WO2020107742A1 - 触控面板及显示装置 - Google Patents

触控面板及显示装置 Download PDF

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Publication number
WO2020107742A1
WO2020107742A1 PCT/CN2019/077345 CN2019077345W WO2020107742A1 WO 2020107742 A1 WO2020107742 A1 WO 2020107742A1 CN 2019077345 W CN2019077345 W CN 2019077345W WO 2020107742 A1 WO2020107742 A1 WO 2020107742A1
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Prior art keywords
layer
sub
touch electrodes
touch
anisotropic conductive
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PCT/CN2019/077345
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English (en)
French (fr)
Inventor
冯校亮
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/344,027 priority Critical patent/US11093098B2/en
Publication of WO2020107742A1 publication Critical patent/WO2020107742A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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

Definitions

  • the present application relates to the field of display technology, in particular to a display, and in particular to a touch panel and a display device.
  • Touch panels can be divided into four types: resistive, capacitive, optical, and sonic according to different sensing technologies.
  • the current mainstream touch technology is capacitive, and resistive touch screen is the main technology before the appearance of capacitive touch screen One, its performance comparable to capacitive screens, supports the existence of resistive screens.
  • the embedded touch panel can be divided into an on cell type of the touch circuit and an in cell type of the touch circuit circuit.
  • the touch panel is becoming an indispensable part of the display panel, especially the small and medium size, and the coverage is getting wider and wider.
  • Organic Light Emitting Diode Organic Light Emitting Diode (Organic The application of Light Emitting Diode (OLED for short) technology has pushed the display to a new level, but there is a big compatibility problem with the touch screen, especially the flexible OLED screen: due to the low temperature process required by the OLED screen In the process of making a capacitive touch layer, the process difficulty is increased; especially in the embedded process, the touch panel is faced with the problems of low touch accuracy and thick display screen.
  • the touch panel of the prior art has the problems of high difficulty in manufacturing a capacitive touch layer, low touch accuracy of the touch panel and a thick display screen caused by the embedded process.
  • a touch panel includes: a substrate and a first layer of sub-touch electrodes disposed on a surface of the substrate, the first layer of sub-touch electrodes extending in a first direction;
  • An anisotropic conductive layer is provided above the first layer of sub-touch electrodes.
  • the conductive particles inside are isolated from each other and do not conduct, and the anisotropic conductive layer is subjected to Under pressure, the conductive particles gather in a conducting state;
  • a second layer of sub-touch electrodes extending in the second direction and disposed above the anisotropic conductive layer, the first direction and the second direction crossing each other;
  • An insulating layer is disposed above the second layer of touch electrodes, and a display component is also disposed above the insulating layer.
  • At least one layer of sub-touch electrodes is further disposed between the second layer of sub-touch electrodes and the insulating layer, and between two adjacent layers of sub-touch electrodes There is the anisotropic conductive layer.
  • the at least one layer of sub-touch electrodes includes a third layer of sub-touch electrodes and a fourth layer of sub-touch electrodes, and the third layer of sub-touch electrodes extends in the third direction , The third direction is different from the first direction and the second direction.
  • the extending direction of the fourth layer of sub-touch electrodes is different from the third direction.
  • the material of the substrate is glass, a polyethylene terephthalate film layer, a polyimide film layer, or a plastic chip.
  • the anisotropic conductive layer is a nano piezoelectric unit layer, and the material of the nano piezoelectric unit layer is zinc oxide.
  • the material of the sub-touch electrodes is metal, graphene, or indium tin oxide.
  • the anisotropic conductive layer further includes elastic particles. In the natural state, the conductive particles in the anisotropic conductive layer are isolated from each other and do not conduct.
  • the display component includes a thin film transistor or an organic light emitting diode.
  • the present application also provides a touch panel.
  • the touch panel includes: a substrate and a first layer of sub-touch electrodes disposed on a surface of the substrate, the first layer of sub-touch electrodes extends in a first direction ;
  • An anisotropic conductive layer is provided above the first layer of sub-touch electrodes.
  • the conductive particles inside are isolated from each other and do not conduct, and the anisotropic conductive layer is subjected to Under pressure, the conductive particles gather in a conducting state;
  • a second layer of sub-touch electrodes extending in the second direction and disposed above the anisotropic conductive layer, the first direction and the second direction crossing each other;
  • At least one layer of sub-touch electrodes is further provided between the second layer of sub-touch electrodes and the insulating layer, and the anisotropic conductive layer is provided between two adjacent layers of the sub-touch electrodes ;
  • the material of the substrate is glass, polyethylene terephthalate film layer, polyimide film layer or plastic chip.
  • the at least one layer of sub-touch electrodes includes a third layer of sub-touch electrodes and a fourth layer of sub-touch electrodes, and the third layer of sub-touch electrodes extends in the third direction , The third direction is different from the first direction and the second direction.
  • the extending direction of the fourth layer of sub-touch electrodes is different from the third direction.
  • the anisotropic conductive layer is a nano piezoelectric unit layer, and the material of the nano piezoelectric unit layer is zinc oxide.
  • the material of the sub-touch electrodes is metal, graphene, or indium tin oxide.
  • the anisotropic conductive layer further includes elastic particles. In the natural state, the conductive particles in the anisotropic conductive layer are isolated from each other and do not conduct.
  • the display component includes a thin film transistor organic light emitting diode.
  • the present application also provides a display device including a touch panel.
  • the touch panel includes: a substrate and a first layer of touch electrodes disposed on a surface of the substrate, the first layer The touch electrode extends in the first direction;
  • An anisotropic conductive layer is provided above the first layer of sub-touch electrodes.
  • the conductive particles inside are isolated from each other and do not conduct, and the anisotropic conductive layer is subjected to Under pressure, the conductive particles gather in a conducting state;
  • a second layer of sub-touch electrodes extending in the second direction and disposed above the anisotropic conductive layer, the first direction and the second direction crossing each other;
  • An insulating layer is disposed above the second layer of touch electrodes, and a display component is also disposed above the insulating layer.
  • the present application provides a touch panel and a display device.
  • the resistive screen is made inside the display panel through an in-cell process of the liquid crystal cell, which not only realizes the integrated function of touch display, but also reduces the thickness of the entire touch panel. High-precision touch control can be realized.
  • FIG. 1 is a schematic front view of a touch panel according to an embodiment of the application.
  • FIG. 2 is a schematic cross-sectional view of a touch panel in a natural state according to an embodiment of this application;
  • FIG. 3 is a schematic cross-sectional view of a touch panel in a compressed state according to an embodiment of the present application.
  • first and second are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
  • features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless otherwise specifically limited.
  • the touch panel provided by the present application includes a substrate 101 and a first layer of sub-touch electrodes 1021 disposed on the surface of the substrate 101, the first layer of sub-touch electrodes 1021 is along a first direction T1 is extended; and an anisotropic conductive layer 103 is provided above the first touch electrode 1021, the anisotropic conductive layer 103 in a natural state, the conductive particles inside are not isolated from each other, the isotropic When the anisotropic conductive layer 103 is pressed, the conductive particles gather to be in a conducting state; the second layer of sub-touch electrodes 1022 extends along the second direction T2 and is disposed above the anisotropic conductive layer 103, the first direction T1 It crosses the second direction T2.
  • the first layer of sub-touch electrodes 1021 and the second layer of sub-touch electrodes 1022 are arranged crosswise.
  • the first direction T1 is perpendicular to the second direction T2, that is, the first layer of sub-touch electrodes 1021 and the second layer of sub-touch electrodes 1022 are vertically arranged in a schematic front view .
  • the material of the touch electrode 102 is a metal material, and the metal material is copper (Cu) or aluminum (AL), graphene or indium tin oxide (ITO).
  • At least one layer of sub-touch electrodes (not shown in the figure) is also disposed above the second layer of sub-touch electrodes 1022, and the respective directions are provided between adjacent two layers of the sub-touch electrodes Anisotropic conductive layer (not shown in the figure).
  • a third touch electrode (not shown) may be provided above the second touch electrode 1022, and an anisotropic conductive layer is provided between the third touch electrode and the second touch electrode 1022 (Not shown in the figure), the third layer of sub-touch electrodes extends along a third direction T3, the third direction T3 is different from the first direction T1 and the second direction T2, and the first The one direction T1 and the second direction T2 do not coincide.
  • the third direction T3 and the first direction T1 form an angle ⁇ , and the angle ⁇ ranges from 0 degrees to 360 degrees.
  • a fourth layer of sub-touch electrodes (not shown in the figure) can be fabricated, and an anisotropic conductive layer is provided between the third layer of touch electrodes and the fourth layer of touch electrodes.
  • the fourth layer of sub-touch electrodes extends along a fourth direction T4, which is different from the third direction T3. Further, the fourth direction T4 does not coincide with the first direction T1 and the second direction T2; For example, in FIG. 1, the fourth direction T4 and the third direction T3 form an angle ⁇ , and the angle ⁇ ranges from 0 degrees to 360 degrees.
  • sub-touch electrodes can also be provided, and the at least one layer of sub-touch electrodes is formed in a staggered grid form, so that the touch panel can realize a multi-touch mode.
  • the touch panel includes a substrate and a first layer of sub-touch electrodes provided on the surface of the substrate, the first layer of sub-touch electrodes extends in a first direction; and anisotropy A conductive layer is disposed above the first touch electrode. In the natural state of the anisotropic conductive layer, the conductive particles inside are isolated from each other and do not conduct.
  • the anisotropic conductive layer When the anisotropic conductive layer is stressed, the conductive particles gather In a conductive state; the second layer of sub-touch electrodes extends in the second direction and is disposed above the anisotropic conductive layer; in this way, the resistive screen is fabricated inside the display panel through the touch circuit in the liquid crystal cell type process , Not only realizes the integrated function of touch display, but also reduces the thickness of the entire touch panel, which can realize high-precision touch.
  • the touch panel includes a substrate 201, and the material of the substrate 201 includes glass and a polyethylene terephthalate film layer (Polyethylene terephthalate (referred to as PET), polyimide film (Polyimide Film, referred to as PI) or plastic chip (Chip On Plastic, referred to as COP).
  • PET Polyethylene terephthalate
  • PI polyimide film
  • COP plastic chip
  • a touch panel includes: a substrate 201 and a first layer of sub-touch electrodes 2021 provided on the surface of the substrate 201;
  • An anisotropic conductive layer 203 is disposed above the first layer of sub-touch electrodes 2021.
  • the anisotropic conductive layer 203 is composed of irregularly arranged conductive particles 2031; further, the anisotropic conductive layer 203
  • the interior is provided with elastic particles 2032 made of foam or sponge.
  • the elastic particles 2032 make the anisotropic conductive layer 203 in a natural state, the internal conductive particles 2031 are isolated from each other and are not conductive, thereby Leave the touch panel in a circuit disconnected state.
  • the second layer of sub-touch electrodes 2022 is disposed above the anisotropic conductive layer 203.
  • first layer of sub-touch electrodes 2021 and the second layer of sub-touch electrodes 2022 are made by the same process, and the materials are metal, graphene, and indium tin oxide (ITO).
  • the anisotropic conductive layer 203 is in a natural state without pressure. In this state, the conductive particles 2031 inside the anisotropic conductive layer 203 are isolated from each other and do not conduct. At this time, the anisotropic conductive layer 203 and The touch electrode 202 is not electrically connected. At this time, the touch panel is in a circuit disconnected state.
  • anisotropic conductive layer 203 is connected to the first layer of sub-touch electrodes 2021 and the second layer of sub-touch electrodes 2022 through OCA (Optically Clear Adhesive) optical adhesive or other polymer adhesive layers.
  • OCA Optically Clear Adhesive
  • the material of the anisotropic conductive layer 203 is a nano piezoelectric unit layer, and the material of the nano piezoelectric unit layer is zinc oxide (Zinc oxide).
  • An insulating layer 204 is disposed above the second layer of sub-touch electrodes 2022, and the insulating layer 204 can be used as a flat layer (PLN) of the touch panel.
  • PPN flat layer
  • the touch panel also has a display component 205 disposed above the insulating layer 204, the display component 205 includes a thin film transistor (Thin Film Transistor, referred to as TFT) and organic light-emitting diode (Organic Light Emitting Diode (OLED for short), further, the display component 205 also includes a liquid crystal display (Liquid Crystal Display, referred to as LCD), low temperature polysilicon (Low Temperature Poly-silicon (LTPS).
  • TFT Thifilm Transistor
  • OLED Organic Light Emitting Diode
  • LCD liquid crystal display
  • LTPS Low Temperature Poly-silicon
  • multi-level touch electrodes can also be implemented by the same method: the second-layer sub-touch electrodes 2022 and At least one layer of sub-touch electrodes is disposed between the insulating layers 204, and the anisotropic conductive layer 203 is disposed between the sub-touch electrodes.
  • a third layer of sub-touch electrodes may be disposed between the second touch electrode 2022 and the insulating layer 204, and between the third layer of sub-touch electrodes and the second layer of sub-touch electrodes 2022 There is an anisotropic conductive layer 203; in the same way, a fourth layer of sub-touch electrodes can be made, and so on, a staggered grid form is formed between the at least one layer of sub-touch electrodes, so that the touch panel can realize multiple Touch mode.
  • a touch panel includes: a substrate 301 and a first layer of sub-touch electrodes 3021 provided on the surface of the substrate 301;
  • An anisotropic conductive layer 303 is provided above the first touch electrode 3021; in the natural state of the anisotropic conductive layer 303, the internal conductive particles 3031 are isolated from each other, and are not connected in an insulated state; When the control panel receives the pressure from the second touch electrode 3022, the conductive particles 3032 inside the anisotropic conductive layer gather to form a conduction effect.
  • the second layer of sub-touch electrodes 3022 is disposed above the anisotropic conductive layer 303.
  • An insulating layer 304 is disposed above the second layer of sub-touch electrodes 3022, and a display component 305 is further disposed above the insulating layer 304.
  • the first layer of sub-touch electrodes 3021, the second layer of sub-touch electrodes 3022 and the anisotropic conductive layer 303 together constitute a resistive touch layer.
  • the resistive touch layer 30 is pressed by the pressure, and the second layer of sub-touch electrodes 3022 will press the anisotropic conductive layer 303, and the elastic particles 3032 inside the anisotropic conductive layer 303 squeeze in the pressure direction
  • the conductive particles 3031 inside the anisotropic conductive layer 303 will be densely stacked and aggregated, and finally a conductive effect is formed in the vertical direction of the resistive touch layer 30, so that the first layer of sub-touch electrodes 3021 and the second
  • the layer touch electrode 3022 is turned on at the pressure position, so that the display assembly 305 is turned on.
  • an anisotropic conductive layer 303 is provided between the first layer of sub-touch electrodes 3021 and the second layer of sub-touch electrodes 3022, the effect of in-line integration of the resistive screen in the display screen is achieved, The problem of noise interference caused by the capacitive screen after using the capacitive screen is avoided; the anisotropic conductive layer 303 has a high sensitivity to pressure touch, so that the touch panel can realize high-precision touch, further, the present The touch panel and the display device provided in the embodiments of the application can be applied to operations requiring high precision such as painting.
  • the embodiments of the present application rely on the principle of resistance to realize the touch operation, so that the touch tool is no longer selective, and any method that can achieve light touch pressure can be tried to achieve the touch operation; in addition, it can be realized by the densely covered touch electrodes High-precision, high-resolution touch solution.
  • the touch electrode layer is fabricated under the display component and does not depend on the distribution of the display component location, a completely free process scheme for the touch electrode layer can be realized, so the manufacturing method is simple.
  • the present application also provides a display device, including the touch panel described in the embodiments of the present application.
  • the display device includes a touch panel, wherein the touch panel includes: a substrate and a first layer of sub-touch electrodes disposed on a surface of the substrate, the first layer of sub-touch electrodes extends in a first direction ;
  • An anisotropic conductive layer is provided above the first layer of sub-touch electrodes.
  • the conductive particles inside are isolated from each other and do not conduct, and the anisotropic conductive layer is subjected to Under pressure, the conductive particles gather in a conducting state;
  • a second layer of sub-touch electrodes extending in the second direction and disposed above the anisotropic conductive layer, the first direction and the second direction crossing each other;
  • An insulating layer is disposed above the second layer of touch electrodes, and a display component is also disposed above the insulating layer.
  • the in-line integration of the resistive screen in the display screen solves the problem of noise interference that the capacitive screen cannot avoid.
  • touch operations can be implemented in any way.
  • the touch panel and display device can be used in operations that require high precision, such as painting.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

本申请提供一种触控面板，包括衬底和第一层子触控电极，第一层子触控电极沿第一方向延伸；各向异性导电层设置于第一层子触控电极上方；第二层子触控电极沿第二方向延伸并设置于各向异性导电层上方，第一方向和第二方向相互交叉；绝缘层，设置于第二层子触控电极上方，绝缘层上方还设置有显示组件。

Description

触控面板及显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示器，具体涉及一种触控面板及显示装置。
 背景技术
随着中小尺寸显示应用的发展，人机互动的需求也越来越多，而触控应用成为人机互动中的一个重要媒介。
触控面板根据感应技术不同可分为电阻式、电容式、光学式、音波式四种，目前主流的触控技术为电容式，电阻式触控屏是电容式触控屏出现之前的主要技术之一，其可以和电容屏媲美的性能，支撑着电阻屏的存在。
根据触控电路嵌入液晶显示面板中的位置的不同可将嵌入式触控面板中分为触控电路在液晶盒上型（On Cell）和触控电路电路在液晶盒内型（In Cell）。
随着显示面板的发展，触控面板越来越成为显示面板不可缺少的一部分，尤其是中小尺寸，覆盖越来越广。有机发光二极管（Organic Light Emitting Diode，简称OLED）技术的应用将显示屏推向了新的高度，但在与触控屏搭配上，尤其是柔性OLED屏，却存在很大的兼容问题：由于OLED屏要求的低温工艺，在制作电容触控层时增加了工艺难度；尤其是内嵌式工艺制程，触控面板又面临触控精度低、显示屏较厚的问题。
 技术问题
现有技术的触控面板存在制作电容触控层的工艺难度高、内嵌式工艺制程造成的触控面板触控精度低、显示屏较厚的问题。
 技术解决方案
本申请提供的技术方案如下：
一种触控面板，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件。
在本申请提供的触控面板中，所述第二层子触控电极与所述绝缘层之间还设置有至少一层子触控电极，相邻两层所述子触控电极之间设置有所述各向异性导电层。
在本申请提供的触控面板中，所述至少一层子触控电极包括第三层子触控电极与第四层子触控电极，所述第三层子触控电极沿第三方向延伸，所述第三方向不同于所述第一方向与所述第二方向。
在本申请提供的触控面板中，所述第四层子触控电极的延伸方向不同于所述第三方向。
在本申请提供的触控面板中，所述衬底的材料为玻璃、聚对苯二甲酸乙二醇酯膜层、聚酰亚胺膜层或者塑料芯片。
在本申请提供的触控面板中，所述各向异性导电层为纳米压电单元层，所述纳米压电单元层的材料为氧化锌。
在本申请提供的触控面板中，所述子触控电极的材料为金属、石墨烯或者铟锡氧化物。
在本申请提供的触控面板中，所述各向异性导电层内部还包括弹性颗粒，所述弹性颗粒使得在自然状态下，所述各向异性导电层内部的导电颗粒互相孤立不导通。
在本申请提供的触控面板中，所述显示组件包括薄膜晶体管或有机发光二极管。
本申请还提供一种触控面板，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件；
其中，所述第二层子触控电极与所述绝缘层之间还设置有至少一层子触控电极，相邻两层所述子触控电极之间设置有所述各向异性导电层；
其中，所述衬底的材料为玻璃、聚对苯二甲酸乙二醇酯膜层、聚酰亚胺膜层或者塑料芯片。
在本申请提供的触控面板中，所述至少一层子触控电极包括第三层子触控电极与第四层子触控电极，所述第三层子触控电极沿第三方向延伸，所述第三方向不同于所述第一方向与所述第二方向。
在本申请提供的触控面板中，所述第四层子触控电极的延伸方向不同于所述第三方向。
在本申请提供的触控面板中，所述各向异性导电层为纳米压电单元层，所述纳米压电单元层的材料为氧化锌。
在本申请提供的触控面板中，所述子触控电极的材料为金属、石墨烯或者铟锡氧化物。
在本申请提供的触控面板中，所述各向异性导电层内部还包括弹性颗粒，所述弹性颗粒使得在自然状态下，所述各向异性导电层内部的导电颗粒互相孤立不导通。
在本申请提供的触控面板中，所述显示组件包括薄膜晶体管有机发光二极管。
本申请还提供一种显示装置，所述显示装置包括触控面板，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件。
 有益效果
本申请提供一种触控面板及显示装置，通过液晶盒内型工艺，将电阻屏制作于显示面板内部，既实现了触控显示一体化功能，同时又减薄了整个触控面板的厚度，可实现高精度触控。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例的触控面板的主视示意图。
图2为本申请实施例的自然状态下触控面板的剖视示意图；
图3为本申请实施例的挤压状态下触控面板的剖视示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，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申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在下列段落中参照附图以举例方式更具体地描述本发明。根据下面说明和权利要求书，本申请的优点和特征将更清楚。需说明的是，附图均采用非常简化的形式且均使用非精准的比例，仅用以方便、明晰地辅助说明本申请实施例的目的。
如图1所示，本申请提供的触控面板包括衬底101和设置于所述衬底101表面的第一层子触控电极1021，所述第一层子触控电极1021沿第一方向T1延伸；以及各向异性导电层103，设置于所述第一触控电极1021上方，所述向异性导电层103在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层103受到压力时，导电颗粒聚集呈导通状态；第二层子触控电极1022，沿第二方向T2延伸并设置于所述各向异性导电层103上方，所述第一方向T1和第二方向T2相互交叉。
在图1中，所述第一层子触控电极1021与第二层子触控电极1022呈交叉设置。譬如，在该图1中，所述第一方向T1与所述第二方向T2垂直，即该第一层子触控电极1021与第二层子触控电极1022在主视示意图上呈垂直设置。
进一步的，该触控电极102的材料为金属材料，该金属材料为铜（Cu）或者铝（AL），石墨烯或者铟锡氧化物（Indium Tin Oxide，简称ITO）。
进一步的，所述第二层子触控电极1022上方还设置有至少一层子触控电极(图中未示出)，相邻两层所述子触控电极之间设置有所述各向异性导电层（图中未示出）。
譬如，该第二触控电极1022上方可设置有第三触控电极（图中未示出），该第三触控电极与所述第二触控电极1022之间设置有各向异性导电层（图中未示出），所述第三层子触控电极沿第三方向T3延伸，所述第三方向T3不同于所述第一方向T1与所述第二方向T2，且所述第一方向T1、第二方向T2均不重合。譬如，在该图1中，所述第三方向T3与所述第一方向T1形成角度α，所述角度α的范围为0度至360度之间。
同理可制作第四层子触控电极（图中未示出），所述第三层触控电极与所述第四层触控电极之间设置有各向异性导电层。该第四层子触控电极沿第四方向T4延伸，该第四方向T4不同于该第三方向T3，进一步的，该第四方向T4与第一方向T1、第二方向T2均不重合；譬如，在该图1中，该第四方向T4与该第三方向T3形成角度β，所述角度β的范围为0度至360度之间。
以此类推，还可以设置其他层子触控电极，所述至少一层子触控电极之间形成交错网格形式，这样该触控面板就可以实现多点触控模式。
在本实施例中，所述触控面板包括衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；以及各向异性导电层，设置于所述第一触控电极上方，所述向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方；这样通过触控电路在液晶盒内型工艺，将电阻屏制作于显示面板内部，既实现了触控显示一体化功能，同时又减薄了整个触控面板的厚度，可实现高精度触控。
如图2所示，为该触控面板的剖视示意图，该触控面板包括衬底201，该衬底201的材料包括玻璃、聚对苯二甲酸乙二醇酯膜层（Polyethylene terephthalate，简称PET）、聚酰亚胺膜层（PolyimideFilm,简称PI）或者塑料芯片（Chip On Plastic，简称COP）。
一种触控面板，包括：衬底201和设置于所述衬底201表面的第一层子触控电极2021；
各向异性导电层203，设置于所述第一层子触控电极2021上方，该各向异性导电层203内部由不规则排布的导电颗粒2031组成；进一步的，该各向异性导电层203内部设置有弹性颗粒2032，该弹性颗粒2032由泡沫或者海绵制成，所述弹性颗粒2032使得所述向异性导电层203在自然状态下，所述内部的导电颗粒2031互相孤立不导通，从而使该触控面板处于电路断开状态。
第二层子触控电极2022，所述第二层子触控电极2022设置于所述各向异性导电层203上方。
进一步的，该第一层子触控电极2021与该第二层子触控电极2022由同一制程所制成，其材料为金属、石墨烯、铟锡氧化物（Indium tin oxide，简称ITO）。
在图2中，该向异性导电层203为不受压力的自然状态，此状态下，该向异性导电层203内部的导电颗粒2031互相孤立不导通，此时该各向异性导电层203与该触控电极202无电连接，此时该触控面板处于电路断开状态。
进一步的，各向异性导电层203通过OCA（Optically Clear Adhesive）光学胶或其他聚合物胶层连接第一层子触控电极2021、第二层子触控电极2022。
进一步的，该各向异性导电层203的材料为纳米压电单元层，该纳米压电单元层的材料为氧化锌（Zinc oxide）。
该第二层子触控电极2022上方设置有绝缘层204，该绝缘层204可作为该触控面板的平坦层（Planarizationlayer，简称PLN）。
该触控面板上还有设置于该绝缘层204上方的显示组件205，该显示组件205包括薄膜晶体管（Thin Film Transistor，简称TFT）和有机发光二极管（Organic Light Emitting Diode，简称OLED），进一步的，该显示组件205还包括液晶显示器（Liquid Crystal Display ，简称LCD）、低温多晶硅（Low Temperature Poly-silicon，简称LTPS）中的任意一种。
本申请实施例仅以两层子触控电极为例实现单点触控进行相关实施例的说明，亦可以通过同样的方法实现多级触控电极：所述第二层子触控电极2022与所述绝缘层204之间设置有至少一层子触控电极，所述各子触控电极之间设置有所述各向异性导电层203。
进一步的，该第二触控电极2022与该绝缘层204之间可设置有第三层子触控电极，该第三层子触控电极与所述第二层子触控电极2022之间设置有各向异性导电层203；同理可制作第四层子触控电极，以此类推，所述至少一层子触控电极之间形成交错网格形式，这样该触控面板就可以实现多点触控模式。
如图3所示，本发明实施例的触控面板受到挤压时的结构示意图。一种触控面板，包括：衬底301和设置于所述衬底301表面的第一层子触控电极3021；
各向异性导电层303，设置于所述第一触控电极3021上方；所述向异性导电层303在自然状态下，其内部的导电颗粒3031互相孤立，而不连通处于绝缘状态；当该触控面板收到来自所述第二触控电极3022上方的压力时，该各向异性导电层内部的导电颗粒3032聚集而形成导通效应。
第二层子触控电极3022，设置于所述各向异性导电层303上方。
绝缘层304，设置于所述第二层子触控电极3022上方，所述绝缘层304上方还设置有显示组件305。
该第一层子触控电极3021、第二层子触控电极3022与该各向异性导电层303共同构成电阻触控层。当有外界压力时，电阻触控层30由于受到压力的作用，第二层子触控电极3022会压迫各向异性导电层303，该各向异性导电层303内部弹性颗粒3032朝压力方向挤压，这样就促使各向异性导电层303内部的导电颗粒3031会密集堆叠并聚集，最终在该电阻触控层30的垂直方向上形成导通效果，使得第一层子触控电极3021与第二层子触控电极3022在压力位置导通，从而使所述显示组件305导通。
在本申请实施例中，由于第一层子触控电极3021与第二层子触控电极3022之间设置有各向异性导电层303，实现了电阻屏内嵌式集成于显示屏内效果，避免了使用电容屏之后带来的电容屏的杂讯干扰的问题；该各向异性导电层303对压力触控的灵敏度较高，使得该触控面板可实现高精度触控，进一步的，本申请实施例所提供的触控面板及显示装置可应用于绘画等对精度要求比较高的操作中。
本申请实施例在于依靠电阻原理实现触控操作，从而对触控工具不再有选择性，任何可以实现轻触压力的方式都可以试下实现触控操作；另外通过密布的触控电极可以实现高精度、高分辨率触控方案。
由于触控电极层制作在显示组件下方，不依赖于显示组件位置的分布，可实现触控电极层完全自由的工艺方案，因此制作方式简便。
进一步的，本申请还提供一种显示装置，包括本申请实施例所述的触控面板。
该显示装置包括触控面板，其中，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件。
本申请实施例的有益效果为：
第一，将电阻屏内嵌式化集成于显示屏内，解决了电容屏无法避开的杂讯干扰问题。
第二，不再依靠电容取得信号，可以使用任意方式实现触控操作。
第三，可实现高精度触控，该触控面板及显示装置可应用于绘画等对精度要求比较高的操作中。
第四，制程成本低，制作方便，不受显示工艺的影响。
综上所述，虽然本申请已将优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (17)

  1. 一种触控面板，其中，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
    各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
    第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
    绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件；
    其中，所述第二层子触控电极与所述绝缘层之间还设置有至少一层子触控电极，相邻两层所述子触控电极之间设置有所述各向异性导电层；
    其中，所述衬底的材料为玻璃、聚对苯二甲酸乙二醇酯膜层、聚酰亚胺膜层或者塑料芯片。
  2. 根据权利要求1所述的触控面板，其中，所述至少一层子触控电极包括第三层子触控电极与第四层子触控电极，所述第三层子触控电极沿第三方向延伸，所述第三方向不同于所述第一方向与所述第二方向。
  3. 根据权利要求2所述的触控面板，其中，所述第四层子触控电极的延伸方向不同于所述第三方向。
  4. 根据权利要求1所述的触控面板，其中，所述各向异性导电层为纳米压电单元层，所述纳米压电单元层的材料为氧化锌。
  5. 根据权利要求1所述的触控面板，其中，所述子触控电极的材料为金属、石墨烯或者铟锡氧化物。
  6. 根据权利要求1所述的触控面板，其中，所述各向异性导电层内部还包括弹性颗粒，所述弹性颗粒使得在自然状态下，所述各向异性导电层内部的导电颗粒互相孤立不导通。
  7. 根据权利要求1所述的触控面板，其中，所述显示组件包括薄膜晶体管或有机发光二极管。
  8. 一种触控面板，其中，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
    各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
    第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
    绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件。
  9. 根据权利要求8所述的触控面板，其中，所述第二层子触控电极与所述绝缘层之间还设置有至少一层子触控电极，相邻两层所述子触控电极之间设置有所述各向异性导电层。
  10. 根据权利要求9所述的触控面板，其中，所述至少一层子触控电极包括第三层子触控电极与第四层子触控电极，所述第三层子触控电极沿第三方向延伸，所述第三方向不同于所述第一方向与所述第二方向。
  11. 根据权利要求10所述的触控面板，其中，所述第四层子触控电极的延伸方向不同于所述第三方向。
  12. 根据权利要求8所述的触控面板，其中，所述衬底的材料为玻璃、聚对苯二甲酸乙二醇酯膜层、聚酰亚胺膜层或者塑料芯片。
  13. 根据权利要求8所述的触控面板，其中，所述各向异性导电层为纳米压电单元层，所述纳米压电单元层的材料为氧化锌。
  14. 根据权利要求8所述的触控面板，其中，所述子触控电极的材料为金属、石墨烯或者铟锡氧化物。
  15. 根据权利要求8所述的触控面板，其中，所述各向异性导电层内部还包括弹性颗粒，所述弹性颗粒使得在自然状态下，所述各向异性导电层内部的导电颗粒互相孤立不导通。
  16. 根据权利要求8所述的触控面板，其中，所述显示组件包括薄膜晶体管或有机发光二极管。
  17. 一种显示装置，其中，所述显示装置包括触控面板，其中，所述触控面板包括：衬底和设置于所述衬底表面的第一层子触控电极，所述第一层子触控电极沿第一方向延伸；
    各向异性导电层，设置于所述第一层子触控电极上方，所述各向异性导电层在自然状态下，其内部的导电颗粒互相孤立不导通，所述各向异性导电层受到压力时，导电颗粒聚集呈导通状态；
    第二层子触控电极，沿第二方向延伸并设置于所述各向异性导电层上方，所述第一方向和第二方向相互交叉；以及，
    绝缘层，设置于所述第二层子触控电极上方，所述绝缘层上方还设置有显示组件。
PCT/CN2019/077345 2018-11-27 2019-03-07 触控面板及显示装置 Ceased WO2020107742A1 (zh)

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