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 and a second electrode, the isolation structure is arranged on one side of the substrate, an isolation opening is defined by the isolation structure, the second electrode is located in the isolation opening, and the isolation structure comprises a first supporting part and a second supporting part; the second supporting part is located on the side, away from the substrate, of the first supporting part, the first supporting part is provided with a first side wall, the second electrode comprises a first lap joint part, the first lap joint part covers the first side wall, and the first lap joint part is continuously arranged between the end, close to the substrate, of the first side wall and the end, away from the substrate, of the first side wall. According to the display panel provided by the invention, the stability of electrical connection between the second electrode and the isolation structure is improved, poor connection between the second electrode and the isolation structure is avoided, the overlapping impedance is reduced, pixel dark spots are 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] an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate;

[0008] A second electrode is disposed in the isolation opening;

[0009] The first supporting portion has a first side wall, and the second electrode includes a first overlapping portion, which covers the first side wall and is continuously arranged between an end of the first side wall close to the substrate and an end of the first side wall far from the substrate.

[0010] In one embodiment, the second supporting portion has a first surface on a side close to the substrate, the first surface includes a first area and a second area, the orthographic projection of the first area on the substrate overlaps with the orthographic projection of one end of the first supporting portion close to the second supporting portion on the substrate, and the orthographic projection of the second area on the substrate does not overlap with the orthographic projection of one end of the first supporting portion close to the second supporting portion on the substrate;

[0011] Wherein, the second electrode further includes a second overlapping portion, and the second overlapping portion covers the second area;

[0012] Preferably, the second overlapping portion is continuously arranged between an end of the second region close to the first region and an end far from the first region;

[0013] Preferably, the first overlapping portion and the second overlapping portion are arranged continuously;

[0014] Preferably, the thickness of the first overlapping portion is greater than the thickness of the second overlapping portion.

[0015] In one embodiment, the display panel further includes a first electrode and a light-emitting layer, wherein the first electrode, the light-emitting layer and the second electrode are sequentially stacked in a direction away from the substrate, the light-emitting layer is located in the isolation opening, and the first electrode, the light-emitting layer and the second electrode constitute a light-emitting unit;

[0016] Preferably, the material of the second electrode comprises a metal mixture;

[0017] Preferably, the material of the second electrode comprises a magnesium-silver mixture, a magnesium-aluminum mixture or a silver-aluminum mixture;

[0018] Preferably, the second electrode is a film structure.

[0019] In one embodiment, the display panel further comprises a pixel defining layer, the pixel defining layer is located between the isolation structure and the substrate, the pixel defining layer defines a plurality of pixel openings respectively corresponding to the isolation openings, the pixel openings are connected to the corresponding isolation openings, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the corresponding isolation opening on the substrate, and at least a portion of the first electrode is exposed to the pixel opening;

[0020] Preferably, the pixel defining layer covers gaps between adjacent first electrodes and edges of the first electrodes, so that the pixel opening exposes the first electrodes.

[0021] In one embodiment, the first supporting portion includes a first sub-supporting portion and a second sub-supporting portion, the first sub-supporting portion is located between the second sub-supporting portion and the substrate, the orthographic projection area of ​​the first sub-supporting portion on the substrate is larger than the orthographic projection area of ​​the second sub-supporting portion on the substrate, and the orthographic projection of the second sub-supporting portion on the substrate is located within the orthographic projection of the first sub-supporting portion on the substrate, and the first sub-supporting portion and the second sub-supporting portion are both overlapped with the first overlapping portion;

[0022] Preferably, the first overlapping portion covers a surface of the first sub-support portion that is away from the substrate;

[0023] Preferably, the material of the second sub-support portion includes aluminum, and the material of the first sub-support portion includes molybdenum.

[0024] In one embodiment, the isolation openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings are respectively used to accommodate the light-emitting layers with different colors of emitted light.

[0025] In one embodiment, the display panel further includes a first encapsulation layer, and the first encapsulation layer covers the second electrode;

[0026] Preferably, a polarizing layer and / or a lithium fluoride layer is further provided between the second electrode and the first encapsulation layer.

[0027] Based on the same inventive concept, the present application also discloses a method for preparing a display panel, which comprises:

[0028] providing a substrate;

[0029] An isolation structure is formed on one side of the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a first support portion and a second support portion, the second support portion is located on a side of the first support portion away from the substrate, an orthographic projection of an end of the first support portion close to the second support portion on the substrate is located within an orthographic projection of the second support portion on the substrate, and the first support portion has a first side wall;

[0030] A second electrode is formed in the isolation opening. The second electrode includes a first overlapping portion. The first overlapping portion covers the first side wall and is continuously arranged between an end of the first side wall close to the substrate and an end of the first side wall away from the substrate.

[0031] In one embodiment, forming a second electrode in the isolation opening includes:

[0032] forming a second electrode in the isolation opening by physical vapor deposition;

[0033] Preferably, the step of forming the second electrode in the isolation opening by physical vapor deposition comprises: depositing a second overlapping portion of the second electrode on a first surface of the second supporting portion on a side close to the substrate, the second overlapping portion being continuously arranged with the first overlapping portion;

[0034] Preferably, the method for preparing the display panel further includes:

[0035] forming a first electrode on one side of the substrate;

[0036] A light-emitting layer is formed in the isolation opening, and the first electrode, the light-emitting layer and the second electrode are sequentially stacked in a direction away from the substrate to form a light-emitting unit;

[0037] Preferably, the light-emitting layer is formed by evaporation;

[0038] Preferably, the method for preparing the display panel further includes:

[0039] forming a first encapsulation layer on a side of the second electrode away from the substrate;

[0040] Preferably, a first encapsulation layer is formed on a side of the second electrode away from the substrate by chemical vapor deposition;

[0041] Preferably, after forming the second electrode in the isolation opening and before forming the first encapsulation layer on a side of the second electrode away from the substrate, the method further comprises:

[0042] forming a polarizing layer and / or a lithium fluoride layer on a side of the second electrode away from the substrate;

[0043] Preferably, a polarizing layer and / or a lithium fluoride layer is formed on a side of the second electrode away from the substrate by evaporation.

[0044] Based on the same inventive concept, the present application also discloses a display device, which includes the above-mentioned display panel.

[0045] Based on the same inventive concept, the present application also discloses a display panel, which includes:

[0046] substrate;

[0047] an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate;

[0048] A second electrode is disposed in the isolation opening;

[0049] The first supporting portion has a first side wall, the second electrode includes a first overlapping portion, and the first overlapping portion covers the first side wall and a surface of the second supporting portion close to the substrate.

[0050] Based on the same inventive concept, the present application also discloses a display panel, which includes:

[0051] substrate;

[0052] an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate;

[0053] A second electrode is disposed in the isolation opening;

[0054] The first supporting portion has a first side wall, the second electrode includes a first overlapping portion, the first overlapping portion covers the first side wall, and the material of the second electrode includes a metal mixture.

[0055] Compared with the prior art, the display panel provided by the present application improves the stability of the electrical connection between the second electrode and the isolation structure, avoids poor connection between the second electrode and the isolation structure, reduces the overlapping impedance, avoids the occurrence of pixel dark spots, and improves the display performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] 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.

[0057] Figure 1 is a schematic diagram of a related display panel;

[0058] Figure 2 is a schematic diagram of a hierarchical structure of a related display panel;

[0059] Figure 3 A schematic diagram of the layer structure of a display panel provided in an embodiment of the present application;

[0060] Figure 4 A partial structural schematic diagram of a display panel provided in an embodiment of the present application;

[0061] Figure 5 A schematic diagram of a layer structure of a display panel is provided for another embodiment of the present application;

[0062] Figure 6 A partial structural schematic diagram of a display panel provided in another embodiment of the present application;

[0063] Figure 7 A partial structural schematic diagram of a display panel provided in another embodiment of the present application;

[0064] Figure 8 A schematic diagram of a layer structure of a display panel is provided for another embodiment of the present application;

[0065] Fig. 9 A flow chart of a method for preparing a display panel is provided for another embodiment of the present application.

[0066] Marking Description:

[0067] 100, display panel; 200, evaporation source; 300, light emitting unit;

[0068] 1. Substrate;

[0069] 2. Isolation structure; 21. Isolation opening; 22. First support portion; 221. First side wall; 23. Second support portion; 231. First surface; 232. First region; 233. Second region; 24. First sub-support portion; 25. Second sub-support portion;

[0070] 3. second electrode; 31. first overlapping portion; 32. second overlapping portion;

[0071] 4. a first electrode;

[0072] 5. Luminescent layer;

[0073] 6. pixel definition layer; 61. pixel opening;

[0074] 7. The first encapsulation layer. DETAILED DESCRIPTION

[0075] 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.

[0076] 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.

[0077] Reference Figure 1-2 FIG. 1 is a schematic diagram of a structure of a related display panel, which includes a substrate 1 and an isolation structure 2 disposed on one side of the substrate 1. The isolation structure 2 encloses an isolation opening 21 for accommodating a light-emitting unit, and adjacent light-emitting units are separated by the isolation structure 2. The light-emitting unit includes a second electrode 3 located in the isolation opening 21, and the second electrode 3 overlaps the isolation structure 2.

[0078] Among them, an isolation structure 2 is set at the gap between the light-emitting units to separate the functional film layers of adjacent light-emitting units. In this way, in the evaporation process of multiple functional film layers, it is only necessary to perform whole-surface evaporation on the display panel 100, 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 can be designed to be smaller in size to increase the pixel density.

[0079] Among them, the overlapping effect between the second electrode 3 and the isolation structure 2 is poor, the overlapping impedance is high, and there is a risk of dark spots in pixels.

[0080] Based on this, the present application provides a display panel solution, as detailed in the following embodiments.

[0081] 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 and a second electrode 3. The isolation structure 2 is arranged on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 21. The second electrode 3 is arranged in the isolation openings 21.

[0082] The isolation structure 2 includes a first support portion 22 and a second support portion 23 . The second support portion 23 is located on a side of the first support portion 22 away from the substrate 1 . The orthographic projection of one end of the first support portion 22 close to the second support portion 23 on the substrate 1 is located within the orthographic projection of the second support portion 23 on the substrate 1 .

[0083] The first supporting portion 22 has a first side wall 221 , and the second electrode 3 includes a first overlapping portion 31 . The first overlapping portion 31 covers the first side wall 221 and is continuously disposed between an end of the first side wall 221 close to the substrate 1 and an end of the first side wall 221 away from the substrate 1 .

[0084] After long-term research, the inventors found that the second electrode 3 is usually a vapor deposition source 200 for full-surface vapor deposition, and is connected to the isolation structure 2 to achieve circuit conduction. Figure 2 However, in the actual preparation process, due to the existence of the evaporation angle of the evaporation source 200, the isolation structure 2 presents a structure that is larger at the top and smaller at the bottom, which will block the evaporation material during evaporation, resulting in a smaller overlap area between the second electrode 3 and the isolation structure 2, poor overlap effect, and the risk of dark pixels.

[0085] The display panel 100 provided in this embodiment improves the stability of the electrical connection between the second electrode 3 and the isolation structure 2, avoids poor connection between the second electrode 3 and the isolation structure 2, reduces the overlapping impedance, avoids the occurrence of pixel dark spots, and improves the display performance of the display panel 100 by covering the first side wall 221 with the first overlapping portion 31 in the second electrode 3 and continuously arranging it between the end of the first side wall 221 close to the substrate 1 and the end far from the substrate 1.

[0086] Optionally, the second electrode 3 is formed in the isolation opening 21 by physical vapor deposition. The long film property of physical vapor deposition can ensure that the second electrode 3 is deposited along the previous structure. Therefore, the second electrode 3 formed by physical vapor deposition can cover the entire first side wall 221.

[0087] It should be noted that the material of the second electrode 3 can be a metal material. The smaller the thickness of the second electrode 3, the higher its light transmittance, but the higher its resistivity. If the thickness of the second electrode 3 is too small, the voltage drop of the second electrode 3 (the common electrode in this case) will be too large when the isolation structure 2 is not provided. In this embodiment, the second electrode 3 is connected to the conductive isolation structure 2, and the thickness restriction of the second electrode 3 can be lifted, so that the second electrode 3 has a smaller thickness and has a higher light transmittance.

[0088] Preferably, the material of the second electrode 3 includes a metal mixture; for example, a magnesium-silver mixture, a magnesium-aluminum mixture, a silver-aluminum mixture, etc.

[0089] Preferably, the second electrode 3 is a film structure. Exemplarily, the material of the second electrode 3 includes a magnesium-silver mixture, and during preparation, two evaporation sources are used for simultaneous evaporation, one evaporation source evaporating magnesium and the other evaporating silver to form a second electrode 3 with a film structure.

[0090] Reference Figure 5-Figure 6 As shown, in one embodiment, the end of the second support portion 23 close to the substrate 1 has a first surface 231, the first surface 231 includes a first area 232 and a second area 233, the orthographic projection of the first area 232 on the substrate 1 overlaps with the orthographic projection of the end of the first support portion 22 close to the second support portion 23 on the substrate 1, and the orthographic projection of the second area 233 on the substrate 1 does not overlap with the orthographic projection of the end of the first support portion 22 close to the second support portion 23 on the substrate 1; wherein the second electrode 3 further includes a second overlapping portion 32, and the second overlapping portion 32 covers the second area 233. The overlapping area can be further increased to improve the electrical connection effect.

[0091] Specifically, the film growth characteristic of physical vapor deposition can ensure that the second electrode 3 is deposited along the first surface 231 , thereby being deposited in the second region 233 .

[0092] Furthermore, the thickness of the first overlapping portion 31 is greater than the thickness of the second overlapping portion 32. Since the deposition of the film in the second region 233 is more difficult, the thickness of the second overlapping portion 32 deposited in the second region 233 is less than the thickness of the first overlapping portion 31.

[0093] Preferably, the second overlapping portion 32 is continuously provided between one end of the second region 233 close to the first region 232 and one end far from the first region 232 , that is, the second region 233 is entirely covered by the second overlapping portion 32 , further improving the overlapping area and overlapping effect.

[0094] Please continue to refer to Figure 3 As shown, in one embodiment, the display panel 100 further includes a first electrode 4 and a light-emitting layer 5, the first electrode 4, the light-emitting layer 5 and the second electrode 3 are sequentially stacked in a direction away from the substrate 1, the light-emitting layer 5 is located in the isolation opening 21, and the first electrode 4, the light-emitting layer 5 and the second electrode 3 form a light-emitting unit 300. The light-emitting layer 5 is separated by the isolation structure 2, and different voltages are configured on the first electrode 4 and the second electrode 3 to form a voltage difference between the first electrode 4 and the second electrode 3, so as to drive the light-emitting layer 5 to emit light. Optionally, the first electrode 4 is an anode and the second electrode 3 is a cathode.

[0095] Please continue to refer to Figure 3As shown, in one embodiment, the display panel 100 also includes a pixel defining layer 6, which is located between the isolation structure 2 and the substrate 1. The pixel defining layer 6 is defined by a plurality of pixel openings 61 corresponding to the isolation openings 21 respectively. The pixel openings 61 are connected to the corresponding isolation openings 21. The orthographic projection of the pixel opening 61 on the substrate 1 is located within the orthographic projection of the corresponding isolation opening 21 on the substrate 1. At least a portion of the first electrode 4 is exposed to the pixel opening 61 so that a light-emitting layer connected to the first electrode 4 is prepared in the pixel opening 61.

[0096] Preferably, the pixel defining layer 6 covers the gaps between adjacent first electrodes 4 and the edges of the first electrodes 4, so that the pixel opening 61 exposes the first electrode 4. Thus, the first electrode 4 can have a larger design area without contacting the isolation structure 2, so that the light-emitting unit 300 has a larger effective light-emitting area.

[0097] The pixel defining layer 6 determines the shape and position of the light emitting unit 300 , and separates the first electrode 4 from the isolation structure 2 .

[0098] Please refer to Figure 7 As shown, in one embodiment, the first support portion 22 includes a first sub-support portion 24 and a second sub-support portion 25, the first sub-support portion 24 is located between the second sub-support portion 25 and the substrate 1, the orthographic projection area of ​​the first sub-support portion 24 on the substrate 1 is larger than the orthographic projection area of ​​the second sub-support portion 25 on the substrate 1, and the orthographic projection of the second sub-support portion 25 on the substrate 1 is located within the orthographic projection of the first sub-support portion 24 on the substrate 1, and the first sub-support portion 24 and the second sub-support portion 25 are both overlapped with the first overlap portion 31, which is conducive to increasing the overlap area between the second electrode 3 and the first support portion 22, and improving the stability of the electrical connection. Preferably, the material of the second sub-support portion 25 includes aluminum, etc., and the material of the first sub-support portion 24 includes molybdenum, etc., to ensure excellent conductive properties.

[0099] Preferably, the first overlapping portion 31 covers the surface of the first sub-support portion 24 which is away from the substrate 1 , which is beneficial to further improve the overlapping effect.

[0100] In one embodiment, the isolation opening 21 includes a first type of opening, a second type of opening, and a third type of opening, and the first type of opening, the second type of opening, and the third type of opening are respectively used to accommodate light-emitting layers 5 with different colors of emitted light, thereby improving the richness of the display of the display panel 100. Exemplarily, the light-emitting layers 5 of different colors include a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer. Or, the light-emitting layers 5 of different colors include any two of the red light-emitting layer, the green light-emitting layer, and the blue light-emitting layer.

[0101] Please refer to Figure 8As shown, in one embodiment, the display panel 100 further includes a first encapsulation layer 7 , and the first encapsulation layer 7 covers the second electrode 3 to protect the light emitting unit 300 .

[0102] In another embodiment, a polarizing layer and / or a lithium fluoride layer is further disposed between the second electrode 3 and the first encapsulation layer 7 to improve the light extraction effect and the display effect of the display panel 100 .

[0103] In one embodiment, the display panel 100 further includes a second encapsulation layer and a third encapsulation layer, wherein the second encapsulation layer covers the first encapsulation layer 7 and the isolation structure 2, and the third encapsulation layer covers the second encapsulation layer. The first encapsulation layer and the third encapsulation layer are inorganic layers, and 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 100, thereby realizing inorganic-organic-inorganic three-layer encapsulation.

[0104] Based on the same inventive concept, Fig. 9 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:

[0105] Step S10: providing a substrate 1.

[0106] Step S20, forming an isolation structure 2 on one side of the substrate 1, the isolation structure 2 encloses a plurality of isolation openings 21, the isolation structure 2 includes a first support portion 22 and a second support portion 23, the second support portion 23 is located on a side of the first support portion 22 away from the substrate 1, the orthographic projection of one end of the first support portion 22 close to the second support portion 23 on the substrate 1 is located within the orthographic projection of the second support portion 23 on the substrate 1, and the first support portion 22 has a first side wall 221.

[0107] Step S30 , forming a second electrode 3 in the isolation opening 21 , wherein the second electrode 3 comprises a first overlapping portion 31 , which covers the first side wall 221 and is continuously disposed between an end of the first side wall 221 close to the substrate 1 and an end of the first side wall 221 far from the substrate 1 .

[0108] The preparation method of the display panel provided in the present embodiment improves the stability of the electrical connection between the second electrode 3 and the isolation structure 2, avoids poor connection between the second electrode 3 and the isolation structure 2, reduces the overlapping impedance, avoids the occurrence of pixel dark spots, and improves the display performance of the display panel 100 by covering the first overlapping portion 31 in the second electrode 3 and continuously arranging it between the end of the first side wall 221 close to the substrate 1 and the end far from the substrate 1.

[0109] Optionally, step S30, forming the second electrode 3 in the isolation opening 21, includes:

[0110] The second electrode 3 is formed in the isolation opening 21 by physical vapor deposition. The long film property of physical vapor deposition can ensure that the second electrode 3 is deposited along the previous structure, so the second electrode 3 formed by physical vapor deposition can cover the entire first side wall 221.

[0111] Preferably, the step of forming the second electrode 3 in the isolation opening 21 by means of physical vapor deposition includes: depositing a second overlapping portion 32 of the second electrode 3 on the first surface 231 of the second support portion 23 on the side close to the substrate 1, and the second overlapping portion 32 is continuously arranged with the first overlapping portion 31 to further improve the overlapping area and overlapping effect.

[0112] Preferably, the method for preparing the display panel 100 further includes:

[0113] A first electrode 4 is formed on one side of the substrate 1;

[0114] A light-emitting layer 5 is formed in the isolation opening 21, and the first electrode 4, the light-emitting layer 5 and the second electrode 3 are sequentially stacked in a direction away from the substrate 1 to form a light-emitting unit 300; Figure 3 .

[0115] Preferably, the light-emitting layer 5 is formed by evaporation. It is only necessary to perform evaporation on the entire surface of the display panel 100, without using a mask plate to perform evaporation on the area where the light-emitting unit 300 is located to form a light-emitting film layer. Therefore, the process of evaporating the light-emitting layer 5 using the isolation structure 2 does not need to consider the alignment accuracy during evaporation, so that the gap between the light-emitting units 300 can be designed to be smaller in size to increase the pixel density.

[0116] Preferably, the method for preparing the display panel further comprises the following steps:

[0117] A first encapsulation layer 7 is formed on a side of the second electrode 3 away from the substrate 1 to protect the second electrode 3 .

[0118] Preferably, the first encapsulation layer 7 is formed on a side of the second electrode 3 away from the substrate 1 by chemical vapor deposition.

[0119] Preferably, step S30, after forming the second electrode 3 in the isolation opening 21 and before forming the first encapsulation layer 7 on the side of the second electrode 3 away from the substrate 1, further includes the following steps:

[0120] A polarizing layer and / or a lithium fluoride layer is formed on a side of the second electrode 3 away from the substrate 1 to improve the light extraction effect and the display effect of the display panel 100 .

[0121] Preferably, the polarizing layer and / or the lithium fluoride layer is formed on the side of the second electrode 3 away from the substrate 1 by evaporation.

[0122] Reference Figure 3-Figure 4 As shown, another embodiment of the present application discloses a display panel 100, which includes a substrate 1, an isolation structure 2 and a second electrode 3. The isolation structure 2 is arranged on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 21. The second electrode 3 is arranged in the isolation openings 21.

[0123] The isolation structure 2 includes a first support portion 22 and a second support portion 23 . The second support portion 23 is located on a side of the first support portion 22 away from the substrate 1 . The orthographic projection of one end of the first support portion 22 close to the second support portion 23 on the substrate 1 is located within the orthographic projection of the second support portion 23 on the substrate 1 .

[0124] The first supporting portion 22 has a first side wall 221 , and the second electrode 3 includes a first overlapping portion 31 . The first overlapping portion 31 covers the first side wall 22 and a surface of the second supporting portion 23 close to the substrate 1 .

[0125] Reference Figure 3-Figure 4 As shown, another embodiment of the present application discloses a display panel 100, which includes a substrate 1, an isolation structure 2 and a second electrode 3. The isolation structure 2 is arranged on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 21. The second electrode 3 is arranged in the isolation openings 21.

[0126] The isolation structure 2 includes a first support portion 22 and a second support portion 23 . The second support portion 23 is located on a side of the first support portion 22 away from the substrate 1 . The orthographic projection of one end of the first support portion 22 close to the second support portion 23 on the substrate 1 is located within the orthographic projection of the second support portion 23 on the substrate 1 .

[0127] The first support portion 22 has a first side wall 221, the second electrode 3 includes a first overlap portion 31, the first overlap portion 31 covers the first side wall 22, and the material of the second electrode 3 includes a metal mixture. The metal mixture can be a magnesium-silver mixture, a magnesium-aluminum mixture, a silver-aluminum mixture, etc.

[0128] 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.).

[0129] The display device in the present embodiment has a display panel 100, which improves the stability of the electrical connection between the second electrode 3 and the isolation structure 2, avoids poor connection between the second electrode 3 and the isolation structure 2, reduces the overlap impedance, avoids the occurrence of pixel dark spots, improves the display performance of the display panel 100, and thus improves the performance of the display device.

[0130] Patent applications CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN11799 8900A, CN117062489A, CN117580403A, CN116583135A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A record relevant technical solutions of the isolation structure 2, and their contents are incorporated into this application by reference for reference.

[0131] 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.

[0132] 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.

[0133] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate; A second electrode is disposed in the isolation opening; The first supporting portion has a first side wall, and the second electrode includes a first overlapping portion, which covers the first side wall and is continuously arranged between an end of the first side wall close to the substrate and an end of the first side wall far from the substrate.

2. The display panel according to claim 1, wherein: The second supporting portion has a first surface on a side close to the substrate, the first surface includes a first area and a second area, the orthographic projection of the first area on the substrate overlaps with the orthographic projection of one end of the first supporting portion close to the second supporting portion on the substrate, and the orthographic projection of the second area on the substrate does not overlap with the orthographic projection of one end of the first supporting portion close to the second supporting portion on the substrate; Wherein, the second electrode further includes a second overlapping portion, and the second overlapping portion covers the second area; Preferably, the second overlapping portion is continuously arranged between an end of the second region close to the first region and an end far from the first region; Preferably, the first overlapping portion and the second overlapping portion are arranged continuously; Preferably, the thickness of the first overlapping portion is greater than the thickness of the second overlapping portion.

3. The display panel according to claim 1, wherein: The display panel further includes a first electrode and a light-emitting layer, wherein the first electrode, the light-emitting layer and the second electrode are sequentially stacked in a direction away from the substrate, the light-emitting layer is located in the isolation opening, and the first electrode, the light-emitting layer and the second electrode constitute a light-emitting unit; Preferably, the material of the second electrode comprises a metal mixture; Preferably, the material of the second electrode comprises a magnesium-silver mixture, a magnesium-aluminum mixture or a silver-aluminum mixture; Preferably, the second electrode is a film structure.

4. The display panel according to claim 3, wherein: The display panel further includes a pixel defining layer, the pixel defining layer is located between the isolation structure and the substrate, the pixel defining layer defines a plurality of pixel openings respectively corresponding to the isolation openings, the pixel openings are connected to the corresponding isolation openings, the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate, and at least a portion of the first electrode is exposed to the pixel openings; Preferably, the pixel defining layer covers gaps between adjacent first electrodes and edges of the first electrodes, so that the pixel opening exposes the first electrodes.

5. The display panel according to claim 3, wherein: The first supporting portion includes a first sub-supporting portion and a second sub-supporting portion, the first sub-supporting portion is located between the second sub-supporting portion and the substrate, the orthographic projection area of ​​the first sub-supporting portion on the substrate is larger than the orthographic projection area of ​​the second sub-supporting portion on the substrate, and the orthographic projection of the second sub-supporting portion on the substrate is located within the orthographic projection of the first sub-supporting portion on the substrate, and the first sub-supporting portion and the second sub-supporting portion are both overlapped with the first overlapping portion; Preferably, the first overlapping portion covers a surface of the first sub-support portion that is away from the substrate; Preferably, the material of the second sub-support portion includes aluminum, and the material of the first sub-support portion includes molybdenum.

6. The display panel according to claim 3, wherein: The isolation openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings are respectively used to accommodate the light-emitting layers with different colors of emitted light.

7. The display panel according to claim 1, wherein: The display panel further includes a first encapsulation layer, wherein the first encapsulation layer covers the second electrode; Preferably, a polarizing layer and / or a lithium fluoride layer is further provided between the second electrode and the first encapsulation layer.

8. A method for preparing a display panel, characterized in that: include: providing a substrate; An isolation structure is formed on one side of the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a first support portion and a second support portion, the second support portion is located on a side of the first support portion away from the substrate, an orthographic projection of an end of the first support portion close to the second support portion on the substrate is located within an orthographic projection of the second support portion on the substrate, and the first support portion has a first side wall; A second electrode is formed in the isolation opening. The second electrode includes a first overlapping portion. The first overlapping portion covers the first side wall and is continuously arranged between an end of the first side wall close to the substrate and an end of the first side wall away from the substrate.

9. The method for preparing a display panel according to claim 8, wherein: The forming of the second electrode in the isolation opening comprises: forming a second electrode in the isolation opening by physical vapor deposition; Preferably, the step of forming the second electrode in the isolation opening by physical vapor deposition comprises: depositing a second overlapping portion of the second electrode on a first surface of the second supporting portion on a side close to the substrate, the second overlapping portion being continuously arranged with the first overlapping portion; Preferably, the method for preparing the display panel further includes: forming a first electrode on one side of the substrate; A light-emitting layer is formed in the isolation opening, and the first electrode, the light-emitting layer and the second electrode are sequentially stacked in a direction away from the substrate to form a light-emitting unit; Preferably, the light-emitting layer is formed by evaporation; Preferably, the method for preparing the display panel further includes: forming a first encapsulation layer on a side of the second electrode away from the substrate; Preferably, a first encapsulation layer is formed on a side of the second electrode away from the substrate by chemical vapor deposition; Preferably, after forming the second electrode in the isolation opening and before forming the first encapsulation layer on a side of the second electrode away from the substrate, the method further comprises: forming a polarizing layer and / or a lithium fluoride layer on a side of the second electrode away from the substrate; Preferably, a polarizing layer and / or a lithium fluoride layer is formed on a side of the second electrode away from the substrate by evaporation.

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

11. A display panel, characterized in that: include: substrate; an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate; A second electrode is disposed in the isolation opening; The first supporting portion has a first side wall, the second electrode includes a first overlapping portion, and the first overlapping portion covers the first side wall and a surface of the second supporting portion close to the substrate.

12. A display panel, characterized in that: include: substrate; an isolation structure, disposed on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first support portion and a second support portion, the second support portion being located on a side of the first support portion away from the substrate, and an orthographic projection of an end of the first support portion close to the second support portion on the substrate being located within an orthographic projection of the second support portion on the substrate; A second electrode is disposed in the isolation opening; The first supporting portion has a first side wall, the second electrode includes a first overlapping portion, the first overlapping portion covers the first side wall, and the material of the second electrode includes a metal mixture.

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