Touch display panel and display device

Abstract

Disclosed are a touch display panel and a display device. The touch display panel comprises a base substrate, comprising: a touch area and a peripheral area surrounding the touch area; a plurality of touch electrodes; and a plurality of touch signal lines, wherein the touch signal lines are electrically connected to the touch electrodes, each touch signal line comprises a first portion located on one side of the touch area in a first direction, at least some of the touch signal lines each further comprise a second portion located in the touch area and electrically connected to a corresponding first portion, and the second portions and the touch electrodes are located in different film layers. The touch display panel comprises a multi-layer touch conductive layer, comprising: a first touch conductive layer comprising portions of the plurality of touch electrodes; a second touch conductive layer located on the side of the first touch conductive layer facing away from the base substrate and comprising the remaining portions of the plurality of touch electrodes; and a third touch conductive layer located between the first touch conductive layer and the base substrate, or located on the side of the second touch conductive layer facing away from the base substrate, wherein the third touch conductive layer comprises the second portions.

Description

Touch display panel and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a touch display panel and a display device. Background Art

[0002] The touch display products of the existing technology adopt flexible multi-layer integrated touch technology (Flexible Multi Layer On Cell, FMLOC), that is, the touch structure layer is directly made on the stacked light-emitting structure layer and packaging layer, which can well achieve lightweight and thin products.

[0003] The FMLOC touch structure includes touch electrodes and touch traces arranged on the display panel's encapsulation layer. The touch electrodes are located in the display area, while the touch traces are located in a peripheral area surrounding the display area. Because the touch traces occupy the area of ​​the peripheral area, even if the size of the touch traces is reduced, the effect of achieving a narrow bezel is limited.

[0004] Summary of the Invention

[0005] An embodiment of the present disclosure provides a touch display panel, the touch display panel comprising:

[0006] The base substrate includes a touch area and a peripheral area surrounding the touch area;

[0007] A plurality of touch electrodes are located on one side of the base substrate in the touch area;

[0008] A plurality of touch signal lines are located on the same side of the substrate as the touch electrodes; the touch signal lines are electrically connected to the touch electrodes; the touch signal lines include a first portion located on one side of the touch area in a first direction; at least some of the touch signal lines further include a second portion located in the touch area and electrically connected to the first portion, the second portion and the touch electrodes being located in a different film layer;

[0009] The touch display panel includes: a multi-layer touch conductive layer, including:

[0010] A first touch conductive layer; the first touch conductive layer includes a portion of a plurality of touch electrodes;

[0011] a second touch conductive layer, located on a side of the first touch conductive layer facing away from the base substrate; the second touch conductive layer includes the remaining parts of the plurality of touch electrodes;

[0012] The third touch conductive layer is located between the first touch conductive layer and the base substrate, or located on a side of the second touch conductive layer away from the base substrate; the third touch conductive layer includes a second portion.

[0013] In some embodiments, the plurality of touch electrodes include:

[0014] A plurality of first touch electrodes extending along a second direction and arranged along the first direction; the first touch electrodes include a plurality of first sub-electrodes arranged along the second direction, and the second direction intersects the first direction;

[0015] A plurality of second touch electrodes are arranged along the second direction and extend along the first direction; the second touch electrodes include: a plurality of second sub-electrodes arranged along the first direction, and a bridge electrode electrically connecting two adjacent second sub-electrodes;

[0016] The first touch conductive layer includes a bridge electrode, and the second touch conductive layer includes a first sub-electrode and a second sub-electrode;

[0017] Multiple touch signal lines include:

[0018] a plurality of first touch signal lines; the first touch electrode is electrically connected to at least one first touch signal line, and the first touch signal line includes a second portion;

[0019] A plurality of second touch signal lines; the second touch electrode is electrically connected to at least one second touch signal line.

[0020] In some embodiments, the second portion of the first touch signal line includes: a first sub-portion extending along the first direction and electrically connected to the first portion;

[0021] The second portion of at least part of the first touch signal line further includes: a second sub-portion extending along the second direction and electrically connected to the first sub-portion and the touch electrode;

[0022] The orthographic projection of the second sub-portion on the base substrate overlaps with the orthographic projections of the first touch electrode and the bridge electrode on the base substrate, and the orthographic projection of the second sub-portion on the base substrate does not overlap with the orthographic projection of the second sub-electrode on the base substrate.

[0023] In some embodiments, an orthographic projection of the first sub-portion on the base substrate overlaps with an orthographic projection of the first sub-electrode on the base substrate, and an orthographic projection of the first sub-portion on the base substrate does not overlap with an orthographic projection of the second touch electrode on the base substrate.

[0024] The orthographic projection of the first sub-portion on the base substrate falls into a region between the orthographic projections of two adjacent second touch electrodes on the base substrate.

[0025] In some embodiments, an orthographic projection of the first sub-portion on the substrate overlaps with an orthographic projection of the first sub-electrode on the substrate;

[0026] An orthographic projection of at least a portion of the first sub-portion on the substrate overlaps with an orthographic projection of the second sub-electrode on the substrate;

[0027] The total area S1 of the overlapping region of the orthographic projection of the first sub-portion on the substrate and the orthographic projection of the second sub-electrode on the substrate, and the area S2 of the orthographic projection of the first touch signal line on the substrate satisfy: S1 / S2≤10%;

[0028] And / or, the length L1 in the first direction of the overlapping area of ​​the orthographic projection of the first sub-portion on the substrate and the orthographic projection of the second sub-electrode on the substrate and the length L2 of the orthographic projection of the first touch signal line on the substrate satisfy: L1 / L2≤10%.

[0029] In some embodiments, the second touch conductive layer further includes: a plurality of first dummy electrodes; the first dummy electrodes are insulated from the touch electrodes;

[0030] The first dummy electrode is located between the first sub-electrodes of two adjacent different first touch electrodes, and the first dummy electrode is located between the second sub-electrodes of two adjacent different second touch electrodes;

[0031] An orthographic projection of at least a portion of the first sub-portion on the base substrate overlaps with an orthographic projection of the first dummy electrode on the base substrate.

[0032] In some embodiments, at least part of the second portion of the first touch signal line includes first width regions and second width regions alternately arranged.

[0033] The orthographic projection of the first width region on the substrate falls within the orthographic projection of the first sub-electrode on the substrate;

[0034] An orthographic projection of at least a portion of the second width region on the base substrate overlaps an orthographic projection of the bridge electrode on the base substrate;

[0035] The orthographic projection of at least a portion of the second width region on the substrate falls within the orthographic projection of the region between two adjacent second sub-electrodes on the substrate, or the orthographic projection of at least a portion of the second width region on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate;

[0036] The width of the first width region in a direction perpendicular to the extending direction thereof is greater than the width of the second width region in a direction perpendicular to the extending direction thereof.

[0037] In some embodiments, in the first sub-portion, the orthographic projection of the first width region on the substrate falls within the orthographic projection of the first sub-electrode on the substrate; the orthographic projection of the second width region on the substrate falls within the orthographic projection of the region between two adjacent second sub-electrodes on the substrate 1, or the orthographic projection of the second width region on the substrate overlaps with the orthographic projection of the second sub-electrode 2021 on the substrate.

[0038] In the second sub-portion, the orthographic projection of the first width region on the substrate falls within the orthographic projection of the first sub-electrode on the substrate, and the orthographic projection of the second width region on the substrate overlaps with the orthographic projection of the bridge electrode on the substrate 1 .

[0039] In some embodiments, in the touch area, the pattern of the orthographic projection of the touch signal line on the base substrate includes a plurality of grids;

[0040] The number of grids included in the second width region in the direction perpendicular to the extension direction is smaller than the number of grids included in the first width region in the direction perpendicular to the extension direction.

[0041] In some embodiments, the second width region pattern is a line type.

[0042] In some embodiments, an end of the second sub-portion away from the first sub-portion is electrically connected to an end of the first touch electrode.

[0043] In some embodiments, the plurality of first touch signal lines are divided into n first touch signal line groups; n is a positive integer;

[0044] The first touch signal lines in the first touch signal line group correspond one-to-one to the first touch electrodes;

[0045] In each first touch signal line group, first sub-portions of the plurality of first touch signal lines are sequentially arranged along the second direction, and second sub-portions of the plurality of first touch signal lines are sequentially arranged along the first direction.

[0046] In some embodiments, in the direction from the second sub-portion to the first sub-portion, the length of the first sub-portion in the first touch signal line group in the first direction gradually increases;

[0047] In a direction in which the touch area moves away from the first portion, the length of the second sub-portion in the first touch signal line group in the second direction gradually increases.

[0048] In some embodiments, the first subportion and / or the second subportion of the remaining second portion except the second portion electrically connected to the first touch electrode farthest from the first portion includes a first compensation portion;

[0049] The first compensation portion extends in a broken line;

[0050] Of the two first touch signal lines of the first touch signal line group, the first touch signal line electrically connected to the first touch electrode closer to the first portion includes a greater number of first compensation portions than the first touch signal line electrically connected to the first touch electrode farther from the first portion.

[0051] Of the two first touch signal lines of the first touch signal line group, a total length of the first compensation portion included in the first touch signal line electrically connected to the first touch electrode closer to the first portion is greater than a total length of the first compensation portion included in the first touch signal line electrically connected to the first touch electrode farther from the first portion;

[0052] The orthographic projection of the first compensation portion on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate.

[0053] In some embodiments, in a direction in which the touch area moves away from the first portion, the line width of the second portion in the first touch signal line group increases gradually in a direction perpendicular to the extension direction thereof.

[0054] In some embodiments, the second portion of at least some of the first touch signal lines includes at least one second compensation portion;

[0055] The width of the second compensation portion in the direction perpendicular to the extension direction is greater than the width of the remaining area of ​​the second portion in the direction perpendicular to the extension direction;

[0056] Of the two first touch signal lines of the first touch signal line group, the first touch signal line electrically connected to the first touch electrode closer to the first portion includes a smaller number of second compensation portions than the first touch signal line electrically connected to the first touch electrode farther from the first portion.

[0057] The orthographic projection of the second compensation portion on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate.

[0058] In some embodiments, the second compensation portions in different first touch signal lines have the same width perpendicular to the extension direction.

[0059] In some embodiments, among the two first touch signal lines of the first touch signal line group, the width of the second compensation portion included in the first touch signal line electrically connected to the first touch electrode closer to the first part is smaller than the width of the second compensation portion included in the first touch signal line electrically connected to the first touch electrode farther away from the first part.

[0060] In some embodiments, the second touch signal lines are electrically connected to the second touch electrodes in a one-to-one correspondence, and the second touch signal lines only include the first portion.

[0061] In some embodiments, the plurality of second touch signal lines include: a plurality of first-type second touch signal lines and a plurality of second-type second touch signal lines;

[0062] The first type of second touch signal lines only include the first portion, and the first type of second touch signal lines are electrically connected to the second touch electrodes in a one-to-one correspondence;

[0063] The second type of second touch signal line includes a first part and a second part. The second type of second touch signal line is electrically connected to the second touch electrodes in a one-to-one correspondence, and the second part of the second type of second touch signal line is electrically connected to the second sub-electrode farthest from the first part in the second touch electrode.

[0064] In some embodiments, the plurality of first touch signal lines are divided into two first touch signal line groups, and the plurality of second touch signal lines of the second type are located between the two first touch signal line groups.

[0065] In some embodiments, the second portion of the second touch signal line of the second type includes: a third sub-portion extending along the first direction and electrically connected to the first portion;

[0066] The second portion of at least part of the second touch signal line of the second type further includes: a fourth sub-portion extending along the second direction and electrically connected to the third sub-portion and the second touch electrode;

[0067] The orthographic projection of the fourth sub-portion on the substrate overlaps with the orthographic projections of the second sub-electrode and the first sub-electrode on the substrate;

[0068] The orthographic projection of the third sub-portion on the substrate overlaps with the orthographic projections of the second sub-electrode and the bridge electrode on the substrate, and the orthographic projection of the third sub-portion on the substrate does not overlap with the orthographic projection of the second touch electrode on the substrate.

[0069] In some embodiments, the total area S3 of the overlapping region of the orthographic projection of the second portion of the second-type second touch signal line on the substrate and the orthographic projection of the first touch electrode on the substrate, and the area S4 of the orthographic projection of the second portion of the second-type second touch signal line on the substrate satisfy: S3 / S4≤10%; and / or,

[0070] A length L3 in the first direction of an overlapping area between an orthographic projection of the second portion of the second-type second touch signal line on the substrate and an orthographic projection of the first touch electrode on the substrate, and a length L4 of an orthographic projection of the second portion of the second-type second touch signal line on the substrate satisfy the following: L3 / L4≤10%.

[0071] In some embodiments, the second portion of at least some of the second touch signal lines of the second type includes a third width region and a fourth width region;

[0072] The third width area and the fourth width area are arranged alternately;

[0073] The orthographic projection of the third width region on the substrate overlaps with the orthographic projection of the first sub-electrode on the substrate, and the orthographic projection of the third width region on the substrate does not overlap with the orthographic projection of the second sub-electrode on the substrate, and the orthographic projection of the fourth width region on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate;

[0074] The width of the third width region in the direction perpendicular to the extension direction is greater than the width of the fourth width region in the direction perpendicular to the extension direction;

[0075] In the touch area, the pattern of the orthographic projection of the touch signal line on the base substrate includes a plurality of grids; the number of grids included in the fourth width area in the direction perpendicular to the extension direction is less than the number of grids included in the third width area in the direction perpendicular to the extension direction; or,

[0076] The orthographic projection pattern of the third width region on the base substrate includes a plurality of grids; the orthographic projection pattern of the fourth width region on the base substrate is linear.

[0077] In some embodiments, the third touch conductive layer further includes: a first shielding signal line located between the second portion of the first touch signal line and the second portion of the second type second touch signal line;

[0078] The first shielding signal line includes: a third portion extending from the touch area to the peripheral area along the first direction, and a fourth portion extending along the second direction and electrically connected to the third portion;

[0079] In the second direction, the third portion is located between the first subportion and the third subportion; in the first direction, the fourth portion is located between the second subportion and the fourth subportion.

[0080] In some embodiments, the third touch conductive layer further includes: a plurality of second dummy electrodes;

[0081] The second dummy electrode and the second portion are spaced apart and insulated from each other.

[0082] In some embodiments, the third touch conductive layer is located between the base substrate and the first touch conductive layer, and the first touch conductive layer further includes: a plurality of first connecting electrodes; the first connecting electrodes are electrically connected to the second portion;

[0083] The orthographic projection of the first connecting electrode on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate, and the orthographic projection of the first connecting electrode on the base substrate does not overlap with the orthographic projection of the second sub-electrode on the base substrate; or,

[0084] The orthographic projection of part of the first connecting electrode on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate; the orthographic projection of part of the first connecting electrode on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate and the orthographic projection of the second sub-electrode on the base substrate.

[0085] In some embodiments, the first touch conductive layer further includes: a third dummy electrode located between the first connecting electrode and the bridging electrode.

[0086] In some embodiments, the third touch conductive layer further includes: a plurality of second connection electrodes and a plurality of third connection electrodes;

[0087] The second connecting electrode is electrically connected to the first touch electrode, and the third connecting electrode is electrically connected to the second touch electrode.

[0088] In some embodiments, the touch display panel further includes: a multi-layer touch insulating layer; at least a portion of the touch insulating layer is located between two adjacent touch conductive layers;

[0089] The third touch conductive layer is located on a side of the second touch conductive layer away from the base substrate. The thickness of the touch insulating layer between the third touch conductive layer and the second touch conductive layer is greater than the thickness of the touch insulating layer between the first touch conductive layer and the second touch conductive layer.

[0090] In some embodiments, the first portion includes a plurality of sub-signal lines arranged in a stacked manner;

[0091] The multi-layer sub-signal line includes a first sub-signal line, a second sub-signal line, and a third sub-signal line sequentially arranged on one side of the base substrate; the first sub-signal line, the second sub-signal line, and the third sub-signal line are respectively located in three touch conductive layers.

[0092] In some embodiments, at least part of the first portion includes a fifth subportion extending along the second direction, and a sixth subportion extending along the first direction;

[0093] The touch display panel further includes: a first touch insulating layer located between the first sub-signal line and the second sub-signal line, and a second touch insulating layer located between the second sub-signal line and the third sub-signal line;

[0094] At least a portion of the sixth sub-portion includes a first sub-signal line, a second sub-signal line, and a third sub-signal line, and in the sixth sub-portion, the second sub-signal line is electrically connected to the first sub-signal line through a first via hole penetrating the first touch insulating layer, and the third sub-signal line is electrically connected to the second sub-signal line through a second via hole penetrating the second touch insulating layer;

[0095] The orthographic projection of the first via hole on the base substrate and the orthographic projection of the second via hole on the base substrate do not overlap with each other.

[0096] In some embodiments, the fifth sub-portion includes one of a first sub-signal line, a second sub-signal line, and a third sub-signal line;

[0097] The orthographic projections of the fifth sub-portions located in different layers on the substrate overlap.

[0098] In some embodiments, the touch display panel further includes: a retaining wall located in the peripheral area;

[0099] The orthographic projection of the first part on the substrate overlaps with the orthographic projection of the retaining wall on the substrate, and in the area where the orthographic projection of the first part on the substrate overlaps with the orthographic projection of the retaining wall on the substrate, the first part includes 1 or 2 layers of sub-signal lines.

[0100] In some embodiments, the peripheral area includes a first peripheral area located on one side of the touch area in the first direction, and the first portion is located in the first peripheral area;

[0101] The first peripheral region includes a bending region extending along the second direction;

[0102] The orthographic projection of the first portion on the base substrate overlaps with the bending region, and in the bending region, the first portion includes only one layer of sub-signal lines;

[0103] The multi-layer sub-signal line further includes: a fourth sub-signal line located between the first sub-signal line and the base substrate;

[0104] The orthographic projection of the fourth sub-signal line on the base substrate passes through the bending region, and the orthographic projections of the first sub-signal line, the second sub-signal line, and the third sub-signal line on the base substrate do not overlap with the bending region;

[0105] In an area outside the bending region, the fourth sub-signal line is electrically connected to one of the first sub-signal line, the second sub-signal line, and the third sub-signal line.

[0106] In some embodiments, the touch display panel includes: a plurality of light emitting units located in the touch area; the plurality of light emitting units are located between the base substrate and the touch conductive layer;

[0107] In the touch area, the pattern of the orthographic projection of the first touch conductive layer, the second touch conductive layer, and the third touch conductive layer on the base substrate includes multiple grids; each grid corresponds to at least one light-emitting unit, and the orthographic projection of the light-emitting area of ​​the light-emitting unit on the base substrate falls within the orthographic projection of the grid on the base substrate.

[0108] In some embodiments, the touch display panel further includes a plurality of light extraction structures; the light extraction structure includes a first substructure and a second substructure located on a side of the first substructure facing away from the base substrate;

[0109] The first substructure includes an opening, wherein an orthographic projection of the opening on the base substrate covers an orthographic projection of the light-emitting area on the base substrate, and the first substructure includes an inclined side surface at the opening, and the second substructure covers the opening and the inclined side surface, and the refractive index of the first substructure is less than the refractive index of the second substructure;

[0110] The touch display panel further includes: a multi-layer touch insulating layer; in the multi-layer touch insulating layer, a portion of the touch insulating layer is located between adjacent touch conductive layers; a portion of the touch insulating layer is located on a side of the touch conductive layer farthest from the base substrate that faces away from the base substrate, and / or a portion of the touch insulating layer is located between the base substrate and the touch conductive layer closest to the base substrate;

[0111] At least one touch insulation layer in the multi-layer touch insulation layer includes a first substructure, and another touch insulation layer located on a side of the touch insulation layer facing away from the base substrate and adjacent to the touch insulation layer includes a second substructure.

[0112] In some embodiments, the multi-layer touch insulation layer includes: a first touch insulation layer, a second touch insulation layer, a third touch insulation layer, and a fourth touch insulation layer;

[0113] The third touch insulating layer is located on a side of the touch conductive layer that is farthest from the base substrate and faces away from the base substrate, and the fourth touch insulating layer is located on a side of the third touch insulating layer that faces away from the base substrate;

[0114] The first touch insulating layer includes a plurality of first openings located in the touch area, wherein the orthographic projections of the first openings on the base substrate cover the orthographic projections of the light-emitting area on the base substrate, and the orthographic projections of the first openings on the base substrate do not overlap with the orthographic projections of the touch signal lines and the touch electrodes on the base substrate;

[0115] In the first opening, the first touch insulating layer has a first inclined side surface, and the second touch insulating layer covers the first inclined side surface and the first opening;

[0116] The refractive index of the second touch insulating layer is greater than the refractive index of the first touch insulating layer;

[0117] The third touch insulating layer includes a plurality of second openings located in the touch area, wherein the orthographic projections of the second openings on the base substrate cover the orthographic projections of the light-emitting area on the base substrate, and the orthographic projections of the second openings on the base substrate do not overlap with the orthographic projections of the touch signal lines and the touch electrodes on the base substrate;

[0118] In the second opening, the third touch insulating layer has a second inclined side surface, and the fourth touch insulating layer covers the second inclined side surface and the second opening;

[0119] The refractive index of the fourth touch insulating layer is greater than the refractive index of the third touch insulating layer.

[0120] In some embodiments, the touch display panel further includes: a plurality of antenna electrodes located in the touch area, and an antenna signal line electrically connected to the plurality of antenna electrodes;

[0121] The antenna electrode is located at an edge of the touch area away from the first portion;

[0122] The antenna signal line includes: a fifth portion located in the peripheral area, and a sixth portion located in the touch area;

[0123] The sixth portion overlaps an orthographic projection of the base substrate and an edge of the touch area;

[0124] The antenna electrode and the antenna signal line are located in the third touch conductive layer;

[0125] The antenna electrode is located on the second touch conductive layer, and the antenna signal line is located on the third touch conductive layer;

[0126] The second touch conductive layer further includes: a fourth dummy electrode located between the touch electrode and the antenna electrode.

[0127] In some embodiments, the touch display panel further includes: a plurality of pressure sensors located in the touch area, and a plurality of pressure-sensing signal lines;

[0128] The pressure sensor includes: a first electrode, a second electrode located in a different layer from the first electrode, and a pressure-sensitive layer located between the first electrode and the second electrode;

[0129] The pressure-sensing signal line includes: a first pressure-sensing signal line electrically connected to the first electrode, and a second pressure-sensing signal line electrically connected to the second electrode;

[0130] At least two layers among the first touch conductive layer, the second touch conductive layer, and the third touch conductive layer include a first electrode, a second electrode, and a pressure-sensing signal line.

[0131] In some embodiments, the touch display panel further includes: a multi-layer touch insulating layer; at least a portion of the touch insulating layer is located between two adjacent touch conductive layers;

[0132] In the touch area, the first pressure-sensing signal line is located in the first touch conductive layer, the first electrode is located in the second touch conductive layer, and the second electrode and the second pressure-sensing signal line are located in the third touch conductive layer; the touch insulating layer between the second touch conductive layer and the third touch conductive layer includes a pressure-sensing layer; or

[0133] In the touch area, the first pressure-sensing signal line and the first electrode are located in the first touch conductive layer, the second electrode is located in the second touch conductive layer, and the second pressure-sensing signal line is located in the third touch conductive layer; the touch insulating layer between the second touch conductive layer and the first touch conductive layer includes a pressure-sensing layer; or,

[0134] In the touch area, the first pressure-sensing signal line and the first electrode are located in the first touch conductive layer, and the second electrode and the second pressure-sensing signal line are located in the third touch conductive layer. The touch insulating layer between the third touch conductive layer and the first touch conductive layer includes a pressure-sensing layer.

[0135] In some embodiments, the center of the orthographic projection of at least part of the first electrode and at least part of the second electrode on the substrate coincides with the center of the orthographic projection of the first sub-electrode or the second sub-electrode on the substrate; or,

[0136] The orthographic projections of the first electrode and the second electrode on the base substrate are located in a region between adjacent touch electrodes within the orthographic projections of the base substrate.

[0137] A display device provided by an embodiment of the present disclosure includes the touch display panel provided by an embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0138] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0139] FIG1 is a schematic structural diagram of a touch display panel provided by the related art;

[0140] FIG2 is a schematic structural diagram of a touch display panel provided by an embodiment of the present disclosure;

[0141] FIG3 is a cross-sectional view along line AA′ in FIG2 provided by an embodiment of the present disclosure;

[0142] FIG4 is another cross-sectional view along line AA′ in FIG2 provided by an embodiment of the present disclosure;

[0143] FIG5 is a schematic diagram of an enlarged structure of the E region in FIG2 provided by an embodiment of the present disclosure;

[0144] FIG6 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0145] FIG7 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0146] FIG8 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0147] FIG9 is a schematic diagram of an enlarged structure of area C in FIG2 provided by an embodiment of the present disclosure;

[0148] FIG10 is another schematic diagram of an enlarged structure of area C in FIG2 provided by an embodiment of the present disclosure;

[0149] FIG11 is a cross-sectional view along line FF′ in FIG2 provided by an embodiment of the present disclosure;

[0150] FIG12 is a cross-sectional view along line HH′ in FIG2 provided by an embodiment of the present disclosure;

[0151] FIG13 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0152] FIG14 is a schematic diagram of an enlarged structure of the J region in FIG13 provided by an embodiment of the present disclosure;

[0153] FIG15 is another schematic diagram of an enlarged structure of the J region in FIG13 provided by an embodiment of the present disclosure;

[0154] FIG16 is a cross-sectional view along line BB′ in FIG2 provided by an embodiment of the present disclosure;

[0155] FIG17 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0156] FIG18 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0157] FIG19 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0158] FIG20 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0159] FIG21 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0160] FIG22 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0161] FIG23 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0162] FIG24 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0163] FIG25 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0164] FIG26 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0165] FIG27 is a cross-sectional view along line KK' in FIG26 provided by an embodiment of the present disclosure;

[0166] FIG28 is another cross-sectional view along line KK' in FIG26 provided by an embodiment of the present disclosure;

[0167] FIG29 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0168] FIG30 is a cross-sectional view along line MM′ in FIG29 provided by an embodiment of the present disclosure;

[0169] FIG31 is a schematic diagram of an enlarged structure of the N region in FIG29 provided by an embodiment of the present disclosure;

[0170] FIG32 is a cross-sectional view along line PP′ in FIG31 provided by an embodiment of the present disclosure;

[0171] FIG33 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0172] FIG34 is a schematic diagram of an enlarged structure of the O area in FIG29 provided by an embodiment of the present disclosure;

[0173] FIG35 is a cross-sectional view along line RR′ in FIG31 provided by an embodiment of the present disclosure;

[0174] FIG36 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0175] FIG37 is a schematic diagram of an enlarged structure of the T region in FIG36 provided by an embodiment of the present disclosure;

[0176] FIG38 is a cross-sectional view along line UU′ in FIG37 provided by an embodiment of the present disclosure;

[0177] FIG39 is another cross-sectional view along line UU′ in FIG37 provided by an embodiment of the present disclosure;

[0178] FIG40 is another cross-sectional view along line UU′ in FIG37 provided by an embodiment of the present disclosure;

[0179] FIG41 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0180] FIG42 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0181] FIG43 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0182] FIG44 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0183] FIG45 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0184] FIG46 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0185] FIG47 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0186] FIG48 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0187] FIG49 is a cross-sectional view along line QQ′ in FIG48 provided in an embodiment of the present disclosure;

[0188] FIG50 is another cross-sectional view along line QQ′ in FIG48 provided by an embodiment of the present disclosure;

[0189] FIG51 is another cross-sectional view along line QQ′ in FIG48 provided by an embodiment of the present disclosure;

[0190] FIG52 is another cross-sectional view along line QQ′ in FIG48 provided in an embodiment of the present disclosure;

[0191] FIG53 is another cross-sectional view along line QQ′ in FIG48 provided in an embodiment of the present disclosure;

[0192] FIG54 is another cross-sectional view along line QQ′ in FIG48 provided in an embodiment of the present disclosure;

[0193] FIG55 is a schematic structural diagram of another touch display panel provided by an embodiment of the present disclosure;

[0194] FIG56 is a cross-sectional view along line ZZ' in FIG55 provided by an embodiment of the present disclosure;

[0195] FIG57 is another cross-sectional view along line ZZ' in FIG55 provided by an embodiment of the present disclosure;

[0196] FIG58 is another cross-sectional view along line ZZ′ in FIG55 provided by an embodiment of the present disclosure;

[0197] FIG59 is another cross-sectional view along ZZ′ in FIG55 provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0198] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0199] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0200] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0201] In the related art, as shown in FIG1 , touch electrodes 2 are located in a touch area 101. Touch signal lines 3 electrically connected to touch electrodes 2 extending along a second direction X extend from a peripheral area 102 on the right side to a peripheral area 102 below the touch area 101. Touch signal lines 3 electrically connected to touch electrodes 2 extending along a first direction Y extend from a peripheral area 102 above the touch area 101, pass through a peripheral area 102 on the left side of the touch area 101, and extend to a peripheral area 102 below the touch area 101. Thus, touch signal lines 3 are required in the peripheral areas above, on both sides, and on both sides of the touch area 101. Even if the line width and spacing of the touch signal lines are reduced to reduce the area occupied by the touch signal lines, the impact of the touch signal lines on the size of the peripheral areas cannot be completely eliminated, and the narrow bezel effect that can be achieved is limited.

[0202] An embodiment of the present disclosure provides a touch display panel, as shown in FIG2 , the touch display panel includes:

[0203] The base substrate 1 includes a touch area 101 and a peripheral area 102 surrounding the touch area 101;

[0204] A plurality of touch electrodes 2 are located on one side of the base substrate 1 in the touch area 101;

[0205] Multiple touch signal lines 3 are located on the same side of the base substrate 1 as the touch electrode 2; the touch signal lines 3 are electrically connected to the touch electrode 2; the touch signal lines 3 include a first portion 3-1 located on one side of the touch area 101 in the first direction Y; at least part of the touch signal lines 3 also includes: a second portion 3-2 located in the touch area 101 and electrically connected to the first portion 3-1, and the second portion 3-2 and the touch electrode 2 are located in different film layers.

[0206] The touch display panel provided by the disclosed embodiments disposes a second portion of the touch signal lines, outside the first portion, in the touch area. This eliminates the need for the second portion to be located in the peripheral area, thereby reducing the size of at least a portion of the peripheral area and achieving an extremely narrow bezel. Furthermore, because the second portion disposed in the touch area and the touch electrodes are located on a different film layer, interference with the touch electrodes by the second portion can be reduced, thereby preventing a decrease in touch accuracy.

[0207] In some embodiments, as shown in FIG2 , the peripheral area 102 includes: a first peripheral area 1021 and a second peripheral area 1022 located on both sides of the touch area 101 in the first direction Y, and a third peripheral area 1023 and a fourth peripheral area 1024 located on both sides of the touch area 101 in the second direction X; in FIG2 , the first portion 3-1 is located in the first peripheral area 1021, and the second direction X intersects the first direction Y; in FIG2 , the second direction X is perpendicular to the first direction Y.

[0208] In a specific implementation, as shown in FIG2 , the first peripheral area 1021 includes a binding area 12 , which includes a plurality of binding electrodes. The binding electrodes are bound to the driver chip, and the first portion of the touch signal line is electrically connected to the binding electrodes, so that the touch signal can be transmitted through the touch signal line.

[0209] In some embodiments, as shown in FIG2 , the orthographic projection of the touch signal line 3 on the base substrate 1 does not overlap with the peripheral areas 102 on both sides of the touch area 101 in the second direction X, that is, the orthographic projection of the touch signal line 3 on the base substrate 1 does not overlap with the fourth peripheral area 1024 and the third peripheral area 1023; and the orthographic projection of the touch signal line 3 on the base substrate 1 does not overlap with the second peripheral area 1022.

[0210] In the touch display panel provided by the embodiment of the present disclosure, the orthographic projection of the touch signal line on the base substrate does not overlap with the fourth peripheral area, the second peripheral area, and the third peripheral area outside the first peripheral area. This can completely eliminate the influence of the touch signal line on the sizes of the fourth peripheral area, the second peripheral area, and the third peripheral area, reduce the sizes of the fourth peripheral area, the second peripheral area, and the third peripheral area, and achieve an extremely narrow bezel effect.

[0211] In some embodiments, as shown in FIG3 and FIG4 , the touch display panel includes: a multi-layer touch conductive layer 4 including:

[0212] A first touch conductive layer 401; the first touch conductive layer 401 includes a portion of the plurality of touch electrodes 2;

[0213] The second touch conductive layer 402 is located on a side of the first touch conductive layer 401 facing away from the base substrate 1 ; the second touch conductive layer 402 includes the remaining parts of the plurality of touch electrodes 2 ;

[0214] The third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 , or located on a side of the second touch conductive layer 402 facing away from the base substrate 1 ; the third touch conductive layer 403 includes a first portion 3 - 1 .

[0215] It should be noted that Figure 3 is a cross-sectional view along AA' in Figure 2, in which the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1; Figure 4 is another cross-sectional view along AA' in Figure 2, in which the third touch conductive layer 403 is located on the side of the second touch conductive layer 402 away from the base substrate 1.

[0216] In some embodiments, as shown in FIG3 and FIG4 , the touch display panel further includes: a multi-layer touch insulating layer 7 ; at least a portion of the touch insulating layer 7 is located between two adjacent touch conductive layers 4 ;

[0217] The multi-layer touch insulation layer 7 includes: a first touch insulation layer 701, and a second touch insulation layer 702 located on the side of the first touch insulation layer 701 facing away from the base substrate 1; in Figure 3, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the third touch conductive layer 403, and the second touch insulation layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402; in Figure 4, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the second touch conductive layer 402, and the second touch insulation layer 702 is located between the third touch conductive layer 403 and the second touch conductive layer 402.

[0218] In some embodiments, as shown in FIG. 2 to FIG. 4 , the plurality of touch electrodes 2 include:

[0219] A plurality of first touch electrodes 201 extending along the second direction X and arranged along the first direction Y; the first touch electrodes 201 include a plurality of first sub-electrodes 2011 arranged along the second direction X;

[0220] A plurality of second touch electrodes 202 are arranged along the second direction X and extend along the first direction Y. The second touch electrodes 202 include: a plurality of second sub-electrodes 2021 arranged along the first direction Y, and a bridging electrode 2022 electrically connecting two adjacent second sub-electrodes 2021;

[0221] The first touch conductive layer 401 includes a bridging electrode 2022 , and the second touch conductive layer 402 includes a first sub-electrode 2011 and a second sub-electrode 2021 .

[0222] In some embodiments, as shown in Figures 3 and 4, the second sub-electrode 2021 is electrically connected to the bridging electrode 2022 through a third via 24 that penetrates the touch insulation layer 7; in Figure 3, the third via 24 is a via that penetrates the second touch insulation layer 702; in Figure 4, the third via 24 is a via that penetrates the first touch insulation layer 701.

[0223] In some embodiments, as shown in FIG. 2 to FIG. 4 , the plurality of touch signal lines 3 include:

[0224] A plurality of first touch signal lines 301 ; the first touch electrodes 201 are electrically connected to at least one first touch signal line; a plurality of second touch signal lines 302 ; the second touch electrodes 202 are electrically connected to at least one second touch signal line 302 .

[0225] In the touch display panel provided by the embodiment of the present disclosure as shown in Figure 3, the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1, so that the distance between the second part of the touch signal line located in the touch area and the first sub-electrode and the second sub-electrode can be larger, thereby avoiding electrical interference between the second part of the first touch signal line and the second sub-electrode, or avoiding electrical interference between the second part of the second touch signal line and the first sub-electrode, thereby avoiding affecting the touch accuracy.

[0226] In some embodiments, as shown in FIG4 , when the third touch conductive layer 403 is located on the side of the second touch conductive layer 402 facing away from the base substrate 1, the thickness of the touch insulating layer 7 between the third touch conductive layer 403 and the second touch conductive layer 402 is greater than the thickness of the touch insulating layer 7 between the first touch conductive layer 401 and the second touch conductive layer 402. In other words, by increasing the thickness of the touch insulating layer 7 between the first touch conductive layer 401 and the second touch conductive layer 402, the distance between the second portion of the touch signal line in the touch area and the first sub-electrode and the second sub-electrode is increased, thereby preventing electrical interference between the second portion of the first touch signal line and the second sub-electrode, or between the second portion of the second touch signal line and the first sub-electrode, thereby preventing a decrease in touch accuracy.

[0227] In some embodiments, as shown in FIG5 , the touch electrodes 2 and touch signal lines (not shown) located in the touch area 101 both include a metal grid structure 14 , that is, the pattern of the orthographic projection of the touch electrodes 2 and touch signal lines 3 located in the touch area 101 on the substrate 1 includes a grid 1401 .

[0228] It should be noted that FIG5 is an enlarged schematic diagram of the E area in FIG2 .

[0229] In a specific implementation, as shown in FIG5 , the metal mesh structure 14 is formed by interweaving a plurality of metal wires 1402 so that the metal mesh structure 14 includes a plurality of meshes 1401, and the mesh 1401 is a polygon formed by a plurality of metal wires, or in other words, the metal mesh 1401 is formed by repeatedly and continuously setting and splicing the meshes 1401. As shown in FIG5 , the shape of the mesh 1401 surrounded by the metal wires 1402 can be a rhombus. Alternatively, the shape of the mesh surrounded by the metal wires can be a triangle, a rectangle, a hexagon, etc., or the shape of the mesh surrounded by the metal wires can be a combination of multiple shapes, such as a combination of a pentagon and a hexagon, or the shape of the mesh surrounded by the metal wires can include any one or more of a triangle, a square, a rectangle, a rhombus, a trapezoid, a pentagon, and a hexagon. In a specific implementation, the mesh pattern surrounded by the metal wires can be a regular shape or an irregular shape, and the edges of the mesh can be straight lines or curves, which are not limited in the embodiments of the present disclosure. The edge of the metal mesh structure can also include an incomplete mesh pattern.

[0230] In a specific implementation, as shown in Figure 5, multiple incisions 1403 can be set on the grid 1401. For the parts located in the same layer of the touch conductive layer 4 and need to be insulated from each other, for example, when the grid 1401 of the first sub-electrode 2011 and the grid 1401 of the second sub-electrode 2021 are located in the same layer, the incisions 1403 are set in the grid 1401 pattern set on the entire surface to achieve isolation of the grid 1401 of the first sub-electrode 2011 and the grid 1401 of the second sub-electrode 2021.

[0231] The touch electrodes and touch signal lines provided in the embodiments of the present disclosure include a metal mesh structure. The first touch electrodes, second touch electrodes, and touch signal lines in the metal mesh structure have advantages such as low resistance, small thickness, and fast response speed, thereby improving the sensitivity and accuracy of touch recognition.

[0232] In a specific implementation, the grids in the first touch conductive layer, the grids 1401 in the second touch conductive layer, and the grids in the third touch conductive layer have the same shape, size, and metal line width, and the orthographic projections of the grids in the first touch conductive layer, the grids in the second touch conductive layer, and the grids in the third touch conductive layer on the base substrate have roughly overlapping areas.

[0233] In some embodiments, as shown in FIG6 , the touch display panel further includes:

[0234] The display layer 5 is located between the base substrate 1 and the touch conductive layer 4;

[0235] The encapsulation layer 8 is located between the display layer 5 and the touch conductive layer 4 .

[0236] In a specific implementation, the touch area 101 of the touch display panel is also its display area.

[0237] In a specific implementation, as shown in FIG. 3 and FIG. 4 , the touch electrodes 2 and the touch signal lines 3 are disposed on the packaging layer 8 .

[0238] Alternatively, in a specific implementation, as shown in FIG6 , the touch display panel further includes: a first buffer layer 6 located between the encapsulation layer 8 and the touch conductive layer 4 .

[0239] In some embodiments, the display layer includes a plurality of sub-pixels.

[0240] In some embodiments, as shown in FIG6 , a sub-pixel includes a pixel driving circuit 501 located on a substrate 1 and a light-emitting unit 502 electrically connected to the pixel driving circuit 501. The light-emitting unit 502 includes an electroluminescent device, which may be, for example, an organic light-emitting diode device or a quantum dot light-emitting diode device.

[0241] In some embodiments, as shown in Figure 6, the pixel driving circuit 501 includes a thin film transistor 5011 and a capacitor 5012; the thin film transistor 5011 includes: an active layer 50111, a gate G, a source S and a drain D; the capacitor 5012 includes: a first capacitor electrode 50121, and a second capacitor electrode 50122 located on the side of the first capacitor electrode 50121 away from the base substrate 1, and the first capacitor electrode 50121 and the gate G are arranged in the same layer; in a specific implementation, in Figure 6, the thin film transistor TFT has a top gate structure, that is, the gate G is located on the side of the active layer away from the base substrate 1. In Figure 6 , the source electrode S and drain electrode D are arranged on the same layer. The touch display panel also includes: a second buffer layer 5013 located between the base substrate 1 and the active layer; a first gate insulating layer 5013 located between the active layer and the gate electrode G; a second gate insulating layer 5014 located between the gate electrode G and the second capacitor electrode 50122; a first interlayer insulating layer 5015 located between the second capacitor electrode 50122 and the source electrode S and drain electrode D; a transfer electrode 5016 located on the side of the source electrode S and drain electrode facing away from the base substrate 1; a second interlayer insulating layer 5017 and a first planarization layer 5018 located between the source electrode S and drain electrode D and the transfer electrode 5016; and a second planarization layer 5019 located on the side of the transfer electrode 5016 facing away from the base substrate 1. The transfer electrode 5016 is electrically connected to the drain electrode D. The active layer may be made of, for example, silicon or an oxide semiconductor. The gate, source electrode, drain electrode, capacitor, and transfer electrode may be made of, for example, metal.

[0242] It should be noted that the pixel driving circuit may further include a larger number of thin film transistors and capacitors.

[0243] In some embodiments, as shown in Figure 6, the electroluminescent device includes a stacked anode 5021, a light-emitting functional layer 5022, and a cathode 5023. The touch display panel also includes a pixel definition layer 5024 located on the side of the second planarization layer 5019 facing away from the base substrate 1. The pixel definition layer has a first opening region, which covers the edge of the anode 5021. The anode 5021, the light-emitting functional layer 5022, and the cathode 5023 are stacked in the first opening region to form the electroluminescent device. The transfer electrode 5016 is electrically connected to the anode 5021 of the electroluminescent device.

[0244] In a specific implementation, the first opening area corresponds to the light-emitting area of ​​the light-emitting device, that is, the light-emitting area of ​​the sub-pixel. The metal grid included in the touch conductive layer corresponds to at least one light-emitting unit. Specifically, as shown in FIG7 , the orthographic projection of the light-emitting area 26 of the light-emitting unit on the substrate falls within the orthographic projection of the grid 1401 on the substrate. This prevents the touch electrode and touch signal line from obstructing the light-emitting area of ​​the sub-pixel.

[0245] In some embodiments, as shown in FIG6 , the encapsulation layer 8 includes a stacked arrangement of an inorganic encapsulation layer 8 / an organic encapsulation layer 8 / an inorganic encapsulation layer 8 .

[0246] In some embodiments, the source and drain of the thin-film transistor can be located on different layers, thereby saving wiring space and preventing short circuits even when the distance between the source and drain is reduced. For example, the drain can be located on the side of the source facing away from the substrate, with a third interlayer insulating layer disposed between the source and drain.

[0247] In some embodiments, as shown in FIG. 2 , the first touch signal line 301 includes a second portion 3 - 2 .

[0248] It should be noted that the second touch electrode extends along the first direction Y. When the second touch electrode needs to be connected to the driver chip through the second touch signal line, the second touch signal line can be directly led out from the edge of the second touch electrode close to the first peripheral area, that is, the second touch electrode can be electrically connected to the driver chip without passing through the remaining peripheral areas outside the first peripheral area. However, since the first touch electrode extends along the second direction X and is arranged along the first direction Y, the first touch electrode cannot be electrically connected to the driver chip only by being arranged in the first part of the peripheral area. In the touch display panel provided by the embodiment of the present disclosure, the first touch signal line includes a second part located in the touch area, thereby reducing the size of the peripheral area while achieving the electrical connection between the first touch electrode and the driver chip through the first touch signal line.

[0249] In some embodiments, as shown in FIG2 , the second portion 3 - 2 of the first touch signal line 301 includes: a first sub-portion 3011 extending along the first direction Y and electrically connected to the first portion 3 - 1 ;

[0250] The second portion 3 - 2 of at least part of the first touch signal line 301 further includes a second sub-portion 3012 extending along the second direction X and electrically connected to the first sub-portion 3011 and the touch electrode 2 .

[0251] It should be noted that in Figure 2, the second part 3-2 of the first touch signal line 301 electrically connected to the first touch electrode 201 closest to the first peripheral area 1021 includes the first sub-part 3011 but not the second sub-part 3012, and the second parts 3-2 of the remaining first touch signal lines 301 all include the first sub-part 3011 and the second sub-part 3012.

[0252] Of course, in a specific implementation, the second portion of each first touch signal line may also include a first sub-portion and a second sub-portion.

[0253] Alternatively, in some embodiments, as shown in FIG8 , the second portion 3 - 2 of the first touch signal line 301 includes only a first sub-portion 3011 extending along the first direction Y and electrically connected to the first portion 3 - 1. This can reduce the overlapping area between the second portion of the first touch signal line and the second touch electrode, thereby reducing electrical interference between the two.

[0254] In some embodiments, as shown in Figure 2, the orthographic projection of the second sub-portion 3012 on the base substrate 1 overlaps with the orthographic projections of the first touch electrode 201 and the bridging electrode 2022 on the base substrate 1, and the orthographic projection of the second sub-portion 3012 on the base substrate 1 does not overlap with the orthographic projection of the second sub-electrode 2021 on the base substrate 1.

[0255] In the touch display panel provided by the embodiment of the present disclosure, the size of the bridging electrode is smaller than that of the second sub-electrode, and the orthographic projection of the second sub-portion on the base substrate overlaps with the orthographic projection of the bridging electrode on the base substrate but does not overlap with the orthographic projection of the second sub-electrode on the base substrate. This can minimize the overlapping area between the second sub-portion and the second touch electrode, thereby reducing the electrical interference between the second sub-portion and the second touch electrode and improving touch accuracy.

[0256] In some embodiments, as shown in FIG9 , the orthographic projection of the first sub-portion 3011 on the base substrate 1 overlaps with the orthographic projection of the first sub-electrode 2011 on the base substrate 1 , and the orthographic projection of the first sub-portion 3011 on the base substrate 1 does not overlap with the orthographic projection of the second touch electrode 202 on the base substrate 1 .

[0257] It should be noted that FIG9 is an enlarged schematic diagram of area C in FIG2 .

[0258] In the touch display panel provided by the embodiment of the present disclosure, the first sub-portion and the second touch electrode do not overlap with each other, which can reduce the overlapping area of ​​the first sub-portion and the second touch electrode, thereby reducing the electrical interference between the first sub-portion and the second touch electrode, and improving touch accuracy.

[0259] In some embodiments, as shown in FIG. 9 , the orthographic projection of the first sub-portion 3011 on the base substrate 1 falls into a region between the orthographic projections of two adjacent second touch electrodes 202 on the base substrate 1 .

[0260] Alternatively, in some embodiments, as shown in FIG10 , the orthographic projection of the first sub-portion 3011 on the substrate 1 overlaps with the orthographic projection of the first sub-electrode 2011 on the substrate 1 ;

[0261] At least a portion of the orthographic projection of the first sub-portion 3011 on the base substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the base substrate 1 .

[0262] In the touch display panel provided by the embodiment of the present disclosure, when the distance between two adjacent second touch electrodes is small, at least a portion of the orthographic projection of the first sub-portion on the base substrate overlaps with the orthographic projection of the second sub-electrode on the base substrate, thereby reducing wiring difficulty.

[0263] It should be noted that FIG10 is another enlarged schematic diagram of the C area in FIG2 .

[0264] In a specific implementation, as shown in Figure 10, the orthographic projection of a portion of the first sub-portion 3011 on the base substrate 1 falls into the area between the orthographic projections of two adjacent second touch electrodes 202 on the base substrate 1, and the orthographic projection of a portion of the first sub-portion 3011 on the base substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the base substrate 1.

[0265] In some embodiments, the total area S1 of the overlapping region of the orthographic projection of the first sub-portion on the substrate and the orthographic projection of the second sub-electrode on the substrate, and the area S2 of the orthographic projection of the first touch signal line on the substrate satisfy: S1 / S2≤10%;

[0266] And / or, the length L1 of the overlapping area of ​​the orthographic projection of the first sub-portion on the substrate and the orthographic projection of the second sub-electrode on the substrate in the first direction Y and the length L2 of the orthographic projection of the first touch signal line on the substrate satisfy: L1 / L2≤10%.

[0267] The touch display panel provided by the embodiment of the present disclosure, S1 / S2≤10%, and / or L1 / L2≤10%, can achieve that when the orthographic projection of the first sub-portion and the second sub-electrode overlap, the total overlapping area of ​​the two corresponding to each second touch signal line can be minimized, thereby reducing the electrical interference between the first sub-portion and the second touch electrode, and improving touch accuracy.

[0268] In some embodiments, as shown in Figures 2, 8, 9, and 10, the orthographic projections of at least some first sub-portions 3011 on the substrate 1 overlap with the orthographic projections of the same first sub-electrodes 2011 on the substrate 1. That is, at least some first sub-portions 3011 correspond to the same column of first sub-electrodes 2011. This saves wiring space and reduces wiring difficulty.

[0269] In a specific implementation, as shown in FIG. 2 and FIG. 8 , two adjacent first sub-portions 3011 corresponding to the same column of first sub-electrodes 2011 are electrically connected to two adjacent first touch electrodes 201 , respectively.

[0270] In some embodiments, as shown in FIG. 9 , the orthographic projections of two adjacent first sub-portions 3011 corresponding to the same column of first sub-electrodes 2011 on the base substrate 1 both fall into the area between the orthographic projections of two adjacent second touch electrodes 202 on the base substrate 1 .

[0271] Alternatively, as shown in Figure 10, corresponding to two adjacent first sub-portions 3011 of the same column of first sub-electrodes 2011, the orthographic projection of one first sub-portion 3011 on the substrate 1 falls into the area between the orthographic projections of two adjacent second touch electrodes 202 on the substrate 1, and the orthographic projection of the other first sub-portion 3011 on the substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the substrate 1.

[0272] Alternatively, in a specific implementation, when the distance between two adjacent second touch electrodes is small, it can also be set so that the orthographic projections of the two adjacent first sub-portions 3011 corresponding to the same column of first sub-electrodes 2011 on the base substrate 1 overlap with the orthographic projections of the second sub-electrode 2021 on the base substrate 1.

[0273] In some embodiments, as shown in FIG9 to FIG12 , the second touch conductive layer 402 further includes: a plurality of first dummy electrodes 15 ; the first dummy electrodes 15 are insulated from the touch electrodes 2 ;

[0274] The first dummy electrode 15 is located between the first sub-electrodes 2011 of two adjacent different first touch electrodes 201 , and the first dummy electrode 15 is located between the second sub-electrodes 2021 of two adjacent different second touch electrodes 202 .

[0275] It should be noted that FIG11 is a cross-sectional view along line FF′ in FIG2 , and FIG12 is a cross-sectional view along line HH′ in FIG2 .

[0276] The touch display panel provided by the embodiment of the present disclosure provides a first dummy electrode between the first sub-electrodes of two adjacent touch electrodes and between the second sub-electrodes of two adjacent second touch electrodes, thereby avoiding interference between different touch electrodes.

[0277] In a specific implementation, the orthographic projection of the first dummy electrode on the base substrate is also a grid structure. The first dummy electrode is arranged on the same layer as the first sub-electrode and the second sub-electrode. An incision is set in the grid structure to isolate the first dummy electrode from the first sub-electrode and the second sub-electrode, that is, they are insulated from each other and not electrically connected to each other.

[0278] In some embodiments, as shown in FIG. 9 to FIG. 12 , at least a portion of the orthographic projection of the first sub-portion 3011 on the base substrate 1 overlaps with the orthographic projection of the first dummy electrode 15 on the base substrate 1 .

[0279] In some embodiments, as shown in FIG. 13 , at least a portion of the second portion 3 - 2 of the first touch signal line 301 includes first width regions 27 and second width regions 28 that are alternately arranged.

[0280] The orthographic projection of the first width region 27 on the base substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the base substrate 1 ;

[0281] At least a portion of the orthographic projection of the second width region 28 on the substrate 1 overlaps with the orthographic projection of the bridge electrode 2022 on the substrate 1 ;

[0282] The orthographic projection of at least a portion of the second width region 28 on the substrate 1 falls within the orthographic projection of the region between two adjacent second sub-electrodes 2021 on the substrate 1, or the orthographic projection of at least a portion of the second width region 28 on the substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the substrate 1;

[0283] The width of the first width region 27 in the direction perpendicular to the extending direction thereof is greater than the width of the second width region 28 in the direction perpendicular to the extending direction thereof.

[0284] In the touch display panel provided by the embodiment of the present disclosure, the first width area of ​​the first touch signal line overlaps with the orthographic projection of the first touch electrode but does not overlap with the orthographic projection of the second touch electrode, the second width area overlaps with the second touch electrode or is located between two adjacent different second touch electrodes, and the width of the second width area is smaller than the width of the first width area, which is equivalent to reducing the width of the part that overlaps with the orthographic projection of the second touch electrode or is located between two adjacent different second touch electrodes, further reducing the overlapping area of ​​the first touch signal line and the second touch electrode, avoiding electrical interference between the two, and improving touch accuracy.

[0285] In some embodiments, as shown in Figure 13, in the first sub-portion 3011, the orthographic projection of the first width region 27 on the substrate substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the substrate substrate 1; the orthographic projection of the second width region 28 on the substrate substrate 1 falls within the orthographic projection of the area between two adjacent second sub-electrodes 2021 on the substrate substrate 1, or the orthographic projection of the second width region 28 on the substrate substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the substrate substrate 1.

[0286] In some embodiments, as shown in Figure 13, in the second sub-portion 3012, the orthographic projection of the first width region 27 on the substrate substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the substrate substrate 1, and the orthographic projection of the second width region 28 on the substrate substrate 1 overlaps with the orthographic projection of the bridging electrode 2022 on the substrate substrate 1.

[0287] When the pattern of the touch conductive layer is a grid structure, in some embodiments, as shown in FIG14 , the number of grids 1401 included in the second width region 28 in the direction perpendicular to the extension direction is smaller than the number of grids 1401 included in the first width region 27 in the direction perpendicular to the extension direction. This allows the width of the first width region in the direction perpendicular to the extension direction to be greater than the width of the second width region in the direction perpendicular to the extension direction, thereby reducing the overlapping area between the first touch signal line and the second touch electrode, minimizing electrical interference between the two, and improving touch accuracy.

[0288] It should be noted that FIG14 is an enlarged schematic diagram of the first touch signal line along the J area in FIG13 .

[0289] Alternatively, in some embodiments, as shown in FIG15 , the pattern of the second width region 28 is linear. That is, the pattern of the second width region does not include a complete grid, but rather includes only a single metal line. This allows the width of the first width region perpendicular to its extension direction to be greater than the width of the second width region perpendicular to its extension direction, reducing the overlap area between the first touch signal line and the second touch electrode, minimizing electrical interference between the two, and improving touch accuracy.

[0290] It should be noted that Figure 15 is another enlarged schematic diagram of the first touch signal line along the J region in Figure 13. Figure 5 illustrates an example in which the second width region 28 of the first touch signal line has a straight line pattern. Of course, the pattern of the second width region can also be a zigzag line, where the zigzag line is part of the grid pattern.

[0291] In some embodiments, as shown in FIG. 2 and FIG. 16 , one end of the second sub-portion 3012 away from the first sub-portion 3011 is electrically connected to one end of the first touch electrode 201 .

[0292] It should be noted that FIG16 is a cross-sectional view along line BB′ in FIG2 .

[0293] Alternatively, in some embodiments, as shown in FIG. 8 , one end of the first sub-portion 3011 away from the first portion 3 - 1 is electrically connected to the first touch electrode 201 .

[0294] Specifically, as shown in Figure 16, the first touch electrode 201 is electrically connected to the first touch signal line 301 through a fourth via 10 that penetrates the touch insulating layer 7. In Figure 16, the third touch conductive layer 403 is located below the second touch conductive layer 402, and the fourth via 10 penetrates the first touch insulating layer 701 and the second touch insulating layer 702. When the third touch conductive layer is located on the side of the second touch conductive layer facing away from the base substrate, the fourth via penetrates the second touch insulating layer.

[0295] In some embodiments, as shown in FIG. 2 , FIG. 13 , and FIG. 17 , the plurality of first touch signal lines 301 are divided into n first touch signal line groups 16 ; n is a positive integer;

[0296] The first touch signal lines 301 in the first touch signal line group 16 correspond one-to-one to the first touch electrodes 201 ;

[0297] In each first touch signal line group 16 , the first sub-portions 3011 of the plurality of first touch signal lines 301 are sequentially arranged along the second direction X, and the second sub-portions 3012 of the plurality of first touch signal lines 301 are sequentially arranged along the first direction Y.

[0298] It should be noted that in Figures 2 and 13, n = 1, and in Figure 17, n = 2. When n is greater than 1, it is beneficial to increase the transmission speed of the touch signal. When n = 2, as shown in Figure 17, the two first touch signal line groups 16 are referenced 1601 and 1602, respectively, and the two first touch signal line groups 16 are arranged along the second direction X.

[0299] In some embodiments, as shown in FIG. 2 , FIG. 13 , and FIG. 17 , in the direction from the second sub-portion 3012 to the first sub-portion 3011 , the length of the first sub-portion 3011 in the first touch signal line group 16 in the first direction Y gradually increases;

[0300] In the direction in which the touch area 101 moves away from the first portion 3 - 1 , the length of the second sub-portion 3012 in the first touch signal line group 16 in the second direction X gradually increases.

[0301] In some embodiments, as shown in Figures 2 and 13, n=1, and in the first touch signal line 301 electrically connected to the first touch electrode 201 farthest from the first part 3-1, the orthographic projection of the first sub-part 3011 on the base substrate 1 overlaps with the orthographic projection of the edge of the first touch electrode 201 on the base substrate 1.

[0302] In some embodiments, as shown in FIG17 , n=2; the two first touch signal line groups 16 are arranged sequentially in the second direction X;

[0303] In the two first touch signal line groups 16 , the first sub-portions 3011 of the two first touch signal lines 301 electrically connected to the first touch electrode 201 farthest from the first portion 3 - 1 and located in different first touch signal line groups 16 are closest to each other.

[0304] It should be noted that since the second portion of the first touch signal line is arranged in the touch area and the overlapping area between the first touch signal line and the second touch electrode needs to be minimized, the wiring space of the second portion of the first touch signal line is limited, and the length difference between the second portions of different first touch signal lines is large, which in turn leads to a large difference in resistance between the second portions of different first touch signal lines, and the signal loading of different first touch signal lines is inconsistent, which affects the touch performance.

[0305] In some embodiments, as shown in FIG18 , the first sub-portion 3011 and / or the second sub-portion 3012 of the second portion 3 - 2 includes a first compensation portion 17 ;

[0306] The first compensation portion 17 extends in a broken line.

[0307] In a specific implementation, as shown in FIG18 , except for the second portion 3-2 electrically connected to the first touch electrode 201 farthest from the first portion 3-1, the first sub-portions 3011 and / or the second sub-portions 3012 of the remaining second portions 3-2 include the first compensation portion 17;

[0308] The first compensation portion 17 extends in a broken line.

[0309] In the touch display panel provided by the embodiment of the present disclosure, the second portion of at least some of the first touch signal lines includes a first compensation portion, and the first compensation portion extends in a broken line. Compared with the case of extending in a straight line, the length of the signal line can be increased, thereby achieving the goal of reducing the resistance difference between the second portions of different first touch signal lines by setting the first compensation portion in a limited wiring space, thereby improving the touch performance.

[0310] In some embodiments, as shown in FIG. 18 , the orthographic projection of the first compensation portion 17 on the base substrate 1 is composed of portions 1701 extending along the first direction Y and portions 1702 extending along the second direction X alternately arranged.

[0311] It should be noted that the first compensation portion extends in a zigzag pattern, which can be bent in a certain direction, or in a circular pattern. In practice, the zigzag pattern of the first compensation portion can be specifically configured based on wiring space and touch signal line resistance differences.

[0312] In some embodiments, as shown in FIG18 , among any two first touch signal lines 301 in the first touch signal line group 16, the first touch signal line 301 electrically connected to the first touch electrode 201 closer to the first portion 3-1 includes a greater number of first compensation portions 17 than the first touch signal line 301 electrically connected to the first touch electrode 201 farther from the first portion 3-1. That is, the second portion electrically connected to the first touch electrode closer to the first portion, i.e., the first peripheral region, includes a greater number of first compensation portions.

[0313] It should be noted that the closer the second portion is to the first portion, ie, the first peripheral region, the shorter the length of the second portion electrically connected to the first touch electrode is.

[0314] The touch display panel provided by the embodiment of the present disclosure includes a second part that is electrically connected to the first touch electrode closer to the first part, i.e., the first peripheral area, and includes more first compensation parts, which is more conducive to eliminating the resistance difference between the second parts of different first touch signal lines, and can improve touch performance.

[0315] In some embodiments, as shown in FIG18 , of the two first touch signal lines 301 in the first touch signal line group 16, the total length of the first compensation portion 17 of the first touch signal line 301 electrically connected to the first touch electrode 201 closer to the first portion 3-1 is greater than the total length of the first compensation portion 17 of the first touch signal line 301 electrically connected to the first touch electrode 201 farther from the first portion 3-1. That is, the total length of the first compensation portion of the second portion electrically connected to the first touch electrode closer to the first portion, i.e., the first peripheral region, is greater.

[0316] The touch display panel provided by the embodiment of the present disclosure has a larger total length of the first compensation portion included in the second portion electrically connected to the first touch electrode closer to the first portion, i.e., the first peripheral area, which is more conducive to eliminating the resistance difference between the second portions of different first touch signal lines, and can improve the touch performance.

[0317] In some embodiments, as shown in FIG. 18 , the orthographic projection of the first compensation portion 17 on the base substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the base substrate 1 .

[0318] Of course, other resistance compensation methods may also be used during specific implementation.

[0319] In some embodiments, as shown in FIG. 19 , in a direction in which the touch area 101 moves away from the first portion 3 - 1 , the line width of the second portion 3 - 2 in the first touch signal line group 16 increases gradually in a direction perpendicular to the extension direction thereof.

[0320] Alternatively, in some embodiments, as shown in FIG. 13 and FIG. 20 , at least part of the second portion 3 - 2 of the first touch signal line 301 includes at least one second compensation portion 18 ;

[0321] The width of the second compensation portion 18 in the direction perpendicular to the extension direction is greater than the width of the remaining area of ​​the second portion 3 - 2 in the direction perpendicular to the extension direction;

[0322] Among the two first touch signal lines 301 of the first touch signal line group 16, the number of second compensation parts 18 included in the first touch signal line 301 electrically connected to the first touch electrode 201 closer to the first part 3-1 is less than the number of second compensation parts 18 included in the first touch signal line 301 electrically connected to the first touch electrode 201 farther away from the first part 3-1.

[0323] The touch display panel provided by the embodiment of the present disclosure can reduce the resistance of the touch signal line by setting a second compensation part with a wider width, and the first touch signal line electrically connected to the first touch electrode that is farther away from the first peripheral area includes more second compensation parts, so that the resistance of the first touch signal line with a longer length is reduced more, thereby reducing the resistance difference between different first touch signal lines and improving touch performance.

[0324] It should be noted that the second compensation portion 18 shown in FIG. 13 and FIG. 20 corresponds to the first width region 27 .

[0325] In some embodiments, as shown in FIG. 13 , the second compensation portions 18 in different first touch signal lines 301 have the same width perpendicular to the extension direction.

[0326] Alternatively, in some embodiments, as shown in FIG20 , the second compensation portions 18 at different positions in the same first touch signal line 301 have the same width perpendicular to the extension direction;

[0327] Among the two first touch signal lines 301 of the first touch signal line group 16, the width of the second compensation portion 18 included in the first touch signal line 301 electrically connected to the first touch electrode 201 closer to the first part 3-1 is smaller than the width of the second compensation portion 18 included in the first touch signal line 301 electrically connected to the first touch electrode 201 farther away from the first part 3-1.

[0328] That is, the resistance of the second compensation part included in the first touch signal line electrically connected to the first touch electrode farther away from the first peripheral area is smaller, and the resistance of the first touch signal line with a longer length is further reduced, thereby reducing the resistance difference between different first touch signal lines and improving touch performance.

[0329] In some embodiments, as shown in Figures 13 and 20 , the orthographic projection of the second compensation portion 18 on the base substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the base substrate 1. In this way, increasing the line width of the first touch signal line does not increase the overlapping area between the first touch signal line and the second touch electrode, thereby reducing electrical interference between the two.

[0330] In some embodiments, as shown in FIG. 2 , FIG. 8 , FIG. 13 , FIG. 17 , FIG. 18 , FIG. 19 , and FIG. 20 , the second touch signal line 302 is electrically connected to the second touch electrodes 202 in a one-to-one correspondence, and the second touch signal line 302 only includes the first portion 3 - 1 .

[0331] Alternatively, in some embodiments, as shown in FIG21 , the plurality of second touch signal lines 302 include: a plurality of first-type second touch signal lines 302 - 1 and a plurality of second-type second touch signal lines 302 - 2 ;

[0332] The first type of second touch signal line 302 - 1 includes only the first portion 3 - 1 , and the first type of second touch signal line 302 - 1 is electrically connected to the second touch electrodes 202 in a one-to-one correspondence;

[0333] The second-type second touch signal line 302-2 includes a first part 3-1 and a second part 3-2. The second-type second touch signal line 302-2 is electrically connected to the second touch electrodes 202 in a one-to-one correspondence, and the second part 3-2 of the second-type second touch signal line 302-2 is electrically connected to the second sub-electrode 2021 of the second touch electrode 202 farthest from the first part 3-1.

[0334] In the touch display panel provided by the embodiment of the present disclosure, each second touch electrode is electrically connected to a plurality of second touch signal lines, thereby improving the transmission effect of the touch signal.

[0335] In some embodiments, as shown in FIG. 21 , the plurality of second touch signal lines 302 are located on one side of a first touch signal line group 16 .

[0336] In some embodiments, the plurality of first touch signal lines are divided into two first touch signal line groups, and the plurality of second touch signal lines of the second type are located between the two first touch signal line groups.

[0337] In some embodiments, as shown in FIG21 , the second portion 3 - 2 of the second type second touch signal line 302 - 2 includes: a third sub-portion 3021 extending along the first direction Y and electrically connected to the first portion 3 - 1 ;

[0338] The second portion 3 - 2 of at least part of the second-type second touch signal lines 302 - 2 further includes a fourth sub-portion 3022 extending along the second direction X and electrically connected to the third sub-portion 3021 and the second touch electrode 202 .

[0339] In some embodiments, as shown in FIG. 21 , the orthographic projection of the fourth sub-portion 3022 on the substrate 1 overlaps with the orthographic projections of the second sub-electrode 2021 and the first sub-electrode 2011 on the substrate 1 .

[0340] In some embodiments, as shown in FIG21 , the orthographic projection of the third sub-portion 3021 on the base substrate 1 overlaps with the orthographic projections of the second sub-electrode 2021 and the bridging electrode 2022 on the base substrate 1, while the orthographic projection of the third sub-portion 3021 on the base substrate 1 does not overlap with the orthographic projection of the second touch electrode 202 on the base substrate 1. This reduces the overlapping area between the first touch electrode and the second touch signal line, minimizing electrical interference between the two, thereby preventing impacts on touch accuracy and improving touch performance.

[0341] Alternatively, when the bridge electrode is small in size and the wiring space is limited, it can also be configured so that the orthographic projection of the third sub-portion on the base substrate overlaps with the orthographic projection of the second touch electrode on the base substrate.

[0342] In some embodiments, a total area S3 of an overlapping region between an orthographic projection of the second portion of the second-type second touch signal line on the substrate and an orthographic projection of the first touch electrode on the substrate, and an orthographic projection area S4 of the second portion of the second-type second touch signal line on the substrate satisfy the following relationship: S3 / S4≤10%;

[0343] And / or, a length L3 in the first direction Y of an overlapping area of ​​an orthographic projection of the second portion of the second touch signal line of the second type on the substrate and an orthographic projection of the first touch electrode on the substrate, and a length L4 of an orthographic projection of the second portion of the second touch signal line of the second type on the substrate satisfy: L3 / L4≤10%.

[0344] Therefore, the overlapping area between the second portion of the second touch signal line of the second type and the first touch electrode can be smaller, thereby reducing electrical interference between the two, thereby avoiding affecting touch accuracy and improving touch performance.

[0345] In some embodiments, as shown in FIG. 22 , at least a portion of the second portion 3 - 2 of the second type second touch signal line 302 - 2 includes a third width region 29 and a fourth width region 30 ;

[0346] The third width regions 29 and the fourth width regions 30 are arranged alternately;

[0347] The orthographic projection of the third width region 29 on the substrate 1 overlaps with the orthographic projection of the first sub-electrode 2011 on the substrate 1, and the orthographic projection of the third width region 29 on the substrate 1 does not overlap with the orthographic projection of the second sub-electrode 2021 on the substrate 1. The orthographic projection of the fourth width region 30 on the substrate 1 overlaps with the orthographic projection of the second sub-electrode 2021 on the substrate 1.

[0348] The width of the third width region 29 in the direction perpendicular to the extension direction is greater than the width of the fourth width region 30 in the direction perpendicular to the extension direction.

[0349] That is, the touch display panel provided by the embodiment of the present disclosure reduces the overlapping area between the second type second touch signal line and the second sub-electrode by reducing the width of the overlapping area between the two, thereby reducing electrical interference between the two, thereby avoiding affecting touch accuracy and improving touch performance.

[0350] In a specific implementation, in the touch area, the orthographic projection pattern of the second touch signal line of the second type on the base substrate is also a grid structure, that is, including a plurality of grids;

[0351] The number of meshes included in the fourth width region in the direction perpendicular to the extension direction is smaller than the number of meshes included in the third width region in the direction perpendicular to the extension direction.

[0352] Alternatively, the third width region includes a plurality of grids, and the orthographic projection pattern of the fourth width region on the base substrate is linear.

[0353] This allows the width of the third width region perpendicular to its extension direction to be greater than the width of the fourth width region perpendicular to its extension direction, reducing the overlapping area between the second touch signal line and the first touch electrode, reducing electrical interference between the two, and improving touch accuracy.

[0354] In a specific implementation, the patterns of the third width region and the fourth width region may be the same as or similar to the patterns of the first width region and the second width region shown in FIG. 14 and FIG. 15 , and are not described in detail here.

[0355] In some embodiments, as shown in FIG. 21 and FIG. 22 , in a direction in which the touch area 101 moves away from the first portion 3 - 1 , the length of the fourth sub-portion 3022 of the plurality of second-type second touch signal lines 302 - 2 in the second direction X gradually decreases;

[0356] In the direction from the fourth sub-portion 3022 to the third sub-portion 3021 , the length of the third sub-portion 3021 in the plurality of second-type second touch signal lines 302 - 2 in the first direction Y gradually decreases.

[0357] In some embodiments, as shown in FIG23 , the third touch conductive layer 403 further includes: a first shielding signal line 19 located between the second portion 3 - 2 of the first touch signal line 301 and the second portion 3 - 2 of the second type second touch signal line 302 - 2 ;

[0358] The first shielding signal line 19 includes: a third portion 1901 extending from the touch area 101 to the peripheral area 102 along the first direction Y, and a fourth portion 1902 extending along the second direction X and electrically connected to the third portion 1901;

[0359] In the second direction X, the third portion 1901 is located between the first sub-portion 3011 and the third sub-portion 3021 ; in the first direction Y, the fourth portion 1902 is located between the second sub-portion 3012 and the fourth sub-portion 3022 .

[0360] The touch display panel provided by the embodiment of the present disclosure is provided with a first shielding signal line between the second part of the first touch signal line and the second part of the second touch signal line of the second type, thereby avoiding mutual interference of signals between the second part of the first touch signal line and the second part of the second touch signal line of the second type.

[0361] It should be noted that FIG23 illustrates an example of a touch display panel including one first touch signal line group. In a specific implementation, the touch display panel may also include two first touch signal line groups; the two first touch signal line groups and the plurality of second-type second touch signal lines are each provided with a first shielding signal line.

[0362] In a specific implementation, the first shielding signal line is also electrically connected to the driver chip through the binding electrode. The signal loaded on the first shielding signal line can be a constant voltage signal. For example, the signal loaded on the first shielding signal line is a ground level signal.

[0363] In some embodiments, as shown in FIG24 , the third touch conductive layer 403 further includes: a plurality of second dummy electrodes 9 ;

[0364] The second dummy electrode 9 and the second portion 3 - 2 are spaced apart and insulated from each other.

[0365] In the embodiment of the present disclosure, the third conductive layer further includes a second dummy electrode, thereby avoiding the problem of uneven distribution of metal wires in the grid structure of the third conductive layer affecting display uniformity and improving display effects.

[0366] In a specific implementation, as shown in FIG25 , the third touch conductive layer 403 is arranged on the entire surface of the touch area. Specifically, the pattern of the third touch conductive layer 403 is a grid pattern (not shown), and an incision 1403 is set between the second dummy electrode 9 and the second part 3-2 to achieve the second dummy electrode 9 and the second part 3-2 being spaced apart and insulated from each other.

[0367] It should be noted that Figure 24 uses the example of a touch display panel including a group of first touch signal line groups and multiple second touch signal lines all being first-type second touch signal lines. In specific implementation, for the case where multiple groups of first touch signal line groups are included, and / or multiple second touch signal lines also include second-type second touch signal lines, a second dummy electrode can be set, as long as the second dummy electrode and the second part are disconnected by an incision to achieve mutual insulation.

[0368] In some embodiments, as shown in FIG27 , the third touch conductive layer 403 is located between the base substrate 1 and the first touch conductive layer 401 ;

[0369] As shown in FIG. 26 and FIG. 27 , the first touch conductive layer 401 further includes: a plurality of first connection electrodes 13 ; the first connection electrodes 13 are electrically connected to the second portion 3 - 2 .

[0370] It should be noted that FIG27 is a cross-sectional view along KK' in FIG26 .

[0371] In the touch display panel provided by the embodiment of the present disclosure, a first connection electrode is provided on the first touch conductive layer and electrically connected to the second portion of the touch signal line, thereby reducing the resistance of the touch signal line and improving the signal transmission speed.

[0372] It should be noted that Figures 26 and 27 illustrate the distance using an example in which the second portion of the touch area is the second portion of the first touch signal line, i.e., the first connection electrode is electrically connected to the second portion of the first touch signal line. In a specific implementation, when the plurality of second touch signal lines include second-type second touch signal lines, the first touch conductive layer further includes a first connection electrode electrically connected to the second portion of the second-type second touch signal line.

[0373] In a specific implementation, the pattern of the orthographic projection of the first connecting electrode on the base substrate is also a grid structure, and a cutout may be provided to disconnect the grid of the first connecting electrode from the grid of the bridging electrode.

[0374] In some embodiments, the orthographic projection of the first connecting electrode on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate, and does not overlap with the orthographic projection of the second sub-electrode on the base substrate.

[0375] Alternatively, in some embodiments, as shown in FIG26 , the orthographic projection of a portion of the first connecting electrode 13 on the base substrate 1 falls within the orthographic projection of the first sub-electrode 2011 on the base substrate 1 ;

[0376] The orthographic projection of a portion of the first connecting electrode 13 on the base substrate 1 overlaps with the orthographic projection of the first sub-electrode 2011 on the base substrate 1 and the orthographic projection of the second sub-electrode 2021 on the base substrate 1 .

[0377] In a specific implementation, the orthographic projection of the first connecting electrode electrically connected to the second sub-part on the substrate falls within the orthographic projection of the first sub-electrode on the substrate, and the orthographic projection of the first connecting electrode electrically connected to the first sub-part on the substrate overlaps with the orthographic projection of the first sub-electrode on the substrate and the orthographic projection of the second sub-electrode on the substrate.

[0378] In some embodiments, as shown in FIG28 , the first touch conductive layer 401 further includes a third dummy electrode 20 located between the first connection electrode 13 and the bridging electrode 2022. This can avoid signal interference between the first connection electrode and the bridging electrode, thereby improving touch performance.

[0379] In a specific implementation, the orthographic projection pattern of the third dummy electrode on the base substrate is also a grid structure, and cuts can be provided to disconnect the grid of the first connection electrodes from the grid of the third dummy electrodes, and the grid of the third dummy electrodes from the grid of the bridging electrodes.

[0380] In some embodiments, as shown in FIG30 , the first portion 3 - 1 includes a plurality of sub-signal lines 23 stacked in layers;

[0381] The multi-layer sub-signal line 23 includes a first sub-signal line 2301, a second sub-signal line 2302, and a third sub-signal line 2303 sequentially arranged on one side of the base substrate 1; the first sub-signal line 2301, the second sub-signal line 2302, and the third sub-signal line 2303 are respectively located in three touch conductive layers.

[0382] In the touch display panel provided by the embodiment of the present disclosure, the first part of the touch signal line includes a plurality of stacked sub-signal lines, which can reduce the resistance of the touch signal line and improve the touch performance.

[0383] In some embodiments, as shown in FIG. 29 , at least part of the first portion 3 - 1 includes a fifth sub-portion 3 - 1 - 1 extending along the second direction X, and a sixth sub-portion 3 - 1 - 2 extending along the first direction Y.

[0384] FIG. 30 is, for example, a cross-sectional view along line MM′ in FIG. 29 .

[0385] In some embodiments, as shown in FIG30 , the first touch insulating layer 701 is located between the first sub-signal line 2301 and the second sub-signal line 2302 , and the second touch insulating layer 702 is located between the second sub-signal line 2302 and the third sub-signal line 2303 ;

[0386] At least a portion of the sixth sub-portion 3-1-2 includes a first sub-signal line 2301, a second sub-signal line 2302, and a third sub-signal line 2303. In the sixth sub-portion 3-1-2, the second sub-signal line 2302 is electrically connected to the first sub-signal line 2301 through a first via 7011 penetrating the first touch insulating layer 701, and the third sub-signal line 2303 is electrically connected to the second sub-signal line 2302 through a second via 7021 penetrating the second touch insulating layer 702.

[0387] The orthographic projection of the first via hole 7011 on the base substrate 1 and the orthographic projection of the second via hole 7021 on the base substrate 1 do not overlap with each other.

[0388] The touch display panel provided by the embodiment of the present disclosure realizes electrical connection of multiple sub-signal lines by arranging first vias and second vias in the touch insulating layer, and the orthographic projections of the first vias and the second vias do not overlap with each other, thereby improving the flatness of the sub-signal line arrangement and avoiding the problem of sub-signal lines being overlapped and broken at the vias due to poor flatness caused by the overlap of the first vias and the second vias, thereby improving the conductive effect and conductive yield.

[0389] It should be noted that FIG30 illustrates an example in which the third touch conductive layer 403 is located between the base substrate 1 and the first touch conductive layer 401. The third touch conductive layer 403 includes a first sub-signal line 2301, the first touch conductive layer 401 includes a second sub-signal line 2302, and the second touch conductive layer 402 includes a third sub-signal line 2303. When the third touch conductive layer is located on the base substrate side of the second touch conductive layer, the first touch conductive layer includes a first sub-signal line, the second touch conductive layer includes a second sub-signal line, and the third touch conductive layer includes a third sub-signal line.

[0390] In some embodiments, as shown in FIG. 31 and FIG. 32 , the fifth sub-portion 3 - 1 - 1 includes one of a first sub-signal line 2301 , a second sub-signal line 2302 , and a third sub-signal line 2303 ;

[0391] The orthographic projections of the fifth sub-portions 3 - 1 - 1 located in different layers on the base substrate 1 overlap.

[0392] The touch display panel provided by the embodiment of the present disclosure has a plurality of adjacent fifth portions extending along the second direction, so that the orthographic projections of the sub-signal lines located in different layers overlap, thereby reducing the occupied width of the plurality of adjacent fifth sub-portions, thereby reducing the size of the first peripheral area, and facilitating the realization of a narrow bezel effect.

[0393] FIG31 is an enlarged schematic diagram of the N region in FIG29 , and FIG32 is a cross-sectional view along line PP′ in FIG31 .

[0394] In some embodiments, in FIG32 , the arrangement order of the orthographic projections of the fifth sub-portions 3 - 1 - 1 included in the plurality of adjacent first portions on the substrate 1 is the same as the arrangement order of the plurality of first portions.

[0395] Alternatively, in some embodiments, in Figure 33, the arrangement order of the orthographic projections of the fifth sub-parts 3-1-1 included in the multiple adjacent first parts on the substrate 1 is not exactly the same as the arrangement order of the multiple first parts, so as to increase the overlapping area of ​​the orthographic projections of the fifth sub-parts located on different layers on the substrate, thereby further reducing the occupied width of the multiple adjacent fifth sub-parts, and then reducing the size of the first peripheral area, which is conducive to achieving a narrow frame effect.

[0396] In some embodiments, as shown in FIG29 , the touch display panel further includes: a retaining wall 11 located in the peripheral area 102 ;

[0397] As shown in Figure 34, the orthographic projection of the first part 3-1 on the substrate substrate 1 overlaps with the orthographic projection of the retaining wall 11 on the substrate substrate 1, as described in Figure 35, and in the area where the orthographic projection of the first part 3-1 on the substrate substrate 1 overlaps with the orthographic projection of the retaining wall 11 on the substrate substrate 1, the first part 3-1 includes 1 layer or 2 layers of sub-signal lines 23.

[0398] It should be noted that Figure 34 is an enlarged schematic diagram along the O area in Figure 29, and Figure 35 is a cross-sectional view along line RR' in Figure 34. Figure 35 illustrates an example in which the first portion 3-1 includes two layers of sub-signal lines 23 in the area corresponding to the retaining wall 11. The two layers of sub-signal lines 23 are respectively a first sub-signal line 2301 and a third sub-signal line 2303. Of course, the two layers of sub-signal lines can also be a second sub-signal line and a first sub-signal line, or a second sub-signal line and a third sub-signal line. When the retaining wall area includes a single layer of sub-signal lines, the single layer of sub-signal lines can be the first sub-signal line, the second sub-signal line, or the third sub-signal line.

[0399] In some embodiments, as shown in FIG29 , the orthographic projection of the retaining wall 11 on the base substrate 1 surrounds the touch area 101 ; the peripheral area 102 includes a plurality of retaining walls 11 , namely a first retaining wall 1101 and a second retaining wall 1102 located on the side of the first retaining wall 1101 away from the touch area 101 .

[0400] In a specific implementation, the touch display panel, for example, further includes a spacer located on the side of the pixel definition layer facing away from the base substrate. A retaining wall is used to prevent overflow of the organic encapsulation layer. The retaining wall, for example, includes a first substructure disposed on the same layer as the second planarization layer and a second substructure disposed on the same layer as the pixel definition layer. The second retaining wall also includes a third substructure disposed on the side of the second substructure facing away from the first substructure and disposed on the same layer as the spacer layer. The retaining wall is made of an organic material. The patterning process for the sub-signal lines can easily result in metal residue around the organic retaining wall structure, leading to short circuits between adjacent touch signal lines.

[0401] The touch display panel provided by the embodiment of the present disclosure reduces the number of sub-signal lines in the region of the retaining wall, thereby reducing the possibility of short circuits between adjacent touch signal lines and improving the manufacturing yield.

[0402] In some embodiments, the first portion includes layers or layers of sub-signal lines in the area between the first and second retaining walls, the portion of the first retaining wall facing the touch area, and the portion of the second retaining wall facing away from the touch area. This reduces the number of sub-signal lines in the area near the retaining walls, thereby minimizing the possibility of short circuits between adjacent touch signal lines and improving manufacturing yield.

[0403] In some embodiments, as shown in FIG34 , the width of the first portion 3-1 in the area that overlaps with the orthographic projection of the retaining wall 11 on the base substrate, in the direction perpendicular to its extension, is smaller than the width of the first portion 3-1 in the area outside the retaining wall 11, in the direction perpendicular to its extension. This increases the distance between adjacent first portions in the area corresponding to the retaining wall, thereby reducing the possibility of short circuits between adjacent touch signal lines and improving manufacturing yield.

[0404] In some embodiments, as shown in FIG. 36 to FIG. 40 , the first peripheral region 1021 includes a bending region 10211 extending along the second direction X;

[0405] The orthographic projection of the first portion 3 - 1 on the base substrate 1 overlaps with the bending region 10211 , and in the bending region 10211 , the first portion 3 - 1 includes only one layer of sub-signal lines 23 .

[0406] In some embodiments, as shown in FIG. 38 to FIG. 40 , the multi-layer sub-signal line 23 further includes: a fourth sub-signal line 2304 located between the first sub-signal line 2301 and the base substrate 1 ;

[0407] The orthographic projection of the fourth sub-signal line 2304 on the base substrate 1 passes through the bending region 10211 , and the orthographic projections of the first sub-signal line 2301 , the second sub-signal line 2302 , and the third sub-signal line 2303 on the base substrate 1 do not overlap with the bending region 10211 .

[0408] In some embodiments, as shown in FIG. 38 to FIG. 40 , in the area outside the bending region 10211 , the fourth sub-signal line 2304 is electrically connected to one of the first sub-signal line 2301 , the second sub-signal line 2302 , and the third sub-signal line 2303 .

[0409] In the touch display panel provided by the embodiment of the present disclosure, the fourth sub-signal line passing through the bending area is located between the first sub-signal line and the base substrate, that is, compared with other sub-signal lines, the fourth sub-signal line is closer to the base substrate. When the bending area is bent along the bending axis, the stress of the sub-signal line can be reduced, the sub-signal line can be prevented from bending and breaking, and the yield of the touch display panel can be improved.

[0410] In a specific implementation, the fourth sub-signal line is, for example, located in a bend-neutral layer, ie, a film layer that is neither tensile nor compressive, or is relatively close to the bend-neutral layer. Depending on the structure of the touch display panel, the fourth sub-signal line is, for example, disposed in the same layer as the drain electrode or the transfer electrode.

[0411] It should be noted that FIG37 is an enlarged schematic diagram of the T region in FIG36 , and FIG38 to FIG40 are cross-sectional views of UU′ in FIG37 , respectively.

[0412] In some embodiments, as shown in FIG. 37 , the bending region 20111 is located on a side of the second retaining wall away from the touch region 101 .

[0413] In some embodiments, as shown in FIG. 38 to FIG. 40 , the fourth sub-signal line 2304 is electrically connected to the remaining sub-signal lines 23 through the fifth via 34 on a side close to the second blocking wall 1102 .

[0414] In some embodiments, as shown in FIG. 38 , the first sub-signal line 2301 is electrically connected to the fourth sub-signal line 2304 through a fifth via hole 34 penetrating the display insulating layer 35 .

[0415] Alternatively, in some embodiments, as shown in FIG. 39 , the second sub-signal line 2302 is electrically connected to the fourth sub-signal line 2304 through a fifth via hole 34 penetrating the first touch insulating layer 701 and the display insulating layer 35 .

[0416] Alternatively, in some embodiments, as shown in FIG. 40 , the third sub-signal line 2303 is electrically connected to the fourth sub-signal line 2304 through a fifth via hole 34 penetrating the second touch insulation layer 702 , the first touch insulation layer 701 , and the display insulation layer 35 .

[0417] In a specific implementation, if the fourth sub-signal line is disposed in the same layer as the transfer electrode, the display insulation layer through which the fifth via penetrates may include, for example, an encapsulation layer, a pixel definition layer, and a second planarization layer. If the fourth sub-signal line is disposed in the same layer as the drain electrode, the display insulation layer through which the fifth via penetrates may include, for example, an encapsulation layer, a pixel definition layer, a second planarization layer, and a first planarization layer.

[0418] The present disclosure provides a touch display panel, as shown in FIG41 and FIG42 , including:

[0419] The base substrate 1 includes a touch area 101 and a peripheral area 102 surrounding the touch area 101;

[0420] The display layer 5 is located on one side of the base substrate 1 and includes a plurality of light-emitting units (not shown), each of which includes a stacked anode, a light-emitting functional layer, and a cathode.

[0421] A plurality of touch electrodes 2 are located on the side of the display layer 5 away from the base substrate 1 in the touch area 101 . The touch electrodes 2 include a sub-electrode 2 - 1 and a connecting electrode 2 - 2 located in a different layer from the sub-electrode 2 - 1 and electrically connected to the sub-electrode 2 - 1 .

[0422] It should be noted that in the related art, for medium and large-sized touch display products larger than 10 inches, the touch electrodes are longer and have greater resistance, so the overlap capacitance between the touch electrodes and the cathode increases, reducing touch performance.

[0423] The touch display panel provided by the embodiment of the present disclosure has a touch electrode including a sub-electrode and a connecting electrode located in a different layer and electrically connected to the sub-electrode, which is equivalent to the touch electrode being composed of multiple conductive layers in parallel. Compared with the case of a single-layer sub-electrode, the resistance of the touch electrode can be reduced, thereby reducing the overlapping capacitance between the touch electrode and the cathode, thereby improving the touch performance.

[0424] In some embodiments, as shown in FIG. 41 and FIG. 42 , the touch display panel includes: a multi-layer touch conductive layer 4 including:

[0425] A first touch conductive layer 401; the first touch conductive layer 401 includes a portion of the plurality of touch electrodes 2;

[0426] The second touch conductive layer 402 is located on a side of the first touch conductive layer 401 facing away from the base substrate 1 ; the second touch conductive layer 402 includes the remaining parts of the plurality of touch electrodes 2 ;

[0427] The third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 , or located on a side of the second touch conductive layer 402 away from the base substrate 1 ; the third touch conductive layer 403 includes a connecting electrode 2 - 2 .

[0428] Specifically, in FIG41 , the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 ; in FIG42 , the third touch conductive layer 403 is located on a side of the second touch conductive layer 402 facing away from the base substrate 1 .

[0429] In some embodiments, as shown in FIG. 41 and FIG. 42 , the touch display panel further includes: a multi-layer touch insulating layer 7 ; at least a portion of the touch insulating layer 7 is located between two adjacent touch conductive layers 4 ;

[0430] The multi-layer touch insulation layer 7 includes: a first touch insulation layer 701, and a second touch insulation layer 702 located on the side of the first touch insulation layer 701 facing away from the base substrate 1; in Figure 41, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the third touch conductive layer 403, and the second touch insulation layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402; in Figure 42, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the second touch conductive layer 402, and the second touch insulation layer 702 is located between the third touch conductive layer 403 and the second touch conductive layer 402.

[0431] In some embodiments, as shown in FIG. 41 and FIG. 42 , the plurality of touch electrodes 2 include:

[0432] A plurality of first touch electrodes 201 extending along the second direction X and arranged along the first direction Y; the first touch electrodes 201 include a plurality of first sub-electrodes 2011 arranged along the second direction X;

[0433] A plurality of second touch electrodes 202 are arranged along the second direction X and extend along the first direction Y. The second touch electrodes 202 include: a plurality of second sub-electrodes 2021 arranged along the first direction Y, and a bridging electrode 2022 electrically connecting two adjacent second sub-electrodes 2021;

[0434] That is, the sub-electrode 2 - 1 includes a first sub-electrode 2011 and a second sub-electrode 2012 ; wherein the first touch conductive layer 401 includes a bridging electrode 2022 , and the second touch conductive layer 402 includes a first sub-electrode 2011 and a second sub-electrode 2021 .

[0435] In some embodiments, as shown in Figures 41 and 42, the second sub-electrode 2021 is electrically connected to the bridging electrode 2022 through a third via 24 that penetrates the touch insulation layer 7; in Figure 41, the third via 24 is a via that penetrates the second touch insulation layer 702; in Figure 42, the third via 24 is a via that penetrates the first touch insulation layer 701.

[0436] In some embodiments, as shown in FIG41 and FIG42 , the plurality of connection electrodes 2 - 2 include a plurality of second connection electrodes (not shown) and a plurality of third connection electrodes 22 ; that is, the third touch conductive layer 403 includes: a plurality of second connection electrodes (not shown) and a plurality of third connection electrodes 22 ;

[0437] The second connecting electrode (not shown) is electrically connected to the first touch electrode 201 , and the third connecting electrode 22 is electrically connected to the second touch electrode 202 ; specifically, the second connecting electrode (not shown) is electrically connected to the first sub-electrode 2011 , and the third connecting electrode 22 is electrically connected to the second sub-electrode 2021 .

[0438] In some embodiments, as shown in Figures 41 and 42 , the connecting electrode 2-2 is electrically connected to the sub-electrode 2-2 through a sixth via 36. In Figure 41 , the sixth via 36 is a via that passes through the second touch insulating layer 702 and the first touch insulating layer 701; in Figure 42 , the sixth via 36 is a via that passes through the second touch insulating layer 702.

[0439] In a specific implementation, as shown in the touch display panel of FIG42 , the connection electrode 2-2 is electrically connected to the sub-electrode 2-1 only through the sixth via 36 that penetrates one layer of the touch insulating layer 7. Compared with the case where the sixth via penetrates multiple insulating layers, the manufacturing process difficulty of the sixth via can be reduced.

[0440] In some embodiments, as shown in FIG. 41 and FIG. 42 , the touch display panel further includes: a touch signal line 3 .

[0441] In some embodiments, the touch signal lines can be arranged in the manner described in the previous embodiments and in Figures 2 to 40 , i.e., the touch signal lines 3 are electrically connected to the touch electrodes 2; the touch signal lines 3 include a first portion 3-1 located on one side of the touch area 101 in the first direction Y; at least some of the touch signal lines 3 also include a second portion 3-2 located in the touch area 101 and electrically connected to the first portion 3-1, with the second portion 3-2 and the touch electrode 2 being located on a different film layer; and a third touch conductive layer including the second portion 3-2. The specific implementations of the display layer, encapsulation layer, touch electrodes, and touch signal lines are described in the previous embodiments and will not be repeated here.

[0442] Alternatively, in some embodiments, the touch signal lines may be arranged as shown in FIG1 , that is, the touch signal lines 3 are located in the peripheral area 102 and do not pass through the touch area 101. As shown in FIG43 and FIG44 , in the touch area, the third touch conductive layer 403 does not include touch signal lines.

[0443] In some embodiments, the orthographic projection of the connecting electrode on the base substrate is also in a grid structure.

[0444] In some embodiments, the touch insulating layer may be at least one of an organic insulating layer and an inorganic insulating layer. Preferably, the touch insulating layer is an organic insulating layer.

[0445] It should be noted that during the manufacturing process of the insulating layer, the thickness of the organic insulating layer can usually be greater than the thickness of the inorganic insulating layer. In this way, compared with the inorganic insulating layer solution, the distance between the touch electrode and the cathode can be increased, thereby reducing the overlap capacitance between the touch electrode and the cathode and improving the touch performance.

[0446] The embodiment of the present disclosure provides a touch display panel, as shown in Figures 45, 46, and 47, the touch display panel includes: a base substrate 1 including: a touch area 101, and a peripheral area 102 surrounding the touch area 101;

[0447] The touch display panel further includes: a display layer 5, and a touch layer 37 located on a side of the display layer 5 facing away from the base substrate 1; the display layer 5 includes a plurality of light-emitting units 502 located in a touch area; the touch layer 37 includes a multi-layer touch conductive layer 4 and a multi-layer touch insulating layer 7; in the touch area, the orthographic projection pattern of the touch conductive layer 4 on the base substrate 1 includes a plurality of grids 1401, each grid 1401 corresponding to at least one light-emitting unit 502, and the orthographic projection of the light-emitting area 502-1 of the light-emitting unit 502 on the base substrate 1 falls within the orthographic projection of the grid 1401 on the base substrate 1;

[0448] In the multi-layer touch insulating layer 7 , part of the touch insulating layer 7 is located between adjacent touch conductive layers 4 ;

[0449] In the multi-layer touch insulating layer 7, part of the touch insulating layer 7 is located on a side of the touch conductive layer 4 farthest from the base substrate 1 and facing away from the base substrate 1, and / or part of the touch insulating layer 7 is located between the touch conductive layer 4 closest to the base substrate 1 and the base substrate 1. Specifically, part of the touch insulating layer 7 is located between the touch conductive layer 4 closest to the base substrate 1 and the display layer 5.

[0450] The touch layer 37 includes a plurality of light extraction structures 3701 ; the light extraction structure 3701 includes a first substructure 37011 and a second substructure 37012 located on a side of the first substructure 37011 facing away from the substrate 1 ;

[0451] The first substructure 37011 includes an opening 38. The orthographic projection of the opening 38 on the substrate 1 covers the orthographic projection of the light-emitting area 502-1 of the light-emitting unit 502 on the substrate 1. At the opening 38, the first substructure 37011 includes an inclined side surface 39. The second substructure 37012 covers the opening and the inclined side surface 39. The refractive index of the first substructure 37011 is less than the refractive index of the second substructure 37012.

[0452] At least one touch insulation layer 7 in the multi-layer touch insulation layer 7 includes a first substructure 37011 , and another touch insulation layer 7 located on a side of the touch insulation layer 7 facing away from the base substrate 1 and adjacent to the touch insulation layer 7 includes a second substructure 37012 .

[0453] In the touch display panel provided by the disclosed embodiments, the second substructure covers the opening and the inclined side surface, and the refractive index of the first substructure is lower than that of the second substructure. As a result, light emitted by the light-emitting unit is totally reflected by the inclined side surface and then emitted toward the light-emitting side of the touch display panel, thereby improving light extraction efficiency. Furthermore, forming a light extraction substructure within the touch insulation layer further improves light extraction efficiency without increasing the process flow or complexity, thereby saving costs.

[0454] In some embodiments, as shown in FIG. 45 to FIG. 47 , the multi-layer touch conductive layer 4 specifically includes:

[0455] A first touch conductive layer 401; a second touch conductive layer 402, located on a side of the first touch conductive layer 401 facing away from the base substrate 1;

[0456] In some embodiments, the multi-layer touch conductive layer includes a plurality of touch electrodes;

[0457] The first touch conductive layer includes a portion of the plurality of touch electrodes, and the second touch conductive layer includes the remaining portion of the plurality of touch electrodes.

[0458] In some embodiments, the plurality of touch electrodes include:

[0459] A plurality of first touch electrodes extending along the second direction X and arranged along the first direction Y; the first touch electrodes include a plurality of first sub-electrodes arranged along the second direction X;

[0460] The plurality of second touch electrodes are arranged along the second direction X and extend along the first direction Y. The second touch electrodes include: a plurality of second sub-electrodes arranged along the first direction Y, and a bridge electrode electrically connecting two adjacent second sub-electrodes.

[0461] In some embodiments, as shown in FIG45 , the multi-layer touch insulation layer 7 includes: a first touch insulation layer 701 , a second touch insulation layer 702 located on a side of the first touch insulation layer 701 facing away from the base substrate 1 , and a third touch insulation layer 703 located on a side of the second touch insulation layer 702 facing away from the base substrate 1 ;

[0462] The first touch insulating layer 701 is located between the first touch conductive layer 401 and the display layer 5 , and serves as a buffer layer. The second touch insulating layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402 . The third touch insulating layer 703 is located on a side of the second touch conductive layer 402 facing away from the base substrate 1 .

[0463] The first touch insulating layer 701 includes a plurality of first openings 3801 located in the touch area 101. The orthographic projections of the first openings 3801 on the base substrate 1 cover the orthographic projections of the light-emitting area on the base substrate 1. The orthographic projections of the first openings 3801 on the base substrate 1 do not overlap with the orthographic projections of the metal lines of the grid 1401 of the touch conductive layer 4 on the base substrate 1.

[0464] In the first opening 3801 , the first touch insulating layer 701 has a first inclined side surface 3901 , and the second touch insulating layer 702 covers the first inclined side surface 3901 and the first opening 3801 ;

[0465] The refractive index of the second touch insulating layer 702 is greater than the refractive index of the first touch insulating layer 701 .

[0466] In some embodiments, as shown in FIG. 46 and FIG. 47 , the multi-layer touch conductive layer 4 further includes:

[0467] The third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 , or located on a side of the second touch conductive layer 402 facing away from the base substrate 1 .

[0468] That is, in the touch area, the pattern of the orthographic projection of the first touch conductive layer, the second touch conductive layer, and the third touch conductive layer on the base substrate includes multiple grids; each grid corresponds to at least one light-emitting unit, and the orthographic projection of the light-emitting area of ​​the light-emitting unit on the base substrate falls within the orthographic projection of the grid on the base substrate 1.

[0469] In a specific implementation, the third touch conductive layer includes connecting electrodes and / or touch signal lines. When the touch conductive layer further includes a third touch conductive layer, the specific configuration of the touch display panel is as described above in connection with the embodiments of FIG. 2 to FIG. 44 and will not be described in detail here.

[0470] Specifically, in FIG46 , the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 ; in FIG47 , the third touch conductive layer 403 is located on the side of the second touch conductive layer 402 facing away from the base substrate 1 .

[0471] In some embodiments, as shown in Figures 46 and 47, a first touch insulation layer 701, a second touch insulation layer 702 located on the side of the first touch insulation layer 701 facing away from the base substrate 1, a third touch insulation layer 703 located on the side of the touch conductive layer 4 farthest from the base substrate 1 facing away from the base substrate 1, and a fourth touch insulation layer 704 located on the side of the third touch insulation layer 703 facing away from the base substrate 1.

[0472] Specifically, in FIG46 , the first touch insulating layer 701 is located between the first touch conductive layer 401 and the third touch conductive layer 403 , and the second touch insulating layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402 ; in FIG47 , the first touch insulating layer 701 is located between the first touch conductive layer 401 and the second touch conductive layer 402 , and the second touch insulating layer 702 is located between the third touch conductive layer 403 and the second touch conductive layer 402 .

[0473] In some embodiments, as shown in FIG. 46 and FIG. 47 , the first touch insulating layer 701 includes a plurality of first openings 3801 located in the touch area 101 , and the orthographic projections of the first openings 3801 on the base substrate 1 cover the orthographic projections of the light emitting area on the base substrate 1 ;

[0474] In the first opening 3801 , the first touch insulating layer 701 has a first inclined side surface 3901 , and the second touch insulating layer 702 covers the first inclined side surface 3901 and the first opening 3801 ;

[0475] The refractive index of the second touch insulating layer 702 is greater than the refractive index of the first touch insulating layer 701 ;

[0476] The third touch insulating layer 703 includes a plurality of second openings 3802 located in the touch area 101 , and the orthographic projections of the second openings 3802 on the base substrate 1 cover the orthographic projections of the light emitting area on the base substrate 1 ;

[0477] In the second opening 3802 , the third touch insulating layer 703 has a second inclined side surface 3902 , and the fourth touch insulating layer 704 covers the second inclined side surface 3902 and the second opening 3802 ;

[0478] The refractive index of the fourth touch insulating layer 704 is greater than the refractive index of the third touch insulating layer 703 .

[0479] That is, in the touch display panel provided by the embodiment of the present disclosure, each light-emitting area corresponds to two stacked light extraction structures, and light is totally reflected when reaching the inclined side surfaces of the two light extraction structures, which can further improve the light extraction efficiency of the touch display panel.

[0480] In some embodiments, the orthographic projection of the first opening on the base substrate does not overlap with the orthographic projection of the touch signal line and the touch electrode on the base substrate; the orthographic projection of the second opening on the base substrate does not overlap with the orthographic projection of the touch signal line and the touch electrode on the base substrate.

[0481] In some embodiments, the refractive index of the first touch insulation layer and the third touch insulation layer is greater than or equal to 1.4 and less than 1.6, and the refractive index of the second touch insulation layer and the fourth touch insulation layer is greater than or equal to 1.6 and less than or equal to 1.9.

[0482] An embodiment of the present disclosure provides a touch display panel, as shown in FIG48 , including:

[0483] The base substrate 1 includes a touch area 101 and a peripheral area 102 surrounding the touch area 101;

[0484] The multilayer touch conductive layer 4 is located on one side of the base substrate 1; it includes: multiple touch electrodes 2, multiple touch signal lines 3, multiple antenna electrodes 40, and antenna signal lines 41 electrically connected to the multiple antenna electrodes 40; the touch electrodes 2 and the antenna electrodes 40 are located in the touch area 101, and the antenna electrode 40 is located at the edge of the touch area 101.

[0485] In the touch display panel provided by the embodiments of the present disclosure, antenna electrodes and antenna signal lines are located in the touch conductive layer. That is, the antenna electrodes and antenna signal lines are arranged on the same layer as the touch electrodes and / or touch signal lines, which can simplify process flow and reduce costs. Furthermore, the antenna electrodes are located at the edge of the touch area, which can also reduce the impact of the antenna electrodes on touch control.

[0486] In some embodiments, as shown in FIG48 , the peripheral region 102 includes: a first peripheral region 1021 and a second peripheral region 1022 located on either side of the touch region 101 in the first direction Y, and a third peripheral region 1023 and a fourth peripheral region 1024 located on either side of the touch region 101 in the second direction X. In FIG2 , the first portion 3-1 is located in the first peripheral region 1021, and the second direction X intersects the first direction Y. In FIG2 , the second direction X is perpendicular to the first direction Y. The first peripheral region 1021 includes a binding region 12, which includes a plurality of binding electrodes (not shown). The touch signal line 3 includes a first portion 3-1, and the binding electrodes are bound to the first portion 3-1.

[0487] The antenna electrode 41 is located at an edge of the touch area 101 away from the first portion 3 - 1 ;

[0488] The antenna signal line 41 includes: a fifth portion 4101 located in the peripheral area 102 , and a sixth portion 4102 located in the touch area 101 ;

[0489] The orthographic projections of the fifth portion 4101 and the sixth portion 4102 on the base substrate 1 overlap with the edge of the touch area 101 .

[0490] In specific implementation, as shown in Figure 48, the orthographic projection of the antenna electrode 40 on the substrate 1 is located at the edge of the touch area 101 close to the second peripheral area 1022, the fifth part 4101 is electrically connected to multiple antenna electrodes 40, the orthographic projection of the fifth part 4101 on the substrate 1 overlaps with the edge of the touch area 101 close to the second peripheral area 1022, and the orthographic projection of the sixth part 4102 on the substrate 1 overlaps with the edge of the touch area 101 close to the third peripheral area 1023.

[0491] In the touch display panel provided by the embodiment of the present disclosure, the orthographic projection of the antenna signal line on the base substrate does not overlap with the fourth peripheral area, the second peripheral area, and the third peripheral area outside the first peripheral area. This can completely eliminate the influence of the antenna signal line on the sizes of the fourth peripheral area, the second peripheral area, and the third peripheral area, reduce the sizes of the fourth peripheral area, the second peripheral area, and the third peripheral area, and achieve an extremely narrow bezel effect.

[0492] In some embodiments, as shown in FIG48 , the plurality of touch electrodes 2 include:

[0493] A plurality of first touch electrodes 201 extending along the second direction X and arranged along the first direction Y; the first touch electrodes 201 include a plurality of first sub-electrodes 2011 arranged along the second direction X;

[0494] A plurality of second touch electrodes 202 are arranged along the second direction X and extend along the first direction Y. The second touch electrodes 202 include: a plurality of second sub-electrodes 2021 arranged along the first direction Y, and a bridging electrode 2022 electrically connecting two adjacent second sub-electrodes 2021;

[0495] As shown in FIG49 to FIG52 , the multi-layer touch conductive layer 4 includes:

[0496] The first touch conductive layer 401 includes a bridge electrode 2022 ;

[0497] The second touch conductive layer 402 is located on a side of the first touch conductive layer 401 away from the base substrate 1 ; the second touch conductive layer 402 includes a first sub-electrode 2011 and a second sub-electrode 2021 ;

[0498] The third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 , or on the side of the second touch conductive layer 402 facing away from the base substrate 1 ; the third touch conductive layer 403 includes antenna electrodes 40 and / or antenna signal lines 41 .

[0499] 49 to 52 are cross-sectional views along line QQ' in FIG48. In FIG49 and 51, the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1; in FIG50 and 52, the third touch conductive layer 403 is located on the side of the second touch conductive layer 402 away from the base substrate 1.

[0500] In a specific implementation, as shown in FIG48 , the orthographic projection of the antenna electrode 40 on the substrate 1 is located at the edge of the touch area 101 close to the second peripheral area 1022, the fifth portion 4101 is electrically connected to the plurality of antenna electrodes 40, the orthographic projection of the fifth portion 4101 on the substrate 1 overlaps with the edge of the touch area 101 close to the second peripheral area 1022, and the orthographic projection of the sixth portion 4102 on the substrate 1 overlaps with the edge of the touch area 101 close to the third peripheral area 1023.

[0501] In some embodiments, as shown in FIG. 48 , the orthographic projection of one edge of the antenna electrode 40 on the base substrate 1 is located on the same straight line as one edge of the second sub-electrode 2021 .

[0502] In some embodiments, as shown in FIG. 49 to FIG. 52 , the touch display panel further includes: a multi-layer touch insulating layer 7 ; at least a portion of the touch insulating layer 7 is located between two adjacent touch conductive layers 4 ;

[0503] The multi-layer touch insulation layer 7 includes: a first touch insulation layer 701, and a second touch insulation layer 702 located on the side of the first touch insulation layer 701 facing away from the base substrate 1; in Figures 49 and 51, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the third touch conductive layer 403, and the second touch insulation layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402; in Figures 50 and 52, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the second touch conductive layer 402, and the second touch insulation layer 702 is located between the third touch conductive layer 403 and the second touch conductive layer 402.

[0504] In some embodiments, as shown in FIG. 49 and FIG. 50 , the antenna electrode 40 and the antenna signal line 41 are located in the third touch conductive layer 403 .

[0505] It should be noted that Figures 49 and 50 illustrate an example in which the orthographic projection of the antenna electrode 40 on the base substrate 1 overlaps with the orthographic projection of the touch electrode 2 on the base substrate 1. In a specific implementation, to avoid electrical interference, the orthographic projection of the antenna electrode on the base substrate and the orthographic projection of the touch electrode on the base substrate may also be configured to not overlap.

[0506] Alternatively, in some embodiments, as shown in FIG. 51 and FIG. 52 , the antenna electrode 40 is located in the second touch conductive layer 402 , and the antenna signal line 41 is located in the third touch conductive layer 403 .

[0507] In some embodiments, as shown in FIG. 53 and FIG. 54 , the second touch conductive layer 402 further includes: a fourth dummy electrode 43 located between the touch electrode 2 and the antenna electrode 40 .

[0508] In the touch display panel provided by the embodiment of the present disclosure, a fourth dummy electrode is provided between the touch electrode and the antenna electrode, thereby avoiding interference when the antenna electrode and the touch electrode are provided in the same layer.

[0509] In some embodiments, as shown in Figures 51 and 53, the antenna signal line 41 is electrically connected to the antenna electrode 40 through a via hole passing through the second touch insulation layer 702 and the first touch insulation layer 701; as shown in Figures 52 and 54, the antenna signal line 41 is electrically connected to the antenna electrode 40 through a via hole passing through the second touch insulation layer 702.

[0510] It should be noted that Figure 48 illustrates an example in which the touch signal line 3 includes a first portion 3-1 located on one side of the touch area 101 in the first direction Y, and at least part of the touch signal line 3 also includes a second portion 3-2 located in the touch area 101 and electrically connected to the first portion 3-1. The touch conductive layer may further include a connecting electrode electrically connected to the touch sub-electrodes. The touch insulating layer may further include a light extraction structure. The touch electrodes, touch signal lines, touch insulating layer, etc. may adopt the configurations described in the previous embodiments and in Figures 2 to 44, 46, and 47, and will not be further described here.

[0511] Alternatively, in some embodiments, the touch signal lines may also be arranged in the manner shown in FIG. 1 , that is, the touch signal lines 3 are located in the peripheral area 102 and do not pass through the touch area 101 .

[0512] In some embodiments, the orthographic projections of the antenna electrode, the antenna signal line, and the fourth dummy electrode on the base substrate also have a grid structure.

[0513] The present disclosure provides a touch display panel, as shown in FIG55 to FIG59 , including:

[0514] The base substrate 1 includes a touch area 101 and a peripheral area 102 surrounding the touch area 101;

[0515] The touch layer 37 is located on one side of the base substrate 1; the touch layer 37 includes: a multi-layer touch conductive layer 4 and a multi-layer touch insulating layer 7, at least part of the touch insulating layer 7 is located between two adjacent touch conductive layers 4; the touch conductive layer 4 includes: a plurality of touch electrodes 2; the touch layer 37 also includes a plurality of pressure sensors 44 located in the touch area 101, and a plurality of pressure-sensing signal lines 45; the pressure sensors 44 include: a first electrode 4401 located on a different layer from the first electrode 4401, a second electrode 4402 located on a different layer from the first electrode 4401, and a pressure-sensing layer 4403 located between the first electrode 4401 and the second electrode 4402; the pressure-sensing signal line 45 includes: a first pressure-sensing signal line 4501 electrically connected to the first electrode 4401, and a second pressure-sensing signal line 4502 electrically connected to the second electrode 4402; the touch conductive layer 4 includes the first electrode 4401, the second electrode 4402 and the pressure-sensing signal line 45, and the touch insulating layer 7 includes the pressure-sensing layer 4403.

[0516] It should be noted that FIG. 56 to FIG. 59 are cross-sectional views along line ZZ′ in FIG. 55 .

[0517] The touch display panel provided by the disclosed embodiments also includes pressure sensors and pressure-sensitive signal lines, which can expand the application scenarios of the touch display panel. Furthermore, the pressure sensors and pressure-sensitive signal lines are disposed on the touch layer. This allows the pressure sensor and pressure-sensitive signal line patterns to be formed simultaneously with the touch layer pattern, thus streamlining the process and reducing costs.

[0518] In some embodiments, as shown in FIG55 , the plurality of touch electrodes 2 include:

[0519] A plurality of first touch electrodes 201 extending along the second direction X and arranged along the first direction Y; the first touch electrodes 201 include a plurality of first sub-electrodes 2011 arranged along the second direction X;

[0520] The second touch electrodes 202 are arranged along the second direction X and extend along the first direction Y. The second touch electrodes 202 include: a plurality of second sub-electrodes 2021 arranged along the first direction Y, and a bridging electrode 2022 electrically connecting two adjacent second sub-electrodes 2021 .

[0521] In some embodiments, as shown in FIG. 56 to FIG. 59 , the multi-layer touch conductive layer 4 includes:

[0522] The first touch conductive layer 401 includes a bridge electrode 2022 ;

[0523] The second touch conductive layer 402 is located on a side of the first touch conductive layer 401 away from the base substrate 1 ; the second touch conductive layer 402 includes a first sub-electrode 2011 and a second sub-electrode 2021 ;

[0524] The third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 , or located on a side of the second touch conductive layer 402 facing away from the base substrate 1 ; the third touch conductive layer 403 includes a portion of the pressure sensor 44 .

[0525] Specifically, in FIG56 and FIG59 , the third touch conductive layer 403 is located between the first touch conductive layer 401 and the base substrate 1 ; in FIG57 and FIG58 , the third touch conductive layer 403 is located on the side of the second touch conductive layer 402 away from the base substrate 1 .

[0526] In some embodiments, as shown in Figures 56 to 59, the multi-layer touch insulation layer 7 includes: a first touch insulation layer 701, and a second touch insulation layer 702 located on the side of the first touch insulation layer 701 facing away from the base substrate 1; in Figures 56 and 59, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the third touch conductive layer 403, and the second touch insulation layer 702 is located between the first touch conductive layer 401 and the second touch conductive layer 402; in Figures 57 and 58, the first touch insulation layer 701 is located between the first touch conductive layer 401 and the second touch conductive layer 402, and the second touch insulation layer 702 is located between the third touch conductive layer 403 and the second touch conductive layer 402.

[0527] In some embodiments, as shown in FIG. 56 to FIG 59 , at least two of the first touch conductive layer 401 , the second touch conductive layer 402 , and the third touch conductive layer 403 include a first electrode 4401 , a second electrode 4402 , and a pressure-sensing signal line 45 .

[0528] In some embodiments, in the touch area, as shown in FIG56 and FIG57 , the first pressure-sensing signal line 4501 is located in the first touch conductive layer 401 , the first electrode 4401 is located in the second touch conductive layer 402 , and the second electrode 4402 and the second pressure-sensing signal line (not shown) are located in the third touch conductive layer 403 ;

[0529] The touch insulating layer 7 between the second touch conductive layer 402 and the third touch conductive layer 403 includes a pressure-sensitive layer 4403 .

[0530] In the touch display panel provided by the embodiment of the present disclosure, the second pressure-sensing signal line and the second electrode are arranged on the same layer, so that the two can be directly electrically connected without going through a via. This can reduce the difficulty of designing and manufacturing the pressure sensor and the pressure-sensing signal line when the pressure sensor is integrated with the touch layer, save process flow, and reduce costs.

[0531] Specifically, in Figure 56, the second touch insulation layer 702 and the first touch insulation layer 701 include a pressure-sensitive layer 4403, and the first electrode 4401 is electrically connected to the first pressure-sensitive signal line 4501 through a via 46 passing through the second touch insulation layer 702; in Figure 57, the second touch insulation layer 702 includes a pressure-sensitive layer 4403, and the first electrode 4401 is electrically connected to the first pressure-sensitive signal line 4501 through a via 46 passing through the first touch insulation layer 701.

[0532] Alternatively, in some embodiments, in the touch area, as shown in FIG58 , the first pressure-sensing signal line (not shown) and the first electrode 4401 are located in the first touch conductive layer 401 , the second electrode 4402 is located in the second touch conductive layer 402 , and the second pressure-sensing signal line 4502 is located in the third touch conductive layer 403 ;

[0533] The touch insulating layer 7 between the second touch conductive layer 402 and the first touch conductive layer 401 includes a pressure-sensitive layer 4403 .

[0534] Specifically, in FIG. 58 , the first touch insulating layer 701 includes a pressure sensing layer 4403 , and the second pressure sensing signal line 4502 is electrically connected to the second electrode 4402 through a via hole 37 penetrating the second touch insulating layer 702 .

[0535] In the touch display panel provided by the embodiment of the present disclosure, the first pressure-sensing signal line and the first electrode are arranged on the same layer, so that the two can be directly electrically connected without going through a via. This can reduce the difficulty of designing and manufacturing the pressure sensor and the pressure-sensing signal line when the pressure sensor is integrated with the touch layer, save process flow, and reduce costs.

[0536] Alternatively, in some embodiments, in the touch area, as shown in FIG59 and FIG60 , the first pressure-sensing signal line (not shown) and the first electrode 4401 are located in the first touch conductive layer 401 , and the second electrode 4402 and the second pressure-sensing signal line (not shown) are located in the third touch conductive layer 403 ;

[0537] The touch insulating layer 7 between the third touch conductive layer 403 and the first touch conductive layer 401 includes a pressure-sensitive layer 4403 .

[0538] In the touch display panel provided by the embodiment of the present disclosure, the first pressure-sensing signal line is arranged on the same layer as the first electrode, so that the two can be directly electrically connected without going through a via hole. The second pressure-sensing signal line is arranged on the same layer as the second electrode, so that the two can be directly electrically connected without going through a via hole. When the pressure sensor is integrated with the touch layer, the design and production difficulty of the pressure sensor and the pressure-sensing signal line can be reduced, the process flow can be saved, and the cost can be reduced.

[0539] In some embodiments, as shown in FIG55 , the center of the orthographic projection of at least a portion of the first electrode 4401 and at least a portion of the second electrode (not shown) on the substrate 1 coincides with the center of the orthographic projection of the first sub-electrode 2011 or the second sub-electrode 2021 on the substrate 1. FIG55 illustrates an example in which the center of the orthographic projection of the first electrode 4401 and at least a portion of the second electrode (not shown) on the substrate 1 coincides with the center of the orthographic projection of the second sub-electrode 2021 on the substrate 1.

[0540] In some embodiments, as shown in Figure 55, the edge of the positive projection of a portion of the first electrode 4401 (the triangular first electrode 4401 in Figure 55) and at least a portion of the second electrode (not shown) on the base substrate 1 is located in the same straight line as the edge of the positive projection of the touch electrode 2 on the base substrate 1.

[0541] In a specific implementation, when the first electrode or the second electrode and the sub-electrode are provided in the same layer, the orthographic projections of part of the first electrode and the second electrode on the base substrate are surrounded by the orthographic projections of the first sub-electrode or the second sub-electrode on the base substrate.

[0542] Alternatively, in some embodiments, the orthographic projections of the first and second electrodes on the substrate are located between adjacent touch electrodes within the orthographic projections of the substrate. That is, the first and second electrodes do not overlap with the touch electrodes, thereby preventing interference between the touch electrodes and the pressure sensor.

[0543] In some embodiments, the multi-layer touch conductive layer further includes a plurality of touch signal lines.

[0544] In some embodiments, the touch signal lines are arranged as shown in FIG. 1 , that is, the touch signal lines 3 are located in the peripheral area 102 .

[0545] Alternatively, in some embodiments, the touch signal line includes a first portion located on one side of the touch area in the first direction Y, and at least part of the touch signal line also includes: a second portion located in the touch area 101 and electrically connected to the first portion; as shown in Figures 56 to 59, the third touch conductive layer 403 also includes a second portion 3-2.

[0546] In a specific implementation, the touch conductive layer may further include a connection electrode electrically connected to the touch sub-electrodes. The touch insulating layer may further include a light extraction structure. The touch electrodes, touch signal lines, touch insulating layer, etc. may be arranged, for example, as described in the previous embodiments and in Figures 2 to 44, 46, and 47, and will not be further described here.

[0547] In a specific implementation, the orthographic projection of the first electrode, the second electrode, the first pressure-sensing signal line, and the second pressure-sensing signal line on the base substrate also has a grid structure.

[0548] A display device includes the touch display panel provided by an embodiment of the present disclosure.

[0549] The display device provided in the embodiments of the present disclosure is any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. Other essential components of the display device are readily understood by those skilled in the art and are not described here in detail, nor should they be construed as limitations of the present disclosure. The implementation of the display device can be referenced to the aforementioned embodiments of the touch display panel, and any repetitive details will not be repeated.

[0550] In summary, the touch display panel, or display device, provided by the embodiments of the present disclosure arranges a second portion of the touch signal lines, outside the first portion, in the touch area. This eliminates the need for the second portion to be arranged in the peripheral area, thereby reducing the size of at least a portion of the peripheral area and achieving an extremely narrow bezel. Furthermore, because the second portion arranged in the touch area and the touch electrodes are located on a different film layer, interference with the touch electrodes by the second portion can be reduced, thereby preventing a decrease in touch accuracy.

[0551] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0552] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such changes and modifications of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A touch display panel, wherein: The touch display panel includes: The base substrate comprises: a touch area and a peripheral area surrounding the touch area; A plurality of touch electrodes are located on one side of the base substrate in the touch area; a plurality of touch signal lines located on the same side of the substrate as the touch electrodes; the touch signal lines being electrically connected to the touch electrodes; the touch signal lines comprising a first portion located on one side of the touch area in a first direction; and at least some of the touch signal lines further comprising a second portion located in the touch area and electrically connected to the first portion, the second portion being located in a different film layer from the touch electrodes; The touch display panel includes: a multi-layer touch conductive layer, including: a first touch conductive layer; the first touch conductive layer includes a portion of the plurality of touch electrodes; a second touch conductive layer, located on a side of the first touch conductive layer facing away from the base substrate; the second touch conductive layer includes the remaining portions of the plurality of touch electrodes; The third touch conductive layer is located between the first touch conductive layer and the base substrate, or located on a side of the second touch conductive layer away from the base substrate; the third touch conductive layer includes the second portion.

2. The touch display panel according to claim 1, wherein: The plurality of touch electrodes include: a plurality of first touch electrodes extending along the second direction and arranged along the first direction; the first touch electrodes include a plurality of first sub-electrodes arranged along the second direction, and the second direction intersects the first direction; a plurality of second touch electrodes arranged along the second direction and extending along the first direction; the second touch electrodes comprising: a plurality of second sub-electrodes arranged along the first direction, and a bridging electrode electrically connecting two adjacent second sub-electrodes; Wherein, the first touch conductive layer includes the bridge electrode, and the second touch conductive layer includes the first sub-electrode and the second sub-electrode; The plurality of touch signal lines include: a plurality of first touch signal lines; the first touch electrode is electrically connected to at least one of the first touch signal lines, and the first touch signal line includes the second portion; A plurality of second touch signal lines; the second touch electrode is electrically connected to at least one of the second touch signal lines.

3. The touch display panel according to claim 1 or 2, wherein: The second portion of the first touch signal line includes: a first sub-portion extending along the first direction and electrically connected to the first portion; At least part of the second portion of the first touch signal line further includes: a second sub-portion extending along the second direction and electrically connected to the first sub-portion and the touch electrode; The orthographic projection of the second sub-portion on the base substrate overlaps with the orthographic projections of the first touch electrode and the bridge electrode on the base substrate, and the orthographic projection of the second sub-portion on the base substrate does not overlap with the orthographic projection of the second sub-electrode on the base substrate.

4. The touch display panel according to claim 3, wherein: The orthographic projection of the first sub-portion on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate, and the orthographic projection of the first sub-portion on the base substrate does not overlap with the orthographic projection of the second touch electrode on the base substrate; The orthographic projection of the first sub-portion on the base substrate falls within a region between the orthographic projections of two adjacent second touch electrodes on the base substrate.

5. The touch display panel according to claim 3, wherein: An orthographic projection of the first sub-portion on the substrate overlaps with an orthographic projection of the first sub-electrode on the substrate; At least a portion of the orthographic projection of the first sub-portion on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate; The total area S1 of the overlapping region of the orthographic projection of the first sub-portion on the base substrate and the orthographic projection of the second sub-electrode on the base substrate, and the area S2 of the orthographic projection of the first touch signal line on the base substrate satisfy the following ratio: S1 / S2≤10%; And / or, the length L1 of the overlapping area of ​​the orthographic projection of the first sub-portion on the base substrate and the orthographic projection of the second sub-electrode on the base substrate in the first direction and the length L2 of the orthographic projection of the first touch signal line on the base substrate satisfy: L1 / L2≤10%.

6. The touch display panel according to any one of claims 3 to 5, wherein: The second touch conductive layer further includes: a plurality of first dummy electrodes; the first dummy electrodes are insulated from the touch electrodes; The first dummy electrode is located between the first sub-electrodes of two adjacent different first touch electrodes, and the first dummy electrode is located between the second sub-electrodes of two adjacent different second touch electrodes; An orthographic projection of at least a portion of the first sub-portion on the base substrate overlaps with an orthographic projection of the first dummy electrode on the base substrate.

7. The touch display panel according to any one of claims 3 to 6, wherein: At least part of the second portion of the first touch signal line includes first width areas and second width areas arranged alternately. The orthographic projection of the first width region on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate; At least a portion of the second width region has an orthographic projection on the bottom substrate overlapping with an orthographic projection of the bridge electrode on the base substrate; The orthographic projection of at least part of the second width region on the substrate falls within the orthographic projection of the region between two adjacent second sub-electrodes on the substrate, or the orthographic projection of at least part of the second width region on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate; The width of the first width region in a direction perpendicular to the extending direction thereof is greater than the width of the second width region in a direction perpendicular to the extending direction thereof.

8. The touch display panel according to claim 7, wherein: In the first sub-portion, the orthographic projection of the first width region on the substrate falls within the orthographic projection of the first sub-electrode on the substrate; the orthographic projection of the second width region on the substrate falls within the orthographic projection of the region between two adjacent second sub-electrodes on the substrate, or the orthographic projection of the second width region on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate; In the second sub-portion, the orthographic projection of the first width region on the substrate falls within the orthographic projection of the first sub-electrode on the substrate, and the orthographic projection of the second width region on the substrate overlaps with the orthographic projection of the bridge electrode on the substrate.

9. The touch display panel according to claim 8, wherein: In the touch area, the pattern of the orthographic projection of the touch signal line on the base substrate includes a plurality of grids; The number of the grids included in the second width region in a direction perpendicular to the extension direction is smaller than the number of the grids included in the first width region in the direction perpendicular to the extension direction.

10. The touch display panel according to claim 8, wherein: The second width region pattern is linear.

11. The touch display panel according to any one of claims 3 to 10, wherein: One end of the second sub-portion away from the first sub-portion is electrically connected to one end of the first touch electrode.

12. The touch display panel according to any one of claims 3 to 11, wherein: The plurality of first touch signal lines are divided into n first touch signal line groups; n is a positive integer; The first touch signal lines in the first touch signal line group correspond one-to-one to the first touch electrodes; In each of the first touch signal line groups, the first sub-portions of a plurality of the first touch signal lines are sequentially arranged along the second direction, and the second sub-portions of a plurality of the first touch signal lines are sequentially arranged along the first direction.

13. The touch display panel according to claim 12, wherein: In the direction from the second sub-portion to the first sub-portion, the length of the first sub-portion in the first touch signal line group in the first direction gradually increases; In a direction in which the touch area moves away from the first portion, a length of the second sub-portion in the first touch signal line group in the second direction gradually increases.

14. The touch display panel according to claim 12 or 13, wherein: The first sub-portions and / or the second sub-portions of the remaining second portion, except for the second portion electrically connected to the first touch electrode farthest from the first portion, include a first compensation portion; The first compensation portion extends in a broken line; Of the two first touch signal lines in the first touch signal line group, the first touch signal line electrically connected to the first touch electrode closer to the first portion includes a greater number of the first compensation portions than the first touch signal line electrically connected to the first touch electrode farther from the first portion. Among the two first touch signal lines of the first touch signal line group, the total length of the first compensation portion included in the first touch signal line electrically connected to the first touch electrode closer to the first portion is greater than the total length of the first compensation portion included in the first touch signal line electrically connected to the first touch electrode farther from the first portion; The orthographic projection of the first compensation portion on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate.

15. The touch display panel according to claim 12 or 13, wherein: In a direction in which the touch area moves away from the first portion, the line width of the second portion in the first touch signal line group increases gradually in a direction perpendicular to the extending direction thereof.

16. The touch display panel according to claim 12 or 13, wherein: The second portion of at least some of the first touch signal lines includes at least one second compensation portion; The width of the second compensation portion in the direction perpendicular to the extension direction is greater than the width of the remaining area of ​​the second portion in the direction perpendicular to the extension direction; Of the two first touch signal lines in the first touch signal line group, the first touch signal line electrically connected to the first touch electrode closer to the first portion includes a smaller number of second compensation portions than the first touch signal line electrically connected to the first touch electrode farther from the first portion. The orthographic projection of the second compensation portion on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate.

17. The touch display panel according to claim 16, wherein: The second compensation portions in different first touch signal lines have the same width in a direction perpendicular to the extension direction.

18. The touch display panel according to claim 16, wherein: Among the two first touch signal lines of the first touch signal line group, the width of the second compensation portion included in the first touch signal line electrically connected to the first touch electrode closer to the first part is smaller than the width of the second compensation portion included in the first touch signal line electrically connected to the first touch electrode farther away from the first part.

19. The touch display panel according to any one of claims 3 to 18, wherein: The second touch signal lines are electrically connected to the second touch electrodes in a one-to-one correspondence, and the second touch signal lines only include the first portion.

20. The touch display panel according to any one of claims 3 to 18, wherein: The plurality of second touch signal lines include: a plurality of first-type second touch signal lines and a plurality of second-type second touch signal lines; The first-type second touch signal lines only include the first portion, and the first-type second touch signal lines are electrically connected to the second touch electrodes in a one-to-one correspondence; The second type of second touch signal line includes the first part and the second part, the second type of second touch signal line is electrically connected to the second touch electrodes in a one-to-one correspondence, and the second part of the second type of second touch signal line is electrically connected to the second sub-electrode farthest from the first part among the second touch electrodes.

21. The touch display panel according to claim 20, wherein: The plurality of first touch signal lines are divided into two first touch signal line groups, and the plurality of second-type second touch signal lines are located between the two first touch signal line groups.

22. The touch display panel according to claim 20 or 21, wherein: The second portion of the second touch signal line of the second type includes: a third sub-portion extending along the first direction and electrically connected to the first portion; At least part of the second portion of the second touch signal line of the second type further includes: a fourth sub-portion extending along the second direction and electrically connected to the third sub-portion and the second touch electrode; The orthographic projection of the fourth sub-portion on the substrate overlaps with the orthographic projections of the second sub-electrode and the first sub-electrode on the substrate; The orthographic projection of the third sub-portion on the base substrate overlaps with the orthographic projections of the second sub-electrode and the bridging electrode on the base substrate, and the orthographic projection of the third sub-portion on the base substrate does not overlap with the orthographic projection of the second touch electrode on the base substrate.

23. The touch display panel according to claim 22, wherein: The total area S3 of the overlapping region of the orthographic projection of the second portion of the second-type second touch signal line on the base substrate and the orthographic projection of the first touch electrode on the base substrate, and the area S4 of the orthographic projection of the second portion of the second-type second touch signal line on the base substrate satisfy the following ratio: S3 / S4≤10%; and / or, A length L3 in the first direction of an overlapping area between an orthographic projection of the second portion of the second-type second touch signal line on the base substrate and an orthographic projection of the first touch electrode on the base substrate, and a length L4 of an orthographic projection of the second portion of the second-type second touch signal line on the base substrate satisfy the following conditions: L3 / L4≤10%.

24. The touch display panel according to claim 22 or 23, wherein: The second portion of at least some of the second-type second touch signal lines includes a third width region and a fourth width region; The third width area and the fourth width area are arranged alternately; The orthographic projection of the third width region on the substrate overlaps with the orthographic projection of the first sub-electrode on the substrate, and the orthographic projection of the third width region on the substrate does not overlap with the orthographic projection of the second sub-electrode on the substrate, and the orthographic projection of the fourth width region on the substrate overlaps with the orthographic projection of the second sub-electrode on the substrate; The width of the third width region in a direction perpendicular to the extension direction is greater than the width of the fourth width region in a direction perpendicular to the extension direction; In the touch area, the pattern of the orthographic projection of the touch signal line on the base substrate includes a plurality of grids; the number of grids included in the fourth width area in a direction perpendicular to the extension direction is smaller than the number of grids included in the third width area in a direction perpendicular to the extension direction; or, The orthographic projection pattern of the third width region on the base substrate includes a plurality of grids; the orthographic projection pattern of the fourth width region on the base substrate is linear.

25. The touch display panel according to any one of claims 20 to 24, wherein: The third touch conductive layer further includes: a first shielding signal line located between the second portion of the first touch signal line and the second portion of the second type of second touch signal line; The first shielding signal line includes: a third portion extending from the touch area to the peripheral area along the first direction, and a fourth portion extending along the second direction and electrically connected to the third portion; In the second direction, the third portion is located between the first sub-portion and the third sub-portion; in the first direction, the fourth portion is located between the second sub-portion and the fourth sub-portion.

26. The touch display panel according to any one of claims 1 to 25, wherein: The third touch conductive layer further includes: a plurality of second dummy electrodes; The second dummy electrode and the second portion are spaced apart and insulated from each other.

27. The touch display panel according to any one of claims 1 to 26, wherein: The third touch conductive layer is located between the base substrate and the first touch conductive layer, and the first touch conductive layer further includes: a plurality of first connecting electrodes; the first connecting electrodes are electrically connected to the second portion; The orthographic projection of the first connecting electrode on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate, and the orthographic projection of the first connecting electrode on the base substrate does not overlap with the orthographic projection of the second sub-electrode on the base substrate; or, Part of the orthographic projection of the first connecting electrode on the base substrate falls within the orthographic projection of the first sub-electrode on the base substrate; part of the orthographic projection of the first connecting electrode on the base substrate overlaps with the orthographic projection of the first sub-electrode on the base substrate and the orthographic projection of the second sub-electrode on the base substrate.

28. The touch display panel according to claim 27, wherein: The first touch conductive layer further includes a third dummy electrode located between the first connecting electrode and the bridging electrode.

29. The touch display panel according to any one of claims 1 to 25, 27 to 28, wherein: The third touch conductive layer further includes: a plurality of second connecting electrodes and a plurality of third connecting electrodes; The second connecting electrode is electrically connected to the first touch electrode, and the third connecting electrode is electrically connected to the second touch electrode.

30. The touch display panel according to any one of claims 1 to 26 and 29, wherein: The touch display panel further includes: a multi-layer touch insulating layer; at least a portion of the touch insulating layer is located between two adjacent touch conductive layers; The third touch conductive layer is located on a side of the second touch conductive layer facing away from the base substrate, and a thickness of the touch insulating layer between the third touch conductive layer and the second touch conductive layer is greater than a thickness of the touch insulating layer between the first touch conductive layer and the second touch conductive layer.

31. The touch display panel according to any one of claims 1 to 30, wherein: The first part includes a plurality of sub-signal lines arranged in a stacked manner; The multi-layer sub-signal line includes a first sub-signal line, a second sub-signal line, and a third sub-signal line arranged in sequence on one side of the base substrate; the first sub-signal line, the second sub-signal line, and the third sub-signal line are respectively located in three layers of the touch conductive layer.

32. The touch display panel according to claim 31, wherein: At least part of the first portion includes a fifth sub-portion extending along the second direction, and a sixth sub-portion extending along the first direction; The touch display panel further includes: a first touch insulating layer located between the first sub-signal line and the second sub-signal line, and a second touch insulating layer located between the second sub-signal line and the third sub-signal line; At least a portion of the sixth sub-portion includes the first sub-signal line, the second sub-signal line, and the third sub-signal line, and in the sixth sub-portion, the second sub-signal line is electrically connected to the first sub-signal line through a first via hole penetrating the first touch insulation layer, and the third sub-signal line is electrically connected to the second sub-signal line through a second via hole penetrating the second touch insulation layer; The orthographic projection of the first via hole on the base substrate and the orthographic projection of the second via hole on the base substrate do not overlap with each other.

33. The touch display panel according to claim 32, wherein: The fifth sub-portion includes one of the first sub-signal line, the second sub-signal line, and the third sub-signal line; The fifth sub-portions located at different layers have overlapping orthographic projections on the substrate.

34. The touch display panel according to any one of claims 1 to 33, wherein: The touch display panel further includes: a retaining wall located in the peripheral area; The orthographic projection of the first part on the substrate overlaps with the orthographic projection of the retaining wall on the substrate, and in the area where the orthographic projection of the first part on the substrate overlaps with the orthographic projection of the retaining wall on the substrate, the first part includes 1 layer or 2 layers of the sub-signal lines.

35. The touch display panel according to any one of claims 1 to 34, wherein: The peripheral area includes a first peripheral area located on one side of the touch area in the first direction, and the first portion is located in the first peripheral area; The first peripheral region includes a bending region extending along the second direction; The orthographic projection of the first portion on the base substrate overlaps with the bending region, and in the bending region, the first portion includes only one layer of the sub-signal line; The multi-layer sub-signal line further includes: a fourth sub-signal line located between the first sub-signal line and the base substrate; The orthographic projection of the fourth sub-signal line on the base substrate passes through the bending area, and the orthographic projections of the first sub-signal line, the second sub-signal line, and the third sub-signal line on the base substrate do not overlap with the bending area; In an area outside the bending region, the fourth sub-signal line is electrically connected to one of the first sub-signal line, the second sub-signal line, and the third sub-signal line.

36. The touch display panel according to any one of claims 1 to 35, wherein: The touch display panel comprises: a plurality of light emitting units located in the touch area; the plurality of light emitting units are located between the base substrate and the touch conductive layer; In the touch area, the pattern of the orthographic projection of the first touch conductive layer, the second touch conductive layer, and the third touch conductive layer on the base substrate includes multiple grids; each of the grids corresponds to at least one light-emitting unit, and the orthographic projection of the light-emitting area of ​​the light-emitting unit on the base substrate falls within the orthographic projection of the grid on the base substrate.

37. The touch display panel according to claim 36, wherein: The touch display panel further includes a plurality of light extraction structures; the light extraction structure includes a first substructure and a second substructure located on a side of the first substructure away from the base substrate; The first substructure includes an opening, wherein an orthographic projection of the opening on the base substrate covers an orthographic projection of the light-emitting area on the base substrate, and the first substructure includes an inclined side surface at the opening, and the second substructure covers the opening and the inclined side surface, and the refractive index of the first substructure is less than the refractive index of the second substructure; The touch display panel further includes: a multi-layer touch insulating layer; among the multi-layer touch insulating layer, some of the touch insulating layers are located between adjacent touch conductive layers; some of the touch insulating layers are located on a side of the touch conductive layer farthest from the base substrate and facing away from the base substrate, and / or some of the touch insulating layers are located between the touch conductive layer closest to the base substrate and the base substrate; At least one touch insulation layer among the multiple touch insulation layers includes the first substructure, and another touch insulation layer located on a side of the touch insulation layer facing away from the base substrate and adjacent to the touch insulation layer includes the second substructure.

38. The touch display panel according to claim 37, wherein: The multi-layer touch insulation layer includes: a first touch insulation layer, a second touch insulation layer, a third touch insulation layer and a fourth touch insulation layer; The third touch insulating layer is located on a side of the touch conductive layer that is farthest from the base substrate and faces away from the base substrate, and the fourth touch insulating layer is located on a side of the third touch insulating layer that faces away from the base substrate; The first touch insulating layer includes a plurality of first openings located in the touch area, wherein the orthographic projections of the first openings on the base substrate cover the orthographic projections of the light-emitting area on the base substrate, and the orthographic projections of the first openings on the base substrate do not overlap with the orthographic projections of the touch signal lines and the touch electrodes on the base substrate; In the first opening, the first touch insulating layer has a first inclined side surface, and the second touch insulating layer covers the first inclined side surface and the first opening; The refractive index of the second touch insulating layer is greater than the refractive index of the first touch insulating layer; The third touch insulating layer includes a plurality of second openings located in the touch area, wherein the orthographic projections of the second openings on the base substrate cover the orthographic projections of the light-emitting area on the base substrate, and the orthographic projections of the second openings on the base substrate do not overlap with the orthographic projections of the touch signal lines and the touch electrodes on the base substrate; In the second opening, the third touch insulating layer has a second inclined side surface, and the fourth touch insulating layer covers the second inclined side surface and the second opening; The refractive index of the fourth touch insulation layer is greater than the refractive index of the third touch insulation layer.

39. The touch display panel according to any one of claims 1 to 38, wherein: The touch display panel further includes: a plurality of antenna electrodes located in the touch area, and antenna signal lines electrically connected to the plurality of antenna electrodes; The antenna electrode is located at an edge of the touch area away from the first portion; The antenna signal line includes: a fifth portion located in the peripheral area, and a sixth portion located in the touch area; The orthographic projection of the sixth portion on the base substrate overlaps with the edge of the touch area; The antenna electrode and the antenna signal line are located in the third touch conductive layer; The antenna electrode is located on the second touch conductive layer, and the antenna signal line is located on the third touch conductive layer; The second touch conductive layer further includes: a fourth dummy electrode located between the touch electrode and the antenna electrode.

40. The touch display panel according to any one of claims 1 to 39, wherein: The touch display panel further includes: a plurality of pressure sensors located in the touch area, and a plurality of pressure-sensing signal lines; The pressure sensor includes: a first electrode, a second electrode located in a different layer from the first electrode, and a pressure-sensitive layer located between the first electrode and the second electrode; The pressure-sensing signal line includes: a first pressure-sensing signal line electrically connected to the first electrode, and a second pressure-sensing signal line electrically connected to the second electrode; At least two layers among the first touch conductive layer, the second touch conductive layer, and the third touch conductive layer include the first electrode, the second electrode, and the pressure-sensing signal line.

41. The touch display panel according to claim 40, wherein: The touch display panel further includes: a multi-layer touch insulating layer; at least a portion of the touch insulating layer is located between two adjacent touch conductive layers; In the touch area, the first pressure-sensing signal line is located in the first touch conductive layer, the first electrode is located in the second touch conductive layer, and the second electrode and the second pressure-sensing signal line are located in the third touch conductive layer; the touch insulating layer between the second touch conductive layer and the third touch conductive layer includes the pressure-sensing layer; or In the touch area, the first pressure-sensing signal line and the first electrode are located in the first touch conductive layer, the second electrode is located in the second touch conductive layer, and the second pressure-sensing signal line is located in the third touch conductive layer; the touch insulating layer between the second touch conductive layer and the first touch conductive layer includes the pressure-sensing layer; or In the touch area, the first pressure-sensing signal line and the first electrode are located in the first touch conductive layer, and the second electrode and the second pressure-sensing signal line are located in the third touch conductive layer; the touch insulating layer between the third touch conductive layer and the first touch conductive layer includes the pressure-sensing layer.

42. The touch display panel according to claim 40 or 41, wherein: The center of the orthographic projection of at least a portion of the first electrode and at least a portion of the second electrode on the substrate coincides with the center of the orthographic projection of the first sub-electrode or the second sub-electrode on the substrate; or, The orthographic projections of the first electrode and the second electrode on the base substrate are located in a region between adjacent touch electrodes within the orthographic projection of the base substrate.

43. A display device, wherein: It comprises the touch display panel according to any one of claims 1 to 42.

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