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 plurality of isolation structures are arranged on one side of the substrate at intervals; the isolation structure comprises a first side wall and a second side wall, the first side wall defines an isolation opening, and the second side wall is arranged on the side, away from the isolation opening, of the isolation structure; the average roughness of the first side wall is smaller than that of the second side wall. The performance of the display panel can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising next-generation flat panel display technology. Compared to LCD technology, OLED technology has advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angle, and fast response speed. However, the performance of current OLED display panels needs improvement. Summary of the Invention

[0003] Therefore, it is necessary to provide a display panel with improved performance, a method for manufacturing the same, and a display device.

[0004] In a first aspect, embodiments of this application provide a display panel, including:

[0005] substrate;

[0006] Multiple isolation structures are arranged at intervals on one side of the substrate; each isolation structure includes a first sidewall and a second sidewall, the first sidewall forming an isolation opening, and the second sidewall being located on the side of the isolation structure away from the isolation opening; the average roughness of the first sidewall is less than the average roughness of the second sidewall.

[0007] The display panel provided in this application embodiment achieves this by making the average roughness of the first sidewall of the isolation structure smaller than the average roughness of the second sidewall. This has two advantages: firstly, it facilitates a tighter bond between the encapsulation portion in the display panel and the second sidewall of the isolation structure, improving encapsulation performance; secondly, it facilitates the overlap between the electrodes of the light-emitting element and the first sidewall, improving the electrical connection performance between the electrodes of the light-emitting element and the isolation structure, mitigating display defects caused by poor contact between the light-emitting element and the isolation structure, and ultimately enhancing the display effect.

[0008] In one embodiment, the display panel further includes:

[0009] Multiple light-emitting elements are disposed on one side of the substrate, and at least a portion of the light-emitting elements are disposed within the isolation opening;

[0010] Multiple encapsulation portions are provided corresponding to the multiple isolation openings; the encapsulation portions cover the side of the light-emitting element and the isolation structure away from the substrate, and extend to the second sidewall and cover at least a portion of the second sidewall;

[0011] Optionally, the encapsulation portion further covers the first sidewall;

[0012] Optionally, the orthographic projection of the encapsulation portion on the substrate overlaps the orthographic projection of the isolation structure on the substrate.

[0013] In one embodiment, the light-emitting element includes a first electrode, a light-emitting functional part, and a second electrode stacked along a direction away from the substrate; the second electrode overlaps with the first sidewall and is electrically connected to the isolation structure.

[0014] In one embodiment, the isolation structure includes a conductive portion and a blocking portion stacked along a direction away from the substrate, wherein the outer contour of the orthographic projection of the blocking portion on the substrate is located outside the outer contour of the orthographic projection of the conductive portion on the substrate.

[0015] Optionally, the first sidewall includes a first sub-wall disposed on the side of the conductive portion near the isolation opening; the second sidewall includes a fourth sub-wall disposed on the side of the conductive portion away from the isolation opening; the average roughness of the first sub-wall is less than the average roughness of the fourth sub-wall.

[0016] The encapsulation portion also covers at least a portion of the fourth sub-wall;

[0017] Optionally, the second electrode covers a portion of the first sub-wall;

[0018] Optionally, the encapsulation portion also covers a portion of the first sub-wall.

[0019] In one embodiment, the slope of the first sub-wall surface is continuous, while the slope of the fourth sub-wall surface is discontinuous.

[0020] Optionally, the surface of the fourth sub-wall has an uneven structure;

[0021] Optionally, the surface of the fourth sub-wall is provided with burrs and / or tooth-like protrusions;

[0022] Optionally, the surface of the first sub-wall is a smooth surface.

[0023] In one embodiment, the first sidewall further includes a second sub-wall and a third sub-wall, the second sub-wall being disposed on the side of the blocking portion near the isolation opening, and the third sub-wall being disposed on the side of the blocking portion near the substrate, and connecting the first sub-wall and the second sub-wall; the encapsulation portion further covers the second sub-wall and the third sub-wall;

[0024] Optionally, the second sidewall further includes a fifth sub-wall and a sixth sub-wall, the fifth sub-wall being disposed on the side of the blocking portion away from the isolation opening, and the sixth sub-wall being disposed on the side of the blocking portion close to the substrate, and connecting the fourth sub-wall and the fifth sub-wall; the encapsulation portion also covers the fifth sub-wall and the sixth sub-wall.

[0025] In one embodiment, the isolation structure is further provided with a stacked light-emitting material layer and a first electrode material layer on the side away from the substrate;

[0026] The encapsulation portion also covers the side of the first electrode material layer away from the substrate;

[0027] Optionally, the light-emitting material layer on the isolation structure is disposed in the same layer as the light-emitting functional part of the light-emitting element corresponding to the isolation structure; the first electrode material layer on the isolation structure is disposed in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure.

[0028] Optionally, the second sidewall of the isolation structure is further provided with a second electrode material layer, and the encapsulation portion further covers the second electrode material layer;

[0029] Optionally, the second electrode material layer on the isolation structure is disposed in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure.

[0030] In one embodiment, the encapsulation portion includes a main body portion and an extension portion connected to the main body portion; the main body portion covers the side surface of the light-emitting element away from the substrate, and the extension portion covers a portion of the first sub-wall, the third sub-wall, the second sub-wall, the first electrode material layer, the fifth sub-wall, the sixth sub-wall, a portion of the fourth sub-wall, and the second electrode material layer;

[0031] Optionally, the encapsulation portion further includes a raised portion, one end of which is connected to the end of the extension portion away from the main body portion, and the other end of the raised portion extends in a direction away from the second sidewall;

[0032] Optionally, the display panel further includes an insulating structure disposed between the isolation structure and the substrate; at least a portion of the surface of the raised portion near the substrate is spaced apart from the surface of the insulating structure away from the substrate.

[0033] In one embodiment, the display panel further includes:

[0034] A first auxiliary electrode is disposed between the isolation structure and the substrate; the first auxiliary electrode is electrically connected to the isolation structure.

[0035] A second auxiliary electrode is disposed between the light-emitting element and the substrate; the second auxiliary electrode is electrically connected to the first electrode.

[0036] Optionally, the first auxiliary electrode and the second auxiliary electrode are disposed in the same layer.

[0037] In one embodiment, the display panel further includes:

[0038] A first encapsulation layer is disposed on the side of the isolation structure away from the substrate and on the side of the light-emitting element away from the substrate;

[0039] The second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate;

[0040] Optionally, the first encapsulation layer comprises an organic material, and the second encapsulation layer comprises an inorganic material;

[0041] Optionally, a portion of the first encapsulation layer may also be disposed between two adjacent isolation structures.

[0042] In one embodiment, the isolation structure includes a first sidewall and an isolation opening formed by the first sidewall; the light-emitting elements are arranged in a one-to-one correspondence with the isolation opening;

[0043] The orthographic projection of the second sidewall on the substrate surrounds the orthographic projection of the first sidewall on the substrate.

[0044] Secondly, embodiments of this application provide a display panel, including:

[0045] substrate;

[0046] Multiple isolation structures are arranged at intervals on one side of the substrate; each isolation structure includes a conductive portion and a blocking portion stacked along a direction away from the substrate, wherein the outer contour of the orthographic projection of the blocking portion on the substrate is located outside the outer contour of the orthographic projection of the conductive portion on the substrate; the isolation structure further includes a first sidewall and a second sidewall, the first sidewall forming an isolation opening, and the second sidewall being disposed on the side of the isolation structure away from the isolation opening; the first sidewall includes a first sub-wall disposed on the side of the conductive portion near the isolation opening; the second sidewall includes a fourth sub-wall disposed on the side of the conductive portion away from the isolation opening; the slope of the surface of the first sub-wall is continuous, and the slope of the surface of the fourth sub-wall is discontinuous.

[0047] The display panel provided in this application embodiment, by making the slope of the first sub-wall surface continuous and the slope of the fourth sub-wall surface discontinuous, is equivalent to making the surface of the first sub-wall relatively rough and the surface of the fourth sub-wall relatively smooth. This has two advantages: firstly, it facilitates a tighter bond between the encapsulation portion in the display panel and the fourth sub-wall of the isolation structure, improving encapsulation performance; secondly, it facilitates the connection between the electrodes of the light-emitting element in the display panel and the first sub-wall, improving the electrical connection performance between the electrodes of the light-emitting element and the isolation structure, mitigating display defects caused by poor contact between the light-emitting element and the isolation structure, and ultimately enhancing the display effect.

[0048] In one embodiment, the surface of the fourth sub-wall has an uneven structure, or the surface of the fourth sub-wall is provided with burrs and / or tooth-like protrusions, or the surface of the first sub-wall is a smooth surface.

[0049] In one embodiment, the display panel further includes:

[0050] Multiple light-emitting elements are disposed on one side of the substrate, and at least a portion of the light-emitting elements are disposed within the isolation opening;

[0051] Multiple encapsulation portions are provided corresponding to the multiple isolation openings; the encapsulation portions cover the side of the light-emitting element and the isolation structure away from the substrate, and extend to the second sidewall and cover at least a portion of the second sidewall;

[0052] Optionally, the encapsulation portion covers at least a portion of the fourth sub-wall;

[0053] Optionally, the light-emitting element includes a first electrode, a light-emitting functional part, and a second electrode stacked along a direction away from the substrate; the second electrode overlaps with the first sub-wall and is electrically connected to the isolation structure;

[0054] Optionally, the encapsulation portion also covers a portion of the first sub-wall.

[0055] In one embodiment, the first sidewall further includes a second sub-wall and a third sub-wall, the second sub-wall being disposed on the side of the blocking portion near the isolation opening, and the third sub-wall being disposed on the side of the blocking portion near the substrate, and connecting the first sub-wall and the second sub-wall; the encapsulation portion further covers the second sub-wall and the third sub-wall;

[0056] Optionally, the second sidewall further includes a fifth sub-wall and a sixth sub-wall, the fifth sub-wall being disposed on the side of the blocking portion away from the isolation opening, and the sixth sub-wall being disposed on the side of the blocking portion close to the substrate, and connecting the fourth sub-wall and the fifth sub-wall; the encapsulation portion further covers the fifth sub-wall and the sixth sub-wall;

[0057] Optionally, the orthographic projection of the encapsulation portion on the substrate covers the orthographic projection of the isolation structure on the substrate;

[0058] Optionally, the isolation structure further includes a light-emitting material layer and a first electrode material layer stacked on the side away from the substrate;

[0059] The encapsulation portion also covers the side of the first electrode material layer away from the substrate;

[0060] Optionally, the light-emitting material layer on the isolation structure is disposed in the same layer as the light-emitting functional part of the light-emitting element corresponding to the isolation structure; the first electrode material layer on the isolation structure is disposed in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure.

[0061] Optionally, the second sidewall of the isolation structure is further provided with a second electrode material layer, and the encapsulation portion further covers the second electrode material layer;

[0062] Optionally, the second electrode material layer on the isolation structure is disposed in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure;

[0063] Optionally, the encapsulation portion includes a main body portion and an extension portion connected to the main body portion; the main body portion covers the side surface of the light-emitting element away from the substrate, and the extension portion covers a portion of the first sub-wall, the third sub-wall, the second sub-wall, the first electrode material layer, the fifth sub-wall, the sixth sub-wall, a portion of the fourth sub-wall, and the second electrode material layer;

[0064] Optionally, the encapsulation portion further includes a raised portion, one end of which is connected to the end of the extension portion away from the main body portion, and the other end of the raised portion extends in a direction away from the second sidewall;

[0065] Optionally, the display panel further includes an insulating structure disposed between the isolation structure and the substrate; at least a portion of the surface of the raised portion near the substrate is spaced apart from the surface of the insulating structure away from the substrate.

[0066] In one embodiment, the display panel further includes:

[0067] A first auxiliary electrode is disposed between the isolation structure and the substrate; the first auxiliary electrode is electrically connected to the isolation structure.

[0068] A second auxiliary electrode is disposed between the light-emitting element and the substrate; the second auxiliary electrode is electrically connected to the first electrode.

[0069] Optionally, the first auxiliary electrode and the second auxiliary electrode are disposed in the same layer;

[0070] Optionally, the display panel further includes:

[0071] A first encapsulation layer is disposed on the side of the isolation structure away from the substrate and on the side of the light-emitting element away from the substrate;

[0072] The second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate;

[0073] Optionally, the first encapsulation layer comprises an organic material, and the second encapsulation layer comprises an inorganic material;

[0074] Optionally, a portion of the first encapsulation layer is further disposed between two adjacent isolation structures;

[0075] Optionally, the isolation structure includes a first sidewall and an isolation opening formed by the first sidewall; the light-emitting element is disposed in a one-to-one correspondence with the isolation opening;

[0076] The orthographic projection of the second sidewall on the substrate surrounds the orthographic projection of the first sidewall on the substrate.

[0077] Thirdly, embodiments of this application provide a method for manufacturing a display panel, comprising:

[0078] Provide substrate;

[0079] A plurality of isolation structures are formed on one side of the substrate; the isolation structure includes a first sidewall and a second sidewall, the first sidewall enclosing an isolation opening, and the second sidewall being disposed on the side of the isolation structure away from the isolation opening; the average roughness of the first sidewall is less than the average roughness of the second sidewall.

[0080] The display panel manufacturing method provided in this application makes the average roughness of the first sidewall of the isolation structure smaller than the average roughness of the second sidewall. This improves both the tightness of the encapsulation portion in the display panel and the second sidewall of the isolation structure, enhancing encapsulation performance, and the electrical connection between the electrodes of the light-emitting element and the first sidewall, thus mitigating display defects caused by poor contact between the light-emitting element and the isolation structure, and ultimately improving the display effect.

[0081] In one embodiment, the formation of a plurality of isolation structures on one side of the substrate includes:

[0082] A plurality of initial isolation structures are formed on one side of the substrate; the initial isolation structure includes a first initial sidewall and a second sidewall, the first initial sidewall enclosing an isolation opening, and the second sidewall being disposed on the side of the initial isolation structure away from the isolation opening;

[0083] The first initial sidewall of the initial isolation structure is surface treated to form the isolation structure having the first sidewall;

[0084] A plurality of light-emitting elements and a plurality of encapsulation portions are formed on one side of the substrate; the plurality of light-emitting elements are correspondingly disposed with respect to the isolation openings of the plurality of isolation structures; at least a portion of the light-emitting elements is disposed within the corresponding isolation openings; the plurality of encapsulation portions are correspondingly disposed with respect to the plurality of light-emitting elements, the encapsulation portions covering the side of the corresponding light-emitting element away from the substrate, and extending to and covering at least a portion of the second sidewall; the light-emitting element includes a first electrode, a light-emitting functional portion, and a second electrode stacked along the direction away from the substrate; a portion of the second electrode of the light-emitting element covers at least a portion of the first sidewall that surrounds and forms the corresponding isolation opening, and is electrically connected to the isolation structure.

[0085] In one embodiment, the formation of a plurality of isolation structures on one side of the substrate includes:

[0086] A plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light-emitting elements, a plurality of second light-emitting elements, and a plurality of third light-emitting elements are formed on one side of the substrate; the plurality of first light-emitting elements are correspondingly disposed with the isolation openings of the plurality of first isolation structures; the plurality of second light-emitting elements are correspondingly disposed with the isolation openings of the plurality of second isolation structures; and the plurality of third light-emitting elements are correspondingly disposed with the isolation openings of the plurality of third isolation structures.

[0087] Optionally, forming a plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light-emitting elements, a plurality of second light-emitting elements, and a plurality of third light-emitting elements on one side of the substrate includes:

[0088] An isolation structure material is formed on one side of the substrate;

[0089] The isolation structure material is subjected to a first patterning process to form a plurality of first initial isolation structures; the first initial isolation structure includes a first initial sidewall and a second sidewall;

[0090] The first initial sidewall of the first initial isolation structure is surface treated to form a first isolation structure having the first sidewall;

[0091] A plurality of the first light-emitting elements are formed on one side of the substrate;

[0092] The isolation structure material is subjected to a second patterning process to form a plurality of second initial isolation structures; the second initial isolation structure includes a first initial sidewall and a second sidewall;

[0093] The first initial sidewall of the second initial isolation structure is surface treated to form a second isolation structure having the first sidewall;

[0094] A plurality of second light-emitting elements are formed on one side of the substrate;

[0095] The isolation structure material is subjected to a third patterning process to form a plurality of third initial isolation structures; the third initial isolation structure includes a first initial sidewall and a second sidewall;

[0096] The first initial sidewall of the third initial isolation structure is surface treated to form a third isolation structure having the first sidewall;

[0097] A plurality of the third light-emitting elements are formed on one side of the substrate.

[0098] Fourthly, embodiments of this application provide a display device, which includes the aforementioned display panel. Attached Figure Description

[0099] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0100] Figure 1 This is a partial cross-sectional structural diagram of a display panel provided in an embodiment of this application.

[0101] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the isolation structure and the light-emitting element.

[0102] Figure 3 for Figure 1 A top view of the isolated structure.

[0103] Figure 4 for Figure 3 The diagram shows a top view of the isolation structure, light-emitting element, and package.

[0104] Figure 5A partial cross-sectional structural diagram of another display panel provided for an embodiment of this application.

[0105] Figure 6 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application.

[0106] Figure 7 for Figure 6 A schematic diagram of a process for preparing S200 is shown.

[0107] Figure 8 for Figure 6 Another schematic diagram of the process for preparing S200 is shown.

[0108] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0109] Explanation of reference numerals in the attached figures:

[0110] 1. Display device; 10. Display panel; 11. Array substrate; 111. Substrate; 112. First semiconductor layer; 113. First insulating layer; 114. First metal layer; 115. Second insulating layer; 116. Second metal layer; 117. Third insulating layer; 118. Second semiconductor layer; 119. Fourth insulating layer; 1110. Metal oxide layer; 1111. Fifth insulating layer; 1112. Third metal layer; 1113. First planarization layer; 1114. Fourth metal layer; 1115. Second planarization layer; 1116. Fifth metal layer; 1117. Third planarization layer; 12. Isolation structure; 12a. Isolation opening; 12b. First sidewall; 12b1. First sub- 12b2, second sub-wall; 12b3, third sub-wall; 12c, second sidewall; 12c1, fourth sub-wall; 12c11, toothed protrusion; 12c2, fifth sub-wall; 12c3, sixth sub-wall; 121, conductive part; 122, blocking part; 13, light-emitting element; 131, first electrode; 132, light-emitting functional part; 133, second electrode; 14, encapsulation part; 141, main body part; 142, extension part; 143, raised part; 151, light-emitting material layer; 152, first electrode material layer; 153, second electrode material layer; 16, insulating structure; 17, first encapsulation layer; 18, second encapsulation layer; 191, first auxiliary electrode; 192, second auxiliary electrode. Detailed Implementation

[0111] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0112] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, this does not indicate any order, quantity, or importance, but is merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Words such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, without excluding other elements or objects.

[0113] The composition and preparation of the isolation structure mentioned below are further described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 100935, PCT / CN2024 / 102785, PCT / CN2024 / 099419, PCT / CN2024 / 099072, and CN116685174A for reference.

[0114] Firstly, referring to Figures 1-5 As shown, this application embodiment provides a display panel 10, which may be an organic light-emitting diode display panel 10 (OLED) or a quantum dot light-emitting diode display panel 10 (QLED).

[0115] Specifically, the display panel 10 includes a substrate 111 and a plurality of isolation structures 12. The plurality of isolation structures 12 are arranged at intervals on one side of the substrate 111. The isolation structure 12 includes a first sidewall 12b and a second sidewall 12c. The first sidewall 12b surrounds and forms an isolation opening 12a, and the second sidewall 12c is disposed on the side of the isolation structure 12 away from the isolation opening 12a. The average roughness of the first sidewall 12b is less than the average roughness of the second sidewall 12c.

[0116] For example, the first sidewall 12b can be considered as the cavity wall of the isolation opening 12a. The second sidewall 12c can be considered as the outer sidewall of the isolation structure 12.

[0117] In this embodiment, the "average roughness" of the first sidewall 12b refers to the average surface roughness of the wall surface of the first sidewall 12b. The "average roughness" of the second sidewall 12c refers to the average surface roughness of the wall surface of the second sidewall 12c. Surface roughness refers to the unevenness of a surface, characterized by small spacing and minute peaks and valleys. It is understood that the roughness of the walls of the first sidewall 12b and the second sidewall 12c can be non-uniform. It should be noted that the smaller the roughness of the wall surface, the better the smoothness of the wall surface, and the smoother it is, the better the continuity of the vapor-deposited film layer on the wall surface.

[0118] The display panel 10 provided in this application embodiment has a lower average roughness than the second sidewall 12c of the isolation structure 12. This improves both the encapsulation performance and the packaging performance. Firstly, it facilitates a tighter connection between the encapsulation portion 14 (described in detail below) and the second sidewall 12c of the isolation structure 12. Secondly, it improves the connection between the electrode of the light-emitting element 13 (the second electrode 133 below) and the first sidewall 12b, enhancing the electrical connection between the electrode of the light-emitting element 13 and the isolation structure 12. This mitigates display defects caused by poor contact between the light-emitting element 13 and the isolation structure 12, thus improving the display effect.

[0119] In one embodiment, the display panel 10 further includes a plurality of light-emitting elements 13 disposed on one side of the substrate 111 and corresponding to the isolation openings 12a of the plurality of isolation structures 12; at least a portion of the light-emitting elements 13 is disposed within the corresponding isolation openings 12a; each light-emitting element 13 includes a first electrode 131, a light-emitting functional portion 132, and a second electrode 133 stacked along a direction away from the substrate 111; the second electrode 133 overlaps with the first sidewall 12b and is electrically connected to the isolation structure 12. Exemplarily, the edge portion of the second electrode 133 covers at least a portion of the cavity wall of the isolation opening 12a.

[0120] In this embodiment, the overall smoothness of the first sidewall 12b is better than that of the second sidewall 12c. When manufacturing the second electrode 133, it is beneficial to make the second electrode 133 on the first sidewall 12b continuous and uniform, thereby increasing the contact area between the second electrode 133 and the first sidewall 12b. This improves the electrical connection performance between the second electrode 133 and the isolation structure 12, improves the display defects caused by poor contact between the second electrode 133 and the isolation structure 12, and enhances the display effect.

[0121] It should be noted that one or more isolation openings 12a may be formed on an isolation structure 12. The correspondence between the light-emitting element 13 and the isolation opening 12a can be "many to one" or "one to one". This embodiment of the application is illustrated by taking a one-to-one correspondence between the light-emitting element 13 and the isolation opening 12a as an example.

[0122] It should be noted that the first electrode 131 can be an anode, the second electrode 133 can be a cathode, and the light-emitting functional unit 132 includes at least an emission layer (EML). In addition, it may include one or more of the following: a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole block layer (HBL), and an electron block layer (EBL). Alternatively, the light-emitting functional unit 132 may be a stacked light-emitting structure, that is, it includes at least two emission layers and a charge generation layer (CGL) located between adjacent emission layers.

[0123] In one embodiment, reference Figure 1 and Figure 4 As shown, the display panel 10 also includes a plurality of encapsulation portions 14 corresponding to a plurality of light-emitting elements 13; the encapsulation portions 14 cover the side of the corresponding light-emitting element 13 away from the substrate 111, and extend to the second sidewall 12c and cover at least a portion of the second sidewall 12c. Further, the encapsulation portions 14 also cover the side of the isolation structure 12 away from the substrate 111.

[0124] Because the average roughness of the second sidewall 12c is relatively large, covering at least a portion of the second sidewall 12c with the encapsulation portion 14 helps to increase the contact area between the encapsulation portion 14 and the second sidewall 12c, and also facilitates a tighter bond between the encapsulation portion 14 and the second sidewall 12c, thereby improving the encapsulation performance of the encapsulation portion 14. It is important to emphasize that the manufacturing processes of the encapsulation portion 14 and the second electrode 133 are different; for example, the second electrode 133 is manufactured by vapor deposition, while the encapsulation portion 14 is manufactured by chemical vapor deposition. Therefore, the smaller the average roughness of the first sidewall 12b, the more uniform and continuous the second electrode 133. Conversely, a larger average roughness of the second sidewall 12c results in a better bond between the encapsulation portion 14 and the second sidewall 12c.

[0125] It should be noted that the correspondence between the package 14 and the light-emitting element 13 can be "many to one" or "one to one". This application embodiment uses a one-to-one correspondence between the package 14 and the light-emitting element 13 as an example for explanation.

[0126] In one embodiment, the encapsulation part 14 is made of an inorganic material.

[0127] In one embodiment, the encapsulation portion 14 also covers the first sidewall 12b. Specifically, the second electrode 133 does not completely cover the first sidewall 12b, and the remaining portion of the first sidewall 12b is covered by the encapsulation portion 14. This increases the coverage area of ​​the encapsulation portion 14 and reduces the risk of encapsulation failure.

[0128] In one embodiment, the orthographic projection of the package portion 14 onto the substrate 111 overlaps the orthographic projection of the isolation structure 12 onto the substrate 111. This allows the package portion 14 to effectively encapsulate the isolation structure 12, thereby improving the packaging performance of the package portion 14 and reducing the risk of packaging failure.

[0129] In one embodiment, reference Figure 3 As shown, the isolation structure 12 includes a first sidewall 12b and an isolation opening 12a formed by the first sidewall 12b. That is, an isolation structure 12 has an isolation opening 12a.

[0130] Furthermore, the light-emitting element 13 is arranged in a one-to-one correspondence with the isolation opening 12a, that is, the light-emitting element 13 is arranged in a one-to-one correspondence with the isolation structure 12. The orthographic projection of the second sidewall 12c on the substrate 111 surrounds the periphery of the orthographic projection of the first sidewall 12b on the substrate 111.

[0131] Furthermore, an encapsulation portion 14 is provided on an isolation structure 12, and the encapsulation portion 14 covers the first sidewall 12b, the second sidewall 12c, and the side of the isolation structure 12 away from the substrate 111. In this way, the encapsulation performance of the encapsulation portion 14 can be improved and the risk of encapsulation failure of the encapsulation portion 14 can be reduced.

[0132] In one embodiment, the isolation structure 12 includes a conductive portion 121 and a blocking portion 122 stacked in a direction away from the substrate 111. The outer contour of the orthographic projection of the blocking portion 122 on the substrate 111 is located outside the outer contour of the orthographic projection of the conductive portion 121 on the substrate 111.

[0133] In one embodiment, the conductive part 121 is made of aluminum.

[0134] In one embodiment, the blocking part 122 is made of titanium or molybdenum.

[0135] In one embodiment, the first sidewall 12b includes a first subwall 12b1, which is disposed on the side of the conductive portion 121 near the isolation opening 12a; the second sidewall 12c includes a fourth subwall 12c1, which is disposed on the side of the conductive portion 121 away from the isolation opening 12a; the average roughness of the first subwall 12b1 is less than the average roughness of the fourth subwall 12c1. The second electrode 133 covers a portion of the first subwall 12b1, that is, the second electrode 133 overlaps with the first subwall 12b1. This effectively makes the average roughness of the sidewall of the conductive portion 121 near the isolation opening 12a less than the average roughness of the sidewall of the conductive portion 121 away from the isolation opening 12a. In this way, when the process engineer makes the isolation structure 12, he roughens the sidewall of the conductive part 121, which can make the average roughness of the first sidewall 12b and the average roughness of the second sidewall 12c different, thereby meeting the connection requirements of the second electrode 133, the encapsulation part 14 and the isolation structure 12.

[0136] In one embodiment, the encapsulation portion 14 further covers at least a portion of the fourth sub-wall 12c1. This facilitates a tighter bond between the encapsulation portion 14 and the fourth sub-wall 12c1, improving the encapsulation performance of the encapsulation portion 14.

[0137] In one embodiment, the encapsulation portion 14 also covers a portion of the first sub-wall 12b1. Specifically, the second electrode 133 does not completely cover the first sub-wall 12b1, and the remaining portion of the first sub-wall 12b1 is covered by the encapsulation portion 14. This increases the coverage area of ​​the encapsulation portion 14 and reduces the risk of encapsulation failure.

[0138] In one embodiment, reference Figure 2 As shown, the slope of the first sub-wall 12b1 surface is continuous, while the slope of the fourth sub-wall 12c1 surface is discontinuous. That is, the slope of the first sub-wall 12b1 surface changes relatively continuously, while the slope of the fourth sub-wall 12c1 surface changes abruptly in certain regions. This allows the surface of the first sub-wall 12b1 to be relatively smooth, while the surface of the fourth sub-wall 12c1 is relatively rough.

[0139] In one embodiment, the surface of the fourth sub-wall 12c1 has an uneven structure. This increases the surface roughness of the fourth sub-wall 12c1.

[0140] In one embodiment, the surface of the fourth sub-wall 12c1 is provided with burrs and / or toothed protrusions 12c11. This increases the surface roughness of the fourth sub-wall 12c1. It is understood that the toothed protrusions 12c11 (or burrs) can be arranged regularly or irregularly on the surface of the fourth sub-wall 12c1. The heights of the toothed protrusions 12c11 (or burrs) can be equal or unequal.

[0141] In one embodiment, the surface of the first sub-wall 12b1 is a smooth surface. It should be noted that the smoothness here can be approximate.

[0142] In one embodiment, the first sidewall 12b further includes a second sub-wall 12b2 and a third sub-wall 12b3. The second sub-wall 12b2 is disposed on the side of the blocking portion 122 near the isolation opening 12a, and the third sub-wall 12b3 is disposed on the side of the blocking portion 122 near the substrate 111, and connects the first sub-wall 12b1 and the second sub-wall 12b2. The encapsulation portion 14 also covers the second sub-wall 12b2 and the third sub-wall 12b3. This increases the coverage area of ​​the encapsulation portion 14 and reduces the risk of encapsulation failure.

[0143] In one embodiment, the second sidewall 12c further includes a fifth sub-wall 12c2 and a sixth sub-wall 12c3. The fifth sub-wall 12c2 is located on the side of the blocking portion 122 away from the isolation opening 12a, and the sixth sub-wall 12c3 is located on the side of the blocking portion 122 near the substrate 111, and connects the fourth sub-wall 12c1 and the fifth sub-wall 12c2. The encapsulation portion 14 also covers the fifth sub-wall 12c2 and the sixth sub-wall 12c3. This increases the coverage area of ​​the encapsulation portion 14 and reduces the risk of encapsulation failure.

[0144] It is understandable that the second sub-wall 12b2 and the fifth sub-wall 12c2 can also have roughness differences, as can the third sub-wall 12b3 and the sixth sub-wall 12c3.

[0145] In one embodiment, such as Figure 1 As shown, the isolation structure 12, on the side away from the substrate 111, is further provided with a stacked light-emitting material layer 151 and a first electrode material layer 152. The encapsulation portion 14 also covers the side of the first electrode material layer 152 away from the substrate 111.

[0146] In one embodiment, the light-emitting material layer 151 on the isolation structure 12 is disposed in the same layer as the light-emitting functional part 132 of the light-emitting element 13 corresponding to the isolation structure 12; the first electrode material layer 152 on the isolation structure 12 is disposed in the same layer as the second electrode 133 of the light-emitting element 13 corresponding to the isolation structure 12. It should be noted that during the fabrication of the light-emitting functional part 132 and the second electrode 133, the materials of the light-emitting functional part 132 and the second electrode 133 are deposited onto the top surface of the isolation structure 12, thereby forming the light-emitting material layer 151 and the first electrode material layer 152. During the fabrication of the encapsulation part 14, the encapsulation part 14 covers the light-emitting material layer 151 and the first electrode material layer 152.

[0147] In one embodiment, a second electrode material layer 153 is further provided on the second sidewall 12c of the isolation structure 12, and the encapsulation portion 14 further covers the second electrode material layer 153. Further, the second electrode material layer 153 is located at the root of the second sidewall 12c.

[0148] In one embodiment, the second electrode material layer 153 on the isolation structure 12 is disposed on the same layer as the second electrode 133 of the light-emitting element 13 corresponding to the isolation structure 12. It should be noted that during the fabrication of the second electrode 133, the material of the second electrode 133 is deposited onto the second sidewall 12c to form the second electrode material layer 153. During the fabrication of the encapsulation part 14, the encapsulation part 14 covers the second electrode material layer 153.

[0149] In one embodiment, combined Figure 1 and Figure 2 As shown, the encapsulation portion 14 includes a main body portion 141 and an extension portion 142 connected to the main body portion 141. The main body portion 141 covers the surface of the light-emitting element 13 away from the substrate 111, and the extension portion 142 covers a portion of the first sub-wall 12b1, the third sub-wall 12b3, the second sub-wall 12b2, the first electrode material layer 152, the fifth sub-wall 12c2, the sixth sub-wall 12c3, a portion of the fourth sub-wall 12c1, and the second electrode material layer 153. This allows for a larger contact area between the encapsulation portion 14 and the isolation structure 12, improving the bonding tightness between the encapsulation portion 14 and the isolation structure 12, and reducing the risk of encapsulation failure.

[0150] In one embodiment, the encapsulation portion 14 further includes a raised portion 143, one end of which is connected to the end of the extension portion 142 away from the main body portion 141, and the other end of the raised portion 143 extends in a direction away from the second sidewall 12c. By providing the raised portion 143, the contact area between the encapsulation portion 14 and other film layers in the display panel 10 can be increased, the bonding tightness between the encapsulation portion 14 and other film layers in the display panel 10 can be improved, and the risk of encapsulation failure of the encapsulation portion 14 can be reduced.

[0151] In one embodiment, the display panel 10 further includes an insulating structure 16 disposed between the isolation structure 12 and the substrate 111; at least a portion of the surface of the raised portion 143 near the substrate 111 is spaced apart from the surface of the insulating structure 16 away from the substrate 111.

[0152] In one embodiment, the insulating structure 16 includes a pixel defining layer, and at least a portion of the surface of the raised portion 143 on the side near the substrate 111 is spaced apart from the surface of the pixel defining layer on the side away from the substrate 111.

[0153] In one embodiment, the plurality of light-emitting elements 13 includes a plurality of first light-emitting elements, a plurality of second light-emitting elements, and a plurality of third light-emitting elements, which are used to emit light of different colors. The plurality of isolation structures 12 may include three isolation structures 12 with different shapes, each corresponding to a light-emitting element 13 of a different color. Specifically, the plurality of isolation structures 12 includes a plurality of first isolation structures, a plurality of second isolation structures, and a plurality of third isolation structures, and the specific shapes of the first isolation structures, second isolation structures, and third isolation structures may be different. The first light-emitting elements are correspondingly disposed in the isolation openings 12a of the first isolation structures, the second light-emitting elements are correspondingly disposed in the isolation openings 12a of the second isolation structures, and the third light-emitting elements are correspondingly disposed in the isolation openings 12a of the third isolation structures.

[0154] In one embodiment, reference Figure 5 As shown, the display panel 10 also includes a first auxiliary electrode 191 and a second auxiliary electrode 192. The first auxiliary electrode 191 is disposed between the isolation structure 12 and the substrate 111 and is electrically connected to the isolation structure 12. The second auxiliary electrode 192 is disposed between the light-emitting element 13 and the substrate 111 and is electrically connected to the first electrode 191.

[0155] It is understood that the array substrate 11 of the display panel 10 is provided with a pixel driving circuit, and both the first electrode 131 and the second electrode 133 need to be electrically connected to the pixel driving circuit. By providing the first auxiliary electrode 191 and the second auxiliary electrode 192, it is convenient to electrically connect the first electrode 131 and the second electrode 133 to the pixel driving circuit.

[0156] In one embodiment, the first auxiliary electrode 191 and the second auxiliary electrode 192 are disposed in the same layer. This allows the first auxiliary electrode 191 and the second auxiliary electrode 192 to be manufactured in the same process, which helps to reduce the manufacturing cost of the display panel 10.

[0157] In one embodiment, the display panel 10 further includes a first encapsulation layer 17 and a second encapsulation layer 18. The first encapsulation layer 17 is disposed on the side of the isolation structure 12 away from the substrate 111 and on the side of the light-emitting element 13 away from the substrate 111. The second encapsulation layer 18 is disposed on the side of the first encapsulation layer 17 away from the substrate 111. This is beneficial for further improving the encapsulation performance of the display panel 10, thereby extending the service life of the display panel 10.

[0158] In one embodiment, the first encapsulation layer 17 comprises an organic material, and the second encapsulation layer 18 comprises an inorganic material.

[0159] In one embodiment, a portion of the first encapsulation layer 17 is also disposed between two adjacent isolation structures 12. This effectively fills the gap between adjacent isolation structures 12 with the first encapsulation layer 17, eliminating the need for additional filling material.

[0160] In one embodiment, the array substrate 11 includes a substrate 111, a first semiconductor layer 112, a first insulating layer 113, a first metal layer 114, a second insulating layer 115, a second metal layer 116, a third insulating layer 117, a second semiconductor layer 118, a fourth insulating layer 119, a metal oxide layer 1110, a fifth insulating layer 1111, a third metal layer 1112, a first planarization layer 1113, a fourth metal layer 1114, a second planarization layer 1115, a fifth metal layer 1116, and a third planarization layer 1117, which are stacked sequentially. The pixel driving circuit includes devices such as transistors and capacitors, which are disposed in the aforementioned film layers.

[0161] In one embodiment, the first auxiliary electrode 191 and the second auxiliary electrode 192 are located in the fifth metal layer 1116.

[0162] It is understood that the display panel 10 may also include a touch layer, a polarizer, and a cover plate disposed on the second encapsulation layer 18.

[0163] Secondly, embodiments of this application provide a display panel 10, which includes a substrate 111 and a plurality of isolation structures 12. The plurality of isolation structures 12 are arranged at intervals on one side of the substrate 111. The isolation structure 12 includes a conductive portion 121 and a blocking portion 122 stacked in a direction away from the substrate 111. The outer contour of the orthographic projection of the blocking portion 122 on the substrate 111 is located outside the outer contour of the orthographic projection of the conductive portion 121 on the substrate 111. The isolation structure 12 also includes a first sidewall 12b and a second sidewall 12c. The first sidewall 12b surrounds and forms an isolation opening 12a. The second sidewall 12c is located on the side of the isolation structure 12 away from the isolation opening 12a. The first sidewall 12b includes a first subwall 12b1, which is located on the side of the conductive portion 121 near the isolation opening 12a. The second sidewall 12c includes a fourth subwall 12c1, which is located on the side of the conductive portion 121 away from the isolation opening 12a. The slope of the surface of the first subwall 12b1 is continuous, while the slope of the surface of the fourth subwall 12c1 is discontinuous.

[0164] In this embodiment, by making the slope of the first sub-wall 12b1 continuous and the slope of the fourth sub-wall 12c1 discontinuous, it is equivalent to making the surface of the first sub-wall 12b1 relatively rough and the surface of the fourth sub-wall 12c1 relatively smooth. This benefits both the tighter bonding between the encapsulation portion 14 in the display panel 10 and the fourth sub-wall 12c1 of the isolation structure 12, improving encapsulation performance, and the connection between the electrodes of the light-emitting element 13 in the display panel 10 and the first sub-wall 12b1, improving the electrical connection performance between the electrodes of the light-emitting element 13 and the isolation structure 12, mitigating display defects caused by poor contact between the light-emitting element 13 and the isolation structure 12, and ultimately improving the display effect.

[0165] It should be noted that the display panel 10 in the second aspect may be the same as the display panel 10 in the first aspect. The specific structure of the display panel 10 in the second aspect will not be described in detail in this embodiment.

[0166] Thirdly, referring to Figure 6 As shown, this application embodiment provides a method for manufacturing a display panel 10, which specifically includes the following steps:

[0167] S100: Provides substrate 111.

[0168] S200: A plurality of isolation structures 12 are formed on one side of the substrate 111. The isolation structure 12 includes a first sidewall 12b and a second sidewall 12c. The first sidewall 12b surrounds and forms an isolation opening 12a. The second sidewall 12c is disposed on the side of the isolation structure 12 away from the isolation opening 12a. The average roughness of the first sidewall 12b is less than the average roughness of the second sidewall 12c.

[0169] The method for manufacturing the display panel 10 provided in this application embodiment makes the average roughness of the first sidewall 12b of the isolation structure 12 smaller than the average roughness of the second sidewall 12c. This has two advantages: firstly, it facilitates a tighter bond between the encapsulation portion 14 in the display panel 10 and the second sidewall 12c of the isolation structure 12, improving encapsulation performance; secondly, it facilitates the connection between the electrode of the light-emitting element 13 in the display panel 10 and the first sidewall 12b, improving the electrical connection performance between the electrode of the light-emitting element 13 and the isolation structure 12, improving the display defects caused by poor contact between the light-emitting element 13 and the isolation structure 12, and enhancing the display effect.

[0170] In one embodiment, reference Figure 7 As shown, S200: A plurality of isolation structures 12 and a plurality of light-emitting elements 13 are formed on one side of the substrate 111, specifically including the following steps:

[0171] S210: A plurality of initial isolation structures are formed on one side of the substrate 111. The initial isolation structure includes a first initial sidewall and a second sidewall 12c. The first initial sidewall surrounds and forms an isolation opening 12a. The second sidewall 12c is disposed on the side of the initial isolation structure away from the isolation opening 12a.

[0172] Specifically, an isolation structure material is first formed on one side of the substrate 111. Then, the isolation structure material is etched to form multiple initial isolation structures. It should be noted that after this step, the average roughness of the first initial sidewall and the average roughness of the second sidewall 12c are approximately equal.

[0173] S220: The first initial sidewall of the initial isolation structure is surface-treated to form an isolation structure 12 having a first sidewall 12b. Specifically, an acidic solution can be used to treat the first initial sidewall of the isolation structure 12 to remove burrs (or protrusions) on the first initial sidewall. In some examples, the isolation structure 12 includes a conductive portion 121 and a blocking portion 122 stacked in a direction away from the substrate 111, wherein the outer contour of the orthographic projection of the blocking portion 122 on the substrate 111 is located outside the outer contour of the orthographic projection of the conductive portion 121 on the substrate 111. The first sidewall 12b includes a first sub-wall 12b1, which is disposed on the side of the conductive portion 121 near the isolation opening 12a; the second sidewall 12c includes a fourth sub-wall 12c1, which is disposed on the side of the conductive portion 121 away from the isolation opening 12a. In S220, the first sub-wall 12b1 is surface treated so that the average roughness of the first sub-wall 12b1 is less than the average roughness of the fourth sub-wall 12c1.

[0174] S230: A plurality of light-emitting elements 13 and a plurality of encapsulation portions 14 are formed on one side of the substrate 111. The plurality of light-emitting elements 13 are correspondingly disposed with the isolation openings 12a of the plurality of isolation structures 12; at least a portion of the light-emitting elements 13 is disposed within the corresponding isolation openings 12a; the plurality of encapsulation portions 14 are correspondingly disposed with the plurality of light-emitting elements 13, the encapsulation portions 14 cover the side of the corresponding light-emitting element 13 away from the substrate 111, and extend to the second sidewall 12c and cover at least a portion of the second sidewall 12c; the light-emitting element 13 includes a first electrode 131, a light-emitting functional portion 132 and a second electrode 133 stacked in a direction away from the substrate 111; the second electrode 133 overlaps with the first sidewall 12b and is electrically connected to the isolation structure 12.

[0175] In one embodiment, the plurality of isolation structures 12 include a plurality of first isolation structures, a plurality of second isolation structures, and a plurality of third isolation structures.

[0176] S200: A plurality of isolation structures 12 and a plurality of light-emitting elements 13 are formed on one side of the substrate 111, specifically including the following steps:

[0177] S210: A plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light-emitting elements, a plurality of second light-emitting elements, and a plurality of third light-emitting elements are formed on one side of the substrate 111. The plurality of first light-emitting elements are correspondingly disposed with the isolation openings 12a of the plurality of first isolation structures; the plurality of second light-emitting elements are correspondingly disposed with the isolation openings 12a of the plurality of second isolation structures; and the plurality of third light-emitting elements are correspondingly disposed with the isolation openings 12a of the plurality of third isolation structures.

[0178] Specifically, refer to Figure 8 As shown, S210: A plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light-emitting elements, a plurality of second light-emitting elements, and a plurality of third light-emitting elements are formed on one side of the substrate 111, specifically including the following steps:

[0179] S211: An isolation structure material is formed on one side of the substrate 111.

[0180] S212: The isolation structure material is subjected to a first patterning process to form a plurality of first initial isolation structures. The first initial isolation structure includes a first initial sidewall and a second sidewall 12c. The first initial sidewalls enclose an isolation opening 12a, and the second sidewall 12c is located on the side of the first initial isolation structure away from the isolation opening 12a.

[0181] S213: Surface-treat the first initial sidewall of the first initial isolation structure to form a first isolation structure 12 having a first sidewall 12b. In some examples, an acidic solution is used to remove burrs (or protrusions) on the first initial sidewall to form a relatively smooth first sub-wall 12b1.

[0182] S214: A plurality of first light-emitting elements are formed on one side of the substrate 111. Further, in this step, an encapsulation portion 14 may also be formed on the side of the first light-emitting element away from the substrate 111. The first light-emitting element includes a first electrode 131, a light-emitting functional portion 132, and a second electrode 133 stacked along the direction away from the substrate 111; the second electrode 133 of the first light-emitting element overlaps with the first sidewall 12b and is electrically connected to the first isolation structure 12; the encapsulation portion 14 covers the side of the corresponding first light-emitting element away from the substrate 111, and extends to the second sidewall 12c and covers at least a portion of the second sidewall 12c.

[0183] S215: The isolation structure material is subjected to a second patterning process to form a plurality of second initial isolation structures; the second initial isolation structure includes a first initial sidewall and a second sidewall 12c, the first initial sidewall enclosing to form an isolation opening 12a, and the second sidewall 12c being located on the side of the second initial isolation structure away from the isolation opening 12a.

[0184] S216: Surface-treat the first initial sidewall of the second initial isolation structure to form a second isolation structure 12 having a first sidewall 12b. In some examples, an acidic solution is used to remove burrs (or protrusions) on the first initial sidewall to form a relatively smooth first sub-wall 12b1.

[0185] S217: A plurality of second light-emitting elements are formed on one side of the substrate 111. Further, in this step, an encapsulation portion 14 may also be formed on the side of the second light-emitting element away from the substrate 111. The second light-emitting element includes a first electrode 131, a light-emitting functional portion 132, and a second electrode 133 stacked along the direction away from the substrate 111; the second electrode 133 of the second light-emitting element overlaps with the first sidewall 12b and is electrically connected to the second isolation structure 12; the encapsulation portion 14 covers the side of the corresponding second light-emitting element away from the substrate 111, extends to the second sidewall 12c, and covers at least a portion of the second sidewall 12c.

[0186] S218: The isolation structure material is subjected to a third patterning process to form a plurality of third initial isolation structures; the third initial isolation structure includes a first initial sidewall and a second sidewall 12c, the first initial sidewall encloses to form an isolation opening 12a, and the second sidewall 12c is located on the side of the third initial isolation structure away from the isolation opening 12a;

[0187] S219: The first initial sidewall of the third initial isolation structure is surface treated to form a third isolation structure 12 having a first sidewall 12b; in some examples, an acidic solution is used to remove burrs (or protrusions) on the first initial sidewall to form a relatively smooth first sub-wall 12b1.

[0188] S2110: A plurality of third light-emitting elements are formed on one side of the substrate 111. Further, in this step, an encapsulation portion 14 may be formed on the side of the third light-emitting element away from the substrate 111; the third light-emitting element includes a first electrode 131, a light-emitting functional portion 132, and a second electrode 133 stacked along the direction away from the substrate 111; the second electrode 133 of the third light-emitting element overlaps with the first sidewall 12b and is electrically connected to the third isolation structure 12; the encapsulation portion 14 covers the side of the corresponding third light-emitting element away from the substrate 111, and extends to the second sidewall 12c and covers at least part of the second sidewall 12c.

[0189] Fourthly, refer to Figure 9 As shown, this application provides a display device 1, which includes a display panel 10 as described in either the first aspect or the second aspect.

[0190] The display device 1 can be a laptop computer, mobile phone, wireless device, personal digital assistant (PDA), handheld or portable computer, GPS receiver / navigator, camera, MP4 video player, camcorder, game console, watch, clock, calculator, TV monitor, flat panel display, computer monitor, car display (e.g., odometer display, etc.), navigator, cockpit controller and / or display, camera view display (e.g., display of a rearview camera in a vehicle), electronic photograph, electronic billboard or sign, projector, etc.

[0191] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a plurality of isolation structures arranged at intervals on one side of the substrate; the isolation structure comprises a first sidewall and a second sidewall, the first sidewall is enclosed to form an isolation opening, and the second sidewall is arranged on the side of the isolation structure away from the isolation opening; the average roughness of the first sidewall is smaller than the average roughness of the second sidewall.

2. The display panel of claim 1, wherein, The display panel further comprises: a plurality of light emitting elements arranged on one side of the substrate, at least part of the light emitting elements are arranged in the isolation opening; a plurality of encapsulation portions corresponding to the plurality of isolation openings; the encapsulation portion covers the light emitting element and the side of the isolation structure away from the substrate, and extends to the second sidewall and covers at least part of the second sidewall; Optionally, the encapsulation portion also covers the first sidewall; Optionally, the orthographic projection of the encapsulation portion on the substrate covers the orthographic projection of the isolation structure on the substrate.

3. The display panel of claim 2, wherein, The light emitting element comprises a first electrode, a light emitting functional portion and a second electrode arranged in a stack away from the substrate; the second electrode overlaps with the first sidewall and is electrically connected with the isolation structure.

4. The display panel of claim 3, wherein, The isolation structure comprises a conductive portion and a barrier portion arranged in a stack away from the substrate; the outer contour of the orthographic projection of the barrier portion on the substrate is located at the periphery of the outer contour of the orthographic projection of the conductive portion on the substrate; Optionally, the first sidewall comprises a first sub-wall arranged on the side of the conductive portion close to the isolation opening; the second sidewall comprises a fourth sub-wall arranged on the side of the conductive portion away from the isolation opening; the average roughness of the first sub-wall is smaller than the average roughness of the fourth sub-wall; The encapsulation portion also covers at least part of the fourth sub-wall; Optionally, the second electrode covers part of the first sub-wall; Optionally, the encapsulation portion also covers part of the first sub-wall.

5. The display panel of claim 4, wherein, The slope of the surface of the first sub-wall is continuous, and the slope of the surface of the fourth sub-wall is discontinuous; Optionally, the surface of the fourth sub-wall is a concave-convex structure; Optionally, the surface of the fourth sub-wall is provided with burrs and / or tooth-like protrusions; Optionally, the surface of the first sub-wall is a smooth surface.

6. The display panel of claim 4, wherein, The first sidewall further comprises a second sub-wall and a third sub-wall, the second sub-wall is arranged on the side of the barrier portion close to the isolation opening, the third sub-wall is arranged on the side of the barrier portion close to the substrate, and connects the first sub-wall and the second sub-wall; the encapsulation portion also covers the second sub-wall and the third sub-wall; Optionally, the second sidewall further comprises a fifth sub-wall and a sixth sub-wall, the fifth sub-wall is arranged on the side of the barrier portion away from the isolation opening, the sixth sub-wall is arranged on the side of the barrier portion close to the substrate, and connects the fourth sub-wall and the fifth sub-wall; the encapsulation portion also covers the fifth sub-wall and the sixth sub-wall.

7. The display panel of claim 6, wherein, The side of the isolation structure away from the substrate is also provided with a light emitting material layer and a first electrode material layer arranged in a stack; The encapsulation portion also covers the side of the first electrode material layer away from the substrate; Optionally, the light-emitting material layer on the isolation structure is arranged in the same layer as the light-emitting functional part of the light-emitting element corresponding to the isolation structure; and the first electrode material layer on the isolation structure is arranged in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure. Optionally, a second electrode material layer is further arranged on the second side wall of the isolation structure, and the encapsulation part further covers the second electrode material layer. Optionally, the second electrode material layer on the isolation structure is arranged in the same layer as the second electrode of the light-emitting element corresponding to the isolation structure.

8. The display panel of claim 7, wherein, The encapsulation part comprises a main body part and an extension part connected to the main body part; the main body part covers a side surface of the light-emitting element away from the substrate, and the extension part covers part of the first sub-wall, the third sub-wall, the second sub-wall, the first electrode material layer, the fifth sub-wall, the sixth sub-wall, part of the fourth sub-wall, and the second electrode material layer. Optionally, the encapsulation part further comprises a raised part, one end of the raised part is connected to an end of the extension part away from the main body part, and the other end of the raised part extends away from the second side wall. Optionally, the display panel further comprises an insulating structure arranged between the isolation structure and the substrate; at least part of a surface of the raised part close to the substrate is spaced apart from a side surface of the insulating structure away from the substrate.

9. The display panel of claim 3, wherein, The display panel further comprises: a first auxiliary electrode arranged between the isolation structure and the substrate; the first auxiliary electrode is electrically connected to the isolation structure; a second auxiliary electrode arranged between the light-emitting element and the substrate; the second auxiliary electrode is electrically connected to the first electrode; Optionally, the first auxiliary electrode and the second auxiliary electrode are arranged in the same layer.

10. The display panel of claim 2, wherein, The display panel further comprises: a first encapsulation layer arranged on a side of the isolation structure away from the substrate and a side of the light-emitting element away from the substrate; a second encapsulation layer arranged on a side of the first encapsulation layer away from the substrate; Optionally, the first encapsulation layer comprises an organic material, and the second encapsulation layer comprises an inorganic material; Optionally, part of the first encapsulation layer is further arranged between two adjacent isolation structures.

11. The display panel of claim 2, wherein, The isolation structure comprises a first side wall and a separation opening formed by the first side wall; the light-emitting element is arranged one-to-one corresponding to the separation opening; The orthographic projection of the second side wall on the substrate is arranged on the periphery of the orthographic projection of the first side wall on the substrate.

12. A display panel, characterized by It comprises: a substrate; A plurality of isolation structures are arranged at intervals on one side of the substrate; the isolation structure comprises a conductive part and a barrier part arranged in a stacked manner away from the substrate, the outer contour of the barrier part in the orthogonal projection on the substrate is located at the periphery of the outer contour of the conductive part in the orthogonal projection on the substrate; the isolation structure further comprises a first side wall and a second side wall, the first side wall is enclosed to form an isolation opening, and the second side wall is arranged on the side of the isolation structure away from the isolation opening; the first side wall comprises a first sub-wall, and the first sub-wall is arranged on the side of the conductive part close to the isolation opening; the second side wall comprises a fourth sub-wall, and the fourth sub-wall is arranged on the side of the conductive part away from the isolation opening; the slope of the surface of the first sub-wall is continuous, and the slope of the surface of the fourth sub-wall is discontinuous.

13. The display panel of claim 12, wherein, The surface of the fourth sub-wall is a concave-convex structure, or the surface of the fourth sub-wall is provided with burrs and / or tooth-shaped protrusions, or the surface of the first sub-wall is a smooth surface.

14. The display panel of claim 12, wherein, The display panel further comprises: A plurality of light emitting elements are arranged on one side of the substrate, and at least part of the light emitting elements are arranged in the isolation opening; A plurality of packaging parts are arranged corresponding to the plurality of isolation openings; the packaging part covers the side of the light emitting element and the isolation structure away from the substrate, and extends to the second side wall and covers at least part of the second side wall; Optionally, the packaging part covers at least part of the fourth sub-wall; Optionally, the light emitting element comprises a first electrode, a light emitting functional part and a second electrode arranged in a stacked manner away from the substrate; the second electrode overlaps with the first sub-wall, and is electrically connected with the isolation structure; Optionally, the packaging part also covers part of the first sub-wall.

15. The display panel of claim 14, wherein, The first side wall further comprises a second sub-wall and a third sub-wall, the second sub-wall is arranged on the side of the barrier part close to the isolation opening, the third sub-wall is arranged on the side of the barrier part close to the substrate, and connects the first sub-wall and the second sub-wall; the packaging part also covers the second sub-wall and the third sub-wall; Optionally, the second side wall further comprises a fifth sub-wall and a sixth sub-wall, the fifth sub-wall is arranged on the side of the barrier part away from the isolation opening, the sixth sub-wall is arranged on the side of the barrier part close to the substrate, and connects the fourth sub-wall and the fifth sub-wall; the packaging part also covers the fifth sub-wall and the sixth sub-wall; Optionally, the orthogonal projection of the packaging part on the substrate covers the orthogonal projection of the isolation structure on the substrate; Optionally, the side of the isolation structure away from the substrate is further provided with a light emitting material layer and a first electrode material layer arranged in a stacked manner; The packaging part also covers the side of the first electrode material layer away from the substrate; Optionally, the light emitting material layer on the isolation structure is arranged in the same layer as the light emitting functional part of the light emitting element corresponding to the isolation structure; the first electrode material layer on the isolation structure is arranged in the same layer as the second electrode of the light emitting element corresponding to the isolation structure; Optionally, a second electrode material layer is further provided on the second sidewall of the isolation structure, and the encapsulation portion further covers the second electrode material layer. Optionally, the second electrode material layer on the isolation structure is arranged in the same layer as the second electrode of the light emitting element corresponding to the isolation structure. Optionally, the encapsulation portion includes a main body portion and an extension portion connected to the main body portion; the main body portion covers a side surface of the light emitting element away from the substrate, and the extension portion covers part of the first sub-wall, the third sub-wall, the second sub-wall, the first electrode material layer, the fifth sub-wall, the sixth sub-wall, part of the fourth sub-wall, and the second electrode material layer. Optionally, the encapsulation portion further includes a raised portion, one end of the raised portion is connected to an end of the extension portion away from the main body portion, and the other end of the raised portion extends away from the second sidewall. Optionally, the display panel further includes an insulating structure provided between the isolation structure and the substrate; at least part of a surface of the raised portion close to the substrate is spaced apart from a side surface of the insulating structure away from the substrate.

16. The display panel of claim 15, wherein, The display panel further includes: a first auxiliary electrode provided between the isolation structure and the substrate; the first auxiliary electrode is electrically connected to the isolation structure; a second auxiliary electrode provided between the light emitting element and the substrate; the second auxiliary electrode is electrically connected to the first electrode; Optionally, the first auxiliary electrode and the second auxiliary electrode are arranged in the same layer. Optionally, the display panel further includes: a first encapsulation layer provided on a side of the isolation structure away from the substrate and a side of the light emitting element away from the substrate; a second encapsulation layer provided on a side of the first encapsulation layer away from the substrate; Optionally, the first encapsulation layer includes an organic material, and the second encapsulation layer includes an inorganic material; Optionally, part of the first encapsulation layer is further provided between two adjacent isolation structures; Optionally, the isolation structure includes one first sidewall and one isolation opening formed by the one first sidewall; the light emitting element is arranged one-to-one corresponding to the isolation opening; The orthographic projection of the second sidewall on the substrate is enclosed in the periphery of the orthographic projection of the first sidewall on the substrate.

17. A method for manufacturing a display panel, characterized by, It includes: providing a substrate; forming a plurality of isolation structures on one side of the substrate; the isolation structure includes a first sidewall and a second sidewall, the first sidewall encloses an isolation opening, and the second sidewall is provided on a side of the isolation structure away from the isolation opening; the average roughness of the first sidewall is smaller than the average roughness of the second sidewall.

18. The method of producing a display panel according to claim 17, wherein The forming a plurality of isolation structures on one side of the substrate includes: forming a plurality of initial isolation structures on one side of the substrate; the initial isolation structure includes a first initial sidewall and a second sidewall, the first initial sidewall encloses an isolation opening, and the second sidewall is provided on a side of the initial isolation structure away from the isolation opening; performing surface treatment on the first initial sidewall of the initial isolation structure to form the isolation structure with the first sidewall; forming a plurality of light emitting elements and a plurality of encapsulation portions on one side of the substrate; the plurality of light emitting elements are arranged corresponding to the isolation openings of the plurality of isolation structures; at least part of the light emitting elements are arranged in the corresponding isolation openings; the plurality of encapsulation portions are arranged corresponding to the plurality of light emitting elements, the encapsulation portion covers the corresponding light emitting element away from the substrate side, and extends to the second side wall and covers at least part of the second side wall; the light emitting element comprises a first electrode, a light emitting functional portion and a second electrode arranged in a stacking manner away from the substrate; part of the second electrode of the light emitting element covers at least part of the first side wall surrounding the corresponding isolation opening, and is electrically connected with the isolation structure.

19. The method of manufacturing a display panel according to claim 17, wherein, The forming a plurality of isolation structures on one side of the substrate comprises: forming a plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light emitting elements, a plurality of second light emitting elements and a plurality of third light emitting elements on one side of the substrate; the plurality of first light emitting elements are arranged corresponding to the isolation openings of the plurality of first isolation structures; the plurality of second light emitting elements are arranged corresponding to the isolation openings of the plurality of second isolation structures; the plurality of third light emitting elements are arranged corresponding to the isolation openings of the plurality of third isolation structures; Optionally, the forming a plurality of first isolation structures, a plurality of second isolation structures, a plurality of third isolation structures, a plurality of first light emitting elements, a plurality of second light emitting elements and a plurality of third light emitting elements on one side of the substrate comprises: forming an isolation structure material on one side of the substrate; performing a first patterning process on the isolation structure material to form a plurality of first initial isolation structures; the first initial isolation structure comprises a first initial side wall and a second side wall; performing a surface treatment on the first initial side wall of the first initial isolation structure to form a first isolation structure with the first side wall; forming a plurality of the first light emitting elements on one side of the substrate; performing a second patterning process on the isolation structure material to form a plurality of second initial isolation structures; the second initial isolation structure comprises a first initial side wall and a second side wall; performing a surface treatment on the first initial side wall of the second initial isolation structure to form a second isolation structure with the first side wall; forming a plurality of the second light emitting elements on one side of the substrate; performing a third patterning process on the isolation structure material to form a plurality of third initial isolation structures; the third initial isolation structure comprises a first initial side wall and a second side wall; performing a surface treatment on the first initial side wall of the third initial isolation structure to form a third isolation structure with the first side wall; forming a plurality of the third light emitting elements on one side of the substrate.

20. A display device comprising: A display panel comprising any one of the display panels of claims 1-16 or a display panel prepared by the preparation method of any one of claims 17-19.

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