WO2023142504A1 - 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
WO2023142504A1
WO2023142504A1 PCT/CN2022/121944 CN2022121944W WO2023142504A1 WO 2023142504 A1 WO2023142504 A1 WO 2023142504A1 CN 2022121944 W CN2022121944 W CN 2022121944W WO 2023142504 A1 WO2023142504 A1 WO 2023142504A1
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WO
WIPO (PCT)
Prior art keywords
touch
fingerprint
touch panel
electrodes
layer
Prior art date
Application number
PCT/CN2022/121944
Other languages
English (en)
French (fr)
Inventor
张豪峰
郭瑞
张萌
许庆同
Original Assignee
云谷（固安）科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 KR1020237041603A priority Critical patent/KR20230170979A/ko
Publication of WO2023142504A1 publication Critical patent/WO2023142504A1/zh
Priority to US18/508,684 priority patent/US20240077967A1/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
    • G06F3/0412—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present application relates to the field of display technology, in particular to a touch panel and a display device.
  • OLED display devices have the advantages of self-illumination, high contrast, thin thickness, wide viewing angle and fast response, and are widely used in mobile devices with functions such as payment, communication, and file management. terminal.
  • a display panel with a fingerprint identification module integrated in the touch layer has been disclosed, so that at least some areas of the display panel have both touch and fingerprint identification functions.
  • the arrangement density of fingerprint electrodes far exceeds that of ordinary touch electrodes.
  • the leads corresponding to the above-mentioned fingerprint electrodes need to be connected to the corresponding control chips through the touch area, and the arrangement of leads is limited, which will also affect the fingerprint identification area. Peripheral optical uniformity.
  • the present application provides a touch panel, which has a touch area and a fingerprint recognition area, and the touch panel includes:
  • the first metal grid layer includes a plurality of touch electrodes disposed in the touch area and a plurality of fingerprint identification electrodes disposed in the fingerprint identification area;
  • the second metal grid layer includes a plurality of fingerprint leads, each of which is electrically connected to the corresponding fingerprint identification electrode;
  • the dielectric layer is provided with a contact hole, and the fingerprint lead is electrically connected to the fingerprint identification electrode corresponding to the fingerprint lead through the contact hole.
  • the above-mentioned touch panel has a touch area and a fingerprint identification area.
  • the touch panel includes a first metal mesh layer, a second metal mesh layer and a dielectric layer.
  • the first metal mesh layer includes multiple layers arranged in the touch area.
  • the second metal grid layer includes a plurality of fingerprint leads, each fingerprint lead is electrically connected to the corresponding fingerprint identification electrode
  • the medium layer is arranged on the between the first metal grid layer and the second metal grid layer
  • the dielectric layer is provided with a contact hole, and the fingerprint lead and the fingerprint identification electrode corresponding to the fingerprint lead are electrically connected through the contact hole, so that the fingerprint lead connected to the fingerprint identification electrode and the fingerprint identification electrode are electrically connected through the contact hole.
  • the touch electrodes are located in different metal grid layers, and the layout of the fingerprint leads is no longer restricted by the touch electrodes, which is beneficial to improve the optical uniformity around the fingerprint identification area.
  • the present application also provides a display device, which includes the touch panel described in any one of the above embodiments.
  • FIG. 1 is a schematic diagram of a partial structure of a touch panel with a fingerprint identification function
  • FIG. 2 is a schematic diagram of a layer structure of a touch panel in an embodiment of the present application
  • FIG. 3 is a schematic diagram of the overall structure of the first metal mesh layer and the second metal mesh layer in an embodiment of the present application;
  • FIG. 4 is a schematic structural diagram of a light-emitting layer in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • the touch panel includes a touch area and a fingerprint identification area.
  • the touch area includes a plurality of first electrodes 101 and a plurality of second electrodes 102 arranged crosswise. Specifically, the multiple first electrodes 101 are arranged in multiple rows along one direction, and the multiple second electrodes 102 are arranged in multiple columns along the other direction.
  • Capacitance is formed between the first electrodes 101 and the second electrodes 102, multiple first electrodes 101 sequentially send excitation signals, and multiple second electrodes 102 receive signals simultaneously, thereby obtaining a gap between each first electrode 101 and each second electrode 102 of capacitance.
  • the capacitance between the first electrode 101 and the second electrode 102 near the touch point will change, based on which the position of the touch operation can be determined.
  • the fingerprint identification area includes a plurality of third electrodes 103 and a plurality of fourth electrodes 104 arranged in a cross, and the plurality of third electrodes 103 and the plurality of fourth electrodes 104 are respectively arranged in multiple rows and columns, and the third The electrodes 103 and the fourth electrodes 104 are drawn out through corresponding fingerprint leads 105 .
  • the corresponding fingerprint protrusion and fingerprint depression are judged.
  • fingerprint identification needs to further identify the protrusions and depressions on the finger on the basis of identifying the finger, so the density of the electrode pattern in the fingerprint identification area is much higher than that in the touch area. Therefore, the density of the above-mentioned fingerprint wires 105 is also correspondingly greater than the density of the electrode patterns in the touch area, resulting in the layout of the fingerprint wires 105 being restricted by the surrounding first electrodes 101 and second electrodes 102, and also affecting the optical properties of the touch panel. Uniformity.
  • the present application provides a touch panel with a touch area and a fingerprint recognition area
  • the touch panel includes a first metal mesh layer, a second metal mesh layer and a dielectric layer.
  • the first metal grid layer includes a plurality of touch electrodes disposed in the touch area and a plurality of fingerprint identification electrodes disposed in the fingerprint identification area.
  • the second metal grid layer includes a plurality of fingerprint leads, and each fingerprint lead is electrically connected with a corresponding fingerprint identification electrode.
  • the medium layer is arranged between the first metal mesh layer and the second metal mesh layer.
  • the dielectric layer is provided with a contact hole, and the fingerprint lead is electrically connected with the fingerprint identification electrode corresponding to the fingerprint lead through the contact hole.
  • the touch panel provided in the embodiment of the present application may be an OLED display panel, which is applied to electronic devices such as mobile phone terminals, tablet computers, notebook computers, wearable devices, and vehicle-mounted devices.
  • An embodiment of the present application provides a touch panel, including a first metal grid layer 10 , a second metal grid layer 20 , a dielectric layer 30 and a substrate 40 .
  • the touch panel has a touch area A and a fingerprint recognition area B.
  • the first metal grid layer 10 includes a plurality of touch electrodes 11 disposed in the touch area A and a plurality of fingerprint identification electrodes 12 disposed in the fingerprint identification area B.
  • the second metal mesh layer 20 includes a plurality of fingerprint leads 21 , and each fingerprint lead 21 is electrically connected to a corresponding fingerprint identification electrode 12 .
  • the dielectric layer 30 is disposed between the first metal mesh layer 10 and the second metal mesh layer 20 . Among them, the dielectric layer 30 is provided with a contact hole 31, and the fingerprint lead 21 and the fingerprint recognition electrode 12 corresponding to the fingerprint lead 21 are electrically connected through the contact hole 31, specifically, the first metal mesh layer 10 or the second metal mesh layer. 20. During the preparation process, the corresponding conductive material is filled in the first contact hole 31 to realize the electrical connection between the fingerprint lead 21 and the corresponding fingerprint identification electrode 12.
  • the conductive material of the mesh layer 10 and the second metal mesh layer 20 realizes the electrical connection between the fingerprint lead 21 and the corresponding fingerprint identification electrode 12 .
  • the fingerprint leads connected to the fingerprint identification electrodes and the touch electrodes are located in different metal grid layers, and the layout of the fingerprint leads is no longer limited by the touch electrodes, which is beneficial to improve the optical uniformity around the fingerprint identification area.
  • the dielectric layer 30 may be a single-layer structure, or may be a multi-layer stacked structure.
  • the material of the single-layer structure is an insulating material.
  • the materials of each layer can be the same or different, and the material of at least one layer is an insulating material.
  • the touch area A is at least partially set around the fingerprint recognition area B.
  • the fingerprint identification area B is set adjacent to the edge of the touch panel, and at this time, the touch area A partially surrounds the fingerprint identification area B; or, the fingerprint identification area B is set away from the edge of the touch panel, and at this time, the touch area A surrounds the fingerprint identification area B setting.
  • the substrate 40 is located below the first metal grid layer 10 and the second metal grid layer 20 , and an array layer and a light emitting layer 50 are sequentially stacked on the substrate 40 .
  • the second metal grid layer 20 is located between the first metal grid layer 10 and the substrate 40, that is, the second metal grid layer 20 is located between the first metal grid layer Below the grid layer 10 , it is possible to prevent the second metal grid layer 20 located above the first metal grid layer 10 from shielding the capacitance, thereby affecting touch and fingerprint recognition.
  • the first metal grid layer 10 includes a plurality of first grid lines
  • each touch electrode 11 includes a plurality of first grid lines electrically connected to each other and extending in different directions.
  • each fingerprint recognition electrode 12 includes a plurality of first grid lines electrically connected to each other and extending in different directions.
  • some of the first grid lines in the first metal grid layer 10 are electrically connected to each other to form a touch electrode 11 or a fingerprint recognition electrode 12 .
  • the line width of the first grid lines can be set according to product design requirements and field process level, and the line widths of the first grid lines at different positions can be the same or different.
  • a plurality of first grids are formed in the first metal grid layer 10 , and the first grids are composed of first grid lines extending in different directions. It is easy to understand that the touch electrodes 11 are larger than the fingerprint identification electrodes 12 , and the number of first grids in each touch electrode 11 is greater than the number of first grids in the fingerprint identification electrodes 12 .
  • each touch electrode 11 includes a plurality of first grids, and each fingerprint identification electrode 12 includes at least one first grid.
  • the second metal grid layer 20 includes a plurality of second grid lines
  • each fingerprint lead 21 includes a plurality of second grid lines that are electrically connected to each other and extend in different directions, that is to say Part of the second grid lines extending in different directions in the second metal grid layer 20 are electrically connected to each other to form a fingerprint lead 21 .
  • the fingerprint leads 21 are composed of second grid lines with different orientations, and different fingerprint leads 21 may include second grids with different positions and numbers, so that the reactance of each fingerprint lead 21 is equal, which is convenient for the fingerprint identification electrode 12.
  • the arrangement design with the fingerprint leads 21 improves the fingerprint identification accuracy.
  • the second grid lines overlap with the first grid lines at corresponding positions, and the orthographic projection of each second grid line on the substrate 40 does not exceed the corresponding first grid line. Orthographic projection of the grid on the substrate 40. Therefore, the added second metal grid layer 20 will not cause additional impact on the optical uniformity of the touch panel, and ensure the overall optical uniformity of the touch panel.
  • the second grid line does not affect the touch panel
  • the light output can maximize the overall optical uniformity of the touch panel.
  • each fingerprint lead 21 includes a plurality of second grids.
  • the second grid is formed by intersections of second grid lines.
  • the first metal grid layer 10 and the second metal grid layer 20 preferably adopt the same metal grid pattern to simplify the process.
  • the orthographic projection of the second gridlines on the substrate 40 coincides with the orthographic projection of the first gridlines on the substrate 40 to ensure the overall optical uniformity of the touch panel .
  • the second grid lines may be laid on the entire touch panel, or only in the area where the fingerprint lead 21 is located.
  • the orthographic projections of the second gridlines on the substrate 40 and the orthographic projections of the first gridlines on the substrate 40 can also be alternately arranged, which is beneficial to reduce fingerprint lead
  • the parasitic capacitance between 21 and the touch electrode 11 reduces signal interference.
  • the orthographic projection of the vertices of the second grid on the substrate 40 coincides with the orthographic projection of the center of the first grid on the substrate 40, and/or, the center of the second grid is on the substrate 40
  • the orthographic projection of the vertices of the first grid coincides with the orthographic projection of the vertices of the first grid on the substrate 40, which can minimize the parasitic capacitance between the fingerprint lead 21 and the touch electrode 11.
  • the reactances of at least some fingerprint leads 21 are equal.
  • the reactances of the multiple fingerprint leads 21 are as equal as possible, so that the signals transmitted by the fingerprint leads 21 can better reflect the difference of fingerprints, which is beneficial to improve the accuracy of fingerprint identification.
  • the fingerprint leads are composed of second grid lines with different directions, and different fingerprint leads may include second grids with different positions and numbers, so that the reactance of each fingerprint lead is equal, which is convenient for the arrangement design of the fingerprint identification electrode and the fingerprint lead, Improve the accuracy of fingerprint recognition.
  • the reactance difference between two fingerprint leads 21 is within a set range, so as not to affect the accuracy of fingerprint identification.
  • the second metal grid layer 20 further includes a plurality of touch wires 22 , and each touch wire 22 is electrically connected to a corresponding touch electrode 11 .
  • the second metal grid layer 20 further includes a plurality of touch leads 22, each touch lead 22 is electrically connected to the corresponding touch electrode 11, for the touch electrode 11 adjacent to the fingerprint recognition area B
  • the touch wires 22 can effectively avoid touch wiring in the fingerprint identification area B and ensure optical uniformity; moreover, the touch wires 22 and the fingerprint wires 21 are arranged on the same layer, which is convenient for subsequent bonding.
  • the touch leads 22 include a plurality of second grid lines electrically connected to each other, for example, each touch lead 22 includes a plurality of second grid lines.
  • the touch wires 22 are connected to the touch electrodes adjacent to the fingerprint identification area B (spanning the fingerprint identification area), or lead out the predetermined touch electrodes 11 to the non-display area of the touch panel.
  • the touch wires 22 can avoid the touch wires in the first metal grid layer 10 corresponding to the fingerprint recognition area B, and improve the optical uniformity of the touch panel.
  • both the touch lead 22 and the fingerprint lead 21 are located on the second metal grid layer 20, which is convenient for subsequent bonding.
  • the light-emitting layer 50 includes a plurality of light-emitting regions 51 arranged at intervals, and shielding regions 52 located between the light-emitting regions 51 , and the first grid lines of the first metal grid layer 10 are on the light-emitting layer 50
  • the orthographic projection of the second grid line of the second metal grid layer 20 on the light-emitting layer 50 is located in the shielding area 52 .
  • a predetermined distance is reserved between the first grid line and the second grid line and the edge of the corresponding shielding area 52, which will not affect the light output generated by the light-emitting layer 50 and ensure picture display.
  • the orthographic projection of the first metal grid layer on the luminous layer and the orthographic projection of the second metal grid layer on the luminous layer are all located in the shielding area, and the light generated by the luminous layer can be emitted from the luminous area, which can avoid affecting the image. show.
  • the touch panel includes multiple fingerprint sensing electrodes 13 and multiple fingerprint driving electrodes 14 .
  • Each fingerprint sensing electrode 13 includes a plurality of fingerprint identification electrodes 12 sequentially arranged along the first direction a, and a first fingerprint connecting line 15 connected between two adjacent fingerprint identification electrodes 12 in the first direction a.
  • Each fingerprint driving electrode 14 includes a plurality of fingerprint identification electrodes 12 sequentially arranged along the second direction b, and a second fingerprint connection line 23 connected between two adjacent fingerprint identification electrodes 12 in the second direction b.
  • the first fingerprint connecting line 15 or the second fingerprint connecting line 23 is located on the second metal grid layer 20 , that is, the bridge line of the fingerprint sensing electrode 13 or the fingerprint driving electrode 14 is arranged on the second metal grid layer 20 .
  • the first fingerprint connection line or the second fingerprint connection line is located on the second metal grid layer, that is to say, the bridging line of the fingerprint identification electrode is arranged on the second metal grid layer, which can reduce the process flow, reduce the implementation cost, and facilitate touch
  • the control panel becomes thinner.
  • the first fingerprint connection line 15 is disposed on the same layer as the fingerprint recognition electrode 12
  • the second fingerprint connection line 23 is located on the second metal mesh layer 20 .
  • the touch panel still only has two metal film layers, and the second metal grid layer 20 can also be understood as being integrated with the bridging metal layer, which reduces the process flow, reduces the implementation cost, and has Conducive to the thinning of the touch panel.
  • the first direction a is perpendicular to the second direction b, which facilitates routing of the first fingerprint connection line 15 and the second fingerprint connection line 23 .
  • each fingerprint sensing electrode 13 is correspondingly connected to a fingerprint lead 21
  • each fingerprint driving electrode 14 is correspondingly connected to a fingerprint lead 21 .
  • the touch panel includes a plurality of touch sensing electrodes 16 and a plurality of touch driving electrodes 17 .
  • Each touch sensing electrode 16 includes a plurality of touch electrodes 11 sequentially arranged along the third direction c, and a first touch connection line 18 connecting two adjacent touch electrodes 11 along the third direction c.
  • Each touch driving electrode 17 includes a plurality of touch electrodes 11 sequentially arranged along the fourth direction d, and a second touch connection line 24 connecting two adjacent touch electrodes 11 in the fourth direction d.
  • the first touch connection line 18 or the second touch connection line 24 is located on the second metal grid layer 20; 24 is located on the second metal mesh layer 20 .
  • the third direction c is perpendicular to the fourth direction d, which facilitates routing of the first touch connection line 18 and the second touch connection line 24 .
  • the third direction c and the first direction a are set at an angle of 45 degrees, which facilitates the arrangement of the touch sensing electrodes 16, touch driving electrodes 17, fingerprint sensing electrodes 13, and fingerprint driving electrodes 14. .
  • the first direction is perpendicular to the second direction
  • the third direction is perpendicular to the fourth direction
  • the third direction and the first direction are set at an angle of 45 degrees to facilitate wiring.
  • each touch sensing electrode 16 is correspondingly connected to one touch lead 22
  • each touch driving electrode 17 is correspondingly connected to one touch lead 22 .
  • the second fingerprint connection line 23 and the second touch connection line 24 are also formed by the second grid lines. It is easy to understand that in other embodiments of the present application, the second fingerprint connection line and the second touch connection line can also be disposed on the bridging metal layer independent of the first metal grid layer 10 and the second metal grid layer 20
  • the touch sensing electrodes 16 and the touch driving electrodes 17, the fingerprint sensing electrodes 13 and the fingerprint driving electrodes 14 can also be arranged in layers, and it can also be understood that the touch panel includes two layers of the first metal grid layer 10.
  • the second grid line also satisfies the aforementioned design, and will not be repeated here.
  • the arrangement density of fingerprint electrodes is much higher than that of ordinary touch electrodes, and the difference in density of electrode patterns will cause differences in optical effects, which will affect the display effect of OLED display devices.
  • each touch electrode 11 includes a plurality of sub-electrodes 19 .
  • the plurality of sub-electrodes 19 are linearly connected to each other.
  • the orthographic projection of the sub-electrodes 19 along the direction perpendicular to the touch panel is a first pattern
  • the orthographic projection of the fingerprint identification electrode 12 along a direction perpendicular to the touch panel is a second pattern
  • the first pattern is consistent with the second pattern.
  • the orthographic projection along the direction perpendicular to the touch panel is the orthographic projection on the substrate 40 .
  • any fingerprint identification electrode 12 has the same electrode pattern as the sub-electrode 19, and the different color tones of the electrode blocks shown in FIG. The positions of the sensing electrodes 16 and the touch driving electrodes 17 .
  • the orthographic projection of the fingerprint recognition electrode 12 on the substrate 40 is a rhombus with side length 1, and the orthographic projection of the sub-electrode 19 on the substrate 40 is also a rhombus with side length 1.
  • the orthographic projection of the fingerprint recognition electrode 12 on the substrate 40 is a circle with a radius r
  • the orthographic projection of the sub-electrode 19 on the substrate 40 is also a circle with a radius r.
  • the shape of the fingerprint identification electrode refers to the overall outline of a single fingerprint identification electrode. Considering the actual design requirements and process errors, the shape of the fingerprint identification electrode is not strictly a geometric figure.
  • the first graphics and the second graphics include but are not limited to regular graphics such as circles, rectangles, and rhombuses, and may also be irregular graphics.
  • the patterns of the sub-electrodes 19 and the fingerprint identification electrodes 12 are the same, the optical effects are consistent, and the display effect of the OLED display device is improved.
  • the fingerprint identification electrode 12 is integrated inside the touch panel, and no additional fingerprint identification module is required, which reduces costs, simplifies the structure, and facilitates the use of the same driver chip for fingerprint identification, touch control and display.
  • the arrangement density of the sub-electrodes 19 in the touch area A is equal to the arrangement density of the fingerprint identification electrodes 12 in the fingerprint identification area B, and the center distance between two adjacent sub-electrodes 19 is equal to that of two adjacent sub-electrodes 19 .
  • the distance between the centers of the fingerprint identification electrodes 12 and the overall optical uniformity of the touch panel are relatively good.
  • Each touch electrode includes a plurality of sub-electrodes, and the orthographic projection of the sub-electrodes along the direction perpendicular to the touch panel is consistent with the pattern of the orthographic projection of the fingerprint identification electrodes along the direction perpendicular to the touch panel, so that the touch electrodes and the fingerprint identification electrodes
  • the pattern density is the same, the optical effect is consistent, and the display effect of the OLED display device is improved.
  • the aforementioned “above” and “below” are defined by the stacking direction of the touch panel, the substrate 40 is located at the bottom of the touch panel, and according to the order of stacking, the first stack is located below the last stack.
  • the embodiment of the present application also provides a display device, the display device includes a control chip and the touch panel in the above embodiment, the touch area A surrounds the fingerprint recognition area B, and the control chip It is located in the bonding area and is electrically connected with multiple fingerprint lead-out lines.
  • the display device in the embodiment of the present application may be an OLED display device, a QLED (Quantum Dot Light Emitting Diodes, quantum dot light-emitting diode) display device, electronic paper, mobile phone, tablet computer, television, monitor, notebook computer , digital photo frame, navigator, wearable device, Internet of Things device and any other product or component with a display function, the embodiments disclosed in this application are not limited thereto.
  • OLED Organic LED
  • QLED Quantum Dot Light Emitting Diodes, quantum dot light-emitting diode

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

Abstract

本申请涉及一种触控面板及显示装置。所述触控面板具有触控区和指纹识别区，所述触控面板包括：第一金属网格层，包括设于所述触控区内的多个触控电极和设于所述指纹识别区内的多个指纹识别电极；第二金属网格层，包括多条指纹引线，每一所述指纹引线与对应的所述指纹识别电极电性连接；以及介质层，设于所述第一金属网格层和所述第二金属网格层之间；其中，所述介质层设有接触孔，所述指纹引线和该指纹引线对应的所述指纹识别电极通过所述接触孔电性连接。

Description

触控面板及显示装置
相关申请
本申请要求2022年01月28日申请的，申请号为202210109224.0，名称为“触控面板及显示装置”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及显示技术领域，特别是涉及一种触控面板及显示装置。
背景技术
目前，有机发光二极管(Organic Light-Emitting Diode，简称OLED)显示装置具有自发光、对比度高、厚度薄、视角广及反应速度快等优点，广泛应用于具有支付、通讯、文件管理等功能的移动终端。为提高产品性能与用户体验，现已公开在触控层集成指纹识别模块的显示面板，使得显示面板的至少部分区域兼具触控与指纹识别功能。但，指纹电极的排布密度远远超出普通触控电极的排布密度，上述指纹电极对应设置的引线需经触控区域连接至相应的控制芯片，引线布设受限，还会影响指纹识别区域周边的光学均匀性。
发明内容
基于此，有必要针对上述技术问题，提供一种能够改善光学均匀性的触控面板及显示装置。
本申请提供一种触控面板，具有触控区和指纹识别区，所述触控面板包括：
第一金属网格层，包括设于所述触控区内的多个触控电极和设于所述指纹识别区内的多个指纹识别电极；
第二金属网格层，包括多条指纹引线，每一所述指纹引线与对应的所述指纹识别电极电性连接；以及
介质层，设于所述第一金属网格层和所述第二金属网格层之间；
其中，所述介质层设有接触孔，所述指纹引线和该指纹引线对应的所述指纹识别电极通过所述接触孔电性连接。
上述触控面板，具有触控区和指纹识别区，触控面板包括第一金属网格层、第二金属网格层和介质层，第一金属网格层包括设于触控区内的多个触控电极和设于所述指纹识别区内的多个指纹识别电极，第二金属网格层包括多个指纹引线，每一指纹引与对应的指纹 识别电极电性连接，介质层设于第一金属网格层和第二金属网格层之间，介质层设有接触孔，指纹引线和该指纹引线对应的指纹识别电极通过接触孔电性连接，这样连接指纹识别电极的指纹引线与触控电极位于不同的金属网格层中，指纹引线的布设不再受到触控电极的限制，有利于改善指纹识别区域周边的光学均匀性。
本申请还提供一种显示装置，所述显示装置包括上述任一实施例所述的触控面板。
附图说明
图1为一种具有指纹识别功能的触控面板的局部结构示意图；
图2为本申请一实施例中的触控面板的膜层结构示意图；
图3为本申请一实施例中的第一金属网格层与第二金属网格层的整体结构示意图；
图4为本申请一实施例中的发光层的结构示意图；及
图5为本申请一实施例的显示装置的结构示意图。
具体实施方式
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
如图1所示，触控面板包括触控区域和指纹识别区域。触控区域包括交叉排布的多个第一电极101和多个第二电极102。具体地，多个第一电极101沿一个方向排布成多行，多个第二电极102沿另一个方向排布成多列。
第一电极101和第二电极102之间形成电容，多个第一电极101依次发出激励信号，多个第二电极102同时接收信号，从而得到各个第一电极101和各个第二电极102之间的电容量。手指进行触摸操作时，触摸点附近的第一电极101和第二电极102之间的电容量会发生变化，据此便可判断触摸操作的位置。
类似地，指纹识别区域包括交叉排布的多个第三电极103和多个第四电极104，多个第三电极103和多个第四电极104分别排布成多行与多列，第三电极103、第四电极104通过相应的指纹引线105向外引出。
根据第三电极103和第四电极104之间的电容变化量，判断对应的指纹凸起处和指纹凹陷处。与触摸操作相比，指纹识别需要在识别出手指的基础上，进一步识别出手指上的凸起处和凹陷处，因此指纹识别区域的电极图案的密度远大于触控区域的电极图案的密度。 由此，上述指纹引线105的密度也相应大于触控区域的电极图案的密度，导致指纹引线105的布设会受到周围第一电极101、第二电极102的制约，还会影响触控面板的光学均匀性。
基于以上问题，本申请提供了一种触控面板，具有触控区和指纹识别区，该触控面板包括第一金属网格层、第二金属网格层和介质层。第一金属网格层包括设于触控区内的多个触控电极和设于指纹识别区内的多个指纹识别电极。第二金属网格层包括多条指纹引线，每一指纹引线与对应的指纹识别电极电性连接。介质层设于第一金属网格层和第二金属网格层之间。其中，介质层设有接触孔，指纹引线和该指纹引线对应的指纹识别电极通过接触孔电性连接。这样连接指纹识别电极的指纹引线与触控电极位于不同的金属网格层中，指纹引线的布设不再受到触控电极的限制，有利于改善指纹识别区域周边的光学均匀性。
本申请实施例提供的触控面板，可以为OLED显示面板，应用于手机终端、平板电脑、笔记本电脑、可穿戴设备、车载设备等电子设备。
本申请实施例提供一种触控面板，包括第一金属网格层10、第二金属网格层20、介质层30与衬底40。
再结合图3所示，触控面板具有触控区A和指纹识别区B。第一金属网格层10包括设于触控区A内的多个触控电极11和设于指纹识别区B内的多个指纹识别电极12。
第二金属网格层20包括多条指纹引线21，每一指纹引线21与对应的指纹识别电极12电性连接。介质层30设于第一金属网格层10和第二金属网格层20之间。其中，介质层30设有接触孔31，指纹引线21和该指纹引线21对应的指纹识别电极12通过接触孔31电性连接，具体可在第一金属网格层10或第二金属网格层20制备过程中对第一接触孔31内填充相应的导电材料，实现所述指纹引线21与相应指纹识别电极12的电性连接，特别地，所述接触孔31还可通过不同于第一金属网格层10及第二金属网格层20的导电材料实现指纹引线21与相应指纹识别电极12的电性连接。连接指纹识别电极的指纹引线与触控电极位于不同的金属网格层中，指纹引线的布设不再受到触控电极的限制，有利于改善指纹识别区周边的光学均匀性。
具体地，介质层30可以为单层结构，也可以为多层的层叠结构。当介质层30为单层结构时，单层结构的材料为绝缘材料。当介质层30为多层结构时，各层的材料可以相同，也可以不同，且至少一层的材料为绝缘材料。
在本申请的一些实施例中，如图3所示，触控区A至少部分围绕指纹识别区B设置。具体地，指纹识别区B邻近触控面板边缘设置，此时触控区A部分围绕指纹识别区B；或者，指纹识别区B远离触控面板边缘设置，此时触控区A环绕指纹识别区B设置。
如图2所示，衬底40位于第一金属网格层10和第二金属网格层20的下方，衬底40 上还依次层叠设置有阵列层与发光层50。
在本申请的一些实施例中，如图2所示，第二金属网格层20位于第一金属网格层10和衬底40之间，即第二金属网格层20位于第一金属网格层10下方，可以避免第二金属网格层20位于第一金属网格层10上方对电容造成屏蔽，进而影响到触控和指纹识别。
在本申请的一些实施例中，如图3所示，第一金属网格层10包括多条第一网格线，每一触控电极11包括彼此电性连接且延伸方向不同的多条第一网格线，每一指纹识别电极12包括彼此电性连接且延伸方向不同的多条第一网格线。换言之，第一金属网格层10中的部分第一网格线彼此电性连接成一个触控电极11或者指纹识别电极12。还需要说明的是，第一网格线的线宽可根据产品设计需求与现场工艺水平进行设置，不同位置的第一网格线的线宽可以相同或不同。
第一金属网格层10内形成有多个第一网格，第一网格由延伸方向不同的第一网格线构成。容易理解地，触控电极11比指纹识别电极12大，每一触控电极11中第一网格的数量大于指纹识别电极12中第一网格的数量。示例性地，每一触控电极11包括多个第一网格，每一指纹识别电极12包括至少一个第一网格。
在本申请的一些实施例中，第二金属网格层20包括多条第二网格线，每一指纹引线21包括彼此电性连接且延伸方向不同的多条第二网格线，就是说第二金属网格层20中的部分延伸方向不同的第二网格线彼此电性连接成一条指纹引线21。
在本实施例中，指纹引线21采用走向不同的第二网格线构成，不同指纹引线21可以包括不同位置、数目的第二网格，使得各指纹引线21的电抗相等，便于指纹识别电极12与指纹引线21的排布设计，提高指纹识别精度。
在本申请的一种实现方式中，第二网格线与相应位置的第一网格线重叠设置，并且每一第二网格线的衬底40上的正投影不超出对应的第一网格线在衬底40上的正投影。由此，增设的第二金属网格层20不会对触控面板的光学均匀性造成额外的影响，保证触控面板整体的光学均匀性。
在本实施例中，通过将第二网格线与相应位置的第一网格线重合设置，即将第二网格线设置不超出第一网格线，第二网格线不影响触控面板的出光，可以最大程度提高触控面板整体的光学均匀性。
示例性地，第二金属网格层20内形成有多个第二网格，每一指纹引线21包括多个第二网格。具体地，第二网格由第二网格线交叉形成。
整体来说，第一金属网格层10和第二金属网格层20优选采用同样规格样式的金属网格图案，简化工艺制程。对于第二网格线的布设区域而言，第二网格线在衬底40上的正 投影与第一网格线在衬底40上的正投影重合，确保触控面板整体的光学均匀性。
在上述实现方式中，第二网格线可以铺设于整个触控面板，也可以仅布设在指纹引线21所在的区域。
在本申请的另一种实现方式中，第二网格线在衬底40上的正投影与第一网格线在衬底40上的正投影还可以交错排布，有利于减小指纹引线21和触控电极11之间的寄生电容，降低信号干扰。
示例性地，第二网格的顶点在衬底40上的正投影与第一网格的中心在衬底40上的正投影重合，和/或，第二网格的中心在衬底40上的正投影与第一网格的顶点在衬底40上的正投影重合，可以最大程度减小指纹引线21和触控电极11之间的寄生电容。
在本申请的一些实施例中，至少部分指纹引线21的电抗相等。
在本实施例中，多条指纹引线21的电抗尽可能相等，从而指纹引线21传输信号可以更好地反映出指纹的区别，有利于提高指纹识别的准确性。
所述指纹引线采用走向不同的第二网格线构成，不同指纹引线可以包括不同位置、数目的第二网格，使得各指纹引线的电抗相等，便于指纹识别电极与指纹引线的排布设计，提高指纹识别精度。
在实际应用中，多条指纹引线21两两之间的电抗差在设定范围内，以避免影响到指纹识别的准确性。
在本申请的一些实施例中，第二金属网格层20还包括多条触控引线22，每一触控引线22与对应的触控电极11电性连接。
在本实施例中，第二金属网格层20还包括多条触控引线22，每一触控引线22与对应的触控电极11电性连接，对于邻近指纹识别区B的触控电极11来说，触控引线22能够有效避免在指纹识别区B触控布线，保证光学均匀性；再者，触控引线22与指纹引线21同层布置，方便后续邦定。
触控引线22包括彼此电性连接的多条第二网格线，示例性地，每一触控引线22包括多个第二网格。
触控引线22与邻近指纹识别区B的触控电极相连接(跨越指纹识别区)，或将既定触控电极11引出至该触控面板的非显示区。对于前者而言，触控引线22可以避免在指纹识别区B所对应的第一金属网格层10内进行触控走线，提高触控面板的光学均匀性。对于后者来说，触控引线22与指纹引线21均位于第二金属网格层20，方便后续邦定，再者，还方便将与外部电性连接的不同触控引线22的电抗设置较为一致，提高识别精度与产品性能。
除此，还需要说明的是，图3中所标识的指纹引线21、触控引线22仅为方便读者对本技术方案的理解，而非是对指纹引线21、触控引线22具体图案与走向的限定。
如图4所示，发光层50包括间隔排布的多个发光区51、以及位于发光区51之间的遮挡区52，第一金属网格层10的第一网格线在发光层50上的正投影、第二金属网格层20的第二网格线在发光层50上的正投影均位于遮挡区52内。在实际应用中，第一网格线、第二网格线与相应遮挡区52的边缘预留有既定距离，不会影响发光层50产生的光线输出，保证画面显示。
第一金属网格层在发光层上的正投影、第二金属网格层在发光层上的正投影均位于遮挡区内，发光层产生的光线可以从发光区射出，可以避免影响到画面的显示。
在本申请的一些实施例中，如图3所示，触控面板包括多个指纹感应电极13和多个指纹驱动电极14。每一指纹感应电极13包括沿第一方向a依次排布的多个指纹识别电极12、以及连接在第一方向a上相邻的两个指纹识别电极12之间的第一指纹连接线15。每一指纹驱动电极14包括沿第二方向b依次排布的多个指纹识别电极12、以及连接在第二方向b上相邻的两个指纹识别电极12之间的第二指纹连接线23。第一指纹连接线15或第二指纹连接线23位于第二金属网格层20，即将指纹感应电极13或指纹驱动电极14的桥接线设置在第二金属网格层20。
第一指纹连接线或第二指纹连接线位于第二金属网格层，就是说将指纹识别电极的桥接线设置在第二金属网格层，可以减少工艺流程，降低实现成本，并且有利于触控面板变薄。
示例性地，第一指纹连接线15与指纹识别电极12同层设置，第二指纹连接线23位于第二金属网格层20。
就互容式的指纹识别结构而言，触控面板仍只有两层金属膜层，第二金属网格层20也可理解为与桥接金属层集成设置，减少工艺流程，降低实现成本，并且有利于触控面板变薄。
示例性地，如图3所示，第一方向a与第二方向b相垂直，方便第一指纹连接线15和第二指纹连接线23走线。
在实际应用中，每一指纹感应电极13对应连接一条指纹引线21，每一指纹驱动电极14对应连接一条指纹引线21。
再参图3所示，触控面板包括多个触控感应电极16和多个触控驱动电极17。每一触控感应电极16包括沿第三方向c依次排布的多个触控电极11、以及连接在第三方向c上相邻的两个触控电极11的第一触控连接线18。每一触控驱动电极17包括沿第四方向d依 次排布的多个触控电极11、以及连接在第四方向d上相邻的两个触控电极11的第二触控连接线24。第一触控连接线18或第二触控连接线24位于第二金属网格层20；示例性地，第一触控连接线18与触控电极11同层设置，第二触控连接线24位于第二金属网格层20。同理，通过上述设计，可以减少工艺流程，降低实现成本，并且有利于触控面板变薄。
示例性地，如图3所示，第三方向c与第四方向d相垂直，方便第一触控连接线18和第二触控连接线24走线。
示例性地，如图3所示，第三方向c与第一方向a呈45度夹角设置，方便触控感应电极16、触控驱动电极17、指纹感应电极13、指纹驱动电极14的布置。
第一方向与第二方向相垂直，第三方向与第四方向相垂直，第三方向与第一方向呈45度夹角设置，方便布线。
在实际应用中，每一触控感应电极16对应连接一条触控引线22，每一触控驱动电极17对应连接一条触控引线22。
在上述实施例中，第二指纹连接线23、第二触控连接线24也均由第二网格线构成。容易理解地，在本申请的其它实施例中，第二指纹连接线、第二触控连接线亦可设置在独立于第一金属网格层10与第二金属网格层20的桥接金属层；另，还可以将前述触控感应电极16与触控驱动电极17、指纹感应电极13与指纹驱动电极14采用分层设置，也可理解为该触控面板包括两层第一金属网格层10，第二网格线同样满足前述设计，不再赘述。一般来说，指纹电极的排布密度远远超出普通触控电极的排布密度，电极图案的密度不同会造成光学效果的差异，影响OLED显示装置的显示效果。
针对上述问题，在本申请的一些实施例中，如图3所示，每一触控电极11包括多个子电极19。所述多个子电极19彼此线性连接。子电极19沿垂直于触控面板的方向的正投影为第一图形，指纹识别电极12沿垂直于触控面板的方向的正投影为第二图形，第一图形与第二图形一致。具体地，沿垂直于触控面板的方向的正投影为在衬底40上的正投影。需要说明的，任一指纹识别电极12与子电极19的电极图案一致，图3中所示出的电极图块色调不同仅为更好地体现出指纹感应电极13与指纹驱动电极14、触控感应电极16与触控驱动电极17的位置。
例如，指纹识别电极12在衬底40上的正投影是边长为l的菱形，则子电极19在衬底40上的正投影也是边长为l的菱形。又如，指纹识别电极12在衬底40上的正投影是半径为r的圆形，则子电极19在衬底40上的正投影也是半径为r的圆形。需要说明的是，指纹识别电极的形状是指单一指纹识别电极的整体轮廓图形，考虑实际设计需求与工艺误差，指纹识别电极的形状并非严格意义的几何图形。
在实际应用中，第一图形和第二图形包括但不限于是圆形、矩形、菱形等规则图形，也可以是不规则图形。
通过上述设计，子电极19与指纹识别电极12的图案是一样的，光学效果是一致的，OLED显示装置的显示效果得到改善。而且指纹识别电极12集成在触控面板内部，不需要额外设置指纹识别模组，降低成本，简化结构，有利于指纹识别、触控和显示采用同一个驱动芯片。
在本申请的一些实施例中，触控区A的子电极19的排布密度等于指纹识别区B的指纹识别电极12的排布密度，相邻两个子电极19的中心距离等于相邻两个指纹识别电极12的中心距离，触控面板整体的光学均匀性较好。
每一触控电极包括多个子电极，子电极沿垂直于触控面板的方向的正投影与指纹识别电极沿垂直于触控面板的方向的正投影的图形一致，这样触控电极与指纹识别电极的图案密度是一样的，光学效果是一致的，OLED显示装置的显示效果得到改善。
需要说明的是，前述“上方”和“下方”是以触控面板的层叠方向来定义的，衬底40位于触控面板的最下方，按照层叠的顺序，先层叠的位于后层叠的下方。
基于同一发明构思，如图5所示，本申请实施例还提供一种显示装置，该显示装置包括控制芯片和上述实施例中的触控面板，触控区A环绕指纹识别区B，控制芯片设于邦定区，并与多条指纹引出线电性连接。
可以理解的是，本申请实施例中的显示装置可以为OLED显示装置、QLED(Quantum Dot Light Emitting Diodes，量子点发光二极管)显示装置、电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、可穿戴设备、物联网设备等任何具有显示功能的产品或部件，本申请公开的实施例对此不作限制。

Claims (17)

  1. 一种触控面板，具有触控区和指纹识别区，所述触控面板包括：
    第一金属网格层，包括设于所述触控区内的多个触控电极和设于所述指纹识别区内的多个指纹识别电极；
    第二金属网格层，包括多条指纹引线，每一所述指纹引线与对应的所述指纹识别电极电性连接；以及
    介质层，设于所述第一金属网格层和所述第二金属网格层之间；
    其中，所述介质层设有接触孔，所述指纹引线和该指纹引线对应的所述指纹识别电极通过所述接触孔电性连接。
  2. 根据权利要求1所述的触控面板，其中，所述第二金属网格层包括多条第二网格线，每一所述指纹引线包括彼此电性连接且延伸方向不同的多条所述第二网格线。
  3. 根据权利要求2所述的触控面板，其中，所述第二金属网格层内形成有多个第二网格，每一所述指纹引线包括多个所述第二网格。
  4. 根据权利要求2所述的触控面板，其中，至少部分所述指纹引线的电抗相等。
  5. 根据权利要求2所述的触控面板，其中，所述第一金属网格层包括多条第一网格线；
    所述触控面板还包括设于所述第一金属网格层和所述第二金属网格层下方的衬底，所述第二网格线与相应位置的第一网格线重叠设置，并且每一所述第二网格线在所述衬底上的正投影不超出对应的所述第一网格线在所述衬底上的正投影。
  6. 根据权利要求1-5任一项所述的触控面板，其中，每一所述触控电极包括多个子电极；
    所述子电极沿垂直于所述触控面板的方向的正投影为第一图形，所述指纹识别电极沿垂直于所述触控面板的方向的正投影为第二图形，所述第一图形与所述第二图形一致。
  7. 根据权利要求6所述的触控面板，其中，所述触控区的子电极的排布密度等于所述指纹识别区的指纹识别电极的排布密度。
  8. 根据权利要求1-5任一项所述的触控面板，其中，所述第二金属网格层还包括多条触控引线，每一所述触控引线与对应的所述触控电极电性连接。
  9. 根据权利要求2-5任一项所述的触控面板，其中，所述触控面板还包括设于所述第一金属网格层和所述第二金属网格层下方的发光层，所述发光层包括间隔排布的多个发光区、以及位于所述发光区之间的遮挡区，所述第一金属网格层的所述第一网格线在所述发 光层上的正投影、所述第二金属网格层的所述第二网格线在所述发光层上的正投影均位于所述遮挡区内。
  10. 根据权利要求1-5任一项所述的触控面板，其中，所述触控面板包括多个指纹感应电极和多个指纹驱动电极；
    每一所述指纹感应电极包括沿第一方向依次排布的多个所述指纹识别电极、以及连接在所述第一方向上相邻的两个所述指纹识别电极的第一指纹连接线；
    每一所述指纹驱动电极包括沿第二方向依次排布的多个所述指纹识别电极、以及连接在所述第二方向上相邻的两个所述指纹识别电极的第二指纹连接线；
    所述第一指纹连接线或第二指纹连接线位于所述第二金属网格层。
  11. 根据权利要求10所述的触控面板，其中，所述触控面板包括多个触控感应电极和多个触控驱动电极；
    每一所述触控感应电极包括沿第三方向依次排布的多个所述触控电极、以及连接在所述第三方向上相邻的两个所述触控电极的第一触控连接线；
    每一所述触控驱动电极包括沿第四方向依次排布的多个所述触控电极、以及连接在所述第四方向上相邻的两个所述触控电极的第二触控连接线；
    所述第一触控连接线或第二触控连接线位于所述第二金属网格层。
  12. 根据权利要求11所述的触控面板，其中，所述第一方向与所述第二方向相垂直，所述第三方向与所述第四方向相垂直；
    所述第三方向与所述第一方向呈45度夹角设置。
  13. 根据权利要求5所述的触控面板，其中，所述第一金属网格层内形成有多个第一网格，所述第一网格由延伸方向不同的第一网格线构成，每一触控电极包括多个第一网格，每一指纹识别电极包括至少一个第一网格，所述触控电极中的所述第一网格的数量大于所述指纹识别电极中的所述第一网格的数量。
  14. 根据权利要求2所述的触控面板，其中，所述第一金属网格层包括多条第一网格线；
    所述触控面板还包括设于所述第一金属网格层和所述第二金属网格层下方的衬底，所述第二网格线在所述衬底上的正投影与所述第一网格线在所述衬底上的正投影交错排布。
  15. 根据权利要求14所述的触控面板，其中，所述第二网格线交叉形成的第二网格的顶点在所述衬底上的正投影与所述第一网格线交叉形成的第一网格的中心在所述衬底上的正投影重合，和/或
    所述第二网格线交叉形成的第二网格的中心在所述衬底上的正投影与所述第一网格 线交叉形成的第一网格的顶点在所述衬底上的正投影重合。
  16. 根据权利要求5或14所述的触控面板，其中，所述第二金属网格层位于所述第一金属网格层和所述衬底之间。
  17. 一种显示装置，包括权利要求1至16任一项所述的触控面板。
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