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, an isolation structure, a light-emitting unit and a conductive structure, the isolation structure is arranged on one side of the substrate, a first opening is defined by the isolation structure, and the light-emitting unit is arranged in the first opening; the light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode which are sequentially arranged in a stacked mode in the direction away from the substrate, and the second electrode is electrically connected with the isolation structure through a conductive structure. According to the display panel provided by the invention, the conductive structure is arranged, and the second electrode is electrically connected with the isolation structure through the conductive structure, so that a new effective electron injection transmission path is added between the second electrode and the isolation structure, and the electrical connection effect between the second electrode and the isolation structure is improved; therefore, poor connection between the second electrode and the isolation structure is avoided, pixel dark spots are further avoided, and the display performance of the display panel 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] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

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

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

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

[0006] substrate;

[0007] The isolation structure and the second electrode are both arranged on one side of the substrate;

[0008] A conductive structure, wherein the second electrode is electrically connected to the isolation structure through the conductive structure.

[0009] In one embodiment, the isolation structure encloses a first opening, the display panel further includes a first electrode and a light-emitting layer, the first electrode, the light-emitting layer and the second electrode are stacked in sequence in a direction away from the substrate, the first electrode, the light-emitting layer and the second electrode constitute a light-emitting unit, and the conductive structure is partially located between the substrate and the isolation structure, and partially located between the substrate and the second electrode.

[0010] In one embodiment, the conductive structure and the first electrode are in the same layer and are spaced apart from each other;

[0011] Preferably, the material of the conductive structure is the same as that of the first electrode;

[0012] Preferably, the conductive structure and the first electrode are prepared simultaneously through the same process.

[0013] In one embodiment, the display panel further includes a pixel defining layer, and the pixel defining layer encloses the second opening and the third opening;

[0014] The isolation structure is electrically connected to the conductive structure through the second opening, and the second electrode is electrically connected to the conductive structure through the third opening;

[0015] Preferably, the second opening and the third opening are formed by etching.

[0016] In one embodiment, the isolation structure is partially located in the second opening, and the second electrode is partially located in the third opening.

[0017] In one embodiment, the pixel defining layer covers the gaps between adjacent first electrodes and the edges of the first electrodes, so that the pixel opening exposes the first electrodes;

[0018] Preferably, the third opening is located between the second opening and the pixel opening.

[0019] In one embodiment, the edge of the second electrode overlaps the isolation structure;

[0020] Preferably, the isolation structure comprises a support portion and a crown portion, the crown portion is located on a side of the support portion away from the substrate, and an area of ​​an orthographic projection of an end of the support portion close to the crown portion on the substrate is smaller than an area of ​​an orthographic projection of the crown portion on the substrate;

[0021] Preferably, the orthographic projection of one end of the support portion close to the crown portion on the substrate is located within the orthographic projection of the crown portion on the substrate;

[0022] Preferably, the support portion is made of a conductive material, and an edge of the second electrode overlaps a side surface of the support portion;

[0023] Preferably, a overlapping step is provided on the support portion, and the second electrode overlaps the overlapping step.

[0024] In one embodiment, the support portion includes a first sub-support portion and a second sub-support portion, the first sub-support portion is located between the second sub-support portion and the substrate, an orthographic projection area of ​​the first sub-support portion on the substrate is larger than an orthographic projection area of ​​the second sub-support portion on the substrate, and 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, and the second electrode overlaps the first sub-support portion;

[0025] Preferably, the second electrode is also overlapped with the second sub-support portion.

[0026] In one embodiment, the display panel further includes an encapsulation layer, and the encapsulation layer covers the second electrode and the isolation structure.

[0027] In one embodiment, the first openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings are respectively used to accommodate the light-emitting units with different colors of emitted light.

[0028] Based on the same inventive concept, the present application also discloses a method for preparing a display panel, which comprises:

[0029] providing a substrate;

[0030] forming a conductive structure on one side of the substrate;

[0031] forming an isolation structure on a side of the conductive structure away from the substrate;

[0032] A second electrode is formed on a side of the conductive structure away from the substrate, and the second electrode is electrically connected to the isolation structure through the conductive structure.

[0033] Preferably, the first electrode is formed while forming the conductive structure on one side of the substrate.

[0034] Preferably, the preparation method further comprises:

[0035] forming a pixel definition layer on a side of the first electrode and the conductive structure away from the substrate;

[0036] forming a second opening and a third opening on the pixel definition layer to expose the conductive structure;

[0037] The isolation structure is electrically connected to the conductive structure through the second opening, and the second electrode is electrically connected to the conductive structure through the third opening;

[0038] Preferably, the third opening is located between the second opening and the pixel opening;

[0039] Preferably, the pixel opening is formed on the pixel defining layer by etching.

[0040] In one embodiment, a pixel opening is further formed on the pixel defining layer to expose the first electrode;

[0041] Preferably, the isolation structure encloses a first opening, and the pixel opening is located within the first opening.

[0042] In one embodiment, the preparation method further comprises:

[0043] A light emitting layer is formed on a side of the first electrode located in the pixel opening and away from the substrate, and the second electrode covers the light emitting layer.

[0044] In one embodiment, forming a first electrode while forming a conductive structure on one side of the substrate includes:

[0045] forming a first electrode layer on one side of the substrate;

[0046] The first electrode layer is etched to form first electrodes and conductive structures that are isolated from each other.

[0047] In one embodiment, the second opening and the third opening are formed on the pixel defining layer by etching.

[0048] In one embodiment, forming an isolation structure on a side of the pixel defining layer away from the substrate includes:

[0049] forming an isolation layer on a side of the pixel defining layer away from the substrate;

[0050] The isolation layer is etched to form the isolation structure.

[0051] In one embodiment, the preparation method further comprises:

[0052] An encapsulation layer is formed on a side of the second electrode and the isolation structure away from the substrate.

[0053] Based on the same inventive concept, the present application also discloses a display device, which includes the above-mentioned display panel.

[0054] Compared with the prior art, the display panel provided by the present application is provided with a conductive structure, and the second electrode and the isolation structure are electrically connected through the conductive structure, which is equivalent to adding a new effective electron injection transmission path between the second electrode and the isolation structure, thereby improving the electrical connection effect between the second electrode and the isolation structure, avoiding poor connection between the second electrode and the isolation structure, and further avoiding the occurrence of pixel dark spots, thereby improving the display performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 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.

[0056] Figure 1 is a schematic diagram of a related display panel;

[0057] Figure 2 is a schematic diagram of a hierarchical structure of a related display panel;

[0058] Figure 3 A schematic diagram of the layer structure of a display panel provided in an embodiment of the present application;

[0059] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0060] Figure 5 A schematic diagram of a layer structure of a display panel is provided for another embodiment of the present application;

[0061] Figure 6 A flow chart of a method for preparing a display panel is provided for another embodiment of the present application;

[0062] Figures 7a to 7f FIG. 4 is a schematic diagram of a method for manufacturing a display panel in another embodiment of the present application.

[0063] Marking Description:

[0064] 100, display panel; 200, evaporation source;

[0065] 1. Substrate;

[0066] 2. Isolation structure; 21. First opening; 22. Support portion; 221. First sub-support portion; 222. Second sub-support portion; 23. Crown portion;

[0067] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting layer; 33. Second electrode;

[0068] 4. Conductive structure;

[0069] 5. pixel defining layer; 511. second opening; 521. third opening; 53. pixel opening;

[0070] 6. Encapsulation layer;

[0071] 7. First electrode layer. DETAILED DESCRIPTION

[0072] 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.

[0073] 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.

[0074] Reference Figure 1-2 As shown, it is a schematic diagram of the structure of a related display panel, which includes a substrate 1 and an isolation structure 2 arranged on one side of the substrate 1. The isolation structure 2 encloses an opening for accommodating a light-emitting unit 3. Adjacent light-emitting units 3 are separated by the isolation structure 2. The light-emitting units 3 generally include R, G, and B, which are respectively used to emit red light, green light, and blue light. Therefore, the above-mentioned openings also include multiple types of openings for accommodating different light-emitting units 3. Among them, the light-emitting unit 3 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33, which are stacked and sequentially away from the substrate 1, and the second electrode 33 overlaps the isolation structure 2.

[0075] Among them, an isolation structure 2 is set at the gap between the light-emitting units 3 to separate the functional film layers of adjacent light-emitting units 3. In this way, in the evaporation process of multiple functional film layers, it is only necessary to perform evaporation on the entire surface of the display panel, without the need to use a mask plate to evaporate the area where the light-emitting unit is located to form a functional film layer. Therefore, the process of evaporation using the isolation structure 2 does not need to consider the positioning accuracy during evaporation, so that the gap between the light-emitting units 3 can be designed to be smaller in size to increase the pixel density.

[0076] After long-term research, the inventors found that the second electrode 33 is usually vapor-deposited on the entire surface of the vapor deposition source 200, and overlapped with the isolation structure 2 to achieve circuit conduction. However, in the actual preparation process, due to the vapor deposition angle of the vapor deposition source 200, the isolation structure 2 presents a structure that is larger at the top and smaller at the bottom, which will block the vapor deposition material during vapor deposition, resulting in a thinner cathode vapor-deposited below the isolation structure 2, resulting in a poor overlap effect between the second electrode 33 and the isolation structure 2, and there is a risk of dark pixels.

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

[0078] Reference Figure 3-Figure 4 As shown, an embodiment of the present application discloses a display panel 100, which includes a substrate 1, an isolation structure 2, a second electrode 33 and a conductive structure 4. The isolation structure 2 and the second electrode are both arranged on one side of the substrate 1, and the second electrode 33 is electrically connected to the isolation structure 2 through the conductive structure 4.

[0079] The electrons in the isolation structure 2 can enter the second electrode 33 through the conductive structure 4 .

[0080] The display panel 100 provided in this embodiment is provided with a conductive structure 4, and the second electrode 33 is electrically connected to the isolation structure 2 through the conductive structure 4, which is equivalent to adding a new effective electron injection transmission path between the second electrode 33 and the isolation structure 2, thereby improving the electrical connection effect between the second electrode 33 and the isolation structure 2, avoiding poor connection between the second electrode 33 and the isolation structure 2, and further avoiding the occurrence of pixel dark spots, thereby improving the display performance of the display panel 100.

[0081] In one embodiment of the present application, the first electrode 31 is an anode, and the second electrode 33 is a cathode.

[0082] It should be noted that, since the light-emitting unit 3 generally includes R, G, and B, which are used to emit red light, green light, and blue light, respectively, the first opening 21 also includes three types of first openings 21 for accommodating R, G, and B, respectively. Since the sizes of R, G, and B are different, the sizes of the three types of first openings 21 are also different.

[0083] Please refer to Figure 4 As shown, in one embodiment, the isolation structure 2 encloses the first opening 21, and the display panel 100 further includes a first electrode 31 and a light-emitting layer 32. The first electrode 31, the light-emitting layer 32, and the second electrode 33 are sequentially stacked in a direction away from the substrate 1. The first electrode 31, the light-emitting layer 32, and the second electrode 33 constitute a light-emitting unit 3. The conductive structure 4 is partially located between the substrate 1 and the isolation structure 2, and partially located between the substrate 1 and the second electrode 33. That is, an effective electron injection and transmission path is formed between the substrate 1 and the isolation structure 2, and between the substrate 1 and the second electrode 33, so as to ensure the stability of the electrical connection between the second electrode 33 and the isolation structure 2.

[0084] Please refer to Figure 4 As shown, in one embodiment, the conductive structure 4 and the first electrode 31 are in the same layer and are spaced apart to ensure that the conductive structure 4 and the first electrode 31 are isolated from each other. At the same time, the conductive structure 4 and the first electrode 31 being in the same layer is conducive to the preparation of the first electrode 31.

[0085] Preferably, the material of the conductive structure 4 is the same as that of the first electrode 31 , which is beneficial to improving the manufacturing efficiency and reducing the cost.

[0086] Preferably, the conductive structure 4 and the first electrode 31 are prepared simultaneously through the same process, thereby improving the preparation efficiency. Further, the conductive structure 4 and the first electrode 31 can be formed by etching the same electrode layer.

[0087] Please continue to refer to Figure 4 As shown, in one embodiment, the display panel 100 further includes a pixel defining layer 5, which encloses a second opening 511 and a third opening 521, the isolation structure 2 is electrically connected to the conductive structure 4 through the second opening 511, and the second electrode 33 is electrically connected to the conductive structure 4 through the third opening 521.

[0088] The pixel defining layer 5 determines the shape and position of the light emitting unit 3, and isolates the first electrode 31 from the isolation structure 2. By forming a second opening 511 on the pixel defining layer 5 below the isolation structure 2, the isolation structure 2 is electrically connected to the conductive structure 4, and a third opening 521 is formed on the pixel defining layer 5 below the second electrode 33, the second electrode 33 is electrically connected to the conductive structure 4, thereby achieving electrical connection between the isolation structure 2 and the second electrode 33.

[0089] Preferably, part of the isolation structure 2 is located in the second opening 511, and part of the second electrode 33 is located in the third opening 521, that is, during preparation, part of the isolation structure 2 is prepared in the second opening 511, and part of the second electrode 33 is prepared in the third opening 521, thereby ensuring a sufficiently large contact area between the isolation structure 2 and the conductive structure 4, and between the second electrode 33 and the conductive structure 4, thereby ensuring the stability of the connection between the isolation structure 2 and the conductive structure 4, and between the second electrode 33 and the conductive structure 4.

[0090] Preferably, the second opening 511 and the third opening 521 are formed by etching. Specifically, after preparing the pixel defining layer 5, the second opening 511 and the third opening 521 are etched on the pixel defining layer 5 on the conductive structure 4, and the etching depth is the thickness of the pixel defining layer 5, that is, the etching is carried out to the surface of the conductive structure 4.

[0091] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel defining layer 5 further encloses to form a pixel opening 53, the pixel opening 53 is located in the first opening 21, the second electrode 33 and the light-emitting layer 32 are at least partially located in the pixel opening 53, and the pixel defining layer 5 covers the gaps between adjacent first electrodes 31 and the edges of the first electrodes 31, so that the pixel opening 53 exposes the first electrode 31. Thus, the first electrode 31 can have a larger design area without contacting the isolation structure 2, so that the light-emitting unit 3 has a larger effective light-emitting area.

[0092] Preferably, the third opening 521 is located between the second opening 511 and the pixel opening 53 , so that the third opening 521 is as close to the second electrode 33 as possible, ensuring a larger contact area between the conductive structure 4 and the second electrode 33 , thereby improving the electrical connection effect.

[0093] In one embodiment, the edge of the second electrode 33 overlaps the isolation structure 2, forming a new effective electron injection transmission path, thereby improving the electrical connection effect between the second electrode 33 and the isolation structure 2. The second electrode 33 is electrically connected to the support portion 22, so that the support portion 22 of the isolation structure 2 connects the second electrode 33 in series, so that the support portion 22 and the second electrode 33 constitute a common electrode for easy driving.

[0094] Please continue to refer to Figure 3 As shown, in one embodiment, the isolation structure 2 includes a support portion 22 and a crown portion 23, the crown portion 23 is located on the side of the support portion 22 away from the substrate 1, and the area of ​​the orthographic projection of one end of the support portion 22 close to the crown portion 23 on the substrate 1 is smaller than the area of ​​the orthographic projection of the crown portion 23 on the substrate 1. In this way, at least the portion of the isolation structure 2 away from the substrate 1 is set to a shape that is wide at the top and narrow at the bottom, so that the isolation structure 2 can block the light-emitting layer 32 of the adjacent light-emitting unit 3 to reduce the current crosstalk problem of the adjacent light-emitting unit 3.

[0095] Preferably, the orthographic projection of one end of the support portion 22 close to the crown portion 23 on the substrate 1 is located within the orthographic projection of the crown portion 23 on the substrate 1 , so as to facilitate film formation of the encapsulation layer on the side of the support portion 22 .

[0096] Preferably, the support portion 22 is made of a conductive material, and the edge of the second electrode 33 overlaps with the side surface of the support portion 22, thereby forming a new effective electron injection and transmission path.

[0097] It should be noted that the material of the second electrode 33 can be a metal material. The smaller the thickness of the second electrode 33, the higher its light transmittance, but the higher its resistivity. If the thickness of the second electrode 33 is too small, the voltage drop of the second electrode 33 (the common electrode in this case) will be too large when the isolation structure 2 is not provided. In this embodiment, the second electrode 33 is connected to the conductive support portion 22, and the thickness restriction of the second electrode 33 can be lifted, so that the second electrode 33 has a smaller thickness and has a higher light transmittance.

[0098] Please refer to Figure 4As shown, in one embodiment, the support portion 22 includes a first sub-support portion 221 and a second sub-support portion 222, the first sub-support portion 221 is located between the second sub-support portion 222 and the substrate 1, the orthographic projection area of ​​the first sub-support portion 221 on the substrate 1 is larger than the orthographic projection area of ​​the second sub-support portion 222 on the substrate 1, and the orthographic projection of the second sub-support portion 222 on the substrate 1 is located within the orthographic projection of the first sub-support portion 221 on the substrate 1, and the second electrode 33 overlaps the first sub-support portion 221, which is beneficial to ensure the stability of the electrical connection between the first sub-support portion 221 and the second electrode 33 and reduce the occurrence of poor connection.

[0099] Preferably, the second electrode 33 is also overlapped with the second sub-support portion 222 , which is beneficial to increase the electrical overlap area and further improve the electrical connection effect.

[0100] Please refer to Figure 5 As shown, in one embodiment, the display panel 100 further includes an encapsulation layer 6 , which covers the second electrode 33 and the isolation structure 2 , and is used to protect the light emitting unit 3 and the isolation structure 2 .

[0101] Furthermore, the encapsulation layer 6 includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer. The second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer. The first encapsulation layer and the third encapsulation layer are inorganic layers. The inorganic layers have high density to isolate water and oxygen. The second encapsulation layer 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.

[0102] In one embodiment, the first opening 21 includes a first type of opening, a second type of opening, and a third type of opening, and the first type of opening, the second type of opening, and the third type of opening respectively define light-emitting units 3 with different colors of emitted light, thereby improving the richness of the display of the display panel 100. Exemplarily, the light-emitting units 3 of different colors include light-emitting units R, light-emitting units B, and light-emitting units G. Further, the first type of opening, the second type of opening, and the third type of opening can be set as needed, and their shapes and sizes may be different, and are not specifically limited.

[0103] Based on the same inventive concept, Figure 6 As shown, another embodiment of the present application discloses a method for preparing a display panel. The display panel 100 prepared by the preparation method can refer to Figure 3-Figure 4 The method for preparing the display panel comprises the following steps:

[0104] Step S10, providing a substrate 1;

[0105] Step S20, forming a conductive structure 4 on one side of the substrate 1; Figure 7b .

[0106] Step S30, forming an isolation structure 2 on a side of the conductive structure 4 away from the substrate 1; Figure 7e .

[0107] Step S40, forming a second electrode 33 on a side of the conductive structure 4 away from the substrate 1, the second electrode 33 is electrically connected to the isolation structure 2 through the conductive structure 4; Figure 4 .

[0108] The preparation method of the display panel 100 provided in this embodiment sets a conductive structure 4, and the second electrode 33 is electrically connected to the isolation structure 2 through the conductive structure 4, which is equivalent to adding a new effective electron injection transmission path between the second electrode 33 and the isolation structure 2, thereby improving the electrical connection effect between the second electrode 33 and the isolation structure 2, avoiding poor connection between the second electrode 33 and the isolation structure 2, and further avoiding the occurrence of pixel dark spots, thereby improving the display performance of the display panel 100.

[0109] In one embodiment, in step S20, a first electrode 31 is formed while forming a conductive structure 4 on one side of the substrate 1, referring to Figure 7b .

[0110] In one embodiment, the following steps are also included:

[0111] A pixel definition layer 5 is formed on the side of the first electrode 31 and the conductive structure 4 away from the substrate 1, referring to Figure 7c ;

[0112] A second opening 511 and a third opening 521 are formed on the pixel definition layer 5 to expose the conductive structure 4. Figure 7d The isolation structure 2 is electrically connected to the conductive structure 4 through the second opening 511, and the second electrode 33 is electrically connected to the conductive structure 4 through the third opening 521, referring to Figure 4 .

[0113] In one embodiment, a pixel opening 53 is further formed on the pixel defining layer 5 to expose the first electrode 31 , so as to facilitate the preparation of a light-emitting layer on the exposed first electrode 31 .

[0114] Preferably, the third opening 521 is located between the second opening 511 and the pixel opening 53 , so that the third opening 521 is as close to the second electrode 33 as possible, ensuring a larger contact area between the conductive structure 4 and the second electrode 33 , thereby improving the electrical connection effect.

[0115] Preferably, the pixel opening 53 is formed on the pixel defining layer 5 by etching.

[0116] Preferably, the isolation structure 2 encloses and forms the first opening 21 , and the pixel opening 53 is located in the first opening 21 , and the first opening 21 is used to accommodate the light-emitting unit. Further, the light-emitting unit is at least partially located in the pixel opening 53 .

[0117] In one embodiment, the preparation method further comprises:

[0118] A light emitting layer 32 is formed on a side of the first electrode 31 located in the pixel opening 53 away from the substrate 1, and a second electrode 33 covers the light emitting layer 32. Figure 7f The first electrode 31 , the light-emitting layer 32 and the second electrode 33 constitute the light-emitting unit 3 .

[0119] In one embodiment, forming the first electrode 31 while forming the conductive structure 4 on one side of the substrate 1 includes the following steps:

[0120] A first electrode layer 7 is formed on one side of the substrate 1; Figure 7a .

[0121] The first electrode layer 7 is etched to form a first electrode 31 and a conductive structure 4 which are separated from each other; Figure 7b .

[0122] The conductive structure 4 and the first electrode 31 are prepared simultaneously through the same process, thereby improving the preparation efficiency.

[0123] Preferably, forming the second opening 511 and the third opening 521 on the pixel defining layer 5 includes:

[0124] The second opening 511 and the third opening 521 are formed on the pixel defining layer 5 by etching. The etching depth is the thickness of the pixel defining layer 5, that is, the etching reaches the surface of the conductive structure 4.

[0125] In one embodiment, step S30, forming an isolation structure 2 on one side of the substrate 1, comprises the following steps:

[0126] forming an isolation layer on one side of the substrate 1;

[0127] The isolation layer is etched to form an isolation structure 2, referring to Figure 7e .

[0128] Preferably, the isolation structure 2 includes a support portion 22 and a crown portion 23, the crown portion 23 is located on the side of the support portion 22 away from the substrate 1, and the area of ​​the orthographic projection of one end of the support portion 22 close to the crown portion 23 on the substrate 1 is smaller than the area of ​​the orthographic projection of the crown portion 23 on the substrate 1. In this way, at least the portion of the isolation structure 2 away from the substrate 1 is set to a shape that is wide at the top and narrow at the bottom, so that the isolation structure 2 can block the light-emitting layer 32 of the adjacent light-emitting unit 3 to reduce the current crosstalk problem of the adjacent light-emitting units 3.

[0129] In one embodiment, the preparation method further comprises the following steps:

[0130] An encapsulation layer 6 is formed on the side of the second electrode 33 and the isolation structure 2 away from the substrate 1, referring to Figure 5 The encapsulation layer 6 is used to protect the light-emitting unit and the isolation structure 2. Furthermore, the encapsulation layer 6 includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer, the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer, the first encapsulation layer and the third encapsulation layer are inorganic layers, the inorganic layers have high density to isolate water and oxygen, and the second encapsulation layer is an organic layer, so it has a large thickness to flatten the surface of the display panel, realizing inorganic-organic-inorganic three-layer encapsulation.

[0131] Another embodiment of the present application discloses a display device, which includes the display panel 100 in the above embodiment. The display device can be on a smart device (such as a mobile phone, VR device, computer, television, car display, etc.).

[0132] In the display device in this embodiment, the display panel 100 is provided with a conductive structure 4, and the second electrode 33 is electrically connected to the isolation structure 2 through the conductive structure 4, which is equivalent to adding a new effective electron injection transmission path between the second electrode 33 and the isolation structure 2, thereby improving the electrical connection effect between the second electrode 33 and the isolation structure 2, avoiding poor connection between the second electrode 33 and the isolation structure 2, and further avoiding the occurrence of pixel dark spots, thereby improving the display performance of the display panel 100, thereby improving the performance of the display device.

[0133] Patent applications PCT / CN2023 / 134518, 202310759370.2, 202310740412.8, 202310707209.0, and 202311346196.5 record relevant technical solutions of the isolation structure 2, and their contents are incorporated into this application by reference for reference.

[0134] 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.

[0135] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0136] 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; The isolation structure and the second electrode are both arranged on one side of the substrate; A conductive structure, wherein the second electrode is electrically connected to the isolation structure through the conductive structure.

2. The display panel according to claim 1, wherein: The isolation structure encloses a first opening, and the display panel also includes a first electrode and a light-emitting layer. The first electrode, the light-emitting layer and the second electrode are stacked in sequence in a direction away from the substrate. The first electrode, the light-emitting layer and the second electrode constitute a light-emitting unit. The conductive structure is partially located between the substrate and the isolation structure, and partially located between the substrate and the second electrode.

3. The display panel according to claim 2, wherein: The conductive structure and the first electrode are in the same layer and are spaced apart from each other; Preferably, the material of the conductive structure is the same as that of the first electrode; Preferably, the conductive structure and the first electrode are prepared simultaneously through the same process.

4. The display panel according to claim 2, wherein: The display panel further includes a pixel defining layer, the pixel defining layer encloses a second opening and a third opening; the isolation structure is electrically connected to the conductive structure through the second opening, and the second electrode is electrically connected to the conductive structure through the third opening; Preferably, the second opening and the third opening are formed by etching.

5. The display panel according to claim 4, wherein: The isolation structure is at least partially located in the second opening, and the second electrode is partially located in the third opening.

6. The display panel according to claim 4, wherein: The pixel defining layer also encloses a pixel opening, which is located within the first opening, and the second electrode and the light-emitting layer are at least partially located in the pixel opening. The pixel defining layer covers the gaps between adjacent first electrodes and the edges of the first electrodes so that the pixel opening exposes the first electrode; preferably, the third opening is located between the second opening and the pixel opening.

7. The display panel according to claim 1, wherein: The edge of the second electrode overlaps the isolation structure; Preferably, the isolation structure comprises a support portion and a crown portion, the crown portion is located on a side of the support portion away from the substrate, and an area of ​​an orthographic projection of an end of the support portion close to the crown portion on the substrate is smaller than an area of ​​an orthographic projection of the crown portion on the substrate; Preferably, the orthographic projection of one end of the support portion close to the crown portion on the substrate is located within the orthographic projection of the crown portion on the substrate; Preferably, the support portion is made of a conductive material, and an edge of the second electrode overlaps a side surface of the support portion.

8. The display panel according to claim 7, wherein: The support portion includes a first sub-support portion and a second sub-support portion, the first sub-support portion is located between the second sub-support portion and the substrate, the orthographic projection area of ​​the first sub-support portion on the substrate is larger than the orthographic projection area of ​​the second sub-support portion on the substrate, and 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, and the second electrode overlaps the first sub-support portion; Preferably, the second electrode is also overlapped with the second sub-support portion.

9. The display panel according to claim 1, wherein: The display panel further includes an encapsulation layer covering the second electrode and the isolation structure.

10. The display panel according to claim 2, wherein: The first openings include first-type openings, second-type openings and third-type openings, and the first-type openings, the second-type openings and the third-type openings are respectively used to accommodate the light-emitting units with different colors of emitted light.

11. A method for preparing a display panel, characterized in that: include: providing a substrate; forming a conductive structure on one side of the substrate; forming an isolation structure on a side of the conductive structure away from the substrate; A second electrode is formed on a side of the conductive structure away from the substrate, and the second electrode is electrically connected to the isolation structure through the conductive structure.

12. The method for preparing a display panel according to claim 11, wherein: The first electrode is formed while forming the conductive structure on one side of the substrate.

13. The method for preparing a display panel according to claim 12, wherein: The preparation method further comprises: forming a pixel definition layer on a side of the first electrode and the conductive structure away from the substrate; forming a second opening and a third opening on the pixel definition layer to expose the conductive structure; the isolation structure is electrically connected to the conductive structure through the second opening, and the second electrode is electrically connected to the conductive structure through the third opening; Preferably, the third opening is located between the second opening and the pixel opening; Preferably, the pixel opening is formed on the pixel defining layer by etching.

14. The method for preparing a display panel according to claim 13, wherein: A pixel opening is also formed on the pixel defining layer to expose the first electrode; Preferably, the isolation structure encloses a first opening, and the pixel opening is located within the first opening.

15. The method for preparing a display panel according to claim 14, wherein: The preparation method further comprises: A light emitting layer is formed on a side of the first electrode located in the pixel opening and away from the substrate, and the second electrode covers the light emitting layer.

16. The method for manufacturing a display panel according to claim 12, wherein: The forming of the first electrode while forming the conductive structure on one side of the substrate comprises: forming a first electrode layer on one side of the substrate; The first electrode layer is etched to form a first electrode and a conductive structure that are isolated from each other.

17. The method for preparing a display panel according to claim 13, wherein: The second opening and the third opening are formed on the pixel defining layer by etching.

18. The method for manufacturing a display panel according to claim 11, wherein: The isolation structure is formed on one side of the substrate, comprising: forming an isolation layer on one side of the substrate; The isolation layer is etched to form the isolation structure.

19. The method for preparing a display panel according to claim 11, wherein: The preparation method further comprises: A packaging layer is formed on a side of the second electrode and the isolation structure away from the substrate.

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

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