Touch display panel and display device

Abstract

The present application discloses a touch display panel and a display device. The touch display panel includes a display area and a non-display area. The non-display area includes an overlap area. The touch display panel includes: a substrate and a touch electrode layer. The substrate includes a functional conductive layer and a lead terminal extending from the functional conductive layer to the overlap area. The touch electrode layer includes a plurality of touch electrodes located in the display area and a plurality of touch leads extending from the display area to the overlap area, and the touch leads are overlapped and connected to the lead terminals in the overlap area. Adjacent functional conductive layers and touch electrode layers are insulated by an insulating film layer, and protrusions are provided between adjacent touch leads in the overlap area, and the protrusions include at least one insulating film layer. The embodiments of the present application can reduce the possibility of photoresist residues appearing between adjacent touch leads in the touch lead manufacturing process, thereby reducing the possibility of short circuits between adjacent touch leads and improving the production yield of the touch display panel.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic products, and in particular to a touch display panel and a display device. Background Art

[0002] Touch technology is increasingly being used on display devices of various sizes. Compared with traditional keyboard and mouse input methods, touch screen input is simpler, more direct, and more convenient.

[0003] To implement touch functionality in a display device, a touch-sensitive layer is incorporated into the display panel. Touch leads extend from this layer, and the different touch leads are insulated from each other. The display panel also includes a drive circuit, to which the touch leads are electrically connected. During the molding process for the touch leads, due to process limitations, short circuits between the touch leads can occur, compromising the reliability of the display device.

[0004] Therefore, a new display panel and display device are urgently needed. Summary of the Invention

[0005] Embodiments of the present application provide a touch display panel and a display device, which reduce the possibility of short circuits between touch leads during the process of forming the touch leads.

[0006] An embodiment of the present application provides a touch display panel comprising a display area and a non-display area, wherein the non-display area includes an overlap area. The touch display panel comprises: a substrate comprising a functional conductive layer and lead terminals extending from the functional conductive layer to the overlap area. A touch electrode layer comprises a plurality of touch electrodes located in the display area and a plurality of touch leads extending from the display area to the overlap area, wherein the touch leads are overlapped and connected to the lead terminals in the overlap area. Adjacent functional conductive layers and touch electrode layers are insulated by an insulating film layer, and protrusions are provided between adjacent touch leads in the overlap area, wherein the protrusions comprise at least one insulating film layer.

[0007] On the other hand, an embodiment of the present application further provides a display device, comprising the touch display panel as described above.

[0008] The touch display panel and display device of the embodiments of the present application reduce the thickness difference between adjacent touch leads by setting a protrusion between adjacent touch leads in the overlapping area of ​​the display panel, and form an isolation structure between adjacent touch leads, thereby reducing the possibility of photoresist residue between adjacent touch leads in the touch lead manufacturing process, thereby reducing the possibility of short circuit between adjacent touch leads, and improving the production yield of the touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 This is a schematic structural diagram of a touch display panel according to some embodiments of the present application;

[0011] Figure 2 Show Figure 1 A cross-section in the middle AA direction;

[0012] Figure 3 A cross-sectional view of a display area of ​​a touch display panel according to some embodiments of the present application;

[0013] Figure 4 Show Figure 1 Another cross-section in the middle AA direction;

[0014] Figure 5 Show Figure 1 Another cross-section in the middle AA direction;

[0015] Figure 6 Showing an example Figure 1 A local magnified view of the middle Q region;

[0016] Figure 7 Schematic diagram of the structure of touch display panels according to some other embodiments of the present application.

[0017] Marking Description:

[0018] 100, touch display panel; AA, display area; NA, non-display area; NA1, bonding area; NA2, wiring area;

[0019] 1. Substrate; 11. Functional conductive layer; 111. Driving circuit structure layer; 1111. Drain conductive layer; 1112. Gate conductive layer; 112. Light-emitting device layer; 1121. Anode conductive layer; 1122. Cathode conductive layer; 12. Lead terminals; 121. First lead terminal; 122. Second lead terminal; 13. Insulating film layer; 131. Planarization layer; 132. Pixel definition layer; 133. Support pillars;

[0020] 2. Touch electrode layer; 21. Touch electrode; 211. First touch electrode; 212. Second touch electrode; 22. Touch lead; 221. First touch lead; 222. Second touch lead; 23. Protrusion; 231. First sub-portion; 232. Second sub-portion; 233. Sub-region; 25. Via hole;

[0021] X, first direction; Y, second direction; Z, light emitting direction of the touch display panel. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0024] Because touch operation is a simple and convenient way for human-computer interaction, more and more products are integrating touch functions into display panels. Touch panels can be divided into add-on touch panels (Add-on Mode Touch Panel), on-cell touch panels (On-Cell Touch Panel), and in-cell touch panels (In-Cell Touch Panel) based on their structure. Among them, in-cell touch panels are touch panels with the touch electrodes placed inside the display panel, which can reduce the overall thickness of the module and significantly reduce the production cost of the touch panel, thus gaining widespread application.

[0025] When manufacturing a display panel, to achieve a thinner and lighter design, some layers in the display area are typically removed from the non-display area. This results in the driver circuitry in the non-display area and the touch panel's touch leads being located on different film layers. A transfer hole is then provided in the non-display area to connect the touch leads to the driver circuitry. Because the display panel comprises multiple layers, at least some of which are formed by photolithography, the surface of the layers after photolithography is uneven, with step differences perpendicular to the display panel. As the photolithographic layers are stacked, the step differences on the side of the display panel facing the touch panel, perpendicular to the display panel, continue to accumulate.

[0026] The process of manufacturing a touch panel includes forming touch leads. A metal layer is attached to one surface of the display panel, and then a photoresist is coated on the surface of the metal layer facing away from the display panel. After photolithography, exposure and development, and etching, multiple independent touch leads are formed. If the surface difference between the touch leads is large in the direction perpendicular to the display panel, there will be a deep depression between some of the touch leads, resulting in a thicker thickness of the photoresist in the depression on the display panel surface. During the exposure and development process, insufficient exposure may cause some photoresist to remain in the depression on the display panel surface. During the etching process, it is difficult to remove the metal layer covered by the residual photoresist, resulting in a short circuit between two adjacent touch leads and the production of defective products.

[0027] Therefore, to solve the above problems, embodiments of the present application provide a touch display panel and a display device.

[0028] In order to better understand this application, on the one hand, the following Figures 1 to 7 It is described in detail according to the embodiments of the present application.

[0029] Figure 1 Schematic diagram of the structure of the touch display panel of some embodiments of the present application. Figure 2 Show Figure 1 A cross-section taken along the AA direction. Figure 3 This is a cross-sectional view of the display area of ​​a touch display panel according to some embodiments of the present application.

[0030] like Figures 1 to 3As shown, an embodiment of the present application provides a touch display panel 100. The touch display panel 100 includes a display area AA and a non-display area NA. The non-display area NA includes an overlapping area NA1. The touch display panel 100 includes a substrate 1 and a touch electrode layer 2. The substrate 1 includes a functional conductive layer 11 and a lead terminal 12 extending from the functional conductive layer 11 to the overlapping area NA1. The touch electrode layer 2 includes a plurality of touch electrodes 21 located in the display area AA and a plurality of touch leads 22 extending from the display area AA to the overlapping area NA1. The touch leads 22 are overlapped and connected to the lead terminal 12 in the overlapping area NA1. Adjacent functional conductive layers 11 and touch electrode layers 2 are insulated by an insulating film layer 13, and protrusions 23 are provided between adjacent touch leads 22 in the overlapping area NA1. The protrusions 23 include at least one layer of insulating film layer 13.

[0031] In the embodiment of the present application, the touch display panel 100 can be, for example, a liquid crystal display panel (LCD), an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, or a micro light emitting diode (Micro LED) display panel, without limitation. The following discussion will only take the touch display panel 100 as an OLED display panel as an example.

[0032] The touch display panel 100 is divided into a display area AA and a non-display area NA. The non-display area NA surrounds the display area AA. The display area AA is the area with display functionality. Of course, the display area AA may also include portions of the non-display area NA. For example, when a camera is placed within the display area AA and surrounded by it, the display area AA primarily has display functionality while also containing a small amount of non-display functionality. The non-display area NA surrounds the display area AA and includes some peripheral wiring required for display and other functions.

[0033] The non-display area NA includes an overlapping area NA1. The number of overlapping areas NA1 can be one or more. For example, when there is one overlapping area NA1, the overlapping area NA1 is located on the side of the non-display area NA away from the display area AA. When there are multiple overlapping areas NA1, the multiple overlapping areas NA1 can be arranged sequentially along a direction.

[0034] The substrate 1 may include various flexible or bendable materials, for example, polymer resins such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC) or cellulose acetate propionate (CAP).

[0035] The bridging area NA1 includes lead terminals 12 and a driver chip. The lead terminals 12 electrically connect the touch leads 22 to the driver chip, and the lead terminals 12 and the driver chip are co-layered. Optionally, in the bridging area NA1, the touch leads 22 and the lead terminals 12 may have multiple layers, and the touch leads 22 and the lead terminals 12 may be connected via transfer holes.

[0036] The touch electrode layer 2 includes multiple touch electrodes 21. Typically, at least some of the touch electrodes 21 are located in the display area AA. Pressing, for example, causes the capacitance between the touch electrodes 21 to change. Touch leads 22 connected to the touch electrodes 21 can transmit the signals generated by the capacitance change to the driver chip in the overlap area NA1 to implement the touch function. The touch electrodes 21 may include multiple drive electrodes and sensing electrodes, which intersect with each other. The touch leads 22 may include drive signal leads and sensing signal leads. The drive signal leads have one end connected to the drive electrode and the other end connected to the lead terminal 12. The sensing signal leads have one end connected to the sensing electrode and the other end connected to the lead terminal 12.

[0037] The functional conductive layer 11 may include a stacked driving circuit structure layer 111 and a light emitting device layer 112. The light emitting device layer 112 includes an anode, a light emitting layer, and a cathode.

[0038] The functional conductive layers 11 are insulated by an insulating film layer 13 to prevent short circuits between the functional conductive layers 11. For example, the multiple driving circuits in the driving circuit structure layer 111 are insulated by the insulating film layer 13. The driving circuit structure layer 111 is insulated from the light-emitting device layer 112 by the insulating film layer 13. The anode, light-emitting layer, and cathode in the light-emitting device layer 112 are insulated by the insulating film layer 13.

[0039] Of course, there is also an insulating film layer 13 between the touch electrode layer 2 and the functional layer, such as a packaging layer. Similarly, the multiple touch electrodes 21 and the multiple touch leads 22 in the touch electrode layer 2 also need to be insulated by the insulating film layer 13.

[0040] The protrusion 23 in the overlapping area NA1 is located between two adjacent touch leads 22. It is understandable that the protrusion 23 can be formed by a single film layer, or it can be composed of multiple film layers. The protrusion 23 can include an insulating film layer 13, or a metal layer, or a combination of an insulating film layer 13 and a metal layer. It should be noted that when the protrusion 23 includes a metal layer, the metal layer and the touch lead 22 are arranged in different layers. The metal layer is protruded compared to the film layer of the same layer in the display panel, thereby making the film layer on the side of the metal layer facing away from the substrate 1 in the protruding area of ​​the metal layer protrude compared to other areas, thereby achieving isolation between the two adjacent touch leads 22.

[0041] In the embodiment of the present application, the protrusion 23 is located in the overlapping area NA1 of the non-display area NA. The protrusion 23 can be manufactured together with the film layer in the display area AA, thereby reducing the manufacturing process links and lowering the production cost.

[0042] The touch display panel 100 and display device of the embodiment of the present application may have thickness differences due to process errors, which may lead to photoresist residues between adjacent touch leads 22 during the process of manufacturing the touch leads 22, thereby causing a short circuit between adjacent touch leads 22. By providing a protrusion 23 between adjacent touch leads 22 in the overlapping area NA1 of the display panel, the thickness differences between adjacent touch leads 22 are reduced, and an isolation structure is formed between adjacent touch leads 22, thereby reducing the possibility of photoresist residues between adjacent touch leads 22 during the process of manufacturing the touch leads 22, thereby reducing the possibility of short circuits between adjacent touch leads 22, and improving the production yield of the touch display panel 100.

[0043] Figure 4 Show Figure 1 Another cross-sectional view in the middle AA direction.

[0044] like Figure 4 As shown, as an optional embodiment, the functional conductive layer 11 includes a plurality of stacked conductive layers, and the protrusion 23 includes a first sub-portion 231 , which is disposed on the same layer as at least one of the plurality of conductive layers.

[0045] The functional conductive layer 11 includes multiple conductive layers stacked together, for example, a driving circuit structure layer 111 and a light-emitting device layer 112. The driving circuit structure layer 111 includes a source conductive layer, a drain conductive layer 1111, a gate conductive layer 1112, and other conductive layers. The light-emitting device layer 112 includes an anode conductive layer 1121 and a cathode conductive layer 1122. The first sub-portion 231 included in the protrusion 23 is arranged on the same layer as one or more of the multiple conductive layers. Exemplarily, the first sub-portion 231 is made of the same material as the conductive layer, for example, the first sub-portion 231 is made of the same material as the drain conductive layer 1111, and / or the first sub-portion 231 is made of the same material as the gate conductive layer 1112, and / or the first sub-portion 231 is made of the same material as the anode conductive layer 1121, and / or the first sub-portion 231 is made of the same material as the cathode conductive layer 1122. When manufacturing the conductive layer of the functional conductive layer 11 , the first sub-portion 231 can be formed at the same time, thereby avoiding adding additional manufacturing steps and reducing the manufacturing cost of the protrusion 23 .

[0046] Figure 5 Show Figure 1 Another cross-sectional view in the middle AA direction.

[0047] like Figure 5 As shown, as an optional embodiment, the protruding portion 23 further includes a second sub-portion 232 , and the second sub-portion 232 is provided in the same layer as the insulating film layer 13 .

[0048] The present embodiment does not limit the specific location of the insulating film layer 13 included in the second sub-section 232. Exemplarily, the insulating film layer 13 includes the insulating film layer 13 in the touch electrode layer 2, the insulating film layer 13 between the functional conductive layers 11, and the insulating film layer 13 between the touch electrode layer 2 and the functional conductive layer 11. For example, the insulating film layer 13 may include the encapsulation layer between the touch electrode layer 2 and the functional conductive layer 11, the pixel definition layer 132 and support pillars 133 in the functional conductive layer 11 located in the light-emitting device layer 112, and the planarization layer 131 in the drive circuit structure layer 111.

[0049] like Figure 5 As shown, the first sub-portion 231 and the second sub-portion 232 may be provided in the protruding portion 23 at the same time.

[0050] The second sub-portion 232 included in the protrusion 23 is arranged in the same layer as one or more layers of the multi-layer insulating film layer 13. For example, the second sub-portion 232 is made of the same material as the insulating film layer 13. When manufacturing the insulating film layer 13, the second sub-portion 232 can be formed at the same time, avoiding the addition of additional process steps and reducing the manufacturing cost of the protrusion 23.

[0051] Figure 6 Showing an example Figure 1 A partial magnified view of the middle Q region.

[0052] like Figure 6 As shown, as an optional embodiment, the protrusion 23 includes a plurality of sub-areas 233 arranged in sequence along the extension direction, and the plurality of sub-areas 233 are respectively arranged in a one-to-one correspondence with the plurality of insulating film layers 13, and / or the plurality of sub-areas 233 are respectively arranged in a one-to-one correspondence with the plurality of conductive layers.

[0053] The protrusion 23 includes a plurality of sub-regions 233 sequentially arranged along the extension direction. For example, the protrusion 23 is equally divided into N sub-regions 233 along the extension direction, wherein the i-th sub-region 233 is arranged in the same layer as the encapsulation layer in the insulating film layer 13, the i+1-th sub-region 233 is arranged in the same layer as the planarization layer 131 in the insulating film layer 13, the j-th sub-region 233 is arranged in the same layer as the source conductive layer in the conductive layer, and the j+1-th sub-region 233 is arranged in the same layer as the anode conductive layer 1121 in the conductive layer. Of course, the protrusion 23 can also be divided into N unequal sub-regions 233 along the extension direction. It should be noted that N is a natural number greater than zero, and i and j are natural numbers in N.

[0054] In this embodiment, the protrusion 23 is divided into a plurality of sub-areas 233 so that the protrusion 23 has different thicknesses in different areas of the non-display area NA, thereby specifically reducing the step difference in thickness of different areas and reducing the possibility that the protruding area of ​​the protrusion 23 affects the thickness of the touch display panel 100.

[0055] Please continue reading Figure 5 As an optional embodiment, along the light emitting direction Z of the touch display panel 100, the protrusion 23 is larger than the touch lead 22. Furthermore, the protrusion 23 is a strip-shaped structure. During the formation process of the touch lead 22, a metal layer is attached to the side of the touch display panel 100 facing the light emitting surface, and a photoresist is applied to the side of the metal layer facing away from the substrate 1. After photolithography, exposure and development, and etching, multiple independent touch leads 22 are formed. The size of the protrusion 23 between two adjacent touch leads 22 along the light emitting direction Z of the touch display panel 100 is larger than the size of the touch lead 22 along the light emitting direction Z of the touch display panel 100, so that a step difference is formed between the area where the photoresist covers the touch lead 22 and the area where the photoresist covers the protrusion 23. After exposure and development, the photoresist in the area where the photoresist covers the protrusion 23 can be completely removed, thereby reducing the possibility of photoresist residue, reducing the possibility of short circuit between two adjacent touch leads 22, and improving the yield rate of the touch lead 22 molding process.

[0056] Please continue reading Figure 5As an optional embodiment, the touch lead 22 is overlapped and connected to the lead terminal 12 through a via 25, and the projection of the via 25 along the light emitting direction Z of the touch display panel 100 is located between the projections of two adjacent protrusions 23 along the light emitting direction Z of the touch display panel 100.

[0057] Specifically, the vias 25 penetrate the film layer between the touch lead 22 and the lead terminal 12 to achieve electrical connection between the touch lead 22 and the lead terminal 12. Optionally, a touch lead 22 can be connected to the corresponding lead terminal 12 through multiple vias 25 to improve the reliability of the connection between the touch lead 22 and the lead terminal 12.

[0058] The projection of the via 25 along the light emitting direction Z of the touch display panel 100 is located between the projections of two adjacent protrusions 23 along the light emitting direction Z of the touch display panel 100. Specifically, the projection of one or more vias 25 between a touch lead 22 and the corresponding lead terminal 12 along the light emitting direction Z of the touch display panel 100 is located between the projections of two adjacent protrusions 23 along the light emitting direction Z of the touch display panel 100.

[0059] Please continue reading Figure 6 As an optional embodiment, the edge of the protrusion 23 along the first direction X exceeds the edge of the touch lead 22 along the first direction X, and the first direction X is parallel to the direction from the display area AA to the overlapping area NA1.

[0060] Specifically, the touch leads 22 extend from the display area AA to the non-display area NA in the first direction X. The edge of the protrusion 23 in the non-display area NA along the first direction X extends beyond the edge of the touch lead 22 along the first direction X, thereby reducing the risk of short circuits between the edges of two adjacent touch leads 22 along the first direction X after molding. It should be understood that in this embodiment of the present application, the edge includes the edge region between the protrusion 23 and the touch lead 22 in the overlapping area NA1 between the touch lead 22 and the lead terminal 12.

[0061] Figure 7 Schematic diagram of the structure of touch display panels according to some other embodiments of the present application.

[0062] like Figure 7 As shown, as an optional embodiment, the non-display area NA further includes a wiring area NA2 , the wiring area NA2 is located between the display area AA and the overlapping area NA1 , and the protrusion 23 extends from the wiring area NA2 to the overlapping area NA1 .

[0063] like Figure 7As shown, the touch electrodes 21 include first touch electrodes 211 and second touch electrodes 212, both located in the display area AA. The first touch electrodes 211 extend along a first direction X, and the second touch electrodes 212 extend along a second direction Y. The touch leads 22 include first touch leads 221 and second touch leads 222. Each side of the first touch electrodes 211 along the first direction X is connected to a plurality of first touch leads 221 in a one-to-one correspondence. The ends of the first touch leads 221 connected to the first touch electrodes 211 extend from the display area AA into the non-display area NA and then extend along the second direction Y within the non-display area NA to the wiring area NA2. Each side of the second touch electrodes 212 along the second direction Y, near the wiring area NA2, is connected to a plurality of second touch leads 222 in a one-to-one correspondence. One end of the second touch lead 222 connected to the second touch electrode 212 extends from the display area AA to the wiring area NA2 of the non-display area NA. The lead terminal 12 in the overlapping area NA1 includes a first lead terminal 121 and a second lead terminal 122. The first touch lead 221 extending into the wiring area NA2 extends through the wiring area NA2 to the overlapping area NA1 and is electrically connected to the first lead terminal 121. The second touch lead 222 extending into the wiring area NA2 extends through the wiring area NA2 to the overlapping area NA1 and is electrically connected to the second lead terminal 122.

[0064] The first touch leads 221 and the second touch leads 222 are gradually clustered in the wiring area NA2 in the direction from the display area AA to the overlapping area NA1, thereby reducing the space occupied by the first touch leads 221 and the second touch leads 222 in the non-display area NA. A protrusion 23 is also provided in the wiring area NA2 to reduce the risk of short circuit between the touch leads 22 in the wiring area NA2.

[0065] like Figure 6 and Figure 7 As shown in FIG. 1 , as an optional embodiment, the extending direction of the protrusion 23 is parallel to the extending direction of the adjacent touch lead 22 from the wiring area NA2 to the overlapping area NA1 .

[0066] In some optional embodiments, the touch leads 22 may be bundled in the wiring area NA2 by extending along the first direction X to a predetermined area of ​​the wiring area NA2, then being bundled along the second direction Y, and then extending to the overlapping area NA1 along the first direction X. In other optional embodiments, the touch leads 22 may be bundled in the wiring area NA2 by extending along the first direction X to a predetermined area of ​​the wiring area NA2, and then gradually approaching each other along the direction from the display area AA to the overlapping area NA1 until they extend into the overlapping area NA1.

[0067] In the embodiment of the present application, the extension direction of the protrusion 23 is parallel to the extension direction of the touch lead 22, thereby preventing the protrusion 23 from interfering with the touch lead 22. It should be noted that the embodiment of the present application does not limit the extension direction of the touch lead 22 or the protrusion 23, as long as the protrusion 23 does not interfere with the arrangement position of the touch lead 22 after molding.

[0068] On the other hand, embodiments of the present application further provide a display device, comprising any of the above-described touch display panels 100. Since the display device provided by embodiments of the present application comprises the touch display panel 100 of any of the above-described embodiments, the display device provided by embodiments of the present application has the beneficial effects of the touch display panel 100 of any of the above-described embodiments, which will not be further elaborated here.

[0069] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0070] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A touch display panel, characterized in that: The touch display panel includes a display area and a non-display area, wherein the non-display area includes an overlap area, and the touch display panel includes: A substrate comprising a functional conductive layer and lead terminals extending from the functional conductive layer to the bonding area; A touch electrode layer, comprising a plurality of touch electrodes located in the display area and a plurality of touch leads extending from the display area to the overlapping area, wherein the touch leads are overlapped and connected to the lead terminals in the overlapping area; Wherein, adjacent functional conductive layers and adjacent touch electrode layers are insulated by an insulating film layer, and a protrusion is provided between adjacent touch leads in the overlapping area, and the protrusion includes at least one insulating film layer; An edge of the protruding portion along a first direction exceeds an edge of the touch lead along the first direction, and the first direction is parallel to a direction from the display area to the overlapping area.

2. The touch display panel according to claim 1, wherein: The functional conductive layer includes a plurality of conductive layers stacked together, and the protruding portion includes a first sub-portion, which is arranged on the same layer as at least one layer of the plurality of conductive layers.

3. The touch display panel according to claim 2, wherein: The protruding portion further includes a second sub-portion, and the second sub-portion is arranged in the same layer as the insulating film layer.

4. The touch display panel according to claim 2, wherein: The protrusion includes a plurality of sub-regions sequentially arranged along the extension direction, and the plurality of sub-regions are respectively arranged in a one-to-one correspondence with a plurality of insulating film layers, and / or the plurality of sub-regions are respectively arranged in a one-to-one correspondence with a plurality of conductive layers.

5. The touch display panel according to claim 1, wherein: Along the light emitting direction of the touch display panel, the size of the protrusion is larger than the size of the touch lead.

6. The touch display panel according to claim 1, wherein: The protrusion is a strip structure.

7. The touch display panel according to claim 1, wherein: The touch lead is overlapped and connected to the lead terminal through a via hole, and the projection of the via hole along the light emitting direction of the touch display panel is located between the projections of two adjacent protrusions along the light emitting direction of the touch display panel.

8. The touch display panel according to claim 1, wherein: The non-display area further includes a wiring area, wherein the wiring area is located between the display area and the overlapping area, and the protrusion extends from the wiring area to the overlapping area.

9. The touch display panel according to claim 8, wherein: An extending direction of the protruding portion is parallel to an extending direction of the adjacent touch lead from the wiring area to the overlapping area.

10. A display device, characterized in that: The touch display panel comprises the touch display panel according to any one of claims 1 to 9.

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