Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device, the display panel comprises a substrate and an isolation structure, the isolation structure is arranged on one side of the substrate, and the isolation structure is enclosed to form a plurality of isolation openings for accommodating light emitting units. The isolation structure in the display panel comprises the first supporting part and the second supporting part, the first surface is formed on the side, close to the substrate, of the second supporting part, the first surface comprises the target area, the roughness of the target area is smaller than or equal to 0.08 mu m, the target area can improve the film forming effect of the first packaging layer, and the display effect of the display panel is improved. The bonding effect between the first surface and the first packaging layer is improved, the situation that liquid medicine enters from the position between the second supporting part and the first packaging layer in the subsequent wet etching process, the first supporting part is corroded, the light-emitting unit is eroded, and pixel dark spots are caused is 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 packaging effect and display performance.

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

[0006] substrate;

[0007] An isolation structure, disposed on one side of the substrate, the isolation structure encloses a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprises a first supporting portion and a second supporting portion, the second supporting portion is located on a side of the first supporting portion away from the substrate;

[0008] Wherein, the side of the second supporting portion close to the substrate includes a first surface, and the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, and the roughness of the target area is less than or equal to 0.08 μm.

[0009] In one embodiment, the ratio of the area of ​​the target region to the area of ​​the first surface is greater than or equal to 0.5;

[0010] Preferably, the target area is located on a side of the first surface relatively close to the isolation opening;

[0011] Preferably, the entire area of ​​the first surface is the target area.

[0012] In one embodiment, the display panel further includes a first encapsulation layer, the first encapsulation layer covers at least one side of the light-emitting unit away from the substrate, and the first encapsulation layer is attached to the target area;

[0013] Preferably, the first encapsulation layer is also in contact with the side wall of the second supporting portion;

[0014] Preferably, the first encapsulation layer is also in contact with the side wall of the first supporting portion;

[0015] Preferably, the material of the second support portion includes titanium, molybdenum or indium tin oxide;

[0016] Preferably, the first encapsulation layer comprises an inorganic material.

[0017] In one embodiment, the display panel further includes a second encapsulation layer, and the second encapsulation layer is located on a side of the first encapsulation layer away from the substrate;

[0018] Preferably, the display panel further comprises a third encapsulation layer, and the third encapsulation layer is located on a side of the second encapsulation layer away from the substrate.

[0019] Preferably, the second encapsulation layer comprises an organic material, and / or the third encapsulation layer comprises an inorganic material.

[0020] In one embodiment, the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, and at least a portion of the light-emitting layer and the second electrode are located in the isolation opening.

[0021] 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 comprises a plurality of pixel openings respectively corresponding to the isolation openings, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate;

[0022] Preferably, the orthographic projection of the pixel defining layer on the substrate covers the orthographic projection of the gap between adjacent first electrodes on the substrate;

[0023] Preferably, an orthographic projection of the pixel defining layer on the substrate overlaps with an orthographic projection of a portion of the first electrode on the substrate.

[0024] In one embodiment, the first 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;

[0025] Preferably, the second electrode overlaps the first sub-support portion;

[0026] Preferably, the second electrode is also overlapped with the second sub-support portion;

[0027] Preferably, the material of the first sub-support portion includes molybdenum, and the material of the second sub-support portion includes aluminum.

[0028] In one embodiment, the isolation openings include a first type of openings, a second type of openings and a third type of openings, and the first type of openings, the second type of openings and the third type of openings respectively define the light-emitting units with different colors of emitted light.

[0029] Preferably, the roughness of the target area is less than or equal to 0.05 μm.

[0030] Based on the same inventive concept, the present application also discloses another display panel, including:

[0031] substrate;

[0032] An isolation structure, disposed on one side of the substrate, the isolation structure encloses a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprises a first supporting portion and a second supporting portion, the second supporting portion is located on a side of the first supporting portion away from the substrate;

[0033] Among them, the side of the second supporting portion close to the substrate includes a first surface, and the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, the entire area of ​​the first surface is the target area, and the roughness of the target area is less than or equal to 0.08μm.

[0034] Based on the same inventive concept, the present application also discloses a method for preparing a display panel, which comprises:

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

[0036] forming a second supporting layer on a side of the first supporting layer away from the substrate;

[0037] Patterning the second supporting layer to form a second supporting portion;

[0038] The first supporting layer is patterned to form a first supporting portion, the side of the second supporting portion close to the substrate includes a first surface, the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, and the roughness of the target area is less than or equal to 0.08μm.

[0039] In one embodiment, the first supporting portion and the second supporting portion form an isolation structure, and the isolation structure encloses a plurality of isolation openings for accommodating the light-emitting unit;

[0040] The method for preparing the display panel further includes:

[0041] forming a first encapsulation layer on a side of the light-emitting unit away from the substrate, wherein the first encapsulation layer is attached to the target area;

[0042] Preferably, the method for preparing the display panel further includes:

[0043] forming a second encapsulation layer on a side of the first encapsulation layer away from the substrate;

[0044] Preferably, the method for preparing the display panel further includes:

[0045] A third encapsulation layer is formed on a side of the first encapsulation layer away from the substrate.

[0046] In one embodiment, the preparation method further comprises:

[0047] A pixel defining layer is formed on one side of the substrate, the pixel defining layer is located between the substrate and the isolation structure, the pixel defining layer includes a plurality of pixel openings corresponding to the isolation openings respectively, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate.

[0048] In one embodiment, patterning the second supporting layer includes:

[0049] Patterning the second supporting layer by dry etching;

[0050] Preferably, patterning the first supporting layer includes:

[0051] The first supporting layer is patterned by dry etching.

[0052] In one embodiment, the target area is formed on the first surface by reducing the overetching amount during etching.

[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 isolation structure in the display panel provided by the present application includes a first supporting part and a second supporting part. The second supporting part is formed with a first surface on a side close to the substrate. The first surface includes a target area. The roughness of the target area is less than or equal to 0.08 μm. The target area can improve the film-forming effect of the first encapsulation layer and the bonding effect between the first surface and the first encapsulation layer, thereby preventing the liquid from entering from between the second supporting part and the first encapsulation layer during subsequent wet etching, causing the first supporting part to corrode and erode the light-emitting unit, resulting in dark spots in the pixels, 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 A schematic diagram of an isolation structure of a display panel provided in an embodiment of the present application;

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

[0061] Figure 6 A schematic diagram of the layer structure of a display panel provided in another embodiment of the present application;

[0062] Figure 7 A schematic diagram of an isolation structure of a display panel provided in another embodiment of the present application;

[0063] Figure 8 A flow chart of a method for preparing a display panel is provided for another embodiment of the present application;

[0064] Figures 9a to 9c is a schematic diagram of a method for preparing a display panel in another embodiment of the present application;

[0065] Fig.10 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;

[0068] 1. Substrate;

[0069] 2. Isolation structure; 21. Isolation opening; 22. Burr;

[0070] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting layer; 33. Second electrode;

[0071] 4. The first encapsulation layer;

[0072] 5. first support portion; 51. first sub-support portion; 52. second sub-support portion; 53. overlapping step;

[0073] 6. second supporting portion; 61. first surface;

[0074] 7. Pixel definition layer; 71. Pixel opening;

[0075] 8. The first supporting layer;

[0076] 9. The second supporting layer. DETAILED DESCRIPTION

[0077] 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.

[0078] 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.

[0079] Patent CN118251982A, Patent 202410864269.8, Patent PCT / CN2024 / 098407, Patent PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, Patent PCT / CN2024 / 099072, Patent CN117979755A, Patent CN117998900A, Patent CN1 17062489A, patent CN117580403A, patent CN116583155A, patent CN116669477A, ​​patent CN117396039A, patent CN116669480A, patent CN116600606A, and patent CN117500332A record related technical solutions of isolation structure (or partition structure or isolation column) and packaging layer, and their contents are incorporated into this application by reference for reference.

[0080] 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 isolation opening 21 for accommodating the light-emitting unit 3, and adjacent light-emitting units 3 are separated by the isolation structure 2.

[0081] 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.

[0082] In the process of implementing the present invention, the inventors found that the following problems exist in the related technology: during wet etching in the process preparation, the chemical solution can easily enter from between the isolation structure 2 and the first packaging layer 4, causing the isolation structure 2 to corrode and erode the light-emitting material of the current color light-emitting unit 3, resulting in dark spots in the pixels.

[0083] Based on this, the present application provides a display panel solution, as detailed in the following embodiments.

[0084] Reference Figure 3-4 As shown, an embodiment of the present application discloses a display panel 100, which includes a substrate 1 and an isolation structure 2. The isolation structure 2 is arranged on one side of the substrate 1, and the isolation structure 2 encloses a plurality of isolation openings 21 for accommodating the light-emitting unit 3. The isolation structure 2 includes a first supporting portion 5 and a second supporting portion 6. The second supporting portion 6 is located on a side of the first supporting portion 5 away from the substrate 1.

[0085] Among them, the side of the second support portion 6 close to the substrate 1 includes a first surface 61, and the orthographic projection of the first surface 61 on the substrate 1 has no overlap with the orthographic projection of the side of the first support portion 5 close to the second support portion 6 on the substrate 1; the first surface includes a target area, and the roughness of the target area is less than or equal to 0.08μm.

[0086] Among them, the orthographic projection of the first surface 61 on the substrate 1 does not overlap with the orthographic projection of the side of the first support portion 5 close to the second support portion 6 on the substrate 1, so that the isolation structure 2 forms a structure that is larger at the top and smaller at the bottom, which can better block the light-emitting layer of the adjacent light-emitting unit 3 to reduce the current crosstalk problem of the adjacent light-emitting unit 3.

[0087] The isolation structure 2 in the display panel 100 provided in this embodiment includes a first supporting portion 5 and a second supporting portion 6. The second supporting portion 6 is formed with a first surface 61 on a side close to the substrate 1. The first surface 61 includes a target area. The roughness of the target area is less than or equal to 0.08 μm. The target area is relatively smooth, which can improve the film-forming effect of the first encapsulation layer and the bonding effect between the first surface 61 and the first encapsulation layer, thereby preventing the drug solution from entering from between the second supporting portion 6 and the first encapsulation layer during subsequent wet etching, causing the first supporting portion 5 to corrode and erode the light-emitting unit 3, resulting in dark spots in the pixels, thereby improving the display performance of the display panel 100.

[0088] Preferably, the isolation structure 2 is formed by etching, and during etching, the roughness of the target area is made less than or equal to 0.08 μm by reducing the overetching amount. The overetching amount is the amount by which the actual etching exceeds the predetermined size or range during the processing. Under the condition that other conditions remain unchanged, the lower the overetching amount, the smoother the formed surface.

[0089] Exemplarily, the roughness of the target area may be 0.08 μm, 0.075 μm, 0.07 μm, 0.065 μm, 0.06 μm, 0.055 μm, etc. Further, the roughness of the target area is less than or equal to 0.05 μm, such as 0.05 μm, 0.045 μm, 0.04 μm, 0.035 μm, 0.03 μm, 0.025 μm, 0.02 μm, 0.01 μm, etc.

[0090] Preferably, the material of the second supporting portion 6 includes titanium, molybdenum or indium tin oxide.

[0091] In one embodiment, the isolation opening 21 includes a first type of opening, a second type of opening, and a third type of opening, and the first type of opening, the second type of opening, and the third type of opening respectively define light-emitting units 3 with different colors of emitted light, thereby improving the richness of the display of the display panel 100. Exemplarily, the light-emitting units of different colors include light-emitting unit R, light-emitting unit B, and light-emitting unit 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.

[0092] Reference Figure 5 As shown, in one embodiment, the display panel 100 further includes a first encapsulation layer 4, the first encapsulation layer 4 at least covers the side of the light-emitting unit 3 away from the substrate 1, the first encapsulation layer 4 is laminated to the target area, and the first encapsulation layer 4 is used to protect the isolation structure 2 and the light-emitting unit 3. The first encapsulation layer 4 is laminated to the target area, which can ensure the film-forming effect of the first encapsulation layer 4 on the first surface 61, thereby improving the lamination effect with the second support portion 6.

[0093] Preferably, the ratio of the area of ​​the target region to the area of ​​the first surface 61 is greater than or equal to 0.5, and specifically, the ratio of the area of ​​the target region to the area of ​​the first surface 61 may be 0.5, 0.6, 0.7, 0.8, 0.9 or 1. With this arrangement, the film-forming effect of the first encapsulation layer 4 on the first surface 61 can be further ensured.

[0094] Preferably, the target area is located on a side of the first surface 61 relatively close to the isolation opening 21. This arrangement can effectively prevent the drug solution from entering between the second support portion 6 and the first packaging layer, causing the first support portion 5 to corrode and erode the light-emitting unit 3, resulting in dark pixels.

[0095] Preferably, the entire area of ​​the first surface 61 is the target area, ensuring that the first packaging layer 4 and the second support portion 6 have sufficient bonding area, thereby improving the packaging effect.

[0096] Preferably, the first packaging layer 4 is also in contact with the side wall of the second supporting portion 6, which is beneficial to increase the contact area between the first packaging layer 4 and the second supporting portion 6, thereby improving the packaging effect.

[0097] Preferably, the first packaging layer 4 is also in contact with the side wall of the first support portion 5, which is beneficial to protecting the first support portion 5 and further improving the packaging effect.

[0098] Preferably, the first encapsulation layer 4 is an inorganic layer, which has high density to isolate water and oxygen.

[0099] In another embodiment, the display panel 100 further includes a second encapsulation layer, and the second encapsulation layer is located on a side of the first encapsulation layer 4 away from the substrate 1 , which is beneficial to improving the encapsulation effect.

[0100] Furthermore, the display panel 100 further includes a third encapsulation layer, which is located on a side of the second encapsulation layer away from the substrate 1. Preferably, the second encapsulation layer includes an organic layer, so as to have a greater thickness to flatten the surface of the display panel, and the third encapsulation layer includes an inorganic layer, so as to realize inorganic-organic-inorganic three-layer encapsulation.

[0101] Please continue to refer to Figure 3 As shown, in one embodiment, the light-emitting unit 3 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1, and at least part of the light-emitting layer 32 and the second electrode 33 are located in the isolation opening 21. In a specific embodiment, the first electrode 31 is an anode, and the second electrode 33 is a cathode. Different voltages are configured on the first electrode 31 and the second electrode 33 to form a voltage difference between the first electrode 31 and the second electrode 33, so as to drive the light-emitting layer 32 to emit light.

[0102] Please continue to refer to Figure 3 As shown, in one embodiment, the display panel 100 further includes a pixel defining layer 7, the pixel defining layer 7 is located between the isolation structure 2 and the substrate 1, the pixel defining layer 7 includes a plurality of pixel openings 71 corresponding to the isolation openings 21, and the orthographic projections of the pixel openings 71 on the substrate 1 are located within the orthographic projections of the corresponding isolation openings 21 on the substrate 1. Optionally, the orthographic projection of the pixel defining layer 7 on the substrate 1 covers the orthographic projections of the gaps between adjacent first electrodes 31 on the substrate 1.

[0103] The pixel defining layer 7 determines the shape and position of the light emitting unit 3 and isolates the first electrode 31 from the isolation structure 2. Thus, the first electrode 31 can have a larger design area without contacting the isolation structure 2, so that the light emitting unit 3 has a larger effective light emitting area.

[0104] Preferably, the orthographic projection of the pixel defining layer 7 on the substrate 1 overlaps with the orthographic projection of a portion of the first electrode 31 on the substrate 1 .

[0105] Please refer to Figure 6 and 7As shown, in one embodiment, the first support portion 5 includes a first sub-support portion 51 and a second sub-support portion 52, the first sub-support portion 51 is located between the second sub-support portion 52 and the substrate 1, the orthographic projection area of ​​the first sub-support portion 51 on the substrate 1 is larger than the orthographic projection area of ​​the second sub-support portion 52 on the substrate 1, and the orthographic projection of the second sub-support portion 52 on the substrate 1 is located within the orthographic projection of the first sub-support portion 51 on the substrate 1, which is beneficial to ensure the stability of the electrical connection between the second electrode 33 and the first support portion 5.

[0106] Preferably, the second electrode 33 overlaps the first sub-support portion 51 , which helps to ensure the stability of the electrical connection between the second electrode 33 and the first support portion 5 .

[0107] Preferably, the second electrode 33 is also overlapped with the second sub-support portion 52 , which is beneficial to increase the overlap area between the second electrode 33 and the first support portion 5 , and improve the electrical connection effect between the second electrode 33 and the first support portion 5 .

[0108] Preferably, the material of the second sub-support portion 52 includes aluminum, etc., and the material of the first sub-support portion 51 includes molybdenum, etc., which can ensure good conductivity. The second electrode 33 of the light-emitting unit 3 is connected in series through the first support portion 5, so that the first support portion 5 and the second electrode 33 of the light-emitting unit 3 constitute a common electrode for easy driving.

[0109] Based on the same inventive concept, another embodiment of the present application discloses another display panel, including: a substrate and an isolation structure, the isolation structure is arranged on one side of the substrate, the isolation structure encloses a plurality of isolation openings for accommodating light-emitting units, the isolation structure includes 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; wherein the side of the second support portion close to the substrate includes a first surface, the orthographic projection of the first surface on the substrate and the orthographic projection of the side of the first support portion close to the second support portion on the substrate do not overlap; the first surface includes a target area, the entire area of ​​the first surface is the target area, and the roughness of the target area is less than or equal to 0.08μm. Specifically, the roughness of the target area can be 0.01μm, 0.02μm, 0.03μm, 0.04μm, 0.05μm, 0.06μm, 0.07μm or 0.08μm.

[0110] It is understandable that the display panel of the present application may also include a touch layer, a filter layer, an organic glue layer, a cover plate, etc.

[0111] Based on the same inventive concept, Figure 8 As shown, another embodiment of the present application discloses a method for preparing a display panel 100, which includes the following steps:

[0112] Step S10 , forming a first supporting layer 8 on one side of the substrate 1 .

[0113] Step S20, forming a second supporting layer 9 on a side of the first supporting layer 8 away from the substrate 1; Figure 9a .

[0114] Step S30, patterning the second support layer 9 to form a second support portion 6; Figure 9b Preferably, the second supporting layer 9 is patterned by dry etching.

[0115] Step S40, patterning the first support layer 8 to form a first support portion 5, and including a first surface 61 on the side of the second support portion 6 close to the substrate 1, wherein the orthographic projection of the first surface 61 on the substrate 1 does not overlap with the orthographic projection of the side of the first support portion 5 close to the second support portion 6 on the substrate 1; the first surface 61 includes a target area, and the roughness of the target area is less than or equal to 0.08 μm; Figure 9b Preferably, the first supporting layer 8 is patterned by dry etching.

[0116] Preferably, the isolation structure 2 is formed by etching, and during etching, the roughness of the target area is made less than or equal to 0.08 μm by reducing the overetching amount. The overetching amount is the amount by which the actual etching exceeds the predetermined size or range during the processing. Under the condition that other conditions remain unchanged, the lower the overetching amount, the smoother the formed surface.

[0117] Exemplarily, the roughness of the target area is 0.08 μm, 0.075 μm, 0.07 μm, 0.065 μm, 0.06 μm, 0.055 μm, etc. Further, the roughness of the target area is less than or equal to 0.05 μm, such as 0.05 μm, 0.045 μm, 0.04 μm, 0.035 μm, 0.03 μm, 0.025 μm, 0.02 μm, 0.01 μm, etc.

[0118] The first support portion 5 and the second support portion 6 form an isolation structure 2, and the isolation structure 2 encloses and forms a plurality of isolation openings 21 for accommodating the light-emitting unit 3. Figure 3 .

[0119] The manufacturing method of the display panel provided in this embodiment comprises an isolation structure 2 including a first supporting portion 5 and a second supporting portion 6. A first surface 61 is formed on a side of the second supporting portion 6 close to the substrate 1. The first surface 61 comprises a target area. The roughness of the target area is less than or equal to 0.08 μm. The target area can improve the film-forming effect of the first encapsulation layer and the bonding effect between the first surface 61 and the first encapsulation layer, thereby preventing the drug solution from entering from between the second supporting portion 6 and the first encapsulation layer during subsequent wet etching, causing the first supporting portion 5 to corrode and erode the light-emitting unit 3, thereby causing dark spots in the pixels, thereby improving the display performance of the display panel 100.

[0120] Ginseng Fig.10 As shown, in one embodiment, the method for preparing the display panel 100 further includes the following steps:

[0121] Step S50, forming a first encapsulation layer 4 on the side of the light-emitting unit 3 away from the substrate 1, and the first encapsulation layer 4 is laminated to the target area. The first encapsulation layer 4 is used to protect the isolation structure 2 and the light-emitting unit 3. The first encapsulation layer 4 is laminated to the target area, which can ensure the film-forming effect of the first encapsulation layer 4 on the first surface 61, thereby improving the lamination effect with the second support portion 6.

[0122] Preferably, the first encapsulation layer 4 is an inorganic layer.

[0123] Preferably, the method for preparing the display panel further comprises the following steps:

[0124] forming a second encapsulation layer on a side of the first encapsulation layer 4 away from the substrate 1;

[0125] Preferably, the method for preparing the display panel further comprises the following steps:

[0126] A third encapsulation layer is formed on a side of the first encapsulation layer 4 away from the substrate 1 .

[0127] Preferably, the second encapsulation layer is an organic layer, so as to have a greater thickness to planarize the surface of the display panel, and the third encapsulation layer is an inorganic layer, so as to realize inorganic-organic-inorganic three-layer encapsulation.

[0128] In another embodiment, the method for preparing a display panel further includes the following steps:

[0129] A pixel defining layer 7 is formed on one side of the substrate 1. The pixel defining layer 7 is located between the substrate 1 and the isolation structure 2. The pixel defining layer 7 includes a plurality of pixel openings 71 corresponding to the isolation openings 21 respectively. The orthographic projection of the pixel opening 71 on the substrate is located within the orthographic projection of the corresponding isolation opening 21 on the substrate. Figure 3 .

[0130] The specific structure and materials of the display panel 100 prepared in the display panel preparation method of this embodiment refer to the above-mentioned display panel embodiment, and will not be described again here.

[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 of the present embodiment, the isolation structure 2 in the display panel 100 includes a first supporting portion 5 and a second supporting portion 6. The second supporting portion 6 includes a first surface 61 on a side close to the substrate 1. The first surface 61 includes a target area. The roughness of the target area is less than or equal to 0.08 μm. The target area can improve the film-forming effect of the first encapsulation layer and the bonding effect between the first surface 61 and the first encapsulation layer, thereby preventing the drug solution from entering from between the second supporting portion 6 and the first encapsulation layer during subsequent wet etching, causing the first supporting portion 5 to corrode and erode the light-emitting unit 3, resulting in dark spots in the pixels, thereby improving the display performance of the display panel 100 and thus improving the performance of the display device.

[0133] 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.

[0134] 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.

[0135] 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 encloses a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprises a first supporting portion and a second supporting portion, the second supporting portion is located on a side of the first supporting portion away from the substrate; Wherein, the side of the second supporting portion close to the substrate includes a first surface, and the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, and the roughness of the target area is less than or equal to 0.08 μm.

2. The display panel according to claim 1, wherein: The ratio of the area of ​​the target region to the area of ​​the first surface is greater than or equal to 0.5; Preferably, the target area is located on a side of the first surface relatively close to the isolation opening; Preferably, the entire area of ​​the first surface is the target area.

3. The display panel according to claim 1 or 2, characterized in that: The display panel further includes a first encapsulation layer, the first encapsulation layer at least covers a side of the light-emitting unit away from the substrate, and the first encapsulation layer is attached to the target area; Preferably, the first encapsulation layer is also in contact with the side wall of the second supporting portion; Preferably, the first encapsulation layer is also in contact with the side wall of the first supporting portion; Preferably, the material of the second support portion includes titanium, molybdenum or indium tin oxide; Preferably, the first encapsulation layer comprises an inorganic material.

4. The display panel according to claim 3, wherein: The display panel further comprises a second encapsulation layer, wherein the second encapsulation layer is located on a side of the first encapsulation layer away from the substrate; Preferably, the display panel further comprises a third encapsulation layer, and the third encapsulation layer is located on a side of the second encapsulation layer away from the substrate; Preferably, the second encapsulation layer comprises an organic material, and / or the third encapsulation layer comprises an inorganic material.

5. The display panel according to claim 1, wherein: The light-emitting unit comprises a first electrode, a light-emitting layer, and a second electrode which are sequentially stacked in a direction away from the substrate, and at least a portion of the light-emitting layer and the second electrode are located in the isolation opening.

6. The display panel according to claim 5, wherein: The display panel further comprises a pixel defining layer, the pixel defining layer being located between the isolation structure and the substrate, the pixel defining layer comprising a plurality of pixel openings respectively corresponding to the isolation openings, and the orthographic projections of the pixel openings on the substrate being located within the orthographic projections of the corresponding isolation openings on the substrate; Preferably, the orthographic projection of the pixel defining layer on the substrate covers the orthographic projection of the gap between adjacent first electrodes on the substrate; Preferably, an orthographic projection of the pixel defining layer on the substrate overlaps with an orthographic projection of a portion of the first electrode on the substrate.

7. The display panel according to claim 6, 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; Preferably, the second electrode overlaps the first sub-support portion; Preferably, the second electrode is also overlapped with the second sub-support portion; Preferably, the material of the first sub-support portion includes molybdenum, and the material of the second sub-support portion includes aluminum.

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

9. The display panel according to claim 1, wherein: The roughness of the target area is less than or equal to 0.05 μm.

10. A display panel, characterized in that: include: substrate; An isolation structure, disposed on one side of the substrate, the isolation structure encloses a plurality of isolation openings for accommodating light-emitting units, the isolation structure comprises a first supporting portion and a second supporting portion, the second supporting portion is located on a side of the first supporting portion away from the substrate; Among them, the side of the second supporting portion close to the substrate includes a first surface, and the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, the entire area of ​​the first surface is the target area, and the roughness of the target area is less than or equal to 0.08μm.

11. A method for preparing a display panel, characterized in that: include: forming a first supporting layer on one side of the substrate; forming a second supporting layer on a side of the first supporting layer away from the substrate; Patterning the second supporting layer to form a second supporting portion; The first supporting layer is patterned to form a first supporting portion, the side of the second supporting portion close to the substrate includes a first surface, the orthographic projection of the first surface on the substrate has no overlap with the orthographic projection of the side of the first supporting portion close to the second supporting portion on the substrate; the first surface includes a target area, and the roughness of the target area is less than or equal to 0.08μm.

12. The method for preparing a display panel according to claim 11, wherein: The first supporting portion and the second supporting portion form an isolation structure, and the isolation structure encloses a plurality of isolation openings for accommodating the light-emitting unit; The method for preparing the display panel further includes: forming a first encapsulation layer on a side of the light-emitting unit away from the substrate, wherein the first encapsulation layer is attached to the target area; Preferably, the method for preparing the display panel further includes: forming a second encapsulation layer on a side of the first encapsulation layer away from the substrate; Preferably, the method for preparing the display panel further includes: forming a third encapsulation layer on a side of the second encapsulation layer away from the substrate; Preferably, the preparation method further comprises: A pixel defining layer is formed on one side of the substrate, the pixel defining layer is located between the substrate and the isolation structure, the pixel defining layer includes a plurality of pixel openings corresponding to the isolation openings respectively, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the corresponding isolation openings on the substrate.

13. The method for preparing a display panel according to claim 11, wherein: The step of patterning the second supporting layer comprises: Patterning the second supporting layer by dry etching; Preferably, patterning the first supporting layer includes: The first supporting layer is patterned by dry etching.

14. The method for manufacturing a display panel according to claim 11, wherein: The target area is formed on the first surface by reducing the overetching amount during etching.

15. 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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