WO2022205212A1 - 触控基板及显示装置 - Google Patents

触控基板及显示装置 Download PDF

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Publication number
WO2022205212A1
WO2022205212A1 PCT/CN2021/084732 CN2021084732W WO2022205212A1 WO 2022205212 A1 WO2022205212 A1 WO 2022205212A1 CN 2021084732 W CN2021084732 W CN 2021084732W WO 2022205212 A1 WO2022205212 A1 WO 2022205212A1
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WO
WIPO (PCT)
Prior art keywords
touch
touch signal
signal line
substrate
area
Prior art date
Application number
PCT/CN2021/084732
Other languages
English (en)
French (fr)
Inventor
王玉
樊聪
仝可蒙
何帆
崔国意
董向丹
邓江涛
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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
Priority to US17/755,108 priority Critical patent/US20240134488A1/en
Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to DE112021001307.6T priority patent/DE112021001307T5/de
Priority to PCT/CN2021/084732 priority patent/WO2022205212A1/zh
Priority to CN202180000665.0A priority patent/CN115735185A/zh
Publication of WO2022205212A1 publication Critical patent/WO2022205212A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—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 disclosure relates to the field of touch technology, and in particular, to a touch substrate and a display device.
  • FMLOC Flexible Multi Layer On Cell
  • the touch signal lines are respectively connected to the touch electrodes in the display area from the edge of the display substrate to transmit and receive signals, and touch the touch electrodes in the display area through the change of the capacitance generated by the fingers touching the touch electrodes in the display area. control function.
  • the trace wire of the folded product is set with double-layer metal wires, and an inorganic layer is arranged between the two layers of metal wires, but when the folded product is bent at a large angle, the inorganic layer is prone to breakage at the end of the trace wire. This leads to peeling of the film layer (Peeling) and the breakage of the Trace line, which affects the service life of the product.
  • a substrate including: a touch area and a peripheral area outside the touch area;
  • the first metal layer located on one side of the substrate, includes: a plurality of first touch signal lines; the first touch signal lines are located in the peripheral area;
  • a first insulating layer located on the side of the first metal layer away from the substrate;
  • the second metal layer located on the side of the insulating layer away from the first metal layer, includes: a plurality of second touch signal lines electrically connected to the first touch signal lines in a one-to-one correspondence; the second touch signal lines are located in the peripheral area;
  • the orthographic projection of the edge of the first end of the first touch signal line in its extending direction on the substrate, and the orthographic projection of the edge of the first end of the second touch signal line electrically connected to it in its extending direction on the substrate do not overlap, and the orthographic projection of the edge of the first end of the first touch signal line in the extending direction on the substrate at least partially overlaps with the orthographic projection of the second touch signal line on the substrate; wherein the first touch signal line The first end of the first touch signal line is the end of the first touch signal line that is close to the touch area in its extension direction, and the first end of the second touch signal line is the end of the second touch signal line that is close to the touch area in its extension direction. end.
  • the first end of each first touch signal line includes a first inclined surface
  • the first insulating layer includes a second inclined surface in an area covering the first inclined surface, and the first insulating layer further has: connected with the second inclined surface in the extending direction of the first touch signal line, and respectively located on the second inclined surface a first plane and a second plane on both sides; the orthographic projection of the second plane on the substrate does not overlap with the orthographic projection of the first touch signal line on the substrate;
  • the edge of the first end of the second touch signal line in the extending direction thereof extends at least to the junction of the second inclined surface and the second plane.
  • the edge of the first end of the second touch signal line in the extending direction thereof extends to the second plane.
  • the line width of the first touch signal line is equal to the line width of the second touch signal line in the extending direction perpendicular to the first touch signal line.
  • it also includes touch electrodes, which are disposed in the touch area, within a range of 50 microns near the connection positions of the first touch signal lines and the second touch signal lines and the corresponding electrically connected touch electrodes.
  • a touch signal line and a second touch signal line are electrically connected through a first via hole penetrating the first insulating layer.
  • the second metal layer and/or the first metal layer further includes:
  • the first part of the second touch signal line is connected with a connecting lead, and the first part of the second touch signal line is connected with the second touch
  • the first ends of the signal lines are adjacent to each other, and/or the first part of the first touch signal line is connected to a connecting lead, and the first part of the first touch signal line is connected to the first end of the second touch signal line. adjacent; the orthographic projection of the first portion of the second touch signal line on the substrate overlaps the orthographic projection of the first portion of the first touch signal line on the substrate.
  • the first end of the second touch signal line covers at least one first via hole.
  • the plurality of first via holes are sequentially arranged in the extending direction of the second touch signal lines.
  • the width to length ratio of each of the plurality of first vias is approximately equal to one.
  • the first portion of the second touch signal line and the first end of the second touch signal line cover at least three first via holes.
  • the first insulating layer further includes: at least one second via through its thickness;
  • the second touch signal line is also electrically connected to the first touch signal line through the second via hole;
  • a portion of the first portion of the second touch signal line on the side away from the first end of the second touch signal line covers at least one second via hole.
  • the width-to-length ratio of the second via hole is greater than the width-to-length ratio of the first via hole.
  • both the touch electrodes and the connection leads include a metal mesh structure.
  • a display device provided by an embodiment of the present disclosure, comprising:
  • a display layer located on the flexible substrate substrate
  • the encapsulation layer is located on the display layer
  • the touch substrate is located on the encapsulation layer.
  • FIG. 1 is a schematic structural diagram of the end of a touch signal line in the related art
  • FIG. 2 is a schematic structural diagram of a touch substrate according to an embodiment of the present disclosure
  • Figure 3 is a cross-sectional view along AA' in Figure 2 provided for an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of area B in FIG. 2 according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of another touch substrate provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a metal mesh structure in a touch electrode according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of connecting a connection lead and a touch signal line according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of still another touch substrate according to an embodiment of the present disclosure.
  • FIG. 9 is a cross-sectional view along CC' in FIG. 8 according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of still another touch substrate according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of still another touch substrate provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of still another touch substrate according to an embodiment of the present disclosure.
  • the touch signal line adopts a double-layer metal wiring arrangement, as shown in FIG. 1, including: an upper metal wiring 1 and a lower metal wiring 2, an upper metal wiring 1 and a lower metal wiring A first insulating layer 3 is arranged between 2.
  • the area shown in Figure 1 is the end of the Trace line.
  • the upper metal wiring 1 does not completely cover the lower metal wiring 2.
  • the touch substrate includes:
  • the substrate 4 includes: a touch area 5 and a peripheral area 6 outside the touch area 5;
  • the first metal layer 7, located on one side of the substrate 4, includes: a plurality of first touch signal lines 8; the first touch signal lines 8 are located in the peripheral area 6;
  • the first insulating layer 3 is located on the side of the first metal layer 7 away from the substrate 4;
  • the second metal layer 9 is located on the side of the first insulating layer 3 away from the first metal layer 7 and includes: a plurality of second touch signal lines 10 electrically connected to the first touch signal lines 8 in a one-to-one correspondence;
  • the control signal line 10 is located in the peripheral area 6; the orthographic projection of the edge 34 of the first end 11 of the first touch signal line 8 in its extending direction on the substrate 4, and the second touch signal line 10 electrically connected thereto
  • the orthographic projection of the edge 35 of one end 12 in its extending direction on the substrate 4 does not overlap, and the orthographic projection of the edge 34 of the first end 11 of the first touch signal line 8 in its extending direction on the substrate 4 is at least partially identical to that of the substrate 4 .
  • the orthographic projection of the second touch signal line 10 on the substrate 4 overlaps; wherein, the first end 11 of the first touch signal line 8 is the end of the first touch signal line 8 that is close to the touch area 5 in the extending direction thereof, The first end 12 of the second touch signal line 10 is the end of the second touch signal line 10 close to the touch area 5 in the extending direction thereof.
  • the orthographic projection of the edge of the first end of the first touch signal line in the extending direction on the substrate, and the first end of the second touch signal line electrically connected thereto does not overlap, and the orthographic projection of the edge of the first end of the first touch signal line on the substrate in the extending direction is at least partially and the orthographic projection of the second touch signal line on the substrate Overlap, that is, the part of the first insulating layer covering the end of the first touch signal line close to the touch area is covered by the end of the second touch signal line close to the touch area, which can be avoided when the folded product is bent at a large angle
  • the film layer is peeled off due to the break of the first insulating layer and the touch signal line is broken, which can improve product yield and improve product service life.
  • each touch signal line 13 in FIG. 2 includes a first touch signal line 8 and a second touch signal line 10 .
  • Figure 3 may be, for example, a cross-sectional view along AA' in Figure 2 .
  • FIG. 4 can be an enlarged schematic diagram of area B.
  • the first touch signal line 8 is displayed on the upper layer in FIG. 4 .
  • the touch area 5 further includes a plurality of touch electrodes 15 ;
  • the touch substrate further includes a plurality of connection leads 18 extending from the touch area 5 to the peripheral area 6 , each connecting The leads 18 are connected to the touch electrodes 15 and the touch signal lines 13 .
  • the plurality of touch electrodes 15 include a plurality of first touch electrodes 16 and a plurality of second touch electrodes 17 ; each first touch electrode 16 extends along the first direction X, and a plurality of first touch electrodes 16 The touch electrodes 16 are arranged along the second direction Y, each of the second touch electrodes 17 extends along the second direction Y, and the plurality of second touch electrodes 17 are arranged along the first direction X.
  • the first touch electrodes 16 may be divided into a plurality of first electrode blocks 27 arranged along the first direction X, and the first touch electrodes 16 in the adjacent two same first touch electrodes 16 are divided into a plurality of first electrode blocks 27 .
  • An electrode block 27 is electrically connected through the first connection portion 28
  • the second touch electrode 17 can be divided into a plurality of second electrode blocks 29 arranged along the second direction Y, and two adjacent second touch electrodes 17 .
  • the second electrode blocks 29 are electrically connected through the second connection part 30 .
  • first electrode block, the second electrode block and the second connection part may be arranged in the same layer, and the first connection part and the first electrode block, the second electrode block and the second connection part are located in different layers.
  • the second metal layer further includes: a first electrode block, a second electrode block and a second connection part, a plurality of connection leads; the first metal layer further includes a first connection part;
  • each connection lead 18 connects the touch electrode and the second touch signal line 10 and extends from the touch area 5 to the peripheral area 6 ; the first portion 23 of the second touch signal line 10 and the connection lead 18 is connected, and the first portion 23 of the second touch signal line 10 is adjacent to the first end 12 of the second touch signal line 10 .
  • the first metal layer further includes: a first electrode block, a second electrode block and a second connection part, a plurality of connection leads; the second metal layer further includes a first connection part.
  • each connection lead 18 is connected to the touch electrode and the first touch signal line 8 , and extends from the touch area 5 to the peripheral area 6 ; the first portion 31 of the first touch signal line 8 is connected to the connection lead 18 is connected, and the first portion 31 of the first touch signal line 8 is adjacent to the first end 11 of the first touch signal line 8 .
  • the second touch signal line is not shown in FIG. 5 .
  • the first electrode block and the first connection part are arranged in the same layer
  • the second electrode block and the second connection part are arranged in the same layer
  • the first connection part and the first electrode block and the second electrode block and the second electrode block are arranged in the same layer.
  • the connections are on different layers.
  • the first metal layer includes: a first electrode block, a first connection part, and a connection lead connected to the first touch electrodes, the connection lead connected to the first touch electrode and the first part of the first touch signal line connection
  • the second metal layer includes: a second electrode block, a second connection part, and a connection lead connected to the second touch electrode, the connection lead connected to the second touch electrode and the first part of the second touch signal line connect.
  • the second metal layer includes: a first electrode block, a first connection part, and a connection lead connected to the first touch electrode, and the connection lead connected to the first touch electrode and the first part of the first touch signal line
  • the first metal layer includes: a second electrode block, a second connection part, and a connection lead connected to the second touch electrode, the connection lead connected to the second touch electrode and the first part of the second touch signal line connect.
  • the touch substrate further includes pad electrodes 14 .
  • each touch signal line 13 is connected to a driver in the peripheral area 6 and the pad electrode 14 , and the driver applies the driving signal to the second touch electrode 17 through the touch signal line 13 , and receives a signal from the first touch control electrode 17 .
  • the output signal of the touch electrode 16 or the driver may apply the driving signal to the first touch electrode 16 and receive the output signal from the second touch electrode 17 .
  • the driver can determine the location where the touch occurs by detecting the sensing signals generated in the plurality of electrodes when different electrodes transmit touch signals.
  • the first touch electrodes may be driving electrodes (Tx), and the second touch electrodes may be sensing electrodes (Rx), or the first touch electrodes may be sensing electrodes (Rx), and the second touch electrodes may be sensing electrodes (Rx).
  • the control electrodes may be drive electrodes (Tx).
  • the first touch electrodes and the second touch electrodes constitute a touch structure.
  • the D area can be regarded as a repeating unit of the touch structure.
  • the outline of the D area is It is a square with a side length of 4 mm.
  • connection lead 18 is represented by a line segment, which is only to simply illustrate the connection relationship among the touch signal line, the connection lead, and the touch electrodes.
  • FIG. 4 and FIG. 5 only a straight line is used to represent the connection lead 18 to simply illustrate the connection relationship between the connection lead and the touch signal line.
  • FIG. 2 only takes the shape of the touch electrode as a rhombus for illustration. During specific implementation, the touch electrodes and the connection leads may adopt other arrangement forms.
  • the touch electrodes and the connection leads include a metal mesh structure 33 .
  • FIG. 6 one repeating unit, that is, the pattern of the D region in FIG. 2 is used as an example for illustration.
  • FIG. 7 only shows a part of the area where the metal mesh structure 33 is connected to the touch signal line.
  • the area F in FIG. 7 includes: the first end of the first touch signal line 8 in its extension direction, and the first end of the second touch signal line 10 in its extension direction. on the first end.
  • the first touch signal line 8 is shown on the upper layer as an example for illustration. As can be seen from FIG. 7 , the edge of the first end of the first touch signal line 8 in the extension direction of the first touch signal line 8 is on the edge of the substrate.
  • the orthographic projection does not overlap with the orthographic projection of the edge of the first end of the second touch signal line 10 electrically connected to it in its extending direction on the substrate, and the first touch signal line 8 in its extending direction is the first
  • the orthographic projection of the edge of the end on the substrate at least partially overlaps with the orthographic projection of the second touch signal line 10 on the substrate.
  • the metal mesh structure connected with the touch signal lines is integrally connected with the metal mesh structure of the touch electrodes, that is, the touch electrodes and the connecting leads are an integral structure, and the metal mesh structure is connected with the touch signal lines.
  • the parts can be called connecting leads.
  • the metal grid structure is formed by interweaving a plurality of metal wires, the metal grid structure includes a plurality of grid patterns, and the grid pattern is a polygon formed by a plurality of metal wires, or in other words, the metal grid is composed of a mesh
  • the grid pattern is repeated and stitched in a continuous setting.
  • the shape of the grid pattern enclosed by the metal wires may be rhombus.
  • the shape of the mesh pattern enclosed by the metal wires may be a triangle, or the shape of the mesh pattern enclosed by the metal wires may be a rectangle, or, as shown in FIG. 6 and FIG.
  • the mesh formed by the metal wires can be a hexagon, or the shape of the grid pattern surrounded by metal wires can be a combination of various shapes, such as a combination of pentagons and hexagons, or a grid surrounded by metal wires
  • the shape of the pattern may include any one or more of triangles, squares, rectangles, diamonds, trapezoids, pentagons and hexagons.
  • the grid pattern enclosed by the metal wires may be a regular shape or an irregular shape, and the sides of the grid pattern may be straight lines or curves, which are not limited in this embodiment of the present disclosure.
  • a plurality of cutouts may be provided on the metal grid, so as to realize the isolation of the grid pattern of the first touch electrodes and the grid pattern of the second touch electrodes.
  • the first touch electrodes, the second touch electrodes and the connecting wires in the form of the metal mesh structure have the advantages of small resistance, small thickness and fast response speed.
  • the sensitivity and accuracy of touch recognition can be improved.
  • the shape and size of the meshes in the metal mesh structure of the touch electrodes may be consistent with the shape and size of the meshes in the metal mesh structure of the connecting leads.
  • the first part of the second touch signal line or the first part of the first touch signal line A portion is connected to at least one metal wire.
  • the first part of the second touch signal line 10 is connected to a plurality of metal lines as an example for illustration.
  • the width of the first part of the second touch signal line and the first part of the second touch signal line in the extending direction of the touch signal line is equal to the connection area between the connecting lead and the touch signal line width.
  • the first part of the second touch signal line when the second touch signal line is connected to the connecting lead, the first part of the second touch signal line may also be the position connected to the connecting lead in the extending direction of the second touch signal line Areas within ⁇ 10 microns.
  • the first part of the first touch signal line when the first touch signal line is connected to the connecting lead, the first part of the first touch signal line may also be an area within ⁇ 10 microns of the position where the first touch signal line is connected to the connecting lead in the extending direction of the first touch signal line.
  • the first part of the second touch signal line or the first part of the second touch signal line is: in the extending direction of one touch signal line, From the area where the first metal wire is connected to the touch signal wire to the area where the last wire is connected to the touch signal wire.
  • it can also be an area within ⁇ 10 microns from the area where the first metal line is connected to the touch signal line to the area where the last metal line is connected to the touch signal line in the extending direction of one touch signal line.
  • the first end 11 of each first touch signal line 8 includes a first inclined surface 19 ;
  • the first insulating layer 3 includes a second inclined surface 20 in a region covering the first inclined surface 19 , and the first insulating layer 3 further has: in the extending direction of the first touch signal line (for example, the second direction Y in FIG. 3 ) ) are connected to the second inclined surface 20 and are respectively located on both sides of the second inclined surface 20.
  • the first plane 21 and the second plane 22; the orthographic projection of the second plane 22 on the substrate 4 and the first touch signal line 8 on the substrate The orthographic projections of 4 do not overlap each other;
  • the edge 35 of the first end 12 of the second touch signal line 10 in the extending direction thereof extends at least to the boundary between the second inclined surface 20 and the second plane 22 .
  • the edge of the first end of the second touch signal line in the extending direction extends at least to the boundary between the second inclined surface and the second plane, so that the first touch signal line can be
  • the orthographic projection of the edge of the first end in its extending direction on the substrate does not overlap with the orthographic projection of the edge of the first end of the second touch signal line electrically connected to it in its extending direction on the substrate, and the first The orthographic projection of the edge of the first end of the touch signal line in the extending direction on the substrate at least partially overlaps with the orthographic projection of the second touch signal line on the substrate, so that the area covering the first touch signal line close to the touch area
  • the part of the first insulating layer at the end is covered by the end of the second touch signal line close to the touch area.
  • the folded product When the folded product is bent at a large angle, it can avoid the occurrence of the second touch signal line at the end of the first touch signal line close to the touch area.
  • the peeling of the film layer and the breakage of the touch signal line caused by the rupture of the insulating layer can improve the product yield and prolong the service life of the product.
  • the edge 35 of the first end 12 of the second touch signal line 10 in the extending direction thereof extends to the second plane 22 .
  • the line width of the first touch signal line 8 is equal to the first touch signal line 8 .
  • Two line widths of the touch signal lines 10 are two line widths of the touch signal lines 10 .
  • the first touch signal line and the second touch signal line are within a range of 50 microns near the connection position between the first touch signal line and the second touch signal line and the corresponding electrically connected touch electrodes. Electrical connections are made through first vias penetrating the first insulating layer.
  • the first insulating layer includes: at least one first via hole 24 penetrating the thickness thereof;
  • the second touch signal line 10 is electrically connected to the first touch signal line 8 through the first via hole 24 ; and the first portion 23 of the second touch signal line 10 covers at least one first via hole 24 .
  • the area where the via hole where the second touch signal line is electrically connected to the first touch signal line is disposed is far from the first part of the second touch signal line and the first part of the first touch signal line It is far away, which affects the connection performance between the touch signal line and the connecting lead.
  • the first touch signal lines and the second touch signal lines and the second touch signal lines are within a range of 50 micrometers near the connection positions of the first touch signal lines and the corresponding electrically connected touch electrodes.
  • the touch signal lines are electrically connected through the first vias penetrating the first insulating layer, and the distance between the area where the two layers of touch signal lines are connected and the part where the touch signal lines and the connecting leads are connected is close, which can improve the connection between the touch signal lines and the connecting leads.
  • the connection performance of the connection lead improves the transmission effect of the touch signal, thereby improving the accuracy of touch recognition.
  • connection lead 18 and the second touch signal line 10 are provided and connected in the same layer as an example for illustration.
  • the connecting leads and the first touch signal lines are arranged and connected in the same layer, since the orthographic projection of the first part of the second touch signal lines on the substrate and the first part of the first touch signal lines on the substrate The orthographic projections overlap, the region where the first via hole 24 is located can still be set in the region shown in FIG. 8 , which will not be repeated here.
  • the connection lead and the second touch signal line are arranged and connected in the same layer as an example to illustrate the arrangement position of the first via hole.
  • FIG. 9 may be, for example, a cross-sectional view taken along CC' in FIG. 8 .
  • FIG. 8 does not show the first insulating layer, but only shows the region where the first via hole 24 is located.
  • the first part of the second touch signal line covers a first via hole as an example for illustration.
  • the first part of the second touch signal line may also cover more first via holes, so as to further improve the connection performance between the touch signal line and the connecting lead.
  • the first end 12 of the second touch signal line 10 covers at least one first via hole 24 .
  • the first via hole is also provided in the area adjacent to the first part of the second touch signal line so that the first touch signal line and the second touch signal line are electrically connected, that is The number of the first vias near the connection area between the connection lead and the touch signal line is increased, which further improves the connection performance between the touch signal line and the connection lead, improves the transmission effect of the touch signal, and improves the accuracy of touch recognition.
  • the plurality of first via holes 24 are arranged in sequence along the extending direction of the second touch signal line 10 (eg, the second direction Y in FIG. 10 ).
  • the shape of the orthographic projection of the first via hole on the substrate may be, for example, a rectangle, a square, a rounded rectangle, a circle, or the like. Taking a square first via as an example, the side length of the square is about 3 microns.
  • the aspect ratio of each first via hole in the plurality of first via holes is approximately equal to 1.
  • the first part of the second touch signal line and the touch signal lines in the vicinity thereof cover a plurality of first via holes arranged in sequence along the extending direction of the touch signal line, the first part of the plurality of first via holes
  • the distance between one and the last is less than the side length of one repeating unit, that is, the distance between the first and the last of the plurality of first vias is less than 4 mm.
  • the At least one first via hole is set in the area where a metal line is connected to the first part of the second touch signal line 10 or the first part of the first touch signal line, so as to improve the connection performance between the touch signal line and the connecting lead, and improve the touch
  • the transmission effect of the control signal is improved, and the accuracy of touch recognition is improved. It should be noted that in FIG. 11 , only one metal wire connected to the touch signal wire is shown.
  • the first portion 23 of the second touch signal line 10 and the first end 12 of the second touch signal line 10 cover at least three first via holes 24 .
  • the first insulating layer further includes: at least one second via hole 32 extending through its thickness;
  • the second touch signal line 10 is also electrically connected to the first touch signal line through the second via hole 32;
  • a portion 25 of the first portion 23 of the second touch signal line 10 on the side away from the first end 12 of the second touch signal line 10 covers at least one first via hole 24 .
  • a second via hole for electrically connecting the two layers of the touch signal line is further provided,
  • the connection performance of the first touch signal line and the second touch signal line is further improved, the transmission effect of the touch signal is improved, and the accuracy of touch recognition is improved.
  • the width-to-length ratio of the second via hole is greater than the width-to-length ratio of the first via hole.
  • a display device provided by an embodiment of the present disclosure includes:
  • a display layer located on the flexible substrate substrate
  • the encapsulation layer is located on the display layer
  • the touch substrate is located on the encapsulation layer.
  • the display layer includes a pixel driver circuit over a flexible substrate substrate and an electroluminescent device electrically connected to the pixel driver circuit.
  • the electroluminescent device may be, for example, an organic light emitting diode device or a quantum dot light emitting diode device.
  • the display device is any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator.
  • a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator.
  • Other essential components of the display device should be understood by those of ordinary skill in the art, and will not be described in detail here, nor should it be regarded as a limitation of the present disclosure.
  • the orthographic projection of the edge of the first end of the first touch signal line in the extending direction on the substrate, and the second touch signal line electrically connected thereto does not overlap, and the orthographic projection of the edge of the first end of the first touch signal line in its extending direction on the substrate at least partially matches the second touch signal
  • the orthographic projection of the lines on the substrate overlaps, that is, the part of the first insulating layer covering the end of the first touch signal line close to the touch area is covered by the end of the second touch signal line close to the touch area.

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Abstract

一种触控基板及显示装置，触控基板包括：基底（4），包括触控区（5）以及周边区（6）；第一金属层（7），位于基底（4）一侧，包括多条第一触控信号线（8）；第一触控信号线（8）位于周边区；第一绝缘层（3），位于第一金属层（7）背离基底（4）一侧；第二金属层（9），位于第一绝缘层（3）背离第一金属层（7）一侧，包括与第一触控信号线（8）一一对应电连接的多条第二触控信号线（10）；第二触控信号线（10）位于周边区（6）；第一触控信号线（8）的第一端（11）在基底（4）的正投影，和与其电连接的第二触控信号线（10）的第一端（12）在基底（4）的正投影不重叠，第一触控信号线（8）的第一端（11）的边缘（34）在基底（4）的正投影至少部分与第二触控信号线（10）在基底（4）的正投影重叠；第一触控信号线（8）的第一端（11）为第一触控信号线（8）靠近触控区（5）的末端，第二触控信号线（10）的第一端（12）为第二触控信号线（10）靠近触控区（5）的末端。

Description

触控基板及显示装置 技术领域
本公开涉及触控技术领域，尤其涉及触控基板及显示装置。
背景技术
随着有源矩阵有机发光二极管(Active-matrix organic light-emitting diode，AMLOED)显示行业的飞速发展，显示装置也朝着窄边框和轻薄化发展。目前，采用柔性多层一体化集成触控技术(Flexible Multi Layer On Cell，FMLOC)便可更好地实现这些高的需求。采用FMLOC技术的显示装置在设计时，触控结构层直接制作在叠设的发光结构层和封装层上面可以很好地实现产品的轻薄化。
FMLOC技术中，将触控信号线(Trace线)分别从显示基板边缘接入显示区触控电极来传输和接收信号，并通过手指触碰显示区触控电极产生的容值的变化来实现触控功能。现有技术中，折叠产品的Trace线采用双层金属走线设置，两层金属走线之间设置无机层，但是当折叠产品在大角度弯折时，在Trace线的末端容易出现无机层断裂导致膜层剥离(Peeling)以及Trace线出现断裂，影响产品使用寿命。
发明内容
本公开实施例提供的一种触控基板，包括：
基底，包括：触控区以及位于触控区之外的周边区；
第一金属层，位于基底一侧，包括：多条第一触控信号线；第一触控信号线位于周边区；
第一绝缘层，位于第一金属层背离基底一侧；
第二金属层，位于绝缘层背离第一金属层一侧，包括：与第一触控信号线一一对应电连接的多条第二触控信号线；第二触控信号线位于周边区；第 一触控信号线的第一端在其延伸方向上的边缘在基底的正投影，和与其电连接的第二触控信号线的第一端在其延伸方向上的边缘在基底的正投影不重叠，且第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影至少部分与第二触控信号线在基底的正投影重叠；其中，第一触控信号线的第一端为第一触控信号线在其延伸方向上靠近触控区的末端，第二触控信号线的第一端为第二触控信号线在其延伸方向上靠近触控区的末端。
在一些实施例中，每一第一触控信号线的第一端包括第一倾斜表面；
第一绝缘层在覆盖第一倾斜表面的区域包括第二倾斜表面，第一绝缘层还具有：在第一触控信号线的延伸方向上与第二倾斜表面连接、且分别位于第二倾斜表面两侧的第一平面和第二平面；第二平面在基底的正投影与第一触控信号线在基底的正投影互不交叠；
第二触控信号线的第一端在其延伸方向上的边缘至少延伸至第二倾斜表面与第二平面的交界。
在一些实施例中，第二触控信号线的第一端在其延伸方向上的边缘延伸至第二平面。
在一些实施例中，在垂直于第一触控信号线的延伸方向上，第一触控信号线的线宽等于第二触控信号线的线宽。
在一些实施例中，还包括触控电极，设置在触控区域，第一触控信号线和第二触控信号线与对应电连接的触控电极的连接位置处附近50微米范围内，第一触控信号线和第二触控信号线通过贯穿第一绝缘层的第一过孔电连接。
在一些实施例中，第二金属层和/或所述第一金属层还包括：
多条连接引线，从触控区延伸到周边区；与触控电极连接；第二触控信号线的第一部分与一条连接引线连接，且第二触控信号线的第一部分与第二触控信号线的第一端相邻，和/或，第一触控信号线的第一部分与一条连接引线连接，且第一触控信号线的第一部分与第二触控信号线的第一端相邻；第二触控信号线的第一部分在基底的正投影与第一触控信号线的第一部分在基底的正投影重叠。
在一些实施例中，第二触控信号线的第一端覆盖至少一个第一过孔。
在一些实施例中，多个第一过孔在第二触控信号线延伸方向上依次排列。
在一些实施例中，多个第一过孔中的每一第一过孔的宽长比大约等于1。
在一些实施例中，第二触控信号线的第一部分和第二触控信号线的第一端至少覆盖三个第一过孔。
在一些实施例中，第一绝缘层还包括：至少一个贯穿其厚度的第二过孔；
第二触控信号线还通过第二过孔与第一触控信号线电连接；
第二触控信号线的第一部分远离第二触控信号线的第一端一侧的部分覆盖至少一个第二过孔。
在一些实施例中，第二过孔的宽长比大于第一过孔的宽长比。
在一些实施例中，触控电极以及连接引线均包括金属网格结构。
本公开实施例提供的一种显示装置，包括:
本公开实施例提供的触控基板；
柔性衬底基板；
显示层，位于柔性衬底基板上；
封装层，位于显示层上；
触控基板位于封装层上。
附图说明
为了更清楚地说明本公开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要介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域的普通技术人员来讲，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为相关技术中触控信号线末端的结构示意图；
图2为本公开实施例提供的一种触控基板的结构示意图；
图3为本公开实施例提供的沿图2中AA’的截面图；
图4为本公开实施例提供的图2中区域B的示意图；
图5为本公开实施例提供的另一种触控基板的结构示意图；
图6为本公开实施例提供的一种触控电极中金属网格结构的示意图；
图7为本公开实施例提供的一种连接引线与触控信号线连接的示意图；
图8为本公开实施例提供的又一种触控基板的结构示意图；
图9为本公开实施例提供的沿图8中CC’的截面图；
图10为本公开实施例提供的又一种触控基板的结构示意图；
图11为本公开实施例提供的又一种触控基板的结构示意图；
图12为本公开实施例提供的又一种触控基板的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。并且在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。
需要注意的是，附图中各图形的尺寸和形状不反映真实比例，目的只是示意说明本公开内容。并且自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
相关技术中，触控信号线(Trace线)采用双层金属走线设置，如图1所示，包括：上层金属走线1和下层金属走线2，上层金属走线1和下层金属走线2之间设置第一绝缘层3，图1中示出的区域为Trace线的末端，上层金属走线1并未完全覆盖下层金属走线2，当折叠产品在大角度弯折时，在Trace线的末端容易出现第一绝缘层断裂导致的膜层剥离(Peeling)以及Trace线出现断裂，影响产品使用寿命。
针对相关技术中存在的上述问题，本公开实施例提供了一种触控基板，如图2、图3、图4所示，触控基板包括：
基底4，包括：触控区5以及位于触控区5之外的周边区6；
第一金属层7，位于基底4一侧，包括：多条第一触控信号线8；第一触控信号线8位于周边区6；
第一绝缘层3，位于第一金属层7背离基底4一侧；
第二金属层9，位于第一绝缘层3背离第一金属层7一侧，包括：与第一触控信号线8一一对应电连接的多条第二触控信号线10；第二触控信号线10位于周边区6；第一触控信号线8的第一端11在其延伸方向上的边缘34在基底4的正投影，和与其电连接的第二触控信号线10的第一端12在其延伸方向上的边缘35在基底4的正投影不重叠，且第一触控信号线8的第一端11在其延伸方向上的边缘34在基底4的正投影至少部分与第二触控信号线10在基底4的正投影重叠；其中，第一触控信号线8的第一端11为第一触控信号线8在其延伸方向上靠近触控区5的末端，第二触控信号线10的第一端12为第二触控信号线10在其延伸方向上靠近触控区5的末端。
本公开实施例提供的触控基板，第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影，和与其电连接的第二触控信号线的第一端在其延伸方向上的边缘在基底的正投影不重叠，且第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影至少部分与第二触控信号线在基底的正投影重叠，即覆盖第一触控信号线靠近触控区的末端的第一绝缘层的部分被第二触控信号线靠近触控区的末端覆盖，当折叠产品在大角度弯折时，可以避免 在第一触控信号线靠近触控区的末端出现第一绝缘层断裂导致的膜层剥离以及触控信号线断裂，可以提高产品良率，提高产品使用寿命。
需要说明的是，图2中的每一触控信号线13即包括第一触控信号线8和第二触控信号线10。图3例如可以是沿图2中AA’的截面图。图4例如可以区域B的放大示意图，为了便于清楚地示出第一触控信号线和第二触控信号线的投影关系，图4中将第一触控信号线8置于上层显示。
在一些实施例中，如图2所示，触控区5还包括多个触控电极15；触控基板还包括从触控区5延伸到周边区6的多条连接引线18，每一连接引线18连接触控电极15与触控信号线13。
在一些实施例中，多个触控电极15包括多个第一触控电极16以及多个第二触控电极17；每一第一触控电极16沿第一方向X延伸，多个第一触控电极16沿第二方向Y排列，每一第二触控电极17沿第二方向Y延伸，多个第二触控电极17沿第一方向X排列。
在一些实施例中，如图2所示，第一触控电极16可以划分为多个沿第一方向X排列的第一电极块27，相邻两个同一第一触控电极16中的第一电极块27之间通过第一连接部28电连接，第二触控电极17可以划分为多个沿第二方向Y排列的第二电极块29，相邻两个同一第二触控电极17中的第二电极块29之间通过第二连接部30电连接。
在具体实施时，可以是第一电极块、第二电极块以及第二连接部同层设置，第一连接部与第一电极块、第二电极块以及第二连接部位于不同层。
在一些实施例中，第二金属层还包括：第一电极块、第二电极块以及第二连接部，多条连接引线；第一金属层还包括第一连接部；
如图4所示，每一连接引线18连接触控电极与第二触控信号线10，且从触控区5延伸到周边区6；第二触控信号线10的第一部分23与连接引线18连接，且第二触控信号线10的第一部分23与第二触控信号线10的第一端12相邻。
或者，在一些实施例中，第一金属层还包括：第一电极块、第二电极块 以及第二连接部，多条连接引线；第二金属层还包括第一连接部。
如图5所示，每一连接引线18连接触控电极与第一触控信号线8，且从触控区5延伸到周边区6；第一触控信号线8的第一部分31与连接引线18连接，且第一触控信号线8的第一部分31与第一触控信号线8的第一端11相邻。
需要说明的是，图5中并未示出第二触控信号线。
当然，也可以是，第一电极块与第一连接部同层设置，第二电极块与第二连接部同层设置，且第一连接部和第一电极块与第二电极块和第二连接部位于不同层。例如，第一金属层包括：第一电极块，第一连接部，以及与第一触控电极连接的连接引线，与第一触控电极连接的连接引线与第一触控信号线的第一部分连接，第二金属层包括：第二电极块，第二连接部，以及与第二触控电极连接的连接引线，与第二触控电极连接的连接引线与第二触控信号线的第一部分连接。或者，第二金属层包括：第一电极块，第一连接部，以及与第一触控电极连接的连接引线，与第一触控电极连接的连接引线与第一触控信号线的第一部分连接，第一金属层包括：第二电极块，第二连接部，以及与第二触控电极连接的连接引线，与第二触控电极连接的连接引线与第二触控信号线的第一部分连接。
需要说明的是，如图2所示，触控基板还包括焊盘电极14。在具体实施时，每一触控信号线13在周边区6与焊盘电极14连接到驱动器，驱动器将驱动信号通过触控信号线13施加到第二触控电极17上，并且接收来自第一触控电极16的输出信号，或者，驱动器可以将驱动信号施加到第一触控电极16，并且接收来自第二触控电极17的输出信号。驱动器通过检测不同电极发射触控信号时多个电极中产生的感应信号，即可确定出触摸发生的位置。在一些实施例中，第一触控电极可以是驱动电极(Tx)，第二触控电极可以是感应电极(Rx)，或者，第一触控电极可以是感应电极(Rx)，第二触控电极可以是驱动电极(Tx)。
需要说明的是，第一触控电极和第二触控电极组成触控结构，如图2所 示，D区域可以看作触控结构的一个重复单元，在一些实施例中，D区域的轮廓为正方形，边长为4毫米。
需要说明的是，图2中通过线段表示连接引线18，仅是为了简单示意触控信号线、连接引线以及触控电极之间的连接关系。图4、图5中也仅是通过一条直线表示连接引线18，以简单示意连接引线与触控信号线的连接关系。并且，图2仅以触控电极的形状为菱形进行举例说明。在具体实施时，触控电极以及连接引线可以采用其他设置形式。
在一些实施例中，如图6、图7所示，触控电极以及连接引线均包括金属网格结构33。
需要说明的是，图6中以一个重复单元即图2中的D区域的图案为例进行举例说明。
需要说明的是，图7中仅示出金属网格结构33与触控信号线连接的部分区域。图7中区域F包括：第一触控信号线8在其延伸方向的第一在其延伸方向上的第一端，以及第二触控信号线10在其延伸方向的第一在其延伸方向上的第一端。图7中，以第一触控信号线8在上层示出为例进行说明，从图7中可以看出，第一触控信号线8在其延伸方向上的第一端的边缘在基底的正投影，和与其电连接的第二触控信号线10在其延伸方向上的第一端的边缘在基底的正投影不重叠，且第一触控信号线8在其延伸方向上的第一端的边缘在基底的正投影至少部分与第二触控信号线10在基底的正投影重叠。
在具体实施时，与触控信号线连接的金属网格结构与触控电极的金属网格结构一体连接，即触控电极以及连接引线为一体结构，金属网格结构中与触控信号线连接的部分可以被称为连接引线。
在具体实施时，金属网格结构由多条金属线交织形成，金属网格结构包括多个网格图案，网格图案是由多条金属线构成的多边形，或者说，金属网格是由网格图案重复且连续设置拼接而成。金属线围成的网格图案的形状可以为菱形。或者，金属线围成的网格图案的形状可以为三角形，或者，金属线围成的网格图案的形状可以为矩形，或者，如图6、图7所示，金属线围成 的网格图案26的形状可以为六边形，或者，金属线围成的网格图案的形状可以为多种形状的组合，如五边形和六边形的组合，或者，金属线围成的网格图案的形状可以包括三角形、正方形、矩形、菱形、梯形、五边形和六边形中的任意一种或多种。在具体实施时，金属线围成的网格图案可以为规则的形状，或者为不规则的形状，网格图案的边可以为直线，或者可以为曲线，本公开实施例在此不做限定。
在具体实施时，可以在金属网格上设置有多个切口，以实现第一触控电极的网格图案与第二触控电极的网格图案的隔离。
金属网格结构形式的第一触控电极、第二触控电极以及连接引线具有电阻小、厚度小和反应速度快等优点。可以提高触摸识别的灵敏度以及准确度。
在具体实施时，触控电极的金属网格结构中网格的形状、尺寸可以与连接引线的金属网格结构中网格的形状、尺寸一致。
在具体实施时，金属网格结构与第二触控信号线的第一部分或第一触控信号线的第一部分连接时，第二触控信号线的第一部分或第一触控信号线的第一部分与至少一个金属线连接。图7中，以第二触控信号线10的第一部分与多个金属线连接为例进行举例说明。
需要说明的是，图4、图5中以第二触控信号线的第一部分、第二触控信号线的第一部分在触控信号线延伸方向的宽度等于连接引线与触控信号线连接区域的宽度。
当然，在具体实施时，当第二触控信号线与连接引线连接时，第二触控信号线的第一部分，也可以是在第二触控信号线延伸方向上，与连接引线连接的位置±10微米以内的区域。当第一触控信号线与连接引线连接时，第一触控信号线的第一部分，也可以是在第一触控信号线延伸方向上，与连接引线连接的位置±10微米以内的区域。
在具体实施时，当连接引线以及触控电极为金属网格结构时，第二触控信号线的第一部分或第二触控信号线的第一部分为：在一条触控信号线延伸方向上，第一根金属线与触控信号线连接的区域到最后一根金属线与触控信 号线连接的区域。当然，也可以是在一条触控信号线延伸方向上，第一根金属线与触控信号线连接的区域到最后一根金属线与触控信号线连接的区域±10微米以内的区域。
在一些实施例中，如图3所示，每一第一触控信号线8的第一端11包括第一倾斜表面19；
第一绝缘层3在覆盖第一倾斜表面19的区域包括第二倾斜表面20，第一绝缘层3还具有：在第一触控信号线的延伸方向上(例如图3中的第二方向Y)与第二倾斜表面20连接、且分别位于第二倾斜表面20两侧的第一平面21和第二平面22；第二平面22在基底4的正投影与第一触控信号线8在基底4的正投影互不交叠；
第二触控信号线10的第一端12在其延伸方向上的边缘35至少延伸至第二倾斜表面20与第二平面22的交界。
本公开实施例提供的触控基板，第二触控信号线的第一端在其延伸方向上的边缘至少延伸至第二倾斜表面与第二平面的交界，则可以使得第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影，和与其电连接的第二触控信号线的第一端在其延伸方向上的边缘在基底的正投影不重叠，且第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影至少部分与第二触控信号线在基底的正投影重叠，从而使得覆盖第一触控信号线靠近触控区的末端的第一绝缘层的部分被第二触控信号线靠近触控区的末端覆盖，当折叠产品在大角度弯折时，可以避免在第一触控信号线靠近触控区的末端出现第一绝缘层断裂导致的膜层剥离以及触控信号线断裂，可以提高产品良率，提高产品使用寿命。
在一些实施例中，如图3所示，第二触控信号线10的第一端12在其延伸方向上的边缘35延伸至第二平面22。
在一些实施例中，如图4所示，在垂直于第一触控信号线8的延伸方向(例如图4中的第二方向Y)上，第一触控信号线8的线宽等于第二触控信号线10的线宽。
在一些实施例中，第一触控信号线和第二触控信号线与对应电连接的触控电极的连接位置处附近50微米范围内，第一触控信号线和第二触控信号线通过贯穿第一绝缘层的第一过孔电连接。
即在一些实施例中，如图8、图9所示，第一绝缘层包括：至少一个贯穿其厚度的第一过孔24；
第二触控信号线10通过第一过孔24与第一触控信号线8电连接；且第二触控信号线10的第一部分23覆盖至少一个第一过孔24。
需要说明的是，相关技术中，第二触控信号线与第一触控信号线电连接的过孔设置的区域距离第二触控信号线的第一部分以及第一触控信号线的第一部分较远，影响触控信号线与连接引线的连接性能。
本公开实施例提供的触控基板，第一触控信号线和第二触控信号线与对应电连接的触控电极的连接位置处附近50微米范围内，第一触控信号线和第二触控信号线通过贯穿第一绝缘层的第一过孔电连接，两层触控信号线连接的区域和触控信号线与连接引线连接的部分之间距离接近，可以提高触控信号线与连接引线的连接性能，提高触控信号的传输效果，从而可以提高触摸识别的准确度。
需要说明的是，图8中，以连接引线18与第二触控信号线10同层设置且连接为例进行举例说明。在具体实施时，对于连接引线与第一触控信号线同层设置且连接的情况，由于第二触控信号线的第一部分在基底的正投影与第一触控信号线的第一部分在基底的正投影重叠，第一过孔24所在区域仍可以设置在如图8所示的区域，在此不再赘述。后续本公开均以连接引线与第二触控信号线同层设置且连接为例对第一过孔设置位置进行举例说明。
需要说明的是，图9例如可以是沿图8中CC’的截面图，图8中并未示出第一绝缘层，仅示出第一过孔24所在区域。
需要说明的是，图9中以第二触控信号线的第一部分覆盖一个第一过孔为例进行举例说明。当然在具体实施时第二触控信号线的第一部分也可以覆盖更多第一过孔，进一步提高触控信号线与连接引线的连接性能。
在一些实施例中，如图10所示，第二触控信号线10的第一端12覆盖至少一个第一过孔24。
即本公开实施例提供的触控基板，在与第二触控信号线的第一部分相邻的区域也设置第一过孔使得第一触控信号线和第二触控信号线电连接，即增加连接引线与触控信号线连接区域附近的第一过孔设置数量，进一步提高触控信号线与连接引线的连接性能，提高触控信号的传输效果，提高触摸识别的准确度。
在一些实施例中，如图10所示，多个第一过孔24在第二触控信号线10延伸方向上(例如图10中第二方向Y)依次排列。
在一些实施例中，第一过孔在基底的正投影的形状例如可以是矩形、正方形、圆角矩形、圆形等。以正方形的第一过孔为例，正方形的边长约为3微米。
在一些实施例中，当第一过孔在基底的正投影的形状为矩形时，如图10所示，多个第一过孔中的每一第一过孔的宽长比大约等于1。
在一些实施例中，第二触控信号线的第一部分及其附近的触控信号线覆盖多个沿触控信号线延伸方向依次排列的第一过孔时，多个第一过孔中第一个和最后一个之间的距离小于一个重复单元的边长，即多个第一过孔中第一个和最后一个之间的距离小于4毫米。
在具体实施时，如图11所示，当第二触控信号线10的第一部分或第一触控信号线的第一部分与金属网格结构33中的多个金属线连接时，可以在每一个金属线与第二触控信号线10的第一部分或第一触控信号线的第一部分连接的区域均设置至少一个第一过孔，提高触控信号线与连接引线的连接性能，提高触控信号的传输效果，提高触摸识别的准确度。需要说明的是如图11中，仅示出一条与触控信号线连接的金属线。
在一些实施例中，如图10所示，第二触控信号线10的第一部分23和第二触控信号线10的第一端12至少覆盖三个第一过孔24。
在一些实施例中，如图12所示，第一绝缘层还包括：至少一个贯穿其厚 度的第二过孔32；
第二触控信号线10还通过第二过孔32与第一触控信号线电连接；
第二触控信号线10的第一部分23远离第二触控信号线10的第一端12一侧的部分25覆盖至少一个第一过孔24。
即本公开实施例提供的触控基板，在触控信号线与连接引线连接的区域以及触控信号线末端之外的区域，还设置使得两层触控信号线电连接的第二过孔，进一步提高第一触控信号线和第二触控信号线的连接性能，提高触控信号的传输效果，提高触摸识别的准确度。
在一些实施例中，第二过孔的宽长比大于第一过孔的宽长比。
即在一些实施例中，第一过孔的形状为正方形，第二过孔的形状为长方形。本公开实施例提供的一种显示装置，包括：
本公开实施例提供的触控基板；
柔性衬底基板；
显示层，位于柔性衬底基板上；
封装层，位于显示层上；
触控基板位于封装层上。
在一些实施例中，显示层包括位于柔性衬底基板之上的像素驱动电路以及与像素驱动电路电连接的电致发光器件。电致发光器件例如可以是有机发光二极管器件或量子点发光二极管器件。
本公开实施例提供的显示装置为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。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，也不应作为对本公开的限制。该显示装置的实施可以参见上述触控基板的实施例，重复之处不再赘述。
综上，本公开实施例提供的触控基板及显示装置，第一触控信号线的第一端在其延伸方向上的边缘在基底的正投影，和与其电连接的第二触控信号线的第一端在其延伸方向上的边缘在基底的正投影不重叠，且第一触控信号 线的第一端在其延伸方向上的边缘在基底的正投影至少部分与第二触控信号线在基底的正投影重叠，即覆盖第一触控信号线靠近触控区的末端的第一绝缘层的部分被第二触控信号线靠近触控区的末端覆盖，当折叠产品在大角度弯折时，可以避免在第一触控信号线靠近触控区的末端出现第一绝缘层断裂导致的膜层剥离以及触控信号线断裂，可以提高产品良率，提高产品使用寿命。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (14)

  1. 一种触控基板，其中，所述触控基板包括：
    基底，包括：触控区以及位于所述触控区之外的周边区；
    第一金属层，位于所述基底一侧，包括：多条第一触控信号线；所述第一触控信号线位于所述周边区；
    第一绝缘层，位于所述第一金属层背离所述基底一侧；
    第二金属层，位于所述绝缘层背离所述第一金属层一侧，包括：与所述第一触控信号线一一对应电连接的多条第二触控信号线；所述第二触控信号线位于所述周边区；所述第一触控信号线的第一端在其延伸方向上的边缘在所述基底的正投影，和与其电连接的所述第二触控信号线的第一端在其延伸方向上的边缘在所述基底的正投影不重叠，且所述第一触控信号线的第一端在其延伸方向上的边缘在所述基底的正投影至少部分与所述第二触控信号线在所述基底的正投影重叠；其中，所述第一触控信号线的第一端为所述第一触控信号线在其延伸方向上靠近所述触控区的末端，所述第二触控信号线的第一端为所述第二触控信号线在其延伸方向上靠近所述触控区的末端。
  2. 根据权利要求1所述的触控基板，其中，每一所述第一触控信号线的第一端包括第一倾斜表面；
    所述第一绝缘层在覆盖所述第一倾斜表面的区域包括第二倾斜表面，所述第一绝缘层还具有：在所述第一触控信号线的延伸方向上与所述第二倾斜表面连接、且分别位于所述第二倾斜表面两侧的第一平面和第二平面；所述第二平面在所述基底的正投影与所述第一触控信号线在所述基底的正投影互不交叠；
    所述第二触控信号线的第一端在其延伸方向上的边缘至少延伸至所述第二倾斜表面与所述第二平面的交界。
  3. 根据权利要求2所述的触控基板，其中，所述第二触控信号线的第一端在其延伸方向上的边缘延伸至所述第二平面。
  4. 根据权利要求2或3所述的触控基板，其中，在垂直于所述第一触控信号线的延伸方向上，所述第一触控信号线的线宽等于所述第二触控信号线的线宽。
  5. 根据权利要求1所述的触控基板，其中，还包括触控电极，设置在所述触控区域，所述第一触控信号线和所述第二触控信号线与对应电连接的所述触控电极的连接位置处附近50微米范围内，所述第一触控信号线和所述第二触控信号线通过贯穿所述第一绝缘层的第一过孔电连接。
  6. 根据权利要求5所述的触控基板，其中，所述第二金属层和/或所述第一金属层还包括：
    多条连接引线，从所述触控区延伸到所述周边区；与所述触控电极连接；所述第二触控信号线的第一部分与一条所述连接引线连接，且所述第二触控信号线的第一部分与所述第二触控信号线的第一端相邻，和/或，所述第一触控信号线的第一部分与一条所述连接引线连接，且所述第一触控信号线的第一部分与所述第二触控信号线的第一端相邻；所述第二触控信号线的第一部分在所述基底的正投影与所述第一触控信号线的第一部分在所述基底的正投影重叠。
  7. 根据权利要求5所述的触控基板，其中，所述第二触控信号线的第一端覆盖至少一个所述第一过孔。
  8. 根据权利要求7所述的触控基板，其中，多个所述第一过孔在所述第二触控信号线延伸方向上依次排列。
  9. 根据权利要求7所述的触控基板，其中，多个所述第一过孔中的每一所述第一过孔的宽长比大约等于1。
  10. 根据权利要求7所述的触控基板，其中，所述第二触控信号线的第一部分和所述第二触控信号线的第一端至少覆盖三个所述第一过孔。
  11. 根据权利要求5～10任一项所述的触控基板，其中，所述第一绝缘层还包括：至少一个贯穿其厚度的第二过孔；
    所述第二触控信号线还通过所述第二过孔与所述第一触控信号线电连接；
    所述第二触控信号线的第一部分远离所述第二触控信号线的第一端一侧的部分覆盖至少一个所述第二过孔。
  12. 根据权利要求11所述的触控基板，其中，所述第二过孔的宽长比大于所述第一过孔的宽长比。
  13. 根据权利要求6所述的触控基板，其中，所述触控电极以及所述连接引线均包括金属网格结构。
  14. 一种显示装置，其中，包括：
    根据权利要求1～13任一项所述的触控基板；
    柔性衬底基板；
    显示层，位于所述柔性衬底基板上；
    封装层，位于所述显示层上；
    所述触控基板位于所述封装层上。
PCT/CN2021/084732 2021-03-31 2021-03-31 触控基板及显示装置 WO2022205212A1 (zh)

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CN111240518A (zh) * 2020-01-13 2020-06-05 合肥维信诺科技有限公司 显示面板及显示装置
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