Display panel, preparation method of display panel and electronic device

Abstract

This application provides a display panel, a method for manufacturing the display panel, and an electronic device, relating to the field of display technology. The display panel includes a substrate, an isolation structure, a light-emitting unit, and a first encapsulation layer. The isolation structure forms an isolation opening and includes a first isolation portion and a second isolation portion stacked along a direction away from the substrate. The second isolation portion has a first concave-convex structure on the side facing the substrate, and at least a portion of the light-emitting unit is located within the isolation opening. The first encapsulation layer is located on the side of the light-emitting unit away from the substrate and includes a plurality of encapsulation units spaced apart. The encapsulation units are in contact with at least a portion of the first concave-convex structure. This application can greatly improve the adhesion between the encapsulation units and the second isolation portion facing the substrate, thereby making it less likely for the light-emitting unit to generate dark spots, and thus greatly improving the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel, a method for manufacturing the display panel, and an electronic device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide application range, becoming the mainstream display panel. In the traditional display panel manufacturing process, a fine mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also has problems such as limited precision, high development costs, and long development cycles. Maskless technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding the technology of eliminating fine metal masks, and are provided for reference.

[0003] However, there are still some problems with the display panel that need to be addressed. Summary of the Invention

[0004] To overcome the technical problems mentioned in the background, this application provides a display panel, which includes:

[0005] substrate;

[0006] An isolation structure is located on one side of the substrate. The isolation structure encloses and forms an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The side of the second isolation portion facing the substrate has a first concave-convex structure.

[0007] The light-emitting unit is at least partially located within the isolation opening;

[0008] A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart, and the encapsulation units are in contact with at least a portion of the first uneven structure.

[0009] In some possible implementations, the isolation structure further includes a third isolation portion located between the first isolation portion and the second isolation portion, the third isolation portion having a second convex-concave structure on the side away from the substrate, the second convex-concave structure being interlocked with the first convex-concave structure;

[0010] Preferably, along the thickness direction of the substrate, the thickness of the third insulating portion is greater than or equal to... and less than or equal to

[0011] In some possible implementations, the material of the third isolation portion has a columnar crystal structure;

[0012] Preferably, the material of the third isolation section includes molybdenum.

[0013] In some possible implementations, the orthographic projection of the side of the third isolation portion away from the substrate onto the substrate lies within the orthographic projection of the second isolation portion onto the substrate;

[0014] Preferably, the orthographic projection of the side of the third isolation portion closer to the substrate on the substrate coincides with the orthographic projection of the side of the first isolation portion farther from the substrate on the substrate.

[0015] In some possible implementations, the packaging unit extends sequentially from the first isolation portion, the side of the third isolation portion toward the isolation opening, and the side of the second isolation portion toward the substrate to the side of the second isolation portion away from the substrate.

[0016] In some possible implementations, the packaging unit is fitted into the first convex-concave structure;

[0017] Preferably, the portion of the packaging unit that engages with the first convex-concave structure has a third convex-concave structure on the side facing the substrate.

[0018] In some possible implementations, the side of the second isolation portion away from the substrate has a fourth convex-concave structure at a position opposite to the first convex-concave structure.

[0019] In some possible implementations, the shape of the first convex-concave structure includes a serrated shape along a cross section perpendicular to the substrate.

[0020] In some possible embodiments, the first uneven structure includes a recessed portion along a cross-section perpendicular to the substrate, the depth of the recessed portion being greater than or equal to... and less than or equal to

[0021] In some possible implementations, the packaging units are spaced apart on the side of the isolation structure away from the substrate;

[0022] Preferably, there is a gap between the packaging unit located on the side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate.

[0023] In some possible implementations, the display panel further includes a second encapsulation layer located on the side of the first encapsulation layer away from the substrate;

[0024] Preferably, the display panel further includes a third encapsulation layer located on the side of the second encapsulation layer away from the substrate;

[0025] Preferably, the materials of both the first encapsulation layer and the third encapsulation layer include inorganic materials;

[0026] Preferably, the material of the second encapsulation layer includes an organic material.

[0027] In some possible implementations, the light-emitting unit includes a first electrode, a light-emitting portion, and a second electrode sequentially stacked along a direction away from the substrate, wherein the second electrode is electrically connected to the first isolation portion;

[0028] Preferably, the isolation structure further includes a fourth isolation portion located on the side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the fourth isolation portion;

[0029] Preferably, the material of the fourth isolation portion includes molybdenum; and / or, the material of the first isolation portion includes aluminum; and / or, the material of the second isolation portion includes titanium.

[0030] In some possible implementations, this application also provides a display panel, the display panel comprising:

[0031] substrate;

[0032] An isolation structure is located on one side of the substrate. The isolation structure encloses and forms an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The roughness of the side of the second isolation portion facing the substrate is greater than the roughness of the side of the first isolation portion away from the substrate.

[0033] The light-emitting unit is at least partially located within the isolation opening;

[0034] A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart. The encapsulation units are in contact with at least a portion of the second isolation portion on the side facing the substrate.

[0035] In some possible implementations, the isolation structure further includes a third isolation portion located between the first isolation portion and the second isolation portion, wherein the roughness of the third isolation portion on the side away from the substrate is equal to the roughness of the second isolation portion on the side facing the substrate;

[0036] Preferably, the side of the third isolation portion away from the substrate is in contact with the side of the second isolation portion facing the substrate;

[0037] Preferably, the roughness of the side of the third isolation portion away from the substrate is greater than the roughness of the side of the third isolation portion facing the substrate;

[0038] Preferably, along the thickness direction of the substrate, the thickness of the third insulating portion is greater than or equal to... and less than or equal to

[0039] In some possible implementations, the roughness of the second isolation portion on the side facing the substrate is equal to the roughness of the second isolation portion on the side away from the substrate.

[0040] In some possible implementations, the material of the third isolation portion has a columnar crystal structure;

[0041] Preferably, the material of the third isolation section includes molybdenum.

[0042] In some possible implementations, the packaging unit extends sequentially from the first isolation portion, the side of the third isolation portion toward the isolation opening, and the side of the second isolation portion toward the substrate to the side of the second isolation portion away from the substrate;

[0043] Preferably, the orthographic projection of the side of the third isolation portion away from the substrate onto the substrate is located within the orthographic projection of the second isolation portion onto the substrate;

[0044] Preferably, the orthographic projection of the side of the third isolation portion closer to the substrate on the substrate coincides with the orthographic projection of the side of the first isolation portion farther from the substrate on the substrate.

[0045] In some possible implementations, this application also provides a method for manufacturing a display panel, the method comprising:

[0046] Provide substrate;

[0047] An isolation structure is formed on one side of the substrate, and the isolation structure encloses an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The side of the second isolation portion facing the substrate has a first concave-convex structure.

[0048] At least a portion of the light-emitting units are formed within the isolation opening, and a first encapsulation layer is formed on the side of the light-emitting units away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart, and the encapsulation units are in contact with at least a portion of the first concave-convex structure.

[0049] In some possible implementations, the step of forming an isolation structure on one side of the substrate includes:

[0050] A pixel defining material layer, a first isolation material layer, a third isolation material layer, and a second isolation material layer are sequentially formed on one side of the substrate. The third isolation material layer has a second concave-convex structure on the side away from the substrate, and the second isolation material layer has a first concave-convex structure that interlocks with the second concave-convex structure on the side facing the substrate.

[0051] The second isolation material layer, the third isolation material layer, the first isolation material layer, and the pixel defining material layer are sequentially patterned to form the second isolation portion, the third isolation portion, and the first isolation portion of the isolation structure, as well as the pixel defining layer.

[0052] In some possible implementations, this application also provides an electronic device, which includes the display panel described in this application, or a display panel prepared by the method for preparing the display panel described in this application.

[0053] Compared with the prior art, this application has the following beneficial effects:

[0054] The present application provides a display panel, a method for manufacturing the display panel, and an electronic device. By providing a first concave-convex structure on the side of the second isolation portion facing the substrate, and having the encapsulation unit in contact with the first concave-convex structure, the adhesion between the encapsulation unit and the side of the second isolation portion facing the substrate can be greatly improved, thereby making it less likely for the light-emitting unit to generate dark spots, and thus greatly improving the display effect of the display panel. Attached Figure Description

[0055] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 A cross-sectional schematic diagram of the second isolation portion of the isolation structure of the display panel provided in the embodiments of this application, including the first concave-convex structure;

[0057] Figure 2 The isolation structure of the display panel provided in the embodiments of this application also includes a cross-sectional schematic diagram of a third isolation portion;

[0058] Figure 3 A cross-sectional schematic diagram of the encapsulation unit of the display panel provided in the embodiments of this application, including a third concave-convex structure;

[0059] Figure 4 A cross-sectional schematic diagram of the second isolation portion of the display panel provided in the embodiments of this application, including a fourth concave-convex structure on the side away from the substrate;

[0060] Figure 5 A cross-sectional schematic diagram of a display panel with a first serrated concave-convex structure provided in an embodiment of this application;

[0061] Figure 6 A cross-sectional schematic diagram of the display panel provided in the embodiments of this application, including a second encapsulation layer and a third encapsulation layer;

[0062] Figure 7 A schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0063] Figure 8 A cross-sectional schematic diagram showing a pixel defining material layer, a first isolation material layer, and a third isolation material layer sequentially formed on one side of a substrate, as provided in an embodiment of this application;

[0064] Figure 9 A cross-sectional schematic diagram showing a second isolation material layer formed on the side of the third isolation material layer away from the substrate, provided for an embodiment of this application;

[0065] Figure 10 This is a cross-sectional schematic diagram showing the patterning of the second isolation material layer, the third isolation material layer, the first isolation material layer, and the pixel defining material layer in sequence, as provided in an embodiment of this application.

[0066] Reference numerals: 1. Substrate; 2. Pixel defining layer; 21. Pixel opening; 3. Isolation structure; 31. First isolation portion; 32. Second isolation portion; 321. First concave-convex structure; 322. Fourth concave-convex structure; 33. Third isolation portion; 331. Second concave-convex structure; 34. Fourth isolation portion; 4. First electrode; 5. Light-emitting portion; 6. Second electrode; 7. Light-emitting unit; 8. First encapsulation layer; 81. Encapsulation unit; 811. Third concave-convex structure; 9. Isolation opening; 10. Second encapsulation layer; 11. Third encapsulation layer; 12. Pixel defining material layer; 13. First isolation material layer; 14. Third isolation material layer; 15. Second isolation material layer. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0068] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0069] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0071] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0072] Increasing the density of light-emitting units (i.e., pixel density) in a display panel is a crucial way to improve display quality. However, current display panels manufactured using Fine Metal Mask (FMM) technology are limited by technological constraints that prevent further increases in light-emitting unit density. Through long-term research, the inventors discovered that to address this technical challenge, some display panels incorporate isolation structures. During the full-layer deposition of the light-emitting functional layer and the second electrode, the light-emitting functional layer and the second electrode can be disconnected at the isolation structure. Through multiple deposition and etching processes (i.e., light-emitting unit patterning), light-emitting units of different colors can be formed within different isolation openings.

[0073] The display panel in the related technology includes a substrate, an isolation structure located on one side of the substrate, a light-emitting unit located within an isolation opening formed by the isolation structure, and an encapsulation unit located on the side of the light-emitting unit away from the substrate. The encapsulation unit can encapsulate the light-emitting unit.

[0074] However, in related technologies, the adhesion between the encapsulation unit and the isolation structure is not strong, and gaps are easily generated between the encapsulation unit and the isolation structure. In the subsequent manufacturing process of the display panel, chemical solutions can easily damage part of the isolation structure through the gaps, causing poor bonding between the second electrode of the light-emitting unit and the isolation structure, resulting in dark spots in the light-emitting unit and ultimately affecting the display effect of the display panel.

[0075] To address the aforementioned technical problems, the inventors have innovatively designed the following technical solutions, which will be described in detail below with reference to the accompanying drawings. It should be noted that the deficiencies in the existing solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the aforementioned technical problems and the solutions proposed in this embodiment below are contributions made by the inventors to this application during the invention process, and should not be construed as technical content known to those skilled in the art.

[0076] Please see Figure 1 This embodiment provides a display panel, which includes a substrate 1, an isolation structure 3, a light-emitting unit 7, and a first encapsulation layer 8.

[0077] The substrate 1 may include a substrate and a plurality of driving units located on one side of the substrate, each driving unit may include one or more semiconductor switching devices. The semiconductor switching devices may be formed by the interaction of multiple film layers in the substrate 1; for example, the semiconductor switching devices may be thin-film transistors formed by the interaction of multiple film layers.

[0078] The isolation structure 3 is located on one side of the substrate 1. The isolation structure 3 encloses and forms an isolation opening 9. The isolation structure 3 includes a first isolation part 31 and a second isolation part 32 stacked in a direction away from the substrate 1. The orthographic projection of the side of the first isolation part 31 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation part 32 on the substrate 1. The side of the second isolation part 32 facing the substrate 1 has a first concave-convex structure 321.

[0079] At least a portion of the light-emitting unit 7 is located within the isolation opening 9; the first encapsulation layer 8 is located on the side of the light-emitting unit 7 away from the substrate 1, and the first encapsulation layer 8 includes a plurality of encapsulation units 81 spaced apart, and the encapsulation units 81 are in contact with at least a portion of the first concave-convex structure 321.

[0080] In related technologies, the side of the second isolation portion 32 facing the substrate 1 is flat, the adhesive force between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1 is small, and gaps are easily generated between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1. The liquid can easily damage the first isolation portion 31 through the gap, resulting in poor overlap between the second electrode 6 of the light-emitting unit 7 and the first isolation portion 31.

[0081] In this embodiment, by providing a first concave-convex structure 321 on the side of the second isolation portion 32 facing the substrate 1, and by having the encapsulation unit 81 contact the first concave-convex structure 321, the adhesion between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1 can be greatly improved. This makes it less likely for gaps to form between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1, and makes it less likely for liquid to penetrate the first isolation portion 31, thereby making it less likely to damage the first isolation portion 31. This results in a better overlap between the light-emitting unit 7 and the first isolation portion 31, and the light-emitting unit 7 is less likely to produce dark spots, thereby greatly improving the display effect of the display panel.

[0082] Based on the above design, this embodiment provides a first concave-convex structure 321 on the side of the second isolation portion 32 facing the substrate 1, and the encapsulation unit 81 contacts the first concave-convex structure 321, which can greatly improve the adhesion between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1, so that the light-emitting unit 7 is less likely to produce dark spots, thereby greatly improving the display effect of the display panel.

[0083] For some possible implementations, please refer to Figure 2 The isolation structure 3 also includes a third isolation portion 33 located between the first isolation portion 31 and the second isolation portion 32. The third isolation portion 33 has a second concave-convex structure 331 on the side away from the substrate 1. The second concave-convex structure 331 is interlocked with the first concave-convex structure 321.

[0084] A second concave-convex structure 331 is formed on the side of the third isolation portion 33 away from the substrate 1. The second isolation portion 32 is formed on the basis of the third isolation portion 33. When the third isolation portion 33 has the second concave-convex structure 331 on the side away from the substrate 1, a first concave-convex structure 321 matching the second concave-convex structure 331 will naturally be formed on the side of the second isolation portion 32 facing the substrate 1. In this way, there is no need to specially set up a process to form the first concave-convex structure 321, thereby reducing the cost of forming the first concave-convex structure 321.

[0085] Preferably, along the thickness direction Z of the substrate 1, the thickness D of the third isolation portion 33 is greater than or equal to... and less than or equal to For example, the thickness D can be By reasonably setting the thickness D, without excessively increasing the thickness of the isolation structure 3, the overlap area between the encapsulation unit 81 and the isolation structure 3 can be increased, thereby further improving the adhesion between the encapsulation unit 81 and the isolation structure 3, and ultimately making the light-emitting unit 7 less prone to dark spots.

[0086] In some possible implementations, please refer again. Figure 2 The orthographic projection of the side of the third isolation portion 33 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation portion 32 on the substrate 1.

[0087] Optionally, the orthographic projection of the side of the third isolation portion 33 closest to the substrate 1 on the substrate 1 coincides with the orthographic projection of the side of the first isolation portion 31 furthest from the substrate 1 on the substrate 1.

[0088] In this way, the contact between the packaging unit 81 and the third isolation part 33 and the second isolation part 32 can be better, thereby improving the stability of the packaging unit 81.

[0089] In some possible implementations, please refer again. Figure 2 The packaging unit 81 extends sequentially from the side of the first isolation portion 31 and the third isolation portion 33 toward the isolation opening 9 and the side of the second isolation portion 32 toward the substrate 1 to the side of the second isolation portion 32 away from the substrate 1.

[0090] In this way, the packaging unit 81 is in contact with the sides of the first isolation portion 31 and the third isolation portion 33 facing the isolation opening 9, as well as the side of the second isolation portion 32 facing the substrate 1, thereby increasing the contact area between the packaging unit 81 and the isolation structure 3, and thus improving the stability of the packaging unit 81.

[0091] In some possible implementations, the encapsulation unit 81 is fitted into the first concave-convex structure 321; thus, the adhesion between the encapsulation unit 81 and the second isolation portion 32 toward the substrate 1 can be further increased, thereby further improving the stability of the encapsulation unit 81.

[0092] Preferably, please refer to Figure 3 The portion of the encapsulation unit 81 that is fitted with the first uneven structure 321 has a third uneven structure 811 on the side facing the substrate 1. Since the encapsulation unit 81 and the first uneven structure 321 are fitted together, according to the deposition relationship of the film layers, the third uneven structure 811 is naturally formed on the side of the portion of the encapsulation unit 81 that is fitted with the first uneven structure 321 facing the substrate 1.

[0093] For some possible implementations, please refer to Figure 4 The second isolation portion 32 has a fourth convex-concave structure 322 on the side away from the substrate 1 at the opposite position to the first convex-concave structure 321.

[0094] Since the third isolation portion 33 has a second concave-convex structure 331 on the side away from the substrate 1, according to the deposition relationship of the film layer, a first concave-convex structure 321 that fits into the second concave-convex structure 331 will be naturally formed on the side of the second isolation portion 32 facing the substrate 1, and a fourth concave-convex structure 322 that corresponds to the second concave-convex structure 331 will be naturally formed on the side of the second isolation portion 32 away from the substrate 1.

[0095] For some possible implementations, please refer to Figure 5 Along a cross section perpendicular to the substrate 1, the shape of the first concave-convex structure 321 includes a serrated shape.

[0096] The encapsulation unit 81 and the serrated first concave-convex structure 321 are interlocked, which can further improve the adhesion between the encapsulation unit 81 and the second isolation portion 32 on the side facing the substrate 1, thereby further improving the stability of the encapsulation unit 81.

[0097] In some possible implementations, the material of the third isolation section 33 has a columnar crystal structure.

[0098] Since the crystal structure of the material of the third isolation portion 33 is columnar, for example, the material of the third isolation portion 33 includes molybdenum, according to the material characteristics of the third isolation portion 33, when the third isolation portion 33 is formed, the side of the third isolation portion 33 away from the substrate 1 will be roughened, and a second uneven structure 331 with serrations will naturally be formed on the side of the third isolation portion 33 away from the substrate 1. In this way, there is no need to specially set up a process to form the second uneven structure 331, thereby reducing the cost of forming the second uneven structure 331.

[0099] Based on the deposition relationship of the film layers, the first uneven structure 321, the third uneven structure 811, and the fourth uneven structure 322 all have a serrated structure. Therefore, no special process is needed to form the serrated first uneven structure 321, thereby reducing the cost of forming the serrated first uneven structure 321.

[0100] In some possible implementations, please refer again. Figure 5 The first concave-convex structure 321 includes a recessed portion, and along a cross-section perpendicular to the substrate 1, the depth H of the recessed portion is greater than or equal to... and less than or equal to For example, depth H can be By reasonably setting the depth H, while ensuring the stability of the second isolation part 32, the adhesion between the packaging unit 81 and the second isolation part 32 on the side facing the substrate 1 can be further improved.

[0101] In some possible implementations, please refer again. Figure 5 The packaging unit 81 is spaced apart on the side of the isolation structure 3 away from the substrate 1, and there is a gap between the packaging unit 81 on the side of the isolation structure 3 away from the substrate 1 and the side of the isolation structure 3 away from the substrate 1.

[0102] During the patterning process of the light-emitting unit 7, the first encapsulation material layer is broken at the isolation structure 3 to form an encapsulation unit 81. The encapsulation unit 81 can completely and independently encapsulate the corresponding light-emitting unit 7, thereby improving the display characteristics of the display panel.

[0103] For some possible implementations, please refer to Figure 6 The display panel also includes a second encapsulation layer 10 located on the side of the first encapsulation layer 8 away from the substrate 1 and a third encapsulation layer 11 located on the side of the second encapsulation layer 10 away from the substrate 1.

[0104] Optionally, the materials of the first encapsulation layer 8 and the third encapsulation layer 11 both include inorganic materials, and the material of the second encapsulation layer 10 includes organic materials.

[0105] For example, the first encapsulation layer 8 and the third encapsulation layer 11 can be formed by chemical vapor deposition (CVD), and the second encapsulation layer 10 can be formed by inkjet printing (IJP). The second encapsulation layer 10 and the third encapsulation layer 11 can achieve a better encapsulation effect on the light-emitting unit 7, thereby further improving the encapsulation quality of the display panel.

[0106] In some possible implementations, please refer again. Figure 5The light-emitting unit 7 includes a first electrode 4, a light-emitting part 5, and a second electrode 6 stacked sequentially along the direction away from the substrate 1. The second electrode 6 is electrically connected to the first isolation part 31. The display panel also includes a pixel defining layer 2 located between the first electrode 4 and the isolation structure 3. The isolation structure 3 is located on the side of the pixel defining layer 2 away from the substrate 1. The pixel defining layer 2 includes a pixel opening 21 that exposes part of the first electrode 4. The pixel opening 21 is connected to the isolation opening 9.

[0107] The isolation structure 3 allows the display panel to form film layers of different colors of light-emitting units 7 in different isolation openings 9 without the need for a fine mask. When forming the light-emitting material layer, the isolation structure 3 separates the light-emitting material layer into multiple spaced-apart light-emitting portions 5. When forming the second electrode material layer, the isolation structure 3 separates the second electrode material layer into multiple spaced-apart second electrodes 6. The isolation structure 3 includes a conductive material, and the second electrodes 6 are electrically connected to the isolation structure 3. One first electrode 4, one light-emitting portion 5, and one second electrode 6 form one light-emitting unit 7. The first electrode 4 can be an anode, and the second electrode 6 can be a cathode.

[0108] In this way, different light-emitting units 7 can be made independent of each other, thereby reducing crosstalk between adjacent light-emitting units 7 and improving the display effect of the display panel. At the same time, due to the presence of the isolation structure 3, the light-emitting material layer and the second electrode material layer in each color light-emitting unit 7 of the display panel can be prepared as a whole before patterning, thereby eliminating the need for a fine mask and saving the manufacturing cost of the display panel.

[0109] Preferably, please see again. Figure 6 The isolation structure 3 also includes a fourth isolation section 34 located on the side of the first isolation section 31 facing the substrate 1, and the second electrode 6 is electrically connected to the fourth isolation section 34.

[0110] The fourth isolation section 34 includes a conductive material, and the second electrode 6 corresponding to the light-emitting unit 7 extends to contact the sidewall of the fourth isolation section 34, so as to achieve electrical connection between the second electrode 6 corresponding to the light-emitting unit 7 and the fourth isolation section 34.

[0111] Optionally, the fourth isolation portion 34 may be made of molybdenum; and / or the first isolation portion 31 may be made of aluminum; and / or the second isolation portion 32 may be made of titanium. Thus, when the isolation structure 3 isolates the second electrode material layer as the second electrode 6, the second electrode 6 is more easily electrically connected to the first isolation portion 31 and / or the fourth isolation portion 34.

[0112] In some possible implementations, please refer again. Figure 1 This application also provides a display panel, which includes a substrate 1, an isolation structure 3, a light-emitting unit 7, and a first encapsulation layer 8.

[0113] The isolation structure 3 is located on one side of the substrate 1. The isolation structure 3 encloses and forms an isolation opening 9. The isolation structure 3 includes a first isolation part 31 and a second isolation part 32 stacked in a direction away from the substrate 1. The orthographic projection of the side of the first isolation part 31 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation part 32 on the substrate 1. The roughness of the side of the second isolation part 32 facing the substrate 1 is greater than the roughness of the side of the first isolation part 31 away from the substrate 1.

[0114] At least a portion of the light-emitting unit 7 is located within the isolation opening 9; the first encapsulation layer 8 is located on the side of the light-emitting unit 7 away from the substrate 1, and the first encapsulation layer 8 includes a plurality of encapsulation units 81 spaced apart, and the encapsulation units 81 are in contact with at least a portion of the second isolation portion 32 on the side facing the substrate 1.

[0115] In related technologies, the side of the second isolation portion 32 facing the substrate 1 is flat, the adhesive force between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1 is small, and gaps are easily generated between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1. The liquid can easily damage the first isolation portion 31 through the gap, resulting in poor overlap between the second electrode 6 of the light-emitting unit 7 and the first isolation portion 31.

[0116] In this embodiment, by setting the roughness of the side of the second isolation portion 32 facing the substrate 1 to be greater than the roughness of the side of the first isolation portion 31 away from the substrate 1, and by having at least a partial contact between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1, the adhesion between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1 can be greatly improved. This makes it less likely for gaps to form between the encapsulation unit 81 and the side of the second isolation portion 32 facing the substrate 1, and makes it less likely for liquid to penetrate the first isolation portion 31, thereby making it less likely to damage the first isolation portion 31. This results in a better overlap effect between the light-emitting unit 7 and the first isolation portion 31, and the light-emitting unit 7 is less likely to produce dark spots, thereby greatly improving the display effect of the display panel.

[0117] In some possible implementations, please refer again. Figure 5 The isolation structure 3 also includes a third isolation portion 33 located between the first isolation portion 31 and the second isolation portion 32. The roughness of the side of the third isolation portion 33 away from the substrate 1 is equal to the roughness of the side of the second isolation portion 32 facing the substrate 1.

[0118] Optionally, the side of the third isolation portion 33 away from the substrate 1 contacts the side of the second isolation portion 32 facing the substrate 1.

[0119] Optionally, the roughness of the third isolation portion on the side away from the substrate is greater than the roughness of the third isolation portion on the side facing the substrate.

[0120] Since the roughness of the third isolation portion 33 on the side away from the substrate 1 is relatively large, and the second isolation portion 32 is formed on the basis of the third isolation portion 33, the roughness of the second isolation portion 32 on the side facing the substrate 1 will naturally be equal to the roughness of the third isolation portion 33 on the side away from the substrate 1. Thus, there is no need to set up a special process to increase the roughness of the second isolation portion 32 on the side facing the substrate 1, thereby reducing the corresponding process cost.

[0121] In some possible implementations, the roughness of the side of the second isolation portion 32 facing the substrate 1 is equal to the roughness of the side of the second isolation portion 32 away from the substrate 1. According to the deposition relationship of the film layer, the roughness of the side of the second isolation portion 32 away from the substrate 1 will naturally be equal to the roughness of the side of the second isolation portion 32 facing the substrate 1.

[0122] The remaining solutions for the display panel in this embodiment are the same as those in the above embodiments, and will not be described again here.

[0123] For some possible implementations, please refer to Figure 7 This application also provides a method for manufacturing a display panel, the method comprising:

[0124] S10: Provide substrate 1.

[0125] S11: An isolation structure 3 is formed on one side of the substrate 1. The isolation structure 3 encloses and forms an isolation opening 9. The isolation structure 3 includes a first isolation portion 31 and a second isolation portion 32 stacked in a direction away from the substrate 1. The orthographic projection of the side of the first isolation portion 31 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation portion 32 on the substrate 1. The side of the second isolation portion 32 facing the substrate 1 has a first concave-convex structure 321.

[0126] Please see Figure 8 A pixel defining material layer 12, a first isolation material layer 13 and a third isolation material layer 14 are sequentially formed on one side of the substrate 1.

[0127] The crystal structure of the third isolation material layer 14 is columnar. For example, the material of the third isolation part 33 can be molybdenum. According to the material characteristics of the third isolation material layer 14, when the third isolation material layer 14 is formed, the side of the third isolation material layer 14 away from the substrate 1 will be roughened. A second uneven structure 331 with serrations will naturally be formed on the side of the third isolation material layer 14 away from the substrate 1.

[0128] Please see Figure 9 A second isolation material layer 15 is formed on the side of the third isolation material layer 14 away from the substrate 1.

[0129] Since the third isolation material layer 14 has a second concave-convex structure 331 on the side away from the substrate 1, according to the deposition relationship of the film layers, a first concave-convex structure 321 that is interlocked with the second concave-convex structure 331 will naturally be formed on the side of the second isolation material layer 15 facing the substrate 1, and a fourth concave-convex structure 322 that corresponds to the first concave-convex structure 321 will naturally be formed on the side of the second isolation material layer 15 away from the substrate 1.

[0130] Please see Figure 10 The second isolation material layer 15, the third isolation material layer 14, the first isolation material layer 13 and the pixel defining material layer 12 are patterned sequentially to form the second isolation part 32, the third isolation part 33 and the first isolation part 31 of the isolation structure 3 and to form the pixel defining layer 2.

[0131] Thus, the third isolation portion 33 has a second concave-convex structure 331 on the side away from the substrate 1, the second isolation portion 32 has a first concave-convex structure 321 on the side facing the substrate 1, and the second isolation portion 32 has a fourth concave-convex structure 322 on the side away from the substrate 1.

[0132] S12: At least a portion of the light-emitting unit 7 is formed in the isolation opening 9 and a first encapsulation layer 8 is formed on the side of the light-emitting unit 7 away from the substrate 1. The first encapsulation layer 8 includes a plurality of encapsulation units 81 spaced apart, and the encapsulation units 81 are in contact with at least a portion of the first convex-concave structure 321.

[0133] Please see again Figure 5 At least a portion of the light-emitting unit 7 is formed within the isolation opening 9, and an encapsulation unit 81 is formed on the side of the light-emitting unit 7 away from the substrate 1.

[0134] When the encapsulation unit 81 is formed by the above method, the encapsulation unit 81 extends from the side of the isolation structure 3 away from the substrate 1 to the side of the isolation structure 3 away from the substrate 1. The encapsulation unit 81 can be fitted together with the first concave-convex structure 321, which can greatly improve the adhesion between the encapsulation unit 81 and the second isolation part 32 facing the substrate 1. This makes it less likely for gaps to be generated between the encapsulation unit 81 and the second isolation part 32 facing the substrate 1, and the liquid is less likely to penetrate into the first isolation part 31, thereby making it less likely to damage the first isolation part 31. This results in a better overlap effect between the light-emitting unit 7 and the first isolation part 31, and the light-emitting unit 7 is less likely to produce dark spots, thereby greatly improving the display effect of the display panel.

[0135] In some possible embodiments, this application also provides an electronic device that includes the display panel described in this application, or includes a display panel prepared by the method described in this application. This electronic device may include a device with image processing capabilities, such as a server, personal computer, laptop computer, etc. Because this electronic device includes the display panel described in this application, it has better display quality.

[0136] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0137] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A display panel, characterized in that, The display panel includes: substrate; An isolation structure is located on one side of the substrate. The isolation structure encloses and forms an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The side of the second isolation portion facing the substrate has a first concave-convex structure. The light-emitting unit is at least partially located within the isolation opening; A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart, and the encapsulation units are in contact with at least a portion of the first uneven structure.

2. The display panel according to claim 1, characterized in that, The isolation structure further includes a third isolation portion located between the first isolation portion and the second isolation portion. The third isolation portion has a second concave-convex structure on the side away from the substrate, and the second concave-convex structure is interlocked with the first concave-convex structure. Preferably, along the thickness direction of the substrate, the thickness of the third insulating portion is greater than or equal to... and less than or equal to 3. The display panel according to claim 2, characterized in that, The material of the third isolation section has a columnar crystal structure. Preferably, the material of the third isolation section includes molybdenum.

4. The display panel according to claim 2, characterized in that, The orthographic projection of the side of the third isolation portion away from the substrate onto the substrate is located within the orthographic projection of the second isolation portion onto the substrate. Preferably, the orthographic projection of the side of the third isolation portion closer to the substrate on the substrate coincides with the orthographic projection of the side of the first isolation portion farther from the substrate on the substrate.

5. The display panel according to claim 2, characterized in that, The packaging unit extends sequentially from the first isolation portion, the side of the third isolation portion toward the isolation opening, and the side of the second isolation portion toward the substrate to the side of the second isolation portion away from the substrate.

6. The display panel according to claim 1, characterized in that, The packaging unit is fitted into the first concave-convex structure; Preferably, the portion of the packaging unit that engages with the first convex-concave structure has a third convex-concave structure on the side facing the substrate.

7. The display panel according to claim 1, characterized in that, The side of the second isolation portion away from the substrate has a fourth concave-convex structure at a position opposite to the first concave-convex structure.

8. The display panel according to claim 1, characterized in that, Along a cross section perpendicular to the substrate, the shape of the first uneven structure includes a serrated shape.

9. The display panel according to claim 1, characterized in that, The first uneven structure includes a recessed portion along a cross-section perpendicular to the substrate, wherein the depth of the recessed portion is greater than or equal to... and less than or equal to 10. The display panel according to any one of claims 1-9, characterized in that, The packaging units are spaced apart on the side of the isolation structure away from the substrate; Preferably, there is a gap between the packaging unit located on the side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate.

11. The display panel according to any one of claims 1-9, characterized in that, The display panel further includes a second encapsulation layer located on the side of the first encapsulation layer away from the substrate; Preferably, the display panel further includes a third encapsulation layer located on the side of the second encapsulation layer away from the substrate; Preferably, the materials of both the first encapsulation layer and the third encapsulation layer include inorganic materials; Preferably, the material of the second encapsulation layer includes an organic material.

12. The display panel according to any one of claims 1-9, characterized in that, The light-emitting unit includes a first electrode, a light-emitting part, and a second electrode that are sequentially stacked along a direction away from the substrate, and the second electrode is electrically connected to the first isolation part. Preferably, the isolation structure further includes a fourth isolation portion located on the side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the fourth isolation portion; Preferably, the material of the fourth isolation portion includes molybdenum; and / or, the material of the first isolation portion includes aluminum; and / or, the material of the second isolation portion includes titanium.

13. A display panel, characterized in that, The display panel includes: substrate; An isolation structure is located on one side of the substrate. The isolation structure encloses and forms an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The roughness of the side of the second isolation portion facing the substrate is greater than the roughness of the side of the first isolation portion away from the substrate. The light-emitting unit is at least partially located within the isolation opening; A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart. The encapsulation units are in contact with at least a portion of the second isolation portion on the side facing the substrate.

14. The display panel according to claim 13, characterized in that, The isolation structure further includes a third isolation portion located between the first isolation portion and the second isolation portion, wherein the roughness of the third isolation portion on the side away from the substrate is equal to the roughness of the second isolation portion on the side facing the substrate; Preferably, the side of the third isolation portion away from the substrate is in contact with the side of the second isolation portion facing the substrate; Preferably, the roughness of the side of the third isolation portion away from the substrate is greater than the roughness of the side of the third isolation portion facing the substrate; Preferably, along the thickness direction of the substrate, the thickness of the third insulating portion is greater than or equal to... and less than or equal to 15. The display panel according to claim 13, characterized in that, The roughness of the second isolation portion on the side facing the substrate is equal to the roughness of the second isolation portion on the side away from the substrate.

16. The display panel according to claim 14, characterized in that, The material of the third isolation section has a columnar crystal structure. Preferably, the material of the third isolation section includes molybdenum.

17. The display panel according to claim 14, characterized in that, The packaging unit extends sequentially from the first isolation portion, the side of the third isolation portion toward the isolation opening, and the side of the second isolation portion toward the substrate to the side of the second isolation portion away from the substrate; Preferably, the orthographic projection of the side of the third isolation portion away from the substrate onto the substrate is located within the orthographic projection of the second isolation portion onto the substrate; Preferably, the orthographic projection of the side of the third isolation portion closer to the substrate on the substrate coincides with the orthographic projection of the side of the first isolation portion farther from the substrate on the substrate.

18. A method for manufacturing a display panel, characterized in that, The method includes: Provide substrate; An isolation structure is formed on one side of the substrate, and the isolation structure encloses an isolation opening. The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the substrate. The orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate. The side of the second isolation portion facing the substrate has a first concave-convex structure. At least a portion of the light-emitting units are formed within the isolation opening, and a first encapsulation layer is formed on the side of the light-emitting units away from the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart, and the encapsulation units are in contact with at least a portion of the first concave-convex structure.

19. The method for manufacturing a display panel according to claim 18, characterized in that, The step of forming an isolation structure on one side of the substrate includes: A pixel defining material layer, a first isolation material layer, a third isolation material layer, and a second isolation material layer are sequentially formed on one side of the substrate. The third isolation material layer has a second concave-convex structure on the side away from the substrate, and the second isolation material layer has a first concave-convex structure that interlocks with the second concave-convex structure on the side facing the substrate. The second isolation material layer, the third isolation material layer, the first isolation material layer, and the pixel defining material layer are sequentially patterned to form the second isolation portion, the third isolation portion, and the first isolation portion of the isolation structure, as well as the pixel defining layer.

20. An electronic device, characterized in that, The electronic device includes a display panel as described in any one of claims 1-17, or a display panel prepared by the method for preparing a display panel as described in claim 18 or 19.

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