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 located at one side of the substrate, the isolation structure defines a plurality of isolation openings for accommodating at least part of light emitting units, and the isolation structure comprises a supporting part and a crown part located at one side, far away from the substrate, of the supporting part; the orthographic projection of the supporting part on the substrate is positioned in the orthographic projection of the crown part on the substrate; the supporting part comprises a first sub-supporting part, a middle layer and a second sub-supporting part which are sequentially arranged in a stacked mode in the direction away from the substrate, and the orthographic projection of the side, close to the middle layer, of the first sub-supporting part and the orthographic projection of the side, close to the middle layer, of the second sub-supporting part on the substrate are located within the orthographic projection of the middle layer on the substrate. The first packaging layer and the supporting part are combined more tightly, the packaging effect can be improved, damage of failure factors to the light-emitting material is relieved, product defects are reduced, and the display performance is 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] OLED (Organic Light-Emitting Diode) is an active light-emitting unit with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, display screens based on AMOLED (Active-matrix organic light-emitting diode) have been commercialized in the fields of smartphones, watches, and laptops.

[0003] However, existing display screens are prone to display defects. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display panel and a preparation method thereof, as well as a display device that are helpful in improving display defects and enhancing display performance.

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

[0006] substrate;

[0007] an isolation structure, the isolation structure being located at one side of the substrate, the isolation structure enclosing a plurality of isolation openings for accommodating at least part of the light-emitting units, the isolation structure comprising a support portion and a crown portion located at a side of the support portion away from the substrate, the orthographic projection of the support portion on the substrate being located within the orthographic projection of the crown portion on the substrate;

[0008] In which, the supporting part includes a first sub-supporting part, an intermediate layer, and a second sub-supporting part which are stacked in sequence in a direction away from the substrate, and an area of ​​an orthographic projection of the intermediate layer on the substrate is larger than an area of ​​an orthographic projection of a side of the first sub-supporting part close to the intermediate layer and a side of the second sub-supporting part close to the intermediate layer on the substrate; and the orthographic projections of a side of the first sub-supporting part close to the intermediate layer and a side of the second sub-supporting part close to the intermediate layer on the substrate are located within the orthographic projection of the intermediate layer on the substrate.

[0009] In one embodiment, the display panel further includes a first encapsulation layer, the support portion includes a first side wall surrounding the isolation opening; the first encapsulation layer is disposed on a side of the isolation structure and the light-emitting unit away from the substrate, and the first encapsulation layer covers a surface of the light-emitting unit away from the substrate and at least a portion of the first side wall, and extends to a side of the isolation structure away from the substrate; the first encapsulation layer is in contact with the intermediate layer;

[0010] Preferably, the orthographic projection of the end of the first side wall close to the crown on the base plate is located within the orthographic projection of the end of the first side wall close to the base plate on the base plate;

[0011] Preferably, the orthographic projection of the second sub-support portion on the substrate is located within the orthographic projection of the first sub-support portion on the substrate.

[0012] In one embodiment, the intermediate layer includes a first portion and a second portion, and an orthographic projection of the first portion on the substrate at least partially surrounds an orthographic projection of the second portion on the substrate;

[0013] The orthographic projection of the first portion on the substrate at least partially surrounds the orthographic projections of a side of the first sub-support portion close to the middle layer and a side of the second sub-support portion close to the middle layer on the substrate;

[0014] Preferably, the corrosion resistance of the material of the intermediate layer is greater than the corrosion resistance of the material of the first sub-support part and the second sub-support part;

[0015] Preferably, the material of the intermediate layer includes molybdenum or indium tin oxide;

[0016] Preferably, the intermediate layer comprises a multi-layer structure;

[0017] Preferably, the first sub-support portion and the second sub-support portion are made of the same material;

[0018] Preferably, the material of the first sub-support portion and the second sub-support portion includes aluminum.

[0019] In one embodiment, the first portion includes a first surface and a second surface that are oppositely arranged, the first surface is located between the substrate and the second surface, the intermediate layer also includes a first side surface connecting the first surface and the second surface, and the first packaging layer is in contact with the first surface, the first side surface and the second surface.

[0020] In one embodiment, the first side wall includes a first sub-side surface located at the first sub-support portion and a second sub-side surface located at the second sub-support portion, and the first encapsulation layer contacts at least a portion of the first sub-side surface and contacts at least a portion of the second sub-side surface;

[0021] Preferably, the first sub-side surface and the second sub-side surface are arranged coplanarly;

[0022] Preferably, the crown portion includes a third surface and a fourth surface that are arranged opposite to each other, the third surface is located between the substrate and the fourth surface, the crown portion also includes a second side surface connecting the third surface and the fourth surface, and the first encapsulation layer is in contact with at least a portion of the third surface and is in contact with the second side surface;

[0023] Preferably, the material of the crown comprises titanium.

[0024] In one embodiment, the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, the light-emitting layer and the second electrode are located in the isolation opening, the support portion includes a conductive structure, and the second electrode includes a lap portion electrically connected to the first sub-support portion;

[0025] In a direction perpendicular to the substrate, there is a gap between the overlapping portion and the intermediate layer;

[0026] Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

[0027] In one embodiment, the isolation structure further includes an auxiliary support portion, which is located on a side of the support portion away from the crown portion and is a conductive structure, and the second electrode is electrically connected to a surface of the auxiliary support portion away from the substrate;

[0028] Preferably, the orthographic projection of the auxiliary support portion on the base plate is located within the orthographic projection of the crown portion on the base plate;

[0029] Preferably, the orthographic projection of the side of the support portion close to the substrate on the substrate is located within the orthographic projection of the auxiliary support portion on the substrate;

[0030] Preferably, the material of the auxiliary supporting part includes molybdenum.

[0031] In one embodiment, the display panel further includes a pixel defining layer, the pixel defining layer is located between the isolation structure and the substrate, and defines a plurality of pixel openings correspondingly connected to the isolation openings, respectively, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate;

[0032] Preferably, the pixel defining layer at least covers an edge of the first electrode;

[0033] Preferably, the pixel defining layer covers the gap between adjacent first electrodes;

[0034] Preferably, the pixel defining layer comprises an inorganic layer.

[0035] Based on the same inventive concept, the present application also provides a display panel, including:

[0036] substrate;

[0037] an isolation structure, the isolation structure being located at 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 located at a side of the support portion away from the substrate, the orthographic projection of the support portion on the substrate being located within the orthographic projection of the crown portion on the substrate;

[0038] Wherein, the supporting portion comprises a first side wall for enclosing the isolation opening, and the first side wall is provided with a protruding structure.

[0039] In one embodiment, the display panel further includes a first encapsulation layer, the first encapsulation layer covers a surface of the light-emitting unit away from the substrate, covers at least a portion of the first side wall, and extends to a side of the isolation structure away from the substrate; at least a portion of the first encapsulation layer is bonded to a surface of the protruding structure;

[0040] Preferably, the raised structure includes a first surface and a second surface that are oppositely arranged, the first surface is located between the substrate and the second surface, the raised structure also includes a first side surface connecting the first surface and the second surface, and the first encapsulation layer is in contact with the first surface, the first side surface and the second surface.

[0041] In one embodiment, the support portion includes a first sub-support portion, an intermediate layer, and a second sub-support portion stacked in sequence in a direction away from the substrate, the first side wall includes a first sub-side surface located at the first sub-support portion and a second sub-side surface located at the second sub-support portion, and the intermediate layer protrudes from the first sub-side surface and the second sub-side surface in a direction parallel to the substrate and extending into the isolation opening to form the protruding structure;

[0042] Preferably, the corrosion resistance of the material of the intermediate layer is greater than the corrosion resistance of the material of the first sub-support part and the second sub-support part;

[0043] Preferably, the material of the intermediate layer includes molybdenum or indium tin oxide;

[0044] Preferably, the material of the first sub-support portion and the second sub-support portion includes aluminum.

[0045] In one embodiment, the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, the light-emitting layer and the second electrode are located in the isolation opening, the support portion includes a conductive structure, the second electrode overlaps the first side wall, and the overlapping position is located on a side of the protruding structure close to the substrate;

[0046] In a direction perpendicular to the substrate, there is a gap between the second electrode and the protruding structure;

[0047] Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

[0048] Based on the same inventive concept, the present application also provides a method for preparing a display panel, the method comprising:

[0049] A first sub-support layer, an intermediate layer, a second sub-support layer and a third support layer are sequentially stacked on a substrate to form an isolation structure; wherein the isolation structure comprises a support layer and a crown portion, the support layer comprises the first sub-support layer, the intermediate layer and the second sub-support layer, the crown portion comprises the third support layer, and the orthographic projection of the support layer on the substrate is located within the orthographic projection of the crown portion on the substrate;

[0050] The side walls of the first sub-support layer and the second sub-support layer are etched to form a first sub-support portion and a second sub-support portion; wherein the orthographic projections of a side of the first sub-support portion close to the middle layer and a side of the second sub-support portion close to the middle layer on the substrate are located within the orthographic projection of the middle layer on the substrate.

[0051] In one embodiment, after the step of etching the sidewalls of the first sub-support layer and the second sub-support layer to form the first sub-support portion and the second sub-support portion, the preparation method further comprises:

[0052] A light-emitting layer, a second electrode and a first packaging layer are sequentially stacked on the substrate and patterned to form a light-emitting unit and a corresponding packaging portion; wherein the second electrode overlaps the first sub-support portion, and the packaging portion covers the surface of the corresponding light-emitting unit away from the substrate, and also covers the side walls of the first sub-support portion, the intermediate layer and the second sub-support layer, and extends to the side of the crown away from the substrate.

[0053] Based on the same inventive concept, the present application also provides a display device, which includes the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] 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.

[0055] Figure 1 is a schematic diagram of a hierarchical structure of a related display panel;

[0056] Figure 2 A schematic diagram of a hierarchical structure of a display panel provided in an embodiment of the present application;

[0057] Figure 3 A schematic diagram of the structure of an isolation structure provided in one embodiment of the present application;

[0058] Figure 4 A schematic diagram of the structure of an intermediate layer provided in one embodiment of the present application;

[0059] Figure 5 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0060] Figure 6 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0061] Figure 7 A flow chart of a method for preparing a display panel provided in another embodiment of the present application;

[0062] Figure 8 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0063] Fig. 9 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0064] Fig.10A schematic diagram of the hierarchical structure in the display panel preparation process provided by another embodiment of the present application.

[0065] Marking description: 100, display panel;

[0066] 1. Substrate;

[0067] 2. Isolation structure; 20. Isolation opening; 21. Support portion; 211. First sub-support portion; 2111. First sub-side surface; 212. Intermediate layer; 2121. First portion; 2122. Second portion; 2123. First surface; 2124. First side surface; 2125. Second surface; 213. Second sub-support portion; 2131. Second sub-side surface; 215. First side wall; 22. Crown portion; 221. Third surface; 222. Second side surface; 223. Fourth surface; 23. Auxiliary support portion; 201. Gap; 210. Protruding structure;

[0068] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting layer; 33. Second electrode;

[0069] 41. a first encapsulation layer; 42. a second encapsulation layer; 43. a third encapsulation layer;

[0070] 5. Pixel definition layer; 50. Pixel opening. DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] The composition, preparation and other contents of the isolation structure mentioned below are described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, Further description is provided in CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A for reference.

[0074] Reference Figure 1 As shown, a related display panel includes a substrate 1 and an isolation structure 2 arranged on one side of the substrate 1. The isolation structure 2 encloses a plurality of isolation openings 20. The isolation openings 20 accommodate at least part of the light-emitting units 3, so that adjacent light-emitting units 3 are separated by the isolation structure 2. The light-emitting units 3 are covered with a first encapsulation layer 41. Among them, by arranging the isolation structure 2 at the gap between the light-emitting units 3, the functional film layers of adjacent light-emitting units 3 can be separated. The light-emitting units 3 generally include R, G, and B, which are used to emit red light, green light, and blue light, respectively. Therefore, the isolation openings 20 also include multiple types of openings for accommodating different light-emitting units 3.

[0075] In the process of forming the light-emitting unit, the whole surface is firstly evaporated to complete the deposition of the first color full set of OLED light-emitting layer and functional layer, and then the whole surface is encapsulated with thin film, and then the unnecessary parts on the substrate are selectively removed through processes such as gluing, exposure, development, etching, and peeling to complete the patterning of the first color light-emitting unit. Then the above process is repeated twice to complete the full-color patterning of the three primary colors of red, green, and blue (RGB).

[0076] The inventors have found through research that part of the side walls of the isolation structure 2 formed in the related technology are relatively smooth, and the bonding force between the isolation structure 2 and the first encapsulation layer 41 is poor. There is a transverse gap 201 between the isolation structure 2 and the first encapsulation layer 41, resulting in poor film encapsulation effect of the first encapsulation layer 41. In the subsequent process, related failure factors, such as water vapor, invade the film structure of the encapsulated light-emitting unit 3 from the gap 201, and then damage the light-emitting material, resulting in poor display of pixels that are half bright and half dark.

[0077] Based on this, the present application provides a display panel solution, as detailed in the following embodiments.

[0078] Reference Figure 2 , Figure 3 As shown, some embodiments of the present application provide a display panel 100, which includes a substrate 1 and an isolation structure 2, the isolation structure 2 is disposed on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 20, and the isolation openings 20 accommodate at least part of the film layer of the light-emitting unit 3. The isolation structure 2 includes a support portion 21 and a crown portion 22, and the crown portion 22 is located on a side of the support portion 21 away from the substrate 1. The orthographic projection of the support portion 21 on the substrate 1 is located within the orthographic projection of the crown portion 22 on the substrate 1.

[0079] The support portion 21 includes a first sub-support portion 211, an intermediate layer 212, and a second sub-support portion 213 which are sequentially stacked in a direction away from the substrate 1. The area of ​​the orthographic projection of the intermediate layer 212 on the substrate 1 is larger than the area of ​​the orthographic projection of the side of the first sub-support portion 211 close to the intermediate layer 212 and the side of the second sub-support portion 213 close to the intermediate layer 212 on the substrate 1. The orthographic projections of the side of the first sub-support portion 211 close to the intermediate layer 212 and the side of the second sub-support portion 213 close to the intermediate layer 212 on the substrate 1 are located within the orthographic projection of the intermediate layer 212 on the substrate 1. The side of the first sub-support portion 211 close to the intermediate layer 212 refers to the end face where the first sub-support portion 211 and the intermediate layer 212 are connected; the side of the second sub-support portion 213 close to the intermediate layer 212 refers to the end face where the second sub-support portion 213 and the intermediate layer 212 are connected.

[0080] Specifically, at least the portion of the isolation structure 2 away from the substrate 1 is configured to be wide at the top and narrow at the bottom, so that the isolation structure 2 can block the light-emitting layer of the adjacent light-emitting unit 3 to reduce the risk of current crosstalk between the adjacent light-emitting units 3. The support portion 21 adopts a multi-layer sandwich structure with an additional intermediate layer 212, and the intermediate layer 212 is relatively large, forming a convex structure protruding outward relative to the first sub-support portion 211 and the second sub-support portion 213.

[0081] In the display panel 100 provided in the embodiment of the present application, an intermediate layer 212 is provided on the support portion 21, and the intermediate layer 212 forms a protruding structure protruding on the side wall of the support portion 21. Then, during the film layer packaging process, the first packaging layer can cover the protruding structure located in the intermediate layer 212, and be more closely combined with the support portion 21, thereby improving the packaging effect, slowing down the failure factor from damaging the luminescent material, reducing product defects, and improving display performance.

[0082] Reference Figure 2As shown, in some embodiments, the display panel 100 also includes a first encapsulation layer 41, the support portion 21 includes a first side wall 215 for enclosing the isolation opening 20, the first encapsulation layer 41 is arranged on the side of the isolation structure 2 and the light-emitting unit 3 away from the substrate 1, the first encapsulation layer 41 covers the surface of the light-emitting unit 3 away from the substrate 1, and also covers at least a portion of the first side wall 215, and extends to the side of the isolation structure 2 away from the substrate 1.

[0083] Optionally, the orthographic projection of the end of the first side wall 215 close to the crown 22 on the substrate 1 is located within the orthographic projection of the end of the first side wall 215 close to the substrate 1 on the substrate 1 .

[0084] Optionally, the orthographic projection of the second sub-support portion 213 on the substrate 1 is located within the orthographic projection of the first sub-support portion 211 on the substrate 1 .

[0085] Among them, the first encapsulation layer 41 contacts the surface of the light-emitting unit 3 on the side away from the substrate 1, and also contacts a portion of the first side wall 215, and extends to the side of the isolation structure 2 away from the substrate 1. The first encapsulation layer 41 also contacts the middle layer 212, thereby forming a relatively tight encapsulation structure. The tight encapsulation of the first encapsulation layer 41 can enhance the barrier protection effect of the light-emitting unit 3. The first encapsulation layer 41 can effectively block water vapor and oxygen in the external environment from entering the light-emitting unit, thereby avoiding the performance degradation or failure of the light-emitting material due to moisture or oxidation, thereby ensuring the stability of the display panel 100.

[0086] Optionally, the display panel 100 further includes a second encapsulation layer 42 and a third encapsulation layer 43, wherein the second encapsulation layer 42 is located on a side of the first encapsulation layer 41 away from the substrate 1, and the third encapsulation layer 43 is located on a side of the second encapsulation layer 42 away from the first encapsulation layer 41. Specifically, the second encapsulation layer 42 covers the first encapsulation layer 41 and the isolation structure 2, and the third encapsulation layer 43 covers the second encapsulation layer 42. The first encapsulation layer 41 and the third encapsulation layer 43 are inorganic layers, which have high density to isolate water and oxygen, and the second encapsulation layer 42 is an organic layer, so it has a large thickness to flatten the surface of the display panel, thereby realizing inorganic-organic-inorganic three-layer encapsulation.

[0087] Reference Figure 3 , Figure 4As shown, in some embodiments, the middle layer 212 includes a first portion 2121 and a second portion 2122, and the orthographic projection of the first portion 2121 on the substrate 1 at least partially surrounds the orthographic projection of the second portion 2122 on the substrate 1. That is, the orthographic projection of the second portion 2122 on the substrate 1 is located within the orthographic projection of the first portion 2121 on the substrate 1, and there is no overlap. The orthographic projection of the first portion 2121 on the substrate 1 at least partially surrounds the orthographic projections of the first sub-support portion 211 on the side close to the middle layer 212 and the second sub-support portion 213 on the side close to the middle layer 212 on the substrate 1. In other words, the orthographic projection of the first portion 2121 on the substrate 1 is located outside the orthographic projections of the first sub-support portion 211 on the side close to the middle layer 212 and the second sub-support portion 213 on the side close to the middle layer 212 on the substrate 1. Among them, the first portion 2121 is a protruding structure of the middle layer 212 protruding outward relative to the first sub-support portion 211 and the second sub-support portion 213.

[0088] Optionally, the corrosion resistance of the material of the intermediate layer 212 is greater than the corrosion resistance of the materials of the first sub-support portion 211 and the second sub-support portion 213 .

[0089] Specifically, the middle layer 212 is made of alkali-resistant but not acid-resistant material. In the process of forming the isolation structure 2, the side wall of the support part 21 is treated with an alkaline solution. The first sub-support part 211 and the second sub-support part 213 are corroded backward by the lateral solution, and the middle layer material cannot be corroded and is retained, forming a "pagoda-shaped" structure.

[0090] Optionally, the material of the intermediate layer 212 includes molybdenum or indium tin oxide.

[0091] Optionally, the middle layer 212 includes a multi-layer structure. The multi-layer structure can increase the thickness of the middle layer 212 to increase the strength of the connection with the first packaging layer 41 and improve the packaging effect.

[0092] Optionally, the first sub-support portion 211 and the second sub-support portion 213 are made of the same material.

[0093] Optionally, the material of the first sub-support portion 211 and the second sub-support portion 213 includes aluminum. The corrosion resistance of molybdenum or indium tin oxide (for example, relative to alkaline liquid) is greater than that of aluminum.

[0094] Reference Figure 2 , Figure 4As shown, in some embodiments, the first portion 2121 includes a first surface 2123 and a second surface 2125 that are relatively arranged, the first surface 2123 is located between the substrate 1 and the second surface 2125, the intermediate layer 212 also includes a first side surface 2124 connecting the first surface 2123 and the second surface 2125, and the first encapsulation layer 41 is in contact with the first surface 2123, the first side surface 2124 and the second surface 2125.

[0095] Among them, a portion of the first packaging layer 41 is adhered to the first surface 2123, the first side surface 2124 and the second surface 2125 of the first part 2121. In other words, the first packaging layer 41 covers the upper and lower surfaces and sides of the protruding structure of the middle layer 212, forming a film-forming packaging structure along the upper and lower sides in the longitudinal direction, which can further enhance the packaging effect of the first packaging layer 41 and reduce product defects.

[0096] Reference Figure 3 As shown, in some embodiments, the first side wall 215 includes a first sub-side surface 2111 located at the first sub-support portion 211 and a second sub-side surface 2131 located at the second sub-support portion 213, and the first encapsulation layer 41 is in contact with at least a portion of the first sub-side surface 2111 and at the same time in contact with at least a portion of the second sub-side surface 2131.

[0097] Optionally, the first sub-side surface 2111 and the second sub-side surface 2131 are arranged on the same plane. The first sub-side surface 2111 and the second sub-side surface 2131 are formed by synchronously etching the sidewall of the support portion 21, and the two can be located on the same inclined surface or the same curved surface.

[0098] Optionally, the crown 22 includes a third surface 221 and a fourth surface 223 that are relatively arranged, the third surface 221 is located between the substrate 1 and the fourth surface 223, the crown 22 also includes a second side surface 222 connecting the third surface 221 and the fourth surface 223, and the first encapsulation layer 41 is in contact with at least a portion of the third surface 221 and at the same time in contact with the second side surface 222.

[0099] Optionally, the material of the crown 22 includes titanium.

[0100] Specifically, the first encapsulation layer 41 extends from the side surface of the light-emitting unit 3 away from the substrate 1 to the first sub-side surface 2111 of the covering part, and continuously contacts the first surface 2123, the first side surface 2124 and the second surface 2125 of the protruding structure 210, continuously covers the second sub-side surface 2131, continuously contacts the third surface 221 and the second side surface 222, and extends to the side of the isolation structure 2 away from the substrate 1. Through the continuous encapsulation of the first encapsulation layer 41, it is possible to effectively block external water vapor and oxygen, prevent them from invading the light-emitting unit, avoid the performance degradation or even failure of the light-emitting material due to moisture and oxidation, and extend the service life of the display panel 100.

[0101] Reference Figure 5 As shown, in some embodiments, the light-emitting unit 3 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1, the light-emitting layer 32 and the second electrode 33 are located in the isolation opening 20, the support portion 21 includes a conductive structure, and the second electrode 33 includes an overlapping portion electrically connected to the first sub-support portion 211. In the direction perpendicular to the substrate 1, there is a gap between the overlapping portion of the second electrode 33 and the intermediate layer 212.

[0102] Specifically, the second electrodes 33 are connected via the isolation structure 2 to form a common electrode for driving.

[0103] Optionally, the first electrode 31 includes an anode, and the second electrode 33 includes a cathode.

[0104] Specifically, the position of the intermediate layer 212 in the isolation structure 2 is limited to the side of the overlapped portion of the second electrode 33 away from the substrate 1. In the actual manufacturing process, the isolation structure 2 will limit the evaporation range of the evaporation material, and the cathode material can be evaporated along the edge of the crown 22 to the side wall of the first sub-support portion 211 in the support portion 21 to form an overlapped portion. The overlapped portion is located below the intermediate layer 212, which can ensure that the intermediate layer 212 will not block the cathode evaporation angle and avoid affecting the cathode evaporation position.

[0105] Reference Figure 5 As shown, in some embodiments, the isolation structure 2 further includes an auxiliary support portion 23, which is located on a side of the support portion 21 away from the crown portion 22 and is a conductive structure. The second electrode 33 is electrically connected to a surface of the auxiliary support portion 23 away from the substrate 1.

[0106] Optionally, the orthographic projection of the auxiliary support portion 23 on the base plate 1 is located within the orthographic projection of the crown portion 22 on the base plate 1 .

[0107] Optionally, the orthographic projection of the side of the support portion 21 close to the substrate 1 on the substrate 1 is located within the orthographic projection of the auxiliary support portion 23 on the substrate 1 .

[0108] Optionally, the material of the auxiliary supporting portion 23 includes molybdenum.

[0109] Compared with the side wall of the support part 21, the second electrode 33 is easier to deposit on the upper surface of the auxiliary support part 23 and has a greater thickness, which can reduce the impedance of the connection between the second electrode 33 and the isolation structure 2. In addition, the etching resistance of the auxiliary support part 23 can be greater than the etching resistance of the support part 21, and less than the etching resistance of the crown part 22. In this way, in the etching process, a Figure 5 The isolation structure 2 is shown.

[0110] Reference Figure 5 As shown, in some embodiments, the display panel 100 also includes a pixel defining layer 5, wherein the pixel defining layer 5 is located between the isolation structure 2 and the substrate 1, and is defined with a plurality of pixel openings 50 respectively corresponding to and connected to the isolation openings 20, and the orthographic projection of the pixel opening 50 on the substrate 1 is located within the orthographic projection of the isolation opening 20 on the substrate 1.

[0111] Optionally, the pixel defining layer 5 at least covers the edge of the first electrode 31 .

[0112] Optionally, the pixel defining layer 5 covers the gaps between adjacent first electrodes 31 .

[0113] Optionally, the pixel defining layer 5 includes an inorganic layer.

[0114] Among them, the pixel defining layer 5 can avoid the pollution caused by being set as an organic material, and the inorganic layer has a smaller thickness than the organic layer, thereby reducing the overall height of the isolation structure 2 to increase the viewing angle of the display panel. In addition, this solution is also conducive to the lightweight design of the display panel.

[0115] Based on the same inventive concept, Figure 6 As shown, some other embodiments of the present application provide a display panel 100, which includes a substrate 1 and an isolation structure 2, the isolation structure 2 is disposed on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 20, and the isolation openings 20 accommodate at least part of the film layer of the light-emitting unit 3. The isolation structure 2 includes a support portion 21 and a crown portion 22, and the crown portion 22 is located on a side of the support portion 21 away from the substrate 1. The orthographic projection of the support portion 21 on the substrate 1 is located within the orthographic projection of the crown portion 22 on the substrate 1.

[0116] The supporting portion 21 includes a first side wall 215 for enclosing the isolation opening 20 , and the first side wall 215 is provided with a protruding structure 210 .

[0117] Specifically, the support portion 21 can be set as an integrated structure, that is, the support portion 21 can be formed of the same material. For example, a protective glue can be used to engrave the support portion 21 in sections. It should be noted that the process for preparing the support portion 21 with the protruding structure 210 can be selected according to actual process conditions, and the embodiments of the present application are not limited to this.

[0118] In the display panel 100 provided in the embodiment of the present application, a protruding structure 210 is provided at the first side wall 215 of the support portion 21. During the film layer packaging process, the first packaging layer can cover the protruding structure and be more tightly combined with the support portion 21, thereby improving the packaging effect, slowing down the failure factor from damaging the light-emitting material, reducing product defects, and improving display performance.

[0119] Reference Figure 6 As shown, in some embodiments, the display panel 100 further includes a first encapsulation layer 41, which covers the surface of the light-emitting unit 3 away from the substrate 1, and also covers at least a portion of the first side wall 215, and extends to a side of the isolation structure 2 away from the substrate 1. At least a portion of the first encapsulation layer 41 is in contact with the surface of the protruding structure 210.

[0120] Optional, reference Figure 4 The protruding structure 210 includes a first surface 2123 and a second surface 2125 that are arranged opposite to each other, the first surface 2123 is located between the substrate 1 and the second surface 2125, the protruding structure 210 also includes a first side surface 2124 connecting the first surface 2123 and the second surface 2125, and the first encapsulation layer 41 is in contact with the first surface 2123, the first side surface 2124 and the second surface 2125.

[0121] Among them, a portion of the first packaging layer 41 is adhered to the first surface 2123, the first side surface 2124 and the second surface 2125 of the first part 2121. In other words, the first packaging layer 41 covers the upper and lower surfaces and sides of the protruding structure 210, and can form a film along the up and down directions to form a longitudinal packaging structure, which can further enhance the packaging effect of the first packaging layer 41 and reduce product defects.

[0122] In some of the embodiments, the supporting portion 21 includes a first sub-supporting portion 211, an intermediate layer 212, and a second sub-supporting portion 213 which are stacked in sequence along a direction away from the substrate 1, the first side wall 215 includes a first sub-side surface 2111 located at the first sub-supporting portion 211 and a second sub-side surface 2131 located at the second sub-supporting portion 213, and the intermediate layer 212 protrudes from the first sub-side surface 2111 and the second sub-side surface 2131 along a direction parallel to the substrate 1 and extending into the isolation opening 20 to form a protruding structure 210.

[0123] Optionally, the corrosion resistance of the material of the intermediate layer 212 is greater than the corrosion resistance of the materials of the first sub-support portion 211 and the second sub-support portion 213 .

[0124] Specifically, the middle layer 212 is made of alkali-resistant but not acid-resistant material. In the process of forming the isolation structure 2, the side wall of the support part 21 is treated with an alkaline solution. The first sub-support part 211 and the second sub-support part 213 are corroded back by the lateral solution. The middle layer material is difficult to be corroded and is retained as a raised structure 210, forming a "pagoda-shaped" structure with the first sub-support part 211 and the second sub-support part 213.

[0125] Optionally, the material of the intermediate layer 212 includes molybdenum or indium tin oxide.

[0126] Optionally, the material of the first sub-support portion 211 and the second sub-support portion 213 includes aluminum. The corrosion resistance of molybdenum or indium tin oxide (for example, relative to alkaline liquid) is greater than that of aluminum.

[0127] In some embodiments, the light-emitting unit 3 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1, the light-emitting layer 32 and the second electrode 33 are located in the isolation opening 20, the support portion 21 includes a conductive structure, the second electrode 33 overlaps with the first side wall 215, and the overlapping position is located on a side of the protruding structure 210 close to the substrate 1. In the direction perpendicular to the substrate 1, there is a gap between the second electrode 33 and the protruding structure 210.

[0128] Optionally, the first electrode 31 includes an anode, and the second electrode 33 includes a cathode.

[0129] Based on the same inventive concept, Figure 7 As shown, some other embodiments of the present application provide a method for preparing a display panel. The structure of the prepared display panel 100 can refer to Figure 2 or Figure 5 The method for preparing the display panel comprises the following steps:

[0130] Step S1, stacking a first sub-support layer, an intermediate layer, a second sub-support layer and a third support layer on a substrate 1 in sequence to form an isolation structure 2, wherein the isolation structure 2 includes a support layer and a crown 22, the support layer includes a first sub-support layer, an intermediate layer and a second sub-support layer, the crown 22 includes a third support layer, and the orthographic projection of the support layer on the substrate 1 is within the orthographic projection of the crown 22 on the substrate 1, which can be referred to Figure 8 .

[0131] Step S2, etching the sidewalls of the first sub-support layer and the second sub-support layer to form a first sub-support portion 211 and a second sub-support portion 213; wherein the orthographic projections of the side of the first sub-support portion 211 close to the middle layer 212 and the side of the second sub-support portion 213 close to the middle layer 212 on the substrate 1 are located within the orthographic projection of the middle layer 212 on the substrate 1, which can be referred to Fig. 9 .

[0132] In the method for preparing a display panel provided in an embodiment of the present application, an intermediate layer 212 is arranged in the isolation structure 2, and the intermediate layer 212 protrudes outward on the side wall of the isolation structure 2. During the film layer packaging process, the first packaging layer can cover the protruding portion of the intermediate layer 212, and the combination with the isolation structure 2 is tighter, thereby improving the packaging effect, slowing down the failure factor that damages the light-emitting material, reducing product defects, and improving display performance.

[0133] Specifically, the corrosion resistance of the material of the intermediate layer 212 is greater than the corrosion resistance of the materials of the first sub-support portion 211 and the second sub-support portion 213 .

[0134] Specifically, the middle layer 212 is made of alkali-resistant but not acid-resistant material. In the process of forming the isolation structure 2, the side wall of the support part 21 is treated with an alkaline solution. The first sub-support part 211 and the second sub-support part 213 are corroded backward by the lateral solution, and the middle layer material cannot be corroded and is retained, forming a "pagoda-shaped" structure.

[0135] Optionally, the material of the intermediate layer 212 includes molybdenum or indium tin oxide.

[0136] Optionally, the middle layer 212 includes a multi-layer structure. The multi-layer structure can increase the thickness of the middle layer 212 to increase the strength of the connection with the first packaging layer 41 and improve the packaging effect.

[0137] Optionally, the first sub-support portion 211 and the second sub-support portion 213 are made of the same material.

[0138] Optionally, the material of the first sub-support portion 211 and the second sub-support portion 213 includes aluminum.

[0139] In some embodiments, after step S2, the method for preparing a display panel further includes the following steps:

[0140] Step S3, stacking the light-emitting layer, the second electrode 33 and the first encapsulation layer on the substrate 1 in sequence, and patterning them to form a light-emitting unit 3 and a corresponding encapsulation part; wherein the second electrode 33 overlaps the first sub-support part 211, and the encapsulation part covers the surface of the corresponding light-emitting unit 3 away from the substrate 1, and also covers the side walls of the first sub-support part 211, the intermediate layer 212 and the second sub-support part 213, and extends to the side of the crown 22 away from the substrate 1, which can be referred to Fig.10 .

[0141] The position of the intermediate layer 212 in the isolation structure 2 is limited to the side of the overlapped portion of the second electrode 33 away from the substrate 1. In the actual manufacturing process, the isolation structure 2 will limit the evaporation range of the evaporation material, and the cathode material can be evaporated along the edge of the crown 22 to the side wall of the first sub-support portion 211 in the support portion 21 to form an overlapped portion. The overlapped portion is located below the intermediate layer 212, which can ensure that the intermediate layer 212 will not block the cathode evaporation angle and avoid affecting the cathode evaporation position.

[0142] Other embodiments of the present application disclose 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.).

[0143] In the display device of the present embodiment, in its display panel 100, an intermediate layer 212 is provided on the support portion 21, and the intermediate layer 212 forms a protruding structure protruding on the side wall of the support portion 21. Then, in the film layer packaging process, the first packaging layer can cover the protruding structure located in the intermediate layer 212, and be more closely combined with the support portion 21, thereby improving the packaging effect, slowing down the failure factor from damaging the luminescent material, reducing product defects, and improving the display performance.

[0144] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0145] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; an isolation structure, the isolation structure being located at one side of the substrate, the isolation structure enclosing a plurality of isolation openings for accommodating at least part of the light-emitting units, the isolation structure comprising a support portion and a crown portion located at a side of the support portion away from the substrate, the orthographic projection of the support portion on the substrate being located within the orthographic projection of the crown portion on the substrate; In which, the supporting part includes a first sub-supporting part, an intermediate layer, and a second sub-supporting part which are stacked in sequence in a direction away from the substrate, and an area of ​​an orthographic projection of the intermediate layer on the substrate is larger than an area of ​​an orthographic projection of a side of the first sub-supporting part close to the intermediate layer and a side of the second sub-supporting part close to the intermediate layer on the substrate; and the orthographic projections of a side of the first sub-supporting part close to the intermediate layer and a side of the second sub-supporting part close to the intermediate layer on the substrate are located within the orthographic projection of the intermediate layer on the substrate.

2. The display panel according to claim 1, characterized in that: The display panel further includes a first encapsulation layer, the support portion includes a first side wall surrounding the isolation opening; the first encapsulation layer is disposed on a side of the isolation structure and the light-emitting unit away from the substrate, and the first encapsulation layer covers a surface of the light-emitting unit away from the substrate and at least a portion of the first side wall, and extends to a side of the isolation structure away from the substrate; the first encapsulation layer is in contact with the intermediate layer; Preferably, the orthographic projection of the end of the first side wall close to the crown on the base plate is located within the orthographic projection of the end of the first side wall close to the base plate on the base plate; Preferably, the orthographic projection of the second sub-support portion on the substrate is located within the orthographic projection of the first sub-support portion on the substrate.

3. The display panel according to claim 2, characterized in that: The intermediate layer comprises a first portion and a second portion, wherein an orthographic projection of the first portion on the substrate at least partially surrounds an orthographic projection of the second portion on the substrate; The orthographic projection of the first portion on the substrate at least partially surrounds the orthographic projections of a side of the first sub-support portion close to the middle layer and a side of the second sub-support portion close to the middle layer on the substrate; Preferably, the corrosion resistance of the material of the intermediate layer is greater than the corrosion resistance of the material of the first sub-support part and the second sub-support part; Preferably, the material of the intermediate layer includes molybdenum or indium tin oxide; Preferably, the intermediate layer comprises a multi-layer structure; Preferably, the first sub-support portion and the second sub-support portion are made of the same material; Preferably, the material of the first sub-support portion and the second sub-support portion includes aluminum.

4. The display panel according to claim 3, characterized in that: The first part includes a first surface and a second surface arranged opposite to each other, the first surface is located between the substrate and the second surface, the intermediate layer also includes a first side surface connecting the first surface and the second surface, and the first packaging layer is in contact with the first surface, the first side surface and the second surface.

5. The display panel according to claim 2, characterized in that: The first side wall includes a first sub-side surface located at the first sub-support portion and a second sub-side surface located at the second sub-support portion, and the first encapsulation layer contacts at least a portion of the first sub-side surface and contacts at least a portion of the second sub-side surface; Preferably, the first sub-side surface and the second sub-side surface are arranged coplanarly; Preferably, the crown portion includes a third surface and a fourth surface that are arranged opposite to each other, the third surface is located between the substrate and the fourth surface, the crown portion also includes a second side surface connecting the third surface and the fourth surface, and the first encapsulation layer is in contact with at least a portion of the third surface and is in contact with the second side surface; Preferably, the material of the crown comprises titanium.

6. The display panel according to claim 1, characterized in that: The light-emitting unit comprises a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, the light-emitting layer and the second electrode are located in the isolation opening, the support portion comprises a conductive structure, and the second electrode comprises a lap portion electrically connected to the first sub-support portion; In a direction perpendicular to the substrate, there is a gap between the overlapping portion and the intermediate layer; Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

7. The display panel according to claim 6, characterized in that: The isolation structure further includes an auxiliary support portion, which is located on a side of the support portion away from the crown portion and is a conductive structure, and the second electrode is electrically connected to a surface of the auxiliary support portion away from the substrate; Preferably, the orthographic projection of the auxiliary support portion on the base plate is located within the orthographic projection of the crown portion on the base plate; Preferably, the orthographic projection of the side of the support portion close to the substrate on the substrate is located within the orthographic projection of the auxiliary support portion on the substrate; Preferably, the material of the auxiliary supporting part includes molybdenum.

8. The display panel according to claim 6, characterized in that: The display panel further includes a pixel defining layer, the pixel defining layer is located between the isolation structure and the substrate, and defines a plurality of pixel openings correspondingly connected to the isolation openings, respectively, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the isolation openings on the substrate; Preferably, the pixel defining layer at least covers an edge of the first electrode; Preferably, the pixel defining layer covers the gap between adjacent first electrodes; Preferably, the pixel defining layer comprises an inorganic layer.

9. A display panel, characterized in that: include: substrate; an isolation structure, the isolation structure being located at 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 located at a side of the support portion away from the substrate, the orthographic projection of the support portion on the substrate being located within the orthographic projection of the crown portion on the substrate; Wherein, the supporting portion comprises a first side wall for enclosing the isolation opening, and the first side wall is provided with a protruding structure.

10. The display panel according to claim 9, characterized in that: The display panel further includes a first encapsulation layer, the first encapsulation layer covers a surface of the light-emitting unit away from the substrate, covers at least a portion of the first side wall, and extends to a side of the isolation structure away from the substrate; at least a portion of the first encapsulation layer is bonded to a surface of the protruding structure; Preferably, the raised structure includes a first surface and a second surface that are oppositely arranged, the first surface is located between the substrate and the second surface, the raised structure also includes a first side surface connecting the first surface and the second surface, and the first encapsulation layer is in contact with the first surface, the first side surface and the second surface.

11. The display panel according to claim 9, characterized in that: The support portion includes a first sub-support portion, an intermediate layer, and a second sub-support portion stacked in sequence in a direction away from the substrate, the first side wall includes a first sub-side surface located at the first sub-support portion and a second sub-side surface located at the second sub-support portion, and the intermediate layer protrudes from the first sub-side surface and the second sub-side surface in a direction parallel to the substrate and extending into the isolation opening to form the protruding structure; Preferably, the corrosion resistance of the material of the intermediate layer is greater than the corrosion resistance of the material of the first sub-support part and the second sub-support part; Preferably, the material of the intermediate layer includes molybdenum or indium tin oxide; Preferably, the material of the first sub-support portion and the second sub-support portion includes aluminum.

12. The display panel according to claim 9, characterized in that: The light-emitting unit comprises a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, the light-emitting layer and the second electrode are located in the isolation opening, the support portion comprises a conductive structure, the second electrode overlaps with the first side wall, and the overlapping position is located on a side of the protruding structure close to the substrate; In a direction perpendicular to the substrate, there is a gap between the second electrode and the protruding structure; Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

13. A method for preparing a display panel, characterized in that: The method comprises: A first sub-support layer, an intermediate layer, a second sub-support layer and a third support layer are sequentially stacked on a substrate to form an isolation structure; wherein the isolation structure comprises a support layer and a crown portion, the support layer comprises the first sub-support layer, the intermediate layer and the second sub-support layer, the crown portion comprises the third support layer, and the orthographic projection of the support layer on the substrate is located within the orthographic projection of the crown portion on the substrate; The side walls of the first sub-support layer and the second sub-support layer are etched to form a first sub-support portion and a second sub-support portion; wherein the orthographic projections of a side of the first sub-support portion close to the middle layer and a side of the second sub-support portion close to the middle layer on the substrate are located within the orthographic projection of the middle layer on the substrate.

14. The method for manufacturing a display panel according to claim 13, characterized in that: After the step of etching the sidewalls of the first sub-support layer and the second sub-support layer to form the first sub-support portion and the second sub-support portion, the preparation method further comprises: A light-emitting layer, a second electrode and a first packaging layer are sequentially stacked on the substrate and patterned to form a light-emitting unit and a corresponding packaging portion; wherein the second electrode overlaps the first sub-support portion, and the packaging portion covers the surface of the corresponding light-emitting unit away from the substrate, and also covers the side walls of the first sub-support portion, the intermediate layer and the second sub-support layer, and extends to the side of the crown away from the substrate.

15. A display device, characterized in that: A display panel comprising the display panel according to any one of claims 1 to 12 or a display panel prepared by the method for preparing a display panel according to any one of claims 13 to 14.

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