WO2021238795A1 - 触控面板及其制备方法、显示装置 - Google Patents

触控面板及其制备方法、显示装置 Download PDF

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Publication number
WO2021238795A1
WO2021238795A1 PCT/CN2021/095167 CN2021095167W WO2021238795A1 WO 2021238795 A1 WO2021238795 A1 WO 2021238795A1 CN 2021095167 W CN2021095167 W CN 2021095167W WO 2021238795 A1 WO2021238795 A1 WO 2021238795A1
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WIPO (PCT)
Prior art keywords
touch
electrode
touch electrode
substrate
electrodes
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PCT/CN2021/095167
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English (en)
French (fr)
Inventor
项大林
薄赜文
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/760,771 priority Critical patent/US11861124B2/en
Publication of WO2021238795A1 publication Critical patent/WO2021238795A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • G06F3/0412—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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • 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
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the embodiments of the present disclosure relate to, but are not limited to, the field of touch technology, and specifically relate to a touch panel, a manufacturing method thereof, and a display device.
  • OLED Organic Light Emitting Diode
  • OLED Organic Light Emitting Diode
  • Transparent display is an important branch of display technology. It refers to image display in a transparent state. The viewer can not only see the image in the display device, but also the scene behind the display device, which can realize virtual reality/augmented reality ( Virtual Reality/Augmented Reality, VR/AR) and 3D display functions.
  • VR/AR Virtual Reality/Augmented Reality
  • a curved surface is designed around the existing display substrate.
  • a curved surface 10 is formed at the edge of the display substrate; or, as shown in FIG. 2, a curved surface 10 is formed at the corner of the display substrate.
  • the existing externally mounted touch screen has a groove design to facilitate the stretching and fitting of the touch screen, and at the same time reduce the damage to the key components of the touch screen during stretching. Due to the horizontal and vertical grooves on the touch screen, the touch metal grid has a single trace, poor grid connectivity, high wiring resistance, and RC delay. In addition, due to the grooves, the metal grid spacing is large. The basic mutual capacitance value is low, the amount of touch change that occurs during touch is low, and the touch accuracy is poor.
  • an embodiment of the present disclosure provides a touch panel, including a substrate, a plurality of spaced first touch electrodes arranged on the substrate and extending along a first direction, and a touch panel extending along the first direction.
  • a plurality of second touch electrodes arranged at intervals, the first touch electrodes and the second touch electrodes are insulated from each other, and the first touch electrodes and the second touch electrodes cross each other to form a first fork Finger structure, the side portion of the first touch electrode is formed with a first curved portion extending to the outside of the first touch electrode, or the side portion of the second touch electrode is formed with a side portion toward the first touch electrode.
  • a second curved portion extending outside of the two touch electrodes.
  • the side portion of the first touch electrode is formed with a first curved portion extending to the outside of the first touch electrode
  • the side portion of the second touch electrode is formed with a direction A second curved portion extending outside the second touch electrode.
  • the first curved portion is located on a side of the first touch electrode close to the second touch electrode, and the second curved portion is located close to the second touch electrode.
  • the side portion on one side of the first touch electrode, and the first curved portion and the second curved portion cross each other to form a second interdigital structure.
  • it further includes a plurality of spaced first connection electrodes disposed on the substrate and extending along the second direction, and a plurality of spaced first touch electrodes are disposed on the first connection electrode. Electrodes, and the first touch electrodes are electrically connected through the first connecting electrodes.
  • At least two second connection electrodes are connected between adjacent first connection electrodes, and the second connection electrodes are located on opposite two of the first touch electrodes on the first connection electrodes. On the side, adjacent to the first connection electrode and the second connection electrode form a ring structure.
  • it further includes a plurality of spaced third connection electrodes arranged on the substrate and extending along the second direction, and a plurality of spaced second touch electrodes are provided on the third connection electrode. Electrodes, and the second touch electrodes are electrically connected through the third connecting electrodes.
  • the second touch electrodes adjacent in the first direction are connected by a bridge structure.
  • At least two bridge structures are provided on the touch panel.
  • it further includes a groove provided on the substrate, and the orthographic projection of the first touch electrode and the second touch electrode on the substrate is in the same position as the groove.
  • the orthographic projection on the substrate does not overlap, and the first touch electrode and/or the second touch electrode form the first curved portion and/or the second curved portion at the groove .
  • it further includes a floating electrode disposed on the substrate, the floating electrode is disposed in the same layer as the first touch electrode and the second touch electrode, and the floating electrode is disposed on the same layer as the first touch electrode and the second touch electrode.
  • the first touch electrode and the second touch electrode are insulated from each other.
  • the first touch electrode and the second touch electrode are both in a grid structure.
  • it further includes a plurality of sub-pixels disposed on the substrate, the grid structure is disposed on the sub-pixels, and in the grid structure, each grid corresponds to one or one A group of sub-pixels, the projection of the one or a group of sub-pixels on the plane where the grid is located falls into the corresponding grid.
  • embodiments of the present disclosure also provide a display device, including the aforementioned touch panel.
  • the embodiments of the present disclosure also provide a method for manufacturing a touch panel, including:
  • first touch electrode and the second touch electrode are insulated from each other, the first touch electrode and the second touch electrode cross each other to form a first interdigital structure, and the first touch
  • the side portion of the electrode is formed with a first curved portion extending to the outside of the first touch electrode, or the side portion of the second touch electrode is formed with a first curved portion extending to the outside of the second touch electrode. Two bends.
  • FIG. 1 is a top view 1 showing the substrate
  • Figure 2 is a top view 2 of the substrate
  • FIG. 3 is a top view of a touch panel according to an embodiment of the disclosure.
  • FIG. 4 is a partially enlarged schematic diagram of a touch panel according to an embodiment of the disclosure.
  • Figure 5 is a cross-sectional view of a bridge structure provided by an embodiment of the disclosure.
  • installation should be interpreted broadly unless otherwise clearly defined and defined.
  • it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate piece, or a connection between two components.
  • connection can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate piece, or a connection between two components.
  • the "about” in the present disclosure refers to a value that does not strictly limit the limit and allows the process and measurement error range.
  • the main structure of the touch panel of the embodiment of the present disclosure includes a substrate, a plurality of spaced first touch electrodes arranged on the substrate and extending along a first direction, and a plurality of spaced first touch electrodes extending along the first direction.
  • Two touch electrodes, the first touch electrode and the second touch electrode are insulated from each other, the first touch electrode and the second touch electrode cross each other to form a first interdigital structure, and the first touch electrode
  • a side portion of a touch electrode is formed with a first curved portion extending to the outer side of the first touch electrode, or a side portion of the second touch electrode is formed with a side portion toward the outer side of the second touch electrode The extended second bend.
  • the side portion of the first touch electrode is formed with a first bent portion
  • the side portion of the second touch electrode is formed with a second bent portion
  • the touch substrate of the embodiment of the present disclosure increases the extension length of the first touch electrode and the second touch electrode through the first interdigital structure formed by the first touch electrode and the second touch electrode, and increases the mutual capacitance during touch Sensing amount to improve the sensitivity of the touch panel.
  • a first curved portion is formed on the side of the first touch electrode, and/or a second curved portion is formed on the side of the second touch electrode, thereby further increasing the first touch electrode.
  • the extension length of the second touch electrode and the second touch electrode increase the mutual capacitance sensitivity during touch and improve the sensitivity of the touch panel.
  • FIG. 3 is a top view of a touch panel according to an embodiment of the disclosure.
  • the planar structure of the touch panel includes a substrate 1, a plurality of spaced first touch electrodes 2 arranged on the substrate 1 and extending along a first direction, and a plurality of spaces extending along the first direction.
  • the second touch electrode 3 is provided, the first touch electrode 2 and the second touch electrode 3 are insulated from each other, and the first touch electrode 2 and the second touch electrode 3 intersect to form a first interdigital structure. And the first touch electrodes 2 and the second touch electrodes 3 are alternately arranged along the second direction.
  • the side portion of the first touch electrode 2 is formed with a first curved portion 201 extending to the outside of the first touch electrode 2, and the side portion of the second touch electrode 3 is formed with a portion extending to the outside of the second touch electrode 3.
  • the first curved portion 201 and the second curved portion 301 extend along the second direction. Wherein, the first direction crosses the second direction, for example, the first direction is perpendicular to the second direction.
  • the first touch electrodes 2 in the first direction are all located in the gaps formed by the second touch electrodes 3 in the first direction.
  • the second touch electrodes 3 in the first direction They are all located in the gap formed by the first touch electrode 2 in the first direction, thus forming a first interdigital structure.
  • the first bent portion 201 is located on the side of the first touch electrode 2 close to the second touch electrode 3, that is, the first bent portion 201 is located on the first touch electrode 2 and the second touch electrode.
  • the second bent portion 301 is located on the side of the second touch electrode 3 close to the first touch electrode 2, that is, the second bent portion 301 is located between the first touch electrode 2 and the second touch electrode 3.
  • the first curved portion 201 and the second curved portion 301 cross each other to form a second interdigital structure.
  • the first curved portion 201 and the second curved portion 301 are alternately arranged along the first direction.
  • the first curved portion 201 and the second curved portion 301 form a second interdigital structure, thereby further increasing the mutual capacitance sensitivity during touch and improving the sensitivity of the touch panel.
  • the first curved portions 201 are all located in the gap formed by the second curved portion 301, and similarly, the second curved portions 301 are all located in the gap formed by the first curved portion 201, thus forming the second fork. Refers to the structure.
  • the touch panel of the embodiment of the present disclosure further includes a plurality of first connecting electrodes 202 arranged on the substrate 1 and extending along the second direction.
  • the first touch electrodes 2 are arranged at intervals in two directions, and the first touch electrodes 2 on the first connecting electrodes 202 are electrically connected through the first connecting electrodes 202, thereby reducing the resistance of the first touch electrodes 2.
  • the substrate 1 is provided with two first connecting electrodes 202 extending in the second direction, and a plurality of first touch electrodes arranged at intervals along the second direction are formed on both sides of the two first connecting electrodes 202, respectively. Electrode 2.
  • two second connecting electrodes 203 are connected between adjacent first connecting electrodes 202, and the second connecting electrodes 203 electrically connect the adjacent first connecting electrodes 202.
  • the two second connection electrodes 203 are located on opposite sides of the first touch electrode 2 on the first connection electrode 202, so that the adjacent first connection electrode 202 and the two second connection electrodes 203 form a ring structure, thereby reducing the first connection electrode.
  • a third bending portion 204 is formed on opposite sides of the second connection electrode 203.
  • the third bending portion 204 can increase the extension length of the second connection electrode 203 and reduce the resistance of the second connection electrode 203.
  • the touch panel of the embodiment of the present disclosure further includes a plurality of spaced third connecting electrodes 302 arranged on the substrate 1 and extending along the second direction.
  • the third connecting electrodes 302 are provided with a plurality of The second touch electrodes 3 arranged at intervals in two directions, and the second touch electrodes 3 on the third connecting electrodes 302 are electrically connected through the third connecting electrodes 302, thereby reducing the resistance of the second touch electrodes 3.
  • first connection electrode 202, the second connection electrode 203, and the third connection electrode 302 and the first touch electrode 2 and the second touch electrode 3 may be arranged in the same layer and directly connected;
  • the electrode 202, the second connection electrode 203, and the third connection electrode 302 and the first touch electrode 2 and the second touch electrode 3 may be arranged in the same layer or in different layers, and are connected by a bridge.
  • the second touch electrodes 3 adjacent to each other in the first direction are connected through the bridge structure 7, thereby reducing the resistance of the second touch electrodes 3.
  • the touch panel is provided with at least two bridge structures 7.
  • the touch panel in the embodiment of the present disclosure is provided with four bridge structures 7.
  • the touch panel of the embodiment of the present disclosure further includes a plurality of grooves 4 arranged on the substrate 1, and the orthographic projection of the first touch electrode 2 and the second touch electrode 3 on the substrate 1 and The orthographic projection of the groove 4 on the substrate 1 does not overlap, that is, the first touch electrode 2 and the second touch electrode 3 are routed in the peripheral area of the groove 4.
  • the first touch electrode 2 and/or the second touch electrode 3 form a first curved portion 201 and/or a second curved portion 301 at the groove 4.
  • first touch electrode 2 and the second touch electrode 3 form a first bend 201 and a second bend 301 at the groove 4; or, the first touch electrode 2 forms a first bend at the groove 4 201; or, the second touch electrode 3 forms a second curved portion 301 at the groove 4.
  • the groove 4 may be a strip groove extending in the first direction, or a strip groove extending in the second direction.
  • the groove 4 is used to provide a deformation amount when the touch panel is deformed.
  • the groove 4 can take a variety of shapes, such as rectangular, diamond, or irregular polygon shapes, which are not limited in this embodiment.
  • the touch substrate of the embodiment of the present disclosure is provided with grooves 4, so that when the touch panel is flexibly deformed (eg, stretched, curled, folded), the amount of deformation is concentrated in the grooves 4, so that the first touch electrode 2 and The coupling capacitance area of the second touch electrode 3 is located in a non-groove area with less tensile deformation, thereby reducing the variation of the coupling capacitance between the first touch electrode 2 and the second touch electrode 3, and at the same time avoiding the first touch.
  • the control electrode 2 and the second touch electrode 3 are broken during the flexible deformation process.
  • the touch panel of the embodiment of the present disclosure further includes a floating electrode 6 provided on the substrate 1.
  • the floating electrode 6 is provided in the same layer as the first touch electrode 2 and the second touch electrode 3, and the floating electrode 6 and the first touch electrode 2 and the second touch electrode 3 are insulated from each other.
  • the floating electrode 6 is used to reduce the load and improve the touch performance under weak ground conditions.
  • the floating electrode 6 may be located in the first touch electrode 2 and the second touch electrode 3.
  • the first touch electrode 2 and the second touch electrode 3 are routed in the peripheral area of the floating electrode 6, and the first touch electrode 2 and The second touch electrode 3 forms a first curved portion 201 and a second curved portion 301 at the floating electrode 6.
  • the floating electrode 6 may also be located in the peripheral area of the first touch electrode 2 and the second touch electrode 3.
  • the floating electrode may also be arranged in a different layer from the first touch electrode and the second touch electrode.
  • the floating electrode and the bridge structure are arranged on the same layer.
  • the capacitance of the coupling capacitor area between the first touch electrode 2 and the second touch electrode 3 changes, so that the sensing signal changes accordingly, and the touch is determined Location.
  • one of the first touch electrode 2 and the second touch electrode 3 is a Tx (driving) electrode and the other is an Rx (sensing) electrode, so that the two cooperate to complete a touch response.
  • the first touch electrode 2 may be a Tx electrode and the second touch electrode 3 may be an Rx electrode, or the second touch electrode 3 may be a Tx electrode and the first touch electrode 2 may be an Rx electrode.
  • FIG. 4 is a partially enlarged schematic diagram of the touch panel according to an embodiment of the disclosure.
  • the first touch electrode 2 and the second touch electrode 3 are both in a grid structure.
  • the touch panel of the embodiment of the present disclosure further includes a plurality of sub-pixels 5 arranged on the substrate 1, and the grid structure is arranged on the sub-pixels 5.
  • each grid corresponds to one or a group of sub-pixels 5, and the projection of the one or a group of sub-pixels 5 on the plane where the grid is located falls into the corresponding grid.
  • RBGB arrangement or pentile arrangement the shape of the grid can be changed according to sub-pixels.
  • Figure 5 is a cross-sectional view of a bridge structure provided by an embodiment of the disclosure.
  • the first touch electrode 2 and the second touch electrode 3 are located on the same side of the insulating layer 8, and the bridge structure 7 is connected to the first touch electrode 2 and the second touch electrode
  • the three points are arranged on both sides of the insulating layer 8, and the second touch electrodes 3 adjacent in the first direction are connected through the bridge structure 7.
  • the touch panel of the present disclosure further includes a light-emitting unit disposed on the substrate, and a first touch electrode and a second touch electrode are disposed on the light-emitting unit.
  • the light emitting unit includes a driving structure layer arranged on a substrate and a light emitting structure layer arranged on the driving structure layer.
  • the light emitting structure layer is used for emitting display light
  • the driving structure layer is connected with the light emitting structure layer for controlling and driving the light emitting structure layer.
  • the driving structure layer mainly includes a pixel driving circuit composed of a plurality of thin film transistors (TFT), and the light emitting structure layer mainly includes an anode, an organic light emitting layer, and a cathode.
  • Table 1 shows the laminated structure of a general mobile phone
  • Table 2 shows the simulation results of a single touch unit in the touch panel of the embodiment of the disclosure. Among them, the size of a single touch unit in Table 2 is 4200mmX4200mm.
  • the general mobile phone laminated structure shown in Table 1 is compared to simulate the touch panel of the embodiment of the present disclosure. From the simulation results shown in Table 2, it can be concluded that the touch panel of the embodiment of the present disclosure fully meets the requirements for the touch structure of the touch chip taking the general mobile phone stack structure shown in Table 1 as an example.
  • the embodiment of the present disclosure also provides a manufacturing method of the touch panel.
  • the manufacturing method of the touch panel of the embodiment of the present disclosure includes:
  • first touch electrode and the second touch electrode are insulated from each other, the first touch electrode and the second touch electrode cross each other to form a first interdigital structure, and the first touch
  • the side portion of the electrode is formed with a first curved portion extending to the outside of the first touch electrode, or the side portion of the second touch electrode is formed with a first curved portion extending to the outside of the second touch electrode. Two bends.
  • An embodiment of the present disclosure also provides a display device including the touch panel of the foregoing embodiment.
  • the display device can be any product or component with display function such as mobile phone, tablet computer, TV, monitor, notebook computer, digital photo frame, navigator, etc., and can also be a product or component with VR, AR and 3D display function.

Abstract

一种触控面板及其制备方法、显示装置。触控面板包括衬底、设置于所述衬底上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。

Description

触控面板及其制备方法、显示装置
本申请要求于2020年05月29日提交中国专利局、申请号为202010477332.4、发明名称为“触控面板及其制备方法、显示装置”的中国专利申请的优先权，其内容应理解为通过引入的方式并入本申请中。
技术领域
本公开实施例涉及但不限于触控技术领域，具体涉及触控面板及其制备方法、显示装置。
背景技术
有机发光二极管(Organic Light Emitting Diode，OLED)为主动发光显示器件，具有自发光、广视角、高对比度、低功耗、宽色域、轻薄化、可异形化等优点。随着显示技术的不断发展，OLED技术越来越多的应用于柔性显示和透明显示中。透明显示是显示技术的一个重要分支，是指在透明状态下进行图像显示，观看者不仅可以看到显示装置中的影像，而且可以看到显示装置背后的景象，可实现虚拟现实/增强现实(Virtual Reality/Augmented Reality，VR/AR)和3D显示功能。
随着柔性显示技术的发展，尤其是折叠、卷曲技术的发展，对触控面板提出了更高的要求，其中on-cell touch(将触控电极设置在显示面板的上玻璃基板之上)方案技术优势明显，具备阻容延迟(RC delay)小，不遮光，厚度薄等优势，更有利于折叠和卷曲。
发明内容
以下是对本公开详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
现有显示基板的四周设计有曲面，比如，如图1所示，在显示基板的边部形成有曲面10；或者，如图2所示，在显示基板的角部形成有曲面10。外 挂式触控屏在与具有曲面的显示基板贴合时，存在对位精度差、拉伸受损、与其他膜层开裂等风险。
为了增加外挂式触控屏的拉伸变形量，现有外挂式触控屏存在凹槽设计，以便于触控屏拉伸和贴合，同时降低拉伸时对触控屏关键器件的损伤。由于触控屏上存在横竖向凹槽，导致触控金属网格走线单一，网格连通性差，走线电阻高，存在RC延迟等问题，此外，由于存在凹槽，金属网格间距大，基础互容值低，触控时发生的触控变化量低，触控精度差。
第一方面，本公开实施例提供了一种触控面板，包括衬底、设置于所述衬底上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
在示例性实施方式中，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
在示例性实施方式中，所述第一弯曲部位于所述第一触控电极靠近所述第二触控电极一侧的侧部，所述第二弯曲部位于所述第二触控电极靠近所述第一触控电极一侧的侧部，且所述第一弯曲部与所述第二弯曲部互相交叉组成第二叉指结构。
在示例性实施方式中，还包括设置于所述衬底上沿第二方向延伸的多个间隔设置的第一连接电极，所述第一连接电极上设置有多个间隔设置的第一触控电极，所述第一触控电极通过所述第一连接电极电连通。
在示例性实施方式中，相邻所述第一连接电极之间连接有至少两个第二连接电极，所述第二连接电极位于所述第一连接电极上的第一触控电极的相对两侧，相邻所述第一连接电极与所述第二连接电极形成环状结构。
在示例性实施方式中，还包括设置于所述衬底上沿第二方向延伸的多个 间隔设置的第三连接电极，所述第三连接电极上设置有多个间隔设置的第二触控电极，所述第二触控电极通过所述第三连接电极电连通。
在示例性实施方式中，沿第一方向相邻的所述第二触控电极通过搭桥结构连通。
在示例性实施方式中，所述触控面板上设置有至少两个所述搭桥结构。
在示例性实施方式中，还包括设置于所述衬底上的凹槽，所述第一触控电极与所述第二触控电极在所述衬底上的正投影与所述凹槽在所述衬底上的正投影不重叠，所述第一触控电极和/或所述第二触控电极在所述凹槽处形成所述第一弯曲部和/或所述第二弯曲部。
在示例性实施方式中，还包括设置于所述衬底上的浮动电极，所述浮动电极与所述第一触控电极和所述第二触控电极同层设置，且所述浮动电极与所述第一触控电极和所述第二触控电极互相绝缘。
在示例性实施方式中，所述第一触控电极和所述第二触控电极均为网格结构。
在示例性实施方式中，还包括设置于所述衬底上的多个子像素，所述网格结构设置于所述子像素之上，所述网格结构中，每个网格对应一个或一组子像素，该一个或一组子像素在所述网格所在平面的投影落入对应的网格中。
第二方面，本公开实施例还提供了一种显示装置，包括前述的触控面板。
第三方面，本公开实施例还提供了一种触控面板的制备方法，包括：
在衬底上形成上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极；
其中，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
图1为显示基板的俯视图一；
图2为显示基板的俯视图二；
图3为本公开实施例触控面板的俯视图；
图4为本公开实施例触控面板的局部放大示意图；
图5为本公开实施例提供的搭桥结构的剖视图。
具体实施方式
下文中将结合附图对本公开的实施例进行详细说明。注意，实施方式可以以多个不同形式来实施。所属技术领域的普通技术人员可以很容易地理解一个事实，就是方式和内容可以在不脱离本公开的宗旨及其范围的条件下被变换为各种各样的形式。因此，本公开不应该被解释为仅限定在下面的实施方式所记载的内容中。在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互任意组合。
在本说明书中，为了方便起见，使用“中部”、“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示方位或位置关系的词句以参照附图说明构成要素的位置关系，仅是为了便于描述本说明书和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。构成要素的位置关系根据描述各构成要素的方向适当地改变。因此，不局限于在说明书中说明的词句，根据情况可以适当地更换。
在本说明书中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解。例如，可以是固定连接，或可拆卸连接，或一体地连接；可以是机械连接，或电连接；可以是直接相连，或通过中间件间接相连，或两个元件内部的连通。对于本领域的普通技术人员而言，可以根据情况理解上述术语在本公开中的含义。
本公开中的“约”，是指不严格限定界限，允许工艺和测量误差范围内的 数值。
本公开实施例触控面板的主体结构包括衬底、设置于所述衬底上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
在一些实施例中，第一触控电极的侧部形成有第一弯曲部，以及第二触控电极的侧部形成有第二弯曲部。
本公开实施例触控基板通过第一触控电极和第二触控电极形成的第一叉指结构，增加第一触控电极和第二触控电极的延伸长度，增加触控时的互容感应量，提高触控面板灵敏度。
本公开实施例的触控基板通过在第一触控电极的侧部形成第一弯曲部，和/或在第二触控电极的侧部形成第二弯曲部，从而进一步增加第一触控电极和第二触控电极的延伸长度，增加触控时的互容感应量，提高触控面板灵敏度。
图3为本公开实施例触控面板的俯视图。如图3所示，触控面板的平面结构包括衬底1，设置于衬底1上沿第一方向延伸的多个间隔设置的第一触控电极2以及沿第一方向延伸的多个间隔设置的第二触控电极3，第一触控电极2与第二触控电极3互相绝缘，第一触控电极2和第二触控电极3交叉组成第一叉指结构。且第一触控电极2与第二触控电极3沿着第二方向交替设置。第一触控电极2的侧部形成有向第一触控电极2的外侧延伸的第一弯曲部201，第二触控电极3的侧部形成有向第二触控电极3的外侧延伸的第二弯曲部301。实施例中，第一弯曲部201和第二弯曲部301沿着第二方向延伸。其中，第一方向与第二方向交叉，比如，第一方向与第二方向垂直。
在示例性实施例中，第一方向上的第一触控电极2均位于第一方向上的第二触控电极3形成的缝隙中，同样的，第一方向上的第二触控电极3均位 于第一方向上的第一触控电极2形成的缝隙中，因此组成了第一叉指结构。
如图3所示，第一弯曲部201位于第一触控电极2靠近第二触控电极3一侧的侧部，即第一弯曲部201位于第一触控电极2与第二触控电极3之间。第二弯曲部301位于第二触控电极3靠近第一触控电极2一侧的侧部，即第二弯曲部301位于第一触控电极2与第二触控电极3之间。第一弯曲部201与第二弯曲部301互相交叉组成第二叉指结构。且第一弯曲部201与第二弯曲部301沿着第一方向交替设置。本公开实施例通过使第一弯曲部201与第二弯曲部301形成第二叉指结构，从而进一步增加触控时的互容感应量，提高触控面板灵敏度。
在示例性实施例中，第一弯曲部201均位于第二弯曲部301形成的缝隙中，同样的，第二弯曲部301均位于第一弯曲部201形成的缝隙中，因此组成了第二叉指结构。
如图3所示，本公开实施例触控面板还包括设置于衬底1上沿第二方向延伸的多个间隔设置的第一连接电极202，第一连接电极202上设置有多个沿第二方向间隔排列的第一触控电极2，第一连接电极202上的第一触控电极2通过第一连接电极202电连通，从而降低第一触控电极2的电阻。实施例中，衬底1上设置有两个沿第二方向延伸的第一连接电极202，两个第一连接电极202的两侧分别形成有多个沿第二方向间隔排列的第一触控电极2。
如图3所示，相邻第一连接电极202之间连接有两个第二连接电极203，第二连接电极203将相邻的第一连接电极202电连通。两个第二连接电极203位于第一连接电极202上的第一触控电极2的相对两侧，使相邻第一连接电极202与两个第二连接电极203形成环状结构，从而降低第一触控电极2的电阻。
如图3所示，第二连接电极203的相对两侧形成有第三弯曲部204，第三弯曲部204能够增加第二连接电极203的延伸长度，降低第二连接电极203的电阻。
如图3所示，本公开实施例触控面板还包括设置于衬底1上沿第二方向延伸的多个间隔设置的第三连接电极302，第三连接电极302上设置有多个 沿第二方向间隔排列的的第二触控电极3，第三连接电极302上的第二触控电极3通过第三连接电极302电连通，从而降低第二触控电极3的电阻。
在示例性实施例中，第一连接电极202、第二连接电极203以及第三连接电极302与第一触控电极2和第二触控电极3可以同层设置，采用直接连接；第一连接电极202、第二连接电极203以及第三连接电极302与第一触控电极2和第二触控电极3可以同层设置也可以不同层设置，采用搭桥方式连接。
如图3所示，沿第一方向相邻的第二触控电极3通过搭桥结构7连通，从而降低第二触控电极3的电阻。
在示例性实施例中，触控面板设置有至少两个搭桥结构7。比如，如图1所示，本公开实施例中触控面板设置有四个搭桥结构7。
如图3所示，本公开实施例触控面板还包括设置于衬底1上的多个凹槽4，第一触控电极2与第二触控电极3在衬底1上的正投影与凹槽4在衬底1上的正投影不重叠，即第一触控电极2和第二触控电极3在凹槽4的外围区域走线。第一触控电极2和/或第二触控电极3在凹槽4处形成第一弯曲部201和/或第二弯曲部301。比如，第一触控电极2和第二触控电极3在凹槽4处形成第一弯曲部201和第二弯曲部301；或者，第一触控电极2在凹槽4处形成第一弯曲部201；或者，第二触控电极3在凹槽4处形成第二弯曲部301。凹槽4可以为沿第一方向延伸的条形槽，也可以为沿第二方向延伸的条形槽。
在示例性实施例中，凹槽4用于在触控面板发生形变时，提供形变量。其中，凹槽4可以采用多种形状，比如，矩形、菱形或不规则多边形等形状，本实施例实施例不做限制。
本公开实施例的触控基板通过设置凹槽4，从而使触控面板发生柔性变形(如，拉伸、卷曲、折叠)时，形变量集中在凹槽4，使第一触控电极2与第二触控电极3的耦合电容区域位于拉伸变形较小的非凹槽区，进而降低第一触控电极2和第二触控电极3之间的耦合电容的变化，同时避免第一触控电极2和第二触控电极3在柔性变形过程中发生断裂。
如图3所示，本公开实施例触控面板还包括设置于衬底1上的浮动电极6，浮动电极6与第一触控电极2和第二触控电极3同层设置，且浮动电极6与第一触控电极2和第二触控电极3互相绝缘。浮动电极6用于降低负载，改善弱接地情况下的触控性能。浮动电极6可以位于第一触控电极2和第二触控电极3中，第一触控电极2和第二触控电极3在浮动电极6的外围区域走线，第一触控电极2和第二触控电极3在浮动电极6处形成第一弯曲部201和第二弯曲部301。浮动电极6也可以位于第一触控电极2和第二触控电极3的外围区域。
在一些实施例中，浮动电极也可以与第一触控电极和第二触控电极不同层设置。比如，浮动电极与搭桥结构同层设置。
当本公开实施例触控面板发生触控时，第一触控电极2与第二触控电极3之间的耦合电容区域的电容发生变化，从而使得感应信号发生相应的变化，进而确定触控位置。其中，第一触控电极2和第二触控电极3，其中一个为Tx(驱动)电极，另一个为Rx(感应)电极，从而二者配合完成触控反应。实施时，既可以第一触控电极2为Tx电极，第二触控电极3为Rx电极，也可以第二触控电极3为Tx电极，第一触控电极2为Rx电极。
图4为本公开实施例触控面板的局部放大示意图。如图4所示，第一触控电极2和第二触控电极3均为网格结构。本公开实施例触控面板还包括设置于衬底1上的多个子像素5，网格结构设置于子像素5之上。网格结构中，每个网格对应一个或一组子像素5，该一个或一组子像素5在网格所在平面的投影落入对应的网格中。例如，RBGB排列或pentile排列，网格的形状可以根据子像素进行变化。
图5为本公开实施例提供的搭桥结构的剖视图。在垂直于衬底的平面，如图5所示，第一触控电极2与第二触控电极3位于绝缘层8同侧，搭桥结构7与第一触控电极2和第二触控电极3分设于绝缘层8的两侧，沿第一方向相邻的第二触控电极3通过搭桥结构7连通。
在垂直于衬底的平面，本公开触控面板还包括设置于衬底上的发光单元，发光单元之上设置有第一触控电极和第二触控电极。发光单元包括设置于衬 底上的驱动结构层以及设置于驱动结构层上的发光结构层，发光结构层用于发射显示光，驱动结构层与发光结构层连接，用于控制和驱动发光结构层。驱动结构层主要包括多个薄膜晶体管(Thin Film Transistor，TFT)组成的像素驱动电路，发光结构层主要包括阳极、有机发光层和阴极。
仿真测试：
表1为一般手机叠层结构；表2为本公开实施例触控面板中单个触控单元的仿真结果。其中，表2中的单个触控单元的尺寸为4200mmX4200mm。以表1所示一般手机叠层结构进行对比，对本公开实施例的触控面板进行仿真。由表2所示的仿真结果可以得出，本公开实施例的触控面板完全满足以表1所示一般手机叠层结构为例的触控芯片对触控结构的要求。
表1一般手机叠层结构
Figure PCTCN2021095167-appb-000001
表2本公开实施例触控面板中单个触控单元的仿真结果
Figure PCTCN2021095167-appb-000002
本公开实施例还提供了一种触控面板的制备方法。本公开实施例触控面板的制备方法包括：
在衬底上形成上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极；
其中，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
本公开实施例还提供了一种显示装置，包括前述实施例的触控面板。显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件，也可以为具有VR、AR和3D显示功能的产品或部件。
本公开中的附图只涉及本公开涉及到的结构，其他结构可参考通常设计。在不冲突的情况下，本公开的实施例即实施例中的特征可以相互组合以得到新的实施例。
本领域的普通技术人员应当理解，可以对本公开的技术方案进行修改或者等同替换，而不脱离本公开技术方案的精神和范围，均应涵盖在本公开的 权利要求的范围当中。

Claims (14)

  1. 一种触控面板，包括衬底、设置于所述衬底上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
  2. 根据权利要求1所述的触控面板，其中，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
  3. 根据权利要求2所述的触控面板，其中，所述第一弯曲部位于所述第一触控电极靠近所述第二触控电极一侧的侧部，所述第二弯曲部位于所述第二触控电极靠近所述第一触控电极一侧的侧部，且所述第一弯曲部与所述第二弯曲部互相交叉组成第二叉指结构。
  4. 根据权利要求1所述的触控面板，还包括设置于所述衬底上沿第二方向延伸的多个间隔设置的第一连接电极，所述第一连接电极上设置有多个间隔设置的第一触控电极，所述第一触控电极通过所述第一连接电极电连通。
  5. 根据权利要求4所述的触控面板，其中，相邻所述第一连接电极之间连接有至少两个第二连接电极，所述第二连接电极位于所述第一连接电极上的第一触控电极的相对两侧，相邻所述第一连接电极与所述第二连接电极形成环状结构。
  6. 根据权利要求1所述的触控面板，还包括设置于所述衬底上沿第二方向延伸的多个间隔设置的第三连接电极，所述第三连接电极上设置有多个间隔设置的第二触控电极，所述第二触控电极通过所述第三连接电极电连通。
  7. 根据权利要求1所述的触控面板，其中，沿第一方向相邻的所述第二触控电极通过搭桥结构连通。
  8. 根据权利要求7所述的触控面板，其中，所述触控面板上设置有至少 两个所述搭桥结构。
  9. 根据权利要求1所述的触控面板，还包括设置于所述衬底上的凹槽，所述第一触控电极与所述第二触控电极在所述衬底上的正投影与所述凹槽在所述衬底上的正投影不重叠，所述第一触控电极和/或所述第二触控电极在所述凹槽处形成所述第一弯曲部和/或所述第二弯曲部。
  10. 根据权利要求1所述的触控面板，还包括设置于所述衬底上的浮动电极，所述浮动电极与所述第一触控电极和所述第二触控电极同层设置，且所述浮动电极与所述第一触控电极和所述第二触控电极互相绝缘。
  11. 根据权利要求1所述的触控面板，其中，所述第一触控电极和所述第二触控电极均为网格结构。
  12. 根据权利要求11所述的触控面板，还包括设置于所述衬底上的多个子像素，所述网格结构设置于所述子像素之上，所述网格结构中，每个网格对应一个或一组子像素，该一个或一组子像素在所述网格所在平面的投影落入对应的网格中。
  13. 一种显示装置，包括权利要求1-12任一所述的触控面板。
  14. 一种触控面板的制备方法，包括：
    在衬底上形成上沿第一方向延伸的多个间隔设置的第一触控电极以及沿第一方向延伸的多个间隔设置的第二触控电极；
    其中，所述第一触控电极与所述第二触控电极互相绝缘，所述第一触控电极与所述第二触控电极互相交叉组成第一叉指结构，所述第一触控电极的侧部形成有向所述第一触控电极的外侧延伸的第一弯曲部，或者，所述第二触控电极的侧部形成有向所述第二触控电极的外侧延伸的第二弯曲部。
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