WO2022134166A1 - 触控组件及触控显示装置 - Google Patents

触控组件及触控显示装置 Download PDF

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Publication number
WO2022134166A1
WO2022134166A1 PCT/CN2020/141437 CN2020141437W WO2022134166A1 WO 2022134166 A1 WO2022134166 A1 WO 2022134166A1 CN 2020141437 W CN2020141437 W CN 2020141437W WO 2022134166 A1 WO2022134166 A1 WO 2022134166A1
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WIPO (PCT)
Prior art keywords
electrode
branch
trunk
touch
electrodes
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PCT/CN2020/141437
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English (en)
French (fr)
Inventor
王杰平
叶剑
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US17/284,454 priority Critical patent/US11941206B2/en
Publication of WO2022134166A1 publication Critical patent/WO2022134166A1/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
    • G06F3/0416—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • 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

  • the present application relates to the technical field of touch display, and in particular, to a touch component and a touch display device.
  • the touch electrode pattern is usually a hollow metal grid, which causes a finger to touch the flexible active organic light emitting diode (AMOLED) touch display.
  • the amount of capacitance change caused is small, and the small amount of capacitance change is not easy to be detected by the touch chip, which affects the touch sensitivity.
  • the touch electrode pattern is fabricated on the thin film encapsulation layer.
  • the thin film encapsulation layer is relatively thin (usually about 10um in thickness)
  • the distance between the touch electrode pattern and the cathode of the entire surface of the flexible active organic light emitting diode display panel Smaller, resulting in a larger parasitic capacitance between the two, which in turn leads to a larger resistance-capacitance delay, which affects the touch reporting rate.
  • the purpose of the present application is to provide a touch component and a touch display device, and the touch component and the touch display device have good touch sensitivity.
  • a touch control component the touch control component includes a plurality of touch control units, each of the touch control units includes a first electrode and a second electrode, the first electrode and the second electrode are electrically insulated,
  • the first electrode includes:
  • At least one first branch electrode extending from the intersection of the first stem electrode and the second stem electrode in a direction away from the first stem electrode and the second stem electrode;
  • At least one third branch electrode extending from the first trunk electrode in a direction away from the first trunk electrode and the second trunk electrode, and disposed adjacent to at least one of the first branch electrodes;
  • the second electrode includes:
  • the second stem electrode extending in a second direction
  • At least one second branch electrode extending from the intersection of the first trunk electrode and the second trunk electrode in a direction away from the first trunk electrode and the second trunk electrode;
  • the second branch electrode surrounds the first branch electrode corresponding to the second branch electrode
  • the third branch electrode adjacent to the first branch electrode surrounds the second branch electrode and is located at a portion between the first branch electrode and the third branch electrode
  • two adjacent third branch electrodes located in two adjacent touch units respectively are connected to each other at one end away from the third branch electrode and the first trunk electrode. connected, the first direction is different from the second direction.
  • a touch display device includes the above-mentioned touch component and a display panel, wherein the touch component is located on a light-emitting side of the display panel.
  • the present application provides a touch component and a touch display device, wherein a corresponding first branch electrode is surrounded by a second branch electrode, and a third branch electrode adjacent to the first branch electrode surrounds the second branch electrode and is located between the first branch electrode and the first branch electrode.
  • the portion between the third branch electrodes increases the mutual capacitance between the first electrode and the second electrode, which is beneficial to improve the touch sensitivity of the touch control component and the touch display device.
  • two adjacent third branch electrodes respectively located in two adjacent touch units in the first direction are connected to each other at one end away from the connection with the first trunk electrode, so that the channels through which the first electrodes transmit electrical signals are increased, Improving the influence of the resistance-capacitance delay on the electrical signal transmission is beneficial to improve the touch reporting rate of the touch component and the touch display device.
  • FIG. 1 is a schematic cross-sectional view of a touch display device according to an embodiment of the present application
  • FIG. 2 is a schematic cross-sectional view of a display panel of the touch display device shown in FIG. 1;
  • FIG. 3 is a schematic cross-sectional view of a touch component of the touch display device shown in FIG. 1;
  • FIG. 4 is a partial plan view of a touch component of the touch display device shown in FIG. 1;
  • FIG. 5 is a schematic plan view of a touch unit in FIG. 4;
  • FIG. 6 is a schematic plan view of the first electrode of the touch control unit shown in FIG. 5;
  • FIG. 7 is a schematic plan view of the second electrode of the touch control unit shown in FIG. 5;
  • FIG. 8 is a partially enlarged schematic view of the touch control assembly shown in FIG. 4;
  • FIG. 9 is a partial schematic diagram of a sub-pixel of the display panel corresponding to the touch component when the first electrode and the second electrode are composed of metal meshes;
  • FIG. 10 is a schematic plan view of a touch control unit of a comparative example.
  • FIG. 1 is a schematic cross-sectional view of a touch display device according to an embodiment of the present application.
  • the touch display device 100 includes a display panel 10 , a touch component 20 , a polarizer 30 and a protective cover 40 .
  • the touch component 20 is disposed on the display panel 10 and is located on the light-emitting side of the display panel 10 .
  • the polarizer 30 is connected to the touch component 20 through a transparent adhesive layer, and the protective cover 40 is connected to the polarizer 30 through a transparent adhesive layer.
  • the display panel 10 is used to display a screen.
  • the display panel 10 may be a liquid crystal display panel, an organic light emitting diode display panel, or other display panels.
  • FIG. 2 which is a schematic cross-sectional view of the display panel of the touch display device shown in FIG. 1
  • the display panel 10 is a flexible organic light emitting diode display panel.
  • the display panel 10 includes a substrate 101 , a thin film transistor array layer 102 , an organic light emitting diode array layer 103 , and a thin film encapsulation layer 104 .
  • the thin film transistor array layer 102 is disposed on the substrate 101 , the organic light emitting diode array layer 103 is disposed on the thin film transistor array layer 102 , and the thin film encapsulation layer 104 is disposed on the organic light emitting diode array layer 103 .
  • the substrate 101 is a flexible substrate, and the substrate 101 includes a polyimide layer.
  • the base 101 may also be a glass substrate.
  • the thin film transistor array layer 102 includes a plurality of thin film transistors arranged in an array, and the thin film transistors may be at least one of polysilicon transistors, metal oxide transistors, and amorphous silicon transistors.
  • the thin film transistor may be a bottom gate type thin film transistor or a top gate type thin film transistor.
  • the thin film transistor array layer 102 may also include devices such as capacitors.
  • the organic light emitting diode array layer 103 includes a plurality of independent anodes, an organic light emitting layer disposed on the anodes, and a common cathode, and the common cathode is formed on the entire surface.
  • the anode and common cathode are made from metals or/and transparent metal oxides. Among them, the metal includes silver, copper or other metals.
  • the transparent metal oxide includes at least one of indium tin oxide and indium zinc oxide.
  • the thin film encapsulation layer 104 is used to block water vapor and oxygen from permeating into the organic light emitting diode array layer 103 , preventing the organic light emitting layer and the common cathode from contacting with water vapor and/or oxygen and shortening the service life of the display panel.
  • the thickness of the thin film encapsulation layer 104 is 8-12 microns.
  • the thin film encapsulation layer 104 includes a first inorganic layer, an organic layer, and a second inorganic layer.
  • the preparation materials of the first inorganic layer and the second inorganic layer include at least one of silicon nitride and silicon oxide.
  • the preparation material of the organic layer includes polyimide, polyacrylate or other organic materials.
  • the thickness of the thin film encapsulation layer 104 is typically 10 microns.
  • the touch element 20 includes a buffer layer 203 , a first electrode 201 , a second electrode 202 , a first passivation layer 204 and a second passivation layer 205 .
  • the second electrode 202 includes a bridge portion 2022 , and the bridge portion 2022 is disposed on the buffer layer 203 .
  • the first passivation layer 204 covers the bridge portion 2022 and the buffer layer 203 .
  • the portion of the second electrode 202 other than the bridge portion 2022 and the first electrode 201 are disposed on the first passivation layer 204 .
  • the bridge portion 2022 bridges the portion of the second electrode 202 on the first passivation layer 204 through the via hole 204 a on the first passivation layer 204 .
  • the second passivation layer 205 covers the first electrode 201 , the part of the second electrode 202 except for the bridge portion 2022 , and the first passivation layer 204 .
  • the buffer layer 203 , the first passivation layer 204 and the second passivation layer 205 are all insulating layers, and the insulating layers are inorganic insulating layers or organic insulating layers.
  • the preparation material of the inorganic insulating layer is selected from at least one of silicon nitride and silicon oxide, and the preparation material of the organic insulating layer is selected from at least one of polyimide or polyacrylate.
  • FIG. 4 is a partial plan view of the touch control component of the touch display device shown in FIG. 1
  • FIG. 5 is a plan view of a touch unit in FIG. 4
  • FIG. FIG. 7 is a schematic plan view of the second electrode of the touch control unit shown in FIG. 5
  • the touch component 20 includes a plurality of touch units 20a arranged in an array. Each touch unit 20a implements the touch function as an independent functional unit. The shape of each touch unit 20a is a square.
  • Each touch unit 20a includes a first electrode 201 and a second electrode 202, and the first electrode 201 and the second electrode 202 are electrically insulated.
  • the first electrodes 201 and the second electrodes 202 in the touch unit 20a constitute mutual capacitive touch electrodes.
  • the first electrode 201 is a driving electrode
  • the second electrode 202 is a sensing electrode.
  • the plurality of first electrodes 201 are electrically connected in the first direction and insulated from each other in the second direction, and a plurality of adjacent first electrodes 201 arranged side by side in the first direction form a first electrode channel.
  • the plurality of second electrodes 202 are electrically connected in the second direction and insulated from each other in the first direction, and a plurality of adjacent second electrodes 202 arranged side by side in the second direction form a second electrode channel. Wherein, the first direction and the second direction are different.
  • the first electrode 201 and the second electrode 202 may be composed of metal meshes, wherein the preparation material of the metal meshes is selected from at least one of molybdenum, aluminum, titanium, copper, and silver.
  • the first electrode 201 and the second electrode 202 may also be composed of transparent conductive blocks, wherein the preparation material of the transparent conductive blocks is selected from at least one of indium tin oxide and indium zinc oxide.
  • the first electrode 201 and the second electrode 202 are composed of metal meshes.
  • FIG. 9 it is a partial schematic diagram of a sub-pixel of the display panel corresponding to the touch component when the first electrode and the second electrode are composed of metal meshes.
  • the display panel 10 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B.
  • the metal meshes forming the first electrode 201 and the second electrode 202 surround the red sub-pixel R, the green sub-pixel G and the blue sub-pixel B, and a metal mesh surrounds the red sub-pixel R, the green sub-pixel G and the blue sub-pixel one of B.
  • the metal grid is arranged around the sub-pixels to prevent the metal grid from blocking the light emitted by the sub-pixels.
  • the part of the second electrode 202 other than the bridge portion 2022 and the first electrode 201 are located in the same metal mesh layer. To achieve electrical insulation between the two.
  • the first electrode 201 includes a first trunk electrode 2011 , at least one first branch electrode 2012 , at least one third branch electrode 2013 , a third connection portion 2014 and a first electrode extension portion 2015.
  • the first trunk electrode 2011 extends in the first direction.
  • the first trunk electrode 2011 is the main channel through which the first electrode 201 transmits electrical signals, and the first trunk electrode 2011 composed of metal grids has not undergone the process of removing part of the metal grid, so that the resistance of the first trunk electrode 2011 is minimized, and further
  • the resistance of the first electrode 201 is made smaller, which is beneficial to avoid the delay of the electrical signal transmitted by the first electrode 201 caused by the larger impedance, and is beneficial to improve the touch reporting rate of the touch component.
  • At least one first branch electrode 2012 extends from the first trunk electrode 2011 near the intersection of the first trunk electrode 2011 and the second trunk electrode 2021 in a direction away from the first trunk electrode 2011 and the second trunk electrode 2021.
  • the included angle between the first branch electrode 2012 and the first trunk electrode 2011 is ⁇ , and ⁇ is greater than 0 degrees and less than 90 degrees.
  • At least one third branch electrode 2013 extends from the first trunk electrode 2011 in a direction away from the first trunk electrode 2011 and the second trunk electrode 2021 , and is disposed adjacent to the at least one first branch electrode 2012 .
  • the third branch electrode 2013 is arranged in parallel with the adjacent first branch electrode 2012, so the angle between the third branch electrode 2013 and the first trunk electrode 2011 can be equal to the angle between the first branch electrode 2012 and the first trunk electrode 2011 angle. It can be understood that the angle between the third branch electrode 2013 and the first trunk electrode 2011 may not be equal to the angle between the first branch electrode 2012 and the first trunk electrode 2011, and the third branch electrode 2013 and the phase
  • the adjacent first trunk electrodes 2011 also do not intersect.
  • At least one first branch electrode 2012 extends from the first trunk widening portion A 2011a
  • at least one third branch electrode 2013 extends from the first trunk widening portion B 2011b
  • the first trunk adds
  • the resistance at the wide part A 2011a and the first trunk widening part B 2011b is relatively small, which is conducive to the transmission of electrical signals from the first trunk electrode 2011 to the at least one first branch electrode 2012 and the at least one third branch electrode 2013, and is conducive to It is electrically connected to at least one first branch electrode 2012 extending from the first trunk widening portion A 2011a and at least one third branch electrode 2013 extending from the first trunk widening portion B 2011b.
  • the area of the first trunk widening portion A 2011a is larger than that of the first trunk widening portion B 2011b.
  • the first electrode 201 is symmetrically disposed with respect to the first trunk electrode 2011 and the second trunk electrode 2021
  • the first trunk electrode 2011 includes two first sub-trunk electrodes 20111 symmetrically disposed with respect to the second trunk electrode 2021
  • the third connection portion 2014 connects two first sub-main electrodes 20111 of the first main electrode 2011, each side of each first sub-main electrode 20111 extends a first branch electrode 2012 and a third branch electrode 2013, and the first branch
  • the included angle ⁇ between the electrode 2012 and the third branch electrode 2013 and the first sub-trunk electrode 20111 is 45 degrees.
  • the second electrode 202 includes a second trunk electrode 2021 , a bridge portion 2022 and at least one second branch electrode 2023 .
  • the second trunk electrode 2021 extends in the second direction.
  • the first trunk electrode 2011 and the second trunk electrode 2021 intersect at the center of the touch unit 20a.
  • the second trunk electrode 2021 is the main channel for the second electrode 202 to transmit electrical signals.
  • the second trunk electrode 2021 composed of metal meshes has not undergone the process of removing part of the metal meshes, so that the resistance of the second trunk electrode 2021 is minimized, and further
  • the resistance of the second electrode 202 is smaller, which is beneficial to avoid the delay caused by the larger impedance to the electrical signal transmitted by the second electrode 202, and is further beneficial to improve the touch reporting rate of the touch component.
  • At least one second branch electrode 2023 extends from the second stem electrode 2021 near the intersection of the first stem electrode 2011 and the second stem electrode 2021 in a direction away from the first stem electrode 2011 and the second stem electrode 2021 .
  • the included angle between the second branch electrode 2023 and the second trunk electrode 2021 is ⁇ , and ⁇ is greater than 0 and less than 90 degrees.
  • the second electrode 202 is symmetrically arranged with respect to the first trunk electrode 2011 and the second trunk electrode 2021;
  • the second trunk electrode 2021 includes two second sub-trunk electrodes 20211 symmetrically arranged with respect to the first trunk electrode 2011, and the bridge portion 2022 bridges two second sub-main electrodes 20211 of the second main electrode 2021, each side of each second sub-main electrode 20211 extends a second branch electrode 2023, and the second branch electrode 2023 and the second sub-main
  • the angle ⁇ between the electrodes 20211 is 45 degrees.
  • the second branch electrode 2023 surrounds the first branch electrode 2012 corresponding to the second branch electrode 2023
  • the third branch electrode 2013 adjacent to the first branch electrode 2012 surrounds the second branch electrode 2023 located in the first A portion between the branch electrode 2012 and the third branch electrode 2013 .
  • the corresponding first branch electrodes 2012 are surrounded by the second branch electrodes 2023, and the part of the second branch electrodes 2023 located between the first branch electrodes 2012 and the third branch electrodes 2013 is surrounded by the third branch electrodes 2013, so as to increase the first electrode 201
  • the mutual capacitance with the second electrode 202 is beneficial to increase the amount of change in the mutual capacitance, thereby improving the touch sensitivity.
  • At least one first branch electrode 2012 and at least one third branch electrode 2013 are mainly used to generate mutual capacitance with at least one second branch electrode 2023 , and at least one first branch electrode 2012 and at least one third branch electrode 2013
  • the mutual capacitance with the at least one second branch electrode 2023 will affect the variation of the mutual capacitance.
  • the larger the change in the mutual capacitance the higher the touch sensitivity.
  • third branch electrode 2013 when a plurality of third branch electrodes 2013 extend from each side of each first sub-main electrode 20111, only one third branch electrode 2013 surrounds the second branch electrode 2023 and interacts with the second branch electrode 2023. capacitance, the mutual capacitance between the other third branch electrodes 2013 and the second branch electrodes 2023 is small, and the parasitic capacitance between the third branch electrodes 2013 and the common cathode is large, which will cause the first electrode and the common cathode. Parasitic capacitance is large. Only one third branch electrode 2013 extends from each side of each first sub-trunk electrode 20111 in the present application, which is more conducive to reducing the parasitic capacitance between the first electrode and the common cathode.
  • the adjacent two third branch electrodes 2013 located in the adjacent two touch units 20a are connected, so that the electrical signals transmitted by the first electrodes 201 can not only be transmitted through the first trunk electrodes 2011, but also can Transmission through the connected two third branch electrodes 2013 increases the transmission channels of electrical signals on the first electrodes 201 of the adjacent two touch units 20a, thereby improving the problem that the resistance-capacitance delay affects the transmission of electrical signals.
  • two adjacent second branch electrodes 2023 located in two adjacent touch units 20a are connected, so that the electrical signals transmitted by the second electrodes 202 can not only be transmitted through the second trunk electrodes 2021, but also can be Transmission through the connected two second branch electrodes 2023 increases the transmission channels of electrical signals on the second electrodes 202 of two adjacent touch units 20a, further improving the problem that the resistance-capacitance delay affects the transmission of electrical signals.
  • the electrical signal transmission channel of the first electrode 201 is increased, and the electrical signal transmission channel of the second electrode 202 is increased, so as to avoid the problem of reducing the touch reporting rate caused by insufficient charging of the touch unit caused by excessive resistance-capacitance delay. It is beneficial to improve the touch reporting rate.
  • the present application adds a third branch electrode 2013, the third branch electrode 2013 surrounds the part of the second branch electrode 2023, and cooperates with the second branch electrode 2023 to surround the first branch electrode 2012, so as to improve the first electrode 201 and the second branch electrode 2012.
  • the mutual capacitance between the two electrodes 202 is beneficial to increase the variation of the mutual capacitance, thereby improving the touch sensitivity of the touch component.
  • the adjacent two third branch electrodes 2013 in the two adjacent touch units 20a in the first direction are connected to increase the electrical signal transmission channel of the first electrodes 201, which is beneficial to improve the touch reporting rate of the touch components .
  • the first dummy electrodes 206 are disposed in the regions enclosed by the two adjacent second branch electrodes 2023 and the second trunk electrodes 2021 in the adjacent two adjacent touch units 20a respectively.
  • the first dummy electrode 206 is electrically insulated from the second electrode 202
  • the part of the second branch electrode 2023 between the first dummy electrode 206 and the first branch electrode 2012 is connected to the first branch electrode 2012 and the first dummy electrode 206 respectively. bite.
  • the boundary between the first dummy electrode 206 and the second branch electrode 2023 is a linear boundary, that is, no
  • the first dummy electrode 206 and the second branch electrode 2023 may be engaged with each other. That is to say, the part of the first dummy electrode 206 that is engaged with the second branch electrode 2023 in FIG.
  • the second branch electrode 2023 of this part is far from the corresponding first dummy electrode 2023
  • the branch electrodes 2012 are far away, so the mutual capacitance between them is small, so removing this part of the second branch electrodes 2023 will not affect the mutual capacitance between the first branch electrodes 2012 and the second branch electrodes 2023 .
  • the present application uses the first dummy electrode 206 and the second branch electrode 2023 to engage with each other, so that part of the first dummy electrode 206 replaces the traditional design
  • the present application removes part of the second branch electrode 2023 and fills the first dummy electrode 206, under the condition of ensuring the mutual capacitance between the second branch electrode 2023 and the first branch electrode 2012 and the third branch electrode 2013 , reducing the area of the second branch electrode 2023 , thereby reducing the parasitic capacitance between the second branch electrode 2023 and the common cathode, and improving the delay caused by the parasitic capacitance to the electrical signal transmitted by the second electrode 202 .
  • the first dummy electrode 206 ensures the uniformity of the light emitted by the display panel 10 after passing through the touch component 20 .
  • the portion of the second branch electrode 2023 located between the first dummy electrode 206 and the first branch electrode 2012 is engaged with the first branch electrode 2012 and the first dummy electrode 206, so that the second branch electrode 2023 and the first branch electrode 2023 are engaged with each other.
  • the occlusal boundary between the 2012 is increased to increase the mutual capacitance between the second branch electrode 2023 and the first branch electrode 2012, while further reducing the area of the second branch electrode 2023 so that the second branch electrode 2023 and the common cathode are separated.
  • the parasitic capacitance between them is further reduced, which is beneficial to improve the touch sensitivity and touch reporting rate of the touch component.
  • a second dummy electrode 207 is disposed in an area enclosed by two adjacent third branch electrodes 2013 and the first main electrode 2011 in two adjacent touch units 20a respectively.
  • the second dummy electrode 207 Electrically insulated from the first electrode 201, the part of the second branch electrode 2023 located between the first branch electrode 2012 and the third branch electrode 2013 is respectively engaged with the first branch electrode 2012 and the third branch electrode 2013, so that the second branch electrode 2013 is
  • the portion of the branch electrode 2023 located between the first branch electrode 2012 and the third branch electrode 2013 and the occlusal boundary between the first branch electrode 2012 and the third branch electrode 2013 is increased, and the first electrode 201 and the second electrode 202 are further increased.
  • the mutual capacitance between them is more conducive to improving the touch sensitivity.
  • the third branch electrode 2013 When the boundary between the second dummy electrode 207 and the second dummy electrode 207 is a straight line, that is, when the part where the second dummy electrode 207 and the third branch electrode 2013 are engaged is the third branch electrode 2013 in FIG.
  • the distance between the second branch electrodes is far, so that the mutual capacitance between them is small, and the mutual capacitance between the part of the third branch electrode 2013 and the common cathode is large.
  • the third branch electrode 2013 and the second dummy electrode 207 are engaged with each other, so that the second dummy electrode 207 replaces the third branch electrode 2013 that forms a smaller mutual capacitance with the second branch electrode. While the mutual capacitance between 201 and the second electrode 202, the area of the third branch electrode 2013 is minimized, which further reduces the parasitic capacitance between the third branch electrode 2013 and the common cathode, and is more conducive to improving the touch control component. Touch point rate and touch sensitivity.
  • the first branch electrode 2012 includes a plurality of widened parts 2012a and a plurality of narrowed parts 2012b, the widened parts 2012a and the narrowed parts 2012b are alternately connected, and the narrowed parts 2012b are connected to the narrowed parts 2012b.
  • the shape of the widened portion 2012a is a rectangle
  • the shape of the narrowed portion 2012b is a rectangle
  • the width of the widened portion 2012a is larger than the width of the narrowed portion 2012b.
  • Two adjacent widened portions 2012a and corresponding narrowed portions 2012b enclose a first concave portion 2012c.
  • the narrowed portion 2012b surrounds two or more sub-pixels in the width direction of the first branch electrode 2012 .
  • the number of widened portions 2012a may be 2, 3, 4, or more. Specifically, in this embodiment, the number of the widening portions 2012a is four.
  • the third branch electrode 2013 includes a third protruding portion 2013a, a fourth protruding portion 2013b, and a second connecting portion 2013c.
  • the third raised portion 2013a is connected to the side of the second connection portion 2013c away from the first branch electrode 2012
  • the fourth raised portion 2013b is connected to the side of the second connection portion 2013c close to the first branch electrode 2012
  • the third raised portion 2013b The portions 2013a and the fourth protruding portions 2013b are alternately arranged along the second connecting portion 2013c.
  • the third protruding portion 2013a is provided corresponding to the widening portion 2012a
  • the fourth protruding portion 2013b is provided corresponding to the narrowing portion 2012b.
  • the second branch electrode 2023 includes a first protruding portion 2023a corresponding to the widening portion 2012a, a second protruding portion 2023b corresponding to the narrowing portion 2012b, and a first connecting portion 2023c.
  • the first protruding portion 2023a is connected to the first protruding portion 2023a.
  • the connecting portion 2023c is on the side away from the first branch electrode 2012, the second protruding portion 2023b is connected to the side of the first connecting portion 2023c close to the first branch electrode 2012, and the first protruding portion 2023a and the second protruding portion 2023b are alternately
  • the ground is arranged along the first connecting portion 2023c.
  • the second protruding portion 2023b is disposed in the first concave portion 2012c, so that the second protruding portion 2023b and the widening portion 2012a are engaged with each other.
  • the first dummy electrode 206 includes a fifth protrusion 206a
  • the second dummy electrode 207 includes a sixth protrusion 207a.
  • the sixth protruding portion 207a and the third protruding portion 2013a of the third branch electrode 2013 are engaged with each other, and the fourth protruding portion 2013b and the first protruding portion 2023a of the second branch electrode 2023 are engaged with each other.
  • the fifth protruding portion 206a and the second protruding portion 2023b of the second branch electrode 2023 are engaged with each other.
  • the fifth raised portion 206a is a portion where the first dummy electrode 206 replaces part of the second branch electrode 2023
  • the sixth raised portion 207a is a portion where the second dummy electrode 207 replaces a portion of the third branch electrode 2013.
  • the first protruding portion 2023a is the same as the second protruding portion 2023b, that is, the shape of the first protruding portion 2023a is the same as the shape of the second protruding portion 2023b, and the size of the first protruding portion 2023a The same size as the second protrusion 2023b.
  • the third protruding portion 2013a is the same as the fourth protruding portion 2013b, that is, the shape of the third protruding portion 2013a is the same as the shape of the fourth protruding portion 2013b, and the size of the third protruding portion 2013a is the same as that of the fourth protruding portion 2013b are the same size.
  • the first protruding portion 2023a is the same as the third protruding portion 2013a, and the width of the second connecting portion 2013c is the same as the width of the first connecting portion 2023c, so the third branch electrode 2013 and the second branch electrode 2023 are located in the first branch electrode
  • the part between 2012 and the third branch electrode 2013 adopts a similar design
  • the part between the first branch electrode 2012 and the first dummy electrode 206 of the third branch electrode 2013 and the second branch electrode 2023 adopts a similar design.
  • one end of the first electrode extension portion 2015 is connected to the junction of two adjacent third branch electrodes 2013 respectively located in the adjacent two touch units 20a in the first direction, and the first electrode extends The other end of the portion 2015 extends to the junction of two adjacent touch units 20a in the second direction and is electrically insulated from the end corresponding to the adjacent first electrode extending portion 2015 .
  • the first electrode extension part 2015 plays a role of electrically isolating the second electrode 202 in the first direction, and the first electrode extension part 2015 also plays a role of forming a mutual capacitance with the second branch electrode 2023 .
  • the first electrode extension part 2015 includes a first electrode extension trunk part 2015a and two first electrode extension branch parts 2015b extended from the first electrode extension trunk part 2015a.
  • the area enclosed by the two first electrode extension branches 2015b of the electrode extension part 2015 is provided with a third dummy electrode 208, and the third dummy electrode 208 is electrically insulated from the first electrode 201 to ensure that the first electrode extension branch 2015b and While the second branch electrode 2023 forms a larger mutual capacitance, the area of the first electrode extension portion 2015b is minimized.
  • the first electrode extending trunk portion 2015a is parallel to the second trunk electrode 2021, and the first electrode extending branch portion 2015b is V-shaped.
  • insulation is provided between two adjacent first electrode extension branch portions 2015b in the second direction, specifically by cutting the metal mesh and between two adjacent first electrode extension branch portions 2015b The gap setting of the third dummy electrode 208 is realized.
  • the second branch electrode of the second electrode surrounds the first branch electrode of the first electrode
  • the third branch electrode adjacent to the first branch electrode surrounds the part of the second branch electrode
  • the third branch electrode and the first branch electrode They are arranged in parallel
  • the plurality of first branch electrodes, the plurality of second branch electrodes and the plurality of third branch electrodes are symmetrically arranged with respect to the first trunk electrode and the second trunk electrode, which can effectively improve the gap between the first electrode and the second electrode.
  • the distribution of the mutual capacitance electric field lines is more uniform, which is more conducive to improving the resolution and accuracy of detecting the touch position.
  • the first electrode can transmit electrical signals between adjacent touch units through the first trunk electrode and the third branch electrodes
  • the second electrode can transmit electrical signals between adjacent touch units through the second trunk electrode and the second branch electrodes Transmission of electrical signals reduces the contact impedance between adjacent touch units in the first direction and the second direction, thereby reducing the impedance of the first electrode channel and the second electrode channel, which is beneficial to improve the touch reporting rate
  • the first dummy electrode can effectively reduce the parasitic capacitance between the first electrode and the common cathode
  • the second dummy electrode and the third dummy electrode can effectively reduce the parasitic capacitance between the second electrode and the common cathode, which can significantly improve the entire touch unit and the common cathode.
  • the resistance-capacitance delay between them is beneficial to improve the touch point reporting rate.
  • the first dummy electrode, the second dummy electrode and the third dummy electrode are also used to maintain the uniformity of light output from the pixels of the display panel.
  • the touch unit of the touch control component of the present application can increase the signal amount when the finger touches to ensure the touch sensitivity, and avoid the touch screen touch frequency caused by insufficient charging of the touch unit caused by excessive resistance-capacitance delay.
  • the problem is that the key touch performance indicators such as the reporting rate are affected by the decrease, thereby improving the touch performance of the touch display device.
  • FIG. 10 it is a schematic plan view of the touch control unit of the comparative example.
  • the touch control unit 50 shown in FIG. 10 is basically similar to the touch control unit shown in FIG. 4 , and the difference is that the touch control unit shown in FIG. 10 includes a first electrode 501 and a second electrode 502 , and the first electrode 501 includes a The first trunk electrode 5011 and the first branch electrode 5012 extending in the second direction include the second trunk electrode 5021 and the second branch electrode 5022 extending in the second direction, and the second branch electrode 5022 surrounds the corresponding first branch electrode 5012 , the second branch electrodes 5022 of two adjacent touch units 50 in the second direction are connected at one end away from the second branch electrodes 5022 connected to the second trunk electrodes 5021 .
  • the differences include: (1) the first electrode 501 of the touch control unit 50 shown in FIG. 10 does not extend out of the third branch electrode shown in FIG. 4 ; (2) the touch control unit 50 shown in FIG. 10 includes a fourth dummy electrode 503, the fourth dummy electrode 503 electrically insulates the second branch electrodes 5022 in two adjacent touch units 50 in the first direction; (3) the second electrode 502 shown in FIG. 10 further includes a first The branch electrodes 5023 and the second branch electrodes 5024 are connected. One end of the first branch electrode 5023 is connected to the second trunk electrode 5021, and the other end of the first branch electrode 5023 is connected to the second branch electrode 5022.
  • Each touch unit 50 The area enclosed by the first connecting branch electrode 5023, the second trunk electrode 5021 and the second branch electrode 5022 is provided with a fifth dummy electrode 504; one end of the second connecting branch electrode 5024 is connected to the second branch electrode 5022, and the second connecting branch The other end of the electrode 5024 is connected to the second connection branch electrode 5024 of the adjacent touch unit 50 in the second direction.
  • the first connection branch electrode 5023 , the second connection branch electrode 5024 , and the second trunk in the same touch unit 50 The area enclosed by the electrode 5021 and the second branch electrode 5022 is provided with a sixth dummy electrode 505 ; in the second direction, the adjacent two second branch electrodes 5022 and the adjacent two adjacent second connection branches of the two touch units 50 The area enclosed by the electrode 5024 is provided with the seventh dummy electrode 506 .
  • the performance test results of the touch unit shown in FIG. 4 and the touch unit shown in FIG. 10 are as follows.
  • the parasitic capacitance value of the first electrode shown in FIG. 4 is smaller than that of the first electrode shown in FIG. 10
  • the parasitic capacitance value of the second electrode shown in FIG. 4 is much smaller than that of the second electrode shown in FIG. 10 .
  • the parasitic capacitance value of makes the parasitic capacitance between the touch unit and the common cathode shown in FIG. 4 smaller, so the structure design of the touch unit shown in FIG. 4 is more conducive to improving the touch reporting rate.
  • the parasitic capacitance value of the first electrode shown in FIG. 4 is smaller than the parasitic capacitance value of the first electrode shown in FIG. 10
  • the capacitance value indicates that the ratio of the metal area of the first electrode to the metal area of the touch unit and the ratio of the metal area of the second electrode to the metal area of the touch unit shown in FIG. 4 are smaller.
  • the change value of the mutual capacitance of the touch control unit shown in FIG. 4 is slightly larger than that of the touch control unit shown in FIG. 10 .
  • the ratio of the mutual capacitance change of the touch unit shown in FIG. 4 to the total mutual capacitance is greater than the ratio of the mutual capacitance change to the total mutual capacitance of the touch unit shown in FIG. 10 , so FIG. 4
  • the touch unit shown has a higher touch sensitivity.

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Abstract

本申请提供一种触控组件及触控显示装置，通过第二分支电极包围对应的第一分支电极，与第一分支电极相邻的第三分支电极包围第二分支电极位于第一分支电极与第三分支电极之间的部分，配合在第一方向上分别位于相邻两个触控单元中的两个相邻第三分支电极远离与第一主干电极连接的一端互相连接，以提高触控组件的触控灵敏度。

Description

触控组件及触控显示装置 技术领域
本申请涉及触控显示技术领域，尤其涉及一种触控组件及触控显示装置。
背景技术
目前，对于柔性主动式有机发光二极管(Active Metrix Organic Light Emitting Diode，AMOLED)触控显示屏，触控电极图案通常为镂空的金属网格，导致手指触摸柔性主动式有机发光二极管触控显示屏时引起的电容变化量较小，电容变化量较小不容易被触控芯片检测到，影响触控灵敏度。另外，触控电极图案制作于薄膜封装层上，然而由于薄膜封装层较薄(通常厚度约10um)，因此触控电极图案与柔性主动式有机发光二极管显示面板的整面的阴极之间的距离较小，导致两者之间的寄生电容较大，进而导致阻容延时较大，影响触控报点率。
因此，有必要提出一种技术方案以提高柔性主动式有机发光二极管触控显示屏的触控灵敏度和触控报点率。
技术问题
本申请的目的在于提供一种触控组件及触控显示装置，触控组件和触控显示装置具有良好的触控灵敏度。
技术解决方案
一种触控组件，所述触控组件包括多个触控单元，每个所述触控单元包括第一电极和第二电极，所述第一电极与所述第二电极电性绝缘，
所述第一电极包括：
沿第一方向延伸的第一主干电极；
至少一个第一分支电极，自所述第一主干电极与第二主干电极相交处沿背离所述第一主干电极和所述第二主干电极的方向延伸；以及
至少一个第三分支电极，自所述第一主干电极沿背离所述第一主干电极和所述第二主干电极的方向延伸，且与至少一个所述第一分支电极相邻设置；
所述第二电极包括：
沿第二方向延伸的所述第二主干电极；以及
至少一个第二分支电极，自所述第一主干电极与第二主干电极相交处沿背离所述第一主干电极和所述第二主干电极的方向延伸；
其中，所述第二分支电极包围与所述第二分支电极对应的所述第一分支电极，且与所述第一分支电极相邻的所述第三分支电极包围所述第二分支电极位于所述第一分支电极和所述第三分支电极之间的部分；
在所述第一方向上，分别位于相邻两个所述触控单元中的相邻两个所述第三分支电极在远离所述第三分支电极与所述第一主干电极连接的一端相互连接，所述第一方向与所述第二方向相异。
一种触控显示装置，所述触控显示装置包括上述触控组件及显示面板，所述触控组件位于所述显示面板的出光侧。
有益效果
本申请提供一种触控组件及触控显示装置，通过第二分支电极包围对应的第一分支电极，与第一分支电极相邻的第三分支电极包围第二分支电极位于第一分支电极与第三分支电极之间的部分，以增加第一电极和第二电极之间的互电容，有利于提高触控组件及触控显示装置的触控灵敏度。另外，在第一方向上分别位于相邻两个触控单元中的两个相邻第三分支电极在远离与第一主干电极连接的一端互相连接，使得第一电极传输电信号的通道增加，改善阻容延时对电信号传输的影响，有利于提高触控组件以及触控显示装置的触控报点率。
附图说明
图1为本申请实施例的触控显示装置的截面示意图；
图2为图1中所示触控显示装置的显示面板的截面示意图；
图3为图1中所示触控显示装置的触控组件的截面示意图；
图4为图1中所示触控显示装置的触控组件的局部平面示意图；
图5为图4中一个触控单元的平面示意图；
图6为图5中所示触控单元的第一电极的平面示意图；
图7为图5中所示触控单元的第二电极的平面示意图；
图8为图4中所示触控组件的局部放大示意图；
图9为第一电极和第二电极由金属网格组成时触控组件对应显示面板的子像素的局部示意图；
图10为对比例触控单元的平面示意图。
附图标记如下：
100触控显示装置；10显示面板；20触控组件；30偏光片；40保护盖板；101基底；102薄膜晶体管阵列层；103有机发光二极管阵列层；104薄膜封装层；201第一电极；2011第一主干电极；20111第一子主干电极；2011a第一主干加宽部A；2011b第一主干加宽部B；2012第一分支电极；2012a加宽部；2012b收窄部；2012c第一凹部；2013第三分支电极；2013a第三凸起部；2013b第四凸起部；2013c第二连接部；2014第三连接部；2015第一电极延伸部；2015a第一电极延伸主干部；2015b第一电极延伸分支部；202第二电极；2021第二主干电极；20211第二子主干电极；2022桥接部；2023第二分支电极；2023a第一凸起部；2023b第二凸起部；2023c第一连接部；203缓冲层；204第一钝化层；205第二钝化层；20a触控单元；20b断开区域；206第一虚设电极；206a第五凸起部；207第二虚设电极；207a第六凸起部；208第三虚设电极。
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参阅图1，其为本申请实施例中触控显示装置的截面示意图。触控显示装置100包括显示面板10、触控组件20、偏光片30以及保护盖板40。触控组件20设置于显示面板10上且位于显示面板10的出光侧。偏光片30通过透明胶粘层与触控组件20连接，保护盖板40通过透明胶粘层与偏光片30连接。
显示面板10用于显示画面。显示面板10可以为液晶显示面板、有机发光二极管显示面板或者其他显示面板。具体地，如图2所示，其为图1中所示触控显示装置的显示面板的截面示意图，显示面板10为柔性有机发光二极管显示面板。显示面板10包括基底101、薄膜晶体管阵列层102、有机发光二极管阵列层103、薄膜封装层104。薄膜晶体管阵列层102设置于基底101上，有机发光二极管阵列层103设置于薄膜晶体管阵列层102上，薄膜封装层104设置于有机发光二极管阵列层103上。
基底101为柔性基底，基底101包括聚酰亚胺层。基底101也可以为玻璃基板。
薄膜晶体管阵列层102包括多个阵列排布的薄膜晶体管，薄膜晶体管可以为多晶硅晶体管、金属氧化物晶体管、非晶硅晶体管中的至少一种。薄膜晶体管可以为底栅型薄膜晶体管或顶栅型薄膜晶体管。薄膜晶体管阵列层102还可以包括电容器等器件。
有机发光二极管阵列层103包括多个独立的阳极、设置于阳极上的有机发光层以及共阴极，共阴极整面形成。阳极和共阴极的制备材料包括金属或/和透明金属氧化物。其中，金属包括银、铜或者其他金属。透明金属氧化物包括氧化铟锡、氧化铟锌中的至少一种。
薄膜封装层104用于阻挡水蒸气以及氧气等渗透至有机发光二极管阵列层103中，避免有机发光层和共阴极与水蒸气和/或氧气等接触缩短显示面板的使用寿命。薄膜封装层104的厚度为8微米-12微米。具体地，薄膜封装层104包括第一无机层、有机层以及第二无机层。第一无机层和第二无机层的制备材料包括氮化硅、氧化硅中的至少一种。有机层的制备材料包括聚酰亚胺、聚丙烯酸酯或者其他有机材料。薄膜封装层104的厚度通常为10微米。
如图3所示，其为图1中所示触控显示装置的触控组件的截面示意图。触控组件20包括缓冲层203、第一电极201、第二电极202、第一钝化层204以及第二钝化层205。第二电极202包括桥接部2022，桥接部2022设置于缓冲层203上。第一钝化层204覆盖桥接部2022和缓冲层203。第二电极202除桥接部2022之外的部分和第一电极201设置于第一钝化层204上。桥接部2022通过第一钝化层204上的过孔204a桥接第二电极202位于第一钝化层204上的部分。第二钝化层205覆盖第一电极201、第二电极202除桥接部2022之外的部分以及第一钝化层204。其中，缓冲层203、第一钝化层204以及第二钝化层205均为绝缘层，绝缘层为无机绝缘层或有机绝缘层。无机绝缘层的制备材料选自氮化硅、氧化硅中的至少一种，有机绝缘层的制备材料选自聚酰亚胺或者聚丙烯酸酯中的至少一个。
如图4-图7所示，图4为图1中所示触控显示装置的触控组件的局部平面示意图，图5为图4中一个触控单元的平面示意图，图6为图5所示触控单元的第一电极的平面示意图，图7为图5所示触控单元的第二电极的平面示意图。触控组件20包括多个阵列排布的触控单元20a。每个触控单元20a作为一个独立的功能单元实现触控功能。 每个触控单元20a的形状为正方形。
每个触控单元20a包括第一电极201和第二电极202，第一电极201与第二电极202电性绝缘。触控单元20a中的第一电极201和第二电极202构成互容式触控电极。其中，第一电极201为驱动电极，第二电极202为感应电极。
多个第一电极201在第一方向上电性连接且在第二方向上相互绝缘，在第一方向上并排设置的多个相邻的第一电极201组成第一电极通道。多个第二电极202在第二方向上电性连接且在第一方向上相互绝缘，在第二方向上并排设置的多个相邻的第二电极202组成第二电极通道。其中，第一方向和第二方向相异。
第一电极201和第二电极202可以由金属网格组成，其中，金属网格的制备材料选自钼、铝、钛、铜、银中的至少一种。第一电极201和第二电极202也可以由透明导电块组成，其中，透明导电块的制备材料选自氧化铟锡、氧化铟锌中的至少一种。具体地，第一电极201和第二电极202由金属网格组成。
如图9所示，其为第一电极和第二电极由金属网格组成时触控组件对应显示面板的子像素的局部示意图。显示面板10包括红色子像素R、绿色子像素G以及蓝色子像素B。组成第一电极201和第二电极202的金属网格环绕红色子像素R、绿色子像素G以及蓝色子像素B，一个金属网格环绕红色子像素R、绿色子像素G以及蓝色子像素B中的一者。金属网格环绕子像素设置，避免金属网格对子像素发出的光造成遮挡。第二电极202除桥接部2022之外的部分和第一电极201均是位于同一层金属网格层，第一电极201和第二电极202是通过将断开区域20b的金属网格切断，以实现两者之间电性绝缘。
在本实施例中，如图6所示，第一电极201包括第一主干电极2011、至少一个第一分支电极2012、至少一个第三分支电极2013、第三连接部2014以及第一电极延伸部2015。
第一主干电极2011沿第一方向延伸。第一主干电极2011是第一电极201传输电信号的主要通道，由金属网格组成的第一主干电极2011没有经过去除部分金属网格的处理，使得第一主干电极2011的电阻最小化，进而使得第一电极201的电阻较小，有利于避免阻抗较大对第一电极201传输的电信号造成延时，有利于提高触控组件的触控报点率。
至少一个第一分支电极2012自第一主干电极2011靠近第一主干 电极2011与第二主干电极2021相交处沿背离第一主干电极2011和第二主干电极2021的方向延伸。第一分支电极2012与第一主干电极2011之间的夹角为α，α大于0度且小于90度。
至少一个第三分支电极2013自第一主干电极2011沿背离第一主干电极2011和第二主干电极2021的方向延伸，且与至少一个第一分支电极2012相邻设置。第三分支电极2013与相邻的第一分支电极2012平行设置，故第三分支电极2013与第一主干电极2011之间的夹角可以等于第一分支电极2012与第一主干电极2011之间的夹角。可以理解的是，第三分支电极2013与第一主干电极2011之间的夹角也可以不等于第一分支电极2012与第一主干电极2011之间的夹角，且第三分支电极2013与相邻的第一主干电极2011也不相交。
在本实施例中，至少一个第一分支电极2012由第一主干加宽部A 2011a处延伸出，至少一个第三分支电极2013由第一主干加宽部B 2011b处延伸出，第一主干加宽部A 2011a和第一主干加宽部B 2011b处的电阻较小，有利于电信号从第一主干电极2011传输至至少一个第一分支电极2012和至少一个第三分支电极2013，且有利于电性连接第一主干加宽部A 2011a处延伸出的至少一个第一分支电极2012和由第一主干加宽部B 2011b处延伸出的至少一个第三分支电极2013。其中，第一主干加宽部A 2011a的面积大于与第一主干加宽部B 2011b的面积。
具体地，第一电极201关于第一主干电极2011和第二主干电极2021对称设置，第一主干电极2011包括关于第二主干电极2021对称设置的两个第一子主干电极20111，第三连接部2014连接第一主干电极2011的两个第一子主干电极20111，每个第一子主干电极20111的每一侧均延伸出一个第一分支电极2012以及一个第三分支电极2013，且第一分支电极2012和第三分支电极2013与第一子主干电极20111之间的夹角α为45度。
如图7所示，第二电极202包括第二主干电极2021、桥接部2022以及至少一个第二分支电极2023。
第二主干电极2021沿第二方向延伸。第一主干电极2011与第二主干电极2021在触控单元20a的中心位置处相交。第二主干电极2021是第二电极202传输电信号的主要通道，由金属网格组成的第二主干电极2021没有经过去除部分金属网格的处理，使得第二主干电极2021的电阻最小化，进而使得第二电极202的电阻较小，有利于避 免阻抗较大对第二电极202传输的电信号造成延时，进一步有利于提高触控组件的触控报点率。
至少一个第二分支电极2023自第二主干电极2021靠近第一主干电极2011与第二主干电极2021相交处沿背离第一主干电极2011和第二主干电极2021的方向延伸。第二分支电极2023与第二主干电极2021之间的夹角为β，β大于0且小于90度。
具体地，第二电极202关于第一主干电极2011和所述第二主干电极2021对称设置；第二主干电极2021包括关于第一主干电极2011对称设置的两个第二子主干电极20211，桥接部2022桥接第二主干电极2021的两个第二子主干电极20211，每个第二子主干电极20211的每一侧均延伸出一个第二分支电极2023，且第二分支电极2023与第二子主干电极20211之间的夹角β为45度。
在本实施例中，第二分支电极2023包围与第二分支电极2023对应的第一分支电极2012，且与第一分支电极2012相邻的第三分支电极2013包围第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分。通过第二分支电极2023包围对应的第一分支电极2012，配合第三分支电极2013包围第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分，以增加第一电极201和第二电极202之间的互电容，有利于提高互电容变化量，进而有利于提高触控灵敏度。
需要说明的是，至少一个第一分支电极2012和至少一个第三分支电极2013主要用于与至少一个第二分支电极2023产生互电容，至少一个第一分支电极2012、至少一个第三分支电极2013与至少一个第二分支电极2023之间互电容会影响互电容变化量。手指等接触触控组件20过程中，互电容变化量变化越大，则触控灵敏度越高。
另外，每个第一子主干电极20111的每一侧延伸出多个第三分支电极2013时，仅有一个第三分支电极2013包围第二分支电极2023且与第二分支电极2023之间产生互电容，其他第三分支电极2013与第二分支电极2023之间的互电容较少，且多个第三分支电极2013与共阴极之间的寄生电容较大，会导致第一电极与共阴极之间的寄生电容较大。本申请的每个第一子主干电极20111的每一侧仅延伸出一个第三分支电极2013，更有利于降低第一电极与共阴极之间的寄生电容。
在本实施例中，如图4所示，在第一方向上，分别位于相邻两个 触控单元20a中的相邻两个第三分支电极2013在远离第三分支电极2013与第一主干电极2011连接的一端相互连接；在第二方向上，分别位于相邻两个触控单元20a中的相邻两个第二分支电极2023在远离第二分支电极2023与第二主干电极2021连接的一端相互连接。
在第一方向上，分别位于相邻两个触控单元20a中的相邻两个第三分支电极2013连接，使得第一电极201传输的电信号除了可以通过第一主干电极2011传输，还可以通过连接的两个第三分支电极2013传输，使得电信号在相邻两个触控单元20a的第一电极201上的传输通道增加，改善阻容延时影响电信号传输的问题。在第二方向上，分别位于相邻两个触控单元20a中的相邻两个第二分支电极2023连接，使得第二电极202传输的电信号除了可以通过第二主干电极2021传输，还可以通过连接的两个第二分支电极2023传输，使得电信号在相邻两个触控单元20a的第二电极202上的传输通道增加，进一步地改善阻容延时影响电信号传输的问题。此外，第一电极201的电信号传输通道增加，配合第二电极202的电信号传输通道增加，避免阻容延时过大导致的触控单元充电不足导致的触控报点率降低问题，有利于提高触控报点率。
相对于传统技术，本申请通过增设第三分支电极2013，第三分支电极2013包围第二分支电极2023的部分，配合第二分支电极2023包围第一分支电极2012，以提高第一电极201和第二电极202之间的互电容，进而有利于提高互电容变化量，从而有利于提高触控组件的触控灵敏度。另外，第一方向上相邻两个触控单元20a中的相邻两个第三分支电极2013连接，增加第一电极201的电信号传输通道，有利于提高触控组件的触控报点率。
在本实施例中，在第二方向上，分别位于相邻两个触控单元20a中的相邻两个第二分支电极2023与第二主干电极2021围合的区域设置有第一虚设电极206，第一虚设电极206与第二电极202电性绝缘，第二分支电极2023位于第一虚设电极206与第一分支电极2012之间的部分分别与第一分支电极2012、第一虚设电极206相互咬合。
需要说明的是，在传统设计中，在第一分支电极2012与第二分支电极2023咬合的情况下，第一虚设电极206与第二分支电极2023之间的边界是直线型边界，即，不存在本实施例中第一虚设电极206与第二分支电极2023相互咬合的情况。也就是说，图5中与第二分支电极2023咬合的第一虚设电极206的部分在传统设计中被取代设 置为第二分支电极2023，然而该部分的第二分支电极2023距离对应的第一分支电极2012较远，因而两者之间的互电容较小，所以去除该部分的第二分支电极2023并不会影响第一分支电极2012和第二分支电极2023之间的互电容。有鉴于此，在第一分支电极2012与第二分支电极2023相互咬合的前提下，本申请通过第一虚设电极206与第二分支电极2023相互咬合，以使得部分第一虚设电极206替代传统设计中与第一分支电极2012形成较小互电容的第二分支电极2023的部分，以保证第一分支电极2012与第二分支电极2023之间的互电容的同时，进一步地减小第二分支电极2023的面积，进而保证触控灵敏度的同时，提高触控报点率。
相对于传统技术，本申请去除第二分支电极2023的部分且填充第一虚设电极206，在保证第二分支电极2023与第一分支电极2012、第三分支电极2013之间的互电容的情况下，减小第二分支电极2023的面积，进而减少第二分支电极2023与共阴极之间的寄生电容，改善寄生电容对第二电极202传输的电信号造成的延时。第一虚设电极206保证显示面板10发出的光经过触控组件20后的均匀性。另外，通过第二分支电极2023位于第一虚设电极206与第一分支电极2012之间的部分与第一分支电极2012、第一虚设电极206相互咬合，使得第二分支电极2023与第一分支电极2012之间的咬合边界增加，以增加第二分支电极2023与第一分支电极2012之间的互电容的同时，进一步地减小第二分支电极2023的面积从而使得第二分支电极2023与共阴极之间的寄生电容进一步地减小，有利于提升触控组件的触控灵敏度和触控报点率。
在第一方向上，分别位于相邻两个触控单元20a中的相邻两个第三分支电极2013与第一主干电极2011围合的区域设置有第二虚设电极207，第二虚设电极207与第一电极201电性绝缘，第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分分别与第一分支电极2012、第三分支电极2013相互咬合，以使得第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分与第一分支电极2012、第三分支电极2013之间的咬合边界增加，进一步地增加第一电极201与第二电极202之间的互电容，更有利于提高触控灵敏度。
进一步地，因为在第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分分别与第一分支电极2012、第三分支 电极2013相互咬合的情况下，第三分支电极2013与第二虚设电极207之间的边界为直线时，即图5中第二虚设电极207与第三分支电极2013咬合的部分为第三分支电极2013时，该部分第三分支电极2013与对应的第二分支电极之间的间距远，而导致两者之间的互电容较小，且该部分第三分支电极2013与共阴极之间的互电容较大。鉴于此，本申请通过第三分支电极2013与第二虚设电极207相互咬合，以使第二虚设电极207取代与第二分支电极形成较小互电容的第三分支电极2013，在保证第一电极201与第二电极202之间的互电容的同时，使得第三分支电极2013的面积最小化，进一步地减小第三分支电极2013与共阴极之间的寄生电容，更有利于提高触控组件的触控报点率和触控灵敏度。
具体地，结合图5和图6，第一分支电极2012包括多个加宽部2012a以及多个收窄部2012b，加宽部2012a与收窄部2012b交替连接，且收窄部2012b连接于加宽部2012a宽度方向上的中间位置。加宽部2012a的形状为矩形，收窄部2012b的形状为矩形，加宽部2012a的宽度大于收窄部2012b的宽度。相邻两个加宽部2012a和对应的收窄部2012b围合成第一凹部2012c。收窄部2012b在第一分支电极2012的宽度方向上围绕两个以上子像素。加宽部2012a的数目可以2个、3个、4个或者4个以上。具体地，本实施例中加宽部2012a的数目为4个。
第三分支电极2013包括第三凸起部2013a、第四凸起部2013b以及第二连接部2013c。第三凸起部2013a连接于第二连接部2013c远离第一分支电极2012的一侧，第四凸起部2013b连接于第二连接部2013c靠近第一分支电极2012的一侧，第三凸起部2013a、第四凸起部2013b交替地沿着第二连接部2013c排布。第三凸起部2013a对应加宽部2012a设置，第四凸起部2013b对应收窄部2012b设置。
第二分支电极2023包括与加宽部2012a对应的第一凸起部2023a、与收窄部2012b对应的第二凸起部2023b以及第一连接部2023c，第一凸起部2023a连接于第一连接部2023c远离第一分支电极2012的一侧，第二凸起部2023b连接于第一连接部2023c靠近第一分支电极2012的一侧，第一凸起部2023a、第二凸起部2023b交替地沿着第一连接部2023c排布。第二凸起部2023b设置于第一凹部2012c中，使得第二凸起部2023b与加宽部2012a相互咬合。
如图5所示，第一虚设电极206包括第五凸起部206a，第二虚 设电极207包括第六凸起部207a。第六凸起部207a与第三分支电极2013的第三凸起部2013a相互咬合，第四凸起部2013b与第二分支电极2023的第一凸起部2023a相互咬合。第五凸起部206a与第二分支电极2023的第二凸起部2023b相互咬合。其中，第五凸起部206a为上述第一虚设电极206取代部分第二分支电极2023的部分，第六凸起部207a为上述第二虚设电极207取代部分第三分支电极2013的部分。
在本实施例中，第一凸起部2023a与第二凸起部2023b相同，即第一凸起部2023a的形状与第二凸起部2023b的形状相同，且第一凸起部2023a的尺寸与第二凸起部2023b的尺寸相同。第三凸起部2013a与第四凸起部2013b相同，即第三凸起部2013a的形状与第四凸起部2013b的形状相同，第三凸起部2013a的尺寸与第四凸起部2013b的尺寸相同。第一凸起部2023a与第三凸起部2013a相同，且第二连接部2013c的宽度和第一连接部2023c的宽度相同，故第三分支电极2013与第二分支电极2023位于第一分支电极2012和第三分支电极2013之间的部分采用相似设计，且第三分支电极2013与第二分支电极2023位于第一分支电极2012和第一虚设电极206之间的部分采用相似设计。
在本实施例中，第一电极延伸部2015的一端与在第一方向上分别位于相邻两个触控单元20a中的相邻两个第三分支电极2013的连接处连接，第一电极延伸部2015的另一端延伸至在第二方向上相邻两个触控单元20a交界处且与相邻的第一电极延伸部2015对应的一端电性绝缘。第一电极延伸部2015起到在第一方向上电性隔离第二电极202的作用，第一电极延伸部2015也起到与第二分支电极2023形成互电容的作用。
具体地，如图4和图6所示，第一电极延伸部2015包括第一电极延伸主干部2015a以及由第一电极延伸主干部2015a延伸出的两个第一电极延伸分支部2015b，第一电极延伸部2015的两个第一电极延伸分支部2015b围合的区域设置有第三虚设电极208，第三虚设电极208与第一电极201电性绝缘，以保证第一电极延伸分支部2015b与第二分支电极2023形成较大的互电容的同时，保证第一电极延伸部2015b的面积最小。其中，第一电极延伸主干部2015a平行于第二主干电极2021，第一电极延伸分支部2015b为V型。
另外，如图8所示，在第二方向上相邻两个第一电极延伸分支部 2015b之间绝缘，具体是通过切断金属网格且在相邻两个第一电极延伸分支部2015b之间的间隙设置第三虚设电极208实现的。
本申请通过第二电极的第二分支电极包围第一电极的第一分支电极，与第一分支电极相邻的第三分支电极包围第二分支电极的部分，第三分支电极与第一分支电极平行设置，且多个第一分支电极、多个第二分支电极以及多个第三分支电极均关于第一主干电极、第二主干电极对称设置，可以有效提高第一电极和第二电极之间的互容值，同时使得互容电场线分布的更加均匀，更加有利于提高检测触摸位置的分辨率和精准度。而且，第一电极可以通过第一主干电极以及第三分支电极在相邻触控单元之间传输电信号，第二电极可以通过第二主干电极以及第二分支电极在相邻触控单元之间传输电信号，使得在第一方向上和第二方向上的相邻触控单元之间的接触阻抗降低，从而降低第一电极通道和第二电极通道的阻抗，有利于提高触控报点率。另外，第一虚设电极能有效减少第一电极与共阴极的寄生电容，配合第二虚设电极和第三虚设电极能有效减小第二电极与共阴极的寄生电容，可以明显改善整个触控单元与共阴极之间的阻容延时，从而有利于提高触控报点率。且第一虚设电极、第二虚设电极以及第三虚设电极也用于保持显示面板的像素的出光均匀性。
综上所述，本申请触控组件的触控单元可以提升手指触控时信号量以保证触控灵敏度的前提下，避免阻容延时过大导致的触摸单元充电不足引起的触摸屏触控频率下降从而影响报点率等关键触摸性能指标的问题，进而使得触控显示装置的触控性能提升。
如图10所示，其为对比例触控单元的平面示意图。图10所示触控单元50与图4所示触控单元基本相似，相同之处在于，图10所示触控单元包括第一电极501以及第二电极502，第一电极501包括沿第一方向延伸的第一主干电极5011以及第一分支电极5012，第二电极502包括沿第二方向延伸的第二主干电极5021以及第二分支电极5022，第二分支电极5022包围对应的第一分支电极5012，在第二方向上相邻两个触控单元50的第二分支电极5022在远离第二分支电极5022与第二主干电极5021连接的一端连接。不同之处在于包括：(1)图10所示触控单元50的第一电极501没有延伸出图4所示第三分支电极；(2)图10所示触控单元50包括第四虚设电极503，第四虚设电极503使在第一方向上的相邻两个触控单元50中的第二分支电极5022之间电性绝缘；(3)图10所示第二电极502还包括第一连接分 支电极5023以及第二连接分支电极5024，第一连接分支电极5023的一端连接第二主干电极5021，且第一连接分支电极5023的另一端连接第二分支电极5022，每个触控单元50的第一连接分支电极5023、第二主干电极5021以及第二分支电极5022围合的区域设置有第五虚设电极504；第二连接分支电极5024的一端连接第二分支电极5022，第二连接分支电极5024的另一端与第二方向上相邻触控单元50的第二连接分支电极5024连接，同一个触控单元50中的第一连接分支电极5023、第二连接分支电极5024、第二主干电极5021以及第二分支电极5022围合的区域设置有第六虚设电极505；在第二方向上两个触控单元50的相邻两个第二分支电极5022、相邻两个第二连接分支电极5024围合的区域设置有第七虚设电极506。图4所示触控单元与图10所示触控单元的性能测试结果如下表。
Figure PCTCN2020141437-appb-000001
由上表可知，图4所示第一电极的寄生电容值小于图10所示第一电极的寄生电容值，且图4所示第二电极的寄生电容值远小于图10所示第二电极的寄生电容值，使得图4所示触控单元与共阴极之间的寄生电容更小，故图4所示触控单元的结构设计更有利于触控报点率提高。另外，在图4所示第一电极的寄生电容值小于图10所示第一电极的寄生电容值，且图4所示第二电极的寄生电容值远小于图10所示第二电极的寄生电容值，表明图4所示第一电极的金属面积与触控单元的金属面积的比值、第二电极的金属面积与触控单元的金属面积的比值更小。在图4所示触控单元的第一电极面积占比、第二电极面积占比均更小的情况下，图4所示触控单元的互电容变化值稍微大于图10所示触控单元的互电容变化值，且图4所示触控单元的互电容变化值与总互电容值的比值大于图10所示触控单元的互电容 变化值与总互电容值的比值，故图4所示触控单元的触控灵敏度更高。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (15)

  1. 一种触控组件，其中，所述触控组件包括多个触控单元，每个所述触控单元包括第一电极和第二电极，所述第一电极与所述第二电极电性绝缘，
    所述第一电极包括：
    沿第一方向延伸的第一主干电极；
    至少一个第一分支电极，自所述第一主干电极与第二主干电极相交处沿背离所述第一主干电极和所述第二主干电极的方向延伸；以及
    至少一个第三分支电极，自所述第一主干电极沿背离所述第一主干电极和所述第二主干电极的方向延伸，且与至少一个所述第一分支电极相邻设置；
    所述第二电极包括：
    沿第二方向延伸的所述第二主干电极；以及
    至少一个第二分支电极，自所述第一主干电极与第二主干电极相交处沿背离所述第一主干电极和所述第二主干电极的方向延伸；
    其中，所述第二分支电极包围与所述第二分支电极对应的所述第一分支电极，且与所述第一分支电极相邻的所述第三分支电极包围所述第二分支电极位于所述第一分支电极和所述第三分支电极之间的部分；
    在所述第一方向上，分别位于相邻两个所述触控单元中的相邻两个所述第三分支电极在远离所述第三分支电极与所述第一主干电极连接的一端相互连接，所述第一方向与所述第二方向相异。
  2. 根据权利要求1所述的触控组件，其中，在所述第二方向上，分别位于相邻两个所述触控单元中的相邻两个所述第二分支电极与所述第二主干电极围合的区域设置有第一虚设电极，所述第一虚设电极与所述第二电极电性绝缘；
    所述第二分支电极位于所述第一虚设电极与所述第一分支电极之间的部分分别与所述第一分支电极和所述第一虚设电极相互咬合。
  3. 根据权利要求1所述的触控组件，其中，在所述第二方向上，分别位于相邻两个所述触控单元中的相邻两个所述第二分支电极在远离所述第二分支电极与第二主干电极连接的一端相互连接。
  4. 根据权利要求1所述的触控组件，其中，所述第二分支电极位于所述第一分支电极和所述第三分支电极之间的部分分别与所述第一分支电极和所述第三分支电极相互咬合。
  5. 根据权利要求4所述的触控组件，其中，在所述第一方向上，分别位于相邻两个所述触控单元中的相邻两个所述第三分支电极与所述第一主干电极围合的区域设置有第二虚设电极，所述第二虚设电极与所述第一电极电性绝缘，所述第三分支电极与所述第二虚设电极相互咬合。
  6. 根据权利要求4所述的触控组件，其中，所述第一分支电极包括多个加宽部以及多个收窄部，所述加宽部与所述收窄部交替连接；
    所述第二分支电极包括与所述加宽部对应的第一凸起部、与所述收窄部对应的第二凸起部以及第一连接部，所述第一凸起部连接于所述第一连接部远离所述第一分支电极的一侧，所述第二凸起部连接于所述第一连接部靠近所述第一分支电极的一侧，所述第一凸起部、所述第二凸起部交替地沿着所述第一连接部排布；
    所述第三分支电极包括与所述第一凸起部对应的第三凸起部、与所述第二凸起部对应的第四凸起部以及第二连接部，所述第三凸起部连接于所述第二连接部远离所述第一分支电极的一侧，所述第四凸起部连接于所述第二连接部靠近所述第一分支电极的一侧，所述第三凸起部、所述第四凸起部交替地沿着所述第二连接部排布。
  7. 根据权利要求6所述的触控组件，其中，所述第一凸起部与所述第二凸起部相同，所述第三凸起部与所述第四凸起部相同，所述第一凸起部与所述第三凸起部相同。
  8. 根据权利要求1所述的触控组件，其中，所述第三分支电极与相邻的所述第一分支电极平行设置。
  9. 根据权利要求1所述的触控组件，其中，所述触控组件还包括多个第一电极延伸部，所述第一电极延伸部的一端与相邻两个所述触控单元中的相邻两个所述第三分支电极的连接处连接，所述第一电极延伸部的另一端延伸至所述第二方向上的相邻两个所述触控单元交界处，且相邻两个所述第一电极延伸部之间电性绝缘。
  10. 根据权利要求9所述的触控组件，其中，所述第一电极延伸部包括第一电极延伸主干部以及由所述第一电极延伸主干部延伸出的两个第一电极延伸分支部，两个所述第一电极延伸分支部围合的区域设置有第三虚设电极，所述第三虚设电极与所述第一电极电性绝缘。
  11. 根据权利要求1所述的触控组件，其中，所述第一分支电极与所述第一主干电极之间的夹角为α，所述α大于0度且小于90度；
    所述第二分支电极与所述第二主干电极之间的夹角为β，所述β大于0且小于90度。
  12. 根据权利要求11所述的触控组件，其中，所述α和所述β均为45度，所述第一方向与所述第二方向垂直。
  13. 根据权利要求1所述的触控组件，其中，所述第一电极关于所述第一主干电极和所述第二主干电极对称设置，所述第二电极关于所述第一主干电极和所述第二主干电极对称设置；
    所述第一主干电极包括关于所述第二主干电极对称设置的两个第一子主干电极，所述第一主干电极的两个所述第一子主干电极通过第三连接部连接；
    所述第二主干电极包括关于所述第一主干电极对称设置的两个第二子主干电极，所述第二主干电极的两个所述第二子主干电极通过桥接部桥接。
  14. 根据权利要求13所述的触控组件，其中，每个所述第一子主干电极的每一侧均延伸出一个所述第一分支电极以及一个所述第三分支电极；
    每个所述第二子主干电极的每一侧均延伸出一个所述第二分支电极。
  15. 一种触控显示装置，其中，所述触控显示装置包括如权利要求1所述的触控组件及显示面板，所述触控组件位于所述显示面板的出光侧。
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