Touch display panel, display device

Abstract

The present disclosure provides a touch display panel and a display device, belonging to the field of display technology. The touch display panel includes a substrate and a touch layer. The touch layer includes a plurality of touch electrodes and a plurality of touch traces. The touch traces include at least one first extension section extending along a second direction, the second direction intersecting with the first direction. The first extension sections are distributed in at least two conductive layers and the first extension sections in different conductive layers are connected by vias. The line width of the area of the first extension section provided with vias is greater than the line width of the area of the first extension section not provided with vias. The present disclosure helps to achieve a narrower bezel design.

Description

Technical Field

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

[0002] With the continuous improvement of consumers' pursuit of screen sensory experience and the continuous progress of display industry technologies, users have higher and higher requirements for the display quality of display products and the overall appearance of the whole machine. The ultra-narrow bezel design, that is, the bezel of the display screen is relatively narrow, can give users a better use experience. At present, the bezel of the display screen is relatively wide, and further narrowing design needs to be done.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure, and thus it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a touch display panel and a display device, which helps to achieve a narrower bezel design.

[0005] To achieve the above invention purpose, the present disclosure adopts the following technical solutions:

[0006] According to the first aspect of the present disclosure, there is provided a touch display panel, characterized in that it includes:

[0007] A substrate, including a touch area, a first wiring area, and a bonding area, the bonding area is located on one side of the touch area in a first direction, and the first wiring area is located between the touch area and the bonding area;

[0008] A touch layer, provided on one side of the substrate, the touch layer includes at least two conductive layers stacked and a first insulating layer provided between adjacent two conductive layers, the touch layer further includes a plurality of touch electrodes and a plurality of touch wirings, the touch electrodes are distributed on the conductive layers and are located in the touch area, one end of the touch wiring is connected to the touch electrode, and the other end extends to the bonding area, at least part of the touch wiring is located in the first wiring area and the touch wiring is distributed on at least two conductive layers, and the orthographic projections of the touch wirings distributed on different conductive layers on the substrate at least partially overlap;

[0009] Wherein, the touch wiring includes at least one first extension section extending in a second direction, the second direction intersects with the first direction, the first extension section is distributed on at least two conductive layers and the first extension sections distributed on different conductive layers are connected through vias in the first insulating layer, and the line width of the area of the first extension section provided with vias is greater than the line width of the area of the first extension section not provided with vias.

[0010] In an exemplary embodiment of the present disclosure, the at least one first extension segment includes a first electrode connection segment, and the first electrode connection segment is in contact connection with the touch electrode;

[0011] The first electrode connection segment includes at least one first via region and at least one first connection region connected to each other. The first via region is provided with vias, and the line width of the first via region is greater than the line width of the first connection region.

[0012] In an exemplary embodiment of the present disclosure, both the first via region and the first connection region have a first side close to the touch electrode and a second side far from the touch electrode, and the second sides of the first via region and the first connection region are flush.

[0013] In an exemplary embodiment of the present disclosure, the distance between the outer boundary of the first via region and the via hole edge in the first via region is not less than 2.5 μm.

[0014] In an exemplary embodiment of the present disclosure, the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes, and the plurality of first touch electrodes and the plurality of second touch electrodes are arranged in an alternating array;

[0015] The plurality of first touch electrodes are arranged along the first direction and connected to each other to form a first electrode group, and the plurality of second touch electrodes are arranged along the second direction and connected to each other to form a second electrode group;

[0016] The touch trace is in contact connection with the first touch electrode group through the first electrode connection segment.

[0017] In an exemplary embodiment of the present disclosure, the at least one first extension segment includes at least one first guiding segment, the first guiding segment is located in the first trace region and the first guiding segment is not in direct contact with the touch electrode;

[0018] The first guiding segment includes at least one second via region and at least one second connection region connected to each other. The second via region is provided with vias, and the line width of the second via region is greater than the line width of the second connection region.

[0019] In an exemplary embodiment of the present disclosure, the first guiding segments of different touch traces are arranged at intervals along the first direction, and the second via regions of the first guiding segments of adjacent two touch traces are arranged in a staggered manner.

[0020] In an exemplary embodiment of the present disclosure, the at least two conductive layers include a first conductive layer and a second conductive layer, and the second conductive layer is disposed on a side of the first conductive layer away from the substrate;

[0021] The first guiding segment includes a first sub-segment and a second sub-segment which are arranged at intervals and connected in sequence. The first sub-segment is distributed on the first conductive layer, and the second sub-segment is distributed on the second conductive layer;

[0022] Both the first sub-segment and the second sub-segment have the second via region and the second connection region;

[0023] The positive projection of the second via region of the first sub-segment and the positive projection of the second via region of the adjacent second sub-segment on the substrate at least partially overlap, and the positive projections of the second connection region of the first sub-segment and the second connection region of the second sub-segment on the substrate do not overlap.

[0024] In an exemplary embodiment of the present disclosure, the at least two conductive layers include a first conductive layer and a second conductive layer, and the second conductive layer is disposed on a side of the first conductive layer away from the substrate;

[0025] The first guiding segment includes a first sub-segment and a second sub-segment. The first sub-segment is distributed on the first conductive layer, and the second sub-segment is distributed on the second conductive layer;

[0026] Both the first sub-segment and the second sub-segment are continuous conductive wires;

[0027] The positive projections of the first sub-segment and the second sub-segment on the substrate at least partially overlap.

[0028] In an exemplary embodiment of the present disclosure, both the second via region and the second connection region have a first side close to the touch electrode and a second side away from the touch electrode;

[0029] There is a first distance between the first sides of the second via region and the second connection region, and there is a second distance between the second sides of the second via region and the second connection region. Both the first distance and the second distance are greater than 0, and the difference between the first distance and the second distance does not exceed 1 μm.

[0030] In an exemplary embodiment of the present disclosure, the distance between the outer boundary of the second via region and the via hole edge in the second via region is not less than 2.5 μm.

[0031] In an exemplary embodiment of the present disclosure, the touch trace further includes at least one second extension segment extending in a third direction. The second extension segment connects two adjacent first extension segments. The third direction is not parallel to the first direction and the third direction is not parallel to the second direction;

[0032] The second extension section is distributed in at least two layers of the conductive layer, and the second extension sections distributed in different conductive layers are connected by vias. The line width of the second extension section is greater than the line width of the area of the first extension section where no vias are provided.

[0033] In an exemplary embodiment of the present disclosure, the line width of the area of the first extension section where vias are provided is not less than 10 μm, and the line width of the area of the first extension section where no vias are provided is greater than or equal to 3 μm and less than 10 μm.

[0034] In an exemplary embodiment of the present disclosure, the substrate further includes a second wiring area, and the second wiring area is located on at least one side of the touch area in the second direction;

[0035] Wherein, the touch wiring further includes at least one third extension section extending along the first direction. The third extension section is distributed in at least two layers of the conductive layer, and the third extension sections distributed in different conductive layers are connected by vias. The line width of the area of the third extension section where vias are provided is greater than the line width of the area of the third extension section where no vias are provided.

[0036] In an exemplary embodiment of the present disclosure, the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes, and the plurality of first touch electrodes and the plurality of second touch electrodes are arranged in an alternating array;

[0037] The plurality of first touch electrodes are arranged along the first direction and connected to each other to form a first electrode group, and the plurality of second touch electrodes are arranged along the second direction and connected to each other to form a second electrode group;

[0038] The at least one third extension section includes a second electrode connection section. The second electrode connection section is located in the second wiring area, and the touch wiring is in contact connection with the second electrode group through the second electrode connection section;

[0039] The second electrode connection section includes at least one third via area and at least one third connection section connected to each other. The third via area is provided with vias, and the line width of the third via area is greater than the line width of the third connection section.

[0040] In an exemplary embodiment of the present disclosure, both the third via area and the third connection section have a first side close to the second electrode group and a second side far from the second electrode group, and the second sides of the third via area and the third connection section are flush.

[0041] In an exemplary embodiment of the present disclosure, the at least one third extension section includes at least one second guiding section. The second guiding section is located in the first wiring area or the second wiring area, and the second guiding section is not in direct contact with the touch electrode;

[0042] The second guiding section includes at least one fourth via area and at least one section of fourth connection area that are connected to each other. The fourth via area is provided with vias, and the line width of the fourth via area is greater than the line width of the fourth connection area;

[0043] The second guiding sections of different touch traces are arranged at intervals along the second direction, and the fourth via areas of the second guiding sections of two adjacent touch traces are arranged in a staggered manner.

[0044] In an exemplary embodiment of the present disclosure, the touch electrode is in a grid shape.

[0045] In an exemplary embodiment of the present disclosure, the touch display panel further includes a driving circuit layer, a light-emitting layer, and a packaging layer disposed between the substrate and the touch layer;

[0046] The driving circuit layer includes a plurality of pixel circuits. The light-emitting layer is disposed on a side of the driving circuit layer away from the substrate. The light-emitting layer includes a plurality of light-emitting devices, and the pixel circuits are used to drive the light-emitting devices to emit light in a one-to-one correspondence;

[0047] The packaging layer covers a side of the light-emitting layer away from the substrate.

[0048] According to a second aspect of the present disclosure, there is provided a display device including the touch display panel as described in the first aspect.

[0049] In the touch display panel provided by the present disclosure, the first extension sections of the touch traces are distributed in at least two conductive layers and the first extension sections distributed in different conductive layers are connected by vias. The line width of the area of the first extension section provided with vias is greater than the line width of the area of the first extension section not provided with vias. In this way, it helps to reduce the occupied space of the touch traces in the first trace area and achieve a narrower bezel design for the touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] By referring to the drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present disclosure will become more apparent.

[0051] Figure 1 It is a schematic structural diagram of a substrate in an exemplary embodiment of the present disclosure;

[0052] Figure 2 It is a schematic plan view of a touch display panel in an exemplary embodiment of the present disclosure;

[0053] Figure 3 It is Figure 2 a schematic structural diagram of the touch traces in area A in

[0054] Figure 4 It isFigure 3 Cross-sectional view of A1 - A2 in

[0055] Figure 5 is Figure 2 Schematic diagram of the touch wiring structure in area B of

[0056] Figure 6 is Figure 5 Schematic diagram of the first sub - segment structure in

[0057] Figure 7 is Figure 5 Schematic diagram of the second sub - segment structure in

[0058] Figure 8 is Figure 2 Another schematic diagram of the touch wiring structure in area B of

[0059] Figure 9 is Figure 2 Another schematic diagram of the touch wiring structure in area B of

[0060] Figure 10 is Figure 8 Schematic diagram of the first sub - segment structure in

[0061] Figure 11 is Figure 8 Schematic diagram of the second sub - segment structure in

[0062] Figure 12 is Figure 2 Schematic diagram of the touch wiring structure in area C of

[0063] Figure 13 is Figure 2 Schematic diagram of the touch wiring structure in area F of

[0064] Figure 14 is Figure 2 Schematic diagram of the touch wiring structure in area D or area E of

[0065] Figure 15 Schematic diagram of the display module structure in an exemplary embodiment of the present disclosure;

[0066] Figure 16 is Figure 13 Cross - sectional view of B1 - B2 in

[0067] Descriptions of the main component reference numerals in the figure are as follows:

[0068] Y - First direction; X - Second direction; 100 - Substrate; 110 - Touch area; 121 - First trace area; 122 - Second trace area; 123 - Bonding area; 215 - Light-shielding layer; 216 - Active layer; 217 - First gate insulating layer; 218 - First gate metal layer; 219 - Second gate insulating layer; 220 - Second gate metal layer; 221 - Interlayer dielectric layer; 222 - First source / drain layer; 223 - First planarization layer; 224 - Second source / drain layer; 225 - Second planarization layer; 226 - First electrode layer; 227 - Light-emitting functional layer; 228 - Second electrode layer; 229 - Pixel definition layer; 230 - Encapsulation layer; 300 - Touch layer; 301 - First conductive layer; 302 - Second conductive layer; 303 - First insulating layer; 304 - Second insulating layer; 305 - Protective layer; 306 - Touch trace; 307 - First touch electrode; 070 - First electrode group; 071 - First bridge connection; 308 - Second touch electrode; 080 - Second electrode group; 081 - Second bridge connection; 310 - First extension segment; 311 - First electrode connection segment; 312 - First via area; 313 - First connection area; 314 - First sub-connection segment; 315 - Second sub-connection segment; 316 - First guiding segment; 317 - Second via area; 318 - Second connection area; 319 - First sub-segment; 320 - Second sub-segment; 330 - Second extension segment; 340 - Third extension segment; 341 - Second electrode connection segment; 342 - Third via area; 343 - Third connection area; 344 - Third sub-connection segment; 345 - Fourth sub-connection segment; 346 - Second guiding segment; 347 - Fourth via area; 348 - Fourth connection area; 400 - Touch integrated circuit; 500 - Flexible circuit board. Detailed implementation manners

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure.

[0070] In the figures, the thicknesses of regions and layers may be exaggerated for clarity. Like reference numerals in the figures denote like or similar structures and thus their detailed descriptions will be omitted.

[0071] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will recognize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical concepts of the present disclosure.

[0072] When a structure is "on" another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0073] The terms "a", "an", and "the" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first" and "second", etc. are used only as labels and are not a limitation on the quantity of their objects.

[0074] Currently, a flexible touch display screen is formed by means of flexible touch (Flexmeshlayeroncell, FMLOC). The touch layer included in the flexible touch display screen is integrated onto the flexible display substrate, and the touch layer is protected by an organic layer at its uppermost layer. For an OLED (Organic Light-Emitting Diode) touch display screen, the touch traces connect the touch electrodes and the peripheral chips. Currently, the space occupied by the arrangement of the touch traces in the touch display screen is relatively large, and it cannot meet the pursuit of users for a narrower bezel design.

[0075] Such as Figure 1 , Figure 2 and Figure 15As shown in the figure, in an embodiment of the present disclosure, a touch display panel is provided, which includes a substrate 100 and a touch layer 300. The substrate 100 includes a touch area 110, a first wiring area 121, and a bonding area 123. The bonding area 123 is located on one side of the touch area 110 in the first direction Y, and the first wiring area 121 is located between the touch area 110 and the bonding area 123. The touch layer 300 is disposed on one side of the substrate 100. The touch layer 300 includes at least two stacked conductive layers and a first insulating layer 303 disposed between the conductive layers. The touch layer 300 further includes a plurality of touch electrodes and a plurality of touch traces 306. The touch electrodes are distributed on the conductive layers and are located in the touch area 110. One end of the touch trace 306 is connected to the touch electrode, and the other end extends to the bonding area 123. The touch trace 306 is at least partially located in the first wiring area 121 and the touch trace 306 is distributed on at least two conductive layers. The orthographic projections of the touch traces 306 distributed on different conductive layers on the substrate 100 at least partially overlap. Among them, the touch trace 306 includes at least one first extension segment 310 extending along the second direction X, the second direction X intersects with the first direction Y, the first extension segment 310 is distributed on at least two conductive layers, and the first extension segments 310 distributed on different conductive layers are connected through vias of the first insulating layer 303. The line width of the area of the first extension segment 310 provided with vias is greater than the line width of the area of the first extension segment 310 not provided with vias.

[0076] In the touch display panel provided by the present disclosure, the first extension segments 310 of the touch traces 306 are distributed on at least two conductive layers, and the first extension segments 310 distributed on different conductive layers are connected through vias. The line width of the area of the first extension segment 310 provided with vias is greater than the line width of the area of the first extension segment 310 not provided with vias. Thus, it helps to reduce the occupied space of the touch trace 306 in the first wiring area 121 and achieve a narrower bezel design of the touch display panel.

[0077] The following will describe in detail each component of the touch display panel provided by the embodiment of the present disclosure with reference to the accompanying drawings:

[0078] As Figure 1 、 Figure 2 and Figure 15 shown, the present disclosure provides a touch display panel, which includes a substrate 100 and a touch layer 300 disposed on one side of the substrate 100.

[0079] As Figure 1 and Figure 2As shown, the substrate 100 includes a touch area 110, a first wiring area 121, and a bonding area 123. The bonding area 123 is located on one side of the touch area 110 in the first direction Y, and the first wiring area 121 is located between the touch area 110 and the bonding area 123. The bonding area 123 can be used to assemble structures such as a touch integrated circuit 400 (also known as a touch IC) and a flexible printed circuit 500 (FPC for short). In some embodiments, the substrate 100 further includes a second wiring area 122, which is located on at least one side of the touch area 110 in the second direction X. The number of the second wiring areas 122 can be two, which are respectively located on both sides of the touch area 110 in the second direction X. The second direction X intersects with the first direction Y, and the included angle therebetween can be 85°-90°. Further, the second direction X is substantially perpendicular to the first direction Y. The substrate 100 can be a glass substrate or a flexible substrate, and the specific type is not limited in the present disclosure.

[0080] As Figure 2 and Figure 15 As shown, the touch layer 300 is disposed on one side of the substrate 100. The touch layer 300 includes at least two stacked conductive layers and a first insulating layer 303 disposed between adjacent two conductive layers. The touch layer 300 further includes a plurality of touch electrodes and a plurality of touch traces 306. The touch electrodes are distributed on the conductive layers and are located in the touch area 110. One end of each touch trace 306 is connected to a touch electrode, and the other end extends to the bonding area 123 for connection with the touch integrated circuit 400 or the flexible printed circuit 500 in the bonding area 123.

[0081] In some embodiments of the present disclosure, the plurality of touch electrodes include a plurality of first touch electrodes 307 and a plurality of second touch electrodes 308, and the plurality of first touch electrodes 307 and the plurality of second touch electrodes 308 are arranged in an alternating array; the plurality of first touch electrodes 307 are arranged along the first direction Y and are connected to each other to form a first electrode group 070, and the plurality of second touch electrodes 308 are arranged along the second direction X and are connected to each other to form a second electrode group 080. The first electrode group 070 and the second electrode group 080 are insulated from each other. The orthographic projections of the first touch electrode 307 and the second touch electrode 308 on the substrate 100 are substantially diamond-shaped. Further, the first touch electrode 307 and the second touch electrode 308 are provided on the same layer, that is, the first touch electrode 307 and the second touch electrode 308 are formed of the same material and by the same process. The first touch electrode 307 and the second touch electrode 308 are grid-shaped electrode blocks. The plurality of first touch electrodes 307 and the plurality of second touch electrodes 308 are alternately arranged to form a checkerboard structure. Adjacent two first touch electrodes 307 in the first electrode group 070 can be connected by a first bridging wire 071, and adjacent two second touch electrodes 308 in the second electrode group 080 can be connected by a second bridging wire 081. The first bridging wire 071 and the second bridging wire 081 are respectively distributed in different conductive layers, and the orthographic projections of the first bridging wire 071 and the second bridging wire 081 on the substrate 100 at least partially overlap.

[0082] Further, at least two conductive layers include a first conductive layer 301 and a second conductive layer 302, and the second conductive layer 302 is provided on a side of the first conductive layer 301 away from the substrate 100. A first insulating layer 303 is provided between the first conductive layer 301 and the second conductive layer 302. In one embodiment, the first touch electrode 307, the second touch electrode 308, and the first bridging wire 071 are distributed on the first conductive layer 301, and the second bridging wire 081 is distributed on the second conductive layer 302. In another embodiment, the first bridging wire 071 is distributed on the first conductive layer 301, and the first touch electrode 307, the second touch electrode 308, and the second bridging wire 081 are distributed on the first conductive layer 301.

[0083] The first electrode group 070 can be a driving electrode group connected to the driving circuit in the touch integrated circuit 400, and the second electrode group 080 can be a detecting electrode group connected to the detecting circuit. Alternatively, the first electrode group 070 is a detecting electrode group connected to the detecting circuit in the touch integrated circuit 400, and the second electrode group 080 is a driving electrode group connected to the driving circuit. Specifically, the first electrode group 070 and the second electrode group 080 can be connected to their respective corresponding driving circuits or detecting circuits through the touch traces 306. When the user's finger touches the touchable area of the display panel, the mutual capacitance of the first electrode group 070 and the second electrode group 080 arranged in an insulating cross pattern at the touch point changes. The driving circuit sequentially scans the driving electrode groups in the first electrode group 070 and the second electrode group 080, and reads the signals of the detecting electrode groups in each of the first electrode group 070 and the second electrode group 080 while scanning each driving electrode group. Through one round of scanning, the coordinates of the touch point can be determined, and content responses corresponding to the touch operation are performed based on the coordinates of the touch point.

[0084] As Figures 2 to 4 , Figure 5 , Figure 8 and Figure 9 shown, Figure 3 is Figure 2 a schematic diagram of the touch trace structure in area A of Figure 5 , Figure 8 and Figure 9 are Figure 2 schematic diagrams of different embodiments of the touch trace structure in area B of Figure 2 . The touch trace 306 is at least partially located in the first trace area 121 and the touch trace 306 is distributed in at least two conductive layers, and the orthographic projections of the touch traces 306 distributed in different conductive layers on the substrate 100 at least partially overlap. Among them, the touch trace 306 includes at least one first extension segment 310 extending along the second direction X, such as

[0085] the parts in area A and area B of Figure 2 . The first extension segment 310 is distributed in at least two conductive layers and the first extension segments 310 distributed in different conductive layers are connected by vias, and the line width of the area of the first extension segment 310 provided with vias is greater than the line width of the area of the first extension segment 310 not provided with vias. For example, the line width of the area of the first extension segment 310 provided with vias is not less than 10 μm, and the line width of the area of the first extension segment 310 not provided with vias is greater than or equal to 3 μm and less than 10 μm.

[0085] A single touch trace 306 can include multiple first extension segments 310, and different first extension segments 310 can be distributed at different positions on the substrate 100. Such as Figure 2 , Figure 5 , Figure 8 and Figure 9As shown, in some embodiments of the present disclosure, at least one first extension segment 310 includes at least one first guiding segment 316. The first guiding segment 316 is located in the first routing area 121 and the first guiding segment 316 is not in direct contact with the touch electrode. The first guiding segment 316 includes at least one second via area 317 and at least one second connecting segment 318 that are connected to each other. The second via areas 317 and the second connecting segments 318 are arranged alternately. The second via areas 317 are provided with vias, and the line width of the second via areas 317 is greater than the line width of the second connecting segments 318. Further, the distance between the outer boundary of the second via area 317 and the via hole edge within the second via area 317 is not less than 2.5 μm to ensure the stability of via connection.

[0086] Both the second via area 317 and the second connecting segment 318 have a first side close to the touch electrode and a second side far from the touch electrode. There is a first distance between the first side of the second via area 317 and the first side of the second connecting segment 318, and there is a second distance between the second side of the second via area 317 and the second side of the second connecting segment 318. As Figure 5 and Figure 8 shown, in one embodiment, both the first distance and the second distance are greater than 0, and the difference between the first distance and the second distance does not exceed 1 μm. Preferably, the first distance and the second distance are substantially equal. As Figure 9 shown, in another embodiment, among the two second connecting segments 318 on both sides of the second via area 317 in the second direction X, the distance between the first side of one second connecting segment 318 and the first side of the second via area 317 is 0, and the distance between the second side of the other second connecting segment 318 and the second side of the second via area 317 is 0.

[0087] In a specific embodiment, the first guiding segments 316 of different touch traces 306 are arranged at intervals along the first direction Y, and the second via areas 317 of the first guiding segments 316 of adjacent two touch traces 306 are arranged in a staggered manner. Further, the distance between the second via areas 317 of the first guiding segments 316 of adjacent two touch traces 306 in the first direction Y is less than the distance between the second connecting segments 318 of the first conductive segments of adjacent two touch traces 306 in the first direction Y. For example, if the distance between the second connecting segments 318 of the first guiding segments 316 of adjacent two touch traces 306 in the first direction Y is 3 μm, then the distance between the second via areas 317 of the first guiding segments 316 of adjacent two touch traces 306 can be less than 3 μm due to the staggered arrangement in the first direction Y. In this way, it helps to reduce the space occupied by the arrangement of multiple touch traces 306 in the first direction Y, and further reduces the width of the first routing area 121, achieving a narrower bezel design.

[0088] As Figures 8 to 11As shown, in some embodiments of the present disclosure, the first guiding segment 316 includes a first sub-segment 319 and a second sub-segment 320 that are arranged at intervals and connected in sequence. The first sub-segment 319 is distributed on the first conductive layer 301, and the second sub-segment 320 is distributed on the second conductive layer 302. Both the first sub-segment 319 and the second sub-segment 320 have a second via region 317 and a second connection region 318. The second via region 317 of the first sub-segment 319 and the second via region 317 of the adjacent second sub-segment 320 at least partially overlap in the orthographic projection on the substrate 100, and the orthographic projections of the second connection region 318 of the first sub-segment 319 and the second connection region 318 of the second sub-segment 320 on the substrate 100 do not overlap. That is, the first guiding segment 316 is formed by alternately connecting the first sub-segment 319 and the second sub-segment 320 along its extending direction. Further, this structure in which different sub-segments located in different conductive layers are alternately connected can be deduced and applied to the entire touch trace 306, that is, each touch trace 306 is formed by alternately connecting different sub-segments located in different conductive layers.

[0089] Further, in the present disclosure, the materials of the first conductive layer 301 and the second conductive layer 302 both contain titanium (Ti) and aluminum (Al), and the first conductive layer 301 and the second conductive layer 302 are multi-layer stacked structures, specifically a titanium (Ti)-aluminum (Al)-titanium (Ti) structure, that is, formed by stacking a titanium (Ti) metal layer, an aluminum (Al) metal layer, and a titanium (Ti) metal layer. The thicknesses of the first conductive layer 301 and the second conductive layer 302 are different. According to actual requirements, the thickness of the first conductive layer 301 can be greater than the thickness of the second conductive layer 302, or the thickness of the second conductive layer 302 is greater than the thickness of the first conductive layer 301. When the touch trace 306 is formed by alternately connecting different sub-segments located in different conductive layers, it helps to reduce the resistance difference between the touch traces 306 and reduce the process difficulty of performing resistance compensation on the touch traces 306.

[0090] Such as Figures 5 to 7As shown, in some other embodiments of the present disclosure, the first guiding segment 316 includes a first sub-segment 319 and a second sub-segment 320. The first sub-segment 319 is distributed on the first conductive layer 301, and the second sub-segment 320 is distributed on the second conductive layer 302. Both the first sub-segment 319 and the second sub-segment 320 are continuous conductive wires. The orthographic projections of the first sub-segment 319 and the second sub-segment 320 on the substrate 100 at least partially overlap. Both the first sub-segment 319 and the second sub-segment 320 have a second via region 317 and a second connection region 318. The orthographic projections of the second via region 317 of the first sub-segment 319 and the second via region 317 of the adjacent second sub-segment 320 on the substrate 100 at least partially overlap, and the orthographic projections of the second connection region 318 of the first sub-segment 319 and the second connection region 318 of the second sub-segment 320 on the substrate 100 overlap. That is, the first guiding segment 316 is composed of continuous conductive wires located in different conductive layers. Further, in this embodiment, the touch trace 306 is also composed of continuous conductive wires located in different conductive layers. In this way, it helps to reduce the resistance of the touch trace 306 and reduce power consumption.

[0091] As Figure 2 and Figure 12 shown, Figure 12 is Figure 2 a schematic diagram of the touch trace structure in region C of. In some embodiments of the present disclosure, the touch trace 306 further includes at least one second extension segment 330 extending in the third direction. The second extension segment 330 connects two adjacent first extension segments 310. The third direction is not parallel to the first direction Y and the third direction is not parallel to the second direction X. The second extension segment 330 is distributed on at least two conductive layers and the second extension segments 330 distributed on different conductive layers are connected by vias. The line width of the second extension segment 330 is greater than the line width of the region of the first extension segment 310 without vias. The line width of the second extension segment 330 is not less than 10 μm.

[0092] As Figure 2 , Figure 13 and Figure 14 shown, Figure 13 is Figure 2 a schematic diagram of the touch trace structure in region F of; Figure 14 is Figure 2Schematic diagram of the touch trace structure in region D or region E. In some embodiments of the present disclosure, the touch trace 306 further includes at least one third extension segment 340 extending along the first direction Y. The third extension segments 340 are distributed in at least two conductive layers and the third extension segments 340 in different conductive layers are connected by vias. The line width of the area of the third extension segment 340 where vias are provided is greater than the line width of the area of the third extension segment 340 where no vias are provided. For example, the line width of the area of the third extension segment 340 where vias are provided is not less than 10 μm, and the line width of the area of the third extension segment 340 where no vias are provided is greater than or equal to 3 μm and less than 10 μm.

[0093] A single touch trace 306 may include multiple third extension segments 340, and different third extension segments 340 may be distributed at different positions of the substrate 100. As Figure 2 and Figure 14 shown, in some embodiments of the present disclosure, at least one third extension segment 340 includes at least one second guiding segment 346. The second guiding segment 346 is located in the first trace area 121 or the second trace area 122, and the second guiding segment 346 is not in direct contact with the touch electrode. The second guiding segment 346 includes at least one fourth via area 347 and at least one fourth connecting area 348 connected to each other. The fourth via area 347 is provided with vias, and the line width of the fourth via area 347 is greater than the line width of the fourth connecting area 348. The distance between the outer boundary of the fourth via area 347 and the via hole edge inside the fourth via area 347 is not less than 2.5 μm.

[0094] Further, both the fourth via area 347 and the fourth connecting area 348 have a first side close to the touch electrode and a second side far from the touch electrode; there is a first distance between the first side of the fourth via area 347 and the first side of the fourth connecting area 348, and there is a second distance between the second side of the fourth via area 347 and the second side of the fourth connecting area 348. In one embodiment, both the first distance and the second distance are greater than 0, and the difference between the first distance and the second distance does not exceed 1 μm. Preferably, the first distance and the second distance are substantially equal. Of course, the structure of the second guiding segment 346 can also refer to the structure design of the first guiding segment 316 in Figure 8 and Figure 9 and will not be elaborated in detail here.

[0095] As Figure 2 and Figure 14As shown, the second guiding segments 346 of different touch conduction traces 306 are arranged at intervals along the second direction X, and the fourth via regions 347 of the second guiding segments 346 of two adjacent touch conduction traces 306 are arranged in a staggered manner. Further, the distance between the fourth via regions 347 of the second guiding segments 346 of two adjacent touch conduction traces 306 in the second direction X is less than the distance between the fourth connection regions 348 of the second conductive segments of two adjacent touch conduction traces 306 in the second direction X. For example, if the distance between the fourth connection regions 348 of the second guiding segments 346 of two adjacent touch conduction traces 306 in the second direction X is 3 μm, then since the fourth via regions 347 of the second guiding segments 346 of two adjacent touch conduction traces 306 are arranged in a staggered manner, the distance in the second direction X can be less than 3 μm. In this way, it helps to reduce the space occupied by multiple touch conduction traces 306 arranged in the second direction X, thereby reducing the width of the second trace region 122 and achieving a narrower bezel design.

[0096] The touch conduction trace 306 can be connected to the first electrode group 070 and the second electrode group 080. As Figure 2 and Figure 3 shown, in some embodiments, the touch conduction trace 306 is connected to the first electrode group 070, and at least one first extension segment 310 includes a first electrode connection segment 311, and the first electrode connection segment 311 is in contact connection with the touch electrode; the first electrode connection segment 311 includes at least one first via region 312 and at least one first connection segment 313 that are connected to each other. The first via region 312 is provided with a via, and the line width of the first via region 312 is greater than the line width of the first connection segment 313. The distance L1 between the outer boundary of the first via region 312 and the via hole edge inside the first via region 312 is not less than 2.5 μm. The touch conduction trace 306 is in contact connection with the first touch electrode 307 group through the first electrode connection segment 311.

[0097] Both the first via region 312 and the first connection segment 313 have a first side close to the touch electrode and a second side far from the touch electrode, and the second sides of the first via region 312 and the first connection segment 313 are flush. In this way, a part of the first via region 312 can be located in the touch region 110, thereby reducing the space occupied by the touch conduction trace 306 in the first trace region 121 and providing a structural basis for reducing the width of the first trace region 121.

[0098] As Figure 3 and Figure 4 shown, Figure 4 For Figure 3Cross-sectional view in the A1-A2 direction. Further, the first electrode connection segment 311 includes a first sub-connection segment 314 and a second sub-connection segment 315. Among them, the first sub-connection segment 314 is distributed on the first conductive layer 301, and the second sub-connection segment 315 is distributed on the second conductive layer 302. Among the first sub-connection segment 314 and the second sub-connection segment 315, one of them is distributed on the same conductive layer as the first touch electrode 307 and is in direct contact with the first touch electrode 307. The orthographic projection of the first sub-connection segment 314 on the substrate 100 and the orthographic projection of the second sub-connection segment 315 on the substrate 100 at least partially overlap. Further, the overlap rate of the orthographic projection of the first sub-connection segment 314 on the substrate 100 and the orthographic projection of the second sub-connection segment 315 on the substrate 100 is not less than 90%.

[0099] As Figure 2 and Figure 13 shown, in some other embodiments, the touch trace 306 is connected to the second electrode group 080. At least one third extension segment 340 includes a second electrode connection segment 341. The second electrode connection segment 341 is located in the second trace area 122. The touch trace 306 is in contact connection with the second electrode group 080 through the second electrode connection segment 341. The second electrode connection segment 341 includes at least one third via area 342 and at least one third connection area 343 that are connected to each other. The third via area 342 is provided with vias, and the line width of the third via area 342 is greater than the line width of the third connection area 343. The distance between the outer boundary of the third via area 342 and the via hole edge in the third via area 342 is not less than 2.5 μm.

[0100] Both the third via area 342 and the third connection area 343 have a first side close to the second electrode group 080 and a second side far from the second electrode group 080. The second side of the third via area 342 is flush with the second side of the third connection area 343. In this way, a part of the third via area 342 can be located in the touch area 110, thereby reducing the space occupied by the touch trace 306 in the second trace area 122 and providing a structural basis for reducing the width of the second trace area 122.

[0101] Further, as Figure 16As shown in the figure, the second electrode connection segment 341 includes a third sub-connection segment 344 and a fourth sub-connection segment 345. Among them, the third sub-connection segment 344 is distributed on the first conductive layer 301, and the fourth sub-connection segment 345 is distributed on the second conductive layer 302. Among the third sub-connection segment 344 and the fourth sub-connection segment 345, one of them is distributed on the same conductive layer as the second touch electrode 308 and is in direct contact with the second touch electrode 308. The orthographic projection of the third sub-connection segment 344 on the substrate 100 and the orthographic projection of the fourth sub-connection segment 345 on the substrate 100 at least partially overlap. Further, the overlap rate of the orthographic projection of the third sub-connection segment 344 on the substrate 100 and the orthographic projection of the fourth sub-connection segment 345 on the substrate 100 is not less than 90%.

[0102] The touch layer 300 may further include a protective layer 305, and the protective layer 305 is provided on the side of the second conductive layer 302 away from the substrate 100.

[0103] As Figure 15 shown, in some embodiments of the present disclosure, the touch display panel further includes a driving circuit layer, a light-emitting layer, and a packaging layer 230 provided between the substrate 100 and the touch layer 300; the driving circuit layer includes a plurality of pixel circuits, the light-emitting layer is provided on the side of the driving circuit layer away from the substrate 100, the light-emitting layer includes a plurality of light-emitting devices, and the pixel circuits are used to drive the light-emitting devices to emit light in a one-to-one correspondence; the packaging layer 230 covers the side of the light-emitting layer away from the substrate 100.

[0104] Taking the transistor in the driving circuit as a top-gate thin-film transistor as an example, the driving circuit layer includes an active layer 216, a first gate insulating layer 217, a first gate metal layer 218, a second gate insulating layer 219, an interlayer dielectric layer 221, a first source-drain layer 222, a first planarization layer 223, a second source-drain layer 224, and a second planarization layer 225.

[0105] The active layer 216 is disposed on one side of the substrate 100; the first gate insulating layer 217 is disposed on the side of the active layer 216 away from the substrate 100, and the first gate insulating layer 217 covers the active layer 216; the first gate metal layer 218 is disposed on the side of the first gate insulating layer 217 away from the substrate 100, and the first gate metal layer 218 may include the gate of the transistor and the first electrode plate of the capacitor. The second gate insulating layer 219 is disposed on the side of the first gate metal layer 218 away from the substrate 100, and the second gate insulating layer 219 covers the first gate metal layer 218; the second gate metal layer 220 is disposed on the side of the second gate insulating layer 219 away from the substrate 100, and the second gate metal layer 220 may include the second electrode plate of the capacitor. The interlayer dielectric layer 221 is disposed on the side of the second gate insulating layer 219 away from the substrate 100; the first source-drain layer 222 is disposed on the side of the interlayer dielectric layer 221 away from the substrate 100, and the first source-drain layer 222 includes the source and drain of the transistor, and the source and drain are connected to the active layer 216. The first planarization layer 223 is disposed on the side of the first source-drain layer 222 away from the substrate 100, the second source-drain layer 224 is disposed on the side of the first planarization layer 223 away from the substrate 100, and the second planarization layer 225 is disposed on the side of the second source-drain layer 224 away from the substrate 100. Further, the driving circuit layer further includes a light-shielding layer 215 disposed between the substrate 100 and the active layer 216.

[0106] The light-emitting layer is disposed on the side of the driving circuit layer away from the substrate 100. The light-emitting layer further includes a pixel definition layer 229 that separates a plurality of light-emitting devices.

[0107] The pixel definition layer 229 is disposed on the side of the driving circuit layer away from the substrate 100. The pixel definition layer 229 includes a plurality of pixel openings, and the range defined by each pixel opening is the range of a light-emitting device. The shape of the pixel opening, that is, the shape of the contour of the positive projection of the pixel opening on the substrate 100, may be a polygon, a smooth closed curve, or other shapes, which are not specially limited herein. Further, a grid-shaped touch electrode is provided, and the grid openings thereof correspond to the pixel openings to avoid blocking the light emitted by the light-emitting devices.

[0108] Taking the light-emitting device as an OLED light-emitting device as an example, the light-emitting device includes a first electrode layer 226, a light-emitting functional layer 227, and a second electrode layer 228 sequentially arranged in a direction away from the substrate 100. The first electrode layer 226 can serve as the anode layer of the light-emitting device. The light-emitting functional layer 227 covers the first electrode layer 226, and the second electrode layer 228 covers the light-emitting functional layer 227. The first electrode layer 226 can be connected to the source / drain of the transistor. The second electrode layer 228 can cover the light-emitting functional layer 227, which can serve as the cathode layer of the light-emitting device. The second electrode layer 228 can be a single-layer or multi-layer structure, and its material can include one or more of conductive metals, metal oxides, and alloys. The light-emitting functional layer 227 is at least partially disposed within the pixel opening, and can include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer sequentially stacked in a direction away from the substrate 100. Visible light can be generated by recombining holes and electrons into excitons in the light-emitting material layer and the excitons radiating photons. The specific light-emitting principle will not be elaborated here.

[0109] The encapsulation layer 230 is disposed on a side of the light-emitting layer away from the substrate 100, and can be used to protect the light-emitting layer and prevent external water and oxygen from eroding the light-emitting device. In some embodiments of the present disclosure, encapsulation can be achieved by means of thin-film encapsulation (TFE). Specifically, the encapsulation layer 230 can include a first inorganic layer, an organic layer, and a second inorganic layer. Among them, the first inorganic layer covers the surface of the light-emitting layer away from the substrate 100. The organic layer can be disposed on the surface of the first inorganic layer away from the substrate 100, and the boundary of the organic layer is defined inside the boundary of the first inorganic layer. The second inorganic layer covers the organic layer and the first inorganic layer not covered by the organic layer. Water and oxygen can be blocked from intrusion through the second inorganic layer, and planarization can be achieved through the flexible organic layer. The touch layer 300 is disposed on a side of the encapsulation layer 230 away from the substrate 100. The touch layer 300 further includes a second insulating layer 304, and the second insulating layer 304 is disposed between the encapsulation layer 230 and the first conductive layer 301.

[0110] As Figure 1 、 Figure 2 and Figure 15 shown, the present disclosure also provides a method for manufacturing a touch display panel, including:

[0111] Providing a substrate 100, the substrate 100 includes a touch area 110, a first wiring area 121, and a bonding area 123. The bonding area 123 is located on one side of the touch area 110 in the first direction Y, and the first wiring area 121 is located between the touch area 110 and the bonding area 123;

[0112] A touch control layer 300 is formed on one side of a substrate 100. The touch control layer 300 includes at least two conductive layers arranged in a stacked manner and a first insulating layer 303 disposed between adjacent two conductive layers. The touch control layer 300 further includes a plurality of touch electrodes and a plurality of touch traces 306. The touch electrodes are distributed on the conductive layers and located in a touch area 110. One end of the touch trace 306 is connected to the touch electrode, and the other end extends to a bonding area 123. The touch trace 306 is at least partially located in a first trace area 121 and the touch trace 306 is distributed on at least two conductive layers. The orthographic projections of the touch traces 306 distributed on different conductive layers on the substrate 100 at least partially overlap.

[0113] Wherein, the touch trace 306 includes at least one first extension segment 310 extending along a second direction X, the second direction X intersects with a first direction Y, the first extension segment 310 is distributed on at least two conductive layers and the first extension segments 310 distributed on different conductive layers are connected through vias of the first insulating layer 303. The line width of the area of the first extension segment 310 provided with vias is greater than the line width of the area of the first extension segment 310 not provided with vias.

[0114] The present disclosure also provides a display device, including the above-mentioned touch display panel. The touch display panel can be the touch display panel of any of the above embodiments. Its specific structure and beneficial effects can refer to the embodiments of the display panel in the above text, which will not be elaborated herein. The display device of the present disclosure can be an electronic device such as a mobile phone, a tablet computer, a television, etc., which will not be listed one by one herein.

[0115] It should be noted that although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be executed in this specific order, or that all the steps shown must be executed to achieve the desired result. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step for execution, and / or one step can be decomposed into multiple steps for execution, etc., which should all be regarded as part of the present disclosure.

[0116] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The present disclosure can have other embodiments and can be implemented and executed in various ways. The foregoing variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more separate features mentioned or obvious in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. A touch display panel, characterized in that, Comprising: A substrate substrate, including a touch area, a first wiring area, and a bonding area, the bonding area being located on one side of the touch area in a first direction, and the first wiring area being located between the touch area and the bonding area; A touch layer provided on one side of the substrate substrate, the touch layer including at least two conductive layers stacked and a first insulating layer provided between adjacent two of the conductive layers, the touch layer further including a plurality of touch electrodes and a plurality of touch traces, the touch electrodes being distributed on the conductive layers and located in the touch area, one end of the touch traces being connected to the touch electrodes and the other end extending to the bonding area, the touch traces being at least partially located in the first wiring area and the touch traces being distributed on at least two of the conductive layers, and the orthographic projections of the touch traces distributed on different conductive layers on the substrate substrate at least partially overlapping; Wherein, the touch traces include at least one first extension segment extending in a second direction, the second direction intersecting the first direction, the first extension segment being distributed on at least two of the conductive layers and the first extension segments distributed on different conductive layers being connected through vias in the first insulating layer, the line width of the area of the first extension segment provided with vias being greater than the line width of the area of the first extension segment not provided with vias; the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes, the plurality of first touch electrodes and the plurality of second touch electrodes being arranged in an interval array; the at least two conductive layers include a first conductive layer and a second conductive layer, and the second conductive layer is provided on a side of the first conductive layer away from the substrate substrate.

2. The touch display panel according to claim 1, wherein, The at least one first extension segment includes a first electrode connection segment, and the first electrode connection segment is in contact connection with the touch electrode. The first electrode connection segment includes at least one first via area and at least one first connection area connected to each other, the first via area being provided with vias, and the line width of the first via area being greater than the line width of the first connection area.

3. The touch display panel according to claim 2, wherein Both the first via area and the first connection area have a first side close to the touch electrode and a second side far from the touch electrode, and the second side of the first via area is flush with the second side of the first connection area.

4. The touch display panel according to claim 2, wherein The distance between the outer boundary of the first via area and the via hole edge in the first via area is not less than 2.5 μm.

5. The touch display panel according to claim 2, wherein The plurality of first touch electrodes are arranged in the first direction and connected to each other to form a first electrode group, and the plurality of second touch electrodes are arranged in the second direction and connected to each other to form a second electrode group; The touch traces are in contact connection with the first touch electrode group through the first electrode connection segment.

6. The touch display panel according to claim 1, wherein The at least one first extension segment includes at least one first guiding segment, the first guiding segment being located in the first wiring area and the first guiding segment not being in direct contact with the touch electrode; The first guiding segment includes at least one second via area and at least one second connection area connected to each other, the second via area being provided with vias, and the line width of the second via area being greater than the line width of the second connection area.

7. The touch display panel according to claim 6, wherein The first guiding segments of the different touch traces are arranged at intervals along the first direction, and the second via regions of the first guiding segments of two adjacent touch traces are arranged in a staggered manner.

8. The touch display panel according to claim 6, wherein The first guiding segment includes a first sub-segment and a second sub-segment that are arranged at intervals and connected in sequence. The first sub-segment is distributed on the first conductive layer, and the second sub-segment is distributed on the second conductive layer; Both the first sub-segment and the second sub-segment have the second via region and the second connection region; The positive projection of the second via region of the first sub-segment and the positive projection of the second via region of the adjacent second sub-segment on the substrate at least partially overlap, and the positive projection of the second connection region of the first sub-segment and the positive projection of the second connection region of the second sub-segment on the substrate do not overlap.

9. The touch display panel according to claim 6, wherein The first guiding segment includes a first sub-segment and a second sub-segment. The first sub-segment is distributed on the first conductive layer, and the second sub-segment is distributed on the second conductive layer; Both the first sub-segment and the second sub-segment are continuous conductive lines; The positive projections of the first sub-segment and the second sub-segment on the substrate at least partially overlap.

10. The touch display panel according to claim 6, wherein, Both the second via region and the second connection region have a first side close to the touch electrode and a second side far from the touch electrode; There is a first distance between the first sides of the second via region and the second connection region, and there is a second distance between the second sides of the second via region and the second connection region. Both the first distance and the second distance are greater than 0, and the difference between the first distance and the second distance does not exceed 1 μm.

11. The touch display panel according to claim 6, wherein The distance between the outer boundary of the second via region and the via hole edge in the second via region is not less than 2.5 μm.

12. The touch display panel according to claim 1, wherein The touch trace further includes at least one second extension segment extending along the third direction. The second extension segment connects two adjacent first extension segments. The third direction is not parallel to the first direction and the third direction is not parallel to the second direction; The second extension segment is distributed on at least two conductive layers and the second extension segments distributed on different conductive layers are connected by vias. The line width of the second extension segment is greater than the line width of the region of the first extension segment without vias.

13. The touch display panel according to claim 1, wherein The line width of the region of the first extension segment with vias is not less than 10 μm, and the line width of the region of the first extension segment without vias is greater than or equal to 3 μm and less than 10 μm.

14. The touch display panel according to claim 1, wherein, The substrate further includes a second trace region, and the second trace region is located on at least one side of the touch region in the second direction; Among them, the touch trace further includes at least one third extension segment extending along the first direction. The third extension segment is distributed on at least two conductive layers and the third extension segments distributed on different conductive layers are connected by vias. The line width of the region of the third extension segment with vias is greater than the line width of the region of the third extension segment without vias.

15. The touch display panel according to claim 14, wherein, A plurality of the first touch electrodes are arranged along the first direction and connected to each other to form a first electrode group, and a plurality of the second touch electrodes are arranged along the second direction and connected to each other to form a second electrode group; The at least one third extension segment includes a second electrode connection segment located in the second trace region, and the touch trace is in contact connection with the second electrode group through the second electrode connection segment; The second electrode connection segment includes at least one third via region and at least one third connection segment connected to each other. The third via region is provided with vias, and the line width of the third via region is greater than the line width of the third connection segment.

16. The touch display panel according to claim 15, wherein, Both the third via region and the third connection segment have a first side close to the second electrode group and a second side far from the second electrode group, and the second sides of the third via region and the third connection segment are flush.

17. The touch display panel according to claim 14, wherein The at least one third extension segment includes at least one second guiding segment located in the first trace region or the second trace region, and the second guiding segment is not in direct contact with the touch electrode; The second guiding segment includes at least one fourth via region and at least one fourth connection segment connected to each other. The fourth via region is provided with vias, and the line width of the fourth via region is greater than the line width of the fourth connection segment; The second guiding segments of different touch traces are arranged at intervals along the second direction, and the fourth via regions of the second guiding segments of two adjacent touch traces are arranged in a staggered manner.

18. The touch display panel according to claim 1, wherein, The touch electrode is in a grid shape.

19. The touch display panel according to claim 1, wherein The touch display panel further includes a driving circuit layer, a light-emitting layer and a packaging layer disposed between the substrate and the touch layer; The driving circuit layer includes a plurality of pixel circuits. The light-emitting layer is disposed on a side of the driving circuit layer away from the substrate, and the light-emitting layer includes a plurality of light-emitting devices. The pixel circuits are used to drive the light-emitting devices to emit light in a one-to-one correspondence; The packaging layer covers a side of the light-emitting layer away from the substrate.

20. A display device, characterized in that, Comprising the touch display panel according to any one of claims 1-19.

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