Display panel, method for manufacturing display panel, and electronic device

Abstract

The embodiments of the present application provide a display panel, a method for preparing a display panel, and an electronic device, which relate to the field of display technology. The display panel includes a substrate, an isolation structure, and a plurality of light-emitting units. The isolation structure is located on one side of the substrate. The isolation structure encloses and forms a plurality of isolation openings. The isolation structure includes a first isolation portion and a second isolation portion stacked in sequence in a direction away from the substrate. The second isolation portion includes a protrusion. The orthographic projection of the protrusion on the substrate is located outside the orthographic projection of the first isolation portion on the side away from the substrate. In the direction away from the substrate, at least a portion of the side of the protrusion close to the substrate includes a first curved surface protruding from the plane on which the substrate is located. At least a portion of the light-emitting unit is located within the corresponding isolation opening. The present application makes it difficult for the second isolation portion to warp in a direction away from the substrate, thereby reducing the risk of crosstalk between the light-emitting units.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) and flat-panel displays based on technologies such as light-emitting diodes (LEDs) have become a mainstream display panel technology, widely used in a variety of consumer electronics products, including mobile phones, televisions, laptops, and desktop computers, due to their advantages of high image quality, power efficiency, thin design, and wide application range. Traditionally, the production of display panels involves patterning the luminous pixels using a fine metal mask (FMM). While FMM technology is mature and boasts extensive mass production experience, it also suffers from limited precision, high development costs, and long development cycles. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe the non-fine metal mask technology for reference.

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

[0004] In order to overcome the technical problems mentioned in the above technical background, an embodiment of the present application provides a display panel, wherein the display panel includes:

[0005] substrate;

[0006] an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first isolation portion and a second isolation portion sequentially stacked in a direction away from the substrate, the second isolation portion comprising a protrusion, the orthographic projection of the protrusion on the substrate being located outside the orthographic projection of the first isolation portion on the side away from the substrate, and at least a portion of a side of the protrusion close to the substrate in the direction away from the substrate comprising a first curved surface convex from the plane of the substrate;

[0007] A plurality of light emitting units are provided, wherein at least a portion of the light emitting units is located in the corresponding isolation openings.

[0008] In some possible implementations, the second isolation portion further includes a main body portion, and the protrusion and the main body portion are connected to each other along a direction parallel to the substrate;

[0009] Preferably, the orthographic projection of the main body portion on the substrate surrounds the orthographic projection of the protrusion portion on the substrate;

[0010] Preferably, an orthographic projection of a side of the main body portion close to the substrate on the substrate coincides with an orthographic projection of a side of the first isolation portion away from the substrate on the substrate.

[0011] In some possible implementations, in a direction away from the substrate, a side of the protrusion close to the substrate is a first curved surface that is convex based on the plane where the substrate is located;

[0012] Preferably, in a direction away from the substrate, a side of the protrusion away from the substrate comprises a second curved surface convex based on the plane where the substrate is located;

[0013] Preferably, in a direction away from the substrate, a side of the main body portion close to the substrate comprises a third curved surface protruding from the plane where the substrate is located, and the third curved surface is connected to the first curved surface;

[0014] Preferably, in a direction away from the substrate, a side of the main body away from the substrate comprises a fourth curved surface protruding from a plane where the substrate is located, and the fourth curved surface is connected to the second curved surface;

[0015] Preferably, a pattern formed by the orthographic projections of the first curved surface and the third curved surface on the substrate overlaps with a pattern formed by the orthographic projections of the second curved surface and the fourth curved surface on the substrate.

[0016] In some possible embodiments, the display panel further includes a raised layer located between the isolation structure and the substrate, the raised layer including a plurality of raised portions spaced apart from each other, wherein a side of the raised portion away from the substrate includes a fifth curved surface protruding from a plane on which the substrate is located, and an orthographic projection of the fifth curved surface on the substrate overlaps with a pattern formed by orthographic projections of the first curved surface and the third curved surface on the substrate.

[0017] Preferably, the light-emitting unit includes a first electrode, at least a portion of the raised portion is located between the first electrode and the substrate, and in a direction away from the substrate, a side of the first electrode close to the substrate includes a sixth curved surface protruding from a plane on which the substrate is located, and the sixth curved surface is in contact with a portion of the fifth curved surface;

[0018] Preferably, in a direction away from the substrate, a side of the first electrode away from the substrate includes a seventh curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the sixth curved surface on the substrate overlaps with an orthographic projection of the seventh curved surface on the substrate;

[0019] Preferably, the display panel further comprises a pixel defining layer located between the first electrode and the isolation structure, the pixel defining layer defining a plurality of pixel openings, the pixel openings being in communication with the isolation openings, and a side of the pixel defining layer close to the substrate in a direction away from the substrate comprising an eighth curved surface protruding from a plane on which the substrate is located, the eighth curved surface being in contact with the seventh curved surface and a portion of the fifth curved surface;

[0020] Preferably, in a direction away from the substrate, a side of the pixel defining layer away from the substrate includes a ninth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the eighth curved surface on the substrate is located within an orthographic projection of the ninth curved surface on the substrate;

[0021] Preferably, there is a gap between the ninth curved surface and the first curved surface, and the orthographic projection of the first curved surface on the substrate overlaps with the orthographic projection of the ninth curved surface on the substrate;

[0022] Preferably, in a direction away from the substrate, a side of the first isolation portion close to the substrate includes a tenth curved surface protruding from the plane where the substrate is located, and the tenth curved surface is in contact with a portion of the ninth curved surface;

[0023] Preferably, in a direction away from the substrate, a side of the first isolation portion away from the substrate comprises an eleventh curved surface protruding from a plane where the substrate is located, and the eleventh curved surface is in contact with the third curved surface.

[0024] In some possible embodiments, along the thickness direction of the substrate, the display panel further includes a spacer layer and a pixel defining layer stacked sequentially between the substrate and the isolation structure, the pixel defining layer defining a plurality of pixel openings, the pixel openings communicating with the isolation openings, and the spacer layer including a plurality of spaced-apart spaced-apart spacers; in a direction away from the substrate, a side of the spacer portion away from the substrate includes a fifth curved surface protruding from the plane of the substrate, and a side of the pixel defining layer closer to the substrate includes an eighth curved surface protruding from the plane of the substrate, the eighth curved surface being in contact with the fifth curved surface;

[0025] Preferably, in a direction away from the substrate, a side of the pixel defining layer away from the substrate includes a ninth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the eighth curved surface on the substrate is located within an orthographic projection of the ninth curved surface on the substrate;

[0026] Preferably, there is a gap between the ninth curved surface and the first curved surface, and the orthographic projection of the first curved surface on the substrate overlaps with the orthographic projection of the ninth curved surface on the substrate;

[0027] Preferably, in a direction away from the substrate, a side of the first isolation portion close to the substrate includes a tenth curved surface protruding from the plane where the substrate is located, and the tenth curved surface is in contact with a portion of the ninth curved surface;

[0028] Preferably, in a direction away from the substrate, a side of the first isolation portion away from the substrate comprises an eleventh curved surface protruding from a plane where the substrate is located, and the eleventh curved surface is in contact with the third curved surface.

[0029] In some possible embodiments, along the thickness direction of the substrate, the display panel further includes a pixel defining layer and a spacer layer sequentially stacked between the substrate and the isolation structure, the pixel defining layer defining a plurality of pixel openings, the pixel openings communicating with the isolation openings, and the spacer layer including a plurality of spaced-apart spaced-apart elevated portions; in a direction away from the substrate, a side of the elevated portion away from the substrate includes a fifth curved surface protruding from the plane of the substrate, and a side of the first isolation portion closer to the substrate includes a tenth curved surface protruding from the plane of the substrate, the tenth curved surface being in contact with a portion of the fifth curved surface;

[0030] Preferably, there is a gap between the fifth curved surface and the first curved surface, and the orthographic projection of the first curved surface on the substrate overlaps with the orthographic projection of the fifth curved surface on the substrate;

[0031] Preferably, in a direction away from the substrate, a side of the first isolation portion away from the substrate comprises an eleventh curved surface protruding from a plane where the substrate is located, and the eleventh curved surface is in contact with the third curved surface.

[0032] In some possible implementations, a side of the raised portion close to the substrate is a flat surface;

[0033] Preferably, the orthographic projection of the raised portion on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate;

[0034] Preferably, the curvature of the fifth curved surface is greater than or equal to 50° and less than or equal to 70°;

[0035] Preferably, the curvature of the first curved surface is greater than or equal to 50° and less than or equal to 70°.

[0036] In some possible implementations, along the thickness direction of the substrate, the thickness of the raised portion is greater than or equal to 1 μm and less than or equal to 2 μm;

[0037] Preferably, the material of the raised portion includes organic material;

[0038] Preferably, the material of the raised portion includes polyimide.

[0039] In some possible implementations, the display panel further includes an encapsulation unit located on a side of the light-emitting unit away from the substrate, and a portion of the encapsulation unit extends from a side of the isolation structure toward the isolation opening to a side of the isolation structure away from the substrate;

[0040] Preferably, in a direction away from the substrate, a side of the packaging unit located on a side of the isolation structure away from the substrate and close to the substrate includes a fourteenth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the fourteenth curved surface on the substrate is located within an orthographic projection of the first curved surface on the substrate;

[0041] Preferably, in a direction away from the substrate, a side of the packaging unit located on a side of the isolation structure away from the substrate, away from the substrate, includes a fifteenth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the fifteenth curved surface on the substrate overlaps with an orthographic projection of the fourteenth curved surface on the substrate;

[0042] Preferably, there are multiple packaging units, and at least two light-emitting units with different luminous colors correspond to different packaging units;

[0043] Preferably, the packaging unit is spaced apart on a side of the isolation structure away from the substrate;

[0044] Preferably, a gap exists between the packaging unit located on a side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate;

[0045] Preferably, the packaging unit and the isolation structure are attached to each other on a side facing the isolation opening.

[0046] In some possible implementations, the display panel further includes a second encapsulation layer located on a side of the encapsulation unit away from the substrate, and a third encapsulation layer located on a side of the second encapsulation layer away from the substrate;

[0047] Preferably, the materials of the encapsulation unit and the third encapsulation layer both include inorganic materials;

[0048] Preferably, the material of the second encapsulation layer includes organic material.

[0049] In some possible implementations, the light-emitting unit includes a first electrode, a light-emitting functional portion, and a second electrode sequentially stacked along a thickness direction of the substrate, the isolation structure includes a conductive material, and the second electrode is electrically connected to the first isolation portion;

[0050] Preferably, the isolation structure further comprises a third isolation portion located on a side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the third isolation portion;

[0051] Preferably, the orthographic projection of the light-emitting functional portion on the substrate is located outside the orthographic projection of the first isolation portion on the substrate;

[0052] Preferably, the material of the third isolation portion includes molybdenum or titanium; and / or the material of the first isolation portion includes aluminum, silver or copper; and / or the material of the second isolation portion includes titanium or molybdenum.

[0053] In some possible implementations, in a direction away from the substrate, a side of the third isolation portion close to the substrate includes a twelfth curved surface protruding from the plane where the substrate is located, and the twelfth curved surface is in contact with a portion of the ninth curved surface.

[0054] Preferably, in a direction away from the substrate, a side of the third isolation portion away from the substrate comprises a thirteenth curved surface protruding based on the plane where the substrate is located, and the thirteenth curved surface is in contact with a portion of the tenth curved surface.

[0055] In some possible implementations, the present application further provides a method for preparing a display panel, the method comprising:

[0056] providing a substrate;

[0057] An isolation structure is formed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first isolation portion and a second isolation portion sequentially stacked in a direction away from the substrate, the second isolation portion comprising a protrusion, the orthographic projection of the protrusion on the substrate being located outside the orthographic projection of the first isolation portion on the side away from the substrate, and at least a portion of a side of the protrusion close to the substrate in the direction away from the substrate comprising a first curved surface convex from the plane of the substrate;

[0058] At least a portion of the light emitting unit is formed in the corresponding isolation opening.

[0059] In some possible implementations, before the step of forming an isolation structure on one side of the substrate, the method further includes:

[0060] A layer of a raising material is formed on one side of the substrate, and the raising material layer is patterned to form a plurality of raised portions spaced apart from each other, wherein a side of the raising portion away from the substrate includes a fifth curved surface protruding from a plane on which the substrate is located, and an orthographic projection of the first curved surface on the substrate overlaps with an orthographic projection of the fifth curved surface on the substrate;

[0061] The step of forming an isolation structure on one side of the substrate includes:

[0062] An isolation material layer is formed on a side of the raised layer away from the substrate, and a sixteenth arc surface is formed on a side of the isolation material layer close to the substrate at the position of the fifth arc surface, wherein the sixteenth arc surface includes the first arc surface;

[0063] The isolation material layer is patterned to form an isolation structure.

[0064] In some possible implementations, the present application further provides an electronic device, which includes the display panel described in the present application, or includes a display panel prepared by the method for preparing the display panel described in the present application.

[0065] Compared with the prior art, this application has the following beneficial effects:

[0066] The present application provides a display panel, a method for preparing a display panel, and an electronic device. By setting a first curved surface on the side of the protrusion close to the substrate, the impact of the etching liquid on the second isolation part can be reduced, so that the second isolation part is not easily warped in the direction away from the substrate, thereby making it difficult for the light-emitting material layer of the light-emitting unit to overlap with the isolation structure, thereby reducing the risk of crosstalk between the light-emitting units, and ultimately improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0068] Figure 1 A schematic cross-sectional view of a display panel provided in an embodiment of the present application;

[0069] Figure 2aA schematic diagram of a partial top view of a display panel provided in an embodiment of the present application;

[0070] Figure 2b Provided in the embodiments of this application Figure 2a One of the cross-sectional views at AA in the middle;

[0071] Figure 3 Provided in the embodiments of this application Figure 2a The second cross-sectional view at AA in the middle;

[0072] Figure 4 Provided in the embodiments of this application Figure 2a The third cross-sectional view at AA in the middle;

[0073] Figure 5 Provided in the embodiments of this application Figure 2a The fourth cross-sectional view at AA in the middle;

[0074] Figure 6 A display panel provided in an embodiment of the present application includes a schematic cross-sectional view of a packaging unit;

[0075] Figure 7 The display panel provided in the embodiment of the present application includes a second cross-sectional schematic diagram of a packaging unit;

[0076] Figure 8 The third cross-sectional schematic diagram of the display panel provided in the embodiment of the present application includes a packaging unit;

[0077] Figure 9 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present application including a second encapsulation layer and a third encapsulation layer;

[0078] Figure 10 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0079] Figure 11 A schematic cross-sectional view of forming a padding material layer on one side of a substrate according to an embodiment of the present application;

[0080] Figure 12 A schematic cross-sectional view of a patterned layer of a raised material layer according to an embodiment of the present application;

[0081] Figure 13 A schematic cross-sectional view of forming a first electrode layer on one side of a substrate provided in an embodiment of the present application;

[0082] Figure 14 This is a cross-sectional view of sequentially forming a pixel defining layer and an isolation material layer on a side of the padding layer away from the substrate provided in an embodiment of the present application;

[0083] Figure 15This is a cross-sectional view of the isolation material layer and the pixel definition material layer after patterning in sequence according to an embodiment of the present application.

[0084] Reference numerals: 1, substrate; 2, pixel defining layer; 21, pixel opening; 22, eighth curved surface; 23, ninth curved surface; 3, isolation structure; 31, first isolation portion; 311, tenth curved surface; 312, eleventh curved surface; 32, second isolation portion; 321, protrusion; 3211, first curved surface; 3212, second curved surface; 322, main body; 3221, third curved surface; 3222, fourth curved surface; 33, third isolation portion; 331, twelfth curved surface; 332, Thirteenth arc surface; 4. First electrode; 41. Sixth arc surface; 42. Seventh arc surface; 5. Light-emitting functional part; 6. Second electrode; 7. Light-emitting unit; 8. Isolation opening; 9. Raised layer; 91. Raised part; 911. Fifth arc surface; 10. Packaging unit; 101. Fourteenth arc surface; 102. Fifteenth arc surface; 11. Second packaging layer; 12. Third packaging layer; 13. Raised material layer; 14. Pixel defining material layer; 15. Isolation material layer; 151. Sixteenth arc surface. DETAILED DESCRIPTION

[0085] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0086] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0087] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0088] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0089] It should be noted that, in the absence of conflict, different features in the embodiments of the present application can be combined with each other.

[0090] Improving the density of light-emitting units (i.e., pixel density) in display panels is an important way to enhance display quality. However, current display panels manufactured using fine metal mask (FMM) evaporation technology are currently unable to further increase the density of light-emitting units due to technical limitations. The inventors have discovered that, to address this technical issue, isolation structures can be incorporated into some display panels. During the full-layer evaporation 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 structures. Through multiple evaporation and etching processes (i.e., light-emitting unit patterning), light-emitting units of different colors can be formed in different isolation openings.

[0091] The display panel in the related art includes a substrate, an isolation structure located on one side of the substrate, and a light-emitting unit located in an isolation opening formed by the isolation structure. The light-emitting unit includes a light-emitting functional part and a second electrode stacked in sequence. The second electrode is overlapped with the isolation structure to transmit the signal of the second electrode to different light-emitting units.

[0092] However, in the process of forming the display panel in the related art, the isolation structure is easily warped in the direction away from the substrate, thereby causing the light-emitting functional part of the light-emitting unit to overlap with the isolation structure, thereby causing lateral leakage between different light-emitting units, and ultimately affecting the display effect of the display panel.

[0093] In order to solve the above-mentioned technical problems, the inventors have innovatively designed the following technical solutions, and the specific implementation solutions of this application will be described in detail below with reference to the accompanying drawings. It should be noted that the defects existing in the solutions in the above-mentioned prior art are the results obtained by the inventors after practice and careful research. Therefore, the discovery process of the above-mentioned technical problems and the solutions proposed in this embodiment below for the above-mentioned problems should all be the contributions made by the inventors to this application in the process of invention and creation, and should not be understood as technical contents known to those skilled in the art.

[0094] See Figure 1 This embodiment provides a display panel, which includes a substrate 1, an isolation structure 3 and a plurality of light-emitting units 7.

[0095] The substrate 1 may include a substrate and multiple drive units located on one side of the substrate. Each drive unit may include one or more semiconductor switching devices. The semiconductor switching devices may be formed by the cooperation of multiple film layers in the substrate 1. For example, the semiconductor switching devices may be thin film transistors formed by the cooperation of multiple film layers.

[0096] The isolation structure 3 is located on one side of the substrate 1. The isolation structure 3 encloses a plurality of isolation openings 8. The isolation structure 3 includes a first isolation portion 31 and a second isolation portion 32 stacked in sequence in a direction away from the substrate 1. The second isolation portion 32 includes a protrusion 321. The orthographic projection of the protrusion 321 on the substrate 1 is located outside the orthographic projection of the first isolation portion 31 on the side away from the substrate 1 on the substrate 1. In the direction away from the substrate 1, at least a portion of the side of the protrusion 321 close to the substrate 1 includes a first arc surface 3211 protruding based on the plane where the substrate 1 is located.

[0097] At least a portion of the light emitting unit 7 is located in the corresponding isolation opening 8 .

[0098] The area of ​​the orthographic projection of the side of the first isolation portion 31 away from the substrate 1 on the substrate 1 is smaller than the area of ​​the orthographic projection of the second isolation portion 32 on the substrate 1. The second isolation portion 32 extends relative to the first isolation portion 31. At least the portion of the second isolation portion 32 extending relative to the first isolation portion 31 is a protrusion 321. The second isolation portion 32 serves to isolate the material of the light-emitting unit 7.

[0099] In the related art, during the process of forming a display panel, etching liquid (such as the etching liquid used to etch the isolation structure 3, the dry etching gas used to dry-etch the encapsulation unit, and the etching liquid used to etch the material of the light-emitting unit 7) will impact the second isolation portion 32. After being impacted by the etching liquid, the second isolation portion 32 is likely to warp away from the substrate 1. Because the second isolation portion 32 warps away from the substrate 1, the second isolation portion 32 is less effective in isolating the light-emitting material layer of the light-emitting unit 7 when forming the light-emitting material layer. This can easily cause the light-emitting material layer to overlap with the isolation structure 3, resulting in crosstalk between light-emitting units 7 of different luminous colors, ultimately affecting the display effect of the display panel.

[0100] In this embodiment, at least a portion of the protrusion 321 in the suspended portion of the second isolation portion 32 facing the substrate 1 is configured to include a first arc surface 3211 protruding from the plane where the substrate 1 is located. Figure 1 The dotted arrow shown indicates the flow direction of the etching liquid. Since the first curved surface 3211 protrudes in a direction away from the substrate 1 based on the plane where the substrate 1 is located, on the one hand, when the etching liquid reaches the first curved surface 3211 of the protrusion 321, the etching liquid will flow out more smoothly along the first curved surface 3211, thereby greatly reducing the impact of the etching liquid on the second isolation portion 32; on the other hand, the outflowing etching liquid will impact the inflowing etching liquid, thereby further reducing the impact force of the inflowing etching liquid on the second isolation portion 32, thereby making the second isolation portion 32 less likely to warp in a direction away from the substrate 1.

[0101] In this way, when forming the light-emitting material layer of the light-emitting unit 7, the second isolation portion 32 will effectively isolate the light-emitting material layer and make it difficult for the light-emitting material layer to overlap with the isolation structure 3, thereby making it difficult for crosstalk to occur between the light-emitting units 7, thereby improving the display effect of the display panel.

[0102] Based on the above design, this embodiment sets a first curved surface 3211 on the side of the protrusion 321 close to the substrate 1, which can reduce the impact of the etching liquid on the second isolation portion 32, so that the second isolation portion 32 is not easily warped in the direction away from the substrate 1, thereby making it difficult for the light-emitting material layer of the light-emitting unit 7 to overlap with the isolation structure 3, thereby reducing the risk of crosstalk between the light-emitting units 7, and ultimately improving the display effect of the display panel.

[0103] For some possible implementations, see Figure 2a-2b The display panel also includes a pixel defining layer 2 located between the first electrode 4 and the isolation structure 3. The pixel defining layer 2 defines a plurality of pixel openings 21. The pixel openings 21 are connected to the isolation openings 8. The orthographic projection of the pixel openings 21 on the substrate 1 is located within the orthographic projection of the isolation openings 8 on the substrate 1.

[0104] Optionally, the light-emitting unit 7 includes a first electrode 4, a light-emitting functional part 5 and a second electrode 6 stacked in sequence along the thickness direction of the substrate 1, the isolation structure 3 includes a conductive material, the second electrode 6 is electrically connected to the first isolation part 31, and the pixel opening 21 exposes part of the first electrode 4.

[0105] The provision of the isolation structure 3 enables the display panel to form film layers of light-emitting units 7 of different colors in different isolation openings 8 without the need for a fine mask. Specifically, because the second isolation portion 32 is located on the side of the first isolation portion 31 away from the substrate 1, and the lateral width of the second isolation portion 32 is greater than the lateral width of the first isolation portion 31, when forming the light-emitting material layer, the light-emitting material layer is separated by the isolation structure 3 to form a plurality of spaced light-emitting functional portions 5. When forming the second electrode material layer, the second electrode material layer is separated by the isolation structure 3 to form a plurality of spaced second electrodes 6. The isolation structure 3 includes a conductive material, and the second electrode 6 is electrically connected to the isolation structure 3. One first electrode 4, one light-emitting functional 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.

[0106] 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 the light-emitting unit 7 of each color in the display panel can be first prepared on the entire surface and then patterned, thereby eliminating the need for a fine mask and further reducing the production cost of the display panel.

[0107] For some possible implementations, see Figure 2a-2b The second isolation portion 32 further includes a main body portion 322 , and the protrusion 321 and the main body portion 322 are connected to each other along a direction parallel to the substrate 1 .

[0108] Optionally, the orthographic projection of the main body portion 322 on the substrate 1 surrounds the orthographic projection of the protrusion 321 on the substrate 1 .

[0109] Optionally, the orthographic projection of a side of the main body portion 322 close to the substrate 1 on the substrate 1 coincides with the orthographic projection of a side of the first isolation portion 31 away from the substrate 1 on the substrate 1 .

[0110] The portion of the second isolation portion 32 extending relative to the first isolation portion 31 is a protrusion 321, and the portion of the second isolation portion 32 overlapping with the first isolation portion 31 on a side away from the substrate 1 is a main body portion 322. A first arc surface 3211 is provided on the side of the main body portion 322 close to the substrate 1, which can reduce the impact of the etching liquid on the second isolation portion 32.

[0111] For some possible implementations, see again Figure 2b In the direction away from the substrate 1 , the side of the protrusion 321 close to the substrate 1 is a first arc surface 3211 that is convex based on the plane where the substrate 1 is located.

[0112] In this embodiment, by completely setting the side of the protrusion 321 close to the substrate 1 as the first curved surface 3211, the etching liquid can have a smaller impact on the second isolation portion 32, making the second isolation portion 32 less likely to warp toward the side away from the substrate 1.

[0113] Preferably, see again Figure 2b In the direction away from the substrate 1 , the side of the protrusion 321 away from the substrate 1 includes a second arc surface 3212 protruding based on the plane where the substrate 1 is located, that is, the second arc surface 3212 protrudes in the direction away from the substrate 1 .

[0114] Optionally, in a direction away from the substrate 1 , a side of the main body 322 close to the substrate 1 includes a third curved surface 3221 protruding from the plane where the substrate 1 is located, and the third curved surface 3221 is connected to the first curved surface 3211 .

[0115] Optionally, in a direction away from the substrate 1 , a side of the main body 322 away from the substrate 1 includes a fourth curved surface 3222 protruding from the plane where the substrate 1 is located, and the fourth curved surface 3222 is connected to the second curved surface 3212 .

[0116] Optionally, a pattern formed by the orthographic projections of the first curved surface 3211 and the third curved surface 3221 on the substrate 1 overlaps with a pattern formed by the orthographic projections of the second curved surface 3212 and the fourth curved surface 3222 on the substrate 1 .

[0117] In this embodiment, a second curved surface 3212 is provided at a position corresponding to the first curved surface 3211 on a side of the protrusion 321 away from the substrate 1, a third curved surface 3221 connected to the first curved surface 3211 is provided on a side of the main body 322 close to the substrate 1, and a fourth curved surface 3222 is provided at a position corresponding to the third curved surface 3221 on a side of the main body 322 away from the substrate 1, and the fourth curved surface 3222 is connected to the second curved surface 3212. In this way, the side of the second isolation portion 32 close to the substrate 1 and the side away from the substrate 1 are both provided to include curved surfaces, which can further reduce the impact of the etching liquid on the second isolation portion 32.

[0118] For some possible implementations, see Figure 3The display panel also includes a raising layer 9 located between the isolation structure 3 and the substrate 1. The raising layer 9 includes a plurality of raising portions 91 arranged at intervals. In the direction away from the substrate 1, the side of the raising portion 91 away from the substrate 1 includes a fifth curved surface 911 protruding based on the plane where the substrate 1 is located. The orthographic projection of the fifth curved surface 911 on the substrate 1 overlaps with the pattern composed of the orthographic projections of the first curved surface 3211 and the third curved surface 3221 on the substrate 1.

[0119] Optionally, the material of the raised portion 91 includes an organic material.

[0120] Optionally, the material of the raised portion 91 includes polyimide.

[0121] In this embodiment, a raised portion 91 is provided on a side of the isolation structure 3 close to the substrate 1. In a direction away from the substrate 1, the side of the raised portion 91 away from the substrate 1 includes a fifth curved surface 911 protruding from the plane on which the substrate 1 is located. According to the deposition relationship of the film layers, when the isolation material layer 15 is formed, a curved surface including a first curved surface 3211 and a third curved surface 3221 corresponding to the fifth curved surface 911 is formed on the side of the isolation material layer 15 close to the substrate 1. A curved surface including a second curved surface 3212 and a fourth curved surface 3222 corresponding to the first curved surface 3211 and the third curved surface 3221, respectively, is formed on the side of the isolation material layer 15 away from the substrate 1. After the isolation structure 3 is formed, the first curved surface 3211, the second curved surface 3212, the third curved surface 3221, and the fourth curved surface 3222 are naturally formed at the position corresponding to the second isolation portion 32. In this way, there is no need to set up a special process to form the first curved surface 3211, thereby reducing the process cost of forming the first curved surface 3211.

[0122] Several solutions are given below in which the elevation layer 9 is located at different positions on the display panel.

[0123] In some embodiments, at least a portion of the raised portion 91 is located between the first electrode 4 and the substrate 1. In the direction away from the substrate 1, the side of the first electrode 4 close to the substrate 1 includes a sixth arc surface 41 protruding based on the plane where the substrate 1 is located, and the sixth arc surface 41 is in contact with a portion of the fifth arc surface 911.

[0124] Optionally, in the direction away from the substrate 1, the side of the first electrode 4 away from the substrate 1 includes a seventh curved surface 42 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the sixth curved surface 41 on the substrate 1 overlaps with the orthographic projection of the seventh curved surface 42 on the substrate 1.

[0125] Optionally, in the direction away from the substrate 1 , the side of the pixel defining layer 2 close to the substrate 1 includes an eighth curved surface 22 protruding based on the plane where the substrate 1 is located, and the eighth curved surface 22 is in contact with the seventh curved surface 42 and part of the fifth curved surface 911 .

[0126] Optionally, in the direction away from the substrate 1, the side of the pixel defining layer 2 away from the substrate 1 includes a ninth curved surface 23 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the eighth curved surface 22 on the substrate 1 is located within the orthographic projection of the ninth curved surface 23 on the substrate 1.

[0127] Optionally, there is a gap between the ninth curved surface 23 and the first curved surface 3211 , and the orthographic projection of the first curved surface 3211 on the substrate 1 overlaps with the orthographic projection of the ninth curved surface 23 on the substrate 1 .

[0128] Optionally, in the direction away from the substrate 1 , the side of the first isolation portion 31 close to the substrate 1 includes a tenth curved surface 311 protruding from the plane where the substrate 1 is located, and the tenth curved surface 311 is in contact with a portion of the ninth curved surface 23 .

[0129] Optionally, in the direction away from the substrate 1 , the side of the first isolation portion 31 away from the substrate 1 includes an eleventh curved surface 312 protruding from the plane where the substrate 1 is located, and the eleventh curved surface 312 is in contact with the third curved surface 3221 .

[0130] In this embodiment, the raised portion 91 is arranged on the side of the first electrode 4 close to the substrate 1. According to the deposition relationship of the film layer, after the first electrode 4 is formed, the part of the first electrode 4 close to the substrate 1 and in contact with the raised portion 91 will naturally form a sixth arc surface 41, and the side of the first electrode 4 away from the substrate 1 will naturally form a seventh arc surface 42 corresponding to the sixth arc surface 41.

[0131] After the pixel defining layer 2 is formed, the portion of the pixel defining layer 2 that contacts the raised portion 91 and the seventh curved surface 42 will naturally form an eighth curved surface 22, and the side of the pixel defining layer 2 away from the substrate 1 will naturally form a ninth curved surface 23 corresponding to the eighth curved surface 22; after the first isolation portion 31 is formed, the portion of the first isolation portion 31 that contacts the ninth curved surface 23 on the side close to the substrate 1 will naturally form a tenth curved surface 311, and the side of the first isolation portion 31 that contacts the tenth curved surface 311 will naturally form an eleventh curved surface 312 corresponding to the tenth curved surface 311, the portion of the second isolation portion 32 that contacts the eleventh curved surface 312 will naturally form a third curved surface 3221, and the side of the second isolation portion 32 that contacts the substrate 1 will naturally form a fourth curved surface 3222 corresponding to the third curved surface 3221.

[0132] The above arc surface is naturally formed by the fifth arc surface 911 on the side of the raised portion 91 away from the substrate 1. The first arc surface 3211 on the side of the protrusion 321 facing the substrate 1 can effectively reduce the impact force of the etching liquid on the protrusion 321, making it difficult for the suspended protrusion 321 to warp in the direction away from the substrate 1.

[0133] In other embodiments, see Figure 4The raising layer 9 is located on the side of the pixel defining layer 2 close to the substrate 1. In the direction away from the substrate 1, the side of the pixel defining layer 2 close to the substrate 1 includes an eighth curved surface 22 protruding based on the plane where the substrate 1 is located, and the eighth curved surface 22 is in contact with the fifth curved surface 911.

[0134] Optionally, in the direction away from the substrate 1, the side of the pixel defining layer 2 away from the substrate 1 includes a ninth curved surface 23 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the eighth curved surface 22 on the substrate 1 is located within the orthographic projection of the ninth curved surface 23 on the substrate 1.

[0135] Optionally, there is a gap between the ninth curved surface 23 and the first curved surface 3211 , and the orthographic projection of the first curved surface 3211 on the substrate 1 overlaps with the orthographic projection of the ninth curved surface 23 on the substrate 1 .

[0136] Optionally, in the direction away from the substrate 1 , the side of the first isolation portion 31 close to the substrate 1 includes a tenth curved surface 311 protruding from the plane where the substrate 1 is located, and the tenth curved surface 311 is in contact with a portion of the ninth curved surface 23 .

[0137] Optionally, in the direction away from the substrate 1 , the side of the first isolation portion 31 away from the substrate 1 includes an eleventh curved surface 312 protruding from the plane where the substrate 1 is located, and the eleventh curved surface 312 is in contact with the third curved surface 3221 .

[0138] In this embodiment, the raised portion 91 is arranged between the first electrode 4 and the pixel defining layer 2. According to the deposition relationship of the film layer, after the pixel defining layer 2 is formed, the part of the pixel defining layer 2 in contact with the raised portion 91 will naturally form an eighth arc surface 22, and the side of the pixel defining layer 2 away from the substrate 1 will naturally form a ninth arc surface 23 corresponding to the eighth arc surface 22; after the first isolation portion 31 is formed, the part of the first isolation portion 31 close to the substrate 1 in contact with the ninth arc surface 23 will naturally form a tenth arc surface 311, and the side of the first isolation portion 31 away from the substrate 1 will naturally form an eleventh arc surface 312 corresponding to the tenth arc surface 311, the part of the second isolation portion 32 in contact with the eleventh arc surface 312 will naturally form a third arc surface 3221, and the side of the second isolation portion 32 away from the substrate 1 will naturally form a fourth arc surface 3222 corresponding to the third arc surface 3221.

[0139] The above arc surface is naturally formed by the fifth arc surface 911 on the side of the raised portion 91 away from the substrate 1. The first arc surface 3211 on the side of the protrusion 321 facing the substrate 1 can effectively reduce the impact force of the etching liquid on the protrusion 321, making it difficult for the suspended protrusion 321 to warp in the direction away from the substrate 1.

[0140] In some other embodiments, see Figure 5The raised portion 91 is arranged between the pixel defining layer 2 and the first isolation portion 31. In the direction away from the substrate 1, the side of the first isolation portion 31 close to the substrate 1 includes a tenth arc surface 311 protruding based on the plane where the substrate 1 is located, and the tenth arc surface 311 is in contact with a portion of the fifth arc surface 911.

[0141] Optionally, there is a gap between the fifth curved surface 911 and the first curved surface 3211 , and the orthographic projection of the first curved surface 3211 on the substrate 1 overlaps with the orthographic projection of the fifth curved surface 911 on the substrate 1 .

[0142] Optionally, in the direction away from the substrate 1 , the side of the first isolation portion 31 away from the substrate 1 includes an eleventh curved surface 312 protruding from the plane where the substrate 1 is located, and the eleventh curved surface 312 is in contact with the third curved surface 3221 .

[0143] In this embodiment, the raised portion 91 is arranged between the pixel defining layer 2 and the first isolation portion 31. According to the deposition relationship of the film layer, after the first isolation portion 31 is formed, the part of the first isolation portion 31 in contact with the raised portion 91 will naturally form a tenth arc surface 311, and the side of the first isolation portion 31 away from the substrate 1 will naturally form an eleventh arc surface 312 corresponding to the tenth arc surface 311. The part of the second isolation portion 32 in contact with the eleventh arc surface 312 will naturally form a third arc surface 3221, and the side of the second isolation portion 32 away from the substrate 1 will naturally form a fourth arc surface 3222 corresponding to the third arc surface 3221.

[0144] The above arc surface is naturally formed by the fifth arc surface 911 on the side of the raised portion 91 away from the substrate 1. The first arc surface 3211 on the side of the protrusion 321 facing the substrate 1 can effectively reduce the impact force of the etching liquid on the protrusion 321, making it difficult for the suspended protrusion 321 to warp in the direction away from the substrate 1.

[0145] For some possible implementations, see again Figure 5 The side of the raised portion 91 close to the substrate 1 is a flat surface.

[0146] In this embodiment, the side of the raised portion 91 close to the substrate 1 is set to be a flat surface, which can improve the stability of the raised portion 91 and thus improve the reliability of the display panel.

[0147] Optionally, the orthographic projection of the raised portion 91 on the substrate 1 is outside the orthographic projection of the side of the pixel opening 21 close to the substrate 1 on the substrate 1. In this way, the provision of the raised portion 91 will not affect the normal display of the light-emitting unit 7.

[0148] Preferably, the curvature of the fifth curved surface 911 is greater than or equal to 50° and less than or equal to 70°. For example, the curvature of the fifth curved surface 911 can be 50°, 52°, 55°, 60°, 65°, 68°, or 70°.

[0149] Optionally, the curvature of the first curved surface 3211 is greater than or equal to 50° and less than or equal to 70°. For example, the curvature of the first curved surface 3211 can be 50°, 52°, 55°, 60°, 65°, 68°, or 70°.

[0150] In this embodiment, by properly setting the curvature of the fifth curved surface 911 , the curvature of the first curved surface 3211 can be made more appropriate, thereby further reducing the impact force of the etching solution on the protrusion 321 .

[0151] For some possible implementations, see again Figure 5 Along the thickness direction Z of the substrate 1 , the thickness H of the raised portion 91 is greater than or equal to 1 μm and less than or equal to 2 μm. For example, the thickness H can be 1.1 μm, 1.3 μm, 1.5 μm, 1.7 μm, 1.9 μm, or 2 μm. Properly setting the thickness H can form a first curved surface 3211 that is more effective in reducing the impact force of the etching solution.

[0152] For some possible implementations, see Figure 6-Figure 8 The display panel further includes an encapsulation unit 10 located on a side of the light emitting unit 7 away from the substrate 1 . Part of the encapsulation unit 10 extends from the side of the isolation structure 3 toward the isolation opening 8 to the side of the isolation structure 3 away from the substrate 1 .

[0153] Optionally, there are multiple encapsulation units 10 , and at least two light-emitting units 7 with different luminous colors correspond to different encapsulation units 10 .

[0154] Optionally, the packaging units 10 are spaced apart on a side of the isolation structure 3 away from the substrate 1 .

[0155] Optionally, a gap exists between the packaging unit 10 located 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 .

[0156] During the patterning process of the light-emitting unit 7 , the first packaging material layer is disconnected at the isolation structure 3 to form the packaging unit 10 . The packaging unit 10 can completely and independently package the corresponding light-emitting unit 7 , thereby improving the display characteristics of the display panel.

[0157] Preferably, the packaging unit 10 and a side of the isolation structure 3 facing the isolation opening 8 are in contact with each other.

[0158] In the related art, since the second isolation portion 32 is easily warped in a direction away from the substrate 1 , a gap is easily generated between the packaging unit 10 and the isolation structure 3 , thereby greatly reducing the packaging effect of the packaging unit 10 on the corresponding light-emitting unit 7 .

[0159] In this embodiment, since the above solution can prevent the second isolation portion 32 from warping toward the side away from the substrate 1, a gap is unlikely to be generated between the packaging unit 10 and the isolation structure 3, and the packaging unit 10 can more effectively package the corresponding light-emitting unit 7.

[0160] Preferably, in the direction away from the substrate 1, the side of the packaging unit 10 located on the side of the isolation structure 3 away from the substrate 1 close to the substrate 1 includes a fourteenth arc surface 101 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the fourteenth arc surface 101 on the substrate 1 is located within the orthographic projection of the first arc surface 3211 on the substrate 1.

[0161] Optionally, in the direction away from the substrate 1, the side of the packaging unit 10 located on the side of the isolation structure 3 away from the substrate 1 includes a fifteenth arc surface 102 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the fifteenth arc surface 102 on the substrate 1 overlaps with the orthographic projection of the fourteenth arc surface 101 on the substrate 1.

[0162] According to the deposition relationship of the film layers, a fourteenth arc surface 101 will be formed at a position corresponding to the second arc surface 3212 on the side of the packaging unit 10 close to the substrate 1, and a fifteenth arc surface 102 will be formed at a position corresponding to the fourteenth arc surface 101 on the side of the packaging unit 10 away from the substrate 1.

[0163] For some possible implementations, see Figure 9 The display panel further includes a second encapsulation layer 11 located on a side of the encapsulation unit 10 away from the substrate 1 and a third encapsulation layer 12 located on a side of the second encapsulation layer 11 away from the substrate 1 .

[0164] Preferably, the materials of the encapsulation unit 10 and the third encapsulation layer 12 both include inorganic materials, and the material of the second encapsulation layer 11 includes organic materials.

[0165] For example, the encapsulation unit 10 and the third encapsulation layer 12 can be formed by chemical vapor deposition (CVD), and the second encapsulation layer 11 can be formed by inkjet printing (IJP). The second encapsulation layer 11 and the third encapsulation layer 12 can provide a better encapsulation effect on the light-emitting unit 7, thereby further improving the encapsulation quality of the display panel.

[0166] For some possible implementations, see again Figure 9 The isolation structure 3 further includes a third isolation portion 33 located on a side of the first isolation portion 31 facing the substrate 1 , and the second electrode 6 is electrically connected to the third isolation portion 33 .

[0167] Optionally, the material of the third isolation portion 33 includes molybdenum or titanium; and / or the material of the first isolation portion 31 includes aluminum, silver or copper; and / or the material of the second isolation portion 32 includes titanium or molybdenum.

[0168] The third isolation portion 33 includes a conductive material. The second electrode 6 corresponding to the light emitting unit 7 extends to contact the sidewall of the third isolation portion 33 to achieve electrical connection between the second electrode 6 corresponding to the light emitting unit 7 and the third isolation portion 33 .

[0169] Specifically, the third isolation portion 33 is made of molybdenum or titanium; and / or the first isolation portion 31 is made of aluminum, silver, or copper; and / or the second isolation portion 32 is made of titanium or molybdenum. Thus, when the isolation structure 3 separates the second electrode material layer into the second electrode 6, the second electrode 6 is more easily electrically connected to the third isolation portion 33.

[0170] The orthographic projection of the light-emitting functional part 5 on the substrate 1 is outside the orthographic projection of the third isolation part 33 on the substrate 1. In this way, the light-emitting functional part 5 does not overlap with the isolation structure 3, thereby effectively improving the crosstalk problem between the light-emitting units 7.

[0171] For some possible implementations, see again Figure 9 In the direction away from the substrate 1 , the side of the third isolation portion 33 close to the substrate 1 includes a twelfth arc surface 331 protruding based on the plane where the substrate 1 is located, and the twelfth arc surface 331 is in contact with a portion of the ninth arc surface 23 .

[0172] Preferably, in the direction away from the substrate 1 , the side of the third isolation portion 33 away from the substrate 1 includes a thirteenth arc surface 332 protruding from the plane where the substrate 1 is located, and the thirteenth arc surface 332 is in contact with a portion of the tenth arc surface 311 .

[0173] According to the deposition relationship of the film layers, the portion of the third isolation portion 33 in contact with the ninth arc surface 23 of the pixel defining layer 2 will naturally form a twelfth arc surface 331, the portion of the third isolation portion 33 on the side away from the substrate 1 corresponding to the twelfth arc surface 331 will form a thirteenth arc surface 332, and the portion of the first isolation portion 31 in contact with the thirteenth arc surface 332 will naturally form a tenth arc surface 311.

[0174] For some possible implementations, see Figure 1 and Figure 10 , the present application also provides a method for preparing a display panel, the method comprising:

[0175] S10: providing a substrate 1.

[0176] S11: An isolation structure 3 is formed on one side of the substrate 1. The isolation structure 3 encloses a plurality of isolation openings 8. The isolation structure 3 includes a first isolation portion 31 and a second isolation portion 32 which are stacked in sequence in a direction away from the substrate 1. The second isolation portion 32 includes a protrusion 321. The orthographic projection of the protrusion 321 on the substrate 1 is outside the orthographic projection of the first isolation portion 31 on the side away from the substrate 1. In the direction away from the substrate 1, at least a portion of the side of the protrusion 321 close to the substrate 1 includes a first arc surface 3211 protruding based on the plane where the substrate 1 is located.

[0177] S12 : forming at least a portion of the light emitting unit 7 in the corresponding isolation opening 8 .

[0178] In the display panel formed by the above method, at least a portion of the protrusion 321 in the suspended portion of the second isolation portion 32 facing the substrate 1 is configured to include a first curved surface 3211 protruding from the plane where the substrate 1 is located. Figure 1 The dotted arrow shown indicates the flow direction of the etching liquid. Since the first curved surface 3211 protrudes in a direction away from the substrate 1 based on the plane where the substrate 1 is located, on the one hand, when the etching liquid reaches the first curved surface 3211 of the protrusion 321, the etching liquid will flow out more smoothly along the first curved surface 3211, thereby greatly reducing the impact of the etching liquid on the second isolation portion 32; on the other hand, the outflowing etching liquid will impact the inflowing etching liquid, thereby further reducing the impact force of the inflowing etching liquid on the second isolation portion 32, thereby making the second isolation portion 32 less likely to warp in a direction away from the substrate 1.

[0179] In some possible implementations, before the step of forming the isolation structure 3 on one side of the substrate 1 , the method further includes:

[0180] See Figure 11 and Figure 12 A raising material layer 13 is formed on one side of the substrate 1, and the raising material layer 13 is patterned to form a plurality of raised portions 91 arranged at intervals. In the direction away from the substrate 1, the side of the raising portion 91 away from the substrate 1 includes a fifth curved surface 911 protruding based on the plane where the substrate 1 is located, and the orthographic projection of the first curved surface 3211 on the substrate 1 overlaps with the orthographic projection of the fifth curved surface 911 on the substrate 1.

[0181] See Figure 13 A first electrode layer is formed on one side of the substrate 1 , and the first electrode layer includes a plurality of first electrodes 4 arranged at intervals. The first electrodes 4 extend to a portion of the fifth arc surface 911 , and an arc surface is naturally formed on the first electrodes 4 in contact with the fifth arc surface 911 .

[0182] See Figure 14A pixel defining layer 2 and an isolation material layer 15 are sequentially formed on the side of the raising layer 9 away from the substrate 1 , and a sixteenth arc surface 151 is formed at the position of the fifth arc surface 911 on the side of the isolation material layer 15 close to the substrate 1 . The sixteenth arc surface 151 includes the first arc surface 3211 .

[0183] A curved surface is naturally formed at a position of the pixel defining layer 2 corresponding to the fifth curved surface 911 , and a sixteenth curved surface 151 is naturally formed at a position of the isolation material layer 15 close to the substrate 1 corresponding to the fifth curved surface 911 .

[0184] See Figure 15 , the isolation material layer 15 and the pixel definition material layer 14 are patterned in sequence to form an isolation structure 3 and a pixel definition layer 2 respectively.

[0185] After patterning the isolation material layer 15, part of the sixteenth curved surface 151 is removed, and the remaining part of the sixteenth curved surface 151 includes the first curved surface 3211 on the side where the protrusion 321 faces the substrate 1. In this way, the first curved surface 3211 can be formed more conveniently and at a lower cost through the above method.

[0186] Please see again Figure 6 A light emitting unit 7 and a packaging unit 10 located on a side of the light emitting unit 7 away from the substrate 1 are sequentially formed in the isolation opening 8 .

[0187] The above method can also be used to arrange the padding layer 9 between the first electrode 4 and the pixel defining layer 2. The display panel finally formed is as follows: Figure 7 As shown; the padding layer 9 can also be set between the isolation structure 3 and the pixel definition layer 2, and the display panel finally formed is as shown Figure 8 As shown, the principle of forming the first arc surface 3211 is the same as that of the above embodiment, and will not be repeated again.

[0188] In some possible implementations, the present application further provides an electronic device, comprising the display panel of the present application, or comprising a display panel produced by the method for producing a display panel of the present application. The electronic device may include a device with image processing capabilities, such as a server, a personal computer, a laptop computer, a mobile phone, a tablet computer, a wearable device, an in-vehicle display device, etc. Because the electronic device includes the display panel of the present application, the display effect of the electronic device is improved.

[0189] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0190] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: The display panel includes: substrate; an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first isolation portion and a second isolation portion sequentially stacked in a direction away from the substrate, the second isolation portion comprising a protrusion, the orthographic projection of the protrusion on the substrate being located outside the orthographic projection of the first isolation portion on the side away from the substrate, and at least a portion of a side of the protrusion close to the substrate in the direction away from the substrate comprising a first curved surface convex from the plane of the substrate; a plurality of light-emitting units, at least parts of the light-emitting units being located in corresponding isolation openings; Along the thickness direction of the substrate, the display panel also includes a raising layer and a pixel defining layer stacked in sequence between the substrate and the isolation structure, the pixel defining layer defines a plurality of pixel openings, the pixel openings are connected to the isolation openings, and the raising layer includes a plurality of raised portions arranged at intervals; in the direction away from the substrate, the side of the raised portion away from the substrate includes a fifth curved surface protruding based on the plane where the substrate is located, and the side of the pixel defining layer close to the substrate includes an eighth curved surface protruding based on the plane where the substrate is located, and the eighth curved surface is in contact with the fifth curved surface.

2. The display panel according to claim 1, wherein: The second isolation portion further includes a main body portion, and the protrusion and the main body portion are connected to each other along a direction parallel to the substrate; The orthographic projection of the main body on the substrate surrounds the orthographic projection of the protrusion on the substrate; The orthographic projection of a side of the main body portion close to the substrate on the substrate coincides with the orthographic projection of a side of the first isolation portion away from the substrate on the substrate.

3. The display panel according to claim 2, wherein: In a direction away from the substrate, a side of the protrusion close to the substrate is a first arc surface convex based on the plane where the substrate is located; In a direction away from the substrate, a side of the protrusion away from the substrate includes a second curved surface that is convex based on the plane where the substrate is located; In a direction away from the substrate, a side of the main body close to the substrate includes a third curved surface protruding based on a plane where the substrate is located, and the third curved surface is connected to the first curved surface.

4. The display panel according to claim 3, wherein: In a direction away from the substrate, a side of the main body away from the substrate includes a fourth curved surface protruding from a plane where the substrate is located, and the fourth curved surface is connected to the second curved surface; A pattern formed by orthographic projections of the first curved surface and the third curved surface on the substrate overlaps with a pattern formed by orthographic projections of the second curved surface and the fourth curved surface on the substrate.

5. The display panel according to claim 3, wherein: The orthographic projection of the fifth curved surface on the substrate overlaps with a pattern formed by the orthographic projections of the first curved surface and the third curved surface on the substrate.

6. The display panel according to claim 5, wherein: The light-emitting unit includes a first electrode, at least a portion of the raised portion is located between the first electrode and the substrate, and in a direction away from the substrate, a side of the first electrode close to the substrate includes a sixth curved surface protruding from a plane on which the substrate is located, and the sixth curved surface is in contact with a portion of the fifth curved surface; In the direction away from the substrate, the side of the first electrode away from the substrate includes a seventh curved surface protruding based on the plane where the substrate is located, and the orthographic projection of the sixth curved surface on the substrate overlaps with the orthographic projection of the seventh curved surface on the substrate.

7. The display panel according to claim 6, wherein: The eighth arc surface is in contact with the seventh arc surface and a portion of the fifth arc surface; In a direction away from the substrate, a side of the pixel defining layer away from the substrate includes a ninth curved surface that is convex based on the plane on which the substrate is located, and an orthographic projection of the eighth curved surface on the substrate is located within an orthographic projection of the ninth curved surface on the substrate; There is a gap between the ninth curved surface and the first curved surface, and the orthographic projection of the first curved surface on the substrate overlaps with the orthographic projection of the ninth curved surface on the substrate; In a direction away from the substrate, a side of the first isolation portion close to the substrate includes a tenth curved surface protruding from the plane where the substrate is located, and the tenth curved surface is in contact with a portion of the ninth curved surface; In a direction away from the substrate, a side of the first isolation portion away from the substrate includes an eleventh curved surface protruding based on a plane where the substrate is located, and the eleventh curved surface is in contact with the third curved surface.

8. The display panel according to claim 3, wherein: In a direction away from the substrate, a side of the pixel defining layer away from the substrate includes a ninth curved surface that is convex based on the plane on which the substrate is located, and an orthographic projection of the eighth curved surface on the substrate is located within an orthographic projection of the ninth curved surface on the substrate; There is a gap between the ninth curved surface and the first curved surface, and the orthographic projection of the first curved surface on the substrate overlaps with the orthographic projection of the ninth curved surface on the substrate; In a direction away from the substrate, a side of the first isolation portion close to the substrate includes a tenth curved surface protruding from the plane where the substrate is located, and the tenth curved surface is in contact with a portion of the ninth curved surface; In a direction away from the substrate, a side of the first isolation portion away from the substrate includes an eleventh curved surface protruding based on a plane where the substrate is located, and the eleventh curved surface is in contact with the third curved surface.

9. The display panel according to claim 1, wherein: The side of the raised portion close to the substrate is a flat surface; The orthographic projection of the raised portion on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate; The curvature of the fifth curved surface is greater than or equal to 50° and less than or equal to 70°, and the curvature of the first curved surface is greater than or equal to 50° and less than or equal to 70°.

10. The display panel according to any one of claims 1 to 9, wherein: Along the thickness direction of the substrate, the thickness of the raised portion is greater than or equal to 1 μm and less than or equal to 2 μm; The material of the raised portion includes an organic material, and the material of the raised portion includes polyimide.

11. The display panel according to any one of claims 1 to 9, wherein: The display panel further includes an encapsulation unit located on a side of the light-emitting unit away from the substrate, wherein a portion of the encapsulation unit extends from a side of the isolation structure toward the isolation opening to a side of the isolation structure away from the substrate; In a direction away from the substrate, a side of the packaging unit located on a side of the isolation structure away from the substrate and close to the substrate includes a fourteenth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the fourteenth curved surface on the substrate is located within an orthographic projection of the first curved surface on the substrate; In a direction away from the substrate, a side of the packaging unit located on a side of the isolation structure away from the substrate, away from the substrate, includes a fifteenth curved surface protruding from the plane on which the substrate is located, and an orthographic projection of the fifteenth curved surface on the substrate overlaps with an orthographic projection of the fourteenth curved surface on the substrate; There are multiple packaging units, and at least two light-emitting units with different luminous colors correspond to different packaging units; The packaging unit is spaced apart and arranged on a side of the isolation structure away from the substrate; A gap is formed between the packaging unit located on a side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate; The packaging unit and the isolation structure are attached to each other at a side facing the isolation opening.

12. The display panel according to claim 11, wherein: The display panel further includes a second encapsulation layer located on a side of the encapsulation unit away from the substrate, and a third encapsulation layer located on a side of the second encapsulation layer away from the substrate; The materials of the encapsulation unit and the third encapsulation layer both include inorganic materials; The material of the second encapsulation layer includes organic material.

13. The display panel according to claim 7 or 8, characterized in that: The light-emitting unit includes a first electrode, a light-emitting functional portion, and a second electrode sequentially stacked along the thickness direction of the substrate, the isolation structure includes a conductive material, and the second electrode is electrically connected to the first isolation portion; The isolation structure further includes a third isolation portion located on a side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the third isolation portion; The orthographic projection of the light-emitting functional portion on the substrate is located outside the orthographic projection of the first isolation portion on the substrate; The material of the third isolation portion includes molybdenum or titanium; and / or the material of the first isolation portion includes aluminum, silver or copper; and / or the material of the second isolation portion includes titanium or molybdenum.

14. The display panel according to claim 13, wherein: In a direction away from the substrate, a side of the third isolation portion close to the substrate includes a twelfth curved surface protruding from the plane where the substrate is located, and the twelfth curved surface is in contact with a portion of the ninth curved surface; In a direction away from the substrate, a side of the third isolation portion away from the substrate includes a thirteenth curved surface protruding based on the plane where the substrate is located, and the thirteenth curved surface is in contact with a portion of the tenth curved surface.

15. A method for preparing a display panel, characterized in that: The method comprises: providing a substrate; A raising layer is formed on one side of the substrate, the raising layer comprising a plurality of raising portions arranged at intervals, wherein in a direction away from the substrate, a side of the raising portion away from the substrate comprises a fifth curved surface protruding from a plane where the substrate is located; A pixel defining layer and an isolation structure are sequentially formed on a side of the raised layer away from the substrate, the pixel defining layer defining a plurality of pixel openings, the pixel defining layer comprising an eighth curved surface protruding from the plane on which the substrate is located on a side close to the substrate, the eighth curved surface being in contact with the fifth curved surface, the isolation structure enclosing a plurality of isolation openings, the pixel openings being connected to the isolation openings, the isolation structure comprising a first isolation portion and a second isolation portion sequentially stacked in a direction away from the substrate, the second isolation portion comprising a protrusion, an orthographic projection of the protrusion on the substrate being outside an orthographic projection of the first isolation portion on the substrate away from the substrate, and at least a portion of a side of the protrusion close to the substrate in the direction away from the substrate comprising a first curved surface protruding from the plane on which the substrate is located; At least a portion of the light emitting unit is formed in the corresponding isolation opening.

16. The method for manufacturing a display panel according to claim 15, wherein: The step of forming a raised layer on one side of the substrate includes: A padding material layer is formed on one side of the substrate, and the padding material layer is patterned to form a plurality of padding portions that are spaced apart.

17. An electronic device, characterized in that: The electronic device comprises the display panel according to any one of claims 1 to 14, or comprises a display panel manufactured by the method for manufacturing a display panel according to claim 15 or 16.

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