Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, an isolation structure, a light-emitting function layer and a plurality of first electrodes, the isolation structure defines a plurality of first openings and a plurality of second openings, and the isolation structure comprises a first part and a second part which are arranged in a stacked mode; the light-emitting functional layer comprises a plurality of first light-emitting parts and a plurality of second light-emitting parts, at least parts of the first light-emitting parts are arranged in the first openings, and at least parts of the second light-emitting parts are arranged in the second openings; the edge of the first electrode is in lap joint with the first part, the shortest connecting line of the edge of the first electrode part and the first edge is a first connecting line, the shortest connecting line of the edge of the second electrode part and the second edge is a second connecting line, and the included angle between the second connecting line and the plane where the substrate is located is smaller than the included angle between the first connecting line and the plane where the substrate is located. According to the display panel provided by the invention, the preparation process of the display panel can be optimized.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) and display panels based on light emitting diode (LED) technologies have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages of high image quality, power saving, thin body and wide application range, becoming the mainstream of display devices. However, the current display panel preparation process needs to be improved. Summary of the invention

[0003] The embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel, aiming to improve technical problems in the manufacturing process of related display panels.

[0004] A first aspect of the present application provides a display panel, the display panel comprising:

[0005] substrate;

[0006] An isolation structure is arranged on one side of the substrate, the isolation structure encloses a plurality of first openings and a plurality of second openings, the isolation structure comprises a first portion and a second portion which are stacked, the first portion is arranged on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate, the second portion comprises a partition edge, the orthographic projection of the partition edge on the substrate is located at the edge of the orthographic projection of the second portion on the substrate, and the partition edge comprises a first edge defining the first openings and a second edge defining the second openings;

[0007] The light-emitting functional layer includes a plurality of first light-emitting portions and a plurality of second light-emitting portions, wherein at least a portion of the first light-emitting portion is disposed in the first opening, and at least a portion of the second light-emitting portion is disposed in the second opening, and the wavelength of light waves emitted by the first light-emitting portion is different from the wavelength of light waves emitted by the second light-emitting portion;

[0008] A plurality of first electrodes are located on a side of the light-emitting functional layer facing away from the substrate, the edge of the first electrode overlaps the side of the first part facing the defined opening, the plurality of first electrodes include a first electrode portion arranged on one side of the first light-emitting portion and a second electrode portion arranged on one side of the second light-emitting portion, the shortest line between the edge of the first electrode portion and the first edge is the first line, the shortest line between the edge of the second electrode portion and the second edge is the second line, and the angle between the second line and the plane where the substrate is located is smaller than the angle between the first line and the plane where the substrate is located.

[0009] According to an embodiment of the first aspect of the present application, the plurality of defined openings further include a third opening, the light-emitting functional layer further includes a plurality of third light-emitting portions, at least a portion of the third light-emitting portion is disposed in the third opening, and the partition edge further includes a third edge defining the third opening;

[0010] The multiple first electrodes include a third electrode portion arranged on one side of the third light-emitting portion, the shortest line between the edge of the third electrode portion and the third edge is the third line, and the angle between the third line and the plane where the substrate is located is smaller than the angle between the second line and the plane where the substrate is located.

[0011] According to an implementation scheme of the first aspect of the present application, the partition edge includes a first edge defining a first opening and a second edge defining a second opening, the minimum distance from the orthographic projection of the first edge on the substrate to the orthographic projection of the first part on the substrate is H1, and the minimum distance from the orthographic projection of the second edge on the substrate to the orthographic projection of the first part on the substrate is H2, and H1<H2.

[0012] According to an implementation of the first aspect of the present application, in a direction perpendicular to the plane where the substrate is located, the cross section of the second portion is a trapezoid;

[0013] According to an implementation of the first aspect of the present application, an orthographic projection area of ​​a surface of the second portion facing away from the substrate on the substrate is smaller than an orthographic projection area of ​​a surface of the second portion close to the substrate on the substrate.

[0014] According to an implementation of the first aspect of the present application, the partition edge is a periphery of a surface of the second portion close to the substrate.

[0015] According to an implementation of the first aspect of the present application, in a direction perpendicular to the plane where the substrate is located, a cross-section of the first portion is trapezoidal.

[0016] According to an implementation of the first aspect of the present application, an orthographic projection area of ​​a surface of the first portion facing away from the substrate on the substrate is smaller than an orthographic projection area of ​​a surface of the second portion close to the substrate on the substrate.

[0017] According to an implementation of the first aspect of the present application, the first part includes a single-layer metal structure.

[0018] According to an implementation of the first aspect of the present application, the first part includes a multi-layer metal structure, and an edge of the first electrode overlaps the metal structure.

[0019] According to an embodiment of the first aspect of the present application, the first part includes aluminum.

[0020] According to an embodiment of the first aspect of the present application, the first part includes a first sub-portion and a second sub-portion which are stacked, the second sub-portion is arranged on a side of the first sub-portion away from the substrate, the first sub-portion includes molybdenum and / or titanium, and the second sub-portion includes aluminum.

[0021] According to an implementation of the first aspect of the present application, the display panel further includes a pixel definition layer disposed between the substrate and the isolation structure, the pixel definition layer includes a pixel opening, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection range of the limiting opening on the substrate.

[0022] According to the implementation of the first aspect of the present application, the isolation structure is arranged on the side of the pixel definition layer facing away from the substrate, and the light-emitting functional layer is at least partially arranged in the pixel opening.

[0023] An embodiment of a second aspect of the present application provides a method for preparing a display panel, including:

[0024] providing a substrate;

[0025] An isolation structure is formed on one side of the substrate, the isolation structure encloses a plurality of defined openings, the defined openings include a first opening and a second opening, the isolation structure includes a first portion and a second portion which are stacked, the first portion is arranged on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate, the second portion includes a partition edge, the orthographic projection of the partition edge on the substrate is located at the edge of the orthographic projection of the second portion on the substrate, and the partition edge includes a first edge defining the first opening and a second edge defining the second opening;

[0026] A light-emitting functional layer and a first electrode are formed, wherein the light-emitting functional layer includes a first light-emitting portion and a second light-emitting portion, wherein at least a portion of the first light-emitting portion is disposed in the first opening, and at least a portion of the second light-emitting portion is disposed in the second opening; a plurality of first electrodes include a first electrode portion and a second electrode portion disposed on one side of the second light-emitting portion, wherein the shortest line between an edge of the first electrode portion and the first edge is a first line, and the shortest line between an edge of the second electrode portion and the second edge is a second line, and an angle between the second line and the plane where the substrate is located is smaller than an angle between the first line and the plane where the substrate is located.

[0027] According to an embodiment of the second aspect of the present application, forming the light-emitting functional layer and the first electrode includes:

[0028] A first luminescent material is arranged in each defined opening, and a first conductive material is evaporated at a first evaporation angle, and the first conductive material is stacked on one side of the first luminescent material;

[0029] Removing the first light-emitting material and the conductive material in the second opening so that the second electrode is exposed from the defined opening, and the second electrode is located on a side of the light-emitting functional layer close to the substrate;

[0030] A second luminescent material is arranged in each defined opening, and a second conductive material is evaporated at a second evaporation angle, the second conductive material is stacked on one side of the second luminescent material, and the first evaporation angle is smaller than the second evaporation angle;

[0031] The second light emitting material and the second conductive material in the first opening are removed.

[0032] An embodiment of the third aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments, or a display panel prepared according to any of the above embodiments.

[0033] According to the display panel, display device and display panel manufacturing method of the embodiment of the present application, by setting an isolation structure, the light-emitting portion and the first electrode at least partially located in the defined opening can be manufactured without using a metal mask, thereby eliminating the process and cost of the metal mask, optimizing the manufacturing process of the display panel, improving the efficiency of manufacturing the display panel, and reducing the cost of manufacturing the display panel. By setting the angle between the second connection line and the plane where the substrate is located to be smaller than the angle between the first connection line and the plane where the substrate is located, it is ensured that the edge of the first electrode formed by evaporation can overlap with the first portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0035] Figure 1 is a partial top view of a display panel provided in an embodiment of the present application;

[0036] Figure 2 is a partial cross-sectional view of a display panel provided in an embodiment of the present application;

[0037] Figure 3 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0038] Figure 4 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0039] Figure 5 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0040] Figure 6 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0041] Figure 7 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0042] Figure 8 is a partial cross-sectional view of a display panel in another embodiment provided by the embodiment of the present application;

[0043] Fig. 9 is a process diagram of a method for preparing a display panel provided in an embodiment of the present application;

[0044] Fig.10 It is a process diagram of a method for preparing a display panel provided in an embodiment of the present application.

[0045] Description of reference numerals:

[0046] 1. Substrate; 11. Underlying layer; 12. Flat layer; 13. Array substrate; 131. Active layer; 132. Gate; 133. Drain; 137. Source; 135. First electrode; 136. Second electrode; 2. First electrode; 21. First electrode portion; 22. Second electrode portion; 23. Third electrode portion; 3. Isolation structure; 31. First portion; 311. First sub-portion; 312. First sub-portion; 32. Second portion; 321. Partition edge; 33. Defined opening; 331. First opening; 332. Second opening; 333. Third opening; 41. First light-emitting portion; 42. Second light-emitting portion; 43. Third light-emitting portion; 5. Second electrode; 6. Pixel definition layer; 71. First encapsulation layer; 72. Second encapsulation layer; 73. Third encapsulation layer. DETAILED DESCRIPTION

[0047] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0050] In order to solve the above problems, embodiments of the present application provide a display panel and a display device. Various embodiments of the display panel and the display device will be described below in conjunction with the accompanying drawings.

[0051] The embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device. Figures 1 to 10 Various embodiments of a display panel, a method for manufacturing a display panel, and a display device are described.

[0052] See also Figure 1 and Figure 2The display panel includes a substrate 1, an isolation structure 3, a light-emitting functional layer and a plurality of first electrodes 2, wherein the isolation structure 3 is arranged on one side of the substrate 1, the isolation structure 3 encloses a plurality of defined openings 33, the plurality of defined openings 33 include a first opening 331 and a second opening 332, the isolation structure 3 includes a first portion 31 and a second portion 32 which are stacked, the first portion 31 is arranged on a side of the second portion 32 close to the substrate 1, the orthographic projection of the first portion 31 on the substrate 1 is located within the orthographic projection of the second portion 32 on the substrate 1, the second portion 32 includes a partition edge 321, the orthographic projection of the partition edge 321 on the substrate 1 is located at the edge of the orthographic projection of the second portion 32 on the substrate 1, the partition edge 321 includes a first edge 322 defining the first opening 331 and a second edge 323 defining the second opening 332; the light-emitting functional layer includes a plurality of first light-emitting portions 4 1 and multiple second light-emitting portions 42, at least part of the first light-emitting portion 41 is arranged in the first opening 331, at least part of the second light-emitting portion 42 is arranged in the second opening 332, the wavelength of the light wave emitted by the first light-emitting portion 41 is different from the wavelength of the light wave emitted by the second light-emitting portion 42; the first electrode 2 is located on the side of the light-emitting functional layer away from the substrate 1, the edge of the first electrode 2 overlaps the side of the first portion 31 facing the defined opening 33, the multiple first electrodes 2 include a first electrode portion 21 arranged on one side of the first light-emitting portion 41 and a second electrode portion 22 arranged on one side of the second light-emitting portion 42, the shortest connecting line between the edge of the first electrode portion 21 and the first edge 322 is the first connecting line, the shortest connecting line between the edge of the second electrode portion 22 and the second edge 323 is the second connecting line, and the angle θ2 between the second connecting line and the plane where the substrate 1 is located is smaller than the angle θ1 between the first connecting line and the plane where the substrate 1 is located. Among them, the shortest line between the edge of the first electrode portion 21 and the first edge 322 refers to the line between the edge of the first electrode portion 21 and the corresponding first edge 322 in a cross-sectional view perpendicular to the plane where the substrate 1 is located; the shortest line between the edge of the second electrode portion 22 and the second edge 323 refers to the line between the edge of the second electrode portion 22 and the corresponding second edge 323 in a cross-sectional view perpendicular to the plane where the substrate 1 is located.

[0053] The embodiment of the present application provides a display panel that can be a display panel based on organic light emitting diode (OLED) technology. In the display panel provided in the embodiment of the present application, the substrate 1 can not only provide support for the isolation structure 3, but also provide an electrical signal for the first electrode 2. There are many ways to set the substrate 1. In some embodiments, the substrate 1 may include a substrate 11 and an array substrate 13 arranged on the substrate 11, and the array substrate 13 may include a pixel driving circuit, a first conductive layer, a second conductive layer, a third conductive layer, and a fourth conductive layer arranged in a stacked manner. Exemplarily, the pixel driving circuit arranged on the array substrate 13 includes a transistor and a storage capacitor. The transistor includes an active layer 131, a gate 132, a drain 133, and a source 137. The storage capacitor includes a first plate 135 and a second plate 136. As an example, the gate 132 and the first plate 135 may be located in the third conductive layer, the second plate 136 may be located in the second conductive layer, and the drain 133 and the source 137 may be located in the first conductive layer.

[0054] It can be understood by those skilled in the art that in order to realize that the display panel emits light of different colors, it is necessary to prepare light-emitting parts for emitting different colors, and the isolation structure 3 is spaced between each light-emitting part. The light-emitting parts of different colors can be prepared in steps, that is, first prepare a plurality of first light-emitting parts 41 for emitting the first color light, and then prepare a plurality of second light-emitting parts 42 for emitting the second color light, and so on, until the light-emitting parts for emitting different colors are prepared. In the present application, the light-emitting parts for emitting different colors include the first light-emitting part 41 and the second light-emitting part 42, wherein "first" and "second" are only used for distinction, and do not necessarily require or imply that the light-emitting functional layer of the present application solution is composed of the light-emitting parts of the first light-emitting part 41 and the second light-emitting part 42. The present application solution can also include light-emitting parts for emitting a third, four, five... colors. The wavelength of the light wave emitted by the first light-emitting part 41 is different from the wavelength of the light wave emitted by the second light-emitting part 42. It can be understood that the color of the first color light emitted by the first light-emitting part 41 and the second color light emitted by the second light-emitting part 42 is different.

[0055] The isolation structure 3 encloses and forms a limited opening 33 to limit the setting range of the light-emitting functional layer. The isolation structure 3 includes a first part 31 and a second part 32 which are stacked, and the orthographic projection of the first part 31 on the substrate 1 is located within the orthographic projection of the second part 32 on the substrate 1, so that the cross-sectional area of ​​the end of the isolation structure 3 away from the substrate 1 is larger, and the cross-sectional area of ​​the end of the isolation structure 3 close to the substrate 1 is smaller. Along the direction from the isolation structure 3 to the substrate 1, the second part 32 completely blocks the first part 31. The number of limited openings 33 can correspond to the number of light-emitting parts one by one. In the case where the light-emitting functional layer has multiple light-emitting parts, the multiple limited openings 33 can also include openings corresponding to various light-emitting parts one by one. The shapes and sizes of the first opening 331 and the second opening 332 can be consistent or inconsistent.

[0056] When preparing the light-emitting portion, the light-emitting material A used to prepare the first light-emitting portion 41 can be covered on the isolation structure 3 based on the evaporation technology. Since the second portion 32 blocks the first portion 31, the light-emitting material A used to prepare the first light-emitting portion 41 has a large drop at the partition edge 321 of the second portion 32, and the light-emitting material A falling in the defined opening 33 and the light-emitting material A falling on the second portion 32 are difficult to connect, so they are broken, forming light-emitting materials A spaced in adjacent defined openings 33. The light-emitting material A falling on the second portion 32 and the light-emitting material A falling in other defined openings 33 except the first opening 331 (for example, the light-emitting material A falling in the second opening 332) can be removed as needed. The light-emitting material B used to prepare the second light-emitting portion 42 can be covered on the isolation structure 3 based on the evaporation technology. Similarly, because the second part 32 blocks the first part 31, the luminescent material B used to prepare the second luminescent portion 42 has a large drop at the partition edge 321 of the second part 32, and the luminescent material B falling in the defined opening 33 and the luminescent material B falling on the second part 32 are difficult to connect, so they are broken, forming luminescent materials B spaced in adjacent defined openings 33. The luminescent material B falling on the second part 32 and the luminescent material B falling in other defined openings 33 except the second opening 332 (for example, the luminescent material B falling in the first opening 331) can be removed as needed. By analogy, luminescent portions capable of emitting light of different colors are prepared in sequence until a luminescent functional layer having multiple luminescent portions is prepared.

[0057] Therefore, compared with the related art of preparing the light-emitting functional layer by evaporation of a mask, the present application sets the first part 31 and the second part 32, so that the light-emitting part located in the defined opening 33 can be prepared without a mask, thereby saving the cost of preparing a mask. Compared with preparing a high-precision mask, it is easier to directly prepare a high-precision isolation structure 3, so that the structure of the display panel provided by the present application has low requirements on the preparation process, and the consistency of the prepared display panel is good.

[0058] When preparing the first electrode 2, the conductive material C used to prepare the first electrode 2 can be covered on the isolation structure 3 and the light-emitting functional layer based on the evaporation technology. The conductive material C used to prepare the first electrode 2 has a large drop at the partition edge 321, and the conductive material C falling in the defined opening 33 and the conductive material C falling on the second part 32 are difficult to connect, so they are broken to form the first electrode 2 arranged at intervals. The conductive material C falling on the second part 32 can be removed as needed. At least part of the first electrode 2 is located in the defined opening 33. In the case where the first part 31 is at least partially conductive, the first electrode 2 can be overlapped with the conductive area of ​​the first part 31 to supply power to the first electrode 2, and the adjacent first electrodes 2 can also be made conductive, thereby forming a surface electrode with full surface conductivity.

[0059] In the case where one or more light-emitting parts have been prepared, it is necessary to remove the unnecessary light-emitting materials and conductive materials in the partially defined opening 33 before preparing the light-emitting parts by vapor deposition again. The treatment process may cause the first part 31 in contact with the removed light-emitting materials and conductive materials to be corroded, causing the size of the first part 31 to be reduced. In the embodiment provided in the present application, the first electrodes 2 located on different light-emitting parts are formed by vapor deposition at different angles, so that the conductive material C that forms the first electrode 2 later can pass through the second light-emitting part 42 into the defined opening 33 and overlap with the first part 31 with a reduced size. In the prepared display panel, the angle θ2 between the second connecting line and the plane where the substrate 1 is located is smaller than the angle θ1 between the first connecting line and the plane where the substrate 1 is located. Figure 2 As shown, the dotted line L1 represents a reference line parallel to the plane where the substrate 1 is located, the vertices of the angle θ1 and the angle θ2 are both the connection points between the surface of the first electrode 2 away from the substrate 1 and the first part 31, θ2<θ1.

[0060] Exemplarily, the luminescent material A of the first luminescent portion 41 is vapor-deposited in both the first opening 331 and the second opening 332, and the conductive material C is vapor-deposited at a first vapor-depositing angle to form a layer of conductive material C on the luminescent material A; the luminescent material A and the conductive material C located in the second opening 332 are removed, and the removal process causes the first portion 31 defining the second opening 332 to be partially corroded, and the angle between the shortest line from the edge of the end of the partially corroded first portion 31 close to the substrate 1 to the partition edge 321 and the plane where the substrate 1 is located is reduced. The luminescent material B of the second luminescent portion 42 is vapor-deposited in the second opening 332, and the conductive material C is vapor-deposited at a second vapor-depositing angle, which is greater than the first vapor-depositing angle, to ensure that the conductive material C in the second opening 332 can overlap with the first portion 31.

[0061] In the present application, by setting the isolation structure 3, the light-emitting portion and the first electrode 2 at least partially located in the defined opening 33 can be prepared without using a metal mask, thereby eliminating the process and cost of the metal mask, optimizing the preparation process of the display panel, improving the efficiency of producing the display panel, and reducing the cost of producing the display panel. By setting the angle θ2 between the second connection line and the plane where the substrate 1 is located to be smaller than the angle θ1 between the first connection line and the plane where the substrate 1 is located, it is ensured that the edge of the first electrode 2 formed by evaporation can overlap with the first portion 31.

[0062] like Figure 1 As shown, in some optional embodiments, the isolation structure 3 extends in a first direction X and a second direction Y in a grid shape, and the first direction X and the second direction Y intersect.

[0063] The isolation structure 3 is in a grid shape, which means that the isolation structure 3 extends in the first direction X and the second direction Y, and the portion extending along the first direction X and the portion extending along the second direction Y are cross-connected to each other to form a plurality of grid spaces, and the substrate 1 is exposed from the grid space, and the second electrode 5 and the light-emitting functional layer can be located in the grid space, so that the isolation structure 3 surrounds the second electrode 5 and the light-emitting functional layer, that is, the second electrode 5, the light-emitting functional layer and the first electrode 2 are separated by the isolation structure 3 in the first direction X and the second direction Y. It should be noted that the orthographic projection of the isolation structure 3 on the substrate can also be an independent ring, which is not limited to this.

[0064] See also Figure 3 In some embodiments, the plurality of defined openings 33 further include a third opening 333, the light-emitting functional layer further includes a plurality of third light-emitting portions 43, at least a portion of the third light-emitting portion 43 is disposed in the third opening 333, and the partition edge further includes a third edge 324 defining the third opening 333;

[0065] The plurality of first electrodes 2 include a third electrode portion 23 disposed on one side of the third light-emitting portion 43, the shortest line between the edge of the third electrode portion 23 and the third edge 324 is the third line, and the angle between the third line and the plane where the substrate 1 is located is smaller than the angle θ3 between the second line and the plane where the substrate 1 is located. The shortest line between the edge of the third electrode portion 23 and the third edge 324 refers to a line between the edge of the third electrode portion 23 and its corresponding third edge 324 in a certain cross-sectional view perpendicular to the plane where the substrate 1 is located. It should be noted that the lines referred to in this application all refer to straight lines.

[0066] The wavelength of the light wave emitted by the first light-emitting part 41, the wavelength of the light wave emitted by the second light-emitting part 42 and the wavelength of the light wave emitted by the third light-emitting part 43 are different. The first light-emitting part 41, the second light-emitting part 42 and the third light-emitting part 43 can be a red light-emitting part emitting red light, a green light-emitting part emitting green light and a blue light-emitting part emitting blue light respectively. During preparation, the first light-emitting part 41, the second light-emitting part 42 and the third light-emitting part 43 can be prepared by evaporation in sequence, and the first electrode 2 stacked with the first light-emitting part 41, the first electrode 2 stacked with the second light-emitting part 42 and the first electrode 2 stacked with the third light-emitting part 43 are prepared by evaporation with a gradually increasing evaporation angle, so that the prepared first electrode 2 shows θ3<θ2<θ1.

[0067] The first part 31 and the second part 32 may be an integrally formed structure, or the first part 31 and the second part 32 may be a layered structure made of the same material or different materials.

[0068] Exemplarily, the first part 31 and the second part 32 are an integrally formed structure. When preparing the isolation structure 3, a material D for preparing the isolation structure 3 may be firstly arranged on the substrate 1, and the material D may be patterned to form the first part 31 and the second part 32 that shields the first part 31. In the cross-sectional structure diagram along the direction from the substrate 1 to the light-emitting functional layer, the cross section of the isolation structure 3 may be a trapezoid with the top edge facing the substrate 1.

[0069] For example, Figure 3 As shown, the first part 31 and the second part 32 are layer structures prepared in layers. When preparing the isolation structure 3, a material E for preparing the first part 31 can be firstly arranged on the substrate 1, and then a material F for preparing the second part 32 can be arranged on the material E for preparing the first part 31, and then the material E and the material F are patterned to form the first part 31 and the second part 32 covering the first part 31.

[0070] See also Figure 4 In some embodiments, the minimum distance from the orthographic projection of the first edge 322 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H1, and the minimum distance from the orthographic projection of the second edge 323 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H2, and H1<H2.

[0071] When preparing the display panel, the first light emitting portion 41 and the first electrode 2 located in the first opening 331 may be prepared first, and then the second light emitting portion 42 and the first electrode 2 located in the second opening 332 may be prepared. When the above-mentioned preparation process is adopted, since the first light emitting portion 41 is prepared first, after the light emitting material and the conductive material located in the second opening 332 are removed, the side surface of the first portion 31 defining the second opening 332 is partially corroded, thereby presenting H1<H2.

[0072] When the light-emitting display layer includes the third light-emitting portion 43, the partition edge 321 includes a third edge 324 defining a third opening 333, and the minimum distance from the orthographic projection of the third edge 324 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H3, H1<H2<H3.

[0073] See also Figure 5 In some embodiments, in a direction perpendicular to the plane where the substrate 1 is located, the cross-section of the second portion 32 is a trapezoid.

[0074] Optionally, the cross section of the second portion 32 is a trapezoid with the bottom edge facing the substrate 1, so that the second portion 32 has a sloped surface, which is conducive to the preparation material being cut off at the partition edge 321, so that part of the preparation material is located on the second portion 32 and part of the preparation material is located in the limited opening 33. Figure 6 The cross section of the second portion 32 is a trapezoid with the top edge facing the substrate 1. The first edge 322 and the second edge 312 are respectively located at the connection between the bottom edge and the side edge of the trapezoidal cross section.

[0075] The cross section of the second portion 32 may also have other structures. Figure 7 In this embodiment, the cross section of the second portion 32 is a hexagon, and the first edge 322 and the second edge 312 are respectively located at the connection of two side edges of the hexagonal cross section.

[0076] See also Figure 5 In some embodiments, the orthographic projection area of ​​the surface of the second portion 32 facing away from the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the surface of the second portion 32 close to the substrate 1 on the substrate 1 .

[0077] The second portion 32 extends outwardly by a predetermined distance relative to the first portion 31, that is, the orthographic projection area of ​​the surface of the second portion 32 facing away from the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the surface of the second portion 32 close to the substrate 1 on the substrate 1, so that the second portion 32 has an inclined slope structure, so that the pattern of the light-emitting functional layer can be defined by the second portion 32.

[0078] When the cross section of the second portion 32 is trapezoidal and the surface of the second portion 32 facing away from the substrate 1 is smaller than the surface of the second portion 32 close to the substrate 1 , the partition edge 321 is the periphery of the surface of the second portion 32 close to the substrate 1 .

[0079] In some optional embodiments, the first portion 31 includes a single-layer metal structure. For example, the first portion 31 may include only one layer of aluminum, and a side surface of the aluminum is connected to the first electrode 2 .

[0080] Alternatively, according to actual needs, the first portion 31 may also include a multi-layer metal structure, for example, see Figure 7 The first part 31 may include a first sub-part 311 and a second sub-part 312 that are stacked, the first sub-part 311 includes molybdenum and / or titanium, and the second sub-part 312 includes aluminum. The first electrode 2 may overlap with at least one of the first sub-part 311 and the second sub-part 312 to ensure that adjacent first electrodes 2 can be conductively connected through the isolation structure 3.

[0081] Optionally, the etching rate of molybdenum and titanium is low, so that the first sub-portion 311 extends outward relative to the second sub-portion 312, and the cross-section of the first portion 31 is trapezoidal, which is convenient for overlapping with the first electrode 2 formed by evaporation. When both the first sub-portion 311 and the second portion 32 are made of titanium metal, the preparation process can be simplified.

[0082] In some optional embodiments, the orthographic projection area of ​​the surface of the second portion 32 facing the substrate 1 on the substrate 1 is larger than the orthographic projection area of ​​the surface of the first portion 31 facing away from the substrate 1 on the substrate 1. That is, the second portion 32 extends outward relative to the first portion 31 to limit the pattern of the first electrode 2 and the light-emitting functional layer through the second portion 32. The area of ​​the second portion 32 is larger than the first portion 31, and it is arranged to completely cover the first portion 31. At this time, the first portion 31 is recessed relative to the second portion 32 in a direction away from the defined opening 33. When preparing the second electrode 5, the second electrode 5 has a large drop at the edge of the isolation structure 3, and the first portion 31 is arranged inwardly, and the second electrode 5 is difficult to connect outside the isolation structure 3, so that a break is found, forming a mutually isolated second electrode 5.

[0083] In some optional embodiments, along a direction perpendicular to the plane where the substrate 1 is located, a cross-section of the first portion 31 is trapezoidal.

[0084] The cross section of the first portion 31 is a regular trapezoid, which increases the contact area between the first electrode 2 and the first portion 31, so as to ensure the stability of the overlap when the first electrode 2 overlaps the first portion 31. When the cross section of the first portion 31 is a regular trapezoid, on the one hand, it can stably support the second portion 32, and on the other hand, it makes the contact surface area between the first sub-portion 311 and the second portion 32 smaller, so that the first portion 31 is concavely arranged relative to the second portion 32 in a direction away from the central axis of the defined opening 33, so that the second electrode 5 and the light-emitting functional layer are disconnected at the position of the isolation structure 3.

[0085] In these optional embodiments, in order to obtain the first portion 31 with a concave setting, during the etching process, the second sub-portion 312 has a faster etching rate relative to the first sub-portion 311 and / or the second portion 32, thereby forming the concave first portion 31. Since the etching rate of the second sub-portion 312 is faster, more waste generated by etching is easy to enter other positions of the display panel, thereby causing adverse effects. The orthographic projection of the second sub-portion 312 on the substrate 1 is set to be within the orthographic projection of the first sub-portion 311 on the substrate 1, so that the second sub-portion 312 can be better supported on the first sub-portion 311, and the generated etching waste falls on the first sub-portion 311, which is easy to clean.

[0086] Optionally, the orthographic projection of the second portion 32 on the substrate 1 coincides with the orthographic projection of the first sub-portion 311 on the substrate 1. The first sub-portion 311 and the second portion 32 having the same area can be etched using the same mask, thereby simplifying the manufacturing process.

[0087] See also Figure 8 In some embodiments, the display panel further includes a pixel definition layer 6 disposed between the substrate 1 and the isolation structure 3 , the pixel definition layer 6 includes a pixel opening, and the orthographic projection of the pixel opening on the substrate 1 is located within the orthographic projection range of the limiting opening 33 on the substrate 1 .

[0088] In this embodiment, the pixel definition layer 6 is disposed on the substrate 1 and includes a pixel opening, and the light-emitting function layer is at least partially disposed in the pixel opening to achieve light-emitting display of the display panel.

[0089] The isolation structure 3 may be directly disposed on a side of the pixel definition layer 6 facing away from the substrate 1 , and the isolation structure 3 may be supported by the pixel definition layer 6 .

[0090] In some embodiments, the orthographic projection of the pixel opening on the substrate 1 is within the orthographic projection range of the limiting opening 33 on the substrate 1. The area of ​​the limiting opening 33 is larger than the area of ​​the pixel opening, which can reduce the influence of the isolation structure 3 on the light output viewing angle of the light-emitting functional layer.

[0091] In some embodiments, a plurality of pixel openings are distributed at intervals, and a light-emitting functional layer is disposed in each pixel opening.

[0092] In some embodiments, the substrate 1 further includes a planarization layer 12 supporting the pixel definition layer 6, and the planarization layer 12 provides a preparation plane for the pixel definition layer 6 to facilitate the preparation of the pixel definition layer 6. The material of the planarization layer 12 can be hexamethyldisiloxane, epoxy resin or polyimide, and can also be other inorganic materials, which is not limited in this embodiment.

[0093] It should be noted that the isolation structure 3 of the present application can also be directly set on the planarization layer 12 according to the requirements, and the present application does not limit it.

[0094] In some embodiments, the display panel further includes a plurality of second electrodes 5. The plurality of second electrodes 5 may be arranged at intervals, and the second electrodes 5, the light-emitting functional layer and the first electrode 2 are sequentially stacked along the direction from the substrate 1 to the light-emitting functional layer. The plurality of second electrodes 5 form a plurality of point electrodes, so that different electrical signals may be input to the plurality of second electrodes 5 to control whether the light-emitting functional layer in contact with the second electrode 5 emits light and how long the light-emitting layer emits light.

[0095] One of the second electrode 5 and the first electrode 2 can be used as an anode electrode, and the other can be used as a cathode electrode. The second electrode 5, the light-emitting functional layer, and the first electrode 2 can be stacked and contacted in sequence to achieve electrical conduction between the second electrode 5, the light-emitting functional layer, and the first electrode 2. Optionally, the second electrode 5 is an anode electrode, and the first electrode 2 is a cathode electrode.

[0096] The embodiment of the present application is illustrated by taking the second electrode 5 as the anode and the first electrode 2 as the cathode. The light-emitting functional layer may include one or more of an electron injection layer, an electron transport layer, a light-emitting material layer, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. It can be selected according to the specific type of the light-emitting functional layer, and there is no special limitation. The electron injection layer, the electron transport layer, and the hole blocking layer may be arranged between the second electrode 5 and the light-emitting material layer. The electron blocking layer, the hole transport layer and the hole injection layer may be arranged between the first electrode 2 and the light-emitting material layer.

[0097] The material of the second electrode 5 is generally a material with a high work function to improve the hole injection efficiency, and can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO) or a transparent conductive polymer (such as polyaniline), etc. For example, the second electrode 5 can be made of an ITO-Ag-ITO composite material, without special limitation.

[0098] The material of the first electrode 2 can be one of the metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), and can also be an alloy of the aforementioned metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al), which is not limited in this embodiment.

[0099] In some embodiments, the display panel further includes a first encapsulation layer 71, which covers the side of the first electrode 2 facing away from the substrate 1 and contacts the side wall of the isolation structure 3 facing the defined opening 33. The first encapsulation layer 71 can isolate water vapor and the like from entering the light-emitting functional layer, and can also avoid or reduce failure of the light-emitting functional layer caused by mechanical external force, thereby improving the reliability of the display panel.

[0100] In some embodiments, the display panel further includes a second encapsulation layer 72 located on the side of the first encapsulation layer 71 away from the substrate 1, and a third encapsulation layer 73 located on the side of the second encapsulation layer 72 away from the substrate 1. The first encapsulation layer 71, the second encapsulation layer 72 and the third encapsulation layer 73 can be inorganic materials and / or organic materials. The inorganic material can specifically be inorganic materials such as silicon nitride, silicon oxide and silicon oxynitride, and can specifically be formed by a CVD (Chemical Vapor Deposition) process. The organic material can be made of resin or polymer organic material, and can specifically be formed by an IJP (Inkjet printing) process. Optionally, the first encapsulation layer 71 and the third encapsulation layer 73 are inorganic materials, and the second encapsulation layer 72 is an organic material.

[0101] The present application also provides a method for preparing a display panel, comprising the following steps:

[0102] S110, providing a substrate;

[0103] S120, forming an isolation structure on one side of the substrate, the isolation structure enclosing a plurality of defined openings, the defined openings including a first opening and a second opening, the isolation structure including a first portion and a second portion which are stacked, the first portion being disposed on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate being located within the orthographic projection of the second portion on the substrate, the second portion including a partition edge, the orthographic projection of the partition edge on the substrate being located at an edge of the orthographic projection of the second portion on the substrate, the partition edge including a first edge defining the first opening and a second edge defining the second opening;

[0104] S130, forming a light-emitting functional layer and a first electrode, wherein the light-emitting functional layer includes a plurality of first light-emitting portions and a plurality of second light-emitting portions, wherein at least a portion of the first light-emitting portion is disposed in the first opening, and at least a portion of the second light-emitting portion is disposed in the second opening; the plurality of first electrodes include a first electrode portion and a second electrode portion disposed on one side of the second light-emitting portion, wherein the shortest line between an edge of the first electrode portion and the first edge is a first line, and the shortest line between an edge of the second electrode portion and the second edge is a second line, and an angle between the second line and the plane where the substrate is located is smaller than an angle between the first line and the plane where the substrate is located;

[0105] In the display panel manufacturing method provided in the embodiment of the present application,

[0106] In S110, the substrate may be formed by coating, curing, film forming and other processes. The substrate may be a hard substrate, such as a glass substrate; or a flexible substrate, and its material may be polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone or polyethylene naphthalate. The substrate is mainly used to support the device disposed thereon.

[0107] In S120, to form an isolation structure, a first portion of a material layer 310 and a second portion of a material layer 320 may be sequentially formed on one side of the substrate. Fig. 9 As shown in (b), the second portion material layer 320 is then etched to form the second portion 32 and the first portion 32, as shown in FIG. Fig. 9 (c) as shown.

[0108] Specifically, at least one of dry etching or wet etching processes can be used to etch and remove the first material layer 310 and the second material layer 320 respectively. It can be understood that the specific materials of the first material layer 310 and the second material layer 320 are etched using corresponding etching solvents without special limitations.

[0109] In S130, the electron injection layer, electron transport layer, hole blocking layer, light emitting material layer, electron blocking layer, hole transport layer, hole injection layer and other film layers of the light emitting functional layer, and the first electrode can be formed by an evaporation process.

[0110] In some embodiments, S130 includes:

[0111] S210, placing a first luminescent material in each defined opening, evaporating a first conductive material at a first evaporation angle, and stacking the first conductive material on one side of the first luminescent material;

[0112] S220, removing the first light-emitting material and the first conductive material in the second opening, so that the second electrode is exposed from the defined opening, and the second electrode is located on a side of the light-emitting functional layer close to the substrate;

[0113] S230, placing a second luminescent material in each defined opening, evaporating a second conductive material at a second evaporation angle, the second conductive material being stacked on one side of the second luminescent material, and the first evaporation angle being smaller than the second evaporation angle;

[0114] S240, removing the second light emitting material and the second conductive material in the first opening.

[0115] In the embodiment provided in the present application, the first light-emitting portion and the first electrode portion are prepared first, and then the second light-emitting portion and the second electrode portion are prepared, and the first electrode portion and the second electrode portion are formed by evaporation at different evaporation angles, thereby avoiding the technical problem that the first electrode prepared later is poorly overlapped with the first portion when the first electrode is formed by evaporation at the same evaporation angle due to the corrosion of the first portion by the removal process in S220. The first electrode portion and the second electrode portion are formed by evaporation at different evaporation angles, so that the first portion overlaps with the edge of the first electrode, thereby improving the yield rate of the display panel.

[0116] The first conductive material in S210 and the second conductive material in S230 can be the same material to simplify the preparation steps. The first light-emitting material and the first conductive material located in the first opening form the first light-emitting portion and the first electrode portion, respectively, and the second light-emitting material and the second conductive material located in the second opening form the second light-emitting portion and the second electrode portion, respectively. In the case of having more than two light-emitting portions that emit different colors, you can also refer to S210 to S240, and evaporate different light-emitting materials in the third, fourth, and fifth openings in steps, and use gradually increasing evaporation angles to evaporate conductive materials, and retain a light-emitting material and conductive material in the limited opening through removal processing.

[0117] In some embodiments, after S210, the following steps may also be included:

[0118] Covering the side of the first conductive material facing away from the substrate with a first packaging material;

[0119] S220 includes:

[0120] Removing the first packaging material, the first light emitting material, and the first conductive material in the second opening so that the second electrode is exposed from the defined opening;

[0121] After S230, it can also include:

[0122] Covering the side of the second conductive material facing away from the substrate with a second packaging material;

[0123] S240 includes:

[0124] The second light emitting material, the second conductive material and the second packaging material located on the side of the first conductive material away from the substrate are removed.

[0125] For example, see Fig. 9 (a), a second electrode 5 and a pixel definition layer 6 are provided on the substrate 1, and the second electrode 5 is exposed from the pixel definition layer 6; see Fig. 9 (b) For ease of presentation, Fig. 9 (b) does not show the substrate 1. A first material layer 310 and a second material layer 320 are disposed on the substrate 1 and cover the second electrode 5 and the pixel definition layer 6; see Fig. 9(c) Patterning the first material layer 310 and the second material layer 320 to obtain an isolation structure 3, wherein the first material layer 310 disposed on the substrate 1 forms a first portion 31, and the second material layer 320 disposed on the substrate 1 forms a second portion 32. The orthographic projection of the first portion 31 of the isolation structure 3 on the substrate 1 is located within the orthographic projection of the second portion 32 on the substrate, and the isolation structure 3 encloses a plurality of defined openings 33, from which the second electrode 5 is exposed. The line from the end edge of the first portion 31 connected to the pixel definition layer 6 to the partition edge is the reference line, Fig. 9 The dotted line L2 in (c) shows the plane where the pixel definition layer 6 is located. The angle between the plane and the reference line is α, and the angle α corresponding to each first part 31 is substantially the same. For example: Fig. 9 (c) shows that α1=α2.

[0126] See also Fig.10 (a), sequentially evaporating the first light-emitting material, evaporating the first conductive material, and depositing the first packaging material, wherein the first conductive material is evaporated at a first evaporation angle β1 to prepare the first electrode portion 21. A light-emitting material layer, a conductive material layer, and a packaging material layer are formed in a plurality of defined openings 33 including a first opening 331 and a second opening 332, and a portion of the first light-emitting material, the first conductive material layer, and the first packaging material layer are stacked on the second portion 32. At this stage, α1 is still the same as α2; see Fig.10 (b) The first light emitting material, the first conductive material, and the first packaging material in the second opening 332 and on the second portion 32 are removed, so that part of the second electrode 5 is exposed from the second opening 332. The removal process may be etching, and when the first light emitting material, the first conductive material, and the first packaging material in the second opening 332 are etched, part of the first portion 31 is corroded, so that α1>α2; see Fig.10 (c), sequentially evaporating a second light-emitting material, evaporating a second conductive material, and depositing a second packaging material, wherein the second conductive material is evaporated at a second evaporation angle β2 to prepare a second electrode portion 22, β2>β1, and a second light-emitting material layer, a second conductive material layer, and a second packaging material layer are formed in a plurality of defined openings 33 including the first opening 331 and the second opening 332, and a portion of the second light-emitting material, the second conductive material, and the second packaging material layer are stacked on the second portion 32, forming an angle θ2 between the second connecting line and the plane where the substrate 1 is located, which is smaller than an angle θ1 between the first connecting line and the plane where the substrate 1 is located; see Fig.10(d) The second light emitting material, the second conductive material, and the second packaging material in the first opening 331 and on the second portion 32 are removed. The first light emitting material in the first opening 331 forms the first light emitting portion 41, the first conductive material forms the first electrode portion 21, and the first packaging material forms the first packaging layer 71 located on one side of the first electrode portion 21. The second light emitting material in the second opening 332 forms the second light emitting portion 42, the second conductive material forms the second electrode portion 22, and the second packaging material forms the first packaging layer 71 located on both sides of the second electrode portion 22. Please refer to Fig.10 (e) After the light-emitting functional layer, the first electrode and the first encapsulation layer 71 are prepared, a third and a fourth encapsulation material covering the first encapsulation layer 71 are provided to form a second encapsulation layer 73 and a third encapsulation layer 74 respectively.

[0127] The embodiment of the third aspect of the present application also provides a display device, including the display panel of any of the above-mentioned first aspect embodiments, or including the display panel prepared by any of the above-mentioned second aspect embodiments. Since the display device provided by the embodiment of the third aspect of the present application includes the display panel of any of the above-mentioned first or second aspects, the display device provided by the embodiment of the third aspect of the present application has the beneficial effects of the display panel of any of the above-mentioned first or second aspects, which will not be repeated here.

[0128] The display device provided in the embodiment of the present application can be applied to a mobile phone, or it can be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present application does not make any special limitations on this.

[0129] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

[0130] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of defined openings, the plurality of defined openings comprising a first opening and a second opening, the isolation structure comprising a first portion and a second portion which are stacked, the first portion being disposed on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate being located within the orthographic projection of the second portion on the substrate, the second portion comprising a partition edge, the orthographic projection of the partition edge on the substrate being located at an edge of the orthographic projection of the second portion on the substrate, the partition edge comprising a first edge defining the first opening and a second edge defining the second opening; A light-emitting functional layer, comprising a plurality of first light-emitting portions and a plurality of second light-emitting portions, wherein at least a portion of the first light-emitting portions is disposed in the first opening, and at least a portion of the second light-emitting portions is disposed in the second opening; A plurality of first electrodes are located on a side of the light-emitting functional layer facing away from the substrate, an edge of the first electrode overlaps the side of the first part facing the defined opening, the plurality of first electrodes include a first electrode portion arranged on one side of the first light-emitting portion and a second electrode portion arranged on one side of the second light-emitting portion, the shortest line between an edge of the first electrode portion and the first edge is a first line, the shortest line between an edge of the second electrode portion and the second edge is a second line, and an angle between the second line and the plane where the substrate is located is smaller than an angle between the first line and the plane where the substrate is located.

2. The display panel according to claim 1, characterized in that: The plurality of defined openings further include a third opening, the light-emitting functional layer further includes a plurality of third light-emitting portions, at least a portion of the third light-emitting portions is disposed in the third opening, and the partition edge further includes a third edge defining the third opening; The multiple first electrodes include a third electrode portion arranged on one side of the third light-emitting portion, the shortest line between the edge of the third electrode portion and the third edge is a third line, and an angle between the third line and the plane where the substrate is located is smaller than an angle between the second line and the plane where the substrate is located.

3. The display panel according to claim 1, characterized in that: The minimum distance from the orthographic projection of the first edge on the substrate to the orthographic projection of the first part on the substrate is H1, and the minimum distance from the orthographic projection of the second edge on the substrate to the orthographic projection of the first part on the substrate is H2, H1<H2.

4. The display panel according to claim 1, characterized in that: The cross section of the second portion is a trapezoid in a direction perpendicular to the plane where the substrate is located; Preferably, the orthographic projection area of ​​the surface of the second part facing away from the substrate on the substrate is smaller than the orthographic projection area of ​​the surface of the second part close to the substrate on the substrate; Preferably, the partition edge is a periphery of a surface of the second portion close to the substrate.

5. The display panel according to claim 1, characterized in that: In a direction perpendicular to the plane where the substrate is located, the cross section of the first portion is a trapezoid; Preferably, an orthographic projection area of ​​a surface of the first portion facing away from the substrate on the substrate is smaller than an orthographic projection area of ​​a surface of the second portion close to the substrate on the substrate.

6. The display panel according to claim 1, characterized in that: The first portion includes a single-layer metal structure; Or, the first portion includes a multi-layer metal structure, and an edge of the first electrode overlaps the metal structure; Preferably, the first portion comprises aluminum; Preferably, the first portion comprises a first sub-portion and a second sub-portion which are stacked, the second sub-portion being arranged on a side of the first sub-portion away from the substrate, the first sub-portion comprising molybdenum and / or titanium, and the second sub-portion comprising aluminum.

7. The display panel according to claim 1, characterized in that: The display panel further comprises a pixel definition layer disposed between the substrate and the isolation structure, the pixel definition layer comprising a pixel opening, the orthographic projection of the pixel opening on the substrate being within the orthographic projection range of the defining opening on the substrate; Preferably, the isolation structure is arranged on a side of the pixel definition layer away from the substrate, and the light-emitting functional layer is at least partially arranged in the pixel opening; Preferably, the display panel further comprises a first encapsulation layer, wherein the first encapsulation layer covers a side of the first electrode facing away from the substrate.

8. A method for preparing a display panel, characterized in that: The following steps are involved: providing a substrate; An isolation structure is formed on one side of the substrate, the isolation structure encloses a plurality of defined openings, the defined openings include a plurality of first openings and a plurality of second openings, the isolation structure includes a first portion and a second portion which are stacked, the first portion is arranged on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate, the second portion includes a partition edge, the orthographic projection of the partition edge on the substrate is located at the edge of the orthographic projection of the second portion on the substrate, and the partition edge includes a first edge defining the first opening and a second edge defining the second opening; forming a light-emitting functional layer and a first electrode, wherein the light-emitting functional layer includes a first light-emitting portion and a second light-emitting portion, wherein at least a portion of the first light-emitting portion is disposed in the first opening, and at least a portion of the second light-emitting portion is disposed in the second opening; The first electrode is located on a side of the light-emitting functional layer facing away from the substrate, an edge of the first electrode overlaps the side of the first part facing the limited opening, the multiple first electrodes include a first electrode portion arranged on one side of the first light-emitting portion and a second electrode portion arranged on one side of the second light-emitting portion, the shortest line between the edge of the first electrode portion and the first edge is a first line, the shortest line between the edge of the second electrode portion and the second edge is a second line, and an angle between the second line and the plane where the substrate is located is smaller than an angle between the first line and the plane where the substrate is located.

9. The method for preparing a display panel according to claim 8, characterized in that: The forming of the light-emitting functional layer and the first electrode comprises: A first luminescent material is arranged in each of the defined openings, and a first conductive material is evaporated at a first evaporation angle, wherein the first conductive material is stacked on one side of the first luminescent material; Removing the first light-emitting material and the first conductive material in the second opening, so that the second electrode is exposed from the defined opening, and the second electrode is located on a side of the light-emitting functional layer close to the substrate; A second luminescent material is arranged in each of the defined openings, and a second conductive material is evaporated at a second evaporation angle, wherein the second conductive material is stacked on one side of the second luminescent material, and the first evaporation angle is smaller than the second evaporation angle; The second light emitting material and the second conductive material in the first opening are removed.

10. A display device, characterized in that: A display panel comprising the display panel according to any one of claims 1 to 7, or a display panel prepared by the method for preparing a display panel according to any one of claims 8 to 9.

Images