Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the isolation structure is located on one side of the substrate, a plurality of isolation openings are defined by the isolation structure, and each isolation opening is provided with a first side and a second side which are oppositely arranged; the isolation structure comprises a first end face close to the substrate and a second end face away from the substrate, and in the section perpendicular to the direction of the substrate, the included angle between the connecting line of the edge of the second end face on the first side and the edge of the first end face on the first side and the first end face is a first blocking angle. An included angle between a connecting line of the edge of the second end face on the second side and the edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is larger than the first blocking angle; the light-emitting units are located in the isolation openings, each light-emitting unit comprises a light-emitting function unit and a first electrode, at least part of the light-emitting function units and the isolation structures are arranged at intervals, and the first electrodes are electrically connected with the isolation structures. According to the technical scheme, leakage can be improved.

Description

Technical Field

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

[0002] With the development of display technology, organic light-emitting diodes (OLED) have become one of the commonly used display screens for electronic devices such as mobile phones, tablets, smart TVs, and smart wearable devices due to their advantages of low power consumption, high brightness, wide viewing angle, and high contrast.

[0003] However, due to the limitations of its structure and its manufacturing process, the current display panel still has some technical problems when in use. Summary of the invention

[0004] In order to solve the above problems, embodiments of the present application provide a display panel and a method for manufacturing the same, and a display device.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate; an isolation structure, located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation opening having a first side and a second side arranged opposite to each other; the isolation structure comprising a first end face close to the substrate and a second end face away from the substrate, in a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face on the first side and a line connecting an edge of the first end face on the first side and the first end face is a first blocking angle, an angle between an edge of the second end face on the second side and a line connecting an edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; a plurality of light-emitting units, the light-emitting units being located in the isolation openings, the light-emitting units comprising light-emitting functional units and a first electrode arranged in sequence stacked in a direction away from the substrate, in the isolation openings, at least some of the light-emitting functional units are spaced apart from the isolation structure, and the first electrode is electrically connected to the isolation structure.

[0006] In combination with the first aspect, the multiple isolation openings include a first isolation opening and a second isolation opening arranged alternately in sequence along the first direction, the first isolation opening has a first sub-side and a second sub-side arranged opposite to each other along the first direction, the second isolation opening has a third sub-side and a fourth sub-side arranged opposite to each other along the first direction, and along a cross section perpendicular to the substrate direction, an angle between an edge of the second end face on the first sub-side and a line connecting the edge of the first end face on the first sub-side and the first end face is a first blocking angle, and an angle between an edge of the second end face on the second sub-side and a line connecting the edge of the first end face on the second sub-side and the first end face is a second blocking angle; along a cross section perpendicular to the substrate direction, an angle between an edge of the second end face on the third sub-side and a line connecting the edge of the first end face on the third sub-side and the first end face is a second blocking angle, and an angle between an edge of the second end face on the fourth sub-side and the first end face is a second blocking angle. The angle between the line connecting the edge of one end face at the fourth sub-side and the first end face is the first blocking angle; preferably, in the first isolation opening, the first electrode and the isolation structure overlap on the first sub-side and do not overlap on the second sub-side, and in the second isolation opening, the first electrode and the isolation structure overlap on the fourth sub-side and do not overlap on the third sub-side; preferably, the multiple light-emitting units include a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, the first light-emitting unit and the third light-emitting unit are located in the first isolation opening, and the second light-emitting unit is located in the second isolation opening, or, the first light-emitting unit and the third light-emitting unit are located in the second isolation opening, and the second light-emitting unit is located in the first isolation opening; preferably, the first light-emitting unit includes a red light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a blue light-emitting unit.

[0007] In combination with the first aspect, the isolation structure includes a first portion and a second portion stacked in sequence in a direction away from the substrate, the isolation structure includes a first partition portion and a second partition portion alternately arranged in sequence along the first direction, the first partition portion and the second partition portion are symmetrically arranged about the isolation opening, the orthographic projection of the second portion of the first partition portion on the substrate is located within the orthographic projection of the first portion of the first partition portion on the substrate, and the orthographic projection of the second portion of the second partition portion on the substrate covers the orthographic projection of the first portion of the second partition portion on the substrate; preferably, in a cross section perpendicular to the substrate, the shape of the first partition portion is a regular trapezoid, and the shape of the second partition portion is a T-shaped or I-shaped. font; preferably, the projection width of the first part of the first partition part on the substrate is greater than the projection width of the first part of the second partition part on the substrate; the projection width of the second part of the first partition part on the substrate is the same as the projection width of the second part of the second partition part on the substrate; preferably, the isolation structure also includes a third part, the third part is located on the side of the first part close to the substrate, and the orthographic projection of the third part on the substrate covers the orthographic projection of the first part on the substrate; preferably, the material of the first part includes aluminum, the material of the second part includes titanium, and the material of the third part includes molybdenum; preferably, the first electrode overlaps the first partition part, and the first electrode and the second partition part are spaced apart.

[0008] In combination with the first aspect, a plurality of isolation openings are arranged in sequence along a first direction; the isolation structure comprises a first part and a second part which are stacked in sequence along a direction away from the substrate, the isolation structure comprises a plurality of third partition parts arranged in the first direction, two adjacent third partition parts are symmetrically arranged about the isolation opening, the orthographic projection of the edge of the second part of at least part of the third partition parts close to the first side on the substrate is located within the orthographic projection of the first part of the third partition part on the substrate, and the orthographic projection of the edge of the second part of at least part of the third partition parts close to the second side on the substrate is located outside the orthographic projection of the first part of the third partition part on the substrate; preferably, the isolation structure also comprises a third part, the third part is located on the side of the first part close to the substrate, and the orthographic projection of the third part on the substrate covers the orthographic projection of the first part on the substrate; preferably, the material of the first part comprises aluminum, the material of the second part comprises titanium, and the material of the third part comprises molybdenum.

[0009] In combination with the first aspect, the first electrode and the isolation structure overlap on the first side and do not overlap on the second side; preferably, the first side and the second side are arranged opposite to each other along the first direction; the isolation opening further has a third side and a fourth side arranged opposite to each other along the second direction, and the first direction and the second direction are perpendicular; on a cross section perpendicular to the substrate direction, an angle between a line connecting at least a portion of an edge of the second end face located on the third side and at least a portion of an edge of the first end face located on the third side and the first end face is a second blocking angle; an angle between a line connecting at least a portion of an edge of the second end face located on the fourth side and at least a portion of an edge of the first end face located on the fourth side and the first end face is a second blocking angle; preferably, on a cross section perpendicular to the substrate direction, On the cross-section, the angle between the line connecting the partial edge of the second end face on the third side and the partial edge of the first end face on the third side and the first end face is the first blocking angle; the angle between the line connecting the partial edge of the second end face on the third side and the partial edge of the first end face on the third side and the first end face is the second blocking angle; the angle between the line connecting the partial edge of the second end face on the fourth side and the partial edge of the first end face on the fourth side and the first end face is the first blocking angle, and the angle between the line connecting the partial edge of the second end face on the fourth side and the partial edge of the first end face on the fourth side and the first end face is the second blocking angle; preferably, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle.

[0010] In combination with the first aspect, the light-emitting functional unit includes a first transmission layer, a light-emitting layer and a second transmission layer which are sequentially stacked in a direction away from the substrate; preferably, the first transmission layer includes a hole transmission layer, and the second transmission layer includes an electron transmission layer; preferably, the first transmission layer is spaced apart from the isolation structure; preferably, the display panel also includes a pixel definition layer, which is located between the substrate and the isolation structure, and the pixel definition layer encloses a plurality of pixel openings, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate; preferably, the light-emitting unit also includes a second electrode, which is located between the substrate and the pixel definition layer, and the pixel opening exposes part of the second electrode; preferably, the display panel also includes a first encapsulation layer, which is at least located on the side of the light-emitting unit away from the substrate, and the first encapsulation layer includes a plurality of spaced encapsulation units, which correspond to the light-emitting units, and the orthographic projection of the encapsulation unit on the substrate covers the orthographic projection of the light-emitting unit on the substrate; preferably, the display panel also includes a second encapsulation layer and a third encapsulation layer which are sequentially stacked in a direction away from the substrate, and the second encapsulation layer and the third encapsulation layer are located on the side of the first encapsulation layer away from the substrate; preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the materials of the second encapsulation layer include organic materials.

[0011] In the second aspect, an embodiment of the present application provides a display panel, comprising: a substrate; an isolation structure, located on one side of the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprising a first portion and a second portion stacked in sequence in a direction away from the substrate, the isolation structure comprising a first partition portion and a second partition portion symmetrically arranged about the isolation opening, the second portion of the first partition portion and the first step of the first partition portion having a first spacing between the positive projection edge on the substrate, the second portion of the second partition portion and the first step of the second partition portion having a second spacing between the positive pressure edge on the substrate, the second spacing being greater than the first spacing; a plurality of light-emitting units, the light-emitting units being located in the isolation openings, the light-emitting units comprising a light-emitting functional unit and a first electrode stacked in sequence in a direction away from the substrate, in the isolation openings, at least some of the light-emitting functional units being spaced apart from the second partition portion, and the first electrode being in contact and connected with the first partition portion.

[0012] In combination with the second aspect, in a cross section perpendicular to the direction of the substrate, the shape of the first partition portion is a right trapezoid, and the shape of the second partition portion is a T-shape or an I-shape; preferably, the projection width of the first portion of the first partition portion on the substrate is different from the projection width of the first portion of the second partition portion on the substrate; the projection width of the second portion of the first partition portion on the substrate is the same as the projection width of the second portion of the second partition portion on the substrate; preferably, the isolation structure also includes a third portion, the third portion is located on the side of the first portion close to the substrate, and the orthographic projection of the third portion on the substrate covers the orthographic projection of the first portion on the substrate; preferably, the light-emitting functional unit includes a first transmission layer, a light-emitting layer and a second transmission layer which are sequentially stacked in a direction away from the substrate; preferably, the first transmission layer includes a hole transmission layer, and the second transmission layer includes an electron transmission layer; preferably, the first transmission layer is spaced apart from the isolation structure.

[0013] In combination with the second aspect, the isolation structure has a first side and a second side arranged opposite to each other along a first direction, the isolation structure includes a first end face close to the substrate and a second end face away from the substrate, and in a cross section perpendicular to the substrate direction, an angle between an edge of the second end face on the first side and a line connecting the edge of the first end face on the first side and the first end face is a first blocking angle, an angle between an edge of the second end face on the second side and a line connecting the edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; preferably, the first electrode overlaps the isolation structure on the first side and does not overlap on the second side; preferably, the isolation opening further has a third side and a fourth side arranged opposite to each other along the second direction, the first direction and the second direction being perpendicular to each other; in a cross section perpendicular to the substrate direction, a line connecting at least a portion of an edge of the second end face located on the third side and at least a portion of an edge of the first end face located on the third side and the first end face are connected to each other. is the second blocking angle; the angle between the line connecting at least part of the edge of the second end face located on the fourth side and at least part of the edge of the first end face located on the fourth side and the first end face is the second blocking angle; preferably, along the cross section perpendicular to the substrate direction, the angle between the line connecting part of the edge of the second end face located on the third side and part of the edge of the first end face located on the third side and the first end face is the first blocking angle, and the angle between the line connecting part of the edge of the second end face located on the third side and part of the edge of the first end face located on the third side and the first end face is the second blocking angle; the angle between the line connecting part of the edge of the second end face located on the fourth side and part of the edge of the first end face located on the fourth side and the first end face is the first blocking angle; the angle between the line connecting part of the edge of the second end face located on the fourth side and part of the edge of the first end face located on the fourth side and the first end face is the second blocking angle; preferably, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle.

[0014] In a third aspect, an embodiment of the present application provides a method for preparing a display panel, comprising: preparing a plurality of second electrodes on a substrate; preparing an isolation structure on a side of the second electrode facing away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation openings having a first side and a second side that are relatively arranged; the isolation structure comprising a first end face close to the substrate and a second end face away from the substrate, and in a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face on the first side and a line connecting an edge of the first end face on the first side and the first end face is a first blocking angle, and an angle between an edge of the second end face on the second side and a line connecting an edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; adjusting the evaporation angle of the evaporation source, evaporating the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units, wherein at least some of the light-emitting functional units are spaced apart from the isolation structure; adjusting the evaporation angle of the evaporation source, evaporating the material of the first electrode to obtain a plurality of first electrodes, the first electrode is electrically connected to the isolation structure, and the second electrode, the light-emitting functional unit and the first electrode constitute a light-emitting unit.

[0015] In combination with the third aspect, an isolation structure is prepared on a side of the second electrode facing away from the substrate, comprising: sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate; performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure, wherein the intermediate structure comprises a first sub-intermediate structure and a second sub-intermediate structure arranged alternately in sequence along a first direction; covering a surface of the first sub-intermediate structure facing away from the substrate with a photoresist; performing a second patterning process on the second sub-intermediate structure to obtain a second partition portion, wherein the second partition portion is in a T-shaped or I-shaped shape on a cross section perpendicular to the substrate direction; removing the photoresist to obtain the first isolation portion. The first partition portion is in a right trapezoidal shape on a cross section perpendicular to the substrate direction, wherein the first partition portion and the second partition portion enclose an isolation opening, the isolation opening comprises a first isolation opening and a second isolation opening, the first isolation opening and the second isolation opening are arranged alternately in sequence along the first direction, the first isolation opening comprises a first sub-side and a second sub-side arranged opposite to each other along the first direction, the second isolation opening comprises a third sub-side and a fourth sub-side arranged opposite to each other along the first direction, and in a cross section perpendicular to the substrate direction, an angle between a line connecting an edge of the second end face at the first sub-side and an edge of the first end face at the first sub-side and the first end face and the first end face is a first blocking angle, and the first blocking angle is a first blocking angle. The angle between the edge of the second end face at the second sub-side and the line connecting the edge of the first end face at the second sub-side and the first end face is the second blocking angle; along the cross section perpendicular to the substrate direction, the angle between the edge of the second end face at the third sub-side and the line connecting the edge of the first end face at the third sub-side and the first end face is the second blocking angle, and the angle between the edge of the second end face at the fourth sub-side and the line connecting the edge of the first end face at the fourth sub-side and the first end face is the first blocking angle; preferably, the first patterning process includes dry etching, and the second patterning process includes wet etching; preferably, the first conductive layer and the second conductive layer are subjected to the first patterning process to obtain an intermediate structure, comprising: The surface of the second conductive layer facing away from the substrate is covered with photoresist, and is exposed and developed to obtain a patterned photoresist; the first conductive layer and the second conductive layer not covered with the photoresist are subjected to a first patterning process to obtain an intermediate structure; preferably, before the step of sequentially preparing the first conductive layer and the second conductive layer on the side of the second electrode facing away from the substrate, the method further comprises: preparing a third conductive layer on the side of the second electrode facing away from the substrate; after the step of sequentially preparing the first conductive layer and the second conductive layer on the side of the second electrode facing away from the substrate, the method comprises: performing a first patterning process on the first conductive layer, the second conductive layer and the third conductive layer to obtain an intermediate structure.

[0016] In combination with the third aspect, an isolation structure is prepared on a side of the second electrode facing away from the substrate, comprising: sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate; performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure, wherein the intermediate structure comprises a plurality of third sub-intermediate structures arranged along a first direction; covering a portion of the surface of the third sub-intermediate structure facing away from the substrate with a photoresist; performing a second patterning process on a portion of the third sub-intermediate structure not covered with the photoresist; removing the photoresist to obtain a third partition portion, wherein two adjacent third partition portions enclose an isolation opening; preferably, the first patterning process comprises dry etching, and the second patterning process comprises wet etching; preferably, the first conductive layer and The second conductive layer is subjected to a first patterning treatment to obtain an intermediate structure, comprising: covering a surface of the second conductive layer facing away from the substrate with a photoresist, and performing exposure and development to obtain a patterned photoresist; performing a first patterning treatment on the first conductive layer and the second conductive layer not covered with the photoresist to obtain an intermediate structure; preferably, before the step of sequentially preparing the first conductive layer and the second conductive layer on a side of the second electrode facing away from the substrate, the method further comprises: preparing a third conductive layer on a side of the second electrode facing away from the substrate; after the step of sequentially preparing the first conductive layer and the second conductive layer on a side of the second electrode facing away from the substrate, the method comprises: performing a first patterning treatment on the first conductive layer, the second conductive layer and the third conductive layer to obtain an intermediate structure.

[0017] In combination with the third aspect, the deposition angle of the deposition source is adjusted to deposit the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units, including: adjusting the deposition angle of the deposition source so that the deposition source faces the second side; moving the deposition source along the first direction to deposit the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units; preferably, the deposition angle of the deposition source is adjusted to deposit the material of the first electrode to obtain a plurality of first electrodes, including: adjusting the deposition angle of the deposition source so that the deposition source faces the first side; moving the deposition source along the first direction to deposit the material of the first electrode to obtain a plurality of first electrodes; preferably, on the first side, the deposition angle of the first electrode is greater than the deposition angle of the light-emitting functional unit; on the second side, the deposition angle of the light-emitting functional unit is greater than the deposition angle of the first electrode.

[0018] In combination with the third aspect, before the step of preparing an isolation structure on a side of the second electrode facing away from the substrate, the method further includes: preparing a pixel definition layer on a side of the second electrode facing away from the substrate, the pixel definition layer enclosing a plurality of pixel openings, the orthographic projections of the pixel openings on the substrate being located within the orthographic projections of the isolation openings on the substrate, and the pixel openings exposing a portion of the second electrode; preferably, after adjusting the evaporation angle of the evaporation source and evaporating the material of the first electrode to obtain a plurality of first electrodes, the method further includes: preparing a first encapsulation layer on a side of the first electrode facing away from the substrate, the first encapsulation layer including a plurality of spaced encapsulation units, the encapsulation units corresponding to the light-emitting units, the orthographic projections of the encapsulation units on the substrate covering the orthographic projections of the light-emitting units on the substrate; preferably, after preparing the first encapsulation layer on a side of the first electrode facing away from the substrate, the method further includes: sequentially preparing a second encapsulation layer and a third encapsulation layer on a side of the first encapsulation layer facing away from the substrate.

[0019] In a fourth aspect, an embodiment of the present application provides a display device, including the above-mentioned display panel, or a method for preparing the above-mentioned display panel.

[0020] Through the above technical solution, the light-emitting functional unit and the isolation structure are spaced apart to avoid leakage and improve the display effect of the display panel. In addition, the first electrode is electrically connected to the isolation structure to ensure that the entire surface of the first electrode is turned on, the voltage drop is consistent, and the brightness uniformity of the display panel is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1a It is a schematic diagram of the cross-sectional structure of a display panel provided in one embodiment of the present application.

[0022] Figure 1b is a top view of an isolation opening provided in an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0028] Figure 7It is a schematic diagram of a process of manufacturing a display panel provided in one embodiment of the present application.

[0029] Figures 8a to 8h It is a schematic diagram of a method for preparing a display panel provided in one embodiment of the present application.

[0030] Fig. 9 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] When preparing a display panel, the functional film layer in the light-emitting unit needs to be formed by evaporation. When a fine metal mask (FMM) is used to evaporate the functional film layer, multiple alignments are required. In order to solve the position offset caused by the alignment error, sufficient space needs to be reserved between different light-emitting units. This makes the aperture ratio of the light-emitting unit low, making it difficult to increase the pixel density of the display panel.

[0033] In the present application, there is no need to use a mask, and a whole-surface evaporation process is adopted to separately evaporate and package light-emitting units of different colors (also called different sub-pixels). There is no need to consider the alignment accuracy during evaporation. Therefore, the gap between the light-emitting units can be designed to be smaller, thereby increasing the pixel density. In this method, an isolation structure is provided between adjacent light-emitting units, and the isolation structure can isolate adjacent light-emitting units. However, the inventors have found that when evaporating the light-emitting functional layer, the light-emitting functional layer will overlap the isolation structure. At this time, there is a leakage path from anode → hole transport layer → isolation structure. At low brightness, part of the current is transmitted from the leakage path, resulting in poor picture quality and affecting product performance.

[0034] In view of the above technical problems, the embodiment of the present application provides a display panel, which includes a substrate; an isolation structure, which is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings, and the isolation opening has a first side and a second side arranged oppositely; the isolation structure includes a first end face close to the substrate and a second end face away from the substrate, and along the cross section perpendicular to the substrate direction, the angle between the edge of the second end face on the first side and the line connecting the edge of the first end face on the first side and the first end face is a first blocking angle, and the angle between the edge of the second end face on the second side and the line connecting the edge of the first end face on the second side and the first end face is a second blocking angle; a plurality of light-emitting units, the light-emitting units are located in the isolation opening, and the light-emitting units include a light-emitting functional unit and a first electrode which are sequentially stacked in a direction away from the substrate, and in the isolation opening, the light-emitting functional unit is spaced apart from the isolation structure, and the first electrode is electrically connected to the isolation structure. In the embodiment of the present application, the light-emitting functional unit is not overlapped with the isolation structure, which can avoid leakage and improve the picture display effect of the display panel. In addition, the first electrode is electrically connected to the isolation structure, which can ensure that the entire surface of the first electrode is turned on, the voltage drop is consistent, and the brightness uniformity of the display panel is ensured.

[0035] The technical solution of the present application is described below through multiple embodiments. It should be understood that the following embodiments are only for illustrative purposes and are not intended to limit the protection scope of the present application.

[0036] Figure 1a is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present application. Figure 1a As shown, the display panel includes a substrate 10, a pixel definition layer 20, and a plurality of light emitting units 30 (for illustration, Figure 1a Only one light emitting unit 30 is shown in the figure, and it can be understood that the display panel includes multiple light emitting units 30) and an isolation structure 40.

[0037] In an embodiment of the present application, the substrate 10 includes a rigid substrate, such as a glass substrate; or, the substrate 10 includes a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.

[0038] The pixel definition layer 20 is located between the substrate 10 and the isolation structure 40. The pixel definition layer 20 encloses a plurality of pixel openings 201. The orthographic projection of the pixel opening 201 on the substrate 10 is located within the orthographic projection of the isolation opening 50 on the substrate 10. In the embodiment of the present application, the pixel definition layer 20 includes an organic material or an inorganic material, which is not limited in the present application.

[0039] The isolation structure 40 is located on one side of the substrate 10, and the isolation structure 40 encloses a plurality of isolation openings 50 (for illustration, Figure 1a Only one isolation opening 50 is shown in the figure, and it can be understood that the isolation structure 40 includes multiple isolation openings 50). In the embodiment of the present application, the shape of the isolation opening 50 includes a rectangle, a rhombus, a circle, a trapezoid, an ellipse, etc., which is not limited by the embodiment of the present application. The isolation opening 50 has a first side 511 and a second side 512 that are oppositely arranged. If the isolation opening 50 is a rectangle, the first side 511 and the second side 512 are two opposite sides of the rectangle. If the isolation opening 50 is a circle, the first side 511 and the second side 512 can be two arc sides that are oppositely arranged. Figure 1b FIG. 1 is a top view of an isolation opening provided in an embodiment of the present application. Figure 1b In the description, the isolation opening 50 is a rectangular shape. The isolation opening 50 has a first direction (i.e. Figure 1b The first side 511 and the second side 512 are arranged opposite to each other along the x direction in the direction of the axis, and the Figure 1b The third side 513 and the fourth side 514 are arranged opposite to each other (in the y direction).

[0040] In the embodiment of the present application, the isolation structure 40 includes a first end surface 401 close to the substrate 10 and a second end surface 402 away from the substrate 10. Figure 1a On a cross section (in the z direction in the middle), an angle α1 between an edge of the second end face 402 on the first side 511 and a line connecting the edge of the first end face 401 on the first side 511 and the first end face 401 is a first blocking angle, and an angle α2 between an edge of the second end face 402 on the second side 512 and a line connecting the edge of the first end face 401 on the second side 512 and the first end face 401 is a second blocking angle. The second blocking angle is greater than the first blocking angle. Exemplarily, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle. In this way, when evaporating the light-emitting functional material, the evaporation source is controlled to be directed toward the second side 512, and the light-emitting functional material will not be evaporated onto the isolation structure 40 located on the first side 511; in addition, due to the obstruction of the second end face 402, the light-emitting functional material will not be evaporated onto the isolation structure 40 located on the second side 512, that is, this structure is conducive to preventing the light-emitting functional material from being evaporated onto the isolation structure, thereby avoiding leakage. In an embodiment of the present application, along a direction perpendicular to the substrate 10 (that is Figure 1aIn a cross section (z direction in the middle), the angle between the line connecting at least a portion of the edge of the second end face 402 located on the third side 513 and at least a portion of the edge of the first end face 401 located on the third side 513 and the first end face 401 is a second blocking angle. In the embodiment of the present application, “at least a portion of the edge located on the third side 513” includes a portion of the edge located on the third side 513 and all of the edges located on the third side 513. The angle between the line connecting at least a portion of the edge of the second end face 402 located on the fourth side 514 and at least a portion of the edge of the first end face 401 located on the fourth side 514 and the first end face 401 is a second blocking angle. In the embodiment of the present application, the angle between the line connecting at least a portion of the edge of the second end face 402 located on the fourth side 514 and at least a portion of the edge of the first end face 401 located on the fourth side 514 and the first end face 401 is a second blocking angle. Figure 1a On the cross section (z direction in the middle), the angle between the line connecting the partial edge of the second end face 402 located on the third side 513 and the partial edge of the first end face 401 located on the third side 513 and the first end face 401 is the first blocking angle; the angle between the line connecting the partial edge of the second end face 402 located on the third side 513 and the partial edge of the first end face 401 located on the third side 513 and the first end face 401 is the second blocking angle; the angle between the line connecting the partial edge of the second end face 402 located on the fourth side 514 and the partial edge of the first end face 401 located on the fourth side 514 and the first end face 401 is the first blocking angle; the angle between the line connecting the partial edge of the second end face 402 located on the fourth side 514 and the partial edge of the first end face 401 located on the fourth side 514 and the first end face 401 is the second blocking angle. In this way, on the third side 513 and the fourth side 514, the light-emitting functional material cannot be evaporated onto the isolation structure 40, thereby better avoiding leakage.

[0041] The isolation structure 40 includes a first portion 411 and a second portion 412 which are stacked in sequence in a direction away from the substrate 10. The material of the first portion 411 includes aluminum, and the material of the second portion 412 includes titanium. Figure 1a The isolation structure 40 shown. Optionally, as Figure 2 As shown, the isolation structure 40 further includes a third portion 413, which is located on the side of the first portion 411 close to the substrate 10, and the orthographic projection of the third portion 413 on the substrate 10 covers the orthographic projection of the first portion 411 on the substrate. Optionally, the material of the third portion 413 includes molybdenum.

[0042] The light-emitting unit 30 is located in the isolation opening 50, and the light-emitting unit 30 includes a second electrode 310, a light-emitting functional unit 320 and a first electrode 330 which are sequentially stacked in a direction away from the substrate. The second electrode 310 is located between the substrate 10 and the pixel definition layer 20, and the pixel opening 201 exposes a portion of the second electrode 310. In the embodiment of the present application, the first electrode 330 includes an anode, and the second electrode 310 includes a cathode; or, the first electrode 330 includes a cathode, and the second electrode 310 includes an anode. The light-emitting functional unit 320 includes a first transmission layer, a light-emitting layer, and a second transmission layer which are sequentially stacked in a direction away from the substrate 10. Optionally, the first transmission layer includes a hole transmission layer, and the second transmission layer includes an electron transmission layer. In the embodiment of the present application, in the isolation opening 50, the light-emitting functional unit 320 is spaced apart from the isolation structure 40. Preferably, the first transmission layer is spaced apart from the isolation structure 40. The first electrode 330 is electrically connected to the isolation structure 40. Specifically, the first electrode 330 overlaps the isolation structure 40 on the first side 511 and does not overlap on the second side 512. In the embodiment of the present application, the orthographic projection of the first electrode 330 on the substrate 10 does not completely cover the orthographic projection of the light-emitting functional unit 320 on the substrate 10. Optionally, in some embodiments, the orthographic projection of the first electrode 330 on the substrate 10 covers the orthographic projection of the light-emitting functional unit 320 on the substrate 10, which is not limited by the embodiment of the present application. In the embodiment of the present application, the light-emitting functional unit 320 is not overlapped with the isolation structure 40, which can avoid leakage and improve the picture display effect of the display panel. In addition, the first electrode 330 overlaps the isolation structure 40 to ensure that the entire surface of the first electrode 330 is turned on, ensure consistent voltage drop, and ensure uniform brightness of the display panel.

[0043] Figure 3 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 3 The difference between the display panel shown in FIG. 1 and the display panel shown in FIG. 1 is that the plurality of isolation openings 50 include a plurality of first isolation openings 51 and a plurality of second isolation openings 52. Figure 2 The first isolation opening 51 and the second isolation opening 52 are arranged alternately in sequence. The first isolation opening 51 has a first sub-side 5111 and a second sub-side 5121 arranged opposite to each other along the first direction. Figure 3In a cross section (in the z direction in FIG. 1 ), an angle α1 between a line connecting an edge of the second end face 402 on the first sub-side 5111 and an edge of the first end face 401 on the first sub-side 5111 and the first end face 401 is a first blocking angle, and an angle α2 between a line connecting an edge of the second end face 402 on the second sub-side 5121 and an edge of the first end face 401 on the second sub-side 5121 and the first end face 401 is a second blocking angle. The second isolation opening 52 has a third sub-side 5122 and a fourth sub-side 5112 that are oppositely disposed along the first direction. In the cross section perpendicular to the substrate 10, the angle α3 between the line connecting the edge of the second end face 402 at the third sub-side 5122 and the edge of the first end face 401 at the third sub-side 5122 and the first end face 401 is the second blocking angle, and the angle α4 between the line connecting the edge of the second end face 402 at the fourth sub-side 5112 and the edge of the first end face 401 at the fourth sub-side 5112 and the first end face 401 is the first blocking angle. In the first isolation opening 51, the first electrode 330 overlaps with the isolation structure 40 at the first sub-side 5111 and does not overlap at the second sub-side 5121. In the second isolation opening 52, the first electrode 330 overlaps with the isolation structure 40 at the fourth sub-side 5112 and does not overlap at the third sub-side 5122.

[0044] In the embodiment of the present application, the isolation structure 40 includes a third portion 413, a first portion 411, and a second portion 412 which are sequentially stacked in a direction away from the substrate. The isolation structure 40 includes a first partition portion 41 and a second partition portion 42 which are alternately arranged in sequence along the first direction, and the first partition portion 41 and the second partition portion 42 are symmetrically arranged about the isolation opening 50 (or the first isolation opening 51, or the second isolation opening 52). The orthographic projection of the second portion 412 of the first partition portion 41 on the substrate 10 is located within the orthographic projection of the first portion 411 of the first partition portion 41 on the substrate 10, and the orthographic projection of the second portion 412 of the second partition portion 42 on the substrate 10 covers the orthographic projection of the first portion 411 of the second partition portion 42 on the substrate 10. Optionally, in a cross section perpendicular to the direction of the substrate 10, the shape of the first partition portion 41 is a regular trapezoid, and the shape of the second partition portion 42 is a T-shaped or I-shaped. Optionally, the projection width of the first portion 411 of the first partition portion 41 on the substrate 10 is different from the projection width of the first portion 411 of the second partition portion 42 on the substrate 10; the projection width of the second portion 412 of the first partition portion 41 on the substrate 10 is the same as the projection width of the second portion 412 of the second partition portion 42 on the substrate 10. In the embodiment of the present application, the first electrode 330 overlaps the first partition portion 41, and the first electrode 330 is spaced apart from the second partition portion 42. In the embodiment of the present application, the shapes of the first partition portion 41 and the second partition portion 42 are different, and the shapes of the openings of two adjacent pixels are different. When evaporating different light-emitting functional units, the evaporation angle of the evaporation source can be adjusted to achieve that the light-emitting functional unit 320 does not overlap the isolation structure 40, and the first electrode 330 overlaps the isolation structure 40. In order to ensure that the evaporation angles of the light-emitting units of the same color are the same, optionally, the plurality of light-emitting units 30 include a first light-emitting unit 31, a second light-emitting unit 32, and a third light-emitting unit 33, the first light-emitting unit 31 and the third light-emitting unit 33 are located in the first isolation opening 51, and the second light-emitting unit 32 is located in the second isolation opening 52. Alternatively, in other embodiments, the first light-emitting unit 31 and the third light-emitting unit 33 are located in the second isolation opening 52, and the second light-emitting unit 32 is located in the first isolation opening 51. In an embodiment of the present application, the first light-emitting unit includes a red light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a blue light-emitting unit. Exemplarily, the pixel arrangement is an RGBG arrangement.

[0045] Figure 4 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 4 The display panel shown is Figure 3The difference of the display panel shown is that the display panel further includes an encapsulation layer 60. The encapsulation layer 60 includes a first encapsulation layer 610, a second encapsulation layer 620, and a third encapsulation layer 630 which are sequentially stacked in a direction away from the substrate 10. The first encapsulation layer 610 is located on the side of the light-emitting unit 30 away from the substrate 10, and the first encapsulation layer 610 includes a plurality of encapsulation units arranged at intervals, the encapsulation units correspond to the light-emitting units 30, and the orthographic projection of the encapsulation units on the substrate 10 covers the orthographic projection of the light-emitting unit 30 on the substrate 10. In the embodiment of the present application, the materials of the first encapsulation layer 610 and the third encapsulation layer 630 include inorganic materials, and the material of the second encapsulation layer 620 includes organic materials.

[0046] Figure 5 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application. Figure 5 As shown, a plurality of isolation openings 50 are arranged along a first direction (ie Figure 5 The isolation structure 40 includes a third portion 413, a first portion 411, and a second portion 412 which are stacked in a direction away from the substrate. The isolation structure 40 includes a plurality of third partition portions 43 arranged along the first direction, and two adjacent third partition portions 43 are symmetrically arranged about the isolation opening. The orthographic projection of the edge of the second portion 412 of at least part of the third partition portion 43 close to the first side 511 on the substrate 10 is located within the orthographic projection of the first portion 411 of the third partition portion 43 on the substrate 10, and the orthographic projection of the edge of the second portion 412 of at least part of the third partition portion close to the second side 512 on the substrate 10 is located outside the orthographic projection of the first portion 411 of the third partition portion 43 on the substrate 10. That is, the portion of the third partition portion 43 close to the first side 511 belongs to a regular trapezoidal partial structure, and the portion of the third partition portion 43 close to the second side 512 belongs to a T-shaped or I-shaped partial structure. In the embodiment of the present application, the light-emitting functional unit 320 and the isolation structure 40 are spaced apart (i.e., the two are not overlapped), and the first electrode 330 and the isolation structure 40 overlap on the first side 511 and do not overlap on the second side 512. In this way, on the one hand, leakage current can be improved to ensure the picture display effect of the display panel; on the other hand, the first electrode 330 (cathode) is ensured to be fully conductive and the brightness of the display panel is uniform.

[0047] Figure 6 is a schematic diagram of a cross-sectional structure of a display panel provided in another embodiment of the present application, Figure 6 The display panel shown is Figure 5The difference of the display panel shown is that the display panel further includes an encapsulation layer 60. The encapsulation layer 60 includes a first encapsulation layer 610, a second encapsulation layer 620, and a third encapsulation layer 630 which are sequentially stacked in a direction away from the substrate 10. The first encapsulation layer 610 is located on the side of the light-emitting unit 30 away from the substrate 10, and the first encapsulation layer 610 includes a plurality of encapsulation units arranged at intervals, the encapsulation units correspond to the light-emitting units 30, and the orthographic projection of the encapsulation units on the substrate 10 covers the orthographic projection of the light-emitting unit 30 on the substrate 10. In the embodiment of the present application, the materials of the first encapsulation layer 610 and the third encapsulation layer 630 include inorganic materials, and the material of the second encapsulation layer 620 includes organic materials.

[0048] In a second aspect, the present application also provides a display panel. Figure 3 As shown, the display panel includes a substrate 10; an isolation structure 40, which is located on one side of the substrate 10, and the isolation structure 40 encloses a plurality of isolation openings 50. The isolation structure 40 includes a first portion 411 and a second portion 412 which are sequentially stacked in a direction away from the substrate 10, and the isolation structure includes a first partition portion 41 and a second partition portion 42 which are symmetrically arranged about the isolation opening 50, and a first spacing H1 is formed between the second portion 412 of the first partition portion 41 and the first portion 411 of the first partition portion 41 and the orthographic projection edge on the substrate 10, and the second partition portion 41 is disposed on the substrate 10. 2 and the first part 411 of the second partition part 42 have a second spacing H2 between the edges of the orthographic projection on the substrate 10, and the second spacing H2 is greater than the first spacing H1; a plurality of light-emitting units 30, the light-emitting units are located in the isolation opening 50, and the light-emitting units 30 include light-emitting functional units 320 and first electrodes 330 that are sequentially stacked in a direction away from the substrate 10, and in the isolation opening 50, at least part of the light-emitting functional units 320 are spaced apart from the second partition part 42, and the first electrode 330 is in contact with and connected to the first partition part 41. In the embodiment of the present application, the light-emitting functional unit 320 is not overlapped to the isolation structure 40, which can avoid leakage and improve the picture display effect of the display panel. In addition, the single-sided overlap of the first electrode 330 can ensure that the entire surface of the first electrode is turned on, ensure the voltage drop is consistent, and ensure the brightness uniformity of the display panel.

[0049] Optionally, in a cross section perpendicular to the direction of the substrate 10, the shape of the first partition portion 41 is a right trapezoid, and the shape of the second partition portion 42 is a T-shape or an I-shape; preferably, the projection width of the first portion 411 of the first partition portion 41 on the substrate 10 is different from the projection width of the first portion 411 of the second partition portion 42 on the substrate 10; the projection width of the second portion 412 of the first partition portion 41 on the substrate 10 is the same as the projection width of the second portion 412 of the second partition portion 42 on the substrate 10; preferably, the isolation structure 40 also includes a third portion 413, the third portion 413 is located on the side of the first portion 411 close to the substrate 10, and the orthographic projection of the third portion 413 on the substrate 10 covers the orthographic projection of the first portion 411 on the substrate 10; preferably, the light-emitting functional unit 320 includes a first transmission layer, a light-emitting layer and a second transmission layer which are sequentially stacked in a direction away from the substrate; preferably, the first transmission layer includes a hole transmission layer, and the second transmission layer includes an electron transmission layer; preferably, the first transmission layer and the isolation structure 40 are spaced apart.

[0050] Optionally, the isolation structure 40 has a first direction (ie Figure 3 The first side 511 and the second side 512 are relatively arranged (in the x direction in ... Figure 1bThe third side 513 and the fourth side 514 are relatively arranged in the y direction in the substrate 10, and the first direction and the second direction are perpendicular; along the cross section perpendicular to the direction of the substrate 10, the angle between the line connecting at least part of the edge of the second end face 402 located on the third side 513 and at least part of the edge of the first end face 401 located on the third side 513 and the first end face 401 is a second blocking angle; the angle between the line connecting at least part of the edge of the second end face 402 located on the fourth side 514 and at least part of the edge of the first end face 401 located on the fourth side 514 and the first end face 401 is a second blocking angle; preferably, along the cross section perpendicular to the direction of the substrate 10, the angle between the second end face 402 located on part of the edge of the third side 513 and the first end face 401 located on the third side The angle between the line connecting the partial edge of the second end face 402 located on the third side 513 and the first end face 401 is the first blocking angle, and the angle between the line connecting the partial edge of the second end face 402 located on the third side 513 and the partial edge of the first end face 401 located on the third side 513 and the first end face 401 is the second blocking angle; the angle between the line connecting the partial edge of the second end face 402 located on the fourth side 514 and the partial edge of the first end face 401 located on the fourth side 514 and the first end face 401 is the first blocking angle, and the angle between the line connecting the partial edge of the second end face 402 located on the fourth side 514 and the partial edge of the first end face 401 located on the fourth side 514 and the first end face 401 is the second blocking angle; preferably, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle.

[0051] In a third aspect, an embodiment of the present application further provides a method for preparing a display panel, which is used to prepare the display panel in the above embodiment.

[0052] Figure 7 It is a schematic diagram of a process of manufacturing a display panel provided in one embodiment of the present application. Figures 8a to 8h It is a schematic diagram of a method for preparing a display panel provided in one embodiment of the present application. Figures 8a to 8h Only the case where the display panel includes three pixel openings is shown, and it can be understood that the display panel includes multiple pixel openings. Figure 7 and Figure 8a to Figure 8h The content shown is an exemplary introduction to the method for preparing the display panel provided in the embodiment of the present application. Figure 7 As shown, the method includes the following steps.

[0053] Step S710, preparing a plurality of second electrodes on a substrate.

[0054] like Figure 8a As shown, a plurality of second electrodes 310 are prepared on the substrate 10 .

[0055] Step S720: preparing an isolation structure on a side of the second electrode facing away from the substrate.

[0056] Optionally, to obtain Figure 3The isolation structure shown in the figure comprises the following steps for preparing the isolation structure on the side of the second electrode facing away from the substrate. First, a first conductive layer and a second conductive layer are sequentially prepared on the side of the second electrode facing away from the substrate; the first conductive layer and the second conductive layer are subjected to a first patterning process to obtain an intermediate structure. The intermediate structure comprises a first sub-intermediate structure and a second sub-intermediate structure arranged alternately in sequence along a first direction. Specifically, a photoresist is covered on the surface of the second conductive layer facing away from the substrate, and exposure and development are performed to obtain a patterned photoresist; the first conductive layer and the second conductive layer not covered with the photoresist are subjected to a first patterning process to obtain an intermediate structure. In an embodiment of the present application, the first patterning process comprises dry etching. Then, a photoresist is covered on the surface of the first sub-intermediate structure facing away from the substrate; the second sub-intermediate structure is subjected to a second patterning process to obtain a second partition portion. The second patterning process comprises wet etching. On a cross section perpendicular to the direction of the substrate, the shape of the second partition portion is a T-shaped or I-shaped shape. Finally, the photoresist is removed to obtain the first partition portion. On a cross section perpendicular to the direction of the substrate, the shape of the first partition portion is a regular trapezoid. Wherein, the first partition part and the second partition part enclose an isolation opening. The isolation opening includes a first isolation opening and a second isolation opening arranged alternately in sequence along the first direction, and the first isolation opening has a first sub-side and a second sub-side arranged oppositely along the first direction. The isolation structure includes a first end face close to the substrate and a second end face away from the substrate. In a cross section perpendicular to the substrate direction, the angle between the edge of the second end face on the first sub-side and the line connecting the edge of the first end face on the first sub-side and the first end face is a first blocking angle; the angle between the edge of the second end face on the second sub-side and the line connecting the edge of the first end face on the second sub-side and the first end face is a second blocking angle. The second isolation opening has a third sub-side and a fourth sub-side arranged oppositely along the first direction. In a cross section perpendicular to the substrate direction, the angle between the edge of the second end face on the third sub-side and the edge of the first end face on the third sub-side and the first end face is a second blocking angle; the angle between the edge of the second end face on the fourth sub-side and the line connecting the edge of the first end face on the fourth sub-side and the first end face is a first blocking angle. Wherein, the second blocking angle is greater than the first blocking angle.

[0057] Optionally, before the step of sequentially preparing the first conductive layer and the second conductive layer on the side of the second electrode facing away from the substrate, the method further includes: preparing a third conductive layer on the side of the second electrode facing away from the substrate. After the step of sequentially preparing the first conductive layer and the second conductive layer on the side of the second electrode facing away from the substrate, the method further includes: performing a first patterning process on the first conductive layer, the second conductive layer and the third conductive layer to obtain an intermediate structure.

[0058] Optionally, before the step of preparing the isolation structure on the side of the second electrode facing away from the substrate, the method further comprises: preparing a pixel definition layer on the side of the second electrode facing away from the substrate. The pixel definition layer encloses a plurality of pixel openings, the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the isolation openings on the substrate, and the pixel openings expose a portion of the second electrode.

[0059] For example, in order to obtain Figure 3 The isolation structure shown in the figure comprises the following steps. First, a pixel definition layer is prepared on the side of the second electrode facing away from the substrate. It should be noted that in the embodiment of the present application, after the isolation structure is prepared, the pixel definition layer is patterned to form a plurality of pixel openings. A third conductive layer 423, a first conductive layer 421, and a second conductive layer 422 are sequentially prepared on the side of the pixel definition layer 20 facing away from the substrate 10, as shown in FIG. Figure 8b The first conductive layer 421, the second conductive layer 422 and the third conductive layer 423 are subjected to a first patterning process to obtain an intermediate structure 44, as shown in FIG. Figure 8c As shown, the intermediate structure 44 includes first intermediate sub-structures 441 and second intermediate sub-structures 442 that are alternately arranged in sequence along the first direction. Figure 8d As shown, the surface of the first intermediate substructure 441 facing away from the substrate 10 is covered with a photoresist 70. The second intermediate substructure 442 is subjected to a second patterning process to obtain a second partitioning portion 42; the photoresist 70 is removed to obtain a first partitioning portion 41; the pixel definition layer 20 is subjected to a patterning process to obtain a plurality of pixel openings, and the pixel definition layer 20 is subjected to a patterning process to obtain a plurality of pixel openings, and the pixel definition layer 20 is subjected to a second patterning process to obtain a second partitioning portion 42; the second intermediate substructure 442 is subjected to a second patterning process to obtain a second partitioning portion 42; the photoresist 70 is removed to obtain a first partitioning portion 41; the pixel definition layer 20 is subjected to a patterning process to obtain a plurality of pixel openings, and the pixel definition layer 20 is subjected to a patterning process to obtain a plurality of pixel openings, and the pixel definition layer 20 is subjected to a patterning process to obtain a second partitioning portion 42; the second intermediate substructure 442 is subjected to a second patterning process to obtain a second partitioning portion 42; the second intermediate substructure 442 is subjected to a second patterning process to obtain a second partitioning portion 42; the second intermediate substructure 442 is subjected to a second patterning process to obtain a second partitioning portion 41 ... Figure 8e The structure shown.

[0060] In the embodiment of the present application, in order to obtain Figure 5 The isolation structure shown in the figure comprises the following steps of preparing the isolation structure on the side of the second electrode facing away from the substrate. A first conductive layer and a second conductive layer are sequentially prepared on the side of the second electrode facing away from the substrate; the first conductive layer and the second conductive layer are subjected to a first patterning process to obtain an intermediate structure. The intermediate structure comprises a plurality of third sub-intermediate structures arranged along a first direction. Then, a portion of the surface of the third sub-intermediate structure facing away from the substrate is covered with a photoresist; a portion of the third sub-intermediate structure not covered with the photoresist is subjected to a second patterning process; the photoresist is removed to obtain a third partition portion. Two adjacent third partition portions enclose an isolation opening. The isolation opening has a first side and a second side arranged oppositely along a first direction, and the isolation structure comprises a first end face close to the substrate and a second end face away from the substrate. On a cross section perpendicular to the substrate direction, the angle between the edge of the second end face on the first side and the line connecting the edge of the first end face on the first side and the first end face is a first blocking angle; the angle between the edge of the second end face on the second side and the line connecting the edge of the first end face on the second side and the first end face is a second blocking angle. Wherein, the second blocking angle is greater than the first blocking angle.

[0061] For example, in order to obtain Figure 5 The isolation structure shown in the figure comprises the following steps. First, a pixel definition layer is prepared on the side of the second electrode facing away from the substrate. It should be noted that in the embodiment of the present application, after the isolation structure is prepared, the pixel definition layer is patterned to form a plurality of pixel openings. A third conductive layer 423, a first conductive layer 421, and a second conductive layer 422 are sequentially prepared on the side of the pixel definition layer 20 facing away from the substrate 10, as shown in FIG. Figure 8b The first conductive layer 421, the second conductive layer 422 and the third conductive layer 423 are subjected to a first patterning process to obtain an intermediate structure 44, as shown in FIG. Figure 8f As shown, the intermediate structure 44 includes a plurality of third intermediate sub-structures 443 which are arranged alternately in sequence along the first direction. Figure 8g As shown, the surface of the third intermediate substructure 443 facing away from the substrate 10 is covered with a photoresist 70. The portion of the third intermediate substructure 443 not covered with the photoresist 70 is subjected to a second patterning process; the photoresist 70 is removed to obtain a third partition portion 43; the pixel definition layer 20 is subjected to a patterning process to obtain a plurality of pixel openings, and the following is obtained: Figure 8h The structure shown.

[0062] Step S730, adjusting the evaporation angle of the evaporation source to evaporate the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units.

[0063] In the embodiment of the present application, the evaporation angle of the evaporation source is adjusted so that the evaporation source is directed toward the second side, and the evaporation source is moved along the first direction to evaporate the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units. In the embodiment of the present application, when evaporating the material of the light-emitting functional unit, the evaporation source is directed toward the second side, which can ensure that the material of the light-emitting functional unit will not be evaporated onto the isolation structure on the first side; and because of the T-shaped or I-shaped shape of the isolation structure on the second side, a shielding effect is formed on the material of the light-emitting functional unit, and it will not be evaporated onto the isolation structure on the second side. It should be noted that for Figure 8e For the isolation structure shown, when evaporating light-emitting functional units of different colors, it is necessary to adjust the evaporation angle of the evaporation source to ensure that the evaporation source faces the second side. Figure 8h For the isolation structure shown, when evaporating light-emitting functional units of different colors, the evaporation angle of the evaporation source does not need to be adjusted, or can be fine-tuned according to actual conditions.

[0064] Step S740, adjusting the evaporation angle of the evaporation source to evaporate the material of the first electrode to obtain a plurality of first electrodes.

[0065] In the embodiment of the present application, the evaporation angle of the evaporation source is adjusted so that the evaporation source faces the first side; the evaporation source is moved along the first direction to evaporate the material of the first electrode to obtain a plurality of first electrodes. In the embodiment of the present application, when evaporating the material of the first electrode, the evaporation source faces the first side, and due to the trapezoidal structure of the isolation structure on the first side, the material of the first electrode is easily evaporated onto the isolation structure.

[0066] It should be noted that for Figure 8e For the isolation structure shown, when evaporating first electrodes corresponding to different colors, it is necessary to adjust the evaporation angle of the evaporation source to ensure that the evaporation source faces the first side. Figure 8h For the isolation structure shown, when evaporating first electrodes corresponding to different colors, the evaporation angle of the evaporation source does not need to be adjusted, or can be fine-tuned according to actual conditions.

[0067] Optionally, after preparing the first electrode, the method further includes: preparing a first encapsulation layer on the side of the first electrode facing away from the substrate, the first encapsulation layer comprising a plurality of spaced-apart encapsulation units, the encapsulation units corresponding to the light-emitting units, and the orthographic projections of the encapsulation units on the substrate covering the orthographic projections of the light-emitting units on the substrate.

[0068] Optionally, after preparing the first encapsulation layer, the method further comprises: sequentially preparing a second encapsulation layer and a third encapsulation layer on a side of the first encapsulation layer away from the substrate. Optionally, the first encapsulation layer and the third encapsulation layer are prepared by chemical vapor deposition, and the second encapsulation layer is prepared by inkjet printing.

[0069] In a fourth aspect, an embodiment of the present application provides a display device, which includes the display panel described in the above embodiment.

[0070] Fig. 9 is a schematic diagram of the structure of a display device provided by an embodiment of the present application. Fig. 9 As shown, the display device 900 is a product with an image display function. For example, the display device 900 can be used to display static images, such as pictures or photos. The display device 900 can also be used to display dynamic images, such as videos. The display device 900 can be a laptop, a mobile phone, a handheld or portable computer, a camera, a video camera, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0071] The display device 900 includes a display panel provided by any of the above embodiments, which may be an organic light emitting diode display panel or a quantum dot electroluminescent display panel.

[0072] In addition, the display device 900 may also have functions such as taking photos, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 900 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, and the like.

[0073] The basic principle of the present application is described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are necessary for each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of example and for the purpose of facilitating understanding, but not for limitation. The above details do not limit the present application to be implemented by adopting the above specific details. The block diagrams of the devices, devices, equipment, and systems involved in the present application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be recognized by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0074] It should also be noted that in the apparatus, equipment and method of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present application. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the present application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown here, but to the widest range consistent with the principles and novel features disclosed herein. The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some of its variations, modifications, changes, additions and sub-combinations.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings. The isolation opening has a first side and a second side that are arranged opposite to each other; the isolation structure includes a first end face close to the substrate and a second end face away from the substrate, and along a cross section perpendicular to the substrate, an angle between a line connecting an edge of the second end face on the first side and an edge of the first end face on the first side and the first end face is a first blocking angle, an angle between a line connecting an edge of the second end face on the second side and an edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; A plurality of light-emitting units are located in the isolation opening, and the light-emitting units include light-emitting functional units and a first electrode which are sequentially stacked in a direction away from the substrate. In the isolation opening, at least a portion of the light-emitting functional units are spaced apart from the isolation structure, and the first electrode is electrically connected to the isolation structure.

2. The display panel according to claim 1, characterized in that: The plurality of isolation openings include a first isolation opening and a second isolation opening which are alternately arranged in sequence along the first direction, the first isolation opening has a first sub-side and a second sub-side which are arranged opposite to each other along the first direction, the second isolation opening has a third sub-side and a fourth sub-side which are arranged opposite to each other along the first direction, and along a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face at the first sub-side and a line connecting an edge of the first end face at the first sub-side and the first end face is the first blocking angle, and an angle between an edge of the second end face at the second sub-side and a line connecting an edge of the first end face at the second sub-side and the first end face is the second blocking angle; along a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face at the third sub-side and a line connecting an edge of the first end face at the third sub-side and the first end face is the second blocking angle, and an angle between an edge of the second end face at the fourth sub-side and a line connecting an edge of the first end face at the fourth sub-side and the first end face is the first blocking angle; Preferably, in the first isolation opening, the first electrode and the isolation structure overlap on the first sub-side and do not overlap on the second sub-side, and in the second isolation opening, the first electrode and the isolation structure overlap on the fourth sub-side and do not overlap on the third sub-side; Preferably, the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, the first light-emitting unit and the third light-emitting unit are located in the first isolation opening, and the second light-emitting unit is located in the second isolation opening, or the first light-emitting unit and the third light-emitting unit are located in the second isolation opening, and the second light-emitting unit is located in the first isolation opening; Preferably, the first light emitting unit includes a red light emitting unit, the second light emitting unit includes a green light emitting unit, and the third light emitting unit includes a blue light emitting unit.

3. The display panel according to claim 1, characterized in that: The isolation structure comprises a first portion and a second portion which are sequentially stacked in a direction away from the substrate, the isolation structure comprises a first partition portion and a second partition portion which are sequentially alternately arranged in a first direction, the first partition portion and the second partition portion are symmetrically arranged about the isolation opening, the orthographic projection of the second portion of the first partition portion on the substrate is located within the orthographic projection of the first portion of the first partition portion on the substrate, and the orthographic projection of the second portion of the second partition portion on the substrate covers the orthographic projection of the first portion of the second partition portion on the substrate; Preferably, in a cross section perpendicular to the substrate, the first partition portion has a regular trapezoidal shape, and the second partition portion has a T-shaped or I-shaped shape; Preferably, a projection width of the first portion of the first partition portion on the substrate is greater than a projection width of the first portion of the second partition portion on the substrate; a projection width of the second portion of the first partition portion on the substrate is the same as a projection width of the second portion of the second partition portion on the substrate; Preferably, the isolation structure further comprises a third portion, the third portion is located on a side of the first portion close to the substrate, and the orthographic projection of the third portion on the substrate covers the orthographic projection of the first portion on the substrate; Preferably, the material of the first part includes aluminum, the material of the second part includes titanium, and the material of the third part includes molybdenum; Preferably, the first electrode overlaps the first partition portion, and the first electrode is spaced apart from the second partition portion.

4. The display panel according to claim 1, characterized in that: The plurality of isolation openings are arranged sequentially along a first direction; The isolation structure comprises a first portion and a second portion which are sequentially stacked in a direction away from the substrate, the isolation structure comprises a plurality of third partition portions arranged along the first direction, two adjacent third partition portions are symmetrically arranged about the isolation opening, the orthographic projection of the edge of at least some of the second portions of the third partition portions close to the first side on the substrate is located within the orthographic projection of the first portion of the third partition portion on the substrate, and the orthographic projection of the edge of at least some of the second portions of the third partition portions close to the second side on the substrate is located outside the orthographic projection of the first portion of the third partition portion on the substrate; Preferably, the isolation structure further comprises a third portion, the third portion is located on a side of the first portion close to the substrate, and the orthographic projection of the third portion on the substrate covers the orthographic projection of the first portion on the substrate; Preferably, the material of the first portion includes aluminum, the material of the second portion includes titanium, and the material of the third portion includes molybdenum.

5. The display panel according to any one of claims 1 to 4, characterized in that: The first electrode overlaps the isolation structure at the first side and does not overlap at the second side; Preferably, the first side and the second side are arranged opposite to each other along a first direction; the isolation opening further has a third side and a fourth side arranged opposite to each other along a second direction, the first direction and the second direction being perpendicular to each other; along a cross section perpendicular to the substrate direction, an angle between a line connecting at least a portion of an edge of the second end face located on the third side and at least a portion of an edge of the first end face located on the third side and the first end face is the second blocking angle; an angle between a line connecting at least a portion of an edge of the second end face located on the fourth side and at least a portion of an edge of the first end face located on the fourth side and the first end face is the second blocking angle; Preferably, along a cross section perpendicular to the substrate direction, an angle between a line connecting a portion of the second end surface located on the third side and a portion of the first end surface located on the third side and the first end surface is the first blocking angle, and an angle between a line connecting a portion of the second end surface located on the third side and a portion of the first end surface located on the third side and the first end surface is the second blocking angle; an angle between a line connecting a portion of the second end surface located on the fourth side and a portion of the first end surface located on the fourth side and the first end surface is the first blocking angle, and an angle between a line connecting a portion of the second end surface located on the fourth side and a portion of the first end surface located on the fourth side and the first end surface is the second blocking angle; Preferably, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle.

6. The display panel according to any one of claims 1 to 4, characterized in that: The light-emitting functional unit comprises a first transmission layer, a light-emitting layer, and a second transmission layer which are sequentially stacked in a direction away from the substrate; Preferably, the first transport layer comprises a hole transport layer, and the second transport layer comprises an electron transport layer; Preferably, the first transmission layer and the isolation structure are spaced apart; Preferably, the display panel further comprises a pixel definition layer located between the substrate and the isolation structure, the pixel definition layer enclosing a plurality of pixel openings, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the isolation openings on the substrate; Preferably, the light emitting unit further comprises a second electrode, the second electrode is located between the substrate and the pixel definition layer, and the pixel opening exposes a portion of the second electrode; Preferably, the display panel further comprises a first encapsulation layer, the first encapsulation layer is at least located on a side of the light-emitting unit away from the substrate, the first encapsulation layer comprises a plurality of encapsulation units arranged at intervals, the encapsulation units correspond to the light-emitting units, and the orthographic projections of the encapsulation units on the substrate cover the orthographic projections of the light-emitting units on the substrate; Preferably, the display panel further comprises a second encapsulation layer and a third encapsulation layer which are sequentially stacked in a direction away from the substrate, and the second encapsulation layer and the third encapsulation layer are located on a side of the first encapsulation layer away from the substrate; Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

7. A display panel, characterized in that: include: substrate; An isolation structure, located on one side of the substrate, the isolation structure encloses a plurality of isolation openings; The isolation structure comprises a first portion and a second portion which are sequentially stacked in a direction away from the substrate, the isolation structure comprises a first partition portion and a second partition portion which are symmetrically arranged about the isolation opening, a first spacing between the second portion of the first partition portion and the first portion of the first partition portion and the orthographic projection edge on the substrate, a second spacing between the second portion of the second partition portion and the first portion of the second partition portion and the orthographic projection edge on the substrate, and the second spacing is greater than the first spacing; A plurality of light-emitting units are located in the isolation opening, and the light-emitting units include light-emitting functional units and a first electrode which are sequentially stacked in a direction away from the substrate. In the isolation opening, at least a portion of the light-emitting functional units are spaced apart from the second partition portion, and the first electrode is in contact with and connected to the first partition portion.

8. The display panel according to claim 7, characterized in that: In a cross section perpendicular to the substrate, the first partition portion is in a regular trapezoidal shape, and the second partition portion is in a T-shaped or I-shaped shape; Preferably, a projection width of the first portion of the first partition portion on the substrate is different from a projection width of the first portion of the second partition portion on the substrate; a projection width of the second portion of the first partition portion on the substrate is the same as a projection width of the second portion of the second partition portion on the substrate; Preferably, the isolation structure further comprises a third portion, the third portion is located on a side of the first portion close to the substrate, and the orthographic projection of the third portion on the substrate covers the orthographic projection of the first portion on the substrate; Preferably, the light-emitting functional unit comprises a first transmission layer, a light-emitting layer and a second transmission layer which are sequentially stacked in a direction away from the substrate; Preferably, the first transport layer comprises a hole transport layer, and the second transport layer comprises an electron transport layer; Preferably, the first transmission layer and the isolation structure are spaced apart from each other.

9. The display panel according to claim 7 or 8, characterized in that: The isolation structure has a first side and a second side that are arranged opposite to each other along a first direction, the isolation structure includes a first end face close to the substrate and a second end face away from the substrate, and along a cross section perpendicular to the direction of the substrate, an angle between a line connecting an edge of the second end face on the first side and an edge of the first end face on the first side and the first end face is a first blocking angle, an angle between a line connecting an edge of the second end face on the second side and an edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; Preferably, the first electrode overlaps the isolation structure on the first side and does not overlap on the second side; Preferably, the isolation opening further has a third side and a fourth side arranged opposite to each other along a second direction, the first direction and the second direction being perpendicular; along a cross section perpendicular to the substrate direction, an angle between a line connecting at least a portion of an edge of the second end face located on the third side and at least a portion of an edge of the first end face located on the third side and the first end face is the second blocking angle; an angle between a line connecting at least a portion of an edge of the second end face located on the fourth side and at least a portion of an edge of the first end face located on the fourth side and the first end face is the second blocking angle; Preferably, along a cross section perpendicular to the substrate direction, an angle between a line connecting a portion of the second end surface located on the third side and a portion of the first end surface located on the third side and the first end surface is the first blocking angle, and an angle between a line connecting a portion of the second end surface located on the third side and a portion of the first end surface located on the third side and the first end surface is the second blocking angle; an angle between a line connecting a portion of the second end surface located on the fourth side and a portion of the first end surface located on the fourth side and the first end surface is the first blocking angle, and an angle between a line connecting a portion of the second end surface located on the fourth side and a portion of the first end surface located on the fourth side and the first end surface is the second blocking angle; Preferably, the first blocking angle is an acute angle, and the second blocking angle is an obtuse angle.

10. A method for preparing a display panel, characterized in that: include: preparing a plurality of second electrodes on the substrate; An isolation structure is prepared on a side of the second electrode away from the substrate, the isolation structure encloses a plurality of isolation openings, and the isolation openings have a first side and a second side that are arranged opposite to each other; the isolation structure includes a first end face close to the substrate and a second end face away from the substrate, and along a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face on the first side and an edge of the first end face on the first side and the first end face is a first blocking angle, an angle between an edge of the second end face on the second side and an edge of the first end face on the second side and the first end face is a second blocking angle, and the second blocking angle is greater than the first blocking angle; Adjusting the evaporation angle of the evaporation source to evaporate the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units, wherein at least part of the light-emitting functional units are spaced apart from the isolation structure; The evaporation angle of the evaporation source is adjusted to evaporate the material of the first electrode to obtain a plurality of first electrodes, the first electrode is electrically connected to the isolation structure, and the second electrode, the light-emitting functional unit and the first electrode constitute a light-emitting unit.

11. The method according to claim 10, characterized in that The step of preparing an isolation structure on a side of the second electrode facing away from the substrate comprises: Sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate; Performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure, wherein the intermediate structure includes first intermediate sub-structures and second intermediate sub-structures alternately arranged in sequence along a first direction; Covering the surface of the first intermediate substructure away from the substrate with photoresist; Performing a second patterning process on the second intermediate sub-structure to obtain a second partition portion, wherein the second partition portion is in a T-shape or an I-shape in a cross section perpendicular to the substrate; The photoresist is removed to obtain a first partition portion, wherein the shape of the first partition portion is a regular trapezoid in a cross section perpendicular to the substrate direction, wherein the first partition portion and the second partition portion enclose the isolation opening, the isolation opening comprises a first isolation opening and a second isolation opening, the first isolation opening and the second isolation opening are arranged alternately in sequence along the first direction, the first isolation opening has a first sub-side and a second sub-side arranged oppositely along the first direction, the second isolation opening has a third sub-side and a fourth sub-side arranged oppositely along the first direction, and in a cross section perpendicular to the substrate direction, the second end surface is at the first sub-side. An angle between a line connecting an edge of the second end face and an edge of the first end face on the first sub-side and the first end face is the first blocking angle, and an angle between a line connecting an edge of the second end face on the second sub-side and an edge of the first end face on the second sub-side and the first end face is the second blocking angle; along a cross section perpendicular to the direction of the substrate, an angle between an edge of the second end face on the third sub-side and an edge of the first end face on the third sub-side and the first end face is the second blocking angle, and an angle between an edge of the second end face on the fourth sub-side and an edge of the first end face on the fourth sub-side and the first end face is the first blocking angle; Preferably, the first patterning process comprises dry etching, and the second patterning process comprises wet etching; Preferably, performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure comprises: Covering the surface of the second conductive layer away from the substrate with a photoresist, and performing exposure and development to obtain a patterned photoresist; performing the first patterning process on the first conductive layer and the second conductive layer not covered with the photoresist to obtain the intermediate structure; Preferably, before the step of sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate, the method further includes: preparing a third conductive layer on a side of the second electrode facing away from the substrate; after the step of sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate, the method includes: performing a first patterning process on the first conductive layer, the second conductive layer and the third conductive layer to obtain an intermediate structure.

12. The method according to claim 10, characterized in that The step of preparing an isolation structure on a side of the second electrode facing away from the substrate comprises: Sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate; Performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure, wherein the intermediate structure includes a plurality of third sub-intermediate structures arranged along the first direction; Covering a portion of the surface of the third intermediate sub-structure away from the substrate with photoresist; performing a second patterning process on a portion of the third intermediate sub-structure not covered by the photoresist; Removing the photoresist to obtain a third partition portion, wherein two adjacent third partition portions enclose the isolation opening; Preferably, the first patterning process comprises dry etching, and the second patterning process comprises wet etching; Preferably, performing a first patterning process on the first conductive layer and the second conductive layer to obtain an intermediate structure comprises: Covering the surface of the second conductive layer away from the substrate with a photoresist, and performing exposure and development to obtain a patterned photoresist; performing the first patterning process on the first conductive layer and the second conductive layer not covered with the photoresist to obtain the intermediate structure; Preferably, before the step of sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate, the method further includes: preparing a third conductive layer on a side of the second electrode facing away from the substrate; after the step of sequentially preparing a first conductive layer and a second conductive layer on a side of the second electrode facing away from the substrate, the method includes: performing a first patterning process on the first conductive layer, the second conductive layer and the third conductive layer to obtain an intermediate structure.

13. The method according to claim 10, characterized in that The step of adjusting the evaporation angle of the evaporation source to evaporate the material of the light-emitting functional unit to obtain a plurality of light-emitting functional units includes: adjusting the evaporation angle of the evaporation source so that the evaporation source faces the second side; Moving the evaporation source along a first direction to evaporate the material of the light-emitting functional unit to obtain a plurality of the light-emitting functional units; Preferably, adjusting the evaporation angle of the evaporation source to evaporate the material of the first electrode to obtain a plurality of first electrodes comprises: adjusting the evaporation angle of the evaporation source so that the evaporation source faces the first side; The evaporation source is moved along the first direction to evaporate the material of the first electrode to obtain a plurality of the first electrodes.

14. The method according to claim 10, characterized in that Before the step of preparing an isolation structure on a side of the second electrode facing away from the substrate, the method further comprises: A pixel definition layer is prepared on a side of the second electrode facing away from the substrate, wherein the pixel definition layer encloses a plurality of pixel openings, wherein the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the isolation openings on the substrate, and the pixel openings expose a portion of the second electrode; Preferably, after adjusting the evaporation angle of the evaporation source and evaporating the material of the first electrode to obtain a plurality of first electrodes, the method further comprises: preparing a first encapsulation layer on a side of the first electrode away from the substrate, the first encapsulation layer comprising a plurality of encapsulation units arranged at intervals, the encapsulation units corresponding to the light-emitting units, and the orthographic projections of the encapsulation units on the substrate covering the orthographic projections of the light-emitting units on the substrate; Preferably, after preparing a first encapsulation layer on a side of the first electrode facing away from the substrate, the method further comprises: sequentially preparing a second encapsulation layer and a third encapsulation layer on a side of the first encapsulation layer facing away from the substrate.

15. A display device, characterized in that: A display panel comprising any one of claims 1 to 9, or a display panel prepared by the method for preparing a display panel according to any one of claims 10 to 14.

Images