的结构图；
图3C为根据一些实施例的再一种第一触控电极与第二触控电极之间交叠区域的结构图；
图3D为图1B中的触控基板在U位置处的结构放大图；
图4为根据一些实施例的一种第一虚拟电极的结构图；
图5A为根据一些实施例的另一种第一虚拟电极的结构图；
图5B为根据一些实施例的再一种第一虚拟电极的结构图；
图5C为根据一些实施例的又一种第一虚拟电极的结构图；
图6为根据一些实施例的一种触控基板的截面图；
图7A为根据一些实施例的一种触控显示装置的截面图；
图7B为根据一些实施例的另一种触控显示装置的截面图；
图7C为根据一些实施例的又一种触控显示装置的截面图；
图7D为根据一些实施例的又一种触控显示装置的截面图；
图7E为根据一些实施例的又一种触控显示装置的截面图；
图8为根据一些实施例的一种触控基板的制作方法的流程图。
具体实施方式
下面将结合附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
“A、B和C中的至少一个”与“A、B或C中的至少一个”具有相同含义，均包括以下A、B和C的组合：仅A，仅B，仅C，A和B的组合，A和C的组合，B和C的组合，及A、B和C的组合。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
本文中“适用于”或“被配置为”的使用意味着开放和包容性的语言，其不排除适用于或被配置为执行额外任务或步骤的设备。
本公开的一些实施例提供了一种触控基板100。如图1A所示，该触控基板包括衬底10，以及设置于衬底10上的多条第一触控电极1和多条第二触控电极2。多条第一触控电极1沿第一方向OX延伸，多条第二触控电极2沿第二方向OY延伸，并且多条第二触控电极2与多条第一触控电极1之间相互绝缘。其中，第一方向OX与第二方向OY相互交叉，例如第一方向OX可以与第二方向OY彼此垂直。
如图2A和图2B所示，每条第一触控电极1和每条第二触控电极2中均包括网格结构30和多个第一虚拟电极41。其中，网格结构30由多条导线(例如图2A中的多条第一导线31和多条第二导线32，或者，图2B中的多条第一导线31和多条第二导线32)交叉排布形成，该多条导线可以用于传输电信号。
网格结构30包括多个第一格301，在每个第一格301中设置有至少一个第一虚拟电极41(例如图2A和图2B均以每个第一格301中设置两个第一虚拟电极41为例进行示意，可以理解，本实施例及相应附图并不对该第一格301中第一虚拟电极的数量进行限制)，每个第一虚拟电极41与其所在的第一格301之间相互绝缘。
如图1A和图3A所示，所述多条第一触控电极1在衬底10的正投影与所述多条第二触控电极2在衬底10的正投影交叉，形成多个交叉区域A。在每个交叉区域A内，第一触控电极1中的网格结构30在衬底10的正投影与第二触控电极2中的网格结构30在衬底10的正投影形成投影网格结构。投影网格结构具有多个第二格302，每个第一虚拟电极41在衬底10的正投影位于一个第二格302中，且每个第一虚拟电极41在衬底10的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。
其中，参见图3A，在每个交叉区域A内，存在第一触控电极1的多条导线的正投影与第二触控电极2的多条导线的正投影重叠的多个重叠区域C，由于第一触控电极1的每条导线和第二触控电极2的每条导线之间电绝缘，因此在每个重叠区域C处会产生一个由相应的两条导线形成的互感电容。此处，值得指出的是，在一些相关技术中，每条第一触控电极1和每条第二触控电极2的导线设置密度通常较大，因此在每个交叉区域A内存在较多的重 叠区域C，导致第一触控电极1和第二触控电极2之间产生较大的互感电容值，进而造成采用该触控基板的触控显示装置中触控电路的电阻电容延时严重，降低了触控显示装置的信号传递速度。基于此，在另一些相关技术中，通过增大每条第一触控电极1中每个第一格301的尺寸和每条第二触控电极2中每个第一格301的尺寸，使每个交叉区域A内的第一触控电极1和第二触控电极2的导线设置密度降低。然而，在每个第一格301的尺寸设置的较大情况下，会导致人眼能够分辨出每个第一格301。尤其是在所述多个交叉区域A以外的非交叉区域(例如图1A示出的非交叉区域D)中，该第一格301更加容易被人眼所察觉到。继而在使用触控显示装置时能够察觉到多条第一触控电极1和多条第二触控电极2的存在，降低了触控显示装置的显示效果。
而本实施例提供的触控基板，由于所述多条第一触控电极1和所述多条第二触控电极2的第一格301中均设置有第一虚拟电极41，每个第一虚拟电极与其所在的第一格301相互绝缘，也即每个第一虚拟电极中无电信号传输，因此所述多条第一触控电极1和所述多条第二触控电极2的用于传输电信号的导线的设置密度较低(例如，参见图3A，第一触控电极1中相邻的两条导线之间的间距L1由相关技术中的100μm～200μm增大至300μm～400μm，第二触控电极2中相邻的两条导线之间的间距L2由相关技术中的100μm～200μm增大至300μm～400μm)，也就是说，第一触控电极1和第二触控电极2之间所产生的互感电容值较低，从而能够改善触控显示装置中触控电路的电阻电容延时情况，提高了触控显示装置的信号传递速度。
同时，由于所述多条第一触控电极1和所述多条第二触控电极2的第一格301中均设置第一虚拟电极41，且在交叠区域A内，每个第一虚拟电极41在衬底10的正投影位于一个第二格302中，这使得第一格301及第二格302内被划分为多个尺寸更小的区域，进而使得第一格301及第二格302不易被人眼观察到，也即能够避免人眼察觉到触控基板100中的所述多条第一触控电极1和所述多条第二触控电极2的存在，保证了触控显示装置的显示效果。
其中，第一格301的尺寸指的是第一格301的对边之间的最大距离，第二格302的尺寸指的是第二格302的对边之间的最大距离。
图4示出了一些实施例中的第一虚拟电极41。如图4所示，该第一虚拟电极41中具有封闭区域Q。然而，本公开发明人经研究发现：在对具有该触控基板的触控显示装置进行触摸操作时，所述多条第一触控电极1和所述多条第二触控电极2中的网格结构30及第一虚拟电极41上容易积聚电荷。其中网格结构30上的电荷容易导出，但是第一虚拟电极41多为相互孤立的如 图4所示的菱形结构，这导致第一虚拟电极41上的感应电荷不容易消散。而二者(即网格结构30和第一虚拟电极41)的电荷差异会导致整个显示区域的电场分布不均，进而会导致触控显示装置的整个屏幕在触控时显现出明暗相间的网格纹。
例如，对于液晶触控显示装置而言，尤其是对于无盖板玻璃的On-cell产品(也即将上述第一触控电极1和第二触控电极2均设置于液晶盒外，且在第一触控电极1和第二触控电极2远离液晶盒一侧只设置有偏光片，而并不在偏光片上继续设置盖板玻璃的显示装置；其中，液晶盒主要包括对盒设置的阵列基板和对置基板，以及位于两者之间的液晶)而言，在正常情况下，偏光片、触控基板及液晶盒内离子处于平衡状态，正负电荷分布均匀，显示画面均一。
而当手指或手套与偏光片摩擦时，则很容易产生电荷，从而使得偏光片发生极化，正负电荷分布平衡被打破，随后，触控基板感应出相应的电荷和极化。此时，第一触控电极和第二触控电极中的网格结构完整且连通，感应电荷容易导出，但第一虚拟电极为封闭图像，如图4所示的菱形结构，其构造导致其上的电荷不容易消散。因此，二者的差异最终会导致下方液晶盒内离子平衡状态破坏，对液晶盒内电场分布造成影响，导致液晶偏转发生变化。而变化区域与无变化区域的显示效果存在差异，所以会导致液晶触控显示装置的整个屏幕在触控时显现出明暗相间的网格纹。
而本实施例提供的触控基板中，每个第一虚拟电极41在衬底10的正投影位于一个第二格302中，每个第一虚拟电极41在衬底10的正投影位于一个第二格302中，且每个第一虚拟电极41在衬底10的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。例如，本实施例中的第一虚拟电极可以为图2A、图2B和图3A示出的第一虚拟电极41；又例如，本实施例中的第一虚拟电极还可以为如图5A～图5C示出的第一虚拟电极41。这样设计，相较于图4示出的第一虚拟电极而言，本实施例提供的第一虚拟电极上的电荷更容易导出，从而不容易出现如上所述的屏幕在触控时显现出明暗相间的网格纹的现象。
在一些实施例中，所述第一虚拟电极41与其所在的第一格301的边缘之间留有设定间距。这使得第一虚拟电极41与其所在的第一格301之间可以相互绝缘。
示例性的，该设定间距为4μm～12μm，例如该设定间距可以4μm、8μm或12μm等。此时，人眼不容易看到第一虚拟电极41和其所在的第一格301 之间的缺口，提高了触控基板100的光学均匀性，同时，能够有效的防止第一虚拟电极41和其所在的第一格301之间发生短路。可以理解，本实施例中，当该设定间距等于或接近4μm时，能够使人眼更不容易看到缺口，进一步提高触控基板100的光学均匀性。而在设定间距等于或接近8μm时，则能够更有效的防止第一虚拟电极和其所在的第一格301之间发生短路现象。
在一些实施例中，参见图3A～图3C，每个所述第二格302包括第一边缘b1和第二边缘b2。其中，第一边缘b1为第一触控电极1中的网格结构30在衬底的部分正投影；第二边缘b2为第二触控电极2中的网格结构30在衬底的部分正投影。第一触控电极1中的第一虚拟电极41在衬底的正投影与该第一虚拟电极41所在的第二格302的第二边缘b2彼此相连或者彼此部分地重叠；和/或，第二触控电极2中的第一虚拟电极41在衬底的正投影与该第一虚拟电极41所在的第二格302的第一边缘b1彼此相连或者彼此部分地重叠。
本实施例中，通过第一触控电极1中的第一虚拟电极41在衬底的正投影与该第一虚拟电极41所在的第二格302的第二边缘b2彼此相连或者彼此部分地重叠，使得在第一触控电极1远离衬底的一侧，看到的第一触控电极1中的第一虚拟电极41和该第一虚拟电极41所在的第二格302的第二边缘b2是相连的，也即这两者之间不存在缺口，从而能够减少缺口数量，提高光学均匀性，避免因缺口太多而造成明暗相间分布的情况。
通过第二触控电极2中的第一虚拟电极41在衬底的正投影与该第一虚拟电极41所在的第二格302的第一边缘b1彼此相连或者彼此部分地重叠，使得在第二触控电极2远离衬底的一侧，看到的第二触控电极2中的第一虚拟电极41和该第一虚拟电极41所在的第二格302的第一边缘b1是相连的，也即这两者之间不存在缺口，从而能够进一步减少缺口数量，提高光学均匀性，避免因缺口太多而造成明暗相间分布的情况。
上述第一格301的形状可以为正方形、长方形、菱形或正六边形；相应的，上述第二格302的形状可以为正方向、长方形或菱形。例如，在第一格301的形状为正方形时，交叠形成的第二格302可以为形状相同、大小不同的正方形；又例如，在在第一格301的形状为长方形时，交叠形成的第二格302可以为形状相同、大小不同的长方形；又例如，如图3A～图3C所示，在第一格301的形状为菱形时，交叠形成的第二格302可以为形状相同、大小不同的菱形；又例如，在第一格301的形状为六边形时，交叠形成的第二格302的形状可以为将该六边形进行三等分后得到的菱形形状。可以理解，本实施例并不对此进行限制，只要满足第一触控电极1的第一格301和第二触控电 极2的第一格301可以交叠形成第二格302即可。
在一些实施例中，第一格301的面积是第二格302的面积的整数倍。例如，可以如图3A～图3C所示，将一个第一格301分为四个形状相同且大小相等第二格302，也即第一格301的面积是第二格302的面积的四倍。当然，在另一些示例中，该第一格301的面积也可以是第二格302的面积的三倍或五倍等，此处并不对倍数关系进行限制。
本实施例中，通过设置第一格301的面积是第二格302的面积的整数倍，使得所形成的投影网格结构中的每个第二格302为均匀排列，有利于减少摩尔纹的产生，从而降低了摩尔纹对采用该触控基板的触控显示装置的显示效果的影响。
在一些实施例中，参见图3A～3C、以及图5A，每个第一虚拟电极41中的至少两条线段相交于第一交点P，该第一交点P位于其所在的第二格302的中心处。这样设计，可以利于第一虚拟电极对第二格302进行比较均匀的分割，从而有利于进一步提高光学均匀性，提高采用该触控基板的触控显示装置的显示效果。
此外，在另一些示例中，参见图5B，上述每个第一虚拟电极41中所有线段也同时相交于两个交点，例如图5B示出了三条线段相交于两个交点的情况。在又一些示例中，参见图5C，上述每个第一虚拟电极41中所有线段也可以同时相交于三个交点，例如图5C中示出了四条线段相交于三个交点的情况。可以理解的是，本实施例并不对第一虚拟电极41中所有线段相交形成的交点个数进行限定，只要满足第一虚拟电极41中所有线段之间不存在如图4所示的封闭区域Q即可。另外，本实施例也并不对第一虚拟电极中各线段的形状进行限定，例如该第一虚拟电极中线段的形状可以是直线，也可以是曲线。
在本公开的一些实施例中，参见图3A～图3C，每个第一虚拟电极41中包括相交于同一点的两条线段，所述两条线段分别平行于第二格302的两条邻边。这样能够比较均匀的分隔第二格302内的区域，从而提高触控基板的光学均匀性。其中，第二格302的形状包括但不限于如上所述的正方形、长方形或菱形等。
在一些实施例中，第一触控电极1和所述第二触控电极2中的第一格301均为第一菱形格，每个第一菱形格包括相互垂直的第一对角线方向和第二对角线方向。参见图2A和图2B，本文中，为了方便说明，将第一触控电极1中的第一菱形格称为第一子菱形格3011，并将第二触控电极2中的第一菱形 格称为第二子菱形格3012。可以理解，第一触控电极1中的第一菱形格和第二触控电极2中的第一菱形格形状相同、大小相等，也即该第一子菱形格3011和第二子菱形格3012形状相同、大小相等。
如图2A所示，第一触控电极1中的两个第一虚拟电极41设置于第一子菱形格3011中，且沿该第一子菱形格3011的第一对角线方向(例如第二方向OY)间隔设置。如图2B所示，第二触控电极2中的两个第一虚拟电极41设置于第二子菱形格3012中，且沿该第二子菱形格3012的第二对角线方向(例如第一方向OX)间隔设置。同时，参见图3A，第一子菱形格3011的第一对角线与第二子菱形格3012的第二对角线在空间上相互垂直。通过上述设计方案，使得在如图3A所示的交叉区域A内，第一子菱形格3011在衬底的正投影与第二子菱形格3012在衬底的正投影之间形成的第二格302为四边形，并能够使每个第一虚拟电极41在衬底的正投影位于一个呈四边形的第二格302中，进而有利于提高触控基板的光学均匀性。
在此基础上，示例性的，参见图3A，第二格302为第二菱形格3021，所述第二菱形格3021的各个边与所述第一菱形格(例如第一子菱形格3011和第二子菱形格3012)的各个边分别平行，且所述第二菱形格3021的面积为所述第一菱形格的面积的四分之一。这样设置，可以将第一格301划分为形状相同且大小相等的四个第二格302，提高了第二格302的分布均匀性，进而有利于进一步提高触控基板的光学均匀性。
示例性的，每个第一虚拟电极41中包括相交于同一点的两条线段，所述两条线段的中心位于所述第二菱形格的中心处，并且所述两条线段分别平行于所述第二菱形格的两条邻边。此时，第一虚拟电极41的两条线段均为直线段，并且第一虚拟电极41可以在第二格(即第二菱形格)内分隔出形状相同且大小相等的四个区域，进而有利于使触控基板具有更好的光学均匀性。
示例性的，第一菱形格中一对相对的夹角均为60度，另一对相对的夹角均为120度。相应的，第二菱形格中一对相对的夹角均为60度，另一对相对的夹角均为120度。
在一些实施例中，参见图1B和图3D，该触控基板100还包括：与第一触控电极1同层设置、且位于相邻两条第一触控电极1之间的多个第二虚拟电极42；和/或，与第二触控电极2同层设置、且位于相邻两条第二触控电极2之间的多个第三虚拟电极43。其中，可以理解的是，每个第二虚拟电极42与第一触控电极1中的网格结构30之间相互绝缘，每个第三虚拟电极42与第二触控电极2中的网格结构30之间相互绝缘。
这样设置，使得人眼不容易在相邻两条第一触控电极1之间的区域和/或相邻两条第二触控电极2之间的区域观察到明暗相间的网格纹，从而实现了满版设计，使得相邻两条第一触控电极1之间的区域与第一触控电极1所在的区域达到基本相同的光学均匀性，并使得相邻两条第二触控电极2之间的区域与第二触控电极2所在的区域达到基本相同的光学均匀性。
示例性的，参见图1B和图3D，相邻两条所述第一触控电极1之间的间距L3为40μm～50μm，例如相邻两条所述第一触控电极1之间的间距L3可以为40μm、45μm或50μm等。和/或，相邻两条所述第二触控电极2之间的间距L4为40μm～50μm，例如相邻两条所述第二触控电极2之间的间距L4可以为40μm、45μm或50μm等。此处，值得指出的是，相关技术中，第一触控电极1和/或第二触控电极2的宽度均为几毫米，例如4mm～5mm。本实施例相较相关技术而言，缩小了相邻两条第一触控电极1之间的间距和/或相邻两条第二触控电极2之间的间距，这样能够提高触控基板100的触控灵敏度，并且有利于进一步提高触控基板100的整体光学均匀性。
其中，参见图3D，需要说明的是，相邻两条第一触控电极1之间的区域和相邻两条第二触控电极2之间的区域存在重叠部分，该重叠部分内可以设置第二虚拟电极42，或者也可以设置第三虚拟电极43(如图3D所示)。
此外，第二虚拟电极42的形状和第三虚拟电极43的形状均可以与上述第一虚拟电极41的形状相同。例如，在图3D中，第二虚拟电极42的形状和第三虚拟电极43的形状均可以包括相交于同一点的两条直线段。
在本公开的一些实施例中，第一触控电极1中网格结构30的材料和多个第一虚拟电极41的材料为相同的导电材料。第一触控电极2中网格结构30的材料和多个第一虚拟电极41的材料为相同的导电材料。
在此情况下，由于网格结构30的材料和所述多个第一虚拟电极41的材料相同，因而在制作所述多条第一触控电极1或所述多条第二触控电极2时，能够在同一工序中制作网格结构30和第一虚拟电极41，简化了制作工艺。
在此基础上，示例性的，第二虚拟电极42的材料与第一触控电极1的材料相同，因此能够在同一工序中制作第二虚拟电极42和第一触控电极1，简化了制作工艺。
示例性的，第三虚拟电极43的材料与第二触控电极2的材料相同，因此能够在同一工序中制作第三虚拟电极43和第一触控电极2，简化了制作工艺。
示例性的，网格结构30的材料包括铜、银、铝、钛或者镍等金属中的至少一种，第一虚拟电极41的材料包括铜、银、铝、钛或者镍等金属中的至少 一种。
在本公开的一些实施例中，所述多条第一触控电极1为多条驱动电极，所述多条第二触控电极2为多条感应电极；或者，所述多条第一触控电极1为多条感应电极，所述多条第二触控电极2为多条驱动电极。
示例性的，如图6所示，触控基板100还包括设置于所述多条第二触控电极和所述多条第一触控电极之间的绝缘层3，绝缘层3可以使所述多条第二触控电极1与所述多条第一触控电极2之间相互绝缘。
本公开的一些实施例提供了一种触控显示装置001，如图7A～图7E所示，该触控显示装置001包括如上所述的触控基板100，因此，该触控显示装置001具有如上所述的触控基板100的全部有益效果。
示例性的，如图7A所示，该触控基板100的衬底10为保护盖板10A。此时，该触控显示装置001还包括显示面板200A。该触控基板100可以直接设置于显示面板200A的显示侧(此时第一触控电极1和第二触控电极2均位于保护盖板10A与显示面板200A之间)，从而可以同时达到保护该显示面板200A以及实现触控功能的目的。其中，该显示面板可以为液晶显示面板或有机发光二极管显示面板等具有显示功能的面板。
又示例性的，如图7B所示，该触控基板100的衬底10为彩膜基板10B。此时，该触控显示装置001可以包括白光有机发光二极管显示面板200B，该触控基板100可以直接设置于白光有机发光二极管显示面板200B的显示侧(此时第一触控电极1和第二触控电极2均位于彩膜基板10B远离白光有机发光二极管显示面板200B的一侧)，从而可以同时达到全彩显示以及实现触控功能的目的。
又示例性的，如图7C所示，触控基板100的衬底10为用于封装显示基板200C的封装层10C。上述显示基板200C的每个亚像素包括设置在基底201上的发光器件和驱动电路，驱动电路包括多个薄膜晶体管202。发光器件包括阳极203、发光功能层204以及阴极205，阳极203和多个薄膜晶体管202中作为驱动晶体管的薄膜晶体管202的漏极电连接，以通过薄膜晶体管驱动发光功能层204发光。而封装层10C的设置可以防止显示基板中的薄膜晶体管202、阳极203、阴极205以及二者之间的有机发光层204受到水氧的侵蚀。同时，本实施例中，封装层10C还可以同时作为触控基板100的衬底10。
在图7C示出的触控显示装置001的基础上，示例性的，参见图7D，该触控显示装置001还可以包括偏光片206，此时，触控基板100中的多条第一触控电极1和多条第二触控电极2位于该偏光片206与触控基板100的衬底 10(例如封装层10C)之间。在该实施例中，偏光片206的设置可以减弱屏幕反光效果，从而达到更好的显示效果。
示例性的，如图7D所示，该触控显示装置001还可以包括胶层207，该胶层207设置于偏光片206与触控基板100之间，并且该胶层207的电阻率为10 8Ω·m～10 11Ω·m。此处，值得说明的是，本公开发明人经研究发现，在胶层207的电阻率等于或趋近于10 8Ω·m时，有利于使触控基板100上的感应电荷更快地被导出，并且触控基板100上的多条第一触控电极1之间不容易发生短路，触控基板100上的多条第二触控电极2之间也不容易发生短路。而当该胶层207的电阻率等于或趋近于10 11Ω·m时，则能够在较好的导出感应电荷的基础上，更好的防止发生短路现象。因此，通过设置该胶层207的电阻率为10 8Ω·m～10 11Ω·m，可以提高触控灵敏度和显示效果。在一些示例中，该胶层207的电阻率为10 9Ω·m～10 10Ω·m，这样设置，可以更好的平衡感应电荷的导出效果与发生短路的风险。其中，可选的，该胶层207可以为PSA(Pressure Sensitive Adhesive，压敏胶)层。
其中，可选的，还可以在偏光片206的相对两侧分别设置支持层，该支持层可以为TAC(Triacetyl Cellulose，三醋酸纤维素)薄膜，通过设置支持层可以对偏光片206进行支撑，从而有利于防止偏光片206发生断裂。
可选的，偏光片206的材料可以为PVA(Polyvinyl Alcohol，聚乙烯醇)。
在一些实施例中，所述触控显示装置001还可以为液晶显示装置，此时，所述触控基板100的衬底10为液晶显示装置的对置基板10D。同时，在一些示例中，该对置基板10D还可以是彩膜基板。
其中，如图7E所示，该液晶显示装置的主要结构包括阵列基板211、对置基板10D以及二者之间的液晶212。其中，触控基板100的多条第一触控电极1和多条第一触控电极2均位于对置基板10D远离液晶212的一侧。
在此基础上，如图7E所示，该液晶显示装置还包括设置在对置基板10D远离液晶212一侧的第一偏光片213以及设置在阵列基板11远离液晶212一侧的第二偏光片214。此时，第一偏光片213位于触控基板100的多条第一触控电极1和多条第一触控电极2远离对置基板10D一侧。
其中，第一偏光片213和第二偏光片214可以选用与上述偏光片206相同的材料。同时，也可以在第一偏光片213的相对两侧、以及第二偏光片214的相对两侧分别设置如上所述的支持层。此处设置支持层所能达到的有益效果与上面描述的内容相同，因此不在赘述。
基于此，示例性的，如图7E所示，还可以在液晶显示装置的第一偏光片 213与触控基板100之间设置如上所述的胶层207。此处设置胶层207所能达到的效果与上面描述的内容相同，因此也不在赘述。
示例性的，本公开的实施例所提供的触控显示装置001为外置式触控(On cell Touch)显示装置、嵌入式触控(In Cell Touch)显示装置或者一体化触控(OGS，One glass solution)显示装置中的一种。
示例性的，触控显示装置001为显示不论运动(例如，视频)还是固定(例如，静止图像)的且不论文字还是图画的图像的任何装置。更明确地说，预期所述实施例可实施在多种电子装置中或与多种电子装置关联，所述多种电子装置例如(但不限于)移动电话、无线装置、个人数据助理(PDA)、手持式或便携式计算机、GPS接收器/导航器、相机、MP4视频播放器、摄像机、游戏控制台、手表、时钟、计算器、电视监视器、平板显示器、计算机监视器、汽车显示器(例如，里程表显示器等)、导航仪、座舱控制器和/或显示器、相机视图的显示器(例如，车辆中后视相机的显示器)、电子相片、电子广告牌或指示牌、投影仪、建筑结构、包装和美学结构(例如，对于一件珠宝的图像的显示器)等。
本公开的一些实施例还提供一种触控基板100的制作方法，参见图1A、图6和图8，该制作方法包括：
S101、在衬底10上形成多条第一触控电极1，多条第一触控电极1沿第一方向OX延伸。
其中，如图2A所示，每条第一触控电极1包括网格结构30和多个第一虚拟电极41。网格结构30具有多个第一格301，每个第一格301中设置有至少一个第一虚拟电极41，且每个第一虚拟电极41与其所在的第一格301电绝缘。
在此，对于形成第一触控电极1的具体制作工艺不进行限定。在一些实施例中，先在衬底10的一侧上形成第一导电薄膜，而后对该第一导电薄膜进行构图工艺，以形成所述多条第一触控电极1。示例性的，所述构图工艺包括涂布光刻胶、曝光、显影、刻蚀以及清洗等工序。
此外，在形成所述多各第一触控电极1之前，对于衬底10上已形成的膜层不做限定。示例性的，在形成所述多条第一触控电极1之前，衬底10上可以形成有黑矩阵图案(Black Matrix，简称BM)。
在另一个示例中，在形成所述多各第一触控电极1之前，先在衬底10的一侧上形成第一保护层(Over Coat，简称OC)，然后在该第一保护层的背向衬底10的一侧上形成所述多条第一触控电极1。在此，在形成所述多条第一 触控电极1的过程中，第一保护层能够起到保护衬底10的作用。
S102、在所述多条第一触控电极1背向衬底10的一侧上形成绝缘层3。
在此，对于绝缘层3的材料不进行限定。示例性的，绝缘层3的材料为氮化硅、氧化硅或氮氧化硅中的至少一种。
S103、在绝缘层3背向衬底10的一侧上形成多条第二触控电极2，多条第二触控电极2沿第二方向OY延伸。
其中，如图2B所示，每条第二触控电极2包括网格结构30和多个第一虚拟电极41。网格结构30具有多个第一格301，每个第一格301中设置有至少一个第一虚拟电极41，且每个第一虚拟电极41与其所在的第一格301电绝缘。
在此，对于形成所述多条第二触控电极2的具体制作工艺不进行限定。例如，先在绝缘层3上形成第二导电薄膜，再对该第二导电薄膜进行构图工艺，以形成所述多条第二触控电极2。示例性的，所述构图工艺包括涂布光刻胶、曝光、显影、刻蚀以及清洗等工序。
参见图1A和图3A，通过上述制作方法制作出的触控基板100中，所述多条第一触控电极1在衬底10的正投影与所述多条第二触控电极2在衬底10的正投影交叉，形成多个交叉区域A。在每个交叉区域A内，第一触控电极1中的网格结构30在衬底10的正投影与第二触控电极2中的网格结构30在衬底10的正投影形成投影网格结构。投影网格结构具有多个第二格302，每个第一虚拟电极41在衬底10的正投影位于一个第二格302中，且每个第一虚拟电极41在衬底10的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。例如，本实施例中的第一虚拟电极可以为图2A、图2B和图3A示出的第一虚拟电极41；又例如，本实施例中的第一虚拟电极还可以为如图5A～图5C示出的第一虚拟电极41。这样，相较于图4示出的第一虚拟电极而言，本实施例提供的第一虚拟电极上的电荷更容易导出，从而不容易出现如上所述的屏幕在触控时显现出明暗相间的网格纹的现象。
以上所述，仅为本公开的具体实施方式，但本公开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公开揭露的技术范围内，想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种触控基板，包括：
    衬底；
    设置于所述衬底上的多条第一触控电极，多条第一触控电极沿第一方向延伸；以及，
    设置于所述衬底上的多条第二触控电极，多条第二触控电极沿与所述第一方向交叉的第二方向延伸，并且多条第二触控电极与多条第一触控电极之间相互绝缘；
    其中，每条第一触控电极和每条第二触控电极中均包括网格结构和多个第一虚拟电极；所述网格结构包括多个第一格，每个第一格中设置有至少一个第一虚拟电极，且每个第一虚拟电极与其所在的第一格之间相互绝缘；
    多条第一触控电极在所述衬底的正投影与多条第二触控电极在所述衬底的正投影交叉，形成多个交叉区域；在每个交叉区域内，所述第一触控电极中的网格结构在所述衬底的正投影与所述第二触控电极中的网格结构在所述衬底的正投影形成投影网格结构；
    所述投影网格结构具有多个第二格，每个所述第一虚拟电极在所述衬底的正投影位于一个所述第二格中，且每个所述第一虚拟电极在所述衬底的正投影包括至少两条线段，所述至少两条线段交叉设置，且所述至少两条线段之间不存在封闭区域。
  2. 根据权利要求1所述的触控基板，其中，
    所述第一虚拟电极和其所在的第一格的边缘之间留有设定间距。
  3. 根据权利要求2所述的触控基板，其中，
    所述设定间距为4μm～12μm。
  4. 根据权利要求1～3中任一项所述的触控基板，其中，每个所述第二格包括：
    第一边缘，所述第一边缘为所述第一触控电极中的网格结构在所述衬底的部分正投影；
    第二边缘，所述第二边缘为所述第二触控电极中的网格结构在所述衬底的部分正投影；
    其中，所述第一触控电极中的第一虚拟电极在所述衬底的正投影与该第一虚拟电极所在的第二格的第二边缘彼此相连或者彼此部分地重叠；和/或，
    所述第二触控电极中的第一虚拟电极在所述衬底的正投影与该第一虚拟电极所在的第二格的第一边缘彼此相连或者彼此部分地重叠。
  5. 根据权利要求1～4中任一项所述的触控基板，其中，所述第一格的形状为正方形、长方向、菱形或正六边形；
    所述第二格的形状为正方形、长方形或菱形。
  6. 根据权利要求1～5中任一项所述的触控基板，其中，所述第一格的面积是所述第二格的面积的整数倍。
  7. 根据权利要求1～6中任一项所述的触控基板，其中，
    每个所述第一虚拟电极中的至少两条线段相交于第一交点，所述第一交点位于其所在的第二格的中心处。
  8. 根据权利要求1～7中任一项所述的触控基板，其中，每个所述第一虚拟电极中包括相交于同一点的两条线段，所述两条线段分别平行于所述第二格的两条邻边。
  9. 根据权利要求1～8中任一项所述的触控基板，其中，所述第一触控电极中的第一格和所述第二触控电极中的第一格均为第一菱形格；
    所述第一触控电极中的两个第一虚拟电极设置于所述第一触控电极中的一个第一菱形格中，且沿该第一菱形格的第一对角线方向间隔设置；
    所述第二触控电极中的两个第一虚拟电极设置于所述第二触控电极中的一个第一菱形格中，且沿该第一菱形格的第二对角线方向间隔设置；
    其中，所述第一触控电极中的第一菱形格的第一对角线与所述第二触控电极中的第一菱形格的第二对角线在空间上相互垂直。
  10. 根据权利要求9所述的触控基板，其中，所述第二格为第二菱形格，所述第二菱形格的各个边与所述第一菱形格的各个边分别平行，且所述第二菱形格的面积为所述第一菱形格的面积的四分之一。
  11. 根据权利要求10所述的触控基板，其中，每个所述第一虚拟电极中包括相交于同一点的两条线段，所述两条线段的中心位于所述第二菱形格的中心处，并且所述两条线段分别平行于所述第二菱形格的两条邻边。
  12. 根据权利要求1～11中任一项所述的触控基板，还包括：
    与所述第一触控电极同层设置、且位于相邻两条所述第一触控电极之间的多个第二虚拟电极；和/或，
    与所述第二触控电极同层设置、且位于相邻两条所述第二触控电极之间的多个第三虚拟电极。
  13. 根据权利要求1～12中任一项所述的触控基板，其中，
    相邻两条所述第一触控电极之间的间距为40μm～50μm；和/或，
    相邻两条所述第二触控电极之间的间距为40μm～50μm。
  14. 根据权利要求1～13中任一项所述的触控基板，其中，所述多条第一触控电极为多条驱动电极，所述多条第二触控电极为多条感应电极；或者，
    所述多条第一触控电极为多条感应电极，所述多条第二触控电极为多条驱动电极。
  15. 根据权利要求1～14中任一项所述的触控基板，还包括：
    绝缘层，设置于所述多条第二触控电极和所述多条第一触控电极之间，以使所述多条第二触控电极与所述多条第一触控电极之间相互绝缘。
  16. 一种触控显示装置，包括：
    如权利要求1～15中任一项所述的触控基板。
  17. 根据权利要求16所述的触控显示装置，其中，所述触控基板的衬底为保护盖板；或者，
    所述触控基板的衬底为彩膜基板；或者，
    所述触控基板的衬底为用于封装显示基板的封装层。
  18. 根据权利要求16所述的触控显示装置，其中，所述触控显示装置为液晶显示装置，所述液晶显示装置包括对盒设置的阵列基板和对置基板、以及位于二者之间的液晶；
    所述触控基板的衬底为所述对置基板，所述触控基板的多条第一触控电极和多条第二触控电极位于所述对置基板远离所述液晶的一侧。
  19. 根据权利要求16～18中任一项所述的触控显示装置，还包括：
    偏光片，设置于所述触控基板的多条第一触控电极和多条第二触控电极远离所述触控基板的衬底一侧。
  20. 根据权利要求19所述的触控显示装置，还包括：
    胶层，设置于所述偏光片与所述触控基板之间；所述胶层的电阻率为10 8Ω·m～10 11Ω·m。
PCT/CN2021/093654 2020-06-29 2021-05-13 触控基板及触控显示装置 WO2022001412A1 (zh)

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