Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the isolation structure is located on one side of the substrate, an isolation opening is defined by the isolation structure, the isolation opening is used for containing the light-emitting unit, and the isolation structure comprises an isolation groove; and the first packaging layer covers the surface of one side, far away from the substrate, of the light emitting unit, covers the surface of one side, far away from the substrate, of the isolation structure between the isolation opening and the isolation groove, and at least covers the side wall of the isolation groove. According to the display panel, the isolation groove is formed in the isolation structure, so that the coverage area of the first packaging layer can extend to the side wall of the isolation groove from the light-emitting unit in the isolation opening, gas or liquid medicine in the etching process is prevented from entering the pixel area where the light-emitting unit is located along the isolation structure, the light-emitting material and the isolation structure are protected from being eroded, and the display quality is improved. The dark spot phenomenon is improved, and the display effect 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 dark spots, which affects the display effect. 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 dark spots and enhancing display effects.

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

[0006] substrate;

[0007] An isolation structure, the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove;

[0008] The first encapsulation layer covers a surface of the light emitting unit away from the substrate, covers a surface of the isolation structure between the isolation opening and the isolation groove away from the substrate, and covers at least a portion of a side wall of the isolation groove.

[0009] In one embodiment, the isolation groove is located outside the isolation opening where the corresponding light emitting unit is located.

[0010] In one embodiment, the isolation groove is arranged around the isolation opening.

[0011] In one embodiment, a concave-convex structure is provided on a side wall of the isolation structure close to the isolation opening and / or a side wall of the isolation groove;

[0012] Preferably, the concavo-convex structure comprises burrs.

[0013] In one embodiment, a dimension of the isolation trench in a direction perpendicular to the substrate is smaller than a dimension of the isolation structure in a direction perpendicular to the substrate.

[0014] In one embodiment, the display panel further includes:

[0015] A connecting structure, the connecting structure is located between the substrate and the isolation structure, and two parts of the isolation structure separated by the isolation groove are electrically connected through the connecting structure;

[0016] Preferably, the material of the connecting structure includes titanium.

[0017] In one embodiment, the isolation structure includes a first isolation portion, a second isolation portion, and a third isolation portion stacked in sequence in a direction away from the substrate, and the isolation trench runs through the third isolation portion, the second isolation portion, and the first isolation portion;

[0018] Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of the third isolating portion on the substrate;

[0019] Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of one end of the second isolating portion close to the first isolating portion on the substrate;

[0020] Preferably, the material of the first isolation portion includes molybdenum;

[0021] Preferably, the material of the second isolation portion includes aluminum;

[0022] Preferably, the material of the third isolation portion includes titanium.

[0023] In one embodiment, the portions of the first isolation portion located on both sides of the isolation trench are electrically connected via a connection structure;

[0024] Preferably, an orthographic projection of the first isolation portion on the substrate overlaps with an orthographic projection of the connection structure on the substrate.

[0025] In one embodiment, the isolation structure includes a second isolation portion and a third isolation portion stacked in sequence in a direction away from the substrate, and the isolation trench runs through the third isolation portion and the second isolation portion;

[0026] Preferably, the parts of the second isolation portion located on both sides of the isolation groove are electrically connected via a connection structure;

[0027] Preferably, the orthographic projection of the second isolation portion on the substrate overlaps with the orthographic projection of the connection structure on the substrate;

[0028] Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of the third isolating portion on the substrate;

[0029] Preferably, the material of the second isolation portion includes aluminum;

[0030] Preferably, the material of the third isolation portion includes titanium.

[0031] In one embodiment, the first encapsulation layer includes an encapsulation portion, and the encapsulation portion extends from a surface of a side of the corresponding light-emitting unit away from the substrate to a side wall of the isolation groove;

[0032] Preferably, there is a gap between the packaging parts corresponding to adjacent light-emitting units, and the gap is located in the isolation groove.

[0033] In one embodiment, the display panel further includes a second encapsulation layer, the second encapsulation layer is located on a side of the first encapsulation layer away from the substrate, and the second encapsulation layer fills the isolation groove;

[0034] Preferably, the second encapsulation layer is an organic layer;

[0035] Preferably, the display panel further comprises a third encapsulation layer, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer;

[0036] Preferably, the first encapsulation layer and the third encapsulation layer are inorganic layers.

[0037] In one embodiment, the light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode stacked sequentially on a substrate in a direction away from the substrate, at least part of the light-emitting functional layer and the second electrode are located in the isolation opening, and the second electrode is electrically connected to the isolation structure;

[0038] Preferably, the first electrode comprises an anode and the second electrode comprises a cathode.

[0039] In one embodiment, a portion of the light-emitting functional layer and the second electrode are located between a surface of the isolation structure away from the substrate and the first packaging layer.

[0040] In one embodiment, the display panel further includes:

[0041] The pixel definition layer defines a pixel opening corresponding to the isolation opening; the isolation structure is located on a side of the pixel definition layer away from the substrate.

[0042] Preferably, the connection structure is located on a side of the pixel definition layer away from the substrate.

[0043] Based on the same inventive concept, the present application also provides a display panel, including:

[0044] substrate;

[0045] An isolation structure, the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove;

[0046] The isolation groove is located outside the isolation opening where the corresponding light emitting unit is located.

[0047] In one embodiment, a concave-convex structure is provided on a side wall of the isolation structure close to the isolation opening and / or a side wall of the isolation groove;

[0048] Preferably, the concavo-convex structure comprises burrs;

[0049] Preferably, the material of the isolation structure includes aluminum.

[0050] In one embodiment, the display panel includes:

[0051] A connecting structure, the connecting structure is located between the substrate and the isolation structure, and two parts of the isolation structure separated by the isolation groove are electrically connected through the connecting structure;

[0052] Preferably, the material of the connecting structure includes titanium.

[0053] Based on the same inventive concept, the present application also provides a method for preparing a display panel, the method comprising:

[0054] An isolation structure is formed on one side of the substrate; wherein the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove;

[0055] A first encapsulation layer is formed on the side of the isolation structure away from the substrate; wherein the first encapsulation layer covers the surface of the light-emitting unit away from the substrate, covers the surface of the isolation structure between the isolation opening and the isolation groove away from the substrate, and covers at least part of the side wall of the isolation groove.

[0056] In one embodiment, before the step of forming an isolation structure on one side of the substrate, the preparation method further includes:

[0057] forming a connection layer on one side of the substrate;

[0058] The connection layer is etched to form a connection structure.

[0059] In one embodiment, an isolation structure is formed on one side of a substrate, comprising:

[0060] A first isolation layer, a second isolation layer and a third isolation layer are sequentially formed on a side of the connection structure away from the substrate;

[0061] The third isolation layer, the second isolation layer and the first isolation layer are etched to form an isolation structure; the isolation structure includes a first isolation portion located in the first isolation layer, a second isolation portion located in the second isolation layer, and a third isolation portion located in the third isolation layer, and an isolation groove runs through the third isolation portion, the second isolation portion and the first isolation portion; and portions of the first isolation portion located on both sides of the isolation groove are electrically connected through a connection structure;

[0062] Preferably, the orthographic projection of the first isolation portion on the substrate overlaps with the orthographic projection of the connection structure on the substrate;

[0063] Preferably, the material of the second isolation portion includes metal, and the sidewall of the second isolation portion forms burrs through oxidation.

[0064] Based on the same inventive concept, the present application also provides a display device, which includes the above-mentioned display panel.

[0065] Compared with the prior art, the display panel provided by the present application forms an isolation groove in the isolation structure so that the coverage of the first encapsulation layer can extend from the light-emitting unit in the isolation opening to the side wall of the isolation groove, thereby covering the isolation structure located between the isolation opening and the isolation groove. The covering property is stronger, and the path for the gas or liquid to reach the light-emitting unit during the etching process is extended, thereby preventing the gas or liquid during the etching process from entering the pixel area where the light-emitting unit is located along the isolation structure, protecting the light-emitting material and the isolation structure from being corroded, improving the dark spot phenomenon, and enhancing the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] 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.

[0067] Figure 1 is a schematic diagram of a hierarchical structure of a related display panel;

[0068] Figure 2 A schematic diagram of a hierarchical structure of a display panel provided in an embodiment of the present application;

[0069] Figure 3 A schematic diagram of the structure of a display panel provided in one embodiment of the present application;

[0070] Figure 4 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0071] Figure 5 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0072] Figure 6 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0073] Figure 7 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0074] Figure 8 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0075] Fig. 9 A schematic diagram of an intermediate structure in a process of preparing a display panel provided by another embodiment of the present application;

[0076] Fig.10 A schematic diagram of an intermediate structure in a process of preparing a display panel provided by another embodiment of the present application;

[0077] Fig.11 A schematic diagram of an intermediate structure in a process of preparing a display panel provided by another embodiment of the present application;

[0078] Fig.12 A schematic diagram of an intermediate structure in a process of preparing a display panel provided by another embodiment of the present application;

[0079] Fig.13 A schematic diagram of a hierarchical structure of a display panel provided in another embodiment of the present application;

[0080] Fig.14 A flow chart of a method for preparing a display panel provided in another embodiment of the present application.

[0081] Marking description: 100, display panel; 10, substrate; 11, isolation structure; 110, isolation opening; 111, isolation groove; 112, first part; 113, second part; 114, concave-convex structure; 115, first isolation part; 116, second isolation part; 117, third isolation part; 121, first encapsulation layer; 120, encapsulation part; 122, second encapsulation layer; 123, third encapsulation layer; 13, light-emitting unit; 131, first electrode; 132, light-emitting functional layer; 133, second electrode; 140, connection layer; 14, connection structure; 15, pixel definition layer; 150, pixel opening; 20, dark spot. DETAILED DESCRIPTION

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Reference Figure 1 , is a related display panel 100, the display panel 100 includes a substrate 10, an isolation structure 11, and a first encapsulation layer 121. The isolation structure 11 is located on one side of the substrate 10, and the isolation structure 11 encloses an isolation opening 110 for accommodating a light-emitting unit 13. The first encapsulation layer 121 at least covers the light-emitting unit 13 and part of the isolation structure 11. In the preparation process of the display panel 100, repeated etching is required to complete pixel patterning. Etching includes dry etching (Dry Etching) and wet etching (Wet Etching).

[0086] After long-term research, the inventors found that in the related technology, the first encapsulation layer 121 mainly covers the side wall of the isolation structure 11 close to the isolation opening 110, and covers a part of the surface of the isolation structure away from the substrate 10. During the preparation process, the drug solution or water vapor will enter along the first encapsulation layer 121 and corrode the isolation structure 11, and erode the light-emitting material in the light-emitting unit 13, resulting in the generation of dark spots 20.

[0087] Based on this, the present application provides a display panel and a method for manufacturing the same, and a display device to solve the above technical problems, as detailed in the following embodiments.

[0088] Reference Figure 2 As shown, an embodiment of the present application provides a display panel 100, which includes a substrate 10, an isolation structure 11, and a first encapsulation layer 121. The isolation structure 11 is located on one side of the substrate 10. The isolation structure 11 encloses an isolation opening 110. The isolation opening 110 is used to accommodate a light-emitting unit 13. The isolation structure 11 includes an isolation groove 111. The first encapsulation layer 121 covers the surface of the light-emitting unit 13 away from the substrate 10, covers the surface of the isolation structure 11 between the isolation opening 110 and the isolation groove 111 away from the substrate 10, and the first encapsulation layer 121 also covers the sidewalls of the isolation groove 111. The isolation structure 11 located between the isolation opening 110 and the isolation groove 111 refers to the main part of the isolation structure 11 located between the isolation opening 110 and the isolation groove 111.

[0089] The display panel 100 provided in the present application forms an isolation groove 111 in the isolation structure 11, so that the coverage range of the first encapsulation layer 121 can extend from the light-emitting unit 13 in the isolation opening 110 to the side wall of the isolation groove 111, and can cover part of the side wall or all of the side wall of the isolation groove 111, thereby covering the part of the isolation structure 11 located between the isolation opening 110 and the isolation groove 111, and the covering property is stronger, which prolongs the path for the gas or liquid to reach the light-emitting unit 13 during the etching process, and can prevent the etching liquid or water vapor from entering the pixel area where the light-emitting unit 13 is located along the isolation structure 11, thereby protecting the light-emitting material and the isolation structure 11 from being corroded, improving the dark spot phenomenon, and enhancing the display effect.

[0090] Specifically, the isolation structure 11 is separated by the isolation groove 111 to form a first part 112 and a second part 113, the side walls opposite to each other of the first part 112 and the second part 113 are the side walls of the isolation groove 111, and the side walls opposite to each other of the first part 112 and the second part 113 are the side walls corresponding to the isolation opening 110. The coverage of the first encapsulation layer 121 includes the light-emitting unit 13 located in the isolation opening 110, and the first part 112 or the second part 113 corresponding to the isolation opening 110, including the side walls opposite to each other and the side walls opposite to each other of the first part 112 and the second part 113.

[0091] Reference Figure 2 , Figure 3 As shown, in one embodiment, the isolation groove 111 is located outside the isolation opening 110 where the corresponding light emitting unit 13 is located.

[0092] The isolation structure 11 is grooved to obtain the isolation groove 111, and then, relative to the light emitting unit 13 located in the isolation opening 110, the isolation groove 111 is located outside the isolation opening 110. When the light emitting unit 13 in the isolation opening 110 is packaged, the first packaging layer 121 can extend outward from the isolation opening 110 to the isolation groove 111, thereby ensuring packaging performance.

[0093] In one embodiment, the isolation trench 111 is disposed around the isolation opening 110 .

[0094] Specifically, for one light emitting unit 13, the isolation groove 111 may be an annular groove structure surrounding the isolation opening 110. For the entire display panel 100, the isolation grooves 111 opened on the overall isolation structure 11 may be connected to form a grid structure.

[0095] In other embodiments, the isolation groove 111 may also be disconnected in the peripheral direction of the isolation opening 110 . For example, the isolation groove 111 may include an open ring or a discontinuous structure.

[0096] Reference Figure 4 As shown, in one embodiment, a concavo-convex structure 114 is provided on the side wall of the isolation structure 11 close to the isolation opening 110 and the side wall of the isolation groove 111. The side wall of the isolation structure 11 close to the isolation opening 110 and the side wall of the isolation groove 111 are respectively in contact with the first encapsulation layer 121, and the concavo-convex structure is formed at the position where the isolation structure 11 contacts the first encapsulation layer 121, which can enhance the tightness of the connection between the isolation structure 11 and the first encapsulation layer 121, and enhance the protection effect of the first encapsulation layer 121 on the light-emitting material and the isolation structure 11.

[0097] In other embodiments, one of the sidewall of the isolation structure 11 close to the isolation opening 110 and the sidewall close to the isolation trench 111 is provided with a concave-convex structure 114 to enhance the tightness of the connection between the first encapsulation layer 121 and the sidewall of the isolation structure 11 .

[0098] Preferably, the concavo-convex structure 114 includes burrs. Specifically, the burrs can be formed by metal oxidation. The metal sidewalls of the isolation structure 11 are exposed to air, thereby oxidation forms burrs to enhance the tightness of the connection.

[0099] In other embodiments, the concave-convex structure 114 may also be a concave or convex structure formed by other processes (such as etching).

[0100] Preferably, the material of the isolation structure 11 includes aluminum (Al), and the aluminum material of the sidewall of the isolation structure 11 is oxidized in the air to form a burr structure.

[0101] Reference Figure 2 , Figure 4 As shown, in one embodiment, the dimension of the isolation trench 111 in the direction perpendicular to the substrate 10 is smaller than the dimension of the isolation structure 11 in the direction perpendicular to the substrate 10 .

[0102] Specifically, the depth of the isolation trench 111 is less than the height of the isolation structure 11. In other words, the isolation trench 111 does not completely penetrate the isolation structure 11. For example, when the isolation structure 11 is a three-layer structure, the isolation trench 111 penetrates the top layer or the top two layers, but does not penetrate the bottom layer.

[0103] Reference Figure 5 As shown, in one embodiment, the display panel 100 further includes a connection structure 14 , which is disposed between the substrate 10 and the isolation structure 11 , and the two parts of the isolation structure 11 separated by the isolation groove 111 are electrically connected through the connection structure 14 .

[0104] The dimension of the isolation groove 111 in the direction perpendicular to the substrate 10 is equal to the dimension of the isolation structure 11 in the direction perpendicular to the substrate 10, that is, the isolation groove 111 runs through the entire isolation structure 11, and the isolation structure 11 is disconnected to form a first part 112 and a second part 113. The cathode of the light-emitting unit 13 overlaps with the first part 112 or the second part 113 of the corresponding isolation structure 11. In this embodiment, the first part 112 and the second part 113 are electrically connected through the newly added connection structure 14 to form a continuous overlap structure. In this way, the connection structure 14 and the isolation structure 11 can connect the cathode of the light-emitting unit 13 to form a common electrode for easy driving.

[0105] In other embodiments, the connection structure 14 may also be the original conductive film layer of the isolation structure 11 .

[0106] Preferably, the material of the connection structure 14 includes titanium (Ti), wherein the titanium material has good electrical conductivity.

[0107] Reference Figure 6 As shown, in one embodiment, the isolation structure 11 includes a first isolation portion 115, a second isolation portion 116 and a third isolation portion 117 stacked in sequence in a direction away from the substrate 10, and the isolation trench 111 runs through the third isolation portion 117, the second isolation portion 116 and the first isolation portion 115.

[0108] Specifically, the isolation structure 11 is a three-layer structure.

[0109] Preferably, the orthographic projection of one end of the second isolating portion 116 close to the third isolating portion 117 on the substrate 10 is located within the orthographic projection of the third isolating portion 117 on the substrate 10. Exemplarily, taking the plane where the substrate 10 is located as a reference, and the direction away from the side of the substrate 10 is upward, the third isolating portion 117 and the second isolating portion 116 form a T-shaped structure with a large top and a small bottom, which is convenient for evaporation to form a light-emitting unit, and effectively blocks the light-emitting functional layer of the adjacent light-emitting unit, so as to reduce the current crosstalk problem of the adjacent light-emitting units.

[0110] Preferably, the orthographic projection of one end of the second isolating portion 116 close to the third isolating portion 117 on the substrate 10 is located within the orthographic projection of one end of the second isolating portion 116 close to the first isolating portion 115 on the substrate 10. Exemplarily, the second isolating portion 116 is a regular trapezoidal structure with a small top and a large bottom.

[0111] Preferably, the material of the first isolation portion 115 includes molybdenum (Mo); the material of the second isolation portion 116 includes aluminum (Al); and the material of the third isolation portion 117 includes titanium (Ti).

[0112] Reference Figure 5 , Figure 6 As shown, in one embodiment, portions of the first isolation portion 115 located on both sides of the isolation trench 111 are electrically connected via the connection structure 14 .

[0113] Preferably, the orthographic projection of the first isolating portion 115 on the substrate 10 overlaps with the orthographic projection of the connecting structure 14 on the substrate 10. Specifically, the first isolating portion 115 covers the edge of the connecting structure 14. The first portion 112 and the second portion 113 located on both sides of the isolation groove 111 each include a stacked first isolating portion 115, a second isolating portion 116 and a third isolating portion 117, wherein the first isolating portions 115 on both sides of the isolation groove 111 are respectively overlapped with the connecting structure 14, so that the isolation structures 11 separated by the isolation groove 111 are electrically connected together, and at the same time, the cathodes of the light-emitting units 13 overlapped with the isolation structures 11 are electrically connected together.

[0114] Reference Figure 7 As shown, in one embodiment, the isolation structure 11 includes a second isolation portion 116 and a third isolation portion 117 sequentially stacked in a direction away from the substrate 10 , and the isolation trench 111 penetrates the third isolation portion 117 and the second isolation portion 116 .

[0115] Specifically, the isolation structure 11 is a two-layer structure.

[0116] Preferably, the orthographic projection of one end of the second isolating portion 116 close to the third isolating portion 117 on the substrate 10 is located within the orthographic projection of the third isolating portion 117 on the substrate 10. The third isolating portion 117 and the second isolating portion 116 form a T-shaped structure with a larger top and a smaller bottom, which is convenient for evaporation to form a light-emitting unit and effectively blocks the light-emitting functional layer of an adjacent light-emitting unit to reduce the current crosstalk problem of the adjacent light-emitting units.

[0117] Preferably, the material of the second isolation portion 116 includes aluminum; and the material of the third isolation portion 117 includes titanium.

[0118] Preferably, portions of the second isolation portion 116 located on both sides of the isolation trench 111 are electrically connected via a connection structure 14 .

[0119] Preferably, the orthographic projection of the second isolation portion 116 on the substrate 10 overlaps with the orthographic projection of the connection structure 14 on the substrate 10. Specifically, the second isolation portion 116 covers the edge of the connection structure 14. The first portion 112 and the second portion 113 located on both sides of the isolation groove 111 each include a stacked second isolation portion 116 and a third isolation portion 117, wherein the second isolation portions 116 on both sides of the isolation groove 111 are respectively overlapped with the connection structure 14, so that the isolation structures 11 separated by the isolation groove 111 are electrically connected together, and at the same time, the cathodes of the light-emitting units 13 overlapped with the isolation structures 11 are electrically connected together.

[0120] Reference Figure 2 As shown, in one embodiment, the first encapsulation layer 121 includes an encapsulation portion 120 , and the encapsulation portion 120 extends from a surface of the corresponding light emitting unit 13 away from the substrate 10 to a sidewall of the isolation trench 111 .

[0121] Preferably, there is a gap between the encapsulation parts 120 corresponding to adjacent light emitting units 13 , and the gap is located in the isolation groove 111 . In other words, the first encapsulation layer 121 is disconnected in the isolation groove 111 to form encapsulation parts 120 corresponding to different light emitting units 13 .

[0122] In one embodiment, the display panel 100 may further include a second encapsulation layer 122 . The second encapsulation layer 122 is located on a side of the first encapsulation layer 121 away from the substrate 10 . The second encapsulation layer 122 fills the isolation trench 111 .

[0123] Preferably, the second encapsulation layer 122 is an organic layer.

[0124] Preferably, the display panel 100 further includes a third encapsulation layer 123 , and the second encapsulation layer 122 is located between the first encapsulation layer 121 and the third encapsulation layer 123 .

[0125] Preferably, the first encapsulation layer 121 and the third encapsulation layer 123 are inorganic layers, which have high density to isolate water and oxygen. The second encapsulation layer 122 is an organic layer with a large thickness to flatten the surface of the display panel 100, thereby realizing inorganic-organic-inorganic three-layer encapsulation.

[0126] Reference Figure 2 , Figure 5 As shown, in one embodiment, the light-emitting unit 13 includes a first electrode 131, a light-emitting functional layer 132 and a second electrode 133 stacked in sequence on the substrate 10 in a direction away from the substrate 10, at least part of the light-emitting functional layer 132 and the second electrode 133 are located in the isolation opening 110, and the second electrode 133 is electrically connected to the isolation structure 11.

[0127] The first electrode 131 is one of the anode and the cathode, and the second electrode 133 is the other of the anode and the cathode. In the embodiment of the present application, the first electrode 131 is preferably an anode, and the second electrode 133 is preferably a cathode.

[0128] Specifically, the light emitting unit 13 corresponding to the side where the first portion 112 is located and the light emitting unit 13 corresponding to the side where the second portion 113 is located are two light emitting units 13 , and the colors of the light emitted by the two light emitting units 13 on both sides of the isolation groove 111 may be different.

[0129] Reference Figures 2 to 7 As shown, in one embodiment, a portion of the light-emitting functional layer 132 and the second electrode 133 are located between the surface of the isolation structure 11 away from the substrate 10 and the first encapsulation layer 121 .

[0130] Specifically, during the process of etching to form the light-emitting unit 13 , the etching gas or liquid medicine is unlikely to enter between the surface of the isolation structure 11 away from the substrate 10 and the first packaging layer 121 , and will not corrode the light-emitting unit 13 covered by the packaging portion 120 .

[0131] Reference Figure 2 , Figure 5 As shown, in one embodiment, the display panel 100 further includes a pixel definition layer 15, which defines a pixel opening 150 corresponding to the isolation opening 110; the isolation structure 11 is located on a side of the pixel definition layer 15 away from the substrate 10. The orthographic projection of the pixel opening 150 on the substrate 10 is located within the orthographic projection of the isolation opening 110 on the substrate 10.

[0132] Preferably, the connection structure 14 is located on a side of the pixel definition layer 15 away from the substrate 10. On the side of the pixel definition layer 15 away from the substrate 10, the isolation structure 11 is electrically connected to the connection structure 14.

[0133] Furthermore, the pixel definition layer 15 also covers the edges of the first electrodes 131 and the gaps between adjacent first electrodes 131 , so that the first electrodes 131 are partially exposed to the pixel opening 150 .

[0134] Optionally, the display panel may further include a touch film layer, a polarizer layer, an organic adhesive layer or a cover plate.

[0135] Based on the same inventive concept, another embodiment of the present application provides a display panel, referring to Figure 8 As shown, the display panel 100 includes a substrate 10 and an isolation structure 11, the isolation structure 11 is located on one side of the substrate 10, the isolation structure 11 encloses an isolation opening 110, the isolation opening 110 is used to accommodate the light-emitting unit 13, and the isolation structure 11 includes an isolation groove 111. The isolation groove 111 is located outside the isolation opening 110 where the corresponding light-emitting unit 13 is located.

[0136] The isolation structure 11 is grooved to obtain an isolation groove 111, which is located outside the isolation opening 110. When packaging the light emitting unit 13 in the isolation opening 110, the corresponding packaging part can extend outward from the isolation opening 110 to the isolation groove 111, thereby ensuring packaging performance.

[0137] Continue to refer to Figure 8 As shown, in one embodiment, a concave-convex structure 114 is disposed on the sidewall of the isolation structure 11 close to the isolation opening 110 and the sidewall of the isolation trench 111 .

[0138] Among them, by forming a concave-convex structure at the position where the isolation structure 11 contacts the first encapsulation layer 121, the tightness of the connection between the isolation structure 11 and the first encapsulation layer 121 can be enhanced, thereby enhancing the protection effect of the first encapsulation layer 121 on the light-emitting material and the isolation structure 11.

[0139] In other embodiments, one of the sidewall of the isolation structure 11 close to the isolation opening 110 and the sidewall close to the isolation trench 111 is provided with a concave-convex structure 114 to enhance the tightness of the connection between the first encapsulation layer 121 and the sidewall of the isolation structure 11 .

[0140] Preferably, the concavo-convex structure 114 includes burrs. Specifically, the burrs can be formed by metal oxidation. The metal sidewalls of the isolation structure 11 are exposed to air, thereby oxidation forms burrs to enhance the tightness of the connection.

[0141] In other embodiments, the concave-convex structure 114 may also be a concave or convex structure formed by other processes (such as etching).

[0142] Preferably, the material of the isolation structure 11 includes aluminum (Al), and the aluminum material of the sidewall of the isolation structure 11 is oxidized in the air to form a burr structure.

[0143] Reference Figure 8 As shown, in one embodiment, the display panel 100 further includes a connection structure 14 , which is disposed between the substrate 10 and the isolation structure 11 , and the two parts of the isolation structure 11 separated by the isolation groove 111 are electrically connected through the connection structure 14 .

[0144] The isolation groove 111 runs through the entire isolation structure 11, and the isolation structure 11 is disconnected to form a first portion 112 and a second portion 113. The cathode of the light-emitting unit 13 overlaps with the first portion 112 or the second portion 113 of the corresponding isolation structure 11. In this embodiment, the first portion 112 and the second portion 113 are electrically connected by a newly added connection structure 14 to form a continuous overlap structure. In this way, the connection structure 14 and the isolation structure 11 can connect the cathode of the light-emitting unit 13 to form a common electrode for easy driving.

[0145] In other embodiments, the connection structure 14 may also be the original conductive film layer of the isolation structure 11 .

[0146] Preferably, the material of the connection structure 14 includes titanium (Ti), wherein the titanium material has good electrical conductivity.

[0147] Based on the same inventive concept, Fig.14 As shown, another embodiment of the present application provides a method for preparing a display panel, wherein the display panel 100 prepared by the preparation method can refer to Figures 2 to 7 .

[0148] The method for preparing the display panel 100 includes the following steps:

[0149] Step S1, forming an isolation structure 11 on one side of the substrate 10; wherein the isolation structure 11 encloses an isolation opening 110, the isolation opening 110 is used to accommodate the light-emitting unit 13, and the isolation structure 11 includes an isolation groove 111. Fig.11 , Fig.12 .

[0150] Step S2, forming a first encapsulation layer 121 on the side of the isolation structure 11 away from the substrate 10; wherein the first encapsulation layer 121 covers the surface of the light emitting unit 13 away from the substrate 10, covers the surface of the isolation structure 11 between the isolation opening 110 and the isolation groove 111 away from the substrate 10, and the first encapsulation layer 121 also covers at least part of the side wall of the isolation groove 111. Fig.13 .

[0151] The preparation method of the display panel 100 provided in the present application forms an isolation groove 111 in the isolation structure 11, so that the coverage range of the first encapsulation layer 121 can extend from the light-emitting unit 13 in the isolation opening 110 to the side wall of the isolation groove 111, thereby covering the part of the isolation structure 11 located between the isolation opening 110 and the isolation groove 111, and the covering property is stronger, which can prevent the gas or liquid in the etching process from entering the pixel area where the light-emitting unit 13 is located along the isolation structure 11, protect the light-emitting material and the isolation structure 11 from being corroded, improve the dark spot phenomenon, and enhance the display effect.

[0152] Reference Fig. 9 , Fig.10 As shown, in one embodiment, before step S1, the method for preparing the display panel 100 further includes:

[0153] A connection layer 140 is formed on one side of the substrate 10 ; the connection layer 140 is etched to form a connection structure 14 .

[0154] Reference Figures 6 to 8 As shown, in one embodiment, step S1 further includes the following sub-steps:

[0155] Step S11, forming a first isolation layer, a second isolation layer and a third isolation layer in sequence on a side of the connection structure 14 away from the substrate 10;

[0156] Step S12, etching the third isolation layer, the second isolation layer and the first isolation layer to obtain an isolation structure 11; the isolation structure 11 includes a first isolation portion 115 located in the first isolation layer, a second isolation portion 116 located in the second isolation layer and a third isolation portion 117 located in the third isolation layer, and an isolation groove 111 passes through the third isolation portion 117, the second isolation portion 116 and the first isolation portion 115; the portion of the first isolation portion 115 located in the isolation groove 111 is electrically connected through the connecting structure 14.

[0157] Preferably, the orthographic projection of the first isolation portion 115 on the substrate 10 overlaps with the orthographic projection of the connection structure 14 on the substrate 10 .

[0158] Preferably, the material of the second isolation portion 116 includes metal, and the sidewall of the second isolation portion 116 forms burrs through oxidation.

[0159] The two parts of the isolation structure 11 separated by the isolation groove 111 are electrically connected by adding a connection structure 14. In this way, the connection structure 14 and the isolation structure 11 can connect the second electrode 133 of the light-emitting unit 13 to form a common electrode for driving.

[0160] Another embodiment of the present application provides a display device, which includes the display panel 100 in the above embodiment. The display device can be located in a smart device (such as a mobile phone, VR device, computer, TV, car display, etc.).

[0161] The display device provided in the present application has a display panel 100 in which an isolation groove 111 is formed in the isolation structure 11, so that the coverage of the first encapsulation layer 121 can extend from the light-emitting unit 13 in the isolation opening 110 to the side wall of the isolation groove 111, thereby covering a portion of the isolation structure 11 located between the isolation opening 110 and the isolation groove 111, and the covering property is stronger, which can prevent the gas or liquid in the etching process from entering the pixel area where the light-emitting unit 13 is located along the isolation structure 11, protect the light-emitting material and the isolation structure 11 from being corroded, improve the dark spot phenomenon, and enhance the display effect.

[0162] 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.

[0163] It should be noted that the above is a description of an embodiment 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.

[0164] 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, the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove; A first encapsulation layer covers a surface of the light emitting unit away from the substrate, covers a surface of the isolation structure between the isolation opening and the isolation groove away from the substrate, and covers at least a portion of a side wall of the isolation groove.

2. The display panel according to claim 1, characterized in that: The isolation groove is located outside the isolation opening where the corresponding light emitting unit is located.

3. The display panel according to claim 1, characterized in that: The isolation groove is arranged around the isolation opening.

4. The display panel according to claim 1, characterized in that: A concave-convex structure is provided on a side wall of the isolation structure close to the isolation opening and / or a side wall of the isolation groove; Preferably, the concavo-convex structure includes burrs.

5. The display panel according to claim 1, characterized in that: A dimension of the isolation trench in a direction perpendicular to the substrate is smaller than a dimension of the isolation structure in a direction perpendicular to the substrate.

6. The display panel according to claim 1, characterized in that: The display panel further includes: A connecting structure, wherein the connecting structure is disposed between the substrate and the isolation structure, and two parts of the isolation structure separated by the isolation groove are electrically connected through the connecting structure; Preferably, the material of the connecting structure includes titanium.

7. The display panel according to claim 6, characterized in that: The isolation structure comprises a first isolation portion, a second isolation portion and a third isolation portion which are sequentially stacked in a direction away from the substrate; Preferably, the isolation groove runs through the third isolation portion, the second isolation portion and the first isolation portion; Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of the third isolating portion on the substrate; Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of one end of the second isolating portion close to the first isolating portion on the substrate; Preferably, the material of the first isolation portion includes molybdenum; Preferably, the material of the second isolation portion includes aluminum; Preferably, the material of the third isolation portion includes titanium.

8. The display panel according to claim 7, characterized in that: Portions of the first isolation portion located on both sides of the isolation groove are electrically connected via the connection structure; Preferably, an orthographic projection of the first isolation portion on the substrate overlaps with an orthographic projection of the connection structure on the substrate.

9. The display panel according to claim 6, characterized in that: The isolation structure comprises a second isolation portion and a third isolation portion stacked in sequence in a direction away from the substrate, and the isolation trench penetrates the third isolation portion and the second isolation portion; Preferably, the parts of the second isolation portion located on both sides of the isolation groove are electrically connected through the connection structure; Preferably, the orthographic projection of the second isolation portion on the substrate overlaps with the orthographic projection of the connection structure on the substrate; Preferably, the orthographic projection of one end of the second isolating portion close to the third isolating portion on the substrate is located within the orthographic projection of the third isolating portion on the substrate; Preferably, the material of the second isolation portion includes aluminum; Preferably, the material of the third isolation portion includes titanium.

10. The display panel according to claim 1, characterized in that: The first encapsulation layer includes an encapsulation portion, and the encapsulation portion extends from a surface of a side of the corresponding light-emitting unit away from the substrate to a side wall of the isolation groove; Preferably, there is a gap between the packaging parts corresponding to adjacent light-emitting units, and the gap is located in the isolation groove.

11. The display panel according to claim 1, characterized in that: The light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked on the substrate in a direction away from the substrate, at least part of the light-emitting functional layer and the second electrode are located in the isolation opening, and the second electrode is electrically connected to the isolation structure; Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode; Preferably, the display panel further comprises a second encapsulation layer, the second encapsulation layer is located on a side of the first encapsulation layer away from the substrate, and the second encapsulation layer fills the isolation groove; Preferably, the second encapsulation layer is an organic layer; Preferably, the display panel further comprises a third encapsulation layer, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer; Preferably, the first encapsulation layer and the third encapsulation layer are inorganic layers.

12. The display panel according to claim 11, characterized in that: Part of the light-emitting functional layer and the second electrode are located between a surface of the isolation structure that is away from the substrate and the first packaging layer.

13. The display panel according to claim 6, characterized in that: The display panel further includes: A pixel definition layer, wherein the pixel definition layer defines a pixel opening corresponding to the isolation opening; the isolation structure is located on a side of the pixel definition layer away from the substrate; Preferably, the connection structure is located on a side of the pixel definition layer away from the substrate.

14. A display panel, characterized in that: include: substrate; An isolation structure, the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove; The isolation groove is located outside the isolation opening where the corresponding light emitting unit is located.

15. The display panel according to claim 14, characterized in that: A concave-convex structure is provided on a side wall of the isolation structure close to the isolation opening and / or a side wall of the isolation groove; Preferably, the concavo-convex structure comprises burrs; Preferably, the material of the isolation structure includes aluminum.

16. The display panel according to claim 14, characterized in that: The display panel comprises: A connecting structure, the connecting structure is located between the substrate and the isolation structure, and two parts of the isolation structure separated by the isolation groove are electrically connected through the connecting structure; Preferably, the material of the connecting structure includes titanium.

17. A method for preparing a display panel, characterized in that: The method comprises: An isolation structure is formed on one side of the substrate; wherein the isolation structure encloses an isolation opening, the isolation opening is used to accommodate the light-emitting unit, and the isolation structure includes an isolation groove; A first encapsulation layer is formed on a side of the isolation structure away from the substrate; wherein the first encapsulation layer covers a surface of the light-emitting unit away from the substrate, covers a surface of the isolation structure between the isolation opening and the isolation groove away from the substrate, and covers at least a portion of the side wall of the isolation groove.

18. The method for preparing a display panel according to claim 17, characterized in that: Before the step of forming an isolation structure on one side of the substrate, the preparation method further includes: forming a connection layer on one side of the substrate; The connection layer is etched to form a connection structure.

19. The method for preparing a display panel according to claim 18, characterized in that: The isolation structure is formed on one side of the substrate, comprising: sequentially forming a stacked first isolation layer, a second isolation layer and a third isolation layer on a side of the connection structure away from the substrate; The third isolation layer, the second isolation layer and the first isolation layer are etched to form the isolation structure; the isolation structure comprises a first isolation portion located in the first isolation layer, a second isolation portion located in the second isolation layer, and a third isolation portion located in the third isolation layer, the isolation groove runs through the third isolation portion, the second isolation portion and the first isolation portion; portions of the first isolation portion located on both sides of the isolation groove are electrically connected through the connection structure; Preferably, the orthographic projection of the first isolation portion on the substrate overlaps with the orthographic projection of the connection structure on the substrate; Preferably, the material of the second isolation portion includes metal, and the sidewall of the second isolation portion forms burrs through oxidation.

20. A display device, characterized in that: A display panel comprising any one of claims 1-16.

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