Display panel, preparation method thereof and display device

Abstract

The invention relates to a display panel, a preparation method thereof and a display device. The display panel includes: a substrate; the pixel limiting layer is located on one side of the substrate, and the pixel limiting layer is provided with a pixel opening and an auxiliary electrode opening located on one side of the pixel opening; the first electrode layer is located on one side of the substrate, and at least part of the first electrode layer is exposed in the pixel opening of the pixel limiting layer; the at least one protruding structure is located on one side of the substrate and located in the auxiliary electrode opening of the pixel limiting layer; the auxiliary electrode layer covers one side, far away from the substrate, of the protruding structure; the second electrode layer is located on the sides, away from the substrate, of the pixel limiting layer, the first electrode layer and the auxiliary electrode layer, and the second electrode layer and the auxiliary electrode layer are connected at the positions of the protruding structures. According to the display panel, due to the fact that the second electrode layer is connected with the auxiliary electrode layer at the position of the protruding structure, the auxiliary electrode layer can serve as a VSS signal line on an array, and therefore the technical effects of reducing VSS voltage IR drop and reducing power consumption can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] As the size of the display panel increases or the brightness is improved, the screen luminous current increases, but the cathode square resistance of the AA area is too large, resulting in a large IR Drop of VSS. In order to ensure the normal operation of the pixel circuit and the consistency of the display brightness, the VDD / VSS voltage difference needs to be set very large, which will inevitably cause a huge waste of luminous power consumption. Summary of the invention

[0003] Based on this, it is necessary to provide a display panel and a method for manufacturing the same, and a display device in order to reduce power consumption.

[0004] A display panel, comprising:

[0005] substrate;

[0006] A pixel defining layer, located on one side of the substrate, wherein the pixel defining layer has a pixel opening and an auxiliary electrode opening located on one side of the pixel opening;

[0007] A first electrode layer, located on one side of the substrate and at least partially exposed in the pixel opening of the pixel defining layer;

[0008] at least one protrusion structure, located on one side of the substrate and in the auxiliary electrode opening of the pixel defining layer;

[0009] an auxiliary electrode layer, covering a side of the protrusion structure away from the substrate; and

[0010] The second electrode layer is located on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the second electrode layer and the auxiliary electrode layer are connected at a position of the protrusion structure.

[0011] In the display panel using the technical solution of the present invention, since the second electrode layer is connected to the auxiliary electrode layer at the protruding structure of the auxiliary layer, the auxiliary electrode layer can be used as a VSS signal line on the array, thereby achieving the technical effect of reducing the VSS voltage IRdrop and lowering power consumption.

[0012] In a feasible implementation, the display panel also includes an auxiliary layer, which is located on one side of the substrate and within the auxiliary electrode opening of the pixel defining layer; the protrusion structure is embedded in the auxiliary layer and at least partially protrudes from the surface of the auxiliary layer.

[0013] In a feasible implementation, the material of the auxiliary layer is an organic material;

[0014] Preferably, the protrusion structure protrudes from the surface of the auxiliary layer by a size of 0.2 μm to 1 μm.

[0015] In a feasible implementation, the material of the protrusion structure is selected from at least one of an inorganic nitride and an inorganic oxide;

[0016] Preferably, the material of the protrusion structure is selected from SiN x With SiO x At least one of .

[0017] In a feasible implementation, the size of the protrusion structure is 0.1 μm to 1 μm.

[0018] In a feasible implementation, the display panel further includes a light-emitting functional layer, the light-emitting functional layer is located on a side of the second electrode layer close to the substrate, and the light-emitting functional layer is disconnected at the position of the protrusion structure;

[0019] Preferably, the first electrode layer is an anode, the second electrode layer is a cathode, and the auxiliary electrode layer is an auxiliary cathode.

[0020] A method for preparing a display panel comprises the following steps:

[0021] providing a substrate;

[0022] forming at least one protrusion structure on one side of the substrate;

[0023] Forming a first electrode layer on one side of the substrate, and forming an auxiliary electrode layer on one side of the protrusion structure, wherein the auxiliary electrode layer covers a side of the protrusion structure away from the substrate;

[0024] forming a pixel defining layer on one side of the substrate, the pixel defining layer having a pixel opening exposing the first electrode layer and an auxiliary electrode opening exposing the auxiliary electrode layer; and

[0025] A second electrode layer is formed on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the second electrode layer is connected to the auxiliary electrode layer at the position of the protrusion structure to obtain a display panel.

[0026] The preparation method of the display panel of the technical solution of the present invention has a simple process. In the prepared display panel, since the second electrode layer and the auxiliary electrode layer are connected at the protruding structure position of the auxiliary layer, the auxiliary electrode layer can be used as a VSS signal routing on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and reducing power consumption.

[0027] In a feasible implementation, the operation of forming at least one protrusion structure on one side of the substrate is: forming an auxiliary layer and at least one protrusion structure on one side of the substrate; wherein the auxiliary layer is located in the auxiliary electrode opening of the pixel defining layer, and at least one protrusion structure is embedded in the auxiliary layer and at least partially protrudes from the surface of the auxiliary layer.

[0028] In a feasible implementation, before forming the second electrode layer, the following steps are also included:

[0029] A light-emitting functional layer is formed on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the light-emitting functional layer is disconnected at a position of the protruding structure.

[0030] A display device comprises any one of the above display panels or a display panel prepared by any one of the above display panel preparation methods.

[0031] The display device of the technical solution of the present invention includes the above-mentioned display panel. Since the second electrode layer and the auxiliary electrode layer are connected at the protruding structure position of the auxiliary layer, the auxiliary electrode layer can be used as a VSS signal routing on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present invention;

[0033] Figure 2 for Figure 1 A partial enlarged view of

[0034] Figure 3 Schematic diagram of the positions of the first electrode layer, the pixel defining layer and the auxiliary electrode layer in the display panel according to the first embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of a display panel according to a second embodiment of the present invention;

[0036] Figure 5 for Figure 4 A partial enlarged view of

[0037] Figure 6 The present invention is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] See also Figure 1 to Figure 3 The display panel 100 according to the first embodiment of the present invention includes: a substrate 110 , a pixel defining layer 120 , a first electrode layer 130 , at least one protrusion structure 141 , an auxiliary electrode layer 150 and a second electrode layer 160 .

[0042] The substrate 110 is used to provide support for other layers, such as a pixel defining layer 120 , a first electrode layer 130 , at least one protrusion structure 141 , an auxiliary electrode layer 150 and a second electrode layer 160 .

[0043] The pixel defining layer 120 is located on one side of the substrate 110 , and the pixel defining layer 120 has a pixel opening 121 and an auxiliary electrode opening 122 located on one side of the pixel opening 121 .

[0044] The first electrode layer 130 is located on one side of the substrate 110 and is located in the pixel opening 121 of the pixel defining layer 120. The first electrode layer 130 is an electrode layer of the display device.

[0045] Among them, at least one protrusion structure 140 is located on one side of the substrate 110 and is at least partially exposed in the auxiliary electrode opening 122 of the pixel defining layer 120. Among them, at least one protrusion structure 141 can push up the film layer evaporated on the auxiliary electrode layer 150, so that the evaporated film layer cannot form a pattern covering the protrusion structure 141, so that the auxiliary electrode layer 150 is exposed at the position of the protrusion structure 141, and then connected to the second electrode layer 160.

[0046] The auxiliary electrode layer 150 is located on a side of the protrusion structure 140 away from the substrate 110. Specifically, the auxiliary electrode layer 150 is located in the auxiliary electrode opening 122 of the pixel defining layer 120. The auxiliary electrode layer 150 can be used as a VSS signal routing on the array.

[0047] The second electrode layer 160 is located on a side of the pixel defining layer 120 , the first electrode layer 130 and the auxiliary electrode layer 150 away from the substrate 110 , and the second electrode layer 160 and the auxiliary electrode layer 150 are connected at the position of the protrusion structure 141 .

[0048] In the display panel 100 of this embodiment, since the second electrode layer 160 is connected to the auxiliary electrode layer 150 at the position of the protruding structure 141, the auxiliary electrode layer 150 can be used as a VSS signal line on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and lowering power consumption.

[0049] Based on the above embodiments, the material of the protrusion structure 140 is selected from at least one of inorganic nitride and inorganic oxide. In other words, the protrusion structure 140 can be inorganic nitride or inorganic oxide, or a mixture of inorganic nitride and inorganic oxide.

[0050] Based on the above-mentioned embodiment, the material of the protrusion structure 140 is selected from SiN x With SiO x At least one of SiN x With SiO x The larger particle size and hardness are conducive to pushing up the film layer evaporated onto the auxiliary electrode layer 150, so that the evaporated film layer cannot form a pattern covering the protruding structure 141, thereby exposing the auxiliary electrode layer 150 at the position of the protruding structure 141, and then connecting with the second electrode layer 160.

[0051] Based on the above embodiment, the size of the protrusion structure 140 is 0.1 μm to 1 μm. Further, the size of the protrusion structure 140 may be, but is not limited to, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.

[0052] On the basis of the above-mentioned embodiment, the display panel 100 further includes a light-emitting functional layer 170, which is located on the side of the second electrode layer 160 close to the substrate 110, and the light-emitting functional layer 170 is disconnected at the position of the protrusion structure 141. The second electrode layer 160 and the auxiliary electrode layer 150 are disconnected at the above-mentioned disconnection position (i.e. Figure 2 Further, at the pixel opening 121, the light-emitting functional layer 170 is located between the first electrode layer 130 and the second electrode layer 160; at the auxiliary electrode opening 122, the light-emitting functional layer 170 is located between the auxiliary electrode layer 150 and the second electrode layer 160.

[0053] On the basis of the above-mentioned embodiment, the first electrode layer 130 is an anode, the second electrode layer 160 is a cathode, and the auxiliary electrode layer 150 is an auxiliary cathode.

[0054] In addition, the display panel 100 of the present embodiment may further include a spacer column (ie, SPC) 180 . The spacer column 180 is located on a side of the pixel defining layer 120 away from the substrate 110 .

[0055] It should also be noted that in the display panel 100 of the present embodiment, the substrate 110 may further include a stacked substrate 111, a first gate insulating layer 112, a second gate insulating layer 113, an interlayer dielectric layer 114, a first flat layer 115, and a second flat layer 116. Among them, the protrusion structure 141 is located between the second flat layer 116 and the auxiliary electrode layer 150. Among them, the substrate 111 may further include a flexible layer, a barrier layer, and a buffer layer. In addition, the display panel 100 of the present invention may also include conventional film layers of an array substrate such as a polysilicon active layer 117, a first gate layer 118, a second gate layer 119, a first source and drain metal layer 1110, and a second source and drain metal layer 1111.

[0056] It should be noted that the structure of the display panel of the present invention is not limited thereto.

[0057] See also Figure 4 and Figure 5 The display panel 200 of the second embodiment of the present invention includes: a substrate 210, a pixel defining layer 220, a first electrode layer 230, an auxiliary layer 240, at least one protrusion structure 241, an auxiliary electrode layer 250 and a second electrode layer 260.

[0058] The substrate 210 is used to provide support for other layers, such as a pixel defining layer 220 , a first electrode layer 230 , an auxiliary layer 240 , at least one protrusion structure 241 , an auxiliary electrode layer 250 and a second electrode layer 260 .

[0059] The pixel defining layer 220 is located on one side of the substrate 210 , and the pixel defining layer 220 has a pixel opening 221 and an auxiliary electrode opening 222 located on one side of the pixel opening 221 .

[0060] The first electrode layer 230 is located on one side of the substrate 210 and is located in the pixel opening 221 of the pixel defining layer 220. The first electrode layer 230 is an electrode layer of the display device.

[0061] The auxiliary layer 240 is located on one side of the substrate 210 and in the auxiliary electrode opening 222 of the pixel defining layer 220 ; the protrusion structure 241 is embedded in the auxiliary layer 240 and at least partially protrudes from the surface of the auxiliary layer 240 .

[0062] Among them, at least one protrusion structure 240 is at least partially exposed in the auxiliary electrode opening 222 of the pixel defining layer 220. Among them, at least one protrusion structure 241 can push up the film layer evaporated on the auxiliary electrode layer 250, so that the evaporated film layer cannot form a pattern covering the protrusion structure 241, so that the auxiliary electrode layer 250 is exposed at the position of the protrusion structure 241, and then connected to the second electrode layer 160.

[0063] The auxiliary electrode layer 250 is located on a side of the protrusion structure 240 away from the substrate 210. Specifically, the auxiliary electrode layer 250 is located in the auxiliary electrode opening 222 of the pixel defining layer 220. The auxiliary electrode layer 250 can be used as a VSS signal routing on the array.

[0064] The second electrode layer 260 is located on a side of the pixel defining layer 220 , the first electrode layer 230 and the auxiliary electrode layer 250 away from the substrate 210 , and the second electrode layer 260 and the auxiliary electrode layer 250 are connected at the position of the protrusion structure 241 .

[0065] In the display panel 200 of this embodiment, since the second electrode layer 260 is connected to the auxiliary electrode layer 250 at the position of the protruding structure 241, the auxiliary electrode layer 250 can be used as a VSS signal line on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and lowering power consumption.

[0066] On the basis of the above-mentioned embodiments, the material of the auxiliary layer 240 is an organic material, which may be, but is not limited to, the material of the planar layer in the array substrate.

[0067] Based on the above embodiment, the protrusion structure 241 protrudes from the surface of the auxiliary layer 240 by a size of 0.2 μm to 1 μm. Further, the protrusion structure 241 protrudes from the surface of the auxiliary layer 240 by a size of 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.

[0068] Based on the above embodiments, the material of the protrusion structure 240 is selected from at least one of inorganic nitride and inorganic oxide. In other words, the protrusion structure 240 can be inorganic nitride or inorganic oxide, or a mixture of inorganic nitride and inorganic oxide.

[0069] Based on the above-mentioned embodiment, the material of the protrusion structure 240 is selected from SiN x With SiO x At least one of SiN x With SiO x The larger particle size and hardness are conducive to pushing up the film layer evaporated onto the auxiliary electrode layer 250, so that the evaporated film layer cannot form a pattern covering the protruding structure 241, thereby exposing the auxiliary electrode layer 250 at the position of the protruding structure 241, and then connecting with the second electrode layer 260.

[0070] Based on the above embodiment, the size of the protrusion structure 240 is 0.1 μm to 1 μm. Further, the size of the protrusion structure 240 may be, but is not limited to, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.

[0071] On the basis of the above-mentioned embodiment, the display panel 200 further includes a light-emitting functional layer 270, which is located on the side of the second electrode layer 260 close to the substrate 210, and the light-emitting functional layer 270 is disconnected at the position of the protrusion structure 241. The second electrode layer 260 and the auxiliary electrode layer 250 are disconnected at the above-mentioned disconnection position (i.e. Figure 4 Further, at the pixel opening 221, the light-emitting functional layer 270 is located between the first electrode layer 230 and the second electrode layer 260; at the auxiliary electrode opening 222, the light-emitting functional layer 270 is located between the auxiliary electrode layer 250 and the second electrode layer 260.

[0072] On the basis of the above-mentioned embodiment, the first electrode layer 230 is an anode, the second electrode layer 260 is a cathode, and the auxiliary electrode layer 250 is an auxiliary cathode.

[0073] In addition, the display panel 200 of the present embodiment may further include a spacer column (ie, SPC) 280 . The spacer column 280 is located on a side of the pixel defining layer 220 away from the substrate 210 .

[0074] It should also be noted that in the display panel 200 of the present embodiment, the substrate 210 may further include a stacked substrate 211, a first gate insulating layer 212, a second gate insulating layer 213, an interlayer dielectric layer 214, a first flat layer 215, and a second flat layer 216. Among them, the auxiliary layer 240 and the protrusion structure 241 are located between the second flat layer 216 and the auxiliary electrode layer 250. Among them, the substrate 211 may further include a flexible layer, a barrier layer, and a buffer layer. In addition, the display panel 200 of the present invention may also include conventional film layers of an array substrate such as a polysilicon active layer 217, a first gate layer 218, a second gate layer 219, a first source and drain metal layer 2110, and a second source and drain metal layer 2111.

[0075] In the display panel using the technical solution of the present invention, since the second electrode layer is connected to the auxiliary electrode layer at the protruding structure of the auxiliary layer, the auxiliary electrode layer can be used as a VSS signal line on the array, thereby achieving the technical effect of reducing the VSS voltage IRdrop and lowering power consumption.

[0076] See also Figure 6 A method for manufacturing a display panel according to an embodiment of the present invention comprises the following steps:

[0077] S10. Provide a substrate.

[0078] Please also refer to Figure 1 , the substrate 110 may include a stacked substrate 111, a first gate insulating layer 112, a second gate insulating layer 113, an interlayer dielectric layer 114, a first flat layer 115, and a second flat layer 116. Among them, the protrusion structure 141 is located between the second flat layer 116 and the auxiliary electrode layer 150. Among them, the substrate 111 may further include a flexible layer, a barrier layer, and a buffer layer. In addition, the display panel 100 of the present invention may also include conventional film layers of an array substrate such as a polysilicon active layer 117, a first gate layer 118, a second gate layer 119, a first source and drain metal layer 1110, and a second source and drain metal layer 1111.

[0079] S20, forming at least one protrusion structure on one side of the substrate.

[0080] In a feasible implementation, such as the display panel 100 of the first embodiment described above, at least one protrusion structure 141 is directly formed on one side of the substrate 110 .

[0081] In a feasible implementation, as in the display panel 200 of the second embodiment described above, the operation of forming at least one protrusion structure on one side of the substrate is: forming an auxiliary layer 240 and at least one protrusion structure 241 on one side of the substrate 210; wherein the auxiliary layer 240 is located in the auxiliary electrode opening 222 of the pixel defining layer 220, and at least one protrusion structure 241 is embedded in the auxiliary layer 240 and at least partially protrudes from the surface of the auxiliary layer 240. Specifically, a plurality of granular protrusion structures 241 are doped in the auxiliary layer material, and then the auxiliary layer material doped with the protrusion structure 241 is coated on the substrate 210, and the thickness of the auxiliary layer material is about 2.2 μm, and then the auxiliary layer material is cured and patterned to obtain the auxiliary layer 240 and the plurality of protrusion structures 241 doped in the auxiliary layer 240. At this time, the thickness of the auxiliary layer 240 is about 1.65 μm, and at least one protrusion structure 241 protrudes from the surface of the auxiliary layer 240.

[0082] S30, forming a first electrode layer on one side of the substrate, and forming an auxiliary electrode layer on one side of the protrusion structure, wherein the auxiliary electrode layer covers a side of the protrusion structure away from the substrate.

[0083] In step S30, taking the display panel 100 of the first embodiment as an example, a first electrode layer 130 can be formed on one side of the substrate 110, and an auxiliary electrode layer 150 can be formed on one side of the protrusion structure 141. Furthermore, both the first electrode layer 130 and the auxiliary electrode layer 150 can be made of anode layer materials.

[0084] In this step, due to the existence of the protrusion structure 141 , after the auxiliary electrode layer 150 is formed, a corresponding protrusion structure is also formed on the auxiliary electrode layer 150 at a vertical position of at least one protrusion structure 141 .

[0085] S40, forming a pixel defining layer on one side of the substrate, wherein the pixel defining layer has a pixel opening exposing the first electrode layer and an auxiliary electrode opening exposing the auxiliary electrode layer.

[0086] In step S40, taking the display panel 100 of the first embodiment as an example, a pixel defining layer 120 can be formed on one side of the substrate 110 by using common means in the art, and the pixel defining layer 120 has a pixel opening 121 exposing the first electrode layer 130 and an auxiliary electrode opening 122 exposing the auxiliary electrode 150 layer.

[0087] S50, forming a second electrode layer on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and connecting the second electrode layer and the auxiliary electrode layer at a position of the protruding structure to obtain a display panel.

[0088] In step S50 , taking the display panel 100 of the first embodiment as an example, a second electrode layer 160 may be formed on a side of the pixel defining layer 120 , the first electrode layer 130 and the auxiliary electrode layer 150 away from the substrate 110 by using common means in the art.

[0089] It should be noted that the first electrode layer 130 is not directly connected to the second electrode layer 160. Before forming the second electrode layer 160, the following steps may be further included: a light-emitting functional layer 170 is formed on the side of the pixel defining layer 120, the first electrode layer 130 and the auxiliary electrode layer 150 away from the substrate 110, and the light-emitting functional layer 170 is disconnected at the position of the protrusion structure 141. According to the above, since the auxiliary electrode layer 150 also forms corresponding protrusion structures at the vertical position of the protrusion structures 141, the light-emitting functional layer 170 is disconnected at the position of the protrusion structure 141, and the second electrode layer 160 and the auxiliary electrode layer 150 are disconnected at the above-mentioned disconnection position (i.e. Figure 2 The two circular dotted boxes are connected.

[0090] The preparation method of the display panel of the technical solution of the present invention has a simple process. In the prepared display panel, since the second electrode layer and the auxiliary electrode layer are connected at the protruding structure position of the auxiliary layer, the auxiliary electrode layer can be used as a VSS signal routing on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and reducing power consumption.

[0091] A display device according to one embodiment includes any one of the above-mentioned display panels.

[0092] The display device of the technical solution of the present invention includes the above-mentioned display panel. Since the second electrode layer and the auxiliary electrode layer are connected at the position of the protrusion structure, the auxiliary electrode layer can be used as a VSS signal routing on the array, thereby achieving the technical effect of reducing the VSS voltage IR drop and reducing power consumption.

[0093] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; A pixel defining layer, located on one side of the substrate, wherein the pixel defining layer has a pixel opening and an auxiliary electrode opening located on one side of the pixel opening; A first electrode layer, located on one side of the substrate and at least partially exposed in the pixel opening of the pixel defining layer; at least one protrusion structure, located on one side of the substrate and in the auxiliary electrode opening of the pixel defining layer; an auxiliary electrode layer, covering a side of the protrusion structure away from the substrate; and The second electrode layer is located on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the second electrode layer and the auxiliary electrode layer are connected at a position of the protrusion structure.

2. The display panel according to claim 1, characterized in that: The display panel further includes an auxiliary layer, which is located on one side of the substrate and in the auxiliary electrode opening of the pixel defining layer; the protrusion structure is embedded in the auxiliary layer and at least partially protrudes from the surface of the auxiliary layer.

3. The display panel according to claim 2, characterized in that: The material of the auxiliary layer is an organic material; Preferably, the protrusion structure protrudes from the surface of the auxiliary layer by a size of 0.2 μm to 1 μm.

4. The display panel according to any one of claims 1 to 3, characterized in that: The material of the protrusion structure is selected from at least one of an inorganic nitride and an inorganic oxide; Preferably, the material of the protrusion structure is selected from SiN x With SiO x At least one of .

5. The display panel according to any one of claims 1 to 3, characterized in that: The size of the protrusion structure is 0.1 μm to 1 μm.

6. The display panel according to any one of claims 1 to 3, characterized in that: The display panel further includes a light-emitting functional layer, the light-emitting functional layer is located on a side of the second electrode layer close to the substrate, and the light-emitting functional layer is disconnected at the position of the protrusion structure; Preferably, the first electrode layer is an anode, the second electrode layer is a cathode, and the auxiliary electrode layer is an auxiliary cathode.

7. A method for preparing a display panel, characterized in that: The steps include: providing a substrate; forming at least one protrusion structure on one side of the substrate; Forming a first electrode layer on one side of the substrate, and forming an auxiliary electrode layer on one side of the protrusion structure, wherein the auxiliary electrode layer covers a side of the protrusion structure away from the substrate; forming a pixel defining layer on one side of the substrate, the pixel defining layer having a pixel opening exposing the first electrode layer and an auxiliary electrode opening exposing the auxiliary electrode layer; as well as A second electrode layer is formed on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the second electrode layer is connected to the auxiliary electrode layer at the position of the protrusion structure to obtain a display panel.

8. The method for preparing a display panel according to claim 7, characterized in that: The operation of forming at least one protrusion structure on one side of the substrate is: forming an auxiliary layer and at least one protrusion structure on one side of the substrate; wherein the auxiliary layer is located in the auxiliary electrode opening of the pixel defining layer, and at least one protrusion structure is embedded in the auxiliary layer and at least partially protrudes from the surface of the auxiliary layer.

9. The method for preparing a display panel according to claim 7, characterized in that: Before forming the second electrode layer, the method further includes the following steps: A light-emitting functional layer is formed on a side of the pixel defining layer, the first electrode layer and the auxiliary electrode layer away from the substrate, and the light-emitting functional layer is disconnected at a position of the protruding structure.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 6 or a display panel prepared by the method for preparing a display panel according to any one of claims 7 to 9.

Images