WO2019128209A1 - 一种触控面板及其驱动控制方法、触控显示装置 - Google Patents

一种触控面板及其驱动控制方法、触控显示装置 Download PDF

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Publication number
WO2019128209A1
WO2019128209A1 PCT/CN2018/096964 CN2018096964W WO2019128209A1 WO 2019128209 A1 WO2019128209 A1 WO 2019128209A1 CN 2018096964 W CN2018096964 W CN 2018096964W WO 2019128209 A1 WO2019128209 A1 WO 2019128209A1
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WIPO (PCT)
Prior art keywords
electrode
touch
film layer
touch panel
electrodes
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PCT/CN2018/096964
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English (en)
French (fr)
Inventor
安磊
Original Assignee
云谷（固安）科技有限公司
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Application filed by 云谷（固安）科技有限公司 filed Critical 云谷（固安）科技有限公司
Priority to US16/462,456 priority Critical patent/US20210109635A1/en
Publication of WO2019128209A1 publication Critical patent/WO2019128209A1/zh
Priority to US16/913,409 priority patent/US11270094B2/en

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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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing

Definitions

  • the present invention relates to the field of touch technologies, and in particular, to a touch panel, a driving control method thereof, and a touch display device.
  • touch display devices have been increasingly sought after by people, which not only saves space, is convenient to carry, but also allows users to directly operate and use their fingers or stylus. Comfortable and very convenient.
  • PDA personal digital processing
  • touch smart mobile terminals such as mobile phones
  • portable notebook computers and the like, which are commonly used in the market.
  • the touch film layer and the fingerprint recognition film layer are currently separately wired, resulting in a large number of wirings in the fingerprint recognition area and dense wiring, which easily blocks the light of the touch panel.
  • the embodiment of the present invention provides a touch panel, a driving control method thereof, and a touch display device, which are used to solve the above technical problems existing in the prior art.
  • a touch panel comprising:
  • a first electrode a second electrode, and a third electrode
  • the first electrode, the second electrode, and the third electrode are insulated from each other, and the first electrode and the second electrode are disposed to form a touch film layer, and the second electrode The intersection with the third electrode is formed as a fingerprint recognition film layer.
  • the first electrode is a touch driving electrode
  • the third electrode is a fingerprint driving electrode
  • the second electrode is a common sensing electrode of the touch film layer and the fingerprint recognition film layer, or ,
  • the first electrode is a touch sensing electrode
  • the third electrode is a fingerprint sensing electrode
  • the second electrode is a common driving electrode of the touch film layer and the fingerprint recognition film layer.
  • the fingerprint recognition film layer is correspondingly disposed on a preset target area of the touch panel, and the preset target area is a specific partial area of the touch panel or an entire area of the touch panel.
  • a line width of the second electrode corresponding to the preset target area is smaller than a first threshold, and/or a center distance of an adjacent second electrode corresponding to the preset target area is smaller than a second threshold.
  • a line width corresponding to the second electrode of the preset target area ranges from 3-5 ⁇ m, and a center spacing of adjacent second electrodes corresponding to the preset target area ranges from 8 to 12 ⁇ m.
  • the second electrode is disposed between the film layer where the first electrode is located and the film layer where the second electrode is located.
  • the method further includes: displaying a film layer, wherein the display film layer is provided with a plurality of illuminating sub-pixels arranged in an array;
  • the orthographic projection of the electrode pattern on the touch film layer in the fingerprint recognition film layer does not coincide with the orthographic projection of the illuminating sub-pixel on the touch film layer in the display film layer.
  • the second electrode corresponding to the preset target area has a hollow pattern.
  • a method for driving and controlling the touch panel comprising:
  • the first driving signals are sequentially loaded for the plurality of first electrodes, and the first sensing signals are loaded for the plurality of second electrodes;
  • the second driving signals are sequentially loaded for the plurality of third electrodes, and the second sensing signals are simultaneously loaded for the plurality of second electrodes;
  • the first driving signals are sequentially loaded for the plurality of second electrodes, and the first sensing signals are simultaneously loaded for the plurality of first electrodes;
  • the second driving signals are sequentially loaded for the plurality of second electrodes, and the second sensing signals are simultaneously loaded for the plurality of third electrodes.
  • a touch display device includes the touch panel.
  • the first electrode and the second electrode can form a touch film layer, and the second electrode can also form a fingerprint recognition film layer with the third electrode, thereby reducing the number of wires on the touch panel. As well as the degree of density, the occlusion of the illuminating sub-pixels of the display film layer is reduced.
  • the second electrode can be used to implement the touch function and the fingerprint recognition function on the touch panel, thereby improving the utilization ratio of the common electrode and simplifying the structural design.
  • FIG. 1 is a schematic structural view of a touch panel provided by the present application.
  • 2(a) and 2(b) are respectively two schematic views of the structure shared by the second electrode involved in the present application.
  • 3(a) and 3(b) are schematic structural views of a touch panel with a fingerprint recognition film layer provided by the present application;
  • FIG. 4 is a schematic cross-sectional structural view of a touch panel provided by the present application.
  • FIG. 5( a ) and FIG. 5( b ) are schematic diagrams showing pin connections in a process of switching between a touch function and a fingerprint recognition function of the touch panel provided by the present application;
  • FIG. 6( a ) and FIG. 6( b ) are schematic diagrams showing pin connections in a process of switching between a touch function and a fingerprint recognition function of the touch panel provided by the present application.
  • the touch panel mainly includes:
  • first electrodes 11 extending in a first direction (such as a lateral x direction in FIG. 1), a plurality of second electrodes 12 extending in a second direction (such as a lateral y direction in FIG. 1), and a plurality of third electrodes a third electrode 13 extending in a direction (such as a lateral x direction in FIG. 1); wherein the first electrode 11, the second electrode 12, and the third electrode 13 are insulated from each other, the first The electrode 11 and the second electrode 12 are disposed to form a touch film layer, and the second electrode 12 and the third electrode 13 are disposed to form a fingerprint recognition film layer.
  • the angle at which the first electrode 11 and the second electrode 12 intersect is not limited, and the angle of intersection between the second electrode 12 and the third electrode 13 is not limited. Then, the extending direction of the first electrode 11 and the third electrode 13 may be the same, or There is a certain angle of intersection.
  • the first electrode and the second electrode can form a touch film layer by sharing the second electrode, and the second electrode can also form a fingerprint recognition film layer with the third electrode, thereby The number and the degree of wiring on the touch panel are reduced, and the occlusion of the illuminating sub-pixels of the display film layer is reduced.
  • the second electrode can be used to implement the touch function and the fingerprint recognition function on the touch panel, thereby improving the utilization ratio of the common electrode and simplifying the structural design.
  • the second electrode is a common electrode, and in particular, at least the following structural design may exist:
  • the first electrode RX is a touch sensing electrode
  • the third electrode rx is a fingerprint sensing electrode
  • the second electrode Tx is a common driving electrode of the touch film layer and the fingerprint recognition film layer. Therefore, the structure 2 uses the second electrode as a common touch electrode to realize the touch function and the fingerprint recognition function, improve the utilization ratio of the common electrode, and simplify the structural design.
  • the first electrode TX is a touch driving electrode
  • the third electrode tx is a fingerprint driving electrode
  • the second electrode Rx is a common sensing electrode of the touch film layer and the fingerprint recognition film layer. Therefore, the structure 1 uses the second electrode as a common sensing electrode to realize the touch function and the fingerprint recognition function, improve the utilization ratio of the common electrode, and simplify the structural design.
  • the fingerprint recognition film layer is correspondingly disposed on a preset target area of the touch panel, and the preset target area is a specific partial area of the touch panel or the entire area of the touch panel.
  • the fingerprint recognition film layer may be distributed in a partial area of the touch panel, that is, a specific partial area, so that fingerprint recognition and touch can be realized based on the common electrode, or the structure can be simplified only in a partial design, or can be distributed in touch. Full-screen fingerprint recognition is achieved within the entire panel of the control panel.
  • the fingerprint recognition film layer (the film layer in which the second electrode 12 and the third electrode 13 are insulated from each other) is disposed corresponding to a specific partial region of the touch panel S (the dotted line frame region in the drawing).
  • the line width of the second electrode 12a corresponding to the preset target area (ie, the specific partial area) is smaller than the first threshold, and/or the center spacing of the adjacent second electrodes corresponding to the preset target area (ie, the specific partial area) is smaller than Second threshold.
  • the first threshold is a maximum line width that can be used for fingerprint recognition. If the line width is exceeded, the fingerprint cannot be effectively recognized.
  • the second threshold is a maximum center distance that can be used for fingerprint recognition.
  • the fingerprint cannot be effectively recognized.
  • the line width of the second electrode corresponding to the preset target area ranges from 3-5 ⁇ m
  • the center distance of the adjacent second electrode corresponding to the preset target area ranges from 8 to 12 ⁇ m.
  • the line width and the center distance of the second electrode 12b corresponding to the area other than the preset target area can be designed according to the specifications of the touch electrode, as long as the touch function can be realized.
  • the fingerprint recognition film layer is disposed correspondingly in the entire panel of the touch panel S (the dotted line frame area in the figure), so that the line widths of all the second electrodes 12 are less than the first threshold. And/or, a center spacing of adjacent second electrodes corresponding to the preset target area is less than a second threshold.
  • the second electrode may be disposed on a surface of the first electrode (ie, a surface of the first electrode away from the third electrode), or disposed on a surface of the third electrode (ie, a third electrode) Or away from the surface of the first electrode, or between the film layer where the first electrode is located and the film layer where the third electrode is located.
  • This application does not limit this, and in design, considering that the second electrode is a common electrode, it is preferable to preferably be disposed between the film layer where the first electrode is located and the film layer where the third electrode is located.
  • the touch panel further includes: a display film layer 14 in which a plurality of illuminating sub-pixels 141 arranged in an array are disposed; a fingerprint Identifying an orthographic projection of the electrode pattern M (the third electrode 13 and the second electrode 12a corresponding to the predetermined target region) on the touch film layer in the film layer, and the light-emitting sub-pixel 141 in the display film layer 14 is on the touch film
  • the orthographic projections on the layers do not coincide.
  • the illuminating sub-pixels in the display film layer are reasonably avoided, and the occlusion of the illuminating sub-pixels in the display film layer by the fingerprint recognizing film layer is avoided, and the light-emitting efficiency of the touch panel is ensured.
  • the second electrode corresponding to the preset target area has a hollow pattern.
  • the orthographic projection of the second electrode is generally designed to be located at the gap of the illuminating sub-pixel, especially for the high-PPI touch panel.
  • the pitch of the sub-pixels is small, and the gaps are relatively narrow.
  • a second electrode can be designed in two slits, and the second electrode is divided into two thin lines, in two The position of the illuminating sub-pixel is sandwiched by the slit, and the second electrode is hollowed out, so that the illuminating sub-pixel can be reasonably avoided, and sufficient capacitance value can be ensured to realize fingerprint recognition.
  • the hollow structure is not limited to the above example, and a second electrode may be disposed at a plurality of slits at positions corresponding to the illuminating sub-pixels at the adjacent slits, and the second electrode is Hollow.
  • the shape of the first electrode and the pattern of the second electrode other than the predetermined target region are not limited, and may be a rhombic electrode pattern or a strip electrode pattern.
  • the present application further provides a touch display device, comprising: the touch panel according to any of the above.
  • the touch display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a smart wearable device, a VR, an AR, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a smart wearable device, a VR, an AR, and the like.
  • Other indispensable components of the display device are understood by those skilled in the art, and are not described herein, nor should they be construed as limiting the application.
  • a method for driving and controlling the touch panel is also provided. It is considered that the second electrode can be used as a common driving electrode, and can also be used as a common sensing electrode. Then, accordingly, the following drive control methods can exist:
  • the second electrode is a shared sensing electrode:
  • the plurality of first electrodes extending in the first direction are sequentially loaded with the first driving signal, and the plurality of second electrodes extending in the second direction are simultaneously loaded with the first sensing signal;
  • the plurality of third electrodes extending in the third direction are sequentially loaded with the second driving signal, and the second sensing signals are simultaneously loaded for the plurality of second electrodes extending in the second direction.
  • each of the first electrodes extending in the first direction is sequentially scanned and driven, and the first driving signal used for the touch is loaded during scanning, and at the same time, the second electrodes extending in the second direction are loaded at the same time.
  • the plurality of first electrodes are respectively connected to different pins.
  • the first electrodes are respectively TX1-TX3, which are respectively led to the touch driving pin 1 - the touch driving pin. 3.
  • the number of the first electrodes is more than three, and the present application is only an example.
  • the second electrode Rx2 -Rx15 is equivalent to the width of the second electrode (for example, Rx1) outside the preset area.
  • the second electrode Rx2-Rx7 is connected to the same touch sensing pin 2
  • the second electrode Rx8-Rx15 is connected to the same touch.
  • the second electrode Rx1 is connected to the touch sensing pin 1 and the second electrode Rx16 is connected to the touch sensing pin 16.
  • the second electrode Rx1 is connected to the touch sensing pin 16.
  • each of the third electrodes extending in the third direction is sequentially scanned and driven, and the second driving signal used for fingerprint recognition is loaded during scanning, and at the same time, extending in the second direction and located at the same time
  • the second electrode of the target area is loaded with a second sensing signal for fingerprint recognition.
  • the first driving signal loaded by the first electrode may be left unprocessed and still maintain the scanning state.
  • switching the signal loaded by the second electrode that is, switching the pin for the touch connected to the second electrode of the preset target area to a pin for fingerprint recognition, specifically, referring to FIG.
  • the second The touch sensing pin 2 connected to the electrode Rx2-Rx7 is switched to: the second electrode Rx2-Rx7 is respectively connected to the fingerprint identification pin 1 - the fingerprint identification pin 6, and the second electrode Rx8-Rx15 is connected to the touch sensing pin 3 Switching to: the second electrodes Rx8-Rx15 are respectively connected to the fingerprint recognition pin 7-fingerprint identification pin 14.
  • the plurality of third electrodes are respectively connected to different pins, that is, the third electrodes are respectively tx1-txn, which are respectively led to the fingerprint driving pin 1 - the fingerprint driving pin n.
  • the second electrode is a common drive electrode:
  • the plurality of second electrodes extending in the second direction are sequentially loaded with the first driving signal, and the first sensing signals are simultaneously loaded for the plurality of first electrodes extending in the first direction;
  • the second driving signals are sequentially loaded by the plurality of second electrodes extending in the second direction, and the second sensing signals are simultaneously loaded for the plurality of third electrodes extending in the third direction.
  • each of the second electrodes extending in the second direction is sequentially scanned and driven, and the first driving signal used for the touch is loaded during scanning, and at the same time, the first electrodes extending in the first direction are loaded at the same time.
  • the first sensing signal used.
  • the second electrode Tx2-Tx15 corresponding to the preset area, and the adjacent second electrode of the preset number are connected to the same pin, as shown in FIG.
  • the two electrodes Tx2-Tx7 are equivalent to the width of the second electrode (for example, Tx1) outside the preset area, then the second electrodes Tx2-Tx7 are connected to the same touch driving pin 2, and the second electrodes Tx8-Tx15 are connected to The same touch driving pin 3; the second electrode corresponding to the preset area is respectively connected to different pins, that is, the second electrode Tx1 is connected to the touch driving pin 1, and the second electrode Tx16 is connected to the touch driving lead Feet 4.
  • a plurality of first electrodes RX1 - RX3 extending in the first direction are respectively led to the touch sensing pin 1 - the touch sensing pin 3.
  • the second driving electrodes extending in the second direction and located in the preset target area are sequentially scanned, and the second driving signal used for fingerprint recognition is loaded during scanning, and at the same time, the same time is
  • the third electrode extending in three directions loads the second sensing signal used for fingerprint recognition.
  • the first sensing signal loaded by the second electrode can be left unprocessed and still maintain the input state.
  • switching the signal loaded by the second electrode that is, switching the pin for the touch corresponding to the second electrode of the preset target area to the pin for fingerprint identification, specifically, referring to FIG.
  • the second The touch driving pin 2 connected to the electrode Tx2-Tx7 is switched to: the second electrode Tx2-Tx7 is respectively connected to the fingerprint driving pin 1-fingerprint driving pin 6, and the second electrode Tx8-Tx15 is connected to the touch sensing pin 3 Switching to: the second electrodes Tx7-Tx15 are respectively connected to the fingerprint driving pin 7-fingerprint driving pin 14.
  • the plurality of third electrodes are respectively connected to different pins, that is, the third electrodes are respectively rx1-rxn, which are respectively led to the fingerprint driving pin 1 - the fingerprint driving pin n.
  • the switching of the fingerprint identification circuit and the touch control circuit may be implemented by a driving IC, or may be implemented by a TFT switch, and is not limited thereto.

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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • User Interface Of Digital Computer (AREA)
  • Computer Hardware Design (AREA)
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Abstract

本申请涉及触控技术领域，尤其涉及一种触控面板及其驱动控制方法、触控显示装置，本申请主要包括：第一电极，第二电极，以及第三电极；第一电极、所述第二电极和所述第三电极三者之间相互绝缘，所述第一电极与所述第二电极交叉设置形成触控膜层，所述第二电极与所述第三电极交叉设置形成为指纹识别膜层。从而，减少了触控面板上的布线数量以及密集程度，降低对显示膜层的发光子像素的遮挡。而且，还可以在触控面板上利用第二电极分别实现触控功能和指纹识别功能，提升共用电极利用率，简化结构设计。

Description

一种触控面板及其驱动控制方法、触控显示装置
交互参考
本申请要求2017年12月29日递交的申请号为201711481123.1、名称为“一种触控面板及其驱动控制方法、触控显示装置”的中国专利的优先权，本申请参考引用了如上所述申请的全部内容。
技术领域
本申请涉及触控技术领域，尤其涉及一种触控面板及其驱动控制方法、触控显示装置。
背景技术
随着触控技术和显示技术的发展，触控显示装置已越来越多的受到人们的追捧，其不但可节省空间，方便携带，而且用户通过手指或者触控笔等就可直接操作，使用舒适，非常便捷。目前，已广泛应用各个技术领域，例如市场常见的个人数字处理(PDA)、触控类智能移动终端(比如手机)、手提式笔记型电脑等等。
以触控类智能移动终端为例，随着智能移动终端的快速发展，超高屏占比的智能移动终端凭借其能够给用户带来极致的视觉体验，越来越受到更多厂商和消费者的推崇。然而，随着智能移动终端的显示屏占比越来越大，智能移动终端的显示屏下侧留给用户用于安全认证的指纹识别模块的空间也越来越小。在这种情况下，为了给用户带来更便捷的使用体验，有些厂商则考虑直接将指纹识别模块设置在智能移动终端的触控显示区域中，以便用户能够同时在触控显示区域进行触控操作和指纹识别操作。
但是，触控膜层以及指纹识别膜层目前都是分别布线的，导致指纹识别区域的布线数目较多且布线密集，容易对触控面板的出光造成遮挡。
发明内容
本申请实施例提供一种触控面板及其驱动控制方法、触控显示装置，用以解决现有技术中存在的上述技术问题。
为了解决上述技术问题，本申请实施例采用下述技术方案：
一种触控面板，包括：
第一电极，第二电极，以及第三电极；
其中，所述第一电极、所述第二电极和所述第三电极三者之间相互绝缘，所述第一电极与所述第二电极交叉设置形成触控膜层，所述第二电极与所述第三电极交叉设置形成为指纹识别膜层。
可选地，所述第一电极为触控驱动电极，所述第三电极为指纹驱动电极，所述第二电极为所述触控膜层和所述指纹识别膜层的共用感应电极，或者，
所述第一电极为触控感应电极，所述第三电极为指纹感应电极，所述第二电极为所述触控膜层和所述指纹识别膜层的共用驱动电极。
可选地，所述指纹识别膜层对应设置于触控面板的预设目标区域，所述预设目标区域为所述触控面板的特定局部区域，或是所述触控面板的全部区域。
可选地，对应所述预设目标区域的第二电极的线宽小于第一阈值，和/或，对应所述预设目标区域的相邻第二电极的中心间距小于第二阈值。
可选地，对应所述预设目标区域的第二电极的线宽范围为3-5μm，对应所述预设目标区域的相邻第二电极的中心间距范围为8-12μm。
可选地，所述第二电极设置在所述第一电极所在膜层和所述第二电极所在膜层之间。
可选地，还包括：显示膜层，所述显示膜层中设置有呈阵列式排布的多个发光子像素；
所述指纹识别膜层中电极图案在触控膜层上的正投影，与所述显示膜层中发光子像素在触控膜层上的正投影不重合。
可选地，对应所述预设目标区域的第二电极具有镂空图案。
一种驱动控制所述触控面板的方法，其特征在于，包括：
在触控模式下，依次为多条第一电极加载第一驱动信号，同时为多条第二电极加载第一感应信号；
当切换至指纹识别模式时，依次为多条第三电极加载第二驱动信号，同时为多条第二电极同时加载第二感应信号；
或者，
在触控模式下，依次为多条第二电极加载第一驱动信号，同时为多条第一电极同时加载第一感应信号；
当切换至指纹识别模式时，依次为多条第二电极加载第二驱动信号，同时为多条第三电极同时加载第二感应信号。
一种触控显示装置，包括所述的触控面板。
本申请实施例采用的上述至少一个技术方案能够达到以下有益效果：
通过共用第二电极，使得第一电极与第二电极可以形成触控膜层，同时，该第二电极还可以与第三电极形成指纹识别膜层，从而，减少了触控面板上的布线数量以及密集程度，降低对显示膜层的发光子像素的遮挡。而且，还可以在触控面板上利用第二电极分别实现触控功能和指纹识别功能，提升共用电极利用率，简化结构设计。
附图说明
在附图中：
图1为本申请提供的触控面板的结构示意图；
图2(a)和图2(b)分别为本申请中所涉及的第二电极共用的两种结构示意图；
图3(a)和图3(b)分别为本申请提供的分布有指纹识别膜层的触控面板的结构示意图；
图4为本申请提供的触控面板的剖面结构示意图；
图5(a)和图5(b)为本申请提供的触控面板的触控功能与指纹识别功能进行切换过程中的引脚连接关系示意图；
图6(a)和图6(b)为本申请提供的触控面板的触控功能与指纹识别功能进行切换过程中的引脚连接关系示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。
以下结合附图，详细说明本申请各实施例提供的技术方案。
参照图1所示，为本申请提供的触控面板的结构示意图，该触控面板主要包括：
多条沿第一方向(如图1中横向x方向)延伸的第一电极11，多条沿第二方向(如图1中横向y方向)延伸的第二电极12，以及多条沿第三方向(如图1中横向x方向)延伸的第三电极13；其中，所述第一电极11、所述第二电极12和所述第三电极13三者之间相互绝缘，所述第一电极11与所述第二电极12交叉设置形成为触控膜层，所述第二电极12与所述第三电极13交叉设置形成为指纹识别膜层。
其中，第一电极11与第二电极12交叉的角度不限，第二电极12与第三电极13交叉角度不限，那么，第一电极11与第三电极13的延伸方向可以相同，也可以存在一定交叉角度。
由此，在本申请方案中，通过共用第二电极，使得第一电极与第二电极可以形成触控膜层，同时，该第二电极还可以与第三电极形成指纹识别膜层，从而，减少了触控面板上的布线数量以及密集程度，降低对显示膜层的发光子像素的遮挡。而且，还可以在触控面板上利用第二电极分别实现触控功能和指纹识别功能，提升共用电极利用率，简化结构设计。
在本申请中，第二电极为共用电极，具体地，至少可以存在以下结构设计：
结构1：
参照图2(a)所示，第一电极RX为触控感应电极，第三电极rx为指纹感应电极，第二电极Tx为所述触控膜层和所述指纹识别膜层的共用驱动电极。由此，该结构2以第二电极作为共用触控电极，实现触控功能和指纹识别功能，提升共用电极利用率，简化结构设计。
结构2：
参照图2(b)所示，第一电极TX为触控驱动电极，第三电极tx为指纹驱动电极，第二电极Rx为所述触控膜层和所述指纹识别膜层的共用感应电极。由此，该结构1以第二电极作为共用感应电极，实现触控功能和指纹识别功能，提升共用电极利用率，简化结构设计。
需要说明的是，在本申请中，指纹识别膜层对应设置于触控面板的预设目标区域，该预设目标区域为触控面板的特定局部区域，或是触控面板的全部区域。换言之，指纹识别膜层可以分布在触控面板的部分区域，即特定局部区域，这样，既可以基于共用电极实现指纹识别和触控，也可以仅在局部设计，简化结构；也可以分布在触控面板的整个面板内，从而实现全屏指纹识别。
具体参照图3(a)所示，指纹识别膜层(第二电极12与第三电极13绝缘交叉而成的膜层)对应设置于触控面板S的特定局部区域(图中虚线框区域)，对应预设目标区域(即特定局部区域)的第二电极12a的线宽小于第一阈值，和/或，对应预设目标区域(即特定局部区域)的相邻第二电极的中心间距小于第二阈值。其中，第一阈值为可以实现指纹识别的最大线宽，超过该线宽就无法有效识别指纹；第二阈值为可以实现指纹识别的最大中心间距，超过该中心间距也无法有效识别指纹。针对预设目标区域的第二电极12，只要满足这两个条件中的一个即可，也可以同时满足两个条件。例如，对应所 述预设目标区域的第二电极的线宽范围为3-5μm，对应所述预设目标区域的相邻第二电极的中心间距范围为8-12μm。而对应预设目标区域以外区域的第二电极12b，其线宽以及电极中心间距均可以按照触控电极的规格进行设计，只要能够实现触控功能即可。
另外，参照图3(b)所示，指纹识别膜层对应设置于触控面板S的整个面板内(图中虚线框区域)，从而，所有第二电极12的线宽均小于第一阈值，和/或，对应预设目标区域的相邻第二电极的中心间距小于第二阈值。
可选地，在本申请中，所述第二电极可以设置在第一电极的表面(即第一电极远离第三电极的表面)，或是，设置在第三电极的表面(即第三电极的远离第一电极的表面)，或是，设置在所述第一电极所在膜层和所述第三电极所在膜层之间。本申请并不对此进行限定，而在设计时，考虑到第二电极为共用电极，因此，优选以设置在第一电极所在膜层和所述第三电极所在膜层之间为较佳选择。
可选地，在本申请中，参照图4所示，该触控面板还包括：显示膜层14，所述显示膜层14中设置有呈阵列式排布的多个发光子像素141；指纹识别膜层中电极图案M(第三电极13以及对应预设目标区域的第二电极12a)在触控膜层上的正投影，与所述显示膜层14中发光子像素141在触控膜层上的正投影不重合。从而，合理避让显示膜层中的发光子像素，避免指纹识别膜层对显示膜层中发光子像素的遮挡，保证触控面板的出光效率。
可选地，在本申请中，还可以存在指纹识别膜层中电极图案在触控膜层上的正投影，与所述显示膜层中发光子像素在触控膜层上的正投影部分重合的情况。
可选地，在本申请中，对应所述预设目标区域的第二电极具有镂空图案。具体实现时，考虑到第二电极需要合理避让显示膜层的发光子像素，因此，第二电极的正投影一般设计位于发光子像素的缝隙处，尤其针对高PPI的触控面板而言，发光子像素的间距较小，缝隙相应比较窄，为了保证指纹识别 膜层的容值足够，可以分别在两个缝隙处设计一条第二电极，而该第二电极分设为两条细线，在两个缝隙处所夹发光子像素对应的位置，该第二电极呈镂空状，从而，既可以合理避让发光子像素，又可以保证足够的容值，实现指纹识别。可选地，在本申请中，该镂空结构并不限定为如上举例，还可以为一条第二电极分设在多个缝隙处，在相邻缝隙处的发光子像素对应的位置，第二电极呈镂空状。
另外，需要说明的是，在本申请中，第一电极的形状以及预设目标区域以外的第二电极的图案不限，可以为菱形电极图案也可以为条状电极图案。
同时，本申请还提供了一种触控显示装置，包括：如上述任一项所述的触控面板。此外，该触控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、智能穿戴设备、VR、AR等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本申请的限制。
可选地，在本申请中，还提供了一种驱动控制上述触控面板的方法。考虑到第二电极可以作为共用驱动电极使用，也可以作为共用感应电极使用。那么，相应地，可以存在以下驱动控制方法：
--第二电极为共用感应电极：
在触控模式下，依次为沿第一方向延伸的多条第一电极加载第一驱动信号，为沿第二方向延伸的多条第二电极同时加载第一感应信号；
当切换至指纹识别模式时，依次为沿第三方向延伸的多条第三电极加载第二驱动信号，为沿第二方向延伸的多条第二电极同时加载第二感应信号。
具体地，依次扫描驱动沿第一方向延伸的各个第一电极，扫描时加载的为触控所用的第一驱动信号，同时，在同一时间为沿第二方向延伸的各个第二电极加载触控所用的第一感应信号。其中，多个第一电极分别连接至不同的引脚，例如，参照图5(a)所示，第一电极分别为TX1-TX3，分别引至触 控驱动引脚1-触控驱动引脚3，可选地，第一电极的个数不止3个，本申请只是示例。多个第二电极Rx1-Rxn，对应预设区域的第二电极Rx2-Rx15，相邻预设个数的第二电极连接至同一个引脚，如图5(a)中，第二电极Rx2-Rx15相当于预设区域以外的第二电极(例如Rx1)所占宽度，那么，第二电极Rx2-Rx7连接至同一个触控感应引脚2，第二电极Rx8-Rx15连接至同一个触控感应引脚3；对应预设区域以外的第二电极分别连接至不同的引脚，即第二电极Rx1连接至触控感应引脚1，第二电极Rx16连接至触控感应引脚16。
当切换至指纹识别模式时，依次扫描驱动沿第三方向延伸的各个第三电极，扫描时加载的为指纹识别所用的第二驱动信号，同时，在同一时间为沿第二方向延伸且位于预设目标区域的第二电极加载指纹识别所用的第二感应信号。此时，第一电极加载的第一驱动信号可以不作处理，仍保持扫描状态。而将第二电极加载的信号进行切换，即将对应预设目标区域的第二电极连接的触控所用引脚切换为指纹识别所用引脚，具体地，参照图5(b)所示，第二电极Rx2-Rx7连接的触控感应引脚2切换为：第二电极Rx2-Rx7分别连接至指纹识别引脚1-指纹识别引脚6，第二电极Rx8-Rx15连接的触控感应引脚3切换为：第二电极Rx8-Rx15分别连接至指纹识别引脚7-指纹识别引脚14。多个第三电极分别连接至不同的引脚，即第三电极分别为tx1-txn，分别引至指纹驱动引脚1-指纹驱动引脚n。
--第二电极为共用驱动电极：
在触控模式下，依次为沿第二方向延伸的多条第二电极加载第一驱动信号，为沿第一方向延伸的多条第一电极同时加载第一感应信号；
当切换至指纹识别模式时，依次为沿第二方向延伸的多条第二电极加载第二驱动信号，为沿第三方向延伸的多条第三电极同时加载第二感应信号。
具体地，依次扫描驱动沿第二方向延伸的各个第二电极，扫描时加载的为触控所用的第一驱动信号，同时，在同一时间为沿第一方向延伸的各个第一电极加载触控所用的第一感应信号。其中，多个第二电极Tx1-Txn中，对 应预设区域的第二电极Tx2-Tx15，相邻预设个数的第二电极连接至同一个引脚，如图6(a)中，第二电极Tx2-Tx7相当于预设区域以外的第二电极(例如Tx1)所占宽度，那么，第二电极Tx2-Tx7连接至同一个触控驱动引脚2，第二电极Tx8-Tx15连接至同一个触控驱动引脚3；对应预设区域以外的第二电极分别连接至不同的引脚，即第二电极Tx1连接至触控驱动引脚1，第二电极Tx16连接至触控驱动引脚4。多个沿第一方向延伸的第一电极RX1-RX3分别引至触控感应引脚1-触控感应引脚3。
当切换至指纹识别模式时，依次扫描驱动沿第二方向延伸且位于预设目标区域的各个第二电极，扫描时加载的为指纹识别所用的第二驱动信号，同时，在同一时间为沿第三方向延伸的第三电极加载指纹识别所用的第二感应信号。此时，第二电极加载的第一感应信号可以不作处理，仍保持输入状态。而将第二电极加载的信号进行切换，即将对应预设目标区域的第二电极连接的触控所用引脚切换为指纹识别所用引脚，具体地，参照图6(b)所示，第二电极Tx2-Tx7连接的触控驱动引脚2切换为：第二电极Tx2-Tx7分别连接至指纹驱动引脚1-指纹驱动引脚6，第二电极Tx8-Tx15连接的触控感应引脚3切换为：第二电极Tx7-Tx15分别连接至指纹驱动引脚7-指纹驱动引脚14。多个第三电极分别连接至不同的引脚，即第三电极分别为rx1-rxn，分别引至指纹驱动引脚1-指纹驱动引脚n。
需要说明的是，在本申请中，上述指纹识别电路以及触控电路的开关切换可以通过驱动IC实现，也可以通过TFT开关实现，并不对此进行限定。

Claims (10)

  1. 一种触控面板，其中，包括：
    第一电极、第二电极，以及第三电极；
    其中，所述第一电极、所述第二电极和所述第三电极三者之间相互绝缘，所述第一电极与所述第二电极交叉设置形成触控膜层，所述第二电极与所述第三电极交叉设置形成为指纹识别膜层。
  2. 如权利要求1所述的触控面板，其中，所述第一电极为触控驱动电极，所述第三电极为指纹驱动电极，所述第二电极为所述触控膜层和所述指纹识别膜层的共用感应电极，或者，
    所述第一电极为触控感应电极，所述第三电极为指纹感应电极，所述第二电极为所述触控膜层和所述指纹识别膜层的共用驱动电极。
  3. 如权利要求1或2所述的触控面板，其中，所述指纹识别膜层对应设置于触控面板的预设目标区域，所述预设目标区域为所述触控面板的局部区域，或是所述触控面板的全部区域。
  4. 如权利要求3所述的触控面板，其中，对应所述预设目标区域的第二电极的线宽小于第一阈值，对应所述预设目标区域的相邻第二电极的中心间距小于第二阈值。
  5. 如权利要求4所述的触控面板，其中，对应所述预设目标区域的第二电极的线宽范围为3-5μm，对应所述预设目标区域的相邻第二电极的中心间距范围为8-12μm。
  6. 如权利要求3所述的触控面板，其中，对应所述预设目标区域的第二电极具有镂空图案。
  7. 如权利要求1所述的触控面板，其中，所述第二电极设置在所述第一电极所在膜层和所述第二电极所在膜层之间。
  8. 如权利要求1至7任一项所述的触控面板，其中，还包括：显示膜层， 所述显示膜层中设置有呈阵列式排布的多个发光子像素；
    所述指纹识别膜层中电极图案在触控膜层上的正投影，与所述显示膜层中发光子像素在触控膜层上的正投影不重合。
  9. 一种驱动控制权利要求1-8任一项所述触控面板的方法，其中，包括：
    在触控模式下，依次为多条第一电极加载第一驱动信号，同时为多条第二电极加载第一感应信号；
    当切换至指纹识别模式时，依次为多条第三电极加载第二驱动信号，同时为多条第二电极加载第二感应信号；
    或者，
    在触控模式下，依次为多条第二电极加载第一驱动信号，同时为多条第一电极加载第一感应信号；
    当切换至指纹识别模式时，依次为多条第二电极加载第二驱动信号，同时为多条第三电极加载第二感应信号。
  10. 一种触控显示装置，其中，包括权利要求1-8任一项所述的触控面板。
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