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, an isolation structure and a plurality of light-emitting units, the isolation structure is arranged on the substrate and forms a plurality of isolation openings in a surrounding mode, the isolation openings comprise the first isolation openings and the second isolation openings, a supporting part of the isolation structure comprises a first main body part and a plurality of first protruding parts, the first protruding parts are arranged at intervals, and the second protruding parts are arranged at intervals. The second isolation opening protrudes out of the first main body part; the light-emitting units comprise first light-emitting units and second light-emitting units different from the first light-emitting units in light emitting color, at least part of the first light-emitting units are located in the first isolation openings, and at least part of the second light-emitting units are located in the second isolation openings. By arranging the first protruding part, the contact area between the side wall surface of the supporting part and the etching liquid is increased, so that the contact volume between the side wall surface and the liquid medicine is reduced, and the side etching amount of the side wall surface, corresponding to the second isolation opening, of the supporting part is reduced.

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] The development of semiconductor technology plays a vital role in the progress of the electronics industry. Organic Light-Emitting Diode (OLED) has attracted great attention and has been widely used in electronic display products due to its advantages such as simple preparation process, low cost, low power consumption, high brightness, wide viewing angle, high contrast and flexible display.

[0003] However, the process 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 propose a display panel and a manufacturing method thereof, and a display device, aiming to improve the process performance of the display panel.

[0005] To achieve the above object, the present disclosure provides a display panel, the display panel comprising:

[0006] substrate;

[0007] An isolation structure is disposed on the substrate, the isolation structure includes a support portion, the isolation structure encloses a plurality of isolation openings, the plurality of isolation openings include a first isolation opening and a second isolation opening, the support portion includes a first main body portion and a plurality of first protrusions, the plurality of first protrusions are arranged at intervals and protrude from the first main body portion toward the second isolation opening;

[0008] A plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, wherein at least a portion of the first light-emitting unit is located in the first isolation opening, and at least a portion of the second light-emitting unit is located in the second isolation opening, and a light-emitting color of the first light-emitting unit is different from a light-emitting color of the second light-emitting unit.

[0009] In one embodiment, the plurality of first protrusions are spaced around the corresponding second isolation openings;

[0010] Preferably, the first protrusion extends along a first direction passing through a plane where the substrate is located, and has a first end close to the substrate and a second end away from the substrate.

[0011] In one embodiment, the plurality of isolation openings further include a third isolation opening, the support portion further includes a plurality of second protrusions, and the plurality of light emitting units further include a third light emitting unit, wherein:

[0012] The plurality of second protrusions are arranged at intervals and protrude from the first main body toward the third isolation opening;

[0013] At least a portion of the third light-emitting unit is located in the third isolation opening, and the light-emitting colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different from each other;

[0014] Preferably, the arrangement density of the plurality of second protrusions is greater than the arrangement density of the plurality of first protrusions;

[0015] Preferably, the plurality of second protrusions are arranged at intervals around the corresponding third isolation openings;

[0016] Preferably, the second protrusion extends along a first direction passing through a plane where the substrate is located, and has a third end portion close to the substrate and a fourth end portion away from the substrate.

[0017] In one embodiment, the length of the first protrusion protruding from the first main body toward the second isolation opening is less than the length of the second protrusion protruding from the first main body toward the third isolation opening;

[0018] Preferably, a gap between two adjacent first protrusions is larger than a gap between two adjacent second protrusions.

[0019] In one embodiment, the isolation structure further comprises a crown portion, the crown portion is located on a side of the support portion facing away from the substrate, and the orthographic projection of the support portion on the substrate is located within the orthographic projection range of the crown portion on the substrate;

[0020] Preferably, the crown protrudes toward the first isolation opening by a first length of the support portion, the crown protrudes toward the second isolation opening by a second length of the support portion, and the crown protrudes toward the third isolation opening by a third length of the support portion, wherein:

[0021] The first length is equal to the second length, and / or the first length is equal to the third length, and / or the second length is equal to the third length;

[0022] Preferably, the crown portion includes a second main body portion, a plurality of third protrusions and a plurality of fourth protrusions, wherein the plurality of third protrusions are arranged at intervals and protrude from the second main body portion toward the second isolation opening, and the plurality of fourth protrusions are arranged at intervals and protrude from the second main body portion toward the third isolation opening;

[0023] Preferably, a length of the third protrusion protruding from the second main body toward the second isolation opening is smaller than a length of the fourth protrusion protruding from the second main body toward the third isolation opening;

[0024] Preferably, the length of the first protrusion protruding from the first main body toward the second isolation opening is smaller than the length of the third protrusion protruding from the second main body toward the second isolation opening;

[0025] Preferably, the length of the second protrusion protruding from the first main body toward the third isolation opening is smaller than the length of the fourth protrusion protruding from the second main body toward the third isolation opening;

[0026] Preferably, the gap between two adjacent third protrusions is larger than the gap between two adjacent fourth protrusions.

[0027] In one embodiment, the length of the first protrusion protruding from the first main body toward the second isolation opening is less than the second length; and / or,

[0028] A length of the second protrusion protruding toward the third isolation opening from the first main body is less than the third length.

[0029] In one embodiment, the material of the isolation structure includes a conductive material;

[0030] Preferably, the material of the support portion includes a conductive material;

[0031] Preferably, the material of the crown comprises titanium, and / or the material of the support comprises aluminum.

[0032] In one embodiment, the light-emitting unit includes a lower electrode, a light-emitting functional layer, and an upper electrode which are sequentially stacked in a direction away from the substrate, and the upper electrode is electrically connected to the isolation structure.

[0033] In one embodiment, it further comprises:

[0034] A pixel defining layer, located on one side of the substrate, the pixel defining layer encloses a plurality of pixel openings, and the pixel openings are connected to the corresponding isolation openings;

[0035] Preferably, the isolation structure is located on a side of the pixel defining layer away from the substrate;

[0036] Preferably, a portion of the first electrode is located between the pixel defining layer and the substrate, and another portion is exposed from the corresponding pixel opening.

[0037] In one embodiment, it further comprises:

[0038] A first encapsulation layer, comprising a plurality of first encapsulation parts, wherein the first encapsulation parts are located on a side of the corresponding light-emitting unit away from the substrate;

[0039] Preferably, the first packaging portion extends from a side of the corresponding light-emitting unit away from the substrate, through a side wall of the isolation structure, to a side of the isolation structure away from the substrate.

[0040] In one embodiment, it further comprises:

[0041] a second encapsulation layer, located on a side of the first encapsulation layer away from the substrate;

[0042] a third encapsulation layer, located on a side of the second encapsulation layer facing away from the substrate;

[0043] Preferably, the materials of the first encapsulation layer and the third encapsulation layer both include inorganic materials, and / or the material of the second encapsulation layer includes organic materials.

[0044] Based on the same inventive concept, the present disclosure also provides a method for preparing a display panel, the method comprising:

[0045] providing a substrate;

[0046] An isolation structure is formed on one side of the substrate, the isolation structure comprising a support portion and a crown portion sequentially stacked in a direction away from the substrate, the isolation structure encloses a plurality of isolation openings, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, wherein a length of the crown portion protruding from the support portion toward the first isolation opening is greater than a length of the crown portion protruding from the support portion toward the second isolation opening;

[0047] Sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening and the second isolation opening;

[0048] The first light-emitting material layer and the first upper electrode material layer located in the second isolation opening are removed to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding from the support portion toward the first isolation opening is equal to the length of the crown protruding from the support portion toward the second isolation opening;

[0049] sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and on a side of the first light-emitting unit away from the substrate;

[0050] The second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate are removed to obtain a second light-emitting unit located in the second isolation opening and including a second light-emitting layer and a second upper electrode stacked in sequence in a direction away from the substrate, wherein the length of the crown protruding from the support portion toward the first isolation opening is equal to the length of the crown protruding from the support portion toward the second isolation opening.

[0051] In one embodiment, the step of forming an isolation structure on one side of the substrate comprises: forming an isolation structure on one side of the substrate, the isolation structure comprising a support portion and a crown portion sequentially stacked in a direction away from the substrate, the isolation structure enclosing a plurality of isolation openings, the plurality of isolation openings comprising a first isolation opening, a second isolation opening, and a third isolation opening, wherein a length of the crown portion protruding toward the first isolation opening of the support portion is greater than a length of the crown portion protruding toward the second isolation opening of the support portion, and a length of the crown portion protruding toward the second isolation opening of the support portion is greater than a length of the crown portion protruding toward the third isolation opening of the support portion;

[0052] The step of sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening and the second isolation opening comprises: sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening, the second isolation opening and the third isolation opening;

[0053] The step of removing the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate comprises: removing the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening and the third isolation opening to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding toward the first isolation opening of the support portion is equal to the length of the crown protruding toward the second isolation opening of the support portion, and the length of the crown protruding toward the second isolation opening of the support portion is greater than the length of the crown protruding toward the third isolation opening of the support portion;

[0054] The step of sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and on the side of the first light-emitting unit away from the substrate comprises: sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and the third isolation opening and on the side of the first light-emitting unit away from the substrate;

[0055] The step of removing the second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including the second light-emitting layer and the second upper electrode sequentially stacked in a direction away from the substrate includes: removing the second light-emitting material layer and the second upper electrode material layer located in the third isolation opening and on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including the second light-emitting layer and the second upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding the support portion toward the first isolation opening is equal to the length of the crown protruding the support portion toward the second isolation opening, and the length of the crown protruding the support portion toward the second isolation opening is equal to the length of the crown protruding the support portion toward the third isolation opening.

[0056] In one embodiment, after the step of removing the second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including a second light-emitting layer and a second upper electrode sequentially stacked in a direction away from the substrate, the step further includes:

[0057] Sequentially forming a third light emitting material layer and a third upper electrode material layer in the third isolation opening and on a side of the first light emitting unit facing away from the substrate and a side of the second light emitting unit facing away from the substrate;

[0058] The third light-emitting material layer and the third upper electrode material layer located on the side of the first light-emitting unit away from the substrate and the side of the second light-emitting unit away from the substrate are removed to obtain a third light-emitting unit located in the third isolation opening and including a third light-emitting layer and a third upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding the support portion toward the first isolation opening is equal to the length of the crown protruding the support portion toward the second isolation opening, and the length of the crown protruding the support portion toward the second isolation opening is equal to the length of the crown protruding the support portion toward the third isolation opening.

[0059] Based on the same inventive concept, the present disclosure also provides a display device, which includes the above-mentioned display panel or includes a display panel manufactured by the above-mentioned manufacturing method.

[0060] Compared with the prior art, the present application improves the structure of the isolation junction of the display panel. Since there are multiple first protrusions spaced apart on the side wall surface of the support portion corresponding to the second isolation opening, the contact area between the side wall surface of the support portion and the etching liquid is increased, thereby reducing the contact volume between the side wall surface and the liquid, thereby reducing the side etching amount of the side wall surface of the support portion corresponding to the second isolation opening, avoiding over-etching of the side wall surface of the support portion corresponding to the second isolation opening in the subsequent preparation process of the light-emitting unit, so that the cathode can be reliably overlapped with the side wall surface of the corresponding support portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] 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.

[0062] Figure 1 It is a schematic diagram of the structure of the isolation structure after the light-emitting unit is prepared in the prior art;

[0063] Figure 2 A schematic diagram of the structure of the display panel provided in the first aspect of the present application;

[0064] Figure 3 for Figure 2 Schematic diagram of the cross section at a;

[0065] Figure 4 A partial cross-sectional schematic diagram of the display panel after the isolation structure is prepared;

[0066] Figure 5 It is a partial cross-sectional schematic diagram of the display panel after the first light-emitting unit is prepared;

[0067] Figure 6 A partial cross-sectional diagram of the display panel after the second light-emitting unit is prepared

[0068] Figure 7 It is a partial cross-sectional schematic diagram of the display panel after the third light-emitting unit is prepared;

[0069] Figure 8 is a schematic top view of a support portion corresponding to the first isolation opening;

[0070] Fig. 9 is a schematic top view of a support portion corresponding to the second isolation opening;

[0071] Fig.10 is a schematic top view of a support portion corresponding to a third isolation opening;

[0072] Fig.11is a schematic top view of the crown portion corresponding to the first isolation opening;

[0073] Fig.12 is a schematic top view of the crown portion corresponding to the second isolation opening;

[0074] Fig.13 is a schematic top view of the crown portion corresponding to the third isolation opening;

[0075] Fig.14 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0076] 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.

[0077] 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.

[0078] The production of a display panel includes an array substrate preparation stage, an isolation structure preparation stage, a light emitting unit preparation stage and a module preparation stage.

[0079] In the isolation structure preparation stage, it is necessary to form an isolation material layer on the substrate and perform a patterning process on it to prepare an isolation structure located in the display area. The isolation structure encloses a plurality of isolation openings, such as a first isolation opening, a second isolation opening and a third isolation opening. The first isolation opening, the second isolation opening and the third isolation opening are respectively used to accommodate light-emitting units that emit light of different colors. In the light-emitting unit preparation stage, it is necessary to evaporate the light-emitting unit material layer (such as a light-emitting functional material layer and a cathode material layer) on the entire surface of the substrate and perform a patterning process on it, such as removing the light-emitting unit material layer except the first isolation opening to form a first light-emitting unit, and then based on this method, sequentially form the second light-emitting unit and the third light-emitting unit in the second isolation opening and the third isolation opening.

[0080] The applicant further studied the process of making the isolation structure and found that after the isolation structure is prepared, the specifications of the isolation structure are basically the same (such as the side etching amount is basically the same). In this way, in the process of preparing the light-emitting units in sequence, the isolation structure corresponding to the later order is subjected to multiple etching processes (mainly wet etching) compared with the previous isolation structure. For example, the isolation structure corresponding to the third light-emitting unit is subjected to at least two more etching processes (mainly wet etching) than the isolation structure corresponding to the first light-emitting unit. In this way, after all the light-emitting units are prepared, the side etching amount of the support part of the isolation structure will change (such as Figure 1 As shown in the circled portion in the figure, the overlap between the cathode layer of the light-emitting unit that is later in the preparation sequence and its matching isolation structure deviates from the expected overlap, causing abnormal overlap.

[0081] Based on this, the present application provides a display panel, which includes a substrate 10, an isolation structure 20 and a plurality of light-emitting units 20, the isolation structure 20 is arranged on the substrate 10, the isolation structure 20 includes a support portion 21, the isolation structure 20 encloses a plurality of isolation openings 23, the plurality of isolation openings 23 include a first isolation opening 23B and a second isolation opening 23G, the support portion 21 includes a first main body portion 210 and a plurality of first protrusions 211, the plurality of first protrusions 211 are arranged at intervals and protrude from the first main body portion 210 toward the second isolation opening 23G; the plurality of light-emitting units 30 include a first light-emitting unit 30B and a second light-emitting unit 30G, at least one of the first light-emitting units 30B Part of it is located in the first isolation opening 23B, at least part of the second light-emitting unit 30G is located in the second isolation opening 23G, the light-emitting color of the first light-emitting unit 30B is different from the light-emitting color of the second light-emitting unit 30G, and since the support portion 21 is provided with a plurality of first protrusions 211 arranged at intervals toward the second isolation opening 23G, the contact area between the side wall surface of the support portion 21 and the etching liquid is increased, thereby reducing the contact volume between the side wall surface and the liquid, thereby reducing the side engraving amount of the side wall surface of the support portion 21 corresponding to the second isolation opening 23G, avoiding over-engraving of the side wall surface of the support portion corresponding to the second isolation opening 23G in the subsequent preparation process of the light-emitting unit, so that the cathode can be reliably overlapped with the side wall surface of the corresponding isolation structure.

[0082] Next, combine Figure 2-Figure 13 The display panel provided by the embodiment of the present application is described. The display panel includes a display area AA and a non-display area NA located outside the display area AA.

[0083] In the present disclosure, the substrate 10 includes a substrate and a driving circuit layer. The substrate can be a rigid substrate or a flexible substrate. When the substrate is a rigid substrate, the material of the substrate can be glass or silicon wafer, etc. When the substrate is a flexible substrate, the material of the substrate can be polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC) or cellulose acetate propionate (CAP), etc. The driving circuit layer 12 includes a plurality of pixel driving circuits located in the display area, and the light-emitting unit 30 is electrically connected to the pixel driving circuit. For example, the pixel driving circuit 121 may include a plurality of transistors TFT, capacitors, etc., such as 2T1C (i.e., 2 transistors (TFT) and 1 capacitor (C)), 3T1C or 7T1C, etc. The pixel driving circuit is connected to the light-emitting unit 30 to control the switching state and the light-emitting brightness of the light-emitting unit 30.

[0084] refer to Figure 7-10 In one embodiment, the plurality of isolation openings 23 may further include a first isolation opening 23B, a second isolation opening 23G, and a third isolation opening 23R, the support portion includes a first main body portion 210, a plurality of first protrusions 211, and a plurality of second protrusions 212, the plurality of first protrusions 211 are arranged at intervals and protrude from the first main body portion 210 toward the second isolation opening 23G, the plurality of second protrusions 212 are arranged at intervals and protrude from the first main body portion 210 toward the third isolation opening 23R; the plurality of light-emitting units 30 may further include a first light-emitting unit 30B, a second light-emitting unit 30G, and a third light-emitting unit 30R, the light-emitting color of the first light-emitting unit 30B, the light-emitting color of the second light-emitting unit 30G, and the light-emitting color of the third light-emitting unit 30 The luminous colors of R are different from each other, such as the first light-emitting unit 30B emits blue light, the second light-emitting unit 30G emits green light, and the third light-emitting unit 30R emits red light, wherein at least a portion of the first light-emitting unit 30B is located in the first isolation opening 23B, at least a portion of the second light-emitting unit 30G is located in the second isolation opening 23G, and at least a portion of the third light-emitting unit 30R is located in the third isolation opening 23R. In this embodiment, by providing a plurality of first protrusions 211 and a plurality of second protrusions 212, the contact area between the side wall surface of the support portion 21 and the etching liquid can be increased, thereby reducing the contact volume between the side wall surface of the support portion 21 and the chemical solution, thereby reducing the side engraving amount of the side wall surface of the support portion 21 corresponding to the second isolation opening and the third isolation opening.

[0085] It should be noted that, in this embodiment, the multiple first protrusions 211 are arranged at intervals around the corresponding second isolation openings 23G, and the multiple second protrusions 212 are arranged at intervals around the corresponding third isolation openings 23R. Furthermore, the first protrusions 211 extend along the first direction (Z direction) passing through the plane where the substrate 10 is located, and have a first end 2111 close to the substrate 10 and a second end away from the substrate 10 (not shown in the drawings), and the second protrusions 212 extend along the first direction (Z direction) passing through the plane where the substrate 10 is located, and have a second end 2121 close to the substrate 10 and a third end away from the substrate 10 (not shown in the drawings).

[0086] refer to Figure 8-Figure 10 In one embodiment, since the support portion 21 corresponding to the third light-emitting unit 30R undergoes at least two more etching processes (mainly wet etching) than the support portion 21 corresponding to the second light-emitting unit 30G during the preparation stage of the light-emitting unit, in order to reduce the side etching amount of the side wall surface of the support portion 21 corresponding to the third isolation opening 23R, the side etching amount of the side wall surface of the support portion 21 corresponding to the third isolation opening 23R is balanced with the side wall surface of the support portion 21 corresponding to the second isolation opening 23G, so that the arrangement density of the plurality of second protrusions 212 is large. Regarding the arrangement density of the plurality of first protrusions 211, it can also be understood that the gap W1 between two adjacent first protrusions 211 is greater than the gap W2 between two adjacent second protrusions 212. This design enables the contact area between the etching liquid and the side wall surface of the third isolation opening 23R corresponding to the support portion 21 to be greater than the contact area between the etching liquid and the side wall surface of the second isolation opening 23G corresponding to the support portion, thereby reducing the contact volume between the side wall surface of the support portion 21 and the drug solution, and further reducing the side etching amount of the side wall surface of the support portion 21 corresponding to the third isolation opening 23R.

[0087] Continue to refer Figure 8-Figure 10 Furthermore, the length H1 of the first protrusion 211 protruding from the first main body 210 toward the second isolation opening 23G is less than the length H2 of the second protrusion 212 protruding from the first main body 210 toward the third isolation opening 23R. This design further increases the contact area between the etching liquid and the side wall surface of the support portion 21 corresponding to the third isolation opening 23R, so that the contact area between the etching liquid and the side wall surface of the support portion 21 corresponding to the third isolation opening 23R is greater than the contact area between the etching liquid and the side wall surface of the support portion corresponding to the second isolation opening, thereby reducing the contact volume between the side wall surface of the support portion 21 and the liquid, and then reducing the side etching amount of the side wall surface of the support portion 21 corresponding to the third isolation opening 23R.

[0088] refer to Figure 7In one embodiment, the isolation structure 20 may further include a support portion 21 and a crown portion 22 , wherein the crown portion 22 is located on the side of the support portion 21 facing away from the substrate 10 , and the orthographic projection of the support portion 21 on the substrate 10 is located within the orthographic projection range of the crown portion 22 on the substrate 10 .

[0089] refer to Figure 11-13 It should be noted that, during the preparation stage of the isolation structure 20, while the support portion forms the first main body 210, a plurality of first protrusions 211 and a plurality of second protrusions 212, the crown portion 22 also forms the second main body 220, a plurality of third protrusions 221 and a plurality of fourth protrusions 222, that is, the crown portion 22 includes the second main body 220, a plurality of third protrusions 221 and a plurality of fourth protrusions 222, the plurality of third protrusions 221 are arranged at intervals and protrude from the second main body 220 toward the second isolation opening 23G, the plurality of fourth protrusions 222 are arranged at intervals and protrude from the second main body 220 toward the third isolation opening 23R, wherein the length H3 of the third protrusion 221 protruding from the second main body 220 toward the second isolation opening 23G is less than the length H4 of the fourth protrusion 222 protruding from the second main body 220 toward the third isolation opening 23R. The gap W3 between two adjacent third protrusions 221 is greater than the gap W4 between two adjacent fourth protrusions 222.

[0090] During the preparation stage of the light-emitting unit, there is a small amount of side engraving on the side wall of the support portion, so the length H1 of the first protrusion 211 protruding from the first main body portion 210 toward the second isolation opening 23G is smaller than the length H3 of the third protrusion 221 protruding from the second main body portion 220 toward the second isolation opening 23G; similarly, the length H2 of the second protrusion 212 protruding from the first main body portion 210 toward the third isolation opening 23R is smaller than the length H4 of the fourth protrusion 222 protruding from the second main body portion 220 toward the third isolation opening 23R.

[0091] Exemplarily, in the present disclosure, the material of the support portion 21 of the isolation structure 20 includes aluminum, and / or the material of the crown portion 22 includes titanium.

[0092] refer to Figure 7In one embodiment, the crown 22 protrudes toward the first isolation opening 23B beyond the first length L1 of the support portion, the crown 22 protrudes toward the second isolation opening 23G beyond the second length L2 of the support portion, and the crown 22 protrudes toward the third isolation opening 23R beyond the third length L3 of the support portion, wherein the first length L1 is equal to the second length L2, and / or the first length L1 is equal to the third length L3, and / or the second length L2 is equal to the third length L3. It should be noted that, here specifically refers to that after the preparation of multiple light-emitting units is completed, the first length L1 is equal to the second length L2 is equal to the third length L3. Furthermore, the length H1 of the first protrusion 211 protruding from the first main body 210 toward the second isolation opening 23G is less than the second length L2; and / or the length H2 of the second protrusion 212 protruding from the first main body toward the third isolation opening 23R is less than the third length L3.

[0093] It should be noted that the first length L1, the second length L2 and the third length L3 are variable during the preparation of the isolation structure and the preparation of the light emitting unit, as shown in the following:

[0094] refer to Figure 4In the isolation structure preparation stage, an isolation material layer is first formed on the substrate 10, wherein the isolation material layer includes a first isolation material layer and a second isolation material layer located on the side of the first isolation material layer away from the substrate 10, wherein the first isolation material layer includes an aluminum isolation material layer and the second isolation material layer includes a titanium isolation material layer, and the first isolation material layer and the second isolation material layer are patterned to form a support portion and a crown portion. The isolation material layer is first patterned by dry etching, and then the dry-etched isolation material layer is patterned by wet etching. It should be noted that, during dry etching, the titanium isolation material layer and the aluminum isolation material layer are dry-etched simultaneously, and during the dry etching process, the titanium isolation material layer and the aluminum isolation material layer form a plurality of first protrusions and third protrusions spaced apart on the edge side walls corresponding to the second isolation opening 23G, and the titanium isolation material layer and the aluminum isolation material layer form a plurality of fourth protrusions and second protrusions spaced apart on the side walls corresponding to the third isolation opening 23R, respectively (it should be noted that the first protrusions and the second protrusions here are protrusions of the initial shape and have not undergone wet etching). Then, during the wet etching process, since the aluminum isolation material layer corresponds to the side walls of the second isolation opening 23G and the side walls of the third isolation opening, respectively, there are a plurality of first protrusions and second protrusions spaced apart on the side walls, the contact area between the side walls of the aluminum isolation material layer and the etching solution is increased. Thereby reducing the side engraving amount of the support portion corresponding to the first isolation opening and the second isolation opening, so after the isolation structure is prepared (before preparing the light-emitting unit), the length L1 of the support portion protruding from the crown 22 toward the first isolation opening 23B is greater than the length L20 of the support portion protruding from the crown 22 toward the first isolation opening 23B, and the length L20 of the support portion protruding from the crown 22 toward the first isolation opening 23B is greater than the third length L30 of the support portion protruding from the crown 22 toward the third isolation opening 23R.

[0095] refer to Figure 5-Figure 7 In the multiple light-emitting unit stages, since the preparation order of the light-emitting unit 30 in the present disclosure is to first prepare the first light-emitting unit 30B, then prepare the second light-emitting unit 30G, and finally prepare the third light-emitting unit 30R, the side wall surface of the support portion 21 corresponding to the second isolation opening 23G needs to undergo one wet etching in the preparation stage of the light-emitting unit 30, and the side wall surface of the support portion 21 corresponding to the third isolation opening 23R needs to undergo two wet etchings in the preparation stage of the light-emitting unit 30.

[0096] After the first light emitting unit 30B is prepared (eg Figure 5As shown), here, since the side wall surfaces of the support portion corresponding to the second isolation opening and the third isolation opening are wet-etched once, compared with the isolation structure preparation stage, the length of the support portion of the crown 22 protruding toward the second isolation opening 23G is changed. Similarly, the length of the support portion of the crown 22 protruding toward the third isolation opening 23R is also changed. Therefore, the length L1 of the support portion of the crown 22 protruding toward the first isolation opening 23B is equal to the length L2 of the support portion of the crown 22 protruding toward the second isolation opening 23G, and the length L2 of the support portion of the crown 22 protruding toward the second isolation opening 23G is greater than the length L31 of the support portion of the crown 22 protruding toward the third isolation opening 23R.

[0097] After the second light-emitting unit is prepared (such as Figure 6 As shown), here, since the side wall surface of the support portion corresponding to the third isolation opening is wet-etched once, the length of the support portion of the crown 22 protruding toward the third isolation opening 23R is changed compared to the preparation stage of the first light-emitting unit 30B, so the length L1 of the support portion protruding toward the first isolation opening 23B of the crown 22 is equal to the length L2 of the support portion protruding toward the second isolation opening 23G of the crown 22, and the length L2 of the support portion protruding toward the second isolation opening 23G of the crown 22 is equal to the length L3 of the support portion protruding toward the third isolation opening 23R of the crown 22.

[0098] After the third light-emitting unit is prepared (such as Figure 7 As shown, here, since the side wall surface of the support portion corresponding to the isolation opening does not need to be wet-etched, compared with the preparation stage of the second light-emitting unit 30G, the length of the support portion of the crown 22 protruding toward the third isolation opening 23R does not change, so the length L1 (also referred to as the first length) of the support portion of the crown 22 protruding toward the first isolation opening 23B is equal to the length L2 (also referred to as the second length) of the support portion of the crown 22 protruding toward the second isolation opening 23G, and the length L2 of the support portion of the crown 22 protruding toward the second isolation opening 23G is equal to the length L3 (also referred to as the second length) of the support portion of the crown 22 protruding toward the third isolation opening 23R.

[0099] refer to Figure 5-Figure 7In one embodiment, the light-emitting unit 30 is electrically connected to the isolation structure 20, and each light-emitting unit 30 includes a first electrode 31 (also referred to as a lower electrode), a light-emitting functional layer 32, and a second electrode 33 (also referred to as an upper electrode) sequentially stacked in a direction away from the substrate 10, and the second electrode 33 (upper electrode) is electrically connected to the isolation structure. Specifically, the light-emitting functional layer 32 is located on the side of the first electrode 31 (lower electrode) away from the substrate 10, and the second electrode 33 (upper electrode) is located on the side of the light-emitting functional layer 32 away from the substrate 10, and overlaps the isolation structure 20 to achieve the electrical connection between the second electrode 33 (upper electrode) and the isolation structure 20. In the present disclosure, the first electrode 31 (lower electrode) may be an anode, and the second electrode (upper electrode) 33 may be a cathode. In some embodiments of the present disclosure, some film layers in the light-emitting functional layer 32, such as the light-emitting layer, can be prepared by non-evaporation methods such as inkjet printing, which can be selected according to the materials of these film layers. For example, when these film layers are polymer materials and are not suitable for evaporation, they can be prepared by inkjet printing.

[0100] In one embodiment, the protrusion is in the shape of a rectangular parallelepiped or at least partially in the shape of a rectangular parallelepiped. In other embodiments, the protrusion is at least partially in the shape of an ellipse, a semicircle, a triangle, or the like.

[0101] refer to Figure 7 In one embodiment, the display panel further includes a pixel defining layer, which is disposed on one side of the substrate 10. The pixel defining layer encloses a plurality of pixel openings, the pixel openings are connected to corresponding isolation openings, and the orthographic projection of the pixel opening on the substrate 10 is located within the orthographic projection of the isolation opening on the substrate 10. Specifically, the isolation structure 20 is located on a side of the pixel defining portion 40 away from the substrate 10, a portion of the first electrode 31 (lower electrode) is located between the pixel defining layer and the substrate, and another portion is exposed from the corresponding pixel opening.

[0102] Continue to refer Figure 7In one embodiment, the display panel further includes a first encapsulation layer 50, the first encapsulation layer includes a plurality of first encapsulation parts 51, the first encapsulation parts 51 are located on the side of the corresponding light-emitting unit 30 away from the substrate, the first encapsulation parts 51 extend from the side of the corresponding light-emitting unit away from the substrate 30, through the sidewall of the isolation structure to the side of the isolation structure away from the substrate, further, the display panel further includes a second encapsulation layer (not shown in the drawings) and a third encapsulation layer (not shown in the drawings), the second encapsulation layer is located on the side of the first encapsulation layer away from the substrate 10, and the third encapsulation layer is located on the side of the second encapsulation layer away from the substrate 10, for example, the materials of the first encapsulation layer and the third encapsulation layer both include inorganic materials, and / or, the material of the second encapsulation layer includes organic materials. In this way, multi-layer encapsulation is achieved by the first encapsulation layer, the second encapsulation layer and the third encapsulation layer, which can further improve the encapsulation performance and the reliability of the display panel. The stacking of the inorganic layer and the organic layer provides protection for the display panel. Inorganic materials generally have good density and can isolate water vapor and oxygen. Organic materials have flexible characteristics. Using organic materials as a layer of the second encapsulation layer 60 can buffer stress from the outside and prevent the display panel from being affected by external stress. At the same time, it can reduce the risk of encapsulation failure caused by inorganic layer breakage.

[0103] refer to Figure 4-Figure 7 and Fig.14 Based on the same inventive concept, the present disclosure also provides a method for manufacturing a display panel, the method comprising:

[0104] S10: providing a substrate 10;

[0105] refer to Figure 4 , S20: An isolation structure 20 is formed on one side of the substrate 10, the isolation structure 20 includes a support portion 21 and a crown portion 22 which are sequentially stacked in a direction away from the substrate 10, the isolation structure 22 encloses a plurality of isolation openings 23, the isolation openings 23 include a first isolation opening 23B and a second isolation opening 23G, wherein the length L1 of the crown portion 22 protruding the support portion 21 toward the first isolation opening 23B is greater than the length L20 of the crown portion 22 protruding the support portion 21 toward the second isolation opening 23G;

[0106] S30: forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening 23B and the second isolation opening 23G in sequence,

[0107] refer to Figure 5, S40: remove the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening 23G, and obtain a first light-emitting unit 30B located in the first isolation opening 23B and including a first light-emitting layer and a first upper electrode stacked in sequence in a direction away from the substrate 10, wherein the length L1 of the support portion protruding from the crown toward the first isolation opening 23B is equal to the length L2 of the support portion protruding from the crown 22 toward the second isolation opening 23G; here, since the support portion is wet-etched once on the side wall surface corresponding to the second isolation opening, the length L2 of the support portion protruding from the crown 22 toward the second isolation opening 23G in this step is less than the length L20 of the support portion protruding from the crown 22 toward the second isolation opening 23G in step S20.

[0108] S50: sequentially forming a second light emitting material layer and a second upper electrode material layer in the second isolation opening 23G and on the side of the first light emitting unit 30B facing away from the substrate 10;

[0109] refer to Figure 6 , S60: remove the second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit 30B away from the substrate 10, and obtain a second light-emitting unit 30G located in the second isolation opening 23G and including the second light-emitting layer and the second upper electrode sequentially stacked in the direction away from the substrate 10, wherein the length L1 of the crown 22 protruding toward the first isolation opening 23B of the support portion 21 is equal to the length L2 of the crown 22 protruding toward the second isolation opening 23G. Here, since the side wall surface of the support portion corresponding to the second isolation opening is not uniformly wet-etched, the length L2 of the crown 22 protruding toward the second isolation opening 23G in this step is equal to the length L2 of the crown 22 protruding toward the second isolation opening 23G in step S40.

[0110] refer to Figure 4 In one embodiment, step S20 further includes: forming an isolation structure 20 on one side of the substrate 10, the isolation structure 20 includes a support portion 21 and a crown portion 22 sequentially stacked in a direction away from the substrate 10, the isolation structure 20 encloses a plurality of isolation openings 23, the plurality of isolation openings 23 include a first isolation opening 23B, a second isolation opening 23G, and a third isolation opening 23R, wherein a length L1 of the support portion 21 protruding from the crown portion 22 toward the first isolation opening 23B is greater than a length L20 of the support portion 21 protruding from the crown portion 22 toward the second isolation opening 23G, and a length L20 of the support portion 21 protruding from the crown portion 22 toward the second isolation opening 23G is greater than a length L30 of the support portion protruding from the crown portion 22 toward the third isolation opening 23R;

[0111] In one embodiment, step S30 further includes: sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening 23B, the second isolation opening 23G, and the third isolation opening 23R;

[0112] refer to Figure 5 In one embodiment, step S40 further includes: removing the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening 23G and the third isolation opening 23R, and obtaining a first light-emitting unit 30B located in the first isolation opening 23B and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate 10, wherein the length L1 of the crown portion 22 protruding toward the first isolation opening 23B of the support portion 21 is equal to the length L2 of the crown portion 22 protruding toward the second isolation opening 23G of the support portion 21, and the length L2 of the crown portion 22 protruding toward the second isolation opening 23G of the support portion 21 is equal to the length L3 of the crown portion 22 protruding toward the second isolation opening 23G of the support portion 21. The length L2 is greater than the length L31 of the support portion 21 of the crown 22 protruding toward the third isolation opening 23R; in this step, since the side wall surfaces of the support portion corresponding to the second isolation opening and the third isolation opening are wet-etched once, the length L2 of the support portion protruding toward the second isolation opening 23G in this step is less than the length L20 of the support portion protruding toward the second isolation opening 23G in step S20; the length L31 of the support portion protruding toward the third isolation opening 23R in this step is less than the length L30 of the support portion protruding toward the second isolation opening 23G in step S20.

[0113] In one embodiment, step S50 further includes: sequentially forming a second light emitting material layer and a second upper electrode material layer in the second isolation opening 23G and the third isolation opening 23R and on a side of the first light emitting unit 30B away from the substrate 10 ;

[0114] refer to Figure 6 In one embodiment, step S60 further includes: removing the second light emitting material layer and the second upper electrode material layer located in the third isolation opening 23R and located on the side of the first light emitting unit 30B away from the substrate 10, so as to obtain a second light emitting unit 30G located in the second isolation opening 23G and including a second light emitting layer and a second upper electrode sequentially stacked in a direction away from the substrate 10, wherein the length L1 of the support portion 21 protruding from the crown portion 22 toward the first isolation opening 23B is equal to the length L2 of the support portion 21 protruding from the crown portion 22 toward the second isolation opening 23G, and the length L2 of the support portion 21 protruding from the crown portion 22 toward the second isolation opening 23G is equal to the length L3 of the support portion protruding from the crown portion 22 toward the third isolation opening 23R. In this step, since the support portion is wet-etched once on the sidewall surface corresponding to the third isolation opening, the length L3 of the support portion protruding from the crown portion 22 toward the third isolation opening 23R in this step is less than the length L31 of the support portion protruding from the crown portion 22 toward the third isolation opening 23R in step S40.

[0115] In one embodiment, after step S60, the method further includes:

[0116] S70: sequentially forming a third light emitting material layer and a third upper electrode material layer in the third isolation opening 23R and on the side of the first light emitting unit 30B facing away from the substrate 10 and the side of the second light emitting unit 30G facing away from the substrate 10;

[0117] S80: removing the third light-emitting material layer and the third upper electrode material layer located on the side of the first light-emitting unit 30B away from the substrate 10 and the side of the second light-emitting unit 30G away from the substrate 10, and obtaining a third light-emitting unit 30R located in the third isolation opening 23R and including a third light-emitting layer and a third upper electrode sequentially stacked in the direction 10 away from the substrate, wherein the length L1 of the support portion protruding from the crown 22 toward the first isolation opening 23B is equal to the length L2 of the support portion protruding from the crown 22 toward the second isolation opening 23G, and the length L2 of the support portion 21 protruding from the crown 22 toward the second isolation opening 23G is equal to the length L3 of the support portion 21 protruding from the crown 22 toward the third isolation opening 23R. In this step, since the side wall surface of the support portion corresponding to the third isolation opening is not wet-etched, the length L3 of the support portion protruding from the crown 22 toward the third isolation opening 23R in this step is equal to the length L3 of the support portion protruding from the crown 22 toward the third isolation opening 23R in step S40.

[0118] Based on the same inventive concept, the present application provides a display device, which includes the display panel in the above embodiment. The pixel density range of the display device is 400PPI to 7000PPI, which is suitable for scenes such as televisions and laptops, and can also make the product suitable for use in micro-display products (such as AR, VR, etc.). Furthermore, the display device can be any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, a console, etc.

[0119] 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.

[0120] 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.

[0121] 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 is disposed on the substrate, the isolation structure includes a support portion, the isolation structure encloses a plurality of isolation openings, the plurality of isolation openings include a first isolation opening and a second isolation opening, the support portion includes a first main body portion and a plurality of first protrusions, the plurality of first protrusions are arranged at intervals and protrude from the first main body portion toward the second isolation opening; A plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, wherein at least a portion of the first light-emitting unit is located in the first isolation opening, and at least a portion of the second light-emitting unit is located in the second isolation opening, and a light-emitting color of the first light-emitting unit is different from a light-emitting color of the second light-emitting unit.

2. The display panel according to claim 1, wherein: The plurality of first protrusions are arranged at intervals around the corresponding second isolation openings; Preferably, the first protrusion extends along a first direction passing through a plane where the substrate is located, and has a first end close to the substrate and a second end away from the substrate.

3. The display panel according to claim 1, wherein: The plurality of isolation openings further include a third isolation opening, the support portion further includes a plurality of second protrusions, and the plurality of light emitting units further include a third light emitting unit, wherein: The plurality of second protrusions are arranged at intervals and protrude from the first main body toward the third isolation opening; At least a portion of the third light-emitting unit is located in the third isolation opening, and the light-emitting colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different from each other; Preferably, the arrangement density of the plurality of second protrusions is greater than the arrangement density of the plurality of first protrusions; Preferably, the plurality of second protrusions are arranged at intervals around the corresponding third isolation openings; Preferably, the second protrusion extends along a first direction passing through a plane where the substrate is located, and has a third end portion close to the substrate and a fourth end portion away from the substrate.

4. The display panel according to claim 3, wherein: The length of the first protrusion protruding from the first main body toward the second isolation opening is smaller than the length of the second protrusion protruding from the first main body toward the third isolation opening; Preferably, a gap between two adjacent first protrusions is larger than a gap between two adjacent second protrusions.

5. The display panel according to claim 3, wherein: The isolation structure further includes a crown portion, the crown portion is located on a side of the support portion away from the substrate, and the orthographic projection of the support portion on the substrate is located within the orthographic projection range of the crown portion on the substrate; Preferably, the crown protrudes toward the first isolation opening by a first length of the support portion, the crown protrudes toward the second isolation opening by a second length of the support portion, and the crown protrudes toward the third isolation opening by a third length of the support portion, wherein: The first length is equal to the second length, and / or the first length is equal to the third length, and / or the second length is equal to the third length; Preferably, the crown portion includes a second main body portion, a plurality of third protrusions and a plurality of fourth protrusions, wherein the plurality of third protrusions are arranged at intervals and protrude from the second main body portion toward the second isolation opening, and the plurality of fourth protrusions are arranged at intervals and protrude from the second main body portion toward the third isolation opening; Preferably, a length of the third protrusion protruding from the second main body toward the second isolation opening is smaller than a length of the fourth protrusion protruding from the second main body toward the third isolation opening; Preferably, the length of the first protrusion protruding from the first main body toward the second isolation opening is smaller than the length of the third protrusion protruding from the second main body toward the second isolation opening; Preferably, the length of the second protrusion protruding from the first main body toward the third isolation opening is smaller than the length of the fourth protrusion protruding from the second main body toward the third isolation opening; Preferably, the gap between two adjacent third protrusions is larger than the gap between two adjacent fourth protrusions.

6. The display panel according to claim 5, wherein: The length of the first protrusion protruding from the first main body toward the second isolation opening is less than the second length; and / or, A length of the second protrusion protruding toward the third isolation opening from the first main body is less than the third length.

7. The display panel according to claim 5, wherein: The material of the isolation structure includes a conductive material; Preferably, the material of the support portion includes a conductive material; Preferably, the material of the crown comprises titanium, and / or the material of the support comprises aluminum.

8. The display panel according to claim 1, wherein: The light-emitting unit comprises a lower electrode, a light-emitting functional layer and an upper electrode which are sequentially stacked in a direction away from the substrate, and the upper electrode is electrically connected to the isolation structure.

9. The display panel according to claim 8, wherein: Also includes: A pixel defining layer, located on one side of the substrate, the pixel defining layer encloses a plurality of pixel openings, and the pixel openings are connected to the corresponding isolation openings; Preferably, the isolation structure is located on a side of the pixel defining layer away from the substrate; Preferably, a portion of the upper electrode is located between the pixel defining layer and the substrate, and another portion is exposed from the corresponding pixel opening.

10. The display panel according to claim 9, wherein: Also includes: A first encapsulation layer, comprising a plurality of first encapsulation parts, wherein the first encapsulation parts are located on a side of the corresponding light-emitting unit away from the substrate; Preferably, the first packaging portion extends from a side of the corresponding light-emitting unit away from the substrate, through a side wall of the isolation structure, to a side of the isolation structure away from the substrate.

11. The display panel according to claim 10, wherein: Also includes: a second encapsulation layer, located on a side of the first encapsulation layer away from the substrate; a third encapsulation layer, located on a side of the second encapsulation layer facing away from the substrate; Preferably, the materials of the first encapsulation layer and the third encapsulation layer both include inorganic materials, and / or the material of the second encapsulation layer includes organic materials.

12. A method for preparing a display panel, characterized in that: The preparation method comprises: providing a substrate; An isolation structure is formed on one side of the substrate, the isolation structure comprising a support portion and a crown portion sequentially stacked in a direction away from the substrate, the isolation structure encloses a plurality of isolation openings, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, wherein a length of the crown portion protruding from the support portion toward the first isolation opening is greater than a length of the crown portion protruding from the support portion toward the second isolation opening; Sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening and the second isolation opening; The first light-emitting material layer and the first upper electrode material layer located in the second isolation opening are removed to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding from the support portion toward the first isolation opening is equal to the length of the crown protruding from the support portion toward the second isolation opening; sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and on a side of the first light-emitting unit away from the substrate; The second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate are removed to obtain a second light-emitting unit located in the second isolation opening and including a second light-emitting layer and a second upper electrode stacked in sequence in a direction away from the substrate, wherein the length of the crown protruding from the support portion toward the first isolation opening is equal to the length of the crown protruding from the support portion toward the second isolation opening.

13. The preparation method according to claim 12, characterized in that: The step of forming an isolation structure on one side of the substrate comprises: forming an isolation structure on one side of the substrate, the isolation structure comprising a support portion and a crown portion sequentially stacked in a direction away from the substrate, the isolation structure enclosing a plurality of isolation openings, the plurality of isolation openings comprising a first isolation opening, a second isolation opening and a third isolation opening, wherein a length of the crown portion protruding toward the first isolation opening of the support portion is greater than a length of the crown portion protruding toward the second isolation opening of the support portion, and a length of the crown portion protruding toward the second isolation opening of the support portion is greater than a length of the crown portion protruding toward the third isolation opening of the support portion; The step of sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening and the second isolation opening comprises: sequentially forming a first light emitting material layer and a first upper electrode material layer in the first isolation opening, the second isolation opening and the third isolation opening; The step of removing the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate comprises: removing the first light-emitting material layer and the first upper electrode material layer located in the second isolation opening and the third isolation opening to obtain a first light-emitting unit located in the first isolation opening and including a first light-emitting layer and a first upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding toward the first isolation opening of the support portion is equal to the length of the crown protruding toward the second isolation opening of the support portion, and the length of the crown protruding toward the second isolation opening of the support portion is greater than the length of the crown protruding toward the third isolation opening of the support portion; The step of sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and on the side of the first light-emitting unit away from the substrate comprises: sequentially forming a second light-emitting material layer and a second upper electrode material layer in the second isolation opening and the third isolation opening and on the side of the first light-emitting unit away from the substrate; The step of removing the second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including the second light-emitting layer and the second upper electrode sequentially stacked in a direction away from the substrate includes: removing the second light-emitting material layer and the second upper electrode material layer located in the third isolation opening and on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including the second light-emitting layer and the second upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding the support portion toward the first isolation opening is equal to the length of the crown protruding the support portion toward the second isolation opening, and the length of the crown protruding the support portion toward the second isolation opening is equal to the length of the crown protruding the support portion toward the third isolation opening.

14. The preparation method according to claim 13, characterized in that: After the step of removing the second light-emitting material layer and the second upper electrode material layer located on the side of the first light-emitting unit away from the substrate to obtain a second light-emitting unit located in the second isolation opening and including a second light-emitting layer and a second upper electrode sequentially stacked in a direction away from the substrate, the method further includes: Sequentially forming a third light emitting material layer and a third upper electrode material layer in the third isolation opening and on the side of the first light emitting unit facing away from the substrate and the side of the second light emitting unit facing away from the substrate; The third light-emitting material layer and the third upper electrode material layer located on the side of the first light-emitting unit away from the substrate and the side of the second light-emitting unit away from the substrate are removed to obtain a third light-emitting unit located in the third isolation opening and including a third light-emitting layer and a third upper electrode sequentially stacked in a direction away from the substrate, wherein the length of the crown protruding the support portion toward the first isolation opening is equal to the length of the crown protruding the support portion toward the second isolation opening, and the length of the crown protruding the support portion toward the second isolation opening is equal to the length of the crown protruding the support portion toward the third isolation opening.

15. A display device, characterized in that: A display panel comprising the display panel as described in any one of claims 1 to 11, or a display panel manufactured by the method for manufacturing a display panel as described in any one of claims 12 to 14.

Images