Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device, and solves the problem of low reliability of a display panel in the prior art. The display panel includes: a substrate; the dam is located on the base plate; the isolation structure surrounds the isolation structure, and at least one isolation opening is defined by the isolation structure; the isolation structure comprises a first part and a second part which are stacked, the first part is located on the side, close to the substrate, of the second part, and the orthographic projection of the first part on the substrate is located in the orthographic projection range of the second part on the substrate; the at least one protection part is located on the substrate and located between the dam and the isolation structure; the protection part comprises a first sub-protection part and a second sub-protection part which are stacked, the first sub-protection part is located on the side, close to the substrate, of the second sub-protection part, and the orthographic projection of the first sub-protection part on the substrate is located in the orthographic projection range of the second sub-protection part on the substrate; the first sub-protection part and at least part of the first part are in the same layer and made of the same material, and the second sub-protection part and the second part are in the same layer and made of the same material.

Description

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] In the traditional display panel manufacturing process, the patterning of luminous pixels is usually achieved through a fine metal mask (FMM). FMM technology is mature and has rich experience in mass production. However, FMM technology also has problems such as limited precision, high development costs, and long development cycles. The fine metal mask-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance, and has the advantages of high performance, full-area size, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A record the relevant content of the fine metal mask-free technology for reference.

[0003] However, the display panel manufactured based on the non-fine metal mask technology has low reliability. Summary of the Invention

[0004] In view of this, embodiments of the present application provide a display panel and a method for manufacturing the same, as well as a display device, which solve the problem of low reliability of display panels in the prior art.

[0005] In a first aspect, the present application provides a display panel comprising: a substrate; a dam located on the substrate; an isolation structure located on the substrate, the dam surrounding the isolation structure, and the isolation structure enclosing at least one isolation opening; the isolation structure comprising a first and a second overlapping portion, the first portion being located on a side of the second portion close to the substrate, and the orthographic projection of the first portion on the substrate being within the range of the orthographic projection of the second portion on the substrate; and at least one protective portion being located on the substrate and between the dam and the isolation structure; the protective portion comprising a first and a second overlapping sub-protecting portion, the first sub-protecting portion being located on a side of the second sub-protecting portion close to the substrate, and the orthographic projection of the first sub-protecting portion on the substrate being within the range of the orthographic projection of the second sub-protecting portion on the substrate; the first sub-protecting portion and at least a portion of the first portion being in the same layer and made of the same material as the first portion, and the second sub-protecting portion being in the same layer and made of the same material as the second portion.

[0006] In combination with the first aspect, in some possible implementations, the protective portion at least partially surrounds the isolation structure; preferably, the orthographic projection of the protective portion on the substrate includes any one of a ring shape and a mesh shape; preferably, the protective portion includes a plurality of through holes, and the plurality of through holes are arranged around the isolation structure; preferably, the protective portion includes a plurality of island structures, and the plurality of island structures are arranged at intervals around the isolation structure.

[0007] In combination with the first aspect, in some possible implementations, the protection portion further includes a third sub-protection portion, which is located on the side of the first sub-protection portion close to the substrate, and the orthographic projection of the first sub-protection portion on the substrate is located within the range of the orthographic projection of the third sub-protection portion on the substrate.

[0008] In combination with the first aspect, in some possible implementations, 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 first part on the substrate is located within the range of the orthographic projection of the third part on the substrate; the third part and the third sub-protection part are on the same layer and made of the same material.

[0009] In combination with the first aspect, in some possible implementations, the third sub-protection portion and the first sub-protection portion are an integrated structure, and the third sub-protection portion and the first sub-protection portion as a whole are on the same layer as the first portion; at least one protection portion includes a first protection portion, and in a cross section perpendicular to the substrate, the third sub-protection portion of the first protection portion is connected to the first portion; preferably, at least one protection portion also includes a second protection portion, and the second protection portion surrounds the first protection portion; in a cross section perpendicular to the substrate, the third sub-protection portion of the second protection portion is connected to the third sub-protection portion of the first protection portion.

[0010] In combination with the first aspect, in some possible implementations, the display panel further includes a plurality of light-emitting devices and a plurality of packaging parts, at least part of the light-emitting device is located in the isolation opening, and the packaging part is located on the side of the light-emitting device facing away from the substrate; the plurality of light-emitting devices include a plurality of first light-emitting devices; the plurality of light-emitting devices are arranged in an array, and the packaging parts of the plurality of first light-emitting devices on the periphery facing away from the substrate extend to the side of the protection part facing away from the substrate, and are connected to form a first whole on the periphery of the isolation structure, and the positive projection of the first whole on the substrate is annular; preferably, the display panel further includes a first redundant light-emitting part, and the first redundant light-emitting part is located between the first whole and the third sub-protection part; the light-emitting part of the first light-emitting device and the first redundant light-emitting part are in the same layer and made of the same material; preferably, the first light-emitting device includes any one of a red light-emitting device, a green light-emitting device and a blue light-emitting device.

[0011] In combination with the first aspect, in some possible implementations, the multiple light-emitting devices also include multiple second light-emitting devices, and the packaging parts of the multiple peripheral second light-emitting devices on the side facing away from the substrate extend to the side of the first whole facing away from the substrate, and are connected to form a second whole on the side of the first whole facing away from the substrate; preferably, the display panel also includes a second redundant light-emitting part, and the second redundant light-emitting part is located between the first whole and the second whole; the light-emitting part of the second light-emitting device and the second redundant light-emitting part are in the same layer and made of the same material; preferably, the second light-emitting device and the first light-emitting device have different colors.

[0012] In combination with the first aspect, in some possible implementations, the multiple light-emitting devices also include multiple third light-emitting devices, and the packaging parts of the multiple peripheral third light-emitting devices on the side facing away from the substrate extend to the side of the second whole facing away from the substrate, and are connected to form a third whole on the side of the second whole facing away from the substrate; preferably, the display panel also includes a third redundant light-emitting part, and the third redundant light-emitting part is located between the second whole and the third whole; the light-emitting part of the third light-emitting device and the third redundant light-emitting part are in the same layer and made of the same material; preferably, the colors of the first light-emitting device, the second light-emitting device and the third light-emitting device are different.

[0013] In combination with the first aspect, in some possible implementations, the encapsulation parts of the multiple first light-emitting devices facing away from the substrate are disconnected on the side of the isolation structure facing away from the substrate; preferably, the display panel also includes an organic encapsulation layer, the organic encapsulation layer is located on the side of the encapsulation part and the isolation structure facing away from the substrate, and the edge of the organic encapsulation layer ends at the side of the dam close to the protective part; preferably, the display panel also includes an inorganic encapsulation layer, the inorganic encapsulation layer is located on the side of the organic encapsulation layer facing away from the substrate, and the orthographic projection of the inorganic encapsulation layer on the substrate covers the orthographic projection of the organic encapsulation layer on the substrate.

[0014] In combination with the first aspect, in some possible implementations, at least one protective portion includes a third protective portion closest to the dam; the substrate includes a substrate and a plurality of organic layers stacked in a direction away from the substrate, and the orthographic projection of the edge of the organic layer on the substrate coincides with the orthographic projection of the side wall of the third protective portion close to the dam on the substrate; preferably, the dam includes a plurality of stacked sub-portions, and at least some of the sub-portions are on the same layer as the organic layer.

[0015] In combination with the first aspect, in some possible implementations, the display panel further includes a pixel definition layer, which is located between the substrate and the isolation structure. The pixel definition layer is a continuous structure, with part of the pixel definition layer located between the protective portion and the substrate, and part of the pixel definition layer located on the side of the dam away from the substrate; preferably, the pixel definition layer encloses a pixel opening, and the pixel opening and the isolation opening are connected; preferably, the material of the pixel definition layer includes an inorganic material.

[0016] In combination with the first aspect, in some possible implementations, at least one protective portion includes a first protective portion; the display panel also includes a first metal wire, and a first spacing area is provided between the orthographic projection of the first protective portion on the substrate and the orthographic projection of the isolation structure on the substrate, and the orthographic projection of the first metal wire on the substrate covers the first spacing area; preferably, at least one protective portion also includes a second protective portion, and the second protective portion surrounds the first protective portion; the display panel also includes a second metal wire, and a second spacing area is provided between the orthographic projection of the first protective portion on the substrate and the orthographic projection of the second protective portion on the substrate, and the orthographic projection of the second metal wire on the substrate covers the second spacing area; preferably, the light-emitting device includes a first electrode and a light-emitting portion, the first electrode is located on the side of the light-emitting portion close to the substrate, and the first electrode, the first metal wire, and the second metal wire are in the same layer and made of the same material; preferably, the light-emitting device also includes a second electrode, the second electrode is located on the side of the light-emitting portion away from the substrate, and the second electrode overlaps the isolation structure.

[0017] The second aspect of the present application provides another display panel, comprising: a substrate; an isolation structure located on the substrate; the isolation structure encloses an isolation opening, the isolation structure comprising a first and a second stacked portion, the first portion being located on a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate being located within the range of the orthographic projection of the second portion on the substrate; a light-emitting device at least partially located within the isolation opening; an encapsulation portion located on a side of the light-emitting device facing away from the substrate; and a first reinforcement portion located on an outer side wall of the isolation structure, the first reinforcement portion and the encapsulation portion being made of the same material.

[0018] In combination with the second aspect, in some possible implementations, the light-emitting device includes a light-emitting portion; the display panel also includes a second reinforcement portion, the second reinforcement portion is located on the side of the first reinforcement portion away from the isolation structure, and the second reinforcement portion and the light-emitting portion are made of the same material; preferably, the orthographic projection of the first reinforcement portion on the substrate and the orthographic projection of the second reinforcement portion on the substrate are located within the range of the orthographic projection of the second portion on the substrate; preferably, the first reinforcement portion covers a portion of the surface of the second portion facing the substrate, the side wall of the first portion and a portion of the surface of the substrate.

[0019] The third aspect of the present application provides a method for preparing a display panel, including: preparing a dam and a first electrode on a substrate; sequentially preparing a first isolation material layer and a second isolation material layer on the side of the dam facing away from the substrate; patterning the second isolation material layer to form a plurality of first through holes and a plurality of first annular holes, the first annular holes surrounding the through holes, the first isolation material layer exposed by the through holes and the first annular holes being partially removed, and the first isolation material layer forming side grooves below the through holes and the first annular holes; patterning the first isolation material layer to form a plurality of second through holes, the second through holes being connected to the first through holes and forming an isolation opening; preparing a light-emitting portion and a second electrode in the isolation opening, the stacked first electrode, the light-emitting portion and the second electrode forming a first light-emitting device.

[0020] In combination with the third aspect, in some possible implementations, the first isolation material layer is patterned to form a plurality of second through holes while also forming a plurality of second annular holes. The second annular holes and the first annular holes are connected to form annular holes. The remaining first isolation material layer and the second isolation material layer constitute an isolation structure and at least one protective portion. The isolation structure encloses the isolation opening, and the protective portion surrounds the isolation structure.

[0021] In combination with the third aspect, in some possible implementations, the preparation method also includes: preparing a packaging material layer on the side of the first light-emitting device facing away from the substrate; performing patterning on the packaging material layer to obtain multiple packaging parts, and the packaging part of the outer first light-emitting device facing away from the substrate extends to the second isolation material layer covering the periphery of the annular hole; preferably, preparing the light-emitting part in the isolation opening includes: preparing a light-emitting functional material layer on the side of the second isolation material layer facing away from the substrate; performing patterning on the light-emitting functional material layer to obtain a light-emitting part and a redundant light-emitting part, and the redundant light-emitting part is located in the annular hole.

[0022] In a fourth aspect, the present application provides a display device, comprising a display panel provided by any of the above embodiments, or a display panel obtained by executing the preparation method provided by any of the above embodiments.

[0023] According to the display panel, manufacturing method thereof, and display device provided in the embodiments of the present application, a protective portion is provided between the dam and the isolation structure, thereby strengthening the bonding force between the evaporated film layers and reducing the risk of film separation between adjacent evaporated film layers. Alternatively, a reinforcing portion is provided between the dam and the isolation structure, thereby protecting the peripheral sidewalls of the isolation structure and preventing the wet etching process from increasing the amount of side etching on the peripheral sidewalls of the isolation structure, thereby reducing the risk of film separation between adjacent evaporated film layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic top view of the display panel provided in the first embodiment of the present application.

[0025] Figure 2 for Figure 1 The figure shows a schematic diagram of the cross-sectional structure of the display panel along line A1A2.

[0026] Figure 3 This is a partially enlarged view of the top view structure of the display panel provided in the second embodiment of the present application.

[0027] Figure 4 This is a partially enlarged view of the top view structure of the display panel provided in the third embodiment of the present application.

[0028] Figure 5 This is a schematic cross-sectional structural diagram of a display panel provided in the fourth embodiment of the present application.

[0029] Figure 6 This is a schematic cross-sectional structural diagram of a display panel provided in the fifth embodiment of the present application.

[0030] Figure 7 This is a schematic cross-sectional structural diagram of a display panel provided in the sixth embodiment of the present application.

[0031] Figure 8 This is a schematic cross-sectional structural diagram of a display panel provided in the seventh embodiment of the present application.

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure of a display panel provided in the eighth embodiment of the present application.

[0033] Figure 10 A schematic flow chart of a method for manufacturing a display panel provided in one embodiment of the present application.

[0034] Figure 11 A schematic structural diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] As mentioned in the background technology, the non-fine metal mask technology eliminates the limitations of traditional OLED processes on display screen size, resolution and other screen performance, and has the advantages of high performance, full-domain size, and agile delivery. However, in the display panel prepared based on the non-fine metal mask technology in the related art, on the one hand, there is a large flat area between the dam and the display area. During the preparation of the display panel, adjacent evaporated film layers, such as inorganic packaging layers, light-emitting functional layers, etc., are prone to film separation in this flat area. On the other hand, during the wet etching process of pixel graphics, the side etching amount of the outer side wall of the isolation structure continues to increase, further leading to the separation of adjacent evaporated film layers between the dam and the display area. Furthermore, after the film layer is separated, the wet etching process will damage the pixel definition layer and the conductive layer in the flat area, causing the organic packaging layer and the planarization layer to be connected, which in turn leads to reliability anomalies, touch crosstalk and other problems, affecting the reliability of the display panel.

[0036] In view of this, embodiments of the present application provide a display panel, a method for manufacturing the same, and a display device. By providing a protective portion between the dam and the isolation structure, the protective portion strengthens the bonding between the vapor-deposited film layers, thereby reducing the risk of film separation between adjacent vapor-deposited film layers. Alternatively, by providing a reinforcing portion between the dam and the isolation structure, the reinforcing portion protects the peripheral sidewalls of the isolation structure, thereby preventing the wet etching process from increasing the amount of side etching on the peripheral sidewalls of the isolation structure, thereby reducing the risk of film separation between adjacent vapor-deposited film layers.

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It will be understood that when a structure is referred to as being "on or under" another structure, the structure may be directly above or below the other structure, or intervening structures may be present. Like reference numerals refer to like structures throughout. References to structures herein include any of layers, elements, devices, components, and assemblies.

[0039] When a structure is referred to as being "connected" to another structure, the structure can be directly connected to the other structure or indirectly connected to the other structure with one or more intervening structures interposed therebetween.

[0040] In this specification, "electrically connected" includes components connected together via an element having some electrical function. There are no particular limitations on the "element having some electrical function" as long as it enables the transfer of electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0041] In this specification, the term “same-layer arrangement” refers to a structure in which two (or more) structures are formed by the same patterning process, and their materials may be the same or different.

[0042] In a first aspect, the present application provides a display panel. Figure 1 This is a schematic top view of the display panel provided in the first embodiment of the present application. Figure 2 for Figure 1 The cross-sectional structure diagram of the display panel along the A1A2 line is shown. Figure 1 and Figure 2As shown, the display panel includes: a substrate 10, a dam 20, an isolation structure 30, and at least one protective portion 40. The dam 20 is located on the substrate 10. The isolation structure 30 is located on the substrate 10, and the dam 20 surrounds the isolation structure 30. The isolation structure 30 encloses at least one isolation opening H1. The isolation structure 30 includes a first portion 31 and a second portion 32 stacked together. The first portion 31 is located on the side of the second portion 32 closer to the substrate 10, and the orthographic projection of the first portion 31 on the substrate 10 is within the orthographic projection of the second portion 32 on the substrate 10. The protective portion 40 is located on the substrate 10 and between the dam 20 and the isolation structure 30. The protective portion 40 includes a first sub-protecting portion 41 and a second sub-protecting portion 42 stacked together. The first sub-protecting portion 41 is located on the side of the second sub-protecting portion 42 closer to the substrate 10, and the orthographic projection of the first sub-protecting portion 41 on the substrate 10 is within the orthographic projection of the second sub-protecting portion 42 on the substrate 10. The first sub-protecting portion 41 and at least a portion of the first portion 31 are in the same layer and made of the same material as the first portion 31 . The second sub-protecting portion 42 and the second portion 32 are in the same layer and made of the same material.

[0043] The substrate 10 may be an array substrate or a base substrate. The array substrate includes a base substrate and a pixel circuit array formed on the base substrate. In some embodiments, the base substrate may be a glass-based substrate. In some embodiments, the base substrate may include an organic resin material such as epoxy resin, triazine, silicone resin, or polyimide. In some embodiments, the base substrate may include a ceramic material such as silicon nitride, aluminum nitride, or aluminum oxide, or may include a metal or a metal compound.

[0044] The dam 20 surrounds the isolation structure 30. The dam 20 is used to prevent overflow of the organic encapsulation material. The number of dams 20 can be one or more. In the case of multiple dams 20, for example, the multiple dams 20 include a first dam and a second dam, where the first dam surrounds the isolation structure 30 and the second dam surrounds the first dam.

[0045] The isolation structure 30 encloses an isolation opening H1, which serves as a light outlet. The isolation structure 30 also serves to separate the film layer formed thereon. For example, the sidewalls of the isolation structure 30 are concave, and the film layer deposited above the isolation structure will automatically break apart at the isolation structure. In this case, the evaporated film layer is broken into multiple independent evaporated portions located within different isolation openings H1.

[0046] The isolation structure 30 includes a stacked first portion 31 and a second portion 32. The second portion 32 is located on the side of the first portion 31 facing away from the substrate 10, and the orthographic projection of the first portion 31 on the substrate 10 is located within the orthographic projection of the second portion 32 on the substrate 10. In this case, the cross-sectional shape of the isolation structure 30 in the direction perpendicular to the display panel can be T-shaped. For example, the first portion 31 can be a single material layer, such as an aluminum layer, or a laminated composite structure, such as an aluminum layer and a molybdenum layer, with the molybdenum layer located on the side of the aluminum layer closer to the substrate 10. The material of the second portion 32 can be titanium.

[0047] Typically, a display panel includes a display area AA and a border area NA surrounding the display area AA. The isolation structure 30 is located in the display area AA, and the periphery of the isolation structure 30 is defined as the border area NA. In this case, the protective portion 40 is located between the dam 20 and the isolation structure 30, that is, the protective portion 40 is located in the border area NA.

[0048] The protective portion 40 is used to enhance the bonding force between adjacent evaporated film layers on the side of the protective portion 40 facing away from the substrate 10, thereby reducing the risk of film separation. In this embodiment, the protective portion 40 includes a stacked first sub-protective portion 41 and a second sub-protective portion 42. The first sub-protective portion 41 is located on the side of the second sub-protective portion 42 closer to the substrate 10, and the orthographic projection of the first sub-protective portion 41 on the substrate 10 is within the range of the orthographic projection of the second sub-protective portion 42 on the substrate 10. The first sub-protective portion 41 and at least a portion of the first portion 31 are in the same layer and made of the same material as the first portion 31, and the second sub-protective portion 42 and the second portion 32 are in the same layer and made of the same material. Exemplarily, the first sub-protective portion 41 and the first portion 31 are in the same layer and made of the same material, and the second sub-protective portion 42 and the second portion 32 are in the same layer and made of the same material. In this case, the protective portion 40 and the isolation structure 30 can be manufactured simultaneously. Exemplarily, the first sub-protective portion 41 and a portion of the first portion 31 are in the same layer and made of the same material as the first portion 31, and the second sub-protective portion 42 and the second portion 32 are in the same layer and made of the same material. In this case, the protection portion 40 can be obtained during the preparation process of the isolation structure 30 , or in other words, the protection portion 40 can be regarded as a semi-finished product of the isolation structure 30 .

[0049] The display panel provided in this embodiment provides a protective portion 40 between the dam 20 and the isolation structure 30. This portion strengthens the bonding between the vapor-deposited film layers and reduces the risk of separation between adjacent vapor-deposited film layers. Furthermore, the protective portion 40 can be formed during the preparation of the isolation structure 30, eliminating the need for additional process steps and making it easy to implement.

[0050] In one embodiment, Figure 2As shown, the display panel also includes a light-emitting device 50, at least part of which is located within the isolation opening H1. For example, the light-emitting device 50 can be an organic light-emitting diode (OLED), a micro light-emitting diode (Micro LED), a quantum dot light-emitting diode (QLED), etc. The color of the light-emitting device can be reasonably selected according to actual needs. For example, the display panel includes multiple light-emitting devices 50 of different colors, such as a red light-emitting device R, a green pixel G, a blue pixel B, etc.

[0051] The light-emitting device 50 includes a first electrode 51, a light-emitting portion 52, and a second electrode 53 stacked in sequence in a direction away from the substrate 10. The second electrode 53 overlaps the isolation structure 30. Exemplarily, the first electrode 51 is a cathode and the second electrode 53 is an anode. Alternatively, the first electrode 51 is an anode and the second electrode 53 is a cathode. The light-emitting portion 52 includes a light-emitting layer and may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron blocking layer (EBL) located between the anode and the light-emitting layer, and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL) located between the cathode and the light-emitting layer.

[0052] like Figure 1 As shown, a plurality of light-emitting devices 50 are arranged in an array. The plurality of light-emitting devices 50 include peripheral light-emitting devices 50 and a central light-emitting device 50, and the central light-emitting device 50 is surrounded by the peripheral light-emitting devices 50. The peripheral light-emitting devices 50 refer to the light-emitting devices 50 closest to the protective portion 40, that is, the light-emitting devices 50 in the outermost circle. Exemplarily, the virtual connecting line of the centroid of the peripheral light-emitting devices 50 is a ring. Depending on the pixel arrangement, the peripheral light-emitting devices 50 can be light-emitting devices of the same color, or can include light-emitting devices 50 of multiple different colors. Exemplarily, the display panel adopts a standard RGB pixel arrangement. In this case, the peripheral light-emitting devices 50 include a first light-emitting device 510, a second light-emitting device 520, and a third light-emitting device 530, each emitting different colors. Exemplarily, the first light-emitting device 510 includes a red light-emitting device, the second light-emitting device 520 is a green light-emitting device, and the third light-emitting device 530 is a blue light-emitting device. Exemplarily, the display panel adopts a diamond arrangement. In this case, the peripheral light-emitting device 50 includes a first light-emitting device 510 and a third light-emitting device 530. Alternatively, the peripheral light-emitting device 50 includes only the second light-emitting device 520.

[0053] In one embodiment, Figure 2As shown, the display panel further includes a pixel definition layer 60, which is a continuous structure. Pixel definition layer 60 is partially located between substrate 10 and isolation structure 30, partially located between protection portion 40 and substrate 10, and partially located on the side of dam 20 away from substrate 10.

[0054] In one embodiment, Figure 2 As shown, the pixel definition layer 60 encloses a pixel opening H2, which is connected to the isolation opening H1. In this case, a portion of the light-emitting device 50 is located within the pixel opening H2, and a portion extending outside the pixel opening H2 is located within the isolation opening H1. Exemplarily, the material of the pixel definition layer 60 includes an inorganic material.

[0055] In this embodiment, if Figure 1 As shown, the protection portion 40 surrounds the isolation structure 30. For example, the orthographic projection of the protection portion 40 on the substrate 10 includes a ring shape. The ring shape can be a circular ring, a rectangular ring, etc., and can be reasonably set according to the shape of the display panel.

[0056] Figure 3 This is a partial enlarged view of the top view structure of the display panel provided in the second embodiment of the present application. Figure 3 The display panel and Figure 1 、 Figure 2 The difference between the display panel shown is that, in this embodiment, the protection portion 40 surrounds the isolation structure 30, and the orthographic projection of the protection portion 40 on the substrate 10 is in the shape of a mesh. That is, the protection portion 40 includes a plurality of through holes G, which can be patterned synchronously with the isolation opening H1. For example, Figure 3 As shown, a plurality of through holes G are arranged around the isolation structure 30 .

[0057] Figure 4 This is a partial enlarged view of the top view structure of the display panel provided in the third embodiment of the present application. Figure 4 The display panel and Figure 1-Figure 3 The difference of the display panel shown is that, in this embodiment, the protection portion 40 partially surrounds the isolation structure 30. The protection portion 40 includes a plurality of island structures 400, which are arranged around the isolation structure 30 at intervals.

[0058] Figure 5 This is a schematic diagram of the cross-sectional structure of a display panel provided in the fourth embodiment of the present application. Figure 5 The display panel and Figures 1-4 The difference between the display panels shown is that, in this embodiment, the protective portion 40 also includes a third sub-protective portion 43, which is located on the side of the first sub-protective portion 41 close to the substrate 10, and the orthographic projection of the first sub-protective portion 41 on the substrate 10 is located within the range of the orthographic projection of the third sub-protective portion 43 on the substrate 10.

[0059] Exemplarily, the isolation structure 30 further includes a third portion 33, which is located on the side of the first portion 31 closer to the substrate 10. The orthographic projection of the first portion 31 on the substrate 10 is within the orthographic projection of the third portion 33 on the substrate 10. The third portion 33 and the third sub-protective portion 43 are formed from the same layer and the same material.

[0060] Figure 6 This is a schematic diagram of the cross-sectional structure of a display panel provided in the fifth embodiment of the present application. Figure 6 The display panel and Figure 5 The difference between the display panel shown is that, in this embodiment, the third sub-protecting portion 43 and the first sub-protecting portion 41 are integrally formed, and the entire third sub-protecting portion 43 and the first sub-protecting portion 41 are co-located with the first portion 31. The at least one protecting portion 40 includes a first protecting portion 410, and in a cross section perpendicular to the substrate 10, the third sub-protecting portion 43 of the first protecting portion 410 is connected to the first portion 31.

[0061] In one embodiment, Figure 6 As shown, at least one protective portion 40 further includes a second protective portion 420, which surrounds the first protective portion 410. In a cross section perpendicular to the substrate 10, the third sub-protecting portion 43 of the second protective portion 420 is connected to the third sub-protecting portion 43 of the first protective portion 410. In this case, the first portion 31 extends to the border area NA, where the first portion 31 is partially etched to form the third sub-protecting portion 43. The combined thickness of the first sub-protecting portion 41 and the third sub-protecting portion 43 is equal to the thickness of the first portion 31.

[0062] According to the display panel provided in this embodiment, by setting the third sub-protection portion 43 in the border area NA, the third sub-protection portion 43 can consume part of the etching solution in the subsequent wet etching process, thereby avoiding that all the etching solution is used to form side etching on the first sub-protection portion 41, thereby reducing the amount of side etching on the first sub-protection portion 41, and further ensuring the continuity of the film layer subsequently deposited in the border area NA, so that the bonding force between the deposited film layer and the adjacent film layer is better, avoiding the problem of film layer separation.

[0063] In one embodiment, Figure 6As shown, at least one protective portion 40 includes a third protective portion 430 closest to the dam 20. The substrate 10 includes a substrate 11 and multiple organic layers 12 stacked in a direction away from the substrate 11. The orthographic projection of the edge of the organic layer 12 on the substrate 11 coincides with the orthographic projection of the sidewall of the third protective portion 430 near the dam 20 on the substrate 10. It should be noted that the third protective portion 430 is merely for ease of distinction and does not limit the number of protective portions 40 to three. The number of protective portions 40 can be any positive integer. Thus, an organic clearance region S is formed between the third protective portion 430 and the dam 20. The organic clearance region S is free of organic layers 12, and a side edge of the third protective portion 430 coincides with a side boundary of the organic clearance region S.

[0064] In one embodiment, Figure 6 As shown, the dam 20 includes a plurality of stacked sub-portions, at least some of which are formed in the same layer as the organic layer 12 .

[0065] In one embodiment, Figure 6 As shown, the display panel further includes a first metal line 91 , and a first spacing area is provided between the orthographic projection of the first protection portion 410 on the substrate 10 and the orthographic projection of the isolation structure 30 on the substrate 10 , and the orthographic projection of the first metal line 91 on the substrate 10 covers the first spacing area.

[0066] In one embodiment, Figure 6 As shown, the display panel further includes a second metal line 92 , and a second spacing area is provided between the orthographic projection of the first protection portion 410 on the substrate 10 and the orthographic projection of the second protection portion 420 on the substrate 10 , and the orthographic projection of the second metal line 92 on the substrate 10 covers the second spacing area.

[0067] In one embodiment, Figure 6 As shown, the first electrode 51 , the first metal wire 91 , and the second metal wire 92 are in the same layer and made of the same material.

[0068] Figure 7 This is a schematic diagram of the cross-sectional structure of a display panel provided in the sixth embodiment of the present application. Figure 7 The display panel and Figure 6 The difference between the display panel shown in FIG. 1 and FIG. 2 is that, in this embodiment, the display panel further includes multiple encapsulation portions 81, which are located on the side of the light-emitting device 50 facing away from the substrate 10. The multiple light-emitting devices 50 include multiple first light-emitting devices 510. The encapsulation portions 81 of the peripheral multiple first light-emitting devices 510 on the side facing away from the substrate 10 extend to the side of the protective portion 40 facing away from the substrate 10 and are connected to form a first integral body at the periphery of the isolation structure 30. The orthographic projection of the first integral body on the substrate 10 is annular. Exemplarily, the annular shape includes an annular surface.

[0069] In one embodiment, Figure 7As shown, the display panel further includes a first redundant light emitting portion 70, which is located between the first integral portion and the third sub-protection portion 43. The light emitting portion 52 of the first light emitting device 510 and the first redundant light emitting portion 70 are in the same layer and made of the same material.

[0070] In one embodiment, the encapsulation portion 81 of the plurality of first light-emitting devices 510 on a side facing away from the substrate 10 is disconnected at a side of the isolation structure 30 facing away from the substrate 10 .

[0071] In one embodiment, the display panel further includes an organic encapsulation layer 82 , which is located on the side of the encapsulation portion 81 and the isolation structure 30 facing away from the substrate 10 . The edge of the organic encapsulation layer 82 ends at the side of the dam 20 close to the protection portion 40 .

[0072] In one embodiment, the display panel further includes an inorganic encapsulation layer 83 , which is located on the side of the organic encapsulation layer 82 facing away from the substrate 10 . The orthographic projection of the inorganic encapsulation layer 83 on the substrate 10 covers the orthographic projection of the organic encapsulation layer 82 on the substrate 10 .

[0073] Figure 8 This is a schematic diagram of the cross-sectional structure of a display panel provided in the seventh embodiment of the present application. Figure 8 The display panel and Figure 7 The difference of the display panel shown is that, in this embodiment, the multiple light-emitting devices 50 also include multiple second light-emitting devices, and the packaging part 81 of the multiple peripheral second light-emitting devices on the side facing away from the substrate 10 extends to the side of the first whole facing away from the substrate 10, and is connected to form a second whole 820 on the side of the first whole 810 facing away from the substrate 10.

[0074] In one embodiment, the display panel further includes a second redundant light-emitting portion, which is located between the first integral body 810 and the second integral body 820. The light-emitting portion 52 of the second light-emitting device and the second redundant light-emitting portion are in the same layer and made of the same material. The second light-emitting device and the first light-emitting device 510 have different colors.

[0075] In one embodiment, the multiple light-emitting devices 50 also include multiple third light-emitting devices, and the packaging parts 81 of the multiple peripheral third light-emitting devices on the side facing away from the substrate 10 extend to the side of the second whole 820 facing away from the substrate 10, and are connected to form a third whole 830 on the side of the second whole 820 facing away from the substrate 10.

[0076] In one embodiment, the display panel further includes a third redundant light-emitting unit, which is located between the second unit 820 and the third unit 830. The third light-emitting device includes a light-emitting unit in the same layer and made of the same material as the third redundant light-emitting unit. The first, second, and third light-emitting devices have different colors. For example, the first light-emitting device 510 includes a red light-emitting device, the second light-emitting device includes a green light-emitting device, and the third light-emitting device includes a blue light-emitting device.

[0077] A second aspect of the present application provides another display panel. Figure 9 This is a schematic diagram of the cross-sectional structure of the display panel provided in the eighth embodiment of the present application. Figure 9 As shown, the display panel includes: a substrate 10, an isolation structure 30, a light-emitting device 50, an encapsulation portion 81 and a first reinforcement portion 110. The isolation structure 30 is located on the substrate 10. The isolation structure 30 encloses an isolation opening H1. The isolation structure 30 includes a first portion 31 and a second portion 32 stacked together, the first portion 31 being located on a side of the second portion 32 close to the substrate 10, and the orthographic projection of the first portion 31 on the substrate 10 being located within the orthographic projection of the second portion 32 on the substrate 10. The light-emitting device 50 is at least partially located within the isolation opening H1. The encapsulation portion 81 is located on the side of the light-emitting device 50 facing away from the substrate 10. The first reinforcement portion 110 is located on the outer side wall of the isolation structure 30, and the first reinforcement portion 110 and the encapsulation portion 81 are made of the same material.

[0078] Exemplarily, the first reinforcement portion 110 and the encapsulation portion 81 can be prepared simultaneously. Specifically, during the preparation of the display panel, openings (including pixel openings H2 and isolation openings H1) are etched in sequence for light-emitting devices 50 of different colors. In this case, when preparing the light-emitting device 50 of the current color, the area other than the location of the light-emitting device 50 of the current color is roughly flat because there is no opening or it has been filled by the light-emitting device 50. When the encapsulation portion 81 is prepared on the side of the light-emitting device 50 of the current color facing away from the substrate 10, the encapsulation material layer corresponding to the encapsulation portion 81 is easily etched and there will be no side engraving. In this way, the encapsulation material layer at the side-engraved recessed position of the outer side wall of the isolation structure 30 will be retained, thereby forming the first reinforcement portion 110.

[0079] According to the display panel provided in this embodiment, a first reinforcement portion 110 is provided on the outer side wall of the isolation structure 30. The first reinforcement portion 110 is used to protect the outer side wall of the isolation structure 30, thereby avoiding the wet etching process from increasing the side etching amount of the outer side wall of the isolation structure 30, thereby reducing the risk of film layer separation between adjacent evaporated film layers.

[0080] In one embodiment, Figure 9As shown, the light emitting device 50 includes a light emitting portion 52. The display panel further includes a second reinforcing portion 120, which is located on a side of the first reinforcing portion 110 away from the isolation structure 30. The second reinforcing portion 120 and the light emitting portion 52 are made of the same material.

[0081] Exemplarily, the orthographic projection of the first reinforcing portion 110 on the substrate 10 and the orthographic projection of the second reinforcing portion 120 on the substrate 10 are located within the orthographic projection range of the second portion 32 on the substrate 10 .

[0082] Exemplarily, the first reinforcing portion 110 covers a portion of the surface of the second portion 32 facing the substrate 10, a sidewall of the first portion 31, and a portion of the surface of the substrate 10. For example, the first reinforcing portion 110 is U-shaped.

[0083] A third aspect of the present application provides a method for preparing a display panel. Figure 10 A schematic diagram of a process for preparing a display panel according to an embodiment of the present application. Figures 1-8 In this embodiment, the protection portion 40 is obtained during the preparation process of the isolation structure 30. Figure 10 As shown, the method 1000 for manufacturing a display panel includes:

[0084] Step S1010, see Figure 6-Figure 8 In any display panel, a bank 20 and a first electrode 51 are formed on a substrate 10 .

[0085] Step S1020 , sequentially preparing a first isolation material layer and a second isolation material layer on the side of the dam 20 facing away from the substrate 10 .

[0086] Step S1030 , patterning the second isolation material layer to form a plurality of first through holes and a plurality of first annular holes.

[0087] The through hole is located in the display area AA, and is subsequently used to further form the isolation opening H1. The first annular hole is located in the border area NA, and the second isolation material layer outside the first annular hole is used to form the second sub-protection portion 42 of the protection portion 40. The first annular hole surrounds the through hole, and the first isolation material layer exposed by the through hole and the first annular hole is partially removed, and the first isolation material layer forms a side-engraved groove under the through hole and the first annular hole. In other words, in the process of patterning the second isolation material layer, the first isolation material layer will also be partially etched. In the border area NA, the first isolation material layer exposed by the annular hole is partially etched and side etching will be generated to form the first sub-protection portion 41 and the third sub-protection portion 43.

[0088] In step S1040, the first isolation material layer is patterned to form a plurality of second through-holes. The second through-holes communicate with the first through-holes and form an isolation opening H1. Specifically, the first isolation material layer exposed by the first through-holes is etched, and a side etching is formed below the second portion 32 to form the isolation opening H1. During the patterning process, only the first isolation material layer in the display area AA is patterned; the first isolation material layer in the border area NA is not patterned.

[0089] In step S1050 , a light-emitting portion 52 and a second electrode 53 are prepared in the isolation opening H1 . The stacked first electrode 51 , the light-emitting portion 52 and the second electrode 53 constitute a first light-emitting device 510 .

[0090] In one embodiment, see Figure 1-Figure 5 For any display panel, while executing step S1140, multiple second annular holes are simultaneously formed. The second annular holes are connected to the first annular holes to form annular holes. The remaining first and second isolation material layers form at least one protective portion 40 and an isolation structure 30. The isolation structure 30 encloses the isolation opening H1, and the protective portion 40 surrounds the isolation structure 30. In this case, the isolation structure 30 and the protective portion 40 are formed simultaneously.

[0091] In one embodiment, see Figure 7 and Figure 8 The preparation method further includes:

[0092] Prepare an encapsulation material layer on the side of the first light emitting device 510 facing away from the substrate 10;

[0093] The encapsulation material layer is patterned to form a plurality of encapsulation portions 81. The encapsulation portions 81 on the side of the peripheral first light-emitting device 510 facing away from the substrate 10 extend to the second isolation material layer surrounding the annular aperture. In other words, the encapsulation portions 81 on the side of the peripheral first light-emitting device 510 facing away from the substrate 10 form a first integral body 810 in the border area NA.

[0094] In one embodiment, see Figure 7 and Figure 8 Preparing the light-emitting portion 52 in the isolation opening H1 includes: preparing a light-emitting functional material layer on the side of the second isolation material layer facing away from the substrate 10; patterning the light-emitting functional material layer to obtain the light-emitting portion 52 and the redundant light-emitting portion 70, and the redundant light-emitting portion 70 is located in the annular hole.

[0095] A fourth aspect of the present application provides a display device. Figure 11 This is a schematic diagram of the structure of a display device provided in one embodiment of the present application. Figure 11 As shown, the display device 100 includes the display panel provided by any of the above embodiments.

[0096] The display device 100 is a product having an image display function. For example, the display device 100 can be used to display static images, such as pictures or photos. The display device 100 can also be used to display dynamic images, such as videos.

[0097] The display device 100 may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0098] In addition, the display device 100 may also have functions such as taking pictures, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 100 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0099] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0100] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that: include: substrate; a dam located on the substrate; an isolation structure located on the substrate, the dam surrounding the isolation structure, and the isolation structure enclosing at least one isolation opening; the isolation structure comprising a first portion and a second portion stacked together, the first portion being located on a side of the second portion closer to the substrate, and an orthographic projection of the first portion on the substrate being within the range of an orthographic projection of the second portion on the substrate; as well as At least one protective portion is located on the substrate and between the dam and the isolation structure; the protective portion includes a first sub-protection portion and a second sub-protection portion stacked together, the first sub-protection portion is located on a side of the second sub-protection portion close to the substrate, and the orthographic projection of the first sub-protection portion on the substrate is located within the orthographic projection range of the second sub-protection portion on the substrate; the first sub-protection portion and at least part of the first portion are in the same layer and are made of the same material as the first portion, and the second sub-protection portion and the second portion are in the same layer and are made of the same material.

2. The display panel according to claim 1, wherein: The protection portion at least partially surrounds the isolation structure; Preferably, the orthographic projection of the protection portion on the substrate includes any one of a ring shape and a mesh shape; Preferably, the protection portion includes a plurality of through holes, and the plurality of through holes are arranged around the isolation structure; Preferably, the protection portion includes a plurality of island structures, and the plurality of island structures are arranged at intervals around the isolation structure.

3. The display panel according to claim 1, wherein: The protection portion further includes a third sub-protection portion, which is located on a side of the first sub-protection portion close to the substrate, and an orthographic projection of the first sub-protection portion on the substrate is within the orthographic projection range of the third sub-protection portion on the substrate.

4. The display panel according to claim 3, wherein: The isolation structure also includes a third part, which is located on the side of the first part close to the substrate, and the orthographic projection of the first part on the substrate is located within the range of the orthographic projection of the third part on the substrate; the third part and the third sub-protection part are in the same layer and made of the same material.

5. The display panel according to claim 3, wherein: The third sub-protecting portion and the first sub-protecting portion are an integral structure, and the third sub-protecting portion and the first sub-protecting portion are integrally formed with the first portion; at least one of the protecting portions includes a first protecting portion, and in a cross section perpendicular to the substrate, the third sub-protecting portion of the first protecting portion is connected to the first portion; Preferably, at least one of the protecting portions further includes a second protecting portion, which surrounds the first protecting portion; in a cross section perpendicular to the substrate, the third sub-protecting portion of the second protecting portion is connected to the third sub-protecting portion of the first protecting portion.

6. The display panel according to claim 5, wherein: The display panel further includes a plurality of light-emitting devices and a plurality of packaging parts, wherein at least a portion of the light-emitting devices is located within the isolation opening, and the packaging part is located on a side of the light-emitting devices away from the substrate; the plurality of light-emitting devices include a plurality of first light-emitting devices; The plurality of light-emitting devices are arranged in an array, the packaging portion of the plurality of first light-emitting devices on the periphery facing away from the substrate extends to the side of the protection portion facing away from the substrate, and are connected to form a first whole on the periphery of the isolation structure, the orthographic projection of the first whole on the substrate being annular; Preferably, the display panel further includes a first redundant light-emitting portion, which is located between the first integral portion and the third sub-protection portion; the light-emitting portion of the first light-emitting device and the first redundant light-emitting portion are in the same layer and made of the same material; Preferably, the first light-emitting device includes any one of a red light-emitting device, a green light-emitting device and a blue light-emitting device.

7. The display panel according to claim 6, wherein: The plurality of light-emitting devices further include a plurality of second light-emitting devices, wherein the packaging portions of the plurality of peripheral second light-emitting devices on the side away from the substrate extend to the side of the first integral body away from the substrate, and are connected to form a second integral body on the side of the first integral body away from the substrate; Preferably, the display panel further includes a second redundant light-emitting portion, which is located between the first integral body and the second integral body; the light-emitting portion of the second light-emitting device and the second redundant light-emitting portion are in the same layer and made of the same material; Preferably, the second light emitting device and the first light emitting device have different colors.

8. The display panel according to claim 7, wherein: The plurality of light-emitting devices further include a plurality of third light-emitting devices, wherein the packaging portions of the peripheral plurality of third light-emitting devices on a side away from the substrate extend to a side of the second whole away from the substrate, and are connected to form a third whole on a side of the second whole away from the substrate; Preferably, the display panel further comprises a third redundant light-emitting portion, the third redundant light-emitting portion being located between the second integral body and the third integral body; the light-emitting portion of the third light-emitting device and the third redundant light-emitting portion are in the same layer and made of the same material; Preferably, the first light emitting device, the second light emitting device and the third light emitting device have different colors.

9. The display panel according to any one of claims 6 to 8, characterized in that: The encapsulation parts of the plurality of first light-emitting devices on a side facing away from the substrate are disconnected on a side of the isolation structure facing away from the substrate; Preferably, the display panel further comprises an organic encapsulation layer, the organic encapsulation layer is located on a side of the encapsulation portion and the isolation structure away from the substrate, and an edge of the organic encapsulation layer terminates at a side of the dam close to the protection portion; Preferably, the display panel further comprises an inorganic encapsulation layer, which is located on a side of the organic encapsulation layer away from the substrate, and an orthographic projection of the inorganic encapsulation layer on the substrate covers an orthographic projection of the organic encapsulation layer on the substrate.

10. The display panel according to any one of claims 6 to 8, characterized in that: At least one of the protective portions includes a third protective portion closest to the dam; the substrate includes a substrate and a plurality of organic layers stacked in a direction away from the substrate, and an orthographic projection of an edge of the organic layer on the substrate coincides with an orthographic projection of a sidewall of the third protective portion close to the dam on the substrate; Preferably, the dam comprises a plurality of stacked sub-portions, and at least some of the sub-portions are in the same layer as the organic layer.

11. The display panel according to claim 1, wherein The pixel definition layer is located between the substrate and the isolation structure. The pixel definition layer is a continuous structure. Part of the pixel definition layer is located between the protection portion and the substrate, and part of the pixel definition layer is located on a side of the dam away from the substrate. Preferably, the pixel definition layer encloses a pixel opening, and the pixel opening is connected to the isolation opening; Preferably, the material of the pixel definition layer includes an inorganic material.

12. The display panel according to claim 1, wherein At least one of the protection portions includes a first protection portion; the display panel further includes a first metal line, a first spacing area is defined between an orthographic projection of the first protection portion on the substrate and an orthographic projection of the isolation structure on the substrate, and the orthographic projection of the first metal line on the substrate covers the first spacing area; Preferably, at least one of the protection portions further includes a second protection portion, the second protection portion surrounding the first protection portion; the display panel further includes a second metal wire, a second spacing region is defined between an orthographic projection of the first protection portion on the substrate and an orthographic projection of the second protection portion on the substrate, and the orthographic projection of the second metal wire on the substrate covers the second spacing region; Preferably, the display panel further comprises a light-emitting device, at least a portion of which is located within the isolation opening; the light-emitting device comprises a first electrode and a light-emitting portion, the first electrode being located on a side of the light-emitting portion close to the substrate, and the first electrode, the first metal wire, and the second metal wire being in the same layer and made of the same material; Preferably, the light-emitting device further comprises a second electrode, the second electrode is located on a side of the light-emitting portion away from the substrate, and the second electrode overlaps the isolation structure.

13. A display panel, characterized in that: include: substrate; an isolation structure, located on the substrate; The isolation structure encloses an isolation opening, and the isolation structure includes a first portion and a second portion stacked together, wherein the first portion is located on a side of the second portion close to the substrate, and an orthographic projection of the first portion on the substrate is within the range of an orthographic projection of the second portion on the substrate; a light emitting device, at least partially located within the isolation opening; an encapsulation portion, located on a side of the light-emitting device away from the substrate; as well as The first reinforcement portion is located on the outer side wall of the isolation structure, and the first reinforcement portion and the packaging portion are made of the same material.

14. The display panel according to claim 13, wherein: The light emitting device includes a light emitting portion; the display panel further includes a second reinforcing portion, the second reinforcing portion is located on a side of the first reinforcing portion away from the isolation structure, and the second reinforcing portion and the light emitting portion are made of the same material; Preferably, the orthographic projection of the first reinforcing portion on the substrate and the orthographic projection of the second reinforcing portion on the substrate are located within the orthographic projection range of the second portion on the substrate; Preferably, the first reinforcing portion covers a portion of the surface of the second portion facing the substrate, a side wall of the first portion, and a portion of the surface of the substrate.

15. A method for preparing a display panel, characterized in that: include: forming a dam and a first electrode on a substrate; sequentially preparing a first isolation material layer and a second isolation material layer on a side of the dam facing away from the substrate; Performing patterning on the second isolation material layer to form a plurality of first through holes and a plurality of first annular holes, wherein the first annular holes surround the through holes, and portions of the first isolation material layer exposed by the first through holes and the first annular holes are partially removed, so that the first isolation material layer forms side grooves below the through holes and the first annular holes; Performing patterning on the first isolation material layer to form a plurality of second through holes, wherein the second through holes are connected to the first through holes and constitute isolation openings; A light-emitting portion and a second electrode are prepared in the isolation opening, and the stacked first electrode, the light-emitting portion and the second electrode constitute a first light-emitting device.

16. The preparation method according to claim 15, characterized in that The first isolation material layer is patterned to form a plurality of second through holes and a plurality of second annular holes. The second annular holes are connected to the first annular holes to form an annular hole. The remaining first isolation material layer and second isolation material layer constitute an isolation structure and at least one protective portion. The isolation structure encloses the isolation opening, and the protective portion surrounds the isolation structure.

17. The preparation method according to claim 16, characterized in that Also includes: preparing a packaging material layer on a side of the first light-emitting device facing away from the substrate; Performing patterning on the packaging material layer to obtain a plurality of packaging parts, wherein the packaging part on the side of the first light-emitting device facing away from the substrate extends to the second isolation material layer covering the periphery of the annular hole; Preferably, preparing the light-emitting portion in the isolation opening includes: preparing a light-emitting functional material layer on a side of the second isolation material layer facing away from the substrate; The light-emitting functional material layer is patterned to obtain the light-emitting portion and the redundant light-emitting portion, and the redundant light-emitting portion is located in the annular hole.

18. A display device, characterized in that: A display panel comprising any one of claims 1-14, or a display panel obtained by executing any one of the preparation methods of claims 15-17.

Images