Touch display panel and display device

Abstract

The embodiments of the present application provide a touch display panel and a display device, which relate to the field of display technology and are used to solve the technical problem of water and oxygen entering the touch function layer and corroding the metal layer. The touch display panel has a display area and a non-display area; the touch display panel includes a substrate, and an encapsulation layer and a touch function layer stacked on the substrate. In the non-display area, at least one dam is provided on the substrate; the encapsulation layer covers the side surfaces of the dam and the top surface of the dam facing away from the substrate; the touch function layer includes at least one metal layer; the touch display panel also includes an inorganic protective layer, which is provided on the side of the metal layer facing away from the encapsulation layer, and the orthographic projection of the inorganic protective layer on the substrate covers the orthographic projection of the dam on the substrate. The touch display panel has a strong water and oxygen barrier capability, which can prevent water and oxygen from invading the metal layer and corroding the metal layer.

Description

Technical Field

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

[0002] With the development of display technology, display panels with touch functionality, or touch display panels, have become widely used. In related technologies, a touch display panel has a display area and a non-display area connected to the display area. Within the non-display area, the touch display panel typically includes a substrate, an encapsulation layer, and a touch function layer stacked on the substrate. The substrate is provided with a dam, and both the encapsulation layer and the touch function layer cover the dam.

[0003] However, in the area of ​​the touch function layer corresponding to the bottom corner of the dam, water and oxygen can easily enter the touch function layer from this area, causing corrosion to the metal layer in the touch function layer, thereby affecting the touch function of the touch display panel. Summary of the Invention

[0004] In view of the above problems, embodiments of the present application provide a touch display panel and a display device to solve the technical problem that water and oxygen enter the touch function layer and corrode the metal layer, thereby affecting the touch function of the touch display panel.

[0005] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0006] According to a first aspect of an embodiment of the present application, a touch display panel is provided. The touch display panel has a display area and a non-display area connected to the periphery of the display area. The touch display panel includes a substrate, and an encapsulation layer and a touch function layer stacked on the substrate. Within the non-display area, at least one dam is provided on the substrate. The encapsulation layer covers the side surfaces of the dam and the top surface of the dam facing away from the substrate. The touch function layer includes at least one metal layer.

[0007] The touch display panel further includes an inorganic protective layer, which is disposed on a side of the metal layer facing away from the encapsulation layer. The orthographic projection of the inorganic protective layer on the substrate covers the orthographic projection of the dam on the substrate.

[0008] In the touch display panel of the embodiment of the present application, the inorganic protective layer is arranged on the side of the metal layer in the touch function layer facing away from the encapsulation layer, and the orthographic projection of the inorganic protective layer on the substrate covers the orthographic projection of the dam on the substrate. The inorganic protective layer can block water and oxygen from the metal layer in the area corresponding to the dam in the touch function layer, preventing water and oxygen from invading the metal layer in this area and corroding the metal layer, thereby ensuring the touch function of the touch display panel.

[0009] In some possible implementations, the metal layer includes a first metal layer and a second metal layer;

[0010] The touch function layer further includes a touch substrate, an insulating layer and an organic protective layer. The touch substrate, the first metal layer, the insulating layer, the second metal layer and the organic protective layer are sequentially stacked on a side of the encapsulation layer facing away from the base.

[0011] In some possible implementations, the inorganic protective layer is located on a surface of the organic protective layer facing away from the second metal layer.

[0012] In some possible implementations, the inorganic protective layer is located between the organic protective layer and the second metal layer, and covers a portion of the surface of the second metal layer; a portion of the surface of the second metal layer covers at least the top surface, side surfaces of the dam, and the surface where the bottom angle is formed by the substrate; the organic protective layer covers the inorganic protective layer, and the portion of the surface of the second metal layer not covered by the inorganic protective layer.

[0013] In some possible implementations, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence on the substrate; the first inorganic encapsulation layer extends from the display area to the non-display area and covers the side and top surfaces of the dam; the organic encapsulation layer is located on the side of the dam facing the display area and covers part of the surface of the first inorganic encapsulation layer; the second inorganic encapsulation layer covers the organic encapsulation layer and covers the portion of the surface of the first inorganic encapsulation layer not covered by the organic encapsulation layer.

[0014] In some possible implementations, the inorganic protection layer and the second inorganic encapsulation layer are made of the same material.

[0015] In some possible implementations, the second inorganic encapsulation layer includes a first encapsulation portion and a second encapsulation portion spaced apart from each other, a first disconnection region is provided between the first encapsulation portion and the second encapsulation portion, the first disconnection region having an orthographic projection on the substrate covering an orthographic projection of the dam on the substrate, and an area of ​​the orthographic projection of the first disconnection region on the substrate being larger than an area of ​​the orthographic projection of the dam on the substrate;

[0016] The touch substrate, the first metal layer, the insulating layer, and the second metal layer are sequentially filled in the first disconnected area, and a recessed portion is formed on a surface of the second metal layer facing away from the first metal layer, and the recessed portion surrounds the dam; the inorganic protective layer covers the surface of the second metal layer and is filled in the recessed portion.

[0017] In some possible implementations, a surface of the inorganic protective layer filling the recessed portion is flush with a surface of the recessed portion.

[0018] In some possible implementations, the insulating layer includes a first insulating portion and a second insulating portion spaced apart from each other, a second disconnected region exposing the first metal layer is formed between the first insulating portion and the second insulating portion, an orthographic projection of the second disconnected region on the substrate covers an orthographic projection of the dam on the substrate, and an area of ​​the orthographic projection of the second disconnected region on the substrate is larger than an area of ​​the orthographic projection of the dam on the substrate; the inorganic protective layer is located in the second disconnected region and covers at least a portion of the exposed surface of the first metal layer;

[0019] The second metal layer includes a first metal part and a second metal part arranged at intervals, with a third disconnection area between the first metal part and the second metal part, and the orthographic projection of the third disconnection area on the substrate covers the orthographic projection of the dam on the substrate; the first metal part and the second metal part are both electrically connected to the first metal layer.

[0020] In some possible implementations, both the first metal portion and the second metal portion are electrically connected to the first metal layer through vias.

[0021] In some possible implementations, the via includes a first via and a second via, the first via is formed between the inorganic protective layer and the first insulating part, and the first via exposes the first metal layer; the second via is formed between the inorganic protective layer and the second insulating part, and the second via exposes the first metal layer; the first metal part and the second metal part are electrically connected to the first metal layer through the first via and the second via, respectively.

[0022] In some possible implementations, the via includes a third via and a fourth via, the third via is arranged in the first insulating part; the fourth via is arranged in the second insulating part; the first metal part and the second metal part are electrically connected to the first metal layer through the third via and the fourth via, respectively.

[0023] A second aspect of an embodiment of the present application provides a display device, comprising the touch display panel as described in any one of the above items.

[0024] Since the display device according to the embodiment of the present application includes any of the above-mentioned touch display panels, the display device also has the advantages of any of the above-mentioned touch display panels, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the top view of the touch display panel according to an embodiment of the present application;

[0027] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at the middle BB;

[0028] Figure 3 Schematic diagram of the cross-sectional structure at BB in some possible implementations of the embodiments of the present application;

[0029] Figure 4 Schematic diagram of the cross-sectional structure at BB in some other possible implementations of the embodiments of the present application;

[0030] Figure 5 Schematic diagram of the cross-sectional structure at BB in some other possible implementations of the embodiments of the present application;

[0031] Figure 6 Schematic diagram of the cross-sectional structure at BB in some other possible implementations of the embodiments of the present application.

[0032] Description of reference numerals:

[0033] 10. Base;

[0034] 110. embankment;

[0035] 20. Encapsulation layer;

[0036] 210. First inorganic encapsulation layer;

[0037] 220, organic encapsulation layer;

[0038] 230, second inorganic encapsulation layer;

[0039] 231, first packaging unit;

[0040] 232, second packaging unit;

[0041] 233, first disconnection zone;

[0042] 30. Touch function layer;

[0043] 310, touch substrate;

[0044] 320, first metal layer;

[0045] 330, insulation layer;

[0046] 331, first insulating portion;

[0047] 332, second insulating portion;

[0048] 333, third via;

[0049] 334, fourth via;

[0050] 335, second disconnection zone;

[0051] 340, second metal layer;

[0052] 341, first metal part;

[0053] 342, second metal part;

[0054] 343, the third disconnection zone;

[0055] 350, organic protective layer;

[0056] 360, recessed part;

[0057] 40. Inorganic protective layer;

[0058] 410, first via;

[0059] 420. Second via. DETAILED DESCRIPTION

[0060] In related art, a touch display panel has a display area and a non-display area connected to the display area. Within the non-display area, the touch display panel typically includes a substrate, an encapsulation layer, and a touch function layer stacked sequentially on the substrate. The substrate is provided with a dam, and both the encapsulation layer and the touch function layer cover the dam. The touch function layer typically includes a touch substrate, a first metal layer, an inorganic insulating layer, a second metal layer, and an organic protective layer stacked sequentially.

[0061] As described in the background, touch display panels in related art suffer from the technical problem of water and oxygen easily entering the touch functional layer from the area corresponding to the bottom corner of the dam, causing corrosion to the metal layer. The inventors, through extensive research, have discovered that this problem stems from the fact that the touch functional layer overlies the dam, creating a recessed area in the area corresponding to the bottom corner of the dam, where water and oxygen easily accumulate. Because the organic protective layer in the touch functional layer has limited water and oxygen barrier capabilities, water and oxygen easily pass through the organic protective layer and come into contact with the second and first metal layers, causing corrosion to the second and first metal layers, thereby affecting the touch function of the touch display panel.

[0062] To address the aforementioned technical issues, the touch display module of the present embodiment is provided with an inorganic protective layer. The inorganic protective layer is located on the side of the metal layer in the touch functional layer that faces away from the encapsulation layer. The orthographic projection of the inorganic protective layer on the substrate covers the orthographic projection of the dam on the substrate. The inorganic protective layer protects the area of ​​the touch functional layer corresponding to the dam, preventing water and oxygen from invading the metal layer in this area and corroding the metal layer, thereby ensuring the touch function of the touch display panel.

[0063] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0064] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only intended to illustrate the contents of the embodiments of the present application. In addition, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0065] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in the singular sense, or may be used to describe a combination of features, structures, or characteristics in the plural sense, depending, at least in part, on the context.

[0066] Generally speaking, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of such features.

[0067] refer to Figure 1 and Figure 2The touch display panel of an embodiment of the present application includes a display area AA and a non-display area NA connected to the periphery of the display area AA. For example, the display area AA includes a plurality of pixels arranged in a regular pattern, which emit light to display images, thereby realizing the display function of the touch display panel. The non-display area NA is used to arrange connection wires for connection to an external circuit board, etc. The touch display panel includes a substrate 10, and an encapsulation layer 20 and a touch function layer 30 stacked on the substrate 10. Within the non-display area, at least one dam 110 is provided on the substrate 10. The encapsulation layer 20 covers the side surfaces of the dam 110 and the top surface of the dam 110 facing away from the substrate 10. The touch function layer 30 includes at least one metal layer. The touch display panel may further include an inorganic protective layer 40, which is disposed on the side of the metal layer facing away from the encapsulation layer 20. The orthographic projection of the inorganic protective layer 40 on the substrate 10 covers the orthographic projection of the dam 110 on the substrate 10. The inorganic protective layer 40 can protect the metal layer in the area corresponding to the dam 110 in the touch function layer 30 to improve the water and oxygen barrier capacity of the area, prevent water and oxygen from invading the metal layer from the area and corroding the metal layer, thereby ensuring the touch function of the touch display panel.

[0068] refer to Figure 1 and Figure 2 The substrate 10 provides support for the touch display panel's encapsulation layer 20, touch function layer 30, and other film layers. For example, the substrate 10 may include a stacked base layer and a barrier layer. The base layer may be a rigid substrate, such as a stainless steel plate. Alternatively, the base layer may be a flexible substrate, such as polyimide, polyethylene terephthalate, or polycarbonate. The barrier layer is located on the base layer and may be made of an inorganic insulating material such as silicon nitride or silicon oxide.

[0069] Within the display area AA, a drive layer and a device layer may be stacked on the substrate 10. The drive layer includes a plurality of regularly arranged pixel drive circuits. The device layer includes a plurality of regularly arranged pixels. The plurality of pixel drive circuits in the drive layer are correspondingly disposed and electrically connected to the plurality of pixels in the device layer. The pixel drive circuits control the pixels in the display area AA to emit light, thereby realizing the image display function of the touch display panel.

[0070] Within the non-display area NA, at least one dam 110 may be provided on the substrate 10. The dam 110 serves to block the organic encapsulation layer within the encapsulation layer 20, preventing it from overflowing outside the non-display area NA. For example, the dam 110 may surround the display area AA. The dam 110 may have a multi-layer structure, with any layer within the multi-layer structure being co-located with a film layer within the drive layer and device layer within the display area AA, such as a planarization layer or pixel definition layer, to reduce process steps and improve the production efficiency of the touch display panel.

[0071] For example, the number of the dam 110 can be one or more. Figure 2 As shown in FIG, there are two dams 110. The heights of the two dams 110 can be the same or different. Figure 2 As shown in , the height of the dam 110 away from the display area AA can be greater than the height of the dam 110 close to the display area AA, thereby improving the barrier capability of the dam 110 to the organic encapsulation layer in the encapsulation layer 20. It should be noted that the height of the dam 110 refers to the height of the dam 110 in a direction perpendicular to the substrate 10.

[0072] The touch display panel also includes an encapsulation layer 20. Within the display area AA, the encapsulation layer 20 covers the device layer to encapsulate the device layer, preventing water and oxygen from entering the device layer and corroding the luminescent materials within the device layer, thereby ensuring the display function of the touch display panel. The encapsulation layer 20 can extend from the display area AA into the non-display area NA to increase the area of ​​water and oxygen barrier from the device layer.

[0073] For example, refer to Figure 2 , the encapsulation layer 20 may include a first inorganic encapsulation layer 210, an organic encapsulation layer 220, and a second inorganic encapsulation layer 230. The first inorganic encapsulation layer 210, the organic encapsulation layer 220, and the second inorganic encapsulation layer 230 are sequentially stacked on the substrate 10. The first inorganic encapsulation layer 210 extends from the display area AA to the non-display area NA and covers the side and top surfaces of the dam 110. The top surface of the dam 110 refers to the surface of the dam 110 facing away from the substrate 10. That is, the first inorganic encapsulation layer 210 crosses the dam 110. The organic encapsulation layer 220 is located on the side of the dam 110 facing the display area AA and covers part of the surface of the first inorganic encapsulation layer 210. The second inorganic encapsulation layer 230 covers the organic encapsulation layer 220 and covers the portion of the surface of the first inorganic encapsulation layer 210 that is not covered by the organic encapsulation layer 220.

[0074] The touch function layer 30 is formed on the side of the encapsulation layer 20 facing away from the substrate 10, and is used to realize the touch function of the touch display panel. The touch function layer 30 has a metal layer as a touch electrode. For example, the number of metal layers can be one or two. Figure 2 As shown in , the metal layer may include a first metal layer 320 and a second metal layer 340. The touch function layer 30 may further include a touch substrate 310, an insulating layer 330, and an organic protective layer 350. The touch substrate 310, the first metal layer 320, the insulating layer 330, the second metal layer 340, and the organic protective layer 350 are sequentially stacked and disposed on the side of the encapsulation layer 20 facing away from the substrate 10. Exemplarily, the first metal layer 320 and the second metal layer 340 are both touch traces.

[0075] The inorganic protective layer 40 is disposed on the side of the metal layer facing away from the encapsulation layer 20. The orthographic projection of the inorganic protective layer 40 on the substrate 10 covers the orthographic projection of the dam 110 on the substrate 10. The inorganic protective layer 40 can protect the metal layer in the area of ​​the touch function layer 30 corresponding to the dam 110, and can work together with the organic protective layer 350 to block water and oxygen in this area, thereby improving the water and oxygen barrier capability of this area, thereby preventing water and oxygen from invading the metal layer from this area and corroding the metal layer, thereby ensuring the touch function of the touch display panel. For example, the material of the inorganic protective layer 40 can be the same as that of the second inorganic encapsulation layer 230.

[0076] For example, refer to Figure 2 The inorganic protective layer 40 can be located on the surface of the organic protective layer 350 facing away from the second metal layer 340. With this arrangement, the manufacturing process of the inorganic protective layer 40 is simple, which can improve the production efficiency of the touch display panel.

[0077] refer to Figure 3 In some possible implementations of the present invention, the inorganic protective layer 40 may also be located between the organic protective layer 350 and the second metal layer 340, and cover a portion of the surface of the second metal layer 340. The portion of the surface of the second metal layer 340 covers at least the top surface and side surfaces of the dam 110 and the surface of the substrate 10 forming the bottom angle. The bottom angle refers to the Figure 3 The obtuse angle formed between the side of the dam 110 and the upper surface of the substrate 10 is shown; the surface of the substrate 10 forming the bottom angle refers to the area of ​​the upper surface of the substrate 10 near the side of the dam 110. The organic protective layer 350 covers the inorganic protective layer 40 and the portion of the second metal layer 340 not covered by the inorganic protective layer 40. This arrangement allows the inorganic protective layer 40 to directly contact the second metal layer 340, enhancing the inorganic protective layer 40's ability to block water and oxygen from the second metal layer 340, further preventing water and oxygen from invading the second metal layer 340 and causing corrosion.

[0078] refer to Figure 4In other possible implementations of the present invention, the second inorganic encapsulation layer 230 may include a first encapsulation portion 231 and a second encapsulation portion 232 spaced apart from each other. A first disconnected region 233 is defined between the first encapsulation portion 231 and the second encapsulation portion 232, exposing the first inorganic encapsulation layer 210. The orthographic projection of the first disconnected region 233 on the substrate 10 overlaps the orthographic projection of the dam 110 on the substrate 10, and the orthographic projection of the first disconnected region 233 on the substrate 10 is larger than the orthographic projection of the dam 110 on the substrate 10. The touch control substrate 310, the first metal layer 320, the insulating layer 330, and the second metal layer 340 fill the first disconnected region 233. A recess 360 is formed on the surface of the second metal layer 340 facing away from the first metal layer 320, and the recess 360 surrounds the dam 110. An inorganic protective layer 40 covers the surface of the second metal layer 340 and fills the recess 360, thereby reducing the distance between the inorganic protective layer 40 and the substrate 10.

[0079] For example, refer to Figure 4 The surface of the inorganic protective layer 40 filling the recessed portion 360 can be flush with the surface of the recessed portion 360. This configuration allows the surface of the inorganic protective layer 40 and the surface of the second metal layer 340 to form a flat surface, making it easier to arrange other film layers thereon, thereby improving the flatness of the touch display panel.

[0080] refer to Figure 5 In other possible implementations of the embodiments of the present application, the insulating layer may include a first insulating portion 331 and a second insulating portion 332 spaced apart from each other. A second disconnected region 335 is formed between the first insulating portion 331 and the second insulating portion 332, exposing the first metal layer 320. The orthographic projection of the second disconnected region 335 on the substrate 10 overlaps the orthographic projection of the dam 110 on the substrate 10, and the area of ​​the orthographic projection of the second disconnected region 335 on the substrate 10 is larger than the area of ​​the orthographic projection of the dam 110 on the substrate 10. The inorganic protective layer 40 is located within the second disconnected region 335 and covers at least a portion of the exposed surface of the first metal layer 320. The second metal layer includes a first metal portion 341 and a second metal portion 342 spaced apart from each other, with a third disconnected region 343 between them. The orthographic projection of the third disconnected region 343 on the substrate 10 overlaps the orthographic projection of the dam 110 on the substrate 10. Both the first metal portion 341 and the second metal portion 342 are electrically connected to the first metal layer 320.

[0081] A second disconnection zone 335 is set on the insulating layer 330, and a third disconnection zone 343 is set on the second metal layer 340, that is, the areas of the insulating layer 330 and the second metal layer 340 corresponding to the dam 110 are removed, which can reduce the number of metal layers in the area corresponding to the dam 110, which is equivalent to enhancing the ability of the inorganic protective layer 40 to block water and oxygen from the metal layer in the area, thereby further preventing the metal layer from being corroded by water and oxygen and affecting the touch function of the touch display panel.

[0082] The first metal portion 341 and the second metal portion 342 are both electrically connected to the first metal layer 320 to ensure signal transmission of the touch function layer 30. For example, the first metal portion 341 and the second metal portion 342 can be electrically connected to the first metal layer 320 through vias. Figure 5 The vias may include a first via 410 and a second via 420. The first via 410 is formed between the inorganic protective layer 40 and the first insulating portion 331, and the second via 420 is formed between the inorganic protective layer 40 and the second insulating portion 332. The first metal portion 341 and the second metal portion 342 are electrically connected to the first metal layer 320 through the first via 410 and the second via 420, respectively.

[0083] refer to Figure 6 In some other possible implementations of the embodiment of the present application, the vias may also include a third via 333 and a fourth via 334. The third via 333 is provided on the first insulating portion 331, and the fourth via 334 is provided on the second insulating portion 332. The first metal portion 341 and the second metal portion 342 are electrically connected to the first metal layer 320 through the third via 333 and the fourth via 334, respectively.

[0084] A second aspect of an embodiment of the present application provides a display device, comprising a touch display panel as described above.

[0085] Since the display device according to the embodiment of the present application includes any of the above-mentioned touch display panels, the display device also has the advantages of any of the above-mentioned touch display panels, which will not be described in detail here.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A touch display panel, characterized in that: The touch display panel has a display area and a non-display area connected to the periphery of the display area; the touch display panel includes a substrate, and an encapsulation layer and a touch function layer stacked on the substrate, and at least one dam is provided on the substrate in the non-display area; The encapsulation layer covers the side surfaces of the dam and the top surface of the dam facing away from the substrate; The touch function layer includes a metal layer; The touch display panel further includes an inorganic protective layer, which is disposed on a side of the metal layer facing away from the encapsulation layer, and the orthographic projection of the inorganic protective layer on the substrate covers the orthographic projection of the dam on the substrate; The metal layer includes a first metal layer and a second metal layer; The touch function layer further includes a touch substrate, an insulating layer and an organic protective layer. The touch substrate, the first metal layer, the insulating layer, the second metal layer and the organic protective layer are sequentially stacked on a side of the encapsulation layer facing away from the base.

2. The touch display panel according to claim 1, wherein: The inorganic protective layer is located on a surface of the organic protective layer facing away from the second metal layer.

3. The touch display panel according to claim 1, wherein: The inorganic protective layer is located between the organic protective layer and the second metal layer, and covers a portion of the surface of the second metal layer; a portion of the surface of the second metal layer covers at least the top surface, side surfaces and the surface of the substrate forming the bottom corner of the dam; the organic protective layer covers the inorganic protective layer and the portion of the surface of the second metal layer not covered by the inorganic protective layer.

4. The touch display panel according to claim 3, wherein: The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence on the substrate; the first inorganic encapsulation layer extends from the display area to the non-display area and covers the side and top surfaces of the dam; the organic encapsulation layer is located on the side of the dam facing the display area and covers part of the surface of the first inorganic encapsulation layer; the second inorganic encapsulation layer covers the organic encapsulation layer and covers the part of the surface of the first inorganic encapsulation layer not covered by the organic encapsulation layer.

5. The touch display panel according to claim 4, wherein: The inorganic protective layer and the second inorganic encapsulation layer are made of the same material.

6. The touch display panel according to claim 5, wherein: The second inorganic encapsulation layer includes a first encapsulation portion and a second encapsulation portion spaced apart from each other, a first disconnection region is provided between the first encapsulation portion and the second encapsulation portion, the first disconnection region has an orthographic projection on the substrate covering an orthographic projection of the dam on the substrate, and an area of ​​the orthographic projection of the first disconnection region on the substrate is larger than an area of ​​the orthographic projection of the dam on the substrate; The touch substrate, the first metal layer, the insulating layer, and the second metal layer are sequentially filled in the first disconnected area, and a recessed portion is formed on a surface of the second metal layer facing away from the first metal layer, and the recessed portion surrounds the dam; the inorganic protective layer covers the surface of the second metal layer and is filled in the recessed portion.

7. The touch display panel according to claim 6, wherein: The surface of the inorganic protective layer filling the recessed portion is flush with the surface of the recessed portion.

8. The touch display panel according to claim 1, wherein: The insulating layer includes a first insulating portion and a second insulating portion spaced apart from each other, a second disconnected region exposing the first metal layer is formed between the first insulating portion and the second insulating portion, an orthographic projection of the second disconnected region on the substrate covers an orthographic projection of the dam on the substrate, and an orthographic projection area of ​​the second disconnected region on the substrate is larger than an orthographic projection area of ​​the dam on the substrate; the inorganic protective layer is located in the second disconnected region and covers at least a portion of the exposed surface of the first metal layer; The second metal layer includes a first metal part and a second metal part arranged at intervals, with a third disconnection area between the first metal part and the second metal part, and the orthographic projection of the third disconnection area on the substrate covers the orthographic projection of the dam on the substrate; the first metal part and the second metal part are both electrically connected to the first metal layer.

9. The touch display panel according to claim 8, wherein: The first metal portion and the second metal portion are both electrically connected to the first metal layer through vias.

10. The touch display panel according to claim 9, wherein: The vias include a first via and a second via, wherein the first via is formed between the inorganic protective layer and the first insulating portion, and the first via exposes the first metal layer; the second via is formed between the inorganic protective layer and the second insulating portion, and the second via exposes the first metal layer; the first metal portion and the second metal portion are electrically connected to the first metal layer through the first via and the second via, respectively; Alternatively, the via hole includes a third via hole and a fourth via hole, and the third via hole is provided in the first insulating portion; The fourth via hole is provided in the second insulating portion; the first metal portion and the second metal portion are electrically connected to the first metal layer through the third via hole and the fourth via hole, respectively.

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

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