Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The problem that in the prior art, the yield of display products is low is solved. The display panel comprises a substrate, an isolation structure and a plurality of sub-pixels, the isolation structure is located on one side of the substrate, a plurality of isolation openings are defined by the isolation structure, and the isolation openings comprise first isolation openings; the isolation structure comprises a first part and a second part, the first part is located on the side, close to the substrate, of the second part, and the orthographic projection of the first part on the substrate is located in the orthographic projection range of the second part on the substrate; the first part is provided with a first surface facing the second part and a second surface deviating from the second part; the orthographic projection of the first surface on the substrate is close to the edge line of the first isolation opening and is located outside the orthographic projection of the second surface on the substrate; the sub-pixels are located in the isolation openings.

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 Display (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, current display products have a low yield rate. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a display panel and a method for manufacturing the same, and a display device, which solve the problem of low yield of display products in the prior art.

[0005] In a first aspect, the present application provides a display panel. The display panel includes a substrate, an isolation structure, and a plurality of sub-pixels, wherein the isolation structure is located on one side of the substrate, the isolation structure encloses a plurality of isolation openings, and the plurality of isolation openings include a first isolation opening; the isolation structure includes a first portion and a second portion, the first portion is located on a side of the second portion close to the substrate, and the orthographic projection of the first portion on the substrate is located within the orthographic projection range of the second portion on the substrate; the first portion has a first surface facing the second portion and a second surface facing away from the second portion; an edge line of the orthographic projection of the first surface on the substrate close to the first isolation opening is located outside the orthographic projection of the second surface on the substrate; and the sub-pixel is located within the isolation opening.

[0006] In combination with the first aspect, in some possible embodiments, the distance between the edge line of the orthographic projection of the first surface on the substrate close to the first isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the first isolation opening is greater than or equal to 890 angstroms and less than or equal to 8400 angstroms; preferably, the multiple sub-pixels include a first sub-pixel, the first sub-pixel is located in the first isolation opening, and the first sub-pixel is a red sub-pixel.

[0007] In combination with the first aspect, in some possible embodiments, the first portion has a first side wall close to the first isolation opening, and an angle between the first side wall and a direction parallel to the substrate is greater than or equal to 50 degrees and less than or equal to 85 degrees; preferably, the first side wall is a smooth surface.

[0008] In combination with the first aspect, in some possible embodiments, the distance between the orthographic projection of the second portion on the substrate close to the edge line of the first isolation opening and the orthographic projection of the second surface on the substrate close to the edge line of the first isolation opening is greater than or equal to 4000 angstroms and less than or equal to 6000 angstroms.

[0009] In combination with the first aspect, in some possible embodiments, the multiple isolation openings also include a second isolation opening, and an edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening is located outside the orthographic projection of the second surface on the substrate; preferably, the distance between the edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 0 angstroms and less than or equal to 5860 angstroms; preferably, the first portion has a second side wall close to the second isolation opening, and the angle between the first side wall and the substrate is greater than or equal to 60 degrees and less than or equal to 90 degrees; preferably, the second side wall is a smooth surface.

[0010] In combination with the first aspect, in some possible embodiments, the multiple isolation openings also include a second isolation opening, and an edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is located outside the orthographic projection of the first surface on the substrate; preferably, the distance between the edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 0 angstroms and less than or equal to 2750 angstroms; preferably, the first portion has a second side wall close to the second isolation opening, and the angle between the first side wall and the substrate is greater than or equal to 90 degrees and less than or equal to 105 degrees; preferably, the second side wall is a smooth surface.

[0011] In combination with the first aspect, in some possible embodiments, the distance between the edge line of the orthographic projection of the second portion on the substrate close to the second isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 6000 angstroms and less than or equal to 8000 angstroms; preferably, the plurality of sub-pixels further include a second sub-pixel, the second sub-pixel is located in the second isolation opening, and the second sub-pixel is a green sub-pixel.

[0012] In combination with the first aspect, in some possible embodiments, the multiple isolation openings further include a third isolation opening, and an edge line of the orthographic projection of the second surface on the substrate close to the third isolation opening is located outside the orthographic projection of the first surface on the substrate; preferably, the multiple sub-pixels further include a third sub-pixel, the third sub-pixel is located in the third isolation opening, and the third sub-pixel is a blue sub-pixel.

[0013] In combination with the first aspect, in some possible embodiments, the distance between the edge line of the orthographic projection of the first surface on the substrate close to the third isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the third isolation opening is greater than or equal to 250 angstroms and less than or equal to 8400 angstroms.

[0014] In combination with the first aspect, in some possible implementations, the first portion has a third sidewall close to the third isolation opening, the third sidewall is a smooth surface, and an angle between the first sidewall and the substrate is greater than or equal to 91 degrees and less than or equal to 130 degrees.

[0015] In combination with the first aspect, in some possible embodiments, the distance between the edge line of the orthographic projection of the second portion on the substrate close to the third isolation opening and the edge line of the orthographic projection of the second surface on the substrate close to the third isolation opening is greater than or equal to 8000 angstroms and less than or equal to 10000 angstroms.

[0016] In combination with the first aspect, in some possible embodiments, the isolation structure also includes a third part, the third part is located on the side of the first part close to the substrate, and the orthographic projection of the second surface on the substrate is located within the orthographic projection of the third part on the substrate; preferably, the orthographic projection of the second surface on the substrate and the orthographic projection of the third part on the substrate coincide with each other; preferably, the material of the first part is aluminum, copper or silver; preferably, the height of the first part is greater than or equal to 6000 angstroms and less than or equal to 9000 angstroms; preferably, the material of the second part is titanium or molybdenum; preferably, the material of the third part is molybdenum or titanium.

[0017] In combination with the first aspect, in some possible embodiments, the sub-pixel includes a stacked first electrode, a second electrode, and a light-emitting functional layer located between the first electrode and the second electrode, the second electrode is located on the side of the first electrode away from the substrate, and the light-emitting functional layer and the first part are spaced apart; preferably, the second electrode and the first part overlap.

[0018] In combination with the first aspect, some possible embodiments further include an inorganic packaging part, which is located on the side of the second electrode facing away from the substrate and extends to the side of the isolation structure facing away from the substrate, and the orthographic projection of the inorganic packaging part on the substrate covers the orthographic projection of the second electrode on the substrate; preferably, the multiple inorganic packaging parts are arranged at intervals; preferably, the multiple inorganic packaging parts correspond to the multiple sub-pixels one by one.

[0019] In combination with the first aspect, in some possible embodiments, it further includes an organic encapsulation layer, which is located on the side of the inorganic encapsulation part away from the substrate, and the orthographic projection of the organic encapsulation layer on the substrate covers the orthographic projection of the inorganic encapsulation part on the substrate; preferably, the display panel also includes an inorganic encapsulation layer, which is located on the side of the organic encapsulation layer away from the substrate, and the orthographic projection of the inorganic encapsulation layer on the substrate covers the orthographic projection of the organic encapsulation layer on the substrate.

[0020] In combination with the first aspect, in some possible embodiments, it also includes a pixel definition layer, which is located on the side of the isolation structure facing the substrate, and the pixel definition layer encloses a pixel opening, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection range of the isolation opening on the substrate; preferably, the material of the pixel definition layer is an inorganic material.

[0021] The second aspect of the present application provides a display panel. The display panel includes a substrate, an isolation structure, and a plurality of sub-pixels. The isolation structure is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings. The isolation structure includes a first portion and a second portion, and the first portion is located on a side of the second portion close to the substrate. In a cross-sectional direction perpendicular to the substrate, the first portion includes a first side edge and a second side edge that are opposite to each other, and the angle between the first side edge and a direction parallel to the substrate is different from the angle between the second side edge and a direction opposite to the direction parallel to the substrate; the sub-pixel is located in the isolation opening.

[0022] The third aspect of the present application provides a method for preparing a display panel. The preparation method includes: preparing a plurality of first electrodes on one side of a substrate; preparing an isolation material layer on the side of the first electrode facing away from the substrate, and patterning the isolation material layer multiple times to form an isolation structure and a plurality of isolation openings formed by the isolation structure, wherein the plurality of isolation openings include a first isolation opening; the isolation structure includes a first part and a second part, the first part is located on the side of the second part close to the substrate, and the orthographic projection of the first part on the substrate is located within the orthographic projection range of the second part on the substrate; the first part has a first surface facing the second part and a second surface facing away from the second part; the edge line of the orthographic projection of the first surface on the substrate close to the first isolation opening is located outside the orthographic projection of the second surface on the substrate; and the light-emitting functional layer, the second electrode and the inorganic encapsulation part are sequentially prepared in the isolation opening.

[0023] In combination with the third aspect, in some possible implementations, an isolation material layer is prepared on the side of the first electrode facing away from the substrate, and the isolation material layer is patterned multiple times to form an isolation structure and a plurality of isolation openings enclosed by the isolation structure, including: preparing an isolation material layer on the side of the first electrode facing away from the substrate; performing a first patterning on the isolation material layer through a first mask to obtain a first isolation opening; performing a second patterning on the isolation material layer through a second mask to obtain a second isolation opening; an edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening is located outside the orthographic projection of the second surface on the substrate, or the orthographic projection of the second surface on the substrate close to the second isolation opening An edge line near the second isolation opening is located outside the orthographic projection of the first surface on the substrate; the isolation material layer is thirdly patterned through a third mask to obtain a third isolation opening; an edge line of the orthographic projection of the second surface on the substrate close to the third isolation opening is located outside the orthographic projection of the first surface on the substrate; preferably, sequentially preparing a light-emitting functional layer, a second electrode and an inorganic packaging part in the isolation opening includes: sequentially preparing a light-emitting material layer, a second electrode material layer and an inorganic packaging material layer on a side of the second part facing away from the substrate, and patterning the inorganic packaging material layer, the second electrode material layer and the light-emitting material layer to obtain a light-emitting functional layer, a second electrode and an inorganic packaging part.

[0024] A fourth aspect of the present application provides a display device, comprising the above-mentioned display panel, or a display panel obtained by the above-mentioned preparation method.

[0025] According to the display panel, preparation method thereof and display device provided by the embodiments of the present application, by setting the orthographic projection of the first surface of the first part of the isolation structure on the substrate to be close to the edge line of the first isolation opening and located outside the orthographic projection of the second surface on the substrate, the light-emitting structure layer in the first isolation opening is prevented from overlapping with the first part, and lateral leakage of the display panel is prevented. The overlapping area between the second electrode and the first part in the first isolation opening can also be increased, thereby improving the yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1a It is a schematic diagram of a partial cross-sectional structure of a display panel provided in the first embodiment of the present application.

[0027] Figure 1b yes Figure 1a A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0028] Figure 1c yes Figure 1b A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0029] Figure 1d yes Figure 1a Another partial cross-sectional structural schematic diagram of a display panel is shown.

[0030] Figure 1e yes Figure 1d A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0031] Figure 2a It is a schematic diagram of a partial cross-sectional structure of a display panel provided in the second embodiment of the present application.

[0032] Figure 2b yes Figure 2a A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0033] Figure 2c yes Figure 2b A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0034] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a display panel provided in the third embodiment of the present application.

[0035] Figure 4a It is a schematic diagram of the cross-sectional structure of a display panel provided in the fourth embodiment of the present application.

[0036] Figure 4b yes Figure 4a A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0037] Figure 4c yes Figure 4b A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0038] Figure 5 It is a schematic diagram of a partial cross-sectional structure of a display panel provided in the fifth embodiment of the present application.

[0039] Figure 6 It is a flow chart of a method for preparing a display panel provided in one embodiment of the present application.

[0040] Figure 7a-7c It is a schematic diagram of the structure of an intermediate product obtained during the execution of the preparation method provided in the first embodiment of the present application.

[0041] Figure 8 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0042] In the process of realizing the present invention, the inventors found the following problems in the related art: With the rapid development of display technology, the panel size is no longer limited by the fine metal mask. As one of the alternative technical means, an isolation structure is usually set in the display panel to isolate the film layer evaporated on the isolation structure, such as the organic light-emitting functional layer and cathode layer of the adjacent light-emitting device, so that the preparation process of the display panel does not need to use a fine metal mask. However, when the light-emitting structure layer of the existing display panel is evaporated, the light-emitting structure layer is easy to overlap with the isolation structure, causing lateral leakage, which affects the yield of the display panel.

[0043] In view of this, the display panel, the preparation method thereof, and the display device provided in the embodiments of the present application, according to the display panel, the preparation method thereof, and the display device provided in the embodiments of the present application, by setting the edge line of the orthographic projection of the first surface of the first part of the isolation structure on the substrate close to the first isolation opening and located outside the orthographic projection of the second surface on the substrate, the light-emitting structure layer in the first isolation opening is prevented from overlapping with the first part, and lateral leakage of the display panel is prevented. The overlapping area between the second electrode and the first part in the first isolation opening can also be increased, thereby improving the yield of the display panel.

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is understood that when a structure is referred to as being "on or under" another structure, the structure may be directly on or under the other structure, or there may be intermediate structures. The same reference numerals always indicate the same structure. The structures mentioned herein include any of a film layer, an element, a device, a component, and an assembly.

[0046] When a structure is referred to as being “connected” to another structure, the structure may be directly connected to the other structure or indirectly connected to the other structure with one or more intermediate structures interposed therebetween.

[0047] Patent CN118251982A, Patent 202410864269.8, Patent PCT / CN2024 / 098407, Patent PCT / CN2024 / 102783, Patent PCT / CN2024 / 098217, Patent

[0048] PCT / CN2024 / 099419, patent PCT / CN2024 / 099072, patent CN117979755A, patent CN117998900A, patent CN117062489A, patent CN117580403A, patent CN116583155A, patent CN116669477A, ​​patent CN117396039A, patent CN116669480A, patent CN116600606A, and patent CN117500332A record relevant technical solutions for isolation structure and encapsulation layer, and their contents are incorporated into this application by reference for reference.

[0049] Figure 1a is a schematic diagram of a partial cross-sectional structure of a display panel provided in the first embodiment of the present application, Figure 1b yes Figure 1a The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 1a and Figure 1b As shown, the display panel includes a substrate 11, an isolation structure 12 and a plurality of sub-pixels 13. The isolation structure 12 is located on one side of the substrate 11. The isolation structure 12 encloses a plurality of isolation openings Q, and the plurality of isolation openings Q include a first isolation opening Q1. The isolation structure 12 includes a first portion 121 and a second portion 122. The first portion 121 is located on the side of the second portion 122 close to the substrate 11. The orthographic projection of the first portion 121 on the substrate 11 is located within the orthographic projection range of the second portion 122 on the substrate 11. The first portion 121 has a first surface 101 facing the second portion 122 and a second surface 102 facing away from the second portion 122. The edge line 1011 of the orthographic projection of the first surface 101 on the substrate 11 close to the first isolation opening Q1 is located outside the orthographic projection of the second surface 102 on the substrate 11. The sub-pixel 13 is located within the isolation opening Q.

[0050] Among them, the substrate 11 can be a substrate substrate. In some embodiments, the substrate substrate can be a glass-based substrate. In some embodiments, the substrate substrate can include an organic resin material such as epoxy resin, triazine, silicone resin or polyimide. For example, the substrate substrate can be an FR4 type printed circuit board (Printed circuit board, PCB), or it can be a flexible PCB that is easy to deform. In some embodiments, the substrate substrate can include a ceramic material such as silicon nitride, aluminum nitride or aluminum oxide, or include a metal or a metal compound. For example, the substrate substrate can be a metal core printed circuit board (Metal Core PCB, MCPCB) or a metal copper clad laminate (Metal Copper Clad Laminate, MCCL).

[0051] Furthermore, in one embodiment, the substrate 11 may have a driving circuit, which is used to drive multiple light-emitting devices 13 to emit light of corresponding colors. For example, the substrate 11 may include a substrate layer, a barrier layer (Barrier), a buffer layer (Buffer), a gate insulating layer (Gate Insulator, GI), a capacitor insulating layer (Capacitance Insulator, CI), a gate, a source and drain, an interlayer dielectric layer (Interlayer Dielectric, ILD), etc.

[0052] The sub-pixel 13 includes a first electrode 131 and a second electrode 132 which are stacked, and at least one light-emitting functional layer 133 located between the first electrode 131 and the second electrode 132, wherein the second electrode 132 is located on the side of the first electrode 131 away from the substrate 11. The first electrode 131 may be an anode, and the second electrode 132 may be a cathode. The at least one light-emitting functional layer 133 includes an emitting layer (EML), and may also include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron blocking layer (EBL) located between the anode and the emitting layer (EML), and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL) located between the cathode and the emitting layer (EML).

[0053] In one embodiment, the light-emitting functional layer 133 and the first portion 121 are spaced apart to avoid leakage caused by overlapping of the light-emitting functional layer 133 and the first portion 121 , thereby improving the yield of the display panel.

[0054] In one embodiment, the plurality of sub-pixels 13 include a first sub-pixel 1301 . The first sub-pixel 1301 is located in the first isolation opening Q1 . Exemplarily, the first sub-pixel 1301 is a red sub-pixel.

[0055] The isolation structure 12 can isolate the light-emitting functional layer 133 and the second electrode 132 of multiple sub-pixels 13. In one embodiment, the first part 121 can be designed as an independent film layer, that is, there is no physical interface inside the first part 121, and each part is composed of the same material, for example, the material of the first part 121 is aluminum, copper or silver. Alternatively, the first part 121 can be designed to be composed of at least two film layers stacked. For example, the first part 121 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum, respectively, and the conductive film layer composed of molybdenum is located between the substrate 11 and the conductive film layer composed of aluminum. Exemplarily, the first part 121 includes a conductive part, or the first part 121 itself is a conductive structure. The first part 121 and the second electrode 132 of the sub-pixel 13 are overlapped so that the second electrodes 132 of adjacent sub-pixels 13 are electrically connected to each other, thereby realizing a full-surface cathode. The material of the second part 122 can be an organic material or an inorganic material or a metal material, such as molybdenum or titanium. In the case where the second portion 122 is a metal material, the material of the second portion 122 may be titanium.

[0056] In one embodiment, the height H of the first portion 121 is greater than or equal to 6000 angstroms and less than or equal to 9000 angstroms. For example, the height H of the first portion 121 may be 6000 angstroms, 7000 angstroms, 8000 angstroms, 9000 angstroms, or the like.

[0057] Figure 1c yes Figure 1b The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 1c As shown, in one embodiment, a distance L1 between an edge line 1011 of an orthographic projection of the first surface 101 on the substrate 11 close to the first isolation opening Q1 and an edge line 1021 of an orthographic projection of the second surface 102 on the substrate 11 close to the first isolation opening Q1 is greater than or equal to 890 angstroms and less than or equal to 8400 angstroms. For example, a distance L1 between an edge line 1011 of an orthographic projection of the first surface 101 on the substrate 11 close to the first isolation opening Q1 and an edge line 1021 of an orthographic projection of the second surface 102 on the substrate 11 close to the first isolation opening Q1 may be 890 angstroms, 1000 angstroms, 5000 angstroms, 8400 angstroms, etc.

[0058] Further in one embodiment, the first portion 121 has a first side wall 1211 close to the first isolation opening Q1, and the angle a between the first side wall 1211 and the direction parallel to the substrate 11 is greater than or equal to 50 degrees and less than or equal to 85 degrees. For example, the angle a between the first side wall 1211 and the direction parallel to the substrate 11 can be 50 degrees, 60 degrees, 75 degrees, 85 degrees, etc.

[0059] Further in one embodiment, the first side wall 1211 is a smooth surface.

[0060] Further in one embodiment, a distance L2 between an edge line 1221 of an orthographic projection of the second portion 122 on the substrate 11 close to the first isolation opening Q1 and an edge line 1021 of an orthographic projection of the second surface 102 on the substrate 11 close to the first isolation opening Q1 is greater than or equal to 4000 angstroms and less than or equal to 6000 angstroms. For example, a distance L2 between an edge line 1221 of an orthographic projection of the second portion 122 on the substrate 11 close to the first isolation opening Q1 and an edge line 1021 of an orthographic projection of the second surface 102 on the substrate 11 close to the first isolation opening Q1 may be 4000 angstroms, 5000 angstroms, 6000 angstroms, etc.

[0061] Figure 1d yes Figure 1a Another partial cross-sectional structure schematic diagram of a display panel is shown in FIG. Figure 2a is a schematic diagram of a partial cross-sectional structure of a display panel provided in the second embodiment of the present application, Figure 2b yes Figure 2a The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 1d , Figure 2a , Figure 2b As shown, in one embodiment, the plurality of isolation openings Q further include a second isolation opening Q2, the plurality of sub-pixels 13 further include a second sub-pixel 1302, and the second sub-pixel 1302 is located in the second isolation opening Q2. Exemplarily, the second sub-pixel 1302 is a green sub-pixel.

[0062] Figure 1e yes Figure 1d The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 1e As shown, as one way, an edge line 1012 of the orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 is located outside the orthographic projection of the second surface 102 on the substrate 11 .

[0063] Further in one embodiment, a distance L3 between an edge line 1012 of an orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of an orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 is greater than or equal to 0 angstroms and less than or equal to 5860 angstroms. For example, a distance L3 between an edge line 1012 of an orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of an orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 can be 0 angstroms, 2000 angstroms, 4500 angstroms, 5860 angstroms, etc.

[0064] Further in one embodiment, the first portion 121 has a second side wall 1212 close to the second isolation opening Q2, and the angle b between the second side wall 1212 and the direction parallel to the substrate 11 is greater than or equal to greater than or equal to 60 degrees and less than or equal to 90 degrees. For example, the angle b between the second side wall 1212 and the direction parallel to the substrate 11 can be 60 degrees, 75 degrees, 90 degrees, etc.

[0065] Further in one embodiment, the second side wall 1212 is a smooth surface.

[0066] Figure 2c yes Figure 2b The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 2c As shown, as one way, the edge line 1022 of the orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 is located outside the orthographic projection of the first surface 101 on the substrate 11 .

[0067] Further in one embodiment, a distance L3 between an edge line 1012 of an orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of an orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 is greater than or equal to 0 angstroms and less than or equal to 2750 angstroms. For example, a distance L3 between an edge line 1012 of an orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of an orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 can be 0 angstroms, 500 angstroms, 1500 angstroms, 2750 angstroms, etc.

[0068] Further in one embodiment, the first portion 121 has a second side wall 1212 close to the second isolation opening Q2, and the angle b between the second side wall 1212 and the direction parallel to the substrate 11 is greater than or equal to greater than or equal to 90 degrees and less than or equal to 105 degrees. For example, the angle b between the second side wall 1212 and the direction parallel to the substrate 11 can be 90 degrees, 100 degrees, 105 degrees, etc.

[0069] Further in one embodiment, the second side wall 1212 is a smooth surface.

[0070] See also Figure 1e and Figure 2c, a distance L4 between an edge line 1222 of the second portion 122's orthographic projection on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of the second surface 102's orthographic projection on the substrate 11 close to the second isolation opening Q2 is greater than or equal to 6000 angstroms and less than or equal to 8000 angstroms. For example, a distance L4 between an edge line 1222 of the second portion 122's orthographic projection on the substrate 11 close to the second isolation opening Q2 and an edge line 1022 of the second surface 102's orthographic projection on the substrate 11 close to the second isolation opening Q2 can be 6000 angstroms, 7000 angstroms, 8000 angstroms, etc.

[0071] Please refer again Figure 1b In one embodiment, the isolation structure 12 further includes a third portion 123, which is located on the side of the first portion 121 close to the substrate 11, and the orthographic projection of the second surface 102 on the substrate 11 is located within the orthographic projection range of the third portion 123 on the substrate 11. The material of the third portion 123 is molybdenum or titanium. Exemplarily, the first portion 121 is a conductive film layer composed of aluminum, and the third portion 123 is a conductive film layer composed of molybdenum. In this case, the cross-section of the isolation structure 12 is I-shaped. Of course, in other embodiments, the third portion 123 is a conductive film layer composed of titanium.

[0072] Further in one embodiment, the orthographic projection of the second surface 102 on the substrate 11 coincides with the orthographic projection of the third portion 123 on the substrate 11 .

[0073] In one embodiment, the display panel further includes a pixel definition layer 14, the pixel definition layer 14 is located between the substrate 11 and the isolation structure 12, the pixel definition layer 14 encloses a pixel opening 141, and the orthographic projection of the pixel opening 141 on the substrate 11 is located within the orthographic projection range of the isolation opening Q on the substrate 11. The pixel opening 141 exposes at least a portion of the first electrode 131. Exemplarily, the material of the pixel definition layer 14 includes an inorganic material.

[0074] Optionally, the pixel definition layer 14 may be made of a light-transmitting material so that the light of the sub-pixel 13 can better pass through the pixel definition layer. Optionally, the pixel definition layer 14 may be made of an opaque material, which can improve the light absorption of the pixel definition layer 14, reduce the reflectivity of the display panel, further reduce the optical crosstalk between adjacent sub-pixels 13, and improve the display effect of the display panel.

[0075] In one embodiment, the display panel further includes an inorganic encapsulation portion 15, which is located on the side of the second electrode 132 away from the substrate 11 and extends to the side of the isolation structure 12 away from the substrate 11, and the orthographic projection of the inorganic encapsulation portion 15 on the substrate 11 covers the orthographic projection of the second electrode 132 on the substrate 11. Exemplarily, the material of the inorganic encapsulation portion 15 is silicon oxide, silicon oxynitride or silicon nitride, etc. The inorganic encapsulation portion 15 can be a single layer, a multi-layer, a composite layer, etc.

[0076] In one embodiment, there are a plurality of inorganic packaging parts 15 , and the plurality of inorganic packaging parts 15 are arranged at intervals.

[0077] In one embodiment, the plurality of inorganic encapsulation parts 15 correspond one-to-one to the plurality of sub-pixels 13 .

[0078] Figure 3 FIG. 1 is a schematic diagram of a partial cross-sectional structure of a display panel provided in the third embodiment of the present application. Figure 3 As shown, in one embodiment, the display panel further includes an organic encapsulation layer 16, which is located on the side of the inorganic encapsulation part 15 away from the substrate 11, and the orthographic projection of the organic encapsulation layer 16 on the substrate 11 covers the orthographic projection of the inorganic encapsulation part 15 on the substrate 11. Exemplarily, the material of the organic encapsulation layer 16 is a fiber material, a resin material, or a material for a laminated multilayer board, etc. The organic encapsulation layer 16 can be a single layer, a multilayer, a composite layer, etc.

[0079] The display panel further includes an inorganic encapsulation layer 17, which is located on the side of the organic encapsulation layer 16 away from the substrate 11, and the orthographic projection of the inorganic encapsulation layer 17 on the substrate 11 covers the orthographic projection of the organic encapsulation layer 16 on the substrate 11. Exemplarily, the material of the inorganic encapsulation layer 17 is silicon oxide, silicon oxynitride or silicon nitride, etc. The inorganic encapsulation layer 17 can be a single layer, a multi-layer, a composite layer, etc.

[0080] The display panel, preparation method thereof and display device provided in the embodiments of the present application. According to the display panel, preparation method thereof and display device provided in the embodiments of the present application, by setting the edge line of the orthographic projection of the first surface of the first part of the isolation structure on the substrate close to the first isolation opening and located outside the orthographic projection of the second surface on the substrate, the light-emitting structure layer in the first isolation opening is prevented from overlapping with the first part, and lateral leakage of the display panel is prevented. The overlapping area between the second electrode and the first part in the first isolation opening can also be increased, thereby improving the yield of the display panel.

[0081] Figure 4a is a schematic cross-sectional structure diagram of a display panel provided in a fourth embodiment of the present application, Figure 4b yes Figure 4a The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 4a and Figure 4b As shown, in one embodiment, the plurality of isolation openings Q further include a third isolation opening Q3, the plurality of sub-pixels 13 further include a third sub-pixel 1303, the third sub-pixel 1303 is located in the third isolation opening Q3, and illustratively, the third sub-pixel 1303 is a blue sub-pixel.

[0082] In the above embodiment, the first sub-pixel 1301 is a red sub-pixel, the second sub-pixel 1302 is a green sub-pixel, and the third sub-pixel 1303 is a blue sub-pixel. It should be understood that the present application does not limit the preparation order of the sub-pixels. For example, the first sub-pixel 1301 may be a blue sub-pixel, the second sub-pixel 1302 may be a green sub-pixel, and the third sub-pixel 1303 may be a red sub-pixel.

[0083] Figure 4c yes Figure 4b The partial cross-sectional structure diagram of the display panel is shown in FIG. Figure 4c As shown, in one embodiment, an edge line 1023 of the orthographic projection of the second surface 102 on the substrate 11 close to the third isolation opening Q3 is located outside the orthographic projection of the first surface 101 on the substrate 11 .

[0084] Further in one embodiment, a distance L5 between an edge line 1013 of the first surface 101's orthographic projection on the substrate 11 close to the third isolation opening Q3 and an edge line 1023 of the second surface 102's orthographic projection on the substrate 11 close to the third isolation opening Q3 is greater than or equal to 250 angstroms and less than or equal to 8400 angstroms. For example, a distance L5 between an edge line 1013 of the first surface 101's orthographic projection on the substrate 11 close to the third isolation opening Q3 and an edge line 1023 of the second surface 102's orthographic projection on the substrate 11 close to the third isolation opening Q3 may be 250 angstroms, 3500 angstroms, 5700 angstroms, 8400 angstroms, etc.

[0085] Further in one embodiment, the first portion 121 has a third side wall 1213 close to the third isolation opening Q3, and the angle c between the third side wall 1213 and the direction parallel to the substrate 11 is greater than or equal to greater than or equal to 91 degrees and less than or equal to 130 degrees. For example, the angle c between the third side wall 1213 and the direction parallel to the substrate 11 can be 91 degrees, 115 degrees, 130 degrees, etc.

[0086] Further in one embodiment, the third side wall 1213 is a smooth surface.

[0087] Further in one embodiment, a distance L6 between an edge line 1223 of the third isolation opening Q3 where the orthographic projection of the second portion 122 on the substrate 11 is close to and a distance L6 between an edge line 1023 of the third isolation opening Q3 where the orthographic projection of the second surface 102 on the substrate 11 is close to and ... can be 8000 angstroms, 9000 angstroms, 10000 angstroms, etc.

[0088] The display panel, preparation method and display device provided by the embodiment of the present application, according to the display panel, preparation method and display device provided by the embodiment of the present application, by setting the edge line of the orthographic projection of the first surface of the first part of the isolation structure on the substrate close to the first isolation opening to be outside the orthographic projection of the second surface on the substrate, the light-emitting structure layer in the first isolation opening is prevented from overlapping with the first part, and the display panel is prevented from generating lateral leakage, and the overlapping area between the second electrode and the first part in the first isolation opening can be increased, thereby improving the yield of the display panel. Furthermore, by setting the edge line of the orthographic projection of the second surface on the substrate close to the third isolation opening to be outside the orthographic projection of the first surface on the substrate, the isolation structure around the third isolation opening is prevented from being over-engraved after multiple patterning, thereby improving the overlapping effect of the second electrode and the first part in the third isolation opening.

[0089] Figure 5 FIG. 5 is a schematic diagram of a partial cross-sectional structure of a display panel provided in the fifth embodiment of the present application. Figure 5 As shown, the embodiment of the present application also provides a display panel. The display panel includes a substrate 11, an isolation structure 12 and a plurality of sub-pixels 13. The isolation structure 12 is located on one side of the substrate 11, and the isolation structure encloses a plurality of isolation openings Q. The isolation structure 12 includes a first portion 121 and a second portion 122. The first portion 121 is located on a side of the second portion 122 close to the substrate 11. In the cross-sectional direction perpendicular to the substrate 11, the first portion 121 includes a first side 1201 and a second side 1202 opposite to each other. The angle between the first side 1201 and the direction X parallel to the substrate 11 is different from the angle between the second side 1202 and the opposite direction parallel to the substrate direction X. The sub-pixel 13 is located in the isolation opening.

[0090] The display panel provided according to the embodiment of the present application and the display panel provided in the aforementioned embodiment of the present application belong to the same inventive concept, and have corresponding film layer structures and beneficial effects. Details not fully described in the embodiment of the display panel can be found in the embodiment of the aforementioned display panel, and will not be repeated here.

[0091] The embodiment of the present application also provides a method for preparing a display panel. Figure 6 1 is a flow chart of a method for preparing a display panel provided in an embodiment of the present application. The method is used to prepare a display panel provided in any of the above embodiments. Figure 6 As shown, the preparation method comprises:

[0092] Step S610, preparing a plurality of first electrodes on one side of the substrate.

[0093] Step S620, preparing an isolation material layer on the side of the first electrode facing away from the substrate, and patterning the isolation material layer multiple times to form an isolation structure and a plurality of isolation openings enclosed by the isolation structure, the plurality of isolation openings including a first isolation opening; the isolation structure includes a first portion and a second portion, the first portion is located on a side of the second portion close to the substrate, and the orthographic projection of the first portion on the substrate is located within the range of the orthographic projection of the second portion on the substrate; the first portion has a first surface facing the second portion and a second surface facing away from the second portion; an edge line of the orthographic projection of the first surface on the substrate close to the first isolation opening is located outside the orthographic projection of the second surface on the substrate.

[0094] Step S630, preparing a light-emitting functional layer, a second electrode and an inorganic encapsulation part in sequence in the isolation opening.

[0095] Figure 7a-7c Schematic diagram of the structure of the intermediate product obtained by executing the preparation method provided in the first embodiment of the present application. The preparation method specifically includes:

[0096] According to step S610, refer to Figure 7a , a plurality of first electrodes 131 are prepared on one side of the substrate 11 , and the plurality of first electrodes 131 are arranged at intervals.

[0097] According to step S620, refer to Figure 7b , an isolation material layer is prepared on the side of the first electrode 131 facing away from the substrate 11, and the isolation material layer is patterned multiple times to form an isolation structure 12 and a plurality of isolation openings Q enclosed by the isolation structure 12, and the plurality of isolation openings Q include a first isolation opening Q1. The isolation structure 12 includes a first portion 121 and a second portion 122, the first portion 121 is located on the side of the second portion 122 close to the substrate 11, and the orthographic projection of the first portion 121 on the substrate 11 is located within the orthographic projection of the second portion 122 on the substrate 11. The first portion 121 has a first surface 101 facing the second portion 122 and a second surface 102 facing away from the second portion 122, and an edge line 1011 of the orthographic projection of the first surface 101 on the substrate 11 close to the first isolation opening Q1 is located outside the orthographic projection of the second surface 102 on the substrate 11.

[0098] In one embodiment, an isolation material layer is prepared on the side of the first electrode 131 facing away from the substrate 11, and the isolation material layer is patterned multiple times to form an isolation structure 12 and a plurality of isolation openings Q enclosed by the isolation structure 12, including: preparing an isolation material layer on the side of the first electrode 131 facing away from the substrate 11. The isolation material layer is patterned for the first time by a first mask to obtain a first isolation opening Q1; the second isolation opening Q2 is patterned for the second time by a second mask, and an edge line 1012 of the orthographic projection of the first surface 101 on the substrate 11 close to the second isolation opening Q2 is located outside the orthographic projection of the second surface 102 on the substrate 11, or, an edge line of the orthographic projection of the second surface 102 on the substrate 11 close to the second isolation opening Q2 is located outside the orthographic projection of the first surface 101 on the substrate 11; the isolation material layer is patterned for the third time by a third mask to obtain a third isolation opening Q3, and an edge line 1023 of the orthographic projection of the second surface 102 on the substrate 11 close to the third isolation opening Q3 is located outside the orthographic projection of the first surface 101 on the substrate 11.

[0099] According to step S630, refer to Figure 7c A light-emitting material layer, a second electrode material layer and an inorganic packaging material layer are sequentially prepared on the side of the second part 122 away from the substrate 11, and the inorganic packaging material layer, the second electrode material layer and the light-emitting material layer are patterned to obtain a light-emitting functional layer 133, a second electrode 132 and an inorganic packaging part 15.

[0100] In one embodiment, the preparation method further includes the step of preparing an organic encapsulation layer and an inorganic encapsulation layer on a side of the inorganic encapsulation part 15 facing away from the substrate 11 .

[0101] Figure 8 is a schematic diagram of the structure of a display device provided by an embodiment of the present application. Figure 8 As shown, the display device is a product with an image display function. For example, the display device can be used to display static images, such as pictures or photos. The display device can also be used to display dynamic images, such as videos.

[0102] The display device can be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0103] The display device includes the display panel 100 provided by any of the above embodiments or the display panel 100 obtained by the preparation method provided by any of the above embodiments. The display panel 100 may be an organic light emitting diode display substrate or a quantum dot electroluminescent display substrate.

[0104] In addition, the display device may also have functions such as taking photos, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, and the like.

[0105] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0106] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: include: substrate; an isolation structure, located at one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the plurality of isolation openings including a first isolation opening; the isolation structure including a first portion and a second portion, the first portion being located at a side of the second portion close to the substrate, the orthographic projection of the first portion on the substrate being within the orthographic projection range of the second portion on the substrate; the first portion having a first surface facing the second portion and a second surface facing away from the second portion; An edge line of an orthographic projection of the first surface on the substrate close to the first isolation opening is located outside an orthographic projection of the second surface on the substrate; as well as A plurality of sub-pixels are located in the isolation opening.

2. The display panel according to claim 1, characterized in that: A distance between an edge line of an orthographic projection of the first surface on the substrate close to the first isolation opening and an edge line of an orthographic projection of the second surface on the substrate close to the first isolation opening is greater than or equal to 890 angstroms and less than or equal to 8400 angstroms; Preferably, the plurality of sub-pixels include a first sub-pixel, the first sub-pixel is located in the first isolation opening, and the first sub-pixel is a red sub-pixel.

3. The display panel according to claim 1, characterized in that: The first portion has a first side wall close to the first isolation opening, and an angle between the first side wall and a direction parallel to the substrate is greater than or equal to 50 degrees and less than or equal to 85 degrees; Preferably, the first side wall is a smooth surface.

4. The display panel according to claim 1, characterized in that: A distance between an edge line of an orthographic projection of the second portion on the substrate close to the first isolation opening and an edge line of an orthographic projection of the second surface on the substrate close to the first isolation opening is greater than or equal to 4000 angstroms and less than or equal to 6000 angstroms.

5. The display panel according to claim 1, characterized in that: The plurality of isolation openings further include a second isolation opening, and an edge line of an orthographic projection of the first surface on the substrate close to the second isolation opening is located outside the orthographic projection of the second surface on the substrate; Preferably, the distance between an edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening and an edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 0 angstroms and less than or equal to 5860 angstroms; Preferably, the first portion has a second side wall close to the second isolation opening, and an angle between the first side wall and the substrate is greater than or equal to 60 degrees and less than or equal to 90 degrees; Preferably, the second side wall is a smooth surface.

6. The display panel according to claim 1, characterized in that: The plurality of isolation openings further include a second isolation opening, and an edge line of an orthographic projection of the second surface on the substrate close to the second isolation opening is located outside the orthographic projection of the first surface on the substrate; Preferably, the distance between an edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening and an edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 0 angstroms and less than or equal to 2750 angstroms; Preferably, the first portion has a second side wall close to the second isolation opening, and an angle between the first side wall and the substrate is greater than or equal to 90 degrees and less than or equal to 105 degrees; Preferably, the second side wall is a smooth surface.

7. The display panel according to claim 5 or 6, characterized in that: A distance between an edge line of an orthographic projection of the second portion on the substrate close to the second isolation opening and an edge line of an orthographic projection of the second surface on the substrate close to the second isolation opening is greater than or equal to 6000 angstroms and less than or equal to 8000 angstroms; Preferably, the plurality of sub-pixels further include a second sub-pixel, the second sub-pixel is located in the second isolation opening, and the second sub-pixel is a green sub-pixel.

8. The display panel according to claim 1, characterized in that: The plurality of isolation openings further include a third isolation opening, and an edge line of an orthographic projection of the second surface on the substrate close to the third isolation opening is located outside the orthographic projection of the first surface on the substrate; Preferably, the plurality of sub-pixels further include a third sub-pixel, the third sub-pixel is located in the third isolation opening, and the third sub-pixel is a blue sub-pixel.

9. The display panel according to claim 8, characterized in that: A distance between an orthographic projection of the first surface on the substrate close to an edge line of the third isolation opening and an orthographic projection of the second surface on the substrate close to an edge line of the third isolation opening is greater than or equal to 250 angstroms and less than or equal to 8400 angstroms.

10. The display panel according to claim 8, characterized in that: The first portion has a third sidewall close to the third isolation opening, and an angle between the first sidewall and the substrate is greater than or equal to 91 degrees and less than or equal to 130 degrees; Preferably, the third side wall is a smooth surface.

11. The display panel according to claim 9, characterized in that: A distance between an edge line of an orthographic projection of the second portion on the substrate close to the third isolation opening and an edge line of an orthographic projection of the second surface on the substrate close to the third isolation opening is greater than or equal to 8000 angstroms and less than or equal to 10000 angstroms.

12. The display panel according to claim 1, characterized in that: The isolation structure further includes a third portion, the third portion is located on a side of the first portion close to the substrate, and an orthographic projection of the second surface on the substrate is located within an orthographic projection of the third portion on the substrate; Preferably, the orthographic projection of the second surface on the substrate coincides with the orthographic projection of the third portion on the substrate; Preferably, the material of the first part is aluminum, copper or silver; Preferably, the height of the first portion is greater than or equal to 6000 angstroms and less than or equal to 9000 angstroms; Preferably, the material of the second part is titanium or molybdenum; Preferably, the material of the third part is molybdenum or titanium.

13. The display panel according to claim 1, characterized in that: The sub-pixel comprises a first electrode and a second electrode stacked together, and a light-emitting functional layer located between the first electrode and the second electrode, the second electrode is located on a side of the first electrode away from the substrate, and the light-emitting functional layer is spaced apart from the first portion; Preferably, the second electrode and the first portion are overlapped.

14. The display panel according to claim 13, characterized in that: It also includes an inorganic packaging portion, the inorganic packaging portion is located on a side of the second electrode away from the substrate and extends to a side of the isolation structure away from the substrate, and the orthographic projection of the inorganic packaging portion on the substrate covers the orthographic projection of the second electrode on the substrate; Preferably, a plurality of the inorganic packaging parts are arranged at intervals; Preferably, the plurality of inorganic encapsulation parts correspond to the plurality of sub-pixels one-to-one.

15. The display panel according to claim 14, characterized in that: It also includes an organic encapsulation layer, which is located on the side of the inorganic encapsulation portion away from the substrate, and the orthographic projection of the organic encapsulation layer on the substrate covers the orthographic projection of the inorganic encapsulation portion on the substrate; Preferably, the display panel further comprises an inorganic encapsulation layer located on a side of the organic encapsulation layer away from the substrate, and an orthographic projection of the inorganic encapsulation layer on the substrate covers an orthographic projection of the organic encapsulation layer on the substrate.

16. The display panel according to claim 1, characterized in that: It also includes a pixel definition layer, which is located on the side of the isolation structure facing the substrate, the pixel definition layer encloses a pixel opening, and the orthographic projection of the pixel opening on the substrate is within the orthographic projection range of the isolation opening on the substrate; Preferably, the material of the pixel definition layer is an inorganic material.

17. A display panel, characterized in that: include: substrate; an isolation structure, located at one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first portion and a second portion, the first portion being located at a side of the second portion close to the substrate, the first portion comprising a first side edge and a second side edge opposite to each other in a cross-sectional direction perpendicular to the substrate, the angle between the first side edge and a direction parallel to the substrate being different from the angle between the second side edge and a direction opposite to the direction parallel to the substrate; as well as A plurality of sub-pixels are located in the isolation opening.

18. A method for preparing a display panel, characterized in that: include: Prepare a plurality of first electrodes on one side of the substrate; An isolation material layer is prepared on the side of the first electrode facing away from the substrate, and the isolation material layer is patterned multiple times to form an isolation structure and a plurality of isolation openings enclosed by the isolation structure, wherein the plurality of isolation openings include a first isolation opening; the isolation structure includes a first portion and a second portion, the first portion is located on a side of the second portion close to the substrate, and the orthographic projection of the first portion on the substrate is located within the orthographic projection range of the second portion on the substrate; the first portion has a first surface facing the second portion and a second surface facing away from the second portion; An edge line of an orthographic projection of the first surface on the substrate close to the first isolation opening is located outside an orthographic projection of the second surface on the substrate; A light-emitting functional layer, a second electrode and an inorganic encapsulation part are sequentially prepared in the isolation opening.

19. The preparation method according to claim 18, characterized in that: The step of preparing an isolation material layer on the side of the first electrode facing away from the substrate and patterning the isolation material layer multiple times to form an isolation structure and a plurality of isolation openings enclosed by the isolation structure includes: preparing an isolation material layer on a side of the first electrode facing away from the substrate; Performing a first patterning on the isolation material layer through a first mask to obtain the first isolation opening; The isolation material layer is secondly patterned by a second mask to obtain a second isolation opening; an edge line of the orthographic projection of the first surface on the substrate close to the second isolation opening is located outside the orthographic projection of the second surface on the substrate, or an edge line of the orthographic projection of the second surface on the substrate close to the second isolation opening is located outside the orthographic projection of the first surface on the substrate; The isolation material layer is thirdly patterned by a third mask to obtain a third isolation opening; an edge line of an orthographic projection of the second surface on the substrate close to the third isolation opening is located outside the orthographic projection of the first surface on the substrate; Preferably, the step of sequentially preparing a light-emitting functional layer, a second electrode and an inorganic encapsulation part in the isolation opening comprises: A light-emitting material layer, a second electrode material layer and an inorganic packaging material layer are sequentially prepared on the side of the second part away from the substrate, and the inorganic packaging material layer, the second electrode material layer and the light-emitting material layer are patterned to obtain the light-emitting functional layer, the second electrode and the inorganic packaging part.

20. A display device, characterized in that: A display panel comprising any one of claims 1 to 17, or a display panel obtained by the preparation method of claims 18 to 19.

Images