Display panel and manufacturing method therefor, and display device

Abstract

The present application provides a display panel and a manufacturing method therefor, and a display device. The display panel comprises a substrate, a display function layer, isolation structures, a first packaging layer, and a first assisting layer. The display function layer is located in a display area and comprises a plurality of light-emitting elements arranged in an array, and each light-emitting element comprises a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked on the substrate; the isolation structures and the plurality of light-emitting elements are alternately arranged in an array on the substrate, and first grooves are formed in the surfaces of the isolation structures extending in a direction perpendicular to the substrate; the first packaging layer covers the display function layer, and second grooves are formed in an edge area of the first packaging layer close to the isolation structures; in a direction from the isolation structures to the substrate, the first packaging layer is at least partially covered by the isolation structures; the first assisting layer is located on the side of the first packaging layer away from the display function layer, and the second grooves are filled with at least part of the first assisting layer. Therefore, the display panel can have a high resolution, high light emitting efficiency, and high reliability.

Description

Display panel and manufacturing method thereof, and display device Technical Field

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

[0002] As OLED technology matures, mobile devices such as cell phones are increasingly adopting OLED display components. However, due to manufacturing process limitations, wide gaps form between adjacent light-emitting units, resulting in a smaller light-emitting area, a smaller aperture ratio, and lower light extraction efficiency.

[0003] Summary of the Invention

[0004] In response to the shortcomings of the related art, the present application proposes a display panel and its preparation method, and a display device to solve the problems in the related art that the light-emitting unit of the display panel has a small light-emitting area, a small aperture ratio or low light extraction efficiency.

[0005] An embodiment of the present application provides a display panel having a display area and a frame area surrounding the display area, wherein the display panel includes a substrate, a display function layer, an isolation structure, a first encapsulation layer, and a first auxiliary layer. The display function layer is located in the display area and includes a plurality of light-emitting elements arranged in an array, each light-emitting element including a first electrode, a light-emitting layer, and a second electrode sequentially stacked on the substrate; the isolation structure and the plurality of light-emitting elements are alternately arranged in an array on the substrate, and the isolation structure has a first groove on a surface extending in a direction perpendicular to the substrate; the first encapsulation layer covers the display function layer, and a second groove is formed in an edge region of the first encapsulation layer near the isolation structure; the first encapsulation layer is at least partially covered by the isolation structure in a direction from the isolation structure to the substrate; the first auxiliary layer is located on a side of the first encapsulation layer away from the display function layer and at least partially fills the second groove.

[0006] This embodiment adds an isolation structure to the display function layer of the display panel. The isolation structure has a first groove on its surface extending perpendicular to the substrate, which can isolate the light-emitting layers of adjacent light-emitting elements in the display function layer. The first groove prevents the light-emitting layer from being deposited on the side of the isolation structure near the edge of the isolation structure, thereby causing cross-color or poor display. During the vapor deposition process, light-emitting elements can be first vapor-deposited on the entire surface of the display panel, then the light-emitting elements in a designated area are retained, and the light-emitting elements in the remaining area are removed. Therefore, there is no need to use an FMM mask to separately prepare individual light-emitting elements. At the same time, this embodiment does not need to consider the alignment accuracy of the FMM mask during vapor deposition, so the gap between the light-emitting elements can be designed to be smaller, thereby increasing the light-emitting area of ​​the light-emitting unit and improving the aperture ratio of the display panel.

[0007] However, when the isolation structure has a first groove, during the evaporation process, due to the film-forming principle of the first encapsulation layer formed on the surface of the display functional layer, combined with the structural characteristics of the isolation structure having the first groove, closed pores are easily formed on the side of the isolation structure (as shown in FIG3 ), resulting in stress accumulation at the top of the side of the isolation structure (as shown in FIG2 ), causing the display panel to easily generate extended cracks and fail in subsequent reliability tests. In addition, the accumulation of stress will cause the isolation structure of the display panel to have poor extrusion resistance. During the evaporation process, since only the light-emitting elements in the designated area are retained, the closed pores in the first encapsulation layer will be etched to form a second groove. This embodiment considers forming a first auxiliary layer on the first encapsulation layer to fill the second groove formed after the first encapsulation layer is etched, thereby avoiding stress concentration and improving the extrusion resistance and reliability of the display panel.

[0008] In addition, since the isolation structure can block the light-emitting layer and at the same time form a first encapsulation layer on the display functional layer during the evaporation process, a dual protection mechanism of the isolation structure and the first encapsulation layer can be achieved to prevent the light-emitting layer from being corroded by water vapor, thereby extending the life of the display panel.

[0009] In one embodiment, two adjacent isolation structures form a first opening, the light-emitting layer and the second electrode are located in the first opening, the isolation structure is provided with a conductive portion, two adjacent second electrodes are separated by the isolation structure, and the second electrode overlaps the conductive portion of the isolation structure.

[0010] In one embodiment, the display panel further includes a pixel definition layer; the pixel definition layer is arranged on the side of the isolation structure facing the substrate, and the pixel definition layer includes a plurality of pixel definition units arranged in an array; along a direction perpendicular to the substrate, the orthographic projection of the isolation structure on the substrate is located within the orthographic projection of the pixel definition unit on the substrate.

[0011] In one embodiment, a second opening is formed between two adjacent pixel definition units, the second opening is located within the first opening, and the opening direction of the second opening is the same as the opening direction of the first opening; the first electrode is arranged on the side of the second opening facing the substrate, and a plurality of the first electrodes are respectively connected to the light-emitting layer, and two adjacent first electrodes are separated by the pixel definition layer.

[0012] In one embodiment, along a direction perpendicular to the substrate, an orthographic projection of the isolation structure on the substrate does not overlap with an orthographic projection of the light-emitting layer on the substrate.

[0013] In one embodiment, the first auxiliary layer is made of a light-transmitting material, and the first auxiliary layer is at least partially arranged on the side of the display function layer away from the substrate; along the direction perpendicular to the substrate, the orthographic projection of the first auxiliary layer on the substrate at least partially covers the orthographic projection of the edge area of ​​the display function layer close to the isolation structure on the substrate.

[0014] In one embodiment, the display panel further includes a second auxiliary layer, which is made of a light-transmitting material; the second auxiliary layer is arranged on a side of the first auxiliary layer away from the substrate, and the refractive index of the second auxiliary layer is not equal to the refractive index of the first auxiliary layer.

[0015] In one embodiment, the display panel further includes a first shading layer and a first planarization layer sequentially arranged on a side of the second auxiliary layer away from the first auxiliary layer, the first shading layer includes a plurality of first shading units arranged at intervals, the first planarization layer is at least partially arranged in a first spacing area between two adjacent first shading units, and along a direction perpendicular to the substrate, the orthographic projection of the first spacing area on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate.

[0016] In one embodiment, the display panel further includes a second shading layer and a second planarizing layer stacked in sequence on the first planarizing layer, the second shading layer includes a plurality of second shading units arranged at intervals, the second planarizing layer is at least partially arranged in a second spacing area between two adjacent second shading units, and along a direction perpendicular to the substrate, the orthographic projection of the second spacing area on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate, wherein the orthographic projection of the second shading unit on the substrate covers and is larger than the orthographic projection of the first shading unit on the substrate.

[0017] In one embodiment, the display panel further includes a first light adjustment layer and a second light adjustment layer sequentially stacked on the first planarization layer, and along a direction perpendicular to the substrate, an overlapping area of ​​an orthographic projection of the first light adjustment layer on the substrate and an orthographic projection of the second light adjustment layer on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate.

[0018] In one embodiment, the display panel further includes a filter layer stacked on the second auxiliary layer, the filter layer including alternatingly arranged shading units and filter units, and along a direction perpendicular to the substrate, the orthographic projection of the filter unit on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate.

[0019] In one embodiment, along the direction from the substrate to the display function layer, the projection area of ​​the orthographic projection of the isolation structure on the substrate gradually increases;

[0020] In one embodiment, the isolation structure includes a first isolation portion and a second isolation portion sequentially stacked on the substrate, wherein, along a direction perpendicular to the substrate, an orthographic projection of an end surface of the first isolation portion facing the second isolation portion on the substrate is within an orthographic projection of the second isolation portion on the substrate;

[0021] In one embodiment, the isolation structure includes a third isolation portion, a first isolation portion, and a second isolation portion stacked sequentially on the substrate. Along the direction perpendicular to the substrate, the orthographic projection of the second isolation portion on the substrate is located within the orthographic projection of the third isolation portion on the substrate, and the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate.

[0022] In one embodiment, the first encapsulation layer is also located in the frame area, and along the direction from the display function layer to the substrate, the projection area of ​​the orthographic projection of the first encapsulation layer on the substrate gradually increases.

[0023] The present application also provides a method for preparing a display panel, comprising the following steps:

[0024] forming a driving circuit layer and a planarization layer on a substrate;

[0025] forming a first electrode on the planarization layer;

[0026] forming a pixel definition layer on the first electrode, wherein the pixel definition layer includes a plurality of pixel definition units arranged at intervals;

[0027] forming an isolation structure on the pixel definition unit, wherein a surface of the isolation structure extending in a direction perpendicular to the substrate has a first groove, and a first opening is formed between two adjacent isolation structures;

[0028] A light-emitting layer, a second electrode, and a first encapsulation layer are stacked in the first opening, wherein a second groove is formed in an edge region of the first encapsulation layer near the isolation structure; and the first encapsulation layer is at least partially covered by the isolation structure in a direction from the isolation structure to the substrate.

[0029] A first auxiliary layer is formed on a side of the first encapsulation layer away from the display function layer, and the first auxiliary layer at least partially fills the second groove.

[0030] In one embodiment, along a direction parallel to the substrate, the first opening includes a first sub-opening, a second sub-opening, and a third sub-opening arranged in an array, the light-emitting layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer arranged in an array, the first sub-opening, the second sub-opening, and the third sub-opening correspond to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, respectively, and the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer emit light of different colors; wherein the light-emitting layer, the second electrode, and the first encapsulation layer are stacked in the first opening and include:

[0031] The first light-emitting layer in the first sub-opening, the second light-emitting layer in the second sub-opening, the third light-emitting layer in the third sub-opening, and the second electrode and the first packaging layer in the first opening are sequentially formed using a photolithography process.

[0032] In one embodiment, after forming the first auxiliary layer on a side of the first encapsulation layer away from the display function layer, the method further includes:

[0033] A second auxiliary layer is formed on the first auxiliary layer, wherein the refractive index of the second auxiliary layer is not equal to the refractive index of the first auxiliary layer.

[0034] The present application also provides a display device, comprising the display panel as described in the aforementioned embodiment.

[0035] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] FIG1 is a schematic diagram showing the structural characteristics of an isolation structure provided in an embodiment of the present application during a preparation process;

[0038] FIG2 is a schematic diagram showing a stress simulation of an isolation structure provided in an embodiment of the present application;

[0039] FIG3 is a schematic diagram showing a film structure of a display panel provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0041] FIG5 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0042] FIG6 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0043] FIG7 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0044] FIG8 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0045] FIG9 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0046] FIG10 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0047] FIG11 is a schematic diagram showing a film structure of another display panel provided in an embodiment of the present application;

[0048] FIG12 is a schematic diagram showing a film structure of another display panel provided in an embodiment of the present application;

[0049] FIG13 is a schematic diagram showing a film layer structure in a border area of ​​a display panel provided in an embodiment of the present application;

[0050] 14a to 14g are schematic structural diagrams showing the steps of a method for manufacturing a display panel according to an embodiment of the present application;

[0051] 15a to 15f are schematic structural diagrams of the steps of a method for preparing a monochromatic light-emitting layer in a display panel provided in an embodiment of the present application.

[0052] In the figure: 1-substrate; 2-driving circuit layer; 21-active layer; 22-source; 23-drain; 24-gate; 25-gate insulating layer; 26-interlayer dielectric layer; 3-planarization layer; 4-pixel definition layer; 41-pixel definition unit; 5-isolation structure; 51-first isolation part; 52-second isolation part; 53-third isolation part; 501-first groove; 6-display function layer; 61-first electrode; 62-light-emitting layer; 621-first light-emitting layer; 63-second electrode; 7-first encapsulation layer; 701-second groove; 1-first sub-encapsulation layer; 72-second sub-encapsulation layer; 73-third sub-encapsulation layer Encapsulation layer; 8-first auxiliary layer; 9-second auxiliary layer; 10-second encapsulation layer; 101-first inorganic layer; 102-first organic layer; 103-second inorganic layer; 11-first light-shielding layer; 111-first light-shielding unit; 12-first planarization layer; 13-second light-shielding layer; 131-second light-shielding unit; 14-second planarization layer; 15-first light-regulating layer; 16-second light-regulating layer; 17-third light-shielding layer; 18-third planarization layer; 19-filter layer; 20-photoresist; A1-first spacer; A2-second spacer; 100-first opening; 200-second opening. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0054] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0055] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" the other layer or region.

[0056] Research has found that due to the limitations of the preparation process and structure, for example, when evaporating the light-emitting layer, a fine metal mask (FMM) is usually used. During the evaporation process, multiple alignments are required, and tolerances are reserved between the corresponding areas of the pixels to avoid alignment accuracy errors as much as possible. Therefore, there are certain gaps in the evaporated areas between the light-emitting elements. The existence of the gap will compress the light-emitting area of ​​the pixel on the display panel, thereby affecting the aperture ratio and luminous efficiency of the display panel, resulting in lower resolution.

[0057] The display panel, its manufacturing method, and the display device provided in this application are intended to solve the above technical problems in the related art.

[0058] The display panel and its manufacturing method, and the display device in the embodiments of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or be combined with each other.

[0059] An embodiment of the present application provides a display panel having a display area and a border area surrounding the display area. As shown in FIG3 , the display panel includes a substrate 1, a display function layer 6, an isolation structure 5, a first encapsulation layer 7, and a first auxiliary layer 8. The display function layer 6 is located in the display area and includes a plurality of light-emitting elements arranged in an array. Each light-emitting element includes a first electrode 61, a light-emitting layer 62, and a second electrode 63 sequentially stacked on the substrate 1. The isolation structure 5 and the plurality of light-emitting elements are alternately arranged in an array on the substrate 1. The isolation structure 5 has a first groove 501 on its surface extending perpendicular to the substrate 1. The first encapsulation layer 7 covers the display function layer 6. A second groove 701 is formed in the edge region of the first encapsulation layer 7 near the isolation structure 5. The first encapsulation layer 7 is at least partially covered by the isolation structure 5 in the direction from the isolation structure 5 toward the substrate 1. The first auxiliary layer 8 is located on the side of the first encapsulation layer 7 away from the display function layer 6 and at least partially fills the second groove 701.

[0060] In this embodiment, an isolation structure 5 is added to the display function layer 6 of the display panel. The surface of the isolation structure 5 extending perpendicular to the substrate 1 has a first groove 501, which can separate the light-emitting layers 62 of adjacent light-emitting elements in the display function layer 6. The first groove 501 prevents the light-emitting layer 62 from being deposited on the side of the isolation structure 5 near the edge of the isolation structure 5, thereby causing cross-color or poor display. During the evaporation process, light-emitting elements can be first evaporated on the entire surface of the display panel, and then the light-emitting elements in the designated area are retained, and the light-emitting elements in the remaining area are removed. Therefore, there is no need to use an FMM mask to separately prepare individual light-emitting elements. At the same time, in this embodiment, there is no need to consider the alignment accuracy of the FMM mask during evaporation, so the gap between the light-emitting elements can be designed to be smaller, thereby increasing the light-emitting area of ​​the light-emitting unit and improving the aperture ratio of the display panel.

[0061] However, when the isolation structure 5 has a first groove 501, during the evaporation process, due to the film-forming principle of the first encapsulation layer 7 formed on the surface of the display functional layer 6, combined with the structural characteristics of the isolation structure 5 having the first groove 501, closed pores are easily formed on the side of the isolation structure 5 (as shown in FIG1 ), resulting in stress accumulation at the top of the side of the isolation structure 5 (as shown in FIG2 ), causing the display panel to easily generate extended cracks and fail in subsequent reliability tests. In addition, due to the accumulation of stress, the isolation structure 5 of the display panel will have poor extrusion resistance. During the evaporation process, since only the light-emitting elements in the designated area are retained, the closed pores in the first encapsulation layer 7 will be etched to form a second groove 701. This embodiment considers forming a first auxiliary layer 8 on the first encapsulation layer 7 to fill the second groove 701 formed after the first encapsulation layer 7 is etched, thereby avoiding stress concentration and improving the extrusion resistance and reliability of the display panel.

[0062] In addition, since the isolation structure 5 can block the light-emitting layer 62 and at the same time form a first encapsulation layer 7 on the display functional layer 6 during the evaporation process, a dual protection mechanism of the isolation structure 5 and the first encapsulation layer 7 can be achieved to prevent the light-emitting layer 62 from being corroded by water vapor, thereby extending the life of the display panel.

[0063] In some embodiments, the first encapsulation layer 7 is an inorganic material, and the first auxiliary layer 8 is an organic material.

[0064] In some embodiments, the first electrode 61 and the second electrode 63 have opposite electrical properties. Exemplarily, the first electrode 61 is an anode and the second electrode 63 is a cathode. Further exemplarily, the first electrode 61 is a cathode and the second electrode 63 is an anode.

[0065] In some embodiments, the side of the substrate 1 close to the display function layer 6 is also covered with a buffer layer (not shown in the figure). The buffer layer is an inorganic thin film, which can be SiN x , SiO x Or a composite layer.

[0066] In some embodiments, as shown in Figure 3, the display panel also includes a driving circuit layer 2, which includes an active layer 21, a gate insulating layer 25 and a gate 24 stacked on the active layer 21, and a source electrode 22 and a drain electrode 23 connected to both ends of the active layer 21. The source electrode and the drain electrode are separated from the gate electrode by an interlayer dielectric layer 26. The driving circuit layer 2 is electrically connected to the first electrode 61 for controlling the light-emitting element to emit light.

[0067] In some embodiments, as shown in FIG3 , the display panel further includes a planarization layer 3 between the driving circuit layer 2 and the first electrode 61 . The planarization layer 3 is provided with a via hole, and the first electrode 61 is connected to the source 22 or drain 23 of the driving circuit through the via hole.

[0068] In some embodiments, as shown in Figure 3, two adjacent isolation structures 5 form a first opening 100, the light-emitting layer 62 and the second electrode 63 are located in the first opening 100, the isolation structure 5 is provided with a conductive portion (not shown in the figure), the two adjacent second electrodes 63 are separated by the isolation structure 5, and the second electrode 63 overlaps with the conductive portion of the isolation structure 5.

[0069] The isolation structure 5 in this embodiment at least partially forms a conductive portion, and an electrical connection can be established between adjacent second electrodes 63 through the conductive portion, thereby forming a mesh-interconnected second electrode network. The second electrode network can be further connected to the circuit interface, so that the electrical connection between the second electrode networks can be achieved with only one circuit interface. The conductive portion of the isolation structure 5 overlaps with the second electrode 63 to avoid poor contact.

[0070] In some embodiments, the isolation structure 5 is made of a combination of multiple metals or metal nitrides. For example, the isolation structure 5 is made of Ti / Al / Ti or SiN / Ti / Al / Ti.

[0071] In some embodiments, as shown in FIG3 , the display panel further includes a pixel definition layer 4 . The pixel definition layer 4 is disposed on the side of the isolation structure 5 facing the substrate. The pixel definition layer 4 includes a plurality of pixel definition units 41 arranged in an array. In a direction perpendicular to the substrate 1 , the orthographic projection of the isolation structure 5 on the substrate 1 is located within the orthographic projection of the pixel definition unit 41 on the substrate 1 .

[0072] In this embodiment, the approximate position of the light-emitting unit is determined by the pixel definition layer 4, thereby determining the position of the isolation structure 5. Therefore, after the pixel definition layer 4 is formed on the display panel, the isolation structure 5 can be directly formed according to the position of the pixel definition layer 4. Since the orthographic projection of the isolation structure 5 on the substrate 1 is located within the orthographic projection of the pixel definition unit 41 on the substrate 1, when the light-emitting material is evaporated on the front, the light-emitting layer 62 includes a central area and edge areas on both sides. The central area is located within the pixel definition area formed by two adjacent pixel definition units 41, and the two edge areas can cover the edges of the pixel definition units 41, so that the actual light-emitting area of ​​the light-emitting layer 62 is larger than the area of ​​the pixel definition area. Therefore, the gap between the two adjacent light-emitting elements can be reduced, the light-emitting area of ​​the light-emitting elements in the display panel can be increased, the aperture ratio can be improved, and the light extraction efficiency can be improved, which can further improve the brightness of the display panel.

[0073] In some embodiments, the pixel definition layer 4 is made of an organic insulating material, which may be PI (polyimide), BCB (benzocyclobutene) or a photoresist material.

[0074] In some embodiments, as shown in FIG3 , a second opening 200 is formed between two adjacent pixel definition units 41 . The second opening 200 is located within the first opening 100 , and the opening direction of the second opening 200 is the same as the opening direction of the first opening 100 . A first electrode 61 is disposed on the side of the second opening 200 facing the substrate 1 . Multiple first electrodes 61 are respectively connected to the light-emitting layer 62 , and two adjacent first electrodes 61 are separated by the pixel definition layer 4 . In this embodiment, the second opening 200 of the pixel definition unit 41 can be used to define the position of the light-emitting layer 62 , and the first groove 501 of the second opening 200 can accommodate the light-emitting material to increase the thickness of the light-emitting material and improve the brightness. The pixel definition layer can separate the first electrodes 61 to prevent parallel short circuits between circuits.

[0075] It should be noted that in some embodiments, when the isolation structure 5 is made of a non-conductive material, the pixel definition layer 4 can be omitted. By isolating the first electrodes 61 through the isolation structure 5, the film structure of the display panel can be further thinned, thereby improving the user experience.

[0076] In some embodiments, as shown in FIG. 3 , along a direction perpendicular to the substrate 1 , the orthographic projection of the isolation structure 5 on the substrate 1 does not overlap with the orthographic projection of the light-emitting layer 62 on the substrate 1 .

[0077] In this embodiment, the orthographic projection areas of the isolation structure 5 and the light-emitting layer 62 on the display panel do not overlap. This prevents the isolation structure 5 from blocking the light-emitting layer 62, thereby maximizing the use of light emitted by the light-emitting material in the light-emitting layer 62. Furthermore, during the formation of the light-emitting layer 62, excess light-emitting layer 62 of other colors is prevented from being deposited in the edge regions without being etched, thereby preventing cross-color contamination between individual light-emitting elements.

[0078] In some embodiments, as shown in Figure 3, the first auxiliary layer 8 is made of a light-transmitting material and is at least partially disposed on the side of the display function layer 6 facing away from the substrate 1. In a direction perpendicular to the substrate 1, the orthographic projection of the first auxiliary layer 8 on the substrate 1 at least partially covers the orthographic projection of the edge region of the display function layer 6 near the isolation structure 5 on the substrate 1. In this embodiment, the first auxiliary layer 8 is made of a light-transmitting material and is disposed on the side of the light-emitting layer 62 facing away from the substrate 1. This allows the first auxiliary layer 8 to modulate the light emitted by the light-emitting layer 62, thereby improving light utilization.

[0079] In some embodiments, as shown in FIG3 , the display panel further includes a second auxiliary layer 9, which is made of a light-transmitting material. The second auxiliary layer 9 is disposed on the side of the first auxiliary layer 8 facing away from the substrate 1, and the refractive index of the second auxiliary layer 9 is not equal to the refractive index of the first auxiliary layer 8. In this embodiment, the second auxiliary layer 9 is disposed on the basis of the first auxiliary layer 8, so that the refractive index between the first auxiliary layer 8 and the second auxiliary layer 9 is not equal, thereby forming an interface for adjusting the light emission angle, thereby increasing the light emission angle, and improving the light extraction efficiency and light utilization rate. In addition, in the preparation process, if the first auxiliary layer 8 does not completely fill the second groove 701 of the first encapsulation layer 7, the second auxiliary layer 9 can also assist in filling the second groove 701, thereby avoiding stress concentration.

[0080] In some embodiments, the refractive index of the second auxiliary layer 9 is greater than the refractive index of the first auxiliary layer 8 .

[0081] Furthermore, the difference between the refractive index of the second auxiliary layer 9 and the refractive index of the first auxiliary layer 8 is greater than 0.16.

[0082] In some embodiments, the refractive index of the first auxiliary layer 8 is 1.4-1.6, and the refractive index of the second auxiliary layer 9 is 1.7-1.9.

[0083] In some embodiments, as shown in Figures 4 to 8 , the display panel further includes a second encapsulation layer 10 disposed on the second auxiliary layer 9. The second encapsulation layer 10 includes a first inorganic layer 101, a first organic layer 102, and a second inorganic layer 103 stacked in sequence. The second encapsulation layer 10 can encapsulate the entire display panel to protect the functional film layers in the display panel from moisture corrosion, thereby improving device stability.

[0084] In some embodiments, as shown in Figure 4, the display panel also includes a first shading layer 11 and a first planarization layer 12 arranged in sequence on the side of the second auxiliary layer 9 away from the first auxiliary layer 8, the first shading layer 11 includes a plurality of first shading units 111 arranged at intervals, and the first planarization layer 12 is at least partially arranged in a first spacing area A1 between two adjacent first shading units 111, and along a direction perpendicular to the substrate 1, the orthographic projection of the first spacing area A1 on the substrate 1 at least partially covers the orthographic projection of the light-emitting layer 62 on the substrate 1.

[0085] In this embodiment, the first light shielding layer 11 is combined with the isolation structure 5 to add a light blocking structure on the side of the light emitting layer 62, thereby realizing a side privacy protection design. In some embodiments, the first light shielding layer 11 can surround the light emitting element to further achieve four-sided privacy protection.

[0086] In some embodiments, as shown in Figure 5, the display panel also includes a second shading layer 13 and a second planarizing layer 14 stacked in sequence on the first planarizing layer 12, the second shading layer 13 includes a plurality of second shading units 131 arranged at intervals, and the second flat layer is at least partially arranged in a second spacing area A2 between two adjacent second shading units 131, and along the direction perpendicular to the substrate 1, the orthographic projection of the second spacing area A2 on the substrate 1 at least partially covers the orthographic projection of the light-emitting layer 62 on the substrate 1, wherein the orthographic projection of the second shading unit 131 on the substrate 1 covers and is larger than the orthographic projection of the first shading unit 111 on the substrate 1.

[0087] In this embodiment, a second light shielding layer 13 is further formed on the basis of the first light shielding layer 11, and the orthographic projection of the second light shielding layer 13 on the substrate 1 is larger than the orthographic projection of the first light shielding layer 11 on the substrate 1. Therefore, the anti-peeping effect can be further enhanced.

[0088] In some embodiments, the radial dimension of the orthographic projection of the second light-shielding layer 13 on the substrate 1 is 10-30 μm larger than the radial dimension of the orthographic projection of the first light-shielding layer 11 on the substrate 1 .

[0089] In some embodiments, as shown in Figure 6, the display panel also includes a first light adjustment layer 15 and a second light adjustment layer 16 stacked sequentially on the first planarization layer 12. Along the direction perpendicular to the substrate 1, the overlapping area of ​​the orthographic projection of the first light adjustment layer 15 on the substrate 1 and the orthographic projection of the second light adjustment layer 16 on the substrate 1 at least partially covers the orthographic projection of the light-emitting layer 62 on the substrate 1.

[0090] In this embodiment, by disposing the first light regulating layer 15 and the second light regulating layer 16 on the first light shielding layer 11 , the light emitted through the anti-peeping structure can be further concentrated and then emitted, thereby improving the brightness of the display panel.

[0091] It should be noted that a plurality of first and second light-regulating layers are stacked on both sides of each light-shielding layer and the corresponding planarization layer 3. Those skilled in the art can flexibly design the design and are not limited thereto. As shown in FIG7 , a second light-shielding layer 13 and a second planarization layer 14 can be stacked over the first and second light-regulating layers 15 and 16 stacked on the first planarization layer 12 to further enhance the privacy protection effect.

[0092] In some embodiments, as shown in FIG8 , the display panel further includes a third light shielding layer 17 and a third planarizing layer 18 stacked on the second planarizing layer 14 . Experimental results show that the anti-peeping effect is better when three light shielding layers are provided.

[0093] In addition, as shown in FIG. 9 , the first light shielding layer 11 and the first planarization layer 12 may serve as the first organic layer 102 in the second encapsulation layer 10 to further reduce the thickness of the display panel.

[0094] In some embodiments, as shown in FIG10 , the display panel further includes a filter layer 19 stacked on the second auxiliary layer 9. The filter layer 19 includes alternating light-shielding units and filter units. In a direction perpendicular to the substrate 1, the orthographic projections of the filter units on the substrate 1 at least partially cover the orthographic projections of the light-emitting layer 62 on the substrate 1. The filter layer 19 in this embodiment can also further improve the light extraction efficiency of the display panel, thereby optimizing the display effect.

[0095] In some embodiments, the display panel further includes a first light adjustment layer 15 and a second light adjustment layer 16 (not shown) stacked on the filter layer 19 to adjust the light output angle and light output efficiency of the displayed face.

[0096] In some embodiments, along the direction from the substrate 1 to the display function layer 6 , the projection area of ​​the orthographic projection of the isolation structure 5 on the substrate 1 gradually increases.

[0097] In some embodiments, the side surface of the isolation structure 5 is a straight surface, a curved surface, a stepped surface, or a sawtooth surface. In this embodiment, a first groove 501 is formed between the connection surface of the isolation structure 5 and the display function layer 6. For example, as shown in FIG11 , the isolation structure 5 is in the shape of an inverted trapezoid.

[0098] In some embodiments, the isolation structure 5 includes a first isolation portion 51 and a second isolation portion 52 sequentially stacked on the substrate 1. In a direction perpendicular to the substrate 1, the orthographic projection of the end surface of the first isolation portion 51 facing the second isolation portion 52 on the substrate 1 lies within the orthographic projection of the second isolation portion 52 on the substrate 1. In this embodiment, a first groove 501 is formed between the connecting surfaces of the first isolation portion 51 and the second isolation portion 52. For example, as shown in FIG12 , the first isolation portion 51 is an isolation column, and the second isolation portion 52 is an eaves structure.

[0099] In some embodiments, as shown in FIG3 , the isolation structure 5 includes a third isolation portion 53, a first isolation portion 51, and a second isolation portion 52 sequentially stacked on the substrate 1. In a direction perpendicular to the substrate 1, the orthographic projection of the second isolation portion 52 on the substrate 1 lies within the orthographic projection of the third isolation portion 53 on the substrate 1, and the orthographic projection of the first isolation portion 51 on the substrate 1 lies within the orthographic projection of the second isolation portion 52 on the substrate 1. Thus, in this embodiment, the connecting surfaces of the first isolation portion 51, the second isolation portion 52, and the third isolation portion 53 form a first groove 501. For example, as shown in FIG3 , the isolation structure 5 in this embodiment is I-shaped. The third isolation portion 53 is disposed at the bottom of the isolation structure 5 to further limit the diffusion area of ​​the light-emitting layer 62, preventing the orthographic projection of the light-emitting layer 62 on the substrate 1 from exceeding the orthographic projection of the second isolation portion 52 of the isolation structure 5 on the substrate 1. This facilitates controlling the coverage area of ​​the light-emitting layer 62 during the evaporation process and improves the utilization rate of the light-emitting layer 62.

[0100] In some embodiments, as shown in FIG3 , the radial dimension of the orthographic projection of the isolation structure 5 on the substrate 1 is 3-5 μm.

[0101] In some embodiments, as shown in FIG13 , the first encapsulation layer 7 is also located in the frame area, and the projection area of ​​the orthographic projection of the first encapsulation layer 7 on the substrate 1 gradually increases along the direction from the display function layer 6 to the substrate 1 .

[0102] In this embodiment, the first encapsulation layer 7 in the border area has a slope-like shape, which prevents the film layer boundaries in the display panel from being vertically flush, thereby reducing stress accumulation and improving structural stability. This also prevents the film layers deposited on the first encapsulation layer 7 from experiencing poor continuity or even breakage due to step differences.

[0103] In some embodiments, as shown in FIG13 , the first encapsulation layer 7 located in the border region includes a first sub-encapsulation layer 71, a second sub-encapsulation layer 72, and a third sub-encapsulation layer 73 sequentially stacked on the substrate 1. The radial dimension of the projected area of ​​the orthographic projection of the first sub-encapsulation layer 71 on the substrate 1 is 5 to 20 μm larger than the radial dimension of the projected area of ​​the orthographic projection of the second sub-encapsulation layer 72 on the substrate 1. The radial dimension of the projected area of ​​the orthographic projection of the second sub-encapsulation layer 72 on the substrate 1 is 5 to 20 μm larger than the radial dimension of the projected area of ​​the orthographic projection of the third sub-encapsulation layer 73 on the substrate 1. For example, the radial dimension of the projected area of ​​the orthographic projection of the first sub-encapsulation layer 71 on the substrate 1 is 10 μm larger than the radial dimension of the projected area of ​​the orthographic projection of the second sub-encapsulation layer 72 on the substrate 1. The radial dimension of the projected area of ​​the orthographic projection of the second sub-encapsulation layer 72 on the substrate 1 is 10 μm larger than the radial dimension of the projected area of ​​the orthographic projection of the third sub-encapsulation layer 73 on the substrate 1.

[0104] Based on the same inventive concept, the present application also provides a method for preparing a display panel, comprising the following steps:

[0105] Step 100: As shown in FIG14 a , a driving circuit layer 2 and a planarization layer 3 are stacked on a substrate 1 ;

[0106] Step 200: As shown in FIG14 b , a first electrode 61 is formed on the planarization layer 3 ;

[0107] Step 300: As shown in FIG14 c , a pixel definition layer 4 is formed on the first electrode 61 , wherein the pixel definition layer 4 includes a plurality of pixel definition units 41 arranged at intervals;

[0108] Step 400: As shown in FIG14 d , an isolation structure 5 is formed on the pixel definition unit 41 . The surface of the isolation structure 5 extending in a direction perpendicular to the substrate 1 has a first groove 501 , and a first opening 100 is formed between two adjacent isolation structures 5 .

[0109] Step 500: As shown in FIG14e , a light-emitting layer 62, a second electrode 63, and a first encapsulation layer 7 are stacked within the first opening 100. A second groove 701 is formed in the edge region of the first encapsulation layer 7 near the isolation structure 5. The first encapsulation layer 7 is at least partially covered by the isolation structure 5 in a direction from the isolation structure 5 toward the substrate 1.

[0110] Step 600 : as shown in FIG. 14 f , a first auxiliary layer 8 is formed on a side of the first encapsulation layer 7 away from the display function layer 6 , and the first auxiliary layer 8 at least partially fills the second groove 701 .

[0111] In this embodiment, an isolation structure 5, a first encapsulation layer 7, and a first auxiliary layer 8 are utilized. Since the isolation structure 5 can separate the light-emitting layers 62, an array of light-emitting elements can be prepared without using a fine metal mask. In addition, the first encapsulation layer 7 can resist the erosion of the light-emitting layer 62 by water vapor. The first auxiliary layer 8 is at least partially covered by the isolation structure 5, which can avoid stress concentration at the top of the isolation structure 5 and improve the structural stability and reliability of the display panel.

[0112] In some embodiments, along a direction parallel to substrate 1, first opening 100 includes a first sub-opening, a second sub-opening, and a third sub-opening arranged in an array. Light-emitting layer 62 includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer arranged in an array. The first sub-opening, the second sub-opening, and the third sub-opening correspond to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, respectively. The first light-emitting layer 621, the second light-emitting layer, and the third light-emitting layer emit light of different colors. Step 500 specifically includes: sequentially forming the first light-emitting layer within the first sub-opening, the second light-emitting layer within the second sub-opening, and the third light-emitting layer within the third sub-opening using a photolithography process, as well as the second electrode 63 and the first encapsulation layer 7 within the first opening 100.

[0113] For example, taking the preparation of the first light-emitting layer 621 as an example, step 500 includes the following steps:

[0114] Step 510: As shown in FIG15 a , a first light-emitting layer 621 and a second electrode 63 are sequentially stacked on the entire surface of the isolation structure 5 on the side away from the substrate 1 ;

[0115] Step 520: As shown in FIG15 b , a first encapsulation layer 7 is formed on the side of the second electrode 63 away from the substrate 1 ;

[0116] Step 530: As shown in FIG15 c , covering the first encapsulation layer 7 with a photoresist 20 ;

[0117] Step 540: As shown in FIG15 d , the photoresist 20 is exposed and developed using a yellow light process, leaving the photoresist 20 at the first sub-opening, with both sides of the photoresist 20 flush with both ends of the isolation structure 5 ;

[0118] Step 550: as shown in FIG15 e , the second electrode 63 and the first light-emitting layer 621 outside the area covered by the photoresist 20 are etched until the isolation structure 5 or the first electrode 61 is exposed;

[0119] Step 560: As shown in FIG. 15 f , the photoresist 20 is removed.

[0120] The preparation process of the second light-emitting layer and the third light-emitting layer is similar to that of the first light-emitting layer 621, and therefore will not be repeated here.

[0121] In this embodiment, a photolithography process is used, so a single-color light-emitting element can be formed without an FMM mask. The preparation process is not limited by the FMM mask, and the spacing between the light-emitting layers 62 can be further reduced, thereby improving the light-emitting effect and light extraction efficiency.

[0122] In some embodiments, the first sub-light emitting layer 62 emits green light, the second sub-light emitting layer 62 emits blue light, and the third sub-light emitting layer 62 emits red light. It should be noted that in some embodiments, the light emitting layer 62 further includes a fourth sub-light emitting layer 62 that emits white light, and its preparation principle is similar to that of the first and second sub-light emitting layers 62.

[0123] In some embodiments, the method for manufacturing a display panel further includes the following steps after step 600:

[0124] Step 700 : As shown in FIG. 14 g , a second auxiliary layer 9 is formed on the first auxiliary layer 8 . The refractive index of the second auxiliary layer 9 is not equal to the refractive index of the first auxiliary layer 8 .

[0125] In this embodiment, the second auxiliary layer 9 is added to cooperate with the first auxiliary layer 8 to adjust the light emission angle, thereby increasing the light extraction efficiency of the display panel.

[0126] Based on the same inventive concept, this application also provides another method for preparing a display panel, wherein the light-emitting layer 62 of the display panel includes a first light-emitting layer 621, a second light-emitting layer, and a third light-emitting layer arranged in an array, and the first light-emitting layer 621, the second light-emitting layer, and the third light-emitting layer emit light of different colors. Specifically, the method includes the following steps:

[0127] Step 100: forming a driving circuit layer 2 and a planarization layer 3 on a substrate 1;

[0128] Step 200: forming a first electrode 61 on the planarization layer 3;

[0129] Step 300 ′: forming a first pixel definition layer 4 corresponding to the first light-emitting layer 621 on the first electrode 61 , wherein the first pixel definition layer 4 includes a plurality of first pixel definition units 41 arranged at intervals;

[0130] Step 400 ′: forming an isolation structure 5 on the first element definition unit, wherein a surface of the isolation structure 5 extending in a direction perpendicular to the substrate 1 has a first groove 501 , and a first opening 100 is formed between two adjacent isolation structures 5 ;

[0131] Step 500': A first light-emitting layer 621, a second electrode 63, and a first encapsulation layer 7 are stacked within the first opening 100. A second groove 701 is formed in the edge region of the first encapsulation layer 7 near the isolation structure 5. The first encapsulation layer 7 is at least partially covered by the isolation structure 5 in a direction from the isolation structure 5 toward the substrate 1.

[0132] Step 600': repeat the above steps 300' to 500' for the second light-emitting layer and the third light-emitting layer, and respectively form the second light-emitting layer, the second electrode 63 and the first encapsulation layer 7 in the second opening 200, and form the third light-emitting layer, the second electrode 63 and the first encapsulation layer 7 in the third opening.

[0133] Step 700 ′: forming a first auxiliary layer 8 on a side of the first encapsulation layer 7 away from the display function layer 6 in the first opening 100 , the second opening 200 and the third opening. The first auxiliary layer 8 at least partially fills the second groove 701 .

[0134] In this embodiment, the pixel definition layer 4 and isolation structure 5 corresponding to the single-color light-emitting layer 62 are sequentially formed. This can prevent the structure of other single-color light-emitting layers 62 from being affected when forming the single-color light-emitting layer 62. Furthermore, when etching the stacked light-emitting layer 62 and the second electrode 63 using a photolithography process, the etching effect is better on the flat surface because there are no uneven surfaces of the pixel definition layer 4 and isolation structure 5.

[0135] The present application also provides a display device, comprising the display panel provided in the aforementioned embodiment. The display device has the advantages of the display panel in the aforementioned embodiment, and therefore will not be described in detail here.

[0136] It should be noted that the display device can be any device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is contemplated that embodiments may be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0137] The above embodiments of the present application can complement each other if no conflict occurs.

[0138] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0139] The terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on this application.

[0140] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0141] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0142] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A display panel, comprising a display area and a frame area surrounding the display area, characterized in that: The display panel comprises: substrate; A display function layer, located in the display area, includes a plurality of light-emitting elements arranged in an array, each light-emitting element includes a first electrode, a light-emitting layer, and a second electrode sequentially stacked on the substrate; An isolation structure, arranged in an array alternately with the plurality of light-emitting elements on the substrate, wherein a surface of the isolation structure extending in a direction perpendicular to the substrate has a first groove; A first encapsulation layer, covering the display function layer, wherein a second groove is formed in an edge region of the first encapsulation layer close to the isolation structure; in a direction from the isolation structure to the substrate, the first encapsulation layer is at least partially covered by the isolation structure; The first auxiliary layer is located at a side of the first encapsulation layer away from the display function layer, and at least partially fills the second groove.

2. The display panel according to claim 1, characterized in that: Two adjacent isolation structures form a first opening, the light-emitting layer and the second electrode are located in the first opening, the isolation structure is provided with a conductive portion, two adjacent second electrodes are separated by the isolation structure, and the second electrode overlaps the conductive portion of the isolation structure.

3. The display panel according to claim 2, characterized in that: The display panel also includes a pixel definition layer; The pixel definition layer is disposed on a side of the isolation structure facing the substrate, and the pixel definition layer includes a plurality of pixel definition units arranged in an array; Along a direction perpendicular to the substrate, an orthographic projection of the isolation structure on the substrate is located within an orthographic projection of the pixel definition unit on the substrate.

4. The display panel according to claim 3, characterized in that: A second opening is formed between two adjacent pixel definition units, the second opening is located within the first opening, and the opening direction of the second opening is the same as the opening direction of the first opening; the first electrode is arranged on the side of the second opening facing the substrate, a plurality of the first electrodes are respectively connected to the light-emitting layer, and two adjacent first electrodes are separated by the pixel definition layer.

5. The display panel according to claim 3, characterized in that: Along a direction perpendicular to the substrate, an orthographic projection of the isolation structure on the substrate has no overlap with an orthographic projection of the light-emitting layer on the substrate.

6. The display panel according to claim 1, characterized in that: The first auxiliary layer is made of a light-transmitting material, and at least a portion of the first auxiliary layer is disposed on a side of the display function layer away from the substrate; Along a direction perpendicular to the substrate, an orthographic projection of the first auxiliary layer on the substrate at least partially covers an orthographic projection of an edge region of the display function layer close to the isolation structure on the substrate.

7. The display panel according to claim 6, characterized in that: The display panel further includes a second auxiliary layer, and the second auxiliary layer is made of a light-transmitting material; The second auxiliary layer is disposed on a side of the first auxiliary layer away from the substrate, and a refractive index of the second auxiliary layer is not equal to a refractive index of the first auxiliary layer.

8. The display panel according to claim 7, characterized in that: The display panel also includes a first shading layer and a first planarization layer which are sequentially arranged on a side of the second auxiliary layer away from the first auxiliary layer, the first shading layer includes a plurality of first shading units which are spaced apart from each other, the first planarization layer is at least partially arranged in a first spacing area between two adjacent first shading units, and along a direction perpendicular to the substrate, an orthographic projection of the first spacing area on the substrate at least partially covers an orthographic projection of the light-emitting layer on the substrate.

9. The display panel according to claim 8, characterized in that: The display panel also includes a second shading layer and a second planarizing layer stacked in sequence on the first planarizing layer, the second shading layer includes a plurality of second shading units arranged at intervals, the second planarizing layer is at least partially arranged in a second spacing area between two adjacent second shading units, along a direction perpendicular to the substrate, an orthographic projection of the second spacing area on the substrate at least partially covers an orthographic projection of the light-emitting layer on the substrate, wherein the orthographic projection of the second shading unit on the substrate covers and is larger than the orthographic projection of the first shading unit on the substrate.

10. The display panel according to claim 8, characterized in that: The display panel also includes a first light adjustment layer and a second light adjustment layer stacked in sequence on the first planarization layer. Along the direction perpendicular to the substrate, the overlapping area of ​​the orthographic projection of the first light adjustment layer on the substrate and the orthographic projection of the second light adjustment layer on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate.

11. The display panel according to claim 7, characterized in that: The display panel also includes a filter layer stacked on the second auxiliary layer, the filter layer includes alternatingly arranged shading units and filter units, and along a direction perpendicular to the substrate, the orthographic projection of the filter unit on the substrate at least partially covers the orthographic projection of the light-emitting layer on the substrate.

12. The display panel according to claim 1, characterized in that: In a direction from the substrate to the display function layer, a projection area of ​​the orthographic projection of the isolation structure on the substrate gradually increases; Or, the isolation structure comprises a first isolation portion and a second isolation portion sequentially stacked on the substrate, and along a direction perpendicular to the substrate, an orthographic projection of an end surface of the first isolation portion facing the second isolation portion on the substrate is within an orthographic projection of the second isolation portion on the substrate; Alternatively, the isolation structure includes a third isolation portion, a first isolation portion, and a second isolation portion stacked in sequence on the substrate, and along a direction perpendicular to the substrate, the orthographic projection of the second isolation portion on the substrate is located within the orthographic projection of the third isolation portion on the substrate, and the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate.

13. The display panel according to claim 1, characterized in that: The first encapsulation layer is also located in the frame area, and along the direction from the display function layer to the substrate, the projection area of ​​the orthographic projection of the first encapsulation layer on the substrate gradually increases.

14. A method for preparing a display panel, characterized in that: include A driving circuit layer and a planarization layer are stacked on the substrate; forming a first electrode on the planarization layer; forming a pixel definition layer on the first electrode, wherein the pixel definition layer comprises a plurality of pixel definition units arranged at intervals; An isolation structure is formed on the pixel definition unit, wherein a surface of the isolation structure extending in a direction perpendicular to the substrate has a first groove, and a first opening is formed between two adjacent isolation structures; A light-emitting layer, a second electrode and a first encapsulation layer are stacked in the first opening, a second groove is formed in the edge area of ​​the first encapsulation layer close to the isolation structure; in a direction from the isolation structure to the substrate, the first encapsulation layer is at least partially covered by the isolation structure; A first auxiliary layer is formed on a side of the first encapsulation layer away from the display function layer, and the first auxiliary layer at least partially fills the second groove.

15. The display panel according to claim 14, characterized in that: In a direction parallel to the substrate, the first opening includes a first sub-opening, a second sub-opening and a third sub-opening arranged in an array, the light-emitting layer includes a first light-emitting layer, a second light-emitting layer and a third light-emitting layer arranged in an array, the first sub-opening, the second sub-opening and the third sub-opening correspond to the first light-emitting layer, the second light-emitting layer and the third light-emitting layer respectively, and the first light-emitting layer, the second light-emitting layer and the third light-emitting layer emit light of different colors; wherein the light-emitting layer, the second electrode and the first encapsulation layer are stacked in the first opening and include: The first light-emitting layer in the first sub-opening, the second light-emitting layer in the second sub-opening, the third light-emitting layer in the third sub-opening, and the second electrode and the first packaging layer in the first opening are sequentially formed by using a photolithography process.

16. The display panel according to claim 14, characterized in that: After forming the first auxiliary layer on the side of the first encapsulation layer away from the display function layer, the method further includes: A second auxiliary layer is formed on the first auxiliary layer, wherein a refractive index of the second auxiliary layer is not equal to a refractive index of the first auxiliary layer.

17. A display device, characterized in that: It comprises the display panel as claimed in any one of claims 1 to 13.

Images