Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel and a preparation method thereof and a display device.The display panel comprises a substrate and an isolation structure, the isolation structure is arranged on one side of the substrate, multiple isolation openings used for containing light-emitting units are defined by the isolation structure, the isolation structure comprises a supporting part and a crown part, and the supporting part is arranged between the substrate and the crown part; the orthographic projection of one end, close to the crown part, of the supporting part on the substrate is located in the orthographic projection of the crown part on the substrate; wherein the material of the crown part comprises an inorganic material. According to the display panel provided by the invention, the material of the crown part of the isolation structure comprises the inorganic material, so that the crown part can be combined with the first packaging layer made of the inorganic material, the interface bonding force between the crown part and the first packaging layer is improved, and liquid medicine is prevented from entering from an interface between the crown part and the first packaging layer during subsequent dry etching and wet etching, so that the liquid medicine is prevented from entering the first packaging layer. Therefore, the problem of pixel dark spots is effectively solved, and the packaging effect and the display performance of the display panel are improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display panel that can improve packaging effect and display performance.

[0005] Based on the above purpose, the present application provides a display panel, which includes:

[0006] substrate;

[0007] an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprising a support portion and a crown portion, the support portion being disposed between the substrate and the crown portion, and an orthographic projection of an end of the support portion close to the crown portion on the substrate being located within an orthographic projection of the crown portion on the substrate;

[0008] Wherein, the material of the crown includes inorganic material.

[0009] In one embodiment, the support portion includes a first support portion and a protective layer, and the protective layer is disposed between the first support portion and the crown portion;

[0010] Preferably, the material of the protective layer includes molybdenum;

[0011] Preferably, the material of the first supporting portion includes aluminum;

[0012] Preferably, the inorganic material includes one or more of silicon nitride, silicon oxide, and silicon oxynitride;

[0013] Preferably, the thickness of the crown is greater than 3000A.

[0014] In one embodiment, the support portion further includes a second support portion, the second support portion is disposed between the first support portion and the substrate, and the orthographic projection of the first support portion on the substrate is located within the orthographic projection of the second support portion on the substrate;

[0015] Preferably, the material of the second supporting portion includes molybdenum.

[0016] In one embodiment, the light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate, the light-emitting functional layer and the second electrode are located in the isolation opening, and the second electrode is electrically overlapped with the support portion.

[0017] In one embodiment, the display panel further includes a first encapsulation layer, the first encapsulation layer covers the second electrode, the side wall of the support portion, and the side wall of the crown portion; wherein the first encapsulation layer includes an inorganic material;

[0018] Preferably, the crown portion includes an extension portion, the orthographic projection of the extension portion on the substrate does not overlap with the orthographic projection of one end of the support portion close to the crown portion on the substrate, and the first encapsulation layer covers a side of the extension portion close to the substrate;

[0019] Preferably, the first encapsulation layer is continuously provided on a side of the second electrode away from the substrate, a side wall of the support portion, a side of the extension portion close to the substrate, and a side wall of the extension portion.

[0020] In one embodiment, the display panel further includes a pixel defining layer, which is located between the isolation structure and the substrate, and the pixel defining layer defines a plurality of pixel openings corresponding to the isolation openings respectively, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate, and the pixel defining layer covers the gaps between adjacent first electrodes and the edges of the first electrodes, so that the pixel openings expose the first electrodes.

[0021] In one embodiment, the isolation openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings respectively define the light-emitting units with different colors of emitted light.

[0022] Based on the same inventive concept, the present application also discloses a method for preparing a display panel, which comprises:

[0023] forming a first supporting layer on one side of the substrate;

[0024] forming an isolation layer on a side of the first supporting layer away from the substrate; wherein the isolation layer comprises an inorganic material;

[0025] Performing a first patterning on the first supporting layer and the isolation layer, wherein the isolation layer after the first patterning forms a crown;

[0026] The first supporting layer after the first patterning is patterned for the second time to form a supporting portion; wherein the orthographic projection of one end of the supporting portion close to the crown portion on the substrate is located within the orthographic projection of the crown portion on the substrate, and the supporting portion and the crown portion form an isolation structure, and the isolation structure encloses a plurality of isolation openings for accommodating the light-emitting units.

[0027] In one embodiment, forming a first supporting layer on one side of the substrate includes:

[0028] The first sub-supporting layer, the second sub-supporting layer and the third sub-supporting layer are sequentially formed on one side of the substrate; the first sub-supporting layer, the second sub-supporting layer and the third sub-supporting layer form the first supporting layer;

[0029] The first sub-support layer after the second patterning forms a second supporting portion, the second sub-support layer after the second patterning forms a first supporting portion, the third sub-support layer after the second patterning forms a protective layer, and the second sub-support layer, the first sub-support layer and the protective layer form the supporting portion;

[0030] Preferably, the first patterning of the first supporting layer and the isolation layer comprises:

[0031] Performing a first patterning on the first supporting layer and the isolation layer by dry etching;

[0032] Preferably, the second patterning of the first supporting layer after the first patterning to form a supporting portion comprises:

[0033] The first supporting layer after the first patterning is patterned for the second time by means of wet etching to form a supporting portion.

[0034] Preferably, the first supporting layer after the first patterning is patterned for the second time to form a supporting portion, and then further comprises:

[0035] sequentially forming a light-emitting functional layer, a second electrode and a first encapsulation layer in the isolation opening and on a side of the isolation structure away from the substrate;

[0036] Patterning the first encapsulation layer;

[0037] Patterning the light-emitting functional layer and the second electrode;

[0038] Preferably, the first encapsulation layer is patterned by dry etching;

[0039] Preferably, the light-emitting functional layer and the second electrode are patterned by wet etching.

[0040] Based on the same inventive concept, the present application also discloses a display device, which includes the above-mentioned display panel.

[0041] Compared with the prior art, the display panel provided by the present application has an isolation structure in which the crown material includes an inorganic material, which is beneficial for the combination of the crown and the first packaging layer which is also an inorganic material, thereby improving the interface bonding strength between the crown and the first packaging layer, and preventing the liquid from entering from the interface between the crown and the first packaging layer during subsequent dry etching and wet etching, causing corrosion of the support part and erosion of the light-emitting unit, thereby effectively improving the pixel dark spot problem and improving the packaging effect and display performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a schematic diagram of a related display panel;

[0044] Figure 2 is a schematic diagram of a hierarchical structure of a related display panel;

[0045] Figure 3 A schematic diagram of the layer structure of a display panel provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of the layer structure of a display panel provided in another embodiment of the present application;

[0047] Figure 5 A schematic diagram of the layer structure of a display panel provided in another embodiment of the present application;

[0048] Figure 6 for Figure 5 Structural schematic diagram of the isolation structure;

[0049] Figure 7 A schematic diagram of the layer structure of a display panel provided in another embodiment of the present application;

[0050] Figure 8 for Figure 7 Structural schematic diagram of the isolation structure;

[0051] Fig. 9 A flow chart of a method for preparing a display panel provided in another embodiment of the present application;

[0052] Figure 10a-10g A schematic diagram of a method for preparing a display panel according to another embodiment of the present application.

[0053] Marking Description:

[0054] 100. Display panel;

[0055] 1. Substrate;

[0056] 2. Isolation structure; 21. Isolation opening; 22. Support portion; 23. Crown portion; 231. Extension portion; 24. First support portion; 25. Protective layer; 26. Second support portion;

[0057] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting functional layer; 33. Second electrode;

[0058] 4. pixel definition layer; 41. pixel opening;

[0059] 5. The first encapsulation layer;

[0060] 6. first supporting layer; 61. first sub-supporting layer; 62. second sub-supporting layer; 63. third sub-supporting layer;

[0061] 7. Isolation layer;

[0062] 8. Photoresist. DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0064] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0065] Patent applications CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN11799 8900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A record relevant technical solutions of the isolation structure 2, and their contents are incorporated into this application by reference for reference.

[0066] Reference Figure 1-2 FIG. 1 is a schematic diagram of a structure of a related display panel, which includes a substrate 1 and an isolation structure 2 disposed on one side of the substrate 1. The isolation structure 2 encloses an isolation opening 21 for accommodating a light-emitting unit 3. Adjacent light-emitting units 3 are separated by the isolation structure 2. The cathode in the light-emitting unit 3 is electrically connected to the isolation structure 2. The isolation structure 2 generally includes a support portion 22 and a crown portion 23.

[0067] Among them, an isolation structure 2 is set at the gap between the light-emitting units 3 to separate the functional film layers of adjacent light-emitting units 3. In this way, in the evaporation process of multiple functional film layers, it is only necessary to perform evaporation on the entire surface of the display panel, without the need to use a mask plate to evaporate the area where the light-emitting unit is located to form a functional film layer. Therefore, the process of evaporation using the isolation structure 2 does not need to consider the positioning accuracy during evaporation, so that the gap between the light-emitting units 3 can be designed to be smaller in size to increase the pixel density.

[0068] The interface bonding force between the crown 23 and the first encapsulation layer 5 is relatively weak, and the interface is invaded by subsequent multiple dry etching and wet etching solutions, which will cause the edge of the crown 23 to separate from the first encapsulation layer 5 and cause edge warping. Figure 2 Therefore, in the subsequent manufacturing process, the drug solution will enter from the gap between the crown 23 and the first packaging layer 5, causing the isolation structure 2 to corrode and erode the light-emitting unit 3, resulting in dark spots in the pixels.

[0069] Based on this, the present application provides a display panel solution, as detailed in the following embodiments.

[0070] Reference Figure 3-4 As shown, an embodiment of the present application discloses a display panel 100, which includes a substrate 1 and an isolation structure 2. The isolation structure 2 is arranged on one side of the substrate 1. The isolation structure 2 encloses a plurality of isolation openings 21 for accommodating the light-emitting units 3. The isolation structure 2 includes a support portion 22 and a crown portion 23. The support portion 22 is arranged between the substrate 1 and the crown portion 23. The orthographic projection of one end of the support portion 22 close to the crown portion 23 on the substrate 1 is located within the orthographic projection of the crown portion 23 on the substrate 1; wherein the material of the crown portion 23 includes an inorganic material.

[0071] After long-term research, the inventors found that in the isolation structure 2 of the current display panel, the crown 23 is usually metal (such as titanium), and the first packaging layer 5 is usually inorganic material. The interface bonding force between the inorganic material and the metal is weak, which will cause the edge of the crown 23 to separate from the first packaging layer 5 and cause edge warping.

[0072] The display panel 100 provided in this embodiment has a crown 23 of an isolation structure 2 made of an inorganic material, which is beneficial for the crown 23 to be combined with the first encapsulation layer 5 which is also an inorganic material, thereby improving the interface bonding force between the crown 23 and the first encapsulation layer 5, and preventing the liquid from entering from the interface between the crown 23 and the first encapsulation layer 5 during subsequent dry etching and wet etching, thereby corroding the support portion 22 and eroding the light-emitting unit 3, thereby effectively improving the pixel dark spot problem and improving the encapsulation effect and display performance of the display panel 100.

[0073] Among them, the orthographic projection of one end of the support portion 22 close to the crown portion 23 on the substrate 1 is located within the orthographic projection of the crown portion 23 on the substrate 1. In this way, at least the portion of the isolation structure 2 away from the substrate 1 is set to a shape that is wide at the top and narrow at the bottom, so that the isolation structure 2 can block the light-emitting functional layer of the adjacent light-emitting unit 3 to reduce the current crosstalk problem of the adjacent light-emitting units 3.

[0074] In one embodiment, the isolation opening 21 includes a first type of opening, a second type of opening, and a third type of opening, and the first type of opening, the second type of opening, and the third type of opening respectively define light-emitting units 3 with different colors of emitted light, thereby improving the richness of the display of the display panel 100. Exemplarily, the light-emitting units 3 of different colors include light-emitting units R, light-emitting units B, and light-emitting units G. Further, the first type of opening, the second type of opening, and the third type of opening can be set as needed, and their shapes and sizes may be different, and are not specifically limited.

[0075] Please continue to refer to Figure 3 As shown, in one embodiment, the light-emitting unit 3 includes a first electrode 31, a light-emitting functional layer 32, and a second electrode 33 sequentially stacked on the substrate 1, the light-emitting functional layer 32 and the second electrode 33 are located in the isolation opening 21, and the second electrode 33 overlaps the support portion 22. In a specific embodiment, the first electrode 31 is an anode, and the second electrode 33 is a cathode. Different voltages are configured on the first electrode 31 and the second electrode 33 to form a voltage difference between the first electrode 31 and the second electrode 33, so as to drive the light-emitting functional layer 32 to emit light.

[0076] Please continue to refer to Figure 4 As shown, in one embodiment, the display panel 100 further includes a first encapsulation layer 5, which covers the second electrode 33, the side wall of the support portion 22 and the side wall of the crown portion 23; wherein the first encapsulation layer 5 includes an inorganic material. The first encapsulation layer 5 of the inorganic material and the crown portion 23 of the inorganic material have a strong interface bonding force, which can effectively prevent the edge of the crown portion 23 from being separated from the first encapsulation layer 5 and causing edge warping, thereby preventing the drug solution from entering from the interface between the crown portion 23 and the first encapsulation layer 5 during subsequent dry etching and wet etching, causing the support portion 22 to corrode and erode the light-emitting unit 3, effectively improving the pixel dark spot problem, and improving the encapsulation effect and display performance of the display panel 100.

[0077] Furthermore, the first encapsulation layer 5 is an inorganic layer, and the inorganic layer has high density to isolate water and oxygen. In a specific embodiment, the display panel 100 also includes a second encapsulation layer and a third encapsulation layer, the second encapsulation layer is located on the side of the first encapsulation layer 5 away from the substrate 1, and the third encapsulation layer is located on the side of the second encapsulation layer away from the substrate 1. The second encapsulation layer is an organic layer, so it has a large thickness to flatten the surface of the display panel, and the third encapsulation layer is an inorganic layer, realizing inorganic-organic-inorganic three-layer encapsulation.

[0078] Please continue to refer to Figure 4As shown, in one embodiment, the crown 23 includes an extension portion 231, and the orthographic projection of the extension portion 231 on the substrate 1 does not overlap with the orthographic projection of one end of the support portion 22 close to the crown 23 on the substrate 1, and the first encapsulation layer 5 covers the side of the extension portion 231 close to the substrate 1, that is, the bottom area of ​​the crown 23 that is not in contact with the support portion 22 is covered by the first encapsulation layer 5 to enhance the interface bonding force between the crown 23 and the first encapsulation layer 5, thereby enhancing the encapsulation effect.

[0079] Preferably, the first packaging layer 5 is continuously arranged on the side of the second electrode 33 away from the substrate 1, the side wall of the support portion 22, the side of the extension portion 231 close to the substrate 1 and the side wall of the extension portion 231, which is beneficial to increase the packaging area, ensure packaging reliability and improve the packaging effect.

[0080] Please continue to refer to Figure 3 As shown, in one embodiment, the display panel 100 also includes a pixel defining layer 4, which is located between the isolation structure 2 and the substrate 1, and the pixel defining layer 4 is defined by a plurality of pixel openings 41 corresponding to the isolation openings 21 respectively, and the orthographic projection of the pixel opening 41 on the substrate 1 is located within the orthographic projection of the corresponding isolation opening 21 on the substrate 1, and the pixel defining layer 4 covers the gaps between adjacent first electrodes 31 and the edges of the first electrodes 31, so that the pixel openings 41 expose the first electrodes 31.

[0081] The pixel defining layer 4 determines the shape and position of the light emitting unit 3 and isolates the first electrode 31 from the isolation structure 2. Thus, the first electrode 31 can have a larger design area without contacting the isolation structure 2, so that the light emitting unit 3 has a larger effective light emitting area.

[0082] Reference Figure 5 and 6 As shown, in one embodiment, the support portion 22 includes a first support portion 24 and a protective layer 25, and the protective layer 25 is disposed between the first support portion 24 and the crown portion 23; wherein the protective layer 25 is used to protect the first support portion 24 from generating bulges during film formation. Preferably, the material of the protective layer 25 includes molybdenum, etc.; wherein the material of the protective layer 25 is molybdenum, so that lateral wet etching can be performed on it.

[0083] Preferably, the material of the first support portion 24 includes metals such as aluminum, which is convenient for preparing a thicker film structure.

[0084] Preferably, the inorganic material of the crown 23 includes one or more of silicon nitride, silicon oxide, and silicon oxynitride. In other embodiments, the crown 23 may be made of other inorganic materials, which are not specifically limited.

[0085] Preferably, the thickness of the crown 23 is greater than 3000A, that is, 300nm, and can be 3000A, 4000A, 5000A, etc. A thicker crown 23 can prevent over-etching of the crown 23 during subsequent dry etching of the first encapsulation layer 5 .

[0086] Reference Figure 7 and 8 As shown, in one embodiment, the support portion 22 further includes a second support portion 26, which is disposed between the first support portion 24 and the substrate 1, and the orthographic projection of the first support portion 24 on the substrate 1 is located within the orthographic projection of the second support portion 26 on the substrate 1. The second support portion 26 is conducive to improving the electrical connection effect between the support portion 22 and the second electrode 33. Preferably, the material of the second support portion 26 includes molybdenum, etc., which has good conductivity and stability.

[0087] Reference Fig. 9 As shown, another embodiment of the present application discloses a method for preparing a display panel, which includes the following steps:

[0088] Step S10 , forming a first supporting layer 6 on one side of the substrate 1 .

[0089] Specifically, refer to Fig.10a , step S10, forming a first supporting layer 6 on one side of the substrate 1, comprising:

[0090] A first sub-supporting layer 61 , a second sub-supporting layer 62 and a third sub-supporting layer 63 are sequentially formed on one side of the substrate 1 , wherein the first sub-supporting layer 61 , the second sub-supporting layer 62 and the third sub-supporting layer 63 form a first supporting layer 6 .

[0091] Step S20, forming an isolation layer 7 on the side of the first support layer 6 away from the substrate 1; Fig.10a , wherein the isolation layer 7 comprises an inorganic material.

[0092] Step S30 , performing a first patterning on the first support layer 6 and the isolation layer 7 , and forming a crown 23 on the isolation layer 7 after the first patterning.

[0093] Preferably, the first support layer 6 and the isolation layer 7 are patterned for the first time by dry etching. Specifically, a photoresist 8 is first formed in the target area on the isolation layer 7. Fig.10c Then, the first support layer 6 and the isolation layer 7 in the area where the photoresist 8 is not formed are removed by dry etching, referring to Fig.10d .

[0094] Step S40, patterning the first supporting layer 6 after the first patterning for a second time to form a supporting portion 22, wherein the orthographic projection of one end of the supporting portion 22 close to the crown 23 on the substrate 1 is located within the orthographic projection of the crown 23 on the substrate 1, and the supporting portion 22 and the crown 23 form an isolation structure 2, and the isolation structure 2 encloses a plurality of isolation openings 21 for accommodating the light-emitting units 3.

[0095] Preferably, the first supporting layer 6 patterned for the second time is patterned by wet etching.

[0096] Specifically, refer to Fig.10e , wherein the first sub-support layer 61 forms the second support portion 26 after the second patterning, the second sub-support layer 62 forms the first support portion 24 after the second patterning, and the third sub-support layer 63 forms the protective layer 25 after the second patterning. The first support portion 24, the second support portion 26 and the protective layer 25 constitute the support portion 22, and the support portion 22 and the crown portion 23 constitute an isolation structure. In this embodiment, refer to Fig.10e The photoresist 8 is removed after the second patterning, and the display panel 100 prepared is shown in FIG. Figure 10g In another embodiment, the photoresist 8 is removed before the second patterning, referring to Fig.10f .

[0097] Preferably, step S40, performing a second patterning on the first supporting layer 6 after the first patterning to form the supporting portion 22, and then further comprising the following steps:

[0098] A light-emitting functional layer 32, a second electrode 33 and a first encapsulation layer 5 are sequentially formed in the isolation opening 21 and on the side of the isolation structure 2 away from the substrate 1; Figure 4 shown.

[0099] The first encapsulation layer 5 is patterned; preferably, the first encapsulation layer 5 is patterned by dry etching.

[0100] The light-emitting functional layer 32 and the second electrode 33 are patterned; preferably, the light-emitting functional layer 32 and the second electrode 33 are patterned by wet etching.

[0101] In other embodiments, a pixel defining layer 4 is further prepared between the substrate 1 and the support portion 22, and a first electrode 31 is further prepared between the pixel defining layer 4 and the substrate 1. The pixel defining layer 4 defines a plurality of pixel openings 41 corresponding to the isolation openings 21, respectively, and the orthographic projection of the pixel opening 41 on the substrate 1 is located within the orthographic projection of the corresponding isolation opening 21 on the substrate 1, and the pixel defining layer 4 covers the gaps between adjacent first electrodes 31 and the edges of the first electrodes 31, so that the pixel openings 41 expose the first electrodes 31. The first electrode 31, the light-emitting functional layer 32, and the second electrode 33 are stacked in sequence to form a light-emitting unit 3.

[0102] The display panel 100 prepared by the display panel preparation method provided in the present embodiment has a crown 23 of the isolation structure 2 made of an inorganic material, which is beneficial for the crown 23 to be combined with the first encapsulation layer 5 which is also an inorganic material, thereby improving the interface bonding force between the crown 23 and the first encapsulation layer 5, and preventing the liquid from entering from the interface between the crown 23 and the first encapsulation layer 5 during subsequent dry etching and wet etching, thereby corroding the support portion 22 and eroding the light-emitting unit 3, thereby effectively improving the pixel dark spot problem and improving the encapsulation effect and display performance of the display panel 100.

[0103] The specific structure and materials of the display panel 100 prepared in the method for preparing the display panel of this embodiment refer to the above-mentioned display panel embodiment, and will not be described in detail here.

[0104] Another embodiment of the present application discloses a display device, which includes the display panel 100 in the above embodiment. The display device can be on a smart device (such as a mobile phone, VR device, computer, television, car display, etc.).

[0105] In the display device in this embodiment, the material of the crown 23 of the isolation structure 2 in the display panel 100 includes an inorganic material, which is beneficial for the crown 23 to be combined with the first encapsulation layer 5 which is also an inorganic material, thereby improving the interface bonding force between the crown 23 and the first encapsulation layer 5, and preventing the drug solution from entering from the interface between the crown 23 and the first encapsulation layer 5 during subsequent dry etching and wet etching, causing corrosion of the support portion 22 and erosion of the light-emitting unit 3, thereby effectively improving the pixel dark spot problem and improving the display performance of the display device.

[0106] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0107] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0108] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprising a support portion and a crown portion, the support portion being disposed between the substrate and the crown portion, and an orthographic projection of an end of the support portion close to the crown portion on the substrate being located within an orthographic projection of the crown portion on the substrate; Wherein, the material of the crown includes inorganic material.

2. The display panel according to claim 1, wherein: The support portion includes a first support portion and a protective layer, wherein the protective layer is disposed between the first support portion and the crown portion; Preferably, the material of the protective layer includes molybdenum; Preferably, the material of the first supporting portion includes aluminum; Preferably, the inorganic material includes one or more of silicon nitride, silicon oxide, and silicon oxynitride; Preferably, the thickness of the crown is greater than 3000A.

3. The display panel according to claim 2, wherein: The support portion further includes a second support portion, the second support portion is disposed between the first support portion and the substrate, and the orthographic projection of the first support portion on the substrate is located within the orthographic projection of the second support portion on the substrate; Preferably, the material of the second supporting portion includes molybdenum.

4. The display panel according to claim 1, wherein: The light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate, the light-emitting functional layer and the second electrode are located in the isolation opening, and the second electrode is electrically overlapped with the support portion.

5. The display panel according to claim 4, wherein: The display panel further includes a first encapsulation layer, the first encapsulation layer covers the second electrode, the side wall of the support portion, and the side wall of the crown portion; wherein the first encapsulation layer includes an inorganic material; Preferably, the crown portion includes an extension portion, the orthographic projection of the extension portion on the substrate does not overlap with the orthographic projection of one end of the support portion close to the crown portion on the substrate, and the first encapsulation layer covers a side of the extension portion close to the substrate; Preferably, the first encapsulation layer is continuously provided on a side of the second electrode away from the substrate, a side wall of the support portion, a side of the extension portion close to the substrate, and a side wall of the extension portion.

6. The display panel according to claim 4, wherein: The display panel also includes a pixel defining layer, which is located between the isolation structure and the substrate. The pixel defining layer defines a plurality of pixel openings corresponding to the isolation openings respectively, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate, and the pixel defining layer covers the gaps between adjacent first electrodes and the edges of the first electrodes so that the pixel openings expose the first electrodes.

7. The display panel according to claim 1, wherein: The isolation openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings respectively define the light-emitting units with different colors of emitted light.

8. A method for preparing a display panel, characterized in that: include: forming a first supporting layer on one side of the substrate; forming an isolation layer on a side of the first supporting layer away from the substrate; wherein the isolation layer comprises an inorganic material; Performing a first patterning on the first supporting layer and the isolation layer, wherein the isolation layer after the first patterning forms a crown; The first supporting layer after the first patterning is patterned for the second time to form a supporting portion; wherein the orthographic projection of one end of the supporting portion close to the crown portion on the substrate is located within the orthographic projection of the crown portion on the substrate, and the supporting portion and the crown portion form an isolation structure, and the isolation structure encloses a plurality of isolation openings for accommodating the light-emitting units.

9. The method for preparing a display panel according to claim 8, wherein: The step of forming a first supporting layer on one side of the substrate comprises: A first sub-support layer, a second sub-support layer and a third sub-support layer are sequentially formed on one side of the substrate; the first sub-support layer, the second sub-support layer and the third sub-support layer form the first supporting layer; The first sub-support layer after the second patterning forms a second supporting portion, the second sub-support layer after the second patterning forms a first supporting portion, the third sub-support layer after the second patterning forms a protective layer, and the second sub-support layer, the first sub-support layer and the protective layer form the supporting portion; Preferably, the first patterning of the first supporting layer and the isolation layer comprises: Performing a first patterning on the first supporting layer and the isolation layer by dry etching; Preferably, the second patterning of the first supporting layer after the first patterning to form a supporting portion comprises: Performing a second patterning on the first supporting layer after the first patterning by wet etching to form a supporting portion; Preferably, the first supporting layer after the first patterning is patterned for the second time to form a supporting portion, and then further comprises: sequentially forming a light-emitting functional layer, a second electrode and a first encapsulation layer in the isolation opening and on a side of the isolation structure away from the substrate; Patterning the first encapsulation layer; Patterning the light-emitting functional layer and the second electrode; Preferably, the first encapsulation layer is patterned by dry etching; Preferably, the light-emitting functional layer and the second electrode are patterned by wet etching.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 7.

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