Display panel and display device

Abstract

This invention discloses a display panel and a display device. The display panel includes: a substrate; a first dielectric stack structure located on one side of the substrate, wherein a metal buffer structure is disposed in the first dielectric stack structure; a second dielectric stack structure located on the side of the first dielectric stack structure away from the substrate; the display panel further includes a via penetrating at least a portion of the second dielectric stack structure; along the thickness direction of the display panel, the metal buffer structure at least partially overlaps with the bottom edge region of the via. By providing a metal buffer structure in the first dielectric stack structure, the metal buffer structure can effectively suppress the risk of crack propagation in the second dielectric stack structure, ensuring the structural stability of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] During the manufacturing process of the display panel, different film layers need to be connected through line exchange holes. However, line exchange holes can easily cause local structural discontinuities in the film layers. This makes the angle between the sidewall and the bottom plane prone to stress concentration and cracking under high temperature and high humidity conditions. The cracks can spread to the entire panel, which can easily damage the panel structure. This makes it impossible to guarantee the stability of the panel during operation, thus failing to meet the user's needs and reducing the user experience. Summary of the Invention

[0003] This invention provides a display panel and a display device to improve the structural stability of the display panel and ensure its display effect.

[0004] In a first aspect, the present invention provides a display panel, characterized in that it comprises: Substrate; A first dielectric stack structure located on one side of the substrate, wherein a metal buffer structure is provided in the first dielectric stack structure; A second dielectric stack structure located on the side of the first dielectric stack structure away from the substrate; The display panel further includes a via penetrating at least a portion of the second dielectric stack structure; along the thickness direction of the display panel, the metal buffer structure at least partially overlaps with the bottom edge region of the via.

[0005] In a second aspect, the present invention provides a display device comprising the display panel described in any one of the first aspects.

[0006] The technical solution of this invention provides a display panel comprising: a substrate; a first dielectric stack structure located on one side of the substrate, wherein a metal buffer structure is disposed in the first dielectric stack structure; a second dielectric stack structure located on the side of the first dielectric stack structure away from the substrate; the display panel further comprising a via penetrating at least a portion of the second dielectric stack structure; and the metal buffer structure at least partially overlapping the bottom edge region of the via along the thickness direction of the display panel. By providing a metal buffer structure in the first dielectric stack structure, the metal buffer structure can effectively suppress the risk of crack propagation in the second dielectric stack structure, ensuring the structural stability and display effect of the display panel.

[0007] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a metal buffer structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 15 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 16 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 17 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 18 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0010] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0011] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0012] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, such as... Figure 1 As shown, the display panel includes: a substrate 11; a first dielectric stack structure 12 located on one side of the substrate 11, wherein a metal buffer structure 13 is disposed in the first dielectric stack structure 12; a second dielectric stack structure 14 located on the side of the first dielectric stack structure 12 away from the substrate 11; the display panel also includes a via 15 penetrating at least a portion of the second dielectric stack structure 14; along the thickness direction X of the display panel, the bottom edge region of the metal buffer structure 13 and the via 15 at least partially overlap.

[0013] The substrate 11 can be a flexible substrate such as polyimide, polyvinyl alcohol, or polyethylene terephthalate, or a rigid substrate such as glass or silicon wafer. The specific material of the substrate 11 can be selected according to actual design requirements. A first dielectric stack structure 12 is provided on one side of the substrate 11. The first dielectric stack structure 12 includes multiple inorganic film layers, which may include silicon oxide film layers, silicon nitride film layers, or silicon oxynitride film layers, etc. The inorganic film layers can effectively block external water and oxygen and achieve stress buffering. A second dielectric stack structure 14 is located on the side of the first dielectric stack structure 12 away from the substrate 11. The second dielectric stack structure 14 may include multiple film layers, which may include inorganic film layers or active layers 16, etc. A portion of the film layers in the second dielectric stack structure 14 is etched to form vias 15. However, during the formation of the vias 15, the edge stress is locally released, and the stress concentration area is prone to exceed the fracture strength of the material, thereby generating cracks. A metal buffer structure 13 is provided in the first dielectric stack structure 12, and the metal buffer structure 13 can be disposed between inorganic film layers. Along the thickness direction X of the display panel, the metal buffer structure 13 at least partially overlaps with the bottom edge region of the via 15, and the bottom edge region is the part of the via 15 whose sidewall contacts the bottom of the via 15. When a crack occurs in the bottom edge region of the via 15, due to the ductility and interface effect of the metal buffer structure 13, the presence of the metal buffer structure 13 can prevent the crack from continuing to propagate in the film stack, reduce the risk of propagation, and ensure the display effect of the display panel.

[0014] In this embodiment of the invention, a metal buffer structure is provided in the first dielectric stack structure. Along the thickness direction of the display panel, the metal buffer structure overlaps at least partially with the bottom edge area of ​​the via. The provision of the metal buffer structure can effectively suppress the risk of crack propagation in the second dielectric stack structure, ensuring the structural stability and display effect of the display panel.

[0015] Optional, Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 1 and Figure 2 As shown, there is a gap between the bottom of the via 15 and the metal buffer structure 13.

[0016] In order to prevent short circuits between the metal in the via 15 and the metal buffer structure 13, an inorganic film layer needs to be set between the bottom of the via 15 and the metal buffer structure 13 to prevent short circuits between the metal in the via 15 and the metal buffer structure 13. This creates a gap between the bottom of the via 15 and the metal buffer structure 13, which is filled by the inorganic film layer to provide insulation.

[0017] The metal buffer structure 13 can be configured in different ways. The following example demonstrates a feasible configuration.

[0018] As one possible implementation method, Figure 3 This is a schematic diagram of a metal buffer structure provided in an embodiment of the present invention, as shown below. Figure 3 As shown, within the orthographic projection area of ​​the via 15, the metal buffer structure 13 is arranged as a single layer.

[0019] The bottom edge region of the via 15 is a stress concentration area, which is prone to cracking. In order to prevent the extension of cracks between the dielectric stacked structures, a metal buffer structure 13 can be set in the orthogonal projection area of ​​the via 15 as a whole layer. This allows cracks in different directions generated in the bottom edge region of the via 15 to be blocked by the metal buffer structure 13, preventing crack propagation, protecting the film layer under the metal buffer structure 13, and thus ensuring the structural stability and display effect of the display panel.

[0020] As one possible implementation method, Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 5 A schematic diagram of another metal buffer structure provided in an embodiment of the present invention is shown below. Figure 4 and Figure 5 As shown, the metal buffer structure 13 includes a hollow substructure 131. Along the thickness direction X of the display panel, the hollow substructure 131 does not overlap with the bottom edge area of ​​the via 15.

[0021] The metal buffer structure 13 may also have a perforated substructure 131, but it needs to be positioned along the thickness direction X of the display panel. The perforated substructure 131 should not overlap with the bottom edge area of ​​the via 15, so that the position of the perforated substructure 131 avoids the bottom edge area of ​​the via 15. This allows the non-perforated substructure to effectively block cracks. The perforated substructure 131 can increase the light transmittance of the display panel and reduce the light reflected by the metal buffer structure 13, avoiding interference with the display effect. For flexible display panels, the metal buffer structure 13 can disperse bending stress and reduce the risk of breakage of the inorganic film layer in the display panel.

[0022] Furthermore, the hollow substructure 131 can have different configurations. The following example demonstrates a feasible configuration.

[0023] As one possible implementation method, Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 7 A schematic diagram of another metal buffer structure provided in an embodiment of the present invention is shown below. Figure 6 and Figure 7As shown, the hollow substructure 131 includes multiple hollow portions 1311, and the area of ​​the hollow portion 1311 located in the central region of the metal buffer structure 13 is larger than the area of ​​the hollow portion 1311 located in the edge region of the metal buffer structure 13.

[0024] The perforated substructure 131 includes multiple perforated portions 1311, which are spaced apart. Along the thickness direction X of the display panel, the central region of the metal buffer structure 13 corresponds to the bottom central region of the via 15, and the edge region of the metal buffer structure 13 corresponds to the bottom edge region of the via 15. Since the stress is concentrated in the bottom edge region of the via 15, which is prone to cracking, the area of ​​the perforated portion 1311 located in the central region of the metal buffer structure 13 is larger than the area of ​​the perforated portion 1311 located in the edge region of the metal buffer structure 13. This ensures that there is a large area of ​​metal in the edge region of the metal buffer structure 13, which can block cracks, and that there is a large area of ​​perforated portion 1311 in the central region of the metal buffer structure 13, which can ensure the light transmittance and bending stress release capability of the metal buffer structure 13.

[0025] As one possible implementation method, Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 9 A schematic diagram of another metal buffer structure provided in an embodiment of the present invention is shown below. Figure 8 and Figure 9 As shown, the hollow substructure 131 includes multiple hollow portions 1311, and the distribution density of the hollow portions 1311 located in the central region of the metal buffer structure 13 is greater than the distribution density of the hollow portions 1311 located in the edge region of the metal buffer structure 13.

[0026] The hollow substructure 131 includes multiple hollow sections 1311, which are spaced apart. The dimensions of the multiple hollow sections 1311 can be the same. Since the stress is concentrated at the bottom edge of the through-hole 15, making it prone to cracking, the distribution density of the hollow sections 1311 located in the central region of the metal buffer structure 13 is greater than that located in the edge region. The number of hollow sections 1311 gradually decreases from the central region to the edge region, ensuring a large area of ​​metal at the edge region of the metal buffer structure 13 to block cracks, and a large area of ​​hollow sections 1311 in the central region of the metal buffer structure 13 to ensure the light transmittance and bending stress release capability of the metal buffer structure 13.

[0027] Furthermore, Figure 10 This is a schematic diagram of another metal buffer structure provided in an embodiment of the present invention. Figure 11A schematic diagram of another metal buffer structure provided in an embodiment of the present invention is shown below. Figure 9 , Figure 10 and Figure 11 As shown, the pattern of the hollow substructure 131 is at least one of a grid, a rectangle, or a circle. For example, as... Figure 10 As shown, the pattern of the hollow substructure 131 is a grid; or as... Figure 9 As shown, the pattern of the hollow substructure 131 is rectangular; or, as... Figure 11 As shown, the pattern of the hollow substructure 131 is circular. The pattern of the hollow substructure 131 can be selected according to actual design requirements, and the embodiments of the present invention do not impose specific limitations.

[0028] Optional, continue to refer to Figure 1 In any plane parallel to the vertical light emission direction of the display panel, the minimum width w1 of the via 15 is less than the width w2 of the metal buffer structure 13.

[0029] Since cracks generated at the bottom edge of the via 15 tend to propagate downwards or diagonally downwards, to prevent the area of ​​the metal buffer structure 13 from being too small and causing cracks to extend downwards away from the metal buffer structure 13, the via 15 can be positioned in any plane parallel to the vertical light emission direction of the display panel. The minimum width w1 of the via 15 is less than the width w2 of the metal buffer structure 13. For example, when the minimum width w1 of the via is 2.5 μm, the width w2 of the metal buffer structure 13 is greater than 2.5 μm, so that the bottom projection area of ​​the via 15 can fall within the projection area of ​​the metal buffer structure 13. This allows the cracks generated at the via 15 to be blocked by the metal buffer structure 13, preventing them from continuing to propagate and ensuring the structural stability of the display panel.

[0030] Furthermore, the via 15 and the metal buffer structure 13 can be configured in different ways. The following example demonstrates a feasible configuration.

[0031] As one possible implementation method, Figure 12 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 13 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 12 and Figure 13As shown, the first dielectric stack structure 12 includes at least a first dielectric layer 121, a second dielectric layer 122, and a third dielectric layer 123 stacked sequentially, with the first dielectric layer 121 located on the side of the second dielectric layer 122 closer to the substrate 11; the second dielectric stack structure 14 includes at least a fourth dielectric layer 141 and a fifth dielectric layer 142 stacked sequentially, with the fourth dielectric layer 141 located on the side of the fifth dielectric layer 142 closer to the substrate 11; a via 15 penetrates the fifth dielectric layer 142 and at least a portion of the fourth dielectric layer 141; a metal buffer structure 13 is located between the first dielectric layer 121 and the second dielectric layer 122, or the metal buffer structure 13 is located between the second dielectric layer 122 and the third dielectric layer 123.

[0032] The first dielectric stack structure 12 includes at least a first dielectric layer 121, a second dielectric layer 122, and a third dielectric layer 123 stacked together. The second dielectric stack structure 14 includes at least a fourth dielectric layer 141 and a fifth dielectric layer 142 stacked together. A via 15 located in the second dielectric stack structure 14 can penetrate the fifth dielectric layer 142 and a portion of the fourth dielectric layer 141. Figure 12 As shown, the metal buffer structure 13 can be disposed between the first dielectric layer 121 and the second dielectric layer 122. The bottom of the via 15 is separated from the metal buffer structure 13 by a portion of the fourth dielectric layer 141, the third dielectric layer 123, and the second dielectric layer 122. Cracks generated at the via 15 propagate sequentially to the fourth dielectric layer 141, the third dielectric layer 123, and the second dielectric layer 122, and are effectively blocked by the metal buffer structure 13, preventing further crack propagation and ensuring the structural stability of the display panel. Alternatively, as... Figure 13 As shown, the metal buffer structure 13 can also be disposed between the second dielectric layer 122 and the third dielectric layer 123. The bottom of the via 15 is separated from the metal buffer structure 13 by a portion of the fourth dielectric layer 141 and the third dielectric layer 123. After the crack generated at the via 15 propagates sequentially to the fourth dielectric layer 141 and the third dielectric layer 123, it can be effectively blocked by the metal buffer structure 13, preventing the crack from continuing to propagate and ensuring the structural stability of the display panel.

[0033] As one possible implementation method, Figure 14 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 14As shown, the first dielectric stack structure 12 includes at least a first dielectric layer 121, a second dielectric layer 122, and a third dielectric layer 123 stacked sequentially, with the first dielectric layer 121 located on the side of the second dielectric layer 122 closer to the substrate 11; the second dielectric stack structure 14 includes at least a fourth dielectric layer 141 and a fifth dielectric layer 142 stacked sequentially, with the fourth dielectric layer 141 located on the side of the fifth dielectric layer 142 closer to the substrate 11; a via 15 penetrates the fifth dielectric layer 142, the fourth dielectric layer 141, the third dielectric layer 123, and at least a portion of the second dielectric layer 122; a metal buffer structure 13 is located between the first dielectric layer 121 and the second dielectric layer 122.

[0034] The first dielectric stack structure 12 includes at least a first dielectric layer 121, a second dielectric layer 122, and a third dielectric layer 123 stacked together. The second dielectric stack structure 14 includes at least a fourth dielectric layer 141 and a fifth dielectric layer 142 stacked together. The via 15 can penetrate the fifth dielectric layer 142, the fourth dielectric layer 141, the third dielectric layer 123, and at least a portion of the second dielectric layer 122. Figure 14 As shown, the metal buffer structure 13 can be disposed between the first dielectric layer 121 and the second dielectric layer 122. The bottom of the via 15 is separated from the metal buffer structure 13 by a portion of the fourth dielectric layer 141, the third dielectric layer 123 and the second dielectric layer 122. After the crack generated at the via 15 propagates sequentially to the fourth dielectric layer 141, the third dielectric layer 123 and the second dielectric layer 122, it can be effectively blocked by the metal buffer structure 13 to prevent the crack from continuing to propagate and to ensure the structural stability of the display panel.

[0035] Optional, Figure 15 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 15 As shown, an active layer 16 is also included between the fourth dielectric layer 141 and the fifth dielectric layer 142; via 15 is a source / drain via, and the source / drain via penetrates the active layer 16.

[0036] An active layer 16 is provided between the fourth dielectric layer 141 and the fifth dielectric layer 142. At this time, the via 15 in the display panel can be a source-drain via. The source-drain via can penetrate the fifth dielectric layer 142, the active layer 16 and part of the fourth dielectric layer 141, so that the source-drain metal filled in the subsequent source-drain via can contact the surface of the active layer 16, increase the contact area, improve the current injection uniformity of the transistor and improve stability.

[0037] Furthermore, Figure 16 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 17 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 16 and Figure 17As shown, the sidewall 151 of the via 15 has at least one shape, such as a step or an arc.

[0038] In order to further increase the contact area of ​​surface contact, such as Figure 16 As shown, the sidewall 151 of the via 15 can be shaped as a step, or as... Figure 17 As shown, the sidewall 151 of the via 15 can be arc-shaped. The shape of the sidewall 151 of the via 15 can be selected according to actual design requirements, and the embodiments of the present invention do not impose specific limitations.

[0039] Optionally, the metal buffer structure 13 is made of at least one of molybdenum and titanium. The metal buffer structure 13 can be made of molybdenum, titanium, or a molybdenum-titanium alloy, which enables the metal buffer structure 13 to have excellent corrosion resistance and oxidation resistance, as well as good adhesion, effectively preventing the risk of film peeling.

[0040] Figure 18 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, such as... Figure 18 As shown, the display device 200 includes the display panel 100 described in the above embodiments.

[0041] It should be noted that since the display device provided in this embodiment has the same or corresponding beneficial effects as the display panel in the above embodiments, it will not be described in detail here. The display device 200 provided in this embodiment of the invention can be... Figure 18 The mobile phone shown can also be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, in-vehicle display, medical equipment, industrial control equipment, touch interactive terminal, etc. The embodiments of the present invention do not make any special limitations on this.

[0042] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: Substrate; A first dielectric stack structure located on one side of the substrate, wherein a metal buffer structure is provided in the first dielectric stack structure; A second dielectric stack structure located on the side of the first dielectric stack structure away from the substrate; The display panel further includes a via penetrating at least a portion of the second dielectric stack structure; along the thickness direction of the display panel, the metal buffer structure at least partially overlaps with the bottom edge region of the via.

2. The display panel according to claim 1, characterized in that, There is a gap between the bottom of the via and the metal buffer structure.

3. The display panel according to claim 1, characterized in that, Within the orthographic projection area of ​​the via, the metal buffer structure is arranged as a single layer.

4. The display panel according to claim 1, characterized in that, The metal buffer structure includes a hollow substructure, which does not overlap with the bottom edge region of the via along the thickness direction of the display panel.

5. The display panel according to claim 4, characterized in that, The hollow substructure includes multiple hollow sections, and the area of ​​the hollow section located in the central region of the metal buffer structure is larger than the area of ​​the hollow section located in the edge region of the metal buffer structure.

6. The display panel according to claim 4, characterized in that, The hollow substructure includes multiple hollow sections, and the distribution density of the hollow sections located in the central region of the metal buffer structure is greater than the distribution density of the hollow sections located in the edge region of the metal buffer structure.

7. The display panel according to claim 4, characterized in that, The pattern of the hollowed-out substructure is at least one of grid, rectangle, or circle.

8. The display panel according to claim 1, characterized in that, In any plane parallel to the vertical light emission direction of the display panel, the minimum width of the via is less than the width of the metal buffer structure.

9. The display panel according to claim 1, characterized in that, The first dielectric stack structure includes at least a first dielectric layer, a second dielectric layer and a third dielectric layer stacked sequentially, wherein the first dielectric layer is located on the side of the second dielectric layer closer to the substrate; The second dielectric stack structure includes at least a fourth dielectric layer and a fifth dielectric layer stacked sequentially, wherein the fourth dielectric layer is located on the side of the fifth dielectric layer closer to the substrate; The via penetrates the fifth dielectric layer and at least a portion of the fourth dielectric layer; The metal buffer structure is located between the first dielectric layer and the second dielectric layer, or the metal buffer structure is located between the second dielectric layer and the third dielectric layer.

10. The display panel according to claim 1, characterized in that, The first dielectric stack structure includes at least a first dielectric layer, a second dielectric layer and a third dielectric layer stacked sequentially, wherein the first dielectric layer is located on the side of the second dielectric layer closer to the substrate; The second dielectric stack structure includes at least a fourth dielectric layer and a fifth dielectric layer stacked sequentially, wherein the fourth dielectric layer is located on the side of the fifth dielectric layer closer to the substrate; The via penetrates the fifth dielectric layer, the fourth dielectric layer, the third dielectric layer, and at least a portion of the second dielectric layer; The metal buffer structure is located between the first dielectric layer and the second dielectric layer.

11. The display panel according to claim 9 or 10, characterized in that, An active layer is also included between the fourth dielectric layer and the fifth dielectric layer; The via is a source / drain via, and the source / drain via penetrates the active layer.

12. The display panel according to claim 1, characterized in that, The sidewall shape of the via is at least one of stepped or arc-shaped.

13. The display panel according to claim 1, characterized in that, The metal buffer structure is made of at least one of molybdenum and titanium.

14. A display device, characterized in that, The display panel includes any one of claims 1-13.

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