Display panel, preparation method thereof and display device

Abstract

The application provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first part and a second part, the second part comprising a first surface and a second surface, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, the first isolation opening having a first sub-side and a second sub-side, the second isolation opening having a third sub-side and a fourth sub-side, the second part further comprising a first sub-side surface located on the first sub-side and facing the first isolation opening and a third sub-side surface located on the third sub-side and facing the second isolation opening, an angle between the first sub-side surface and the first surface being a first angle, an angle between the third sub-side surface and the first surface being a second angle, the first angle being an obtuse angle, and the first angle being greater than the second angle. The technical scheme of the application can increase the overlap area, reduce the overlap impedance, and improve the display effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the advancement of display technology, organic light-emitting diodes (OLEDs), with their advantages of low power consumption, high brightness, wide viewing angle, and high contrast, have become a common display screen for electronic devices such as mobile phones, tablets, smart TVs, and smart wearables. Traditionally, in the production of display panels, pixel patterning is typically achieved using a fine metal mask (FMM). While FMM technology is mature and boasts extensive mass production experience, it also suffers from limitations such as limited precision, high development costs, and long development cycles. The use of a fine metal mask-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe the non-fine metal mask technology for reference.

[0003] However, current display panels still have some problems when displaying. Summary of the Invention

[0004] In order to solve the above problems, embodiments of the present application provide a display panel, a method for manufacturing the same, and a display device.

[0005] In a first aspect, an embodiment of the present application provides a display panel comprising: a substrate; an isolation structure located on 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 stacked in sequence in a direction away from the substrate, the orthographic projection of the first portion on the substrate being within the orthographic projection of the second portion on the substrate, the second portion comprising a first surface close to the substrate and a second surface away from the substrate, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, the first isolation opening having a first sub-side and a second sub-side arranged oppositely, the second isolation opening having a third sub-side and a fourth sub-side arranged oppositely, the second portion further comprising a first sub-side surface located on the first sub-side and facing the first isolation opening, and a third sub-side surface located on the third sub-side and facing the second isolation opening, the angle between the first sub-side surface and the first surface being a first angle, the angle between the third sub-side surface and the first surface being a second angle, the first angle being an obtuse angle, and the first angle being greater than the second angle.

[0006] In combination with the first aspect, the second part also includes a second sub-side surface located on the second sub-side and facing the first isolation opening, the angle between the second sub-side surface and the first surface is a third angle, and the third angle is an obtuse angle; preferably, the third angle is equal to the first angle; preferably, the second part also includes a fourth sub-side surface located on the fourth sub-side and facing the second isolation opening, the angle between the fourth sub-side surface and the first surface is a fourth angle, and the fourth angle is smaller than the first angle; preferably, the fourth angle is equal to the second angle; preferably, the second angle and / or the fourth angle is a right angle or an obtuse angle; preferably, the first sub-side and the second sub-side are arranged relative to each other along the first direction, and / or the third sub-side and the fourth sub-side are arranged relative to each other along the first direction.

[0007] In combination with the first aspect, the multiple isolation openings also include a third isolation opening, the third isolation opening has a fifth sub-side and a sixth sub-side arranged opposite to each other, the second part also includes a fifth sub-side surface located on the fifth sub-side and facing the third isolation opening, and a sixth sub-side surface located on the sixth sub-side and facing the third isolation opening, the angle between the fifth sub-side surface and the first surface is the fifth angle, the angle between the sixth sub-side surface and the first surface is the sixth angle, and the fifth angle is smaller than the second angle; preferably, the fifth angle is equal to the sixth angle; preferably, the fifth angle and / or the sixth angle is an acute angle or an obtuse angle; preferably, the fifth sub-side and the sixth sub-side are arranged opposite to each other along the first direction; preferably, the first isolation opening, the second isolation opening and the third isolation opening are repeated in sequence along the first direction.

[0008] In combination with the first aspect, the cross-sectional shape of the second portion of the isolation structure located between the first isolation opening and the second isolation opening in the direction perpendicular to the substrate includes an inverted trapezoid, the cross-sectional shape of the second portion of the isolation structure located between the second isolation opening and the third isolation opening in the direction perpendicular to the substrate includes a regular trapezoid, and the cross-sectional shape of the second portion of the isolation structure located between the third isolation opening and the first isolation opening in the direction perpendicular to the substrate includes a parallelogram; preferably, the inverted trapezoid includes a right trapezoid; and / or, the regular trapezoid includes a right trapezoid.

[0009] In combination with the first aspect, the distance between the orthographic projection of the side wall of the first portion located on the first sub-side and facing the first isolation opening on the substrate and the orthographic projection of the first sub-side surface on the substrate is greater than the distance between the orthographic projection of the side wall of the first portion located on the third sub-side and facing the second isolation opening on the substrate and the orthographic projection of the third sub-side surface on the substrate; the distance between the orthographic projection of the side wall of the first portion located on the third sub-side and facing the second isolation opening on the substrate and the orthographic projection of the third sub-side surface on the substrate is greater than the distance between the orthographic projection of the side wall of the first portion located on the fifth sub-side and facing the third isolation opening on the substrate and the orthographic projection of the fifth sub-side surface on the substrate.

[0010] In combination with the first aspect, the display panel also includes a plurality of light-emitting units, at least part of which is located in the isolation opening, and the light-emitting unit includes a first electrode, and the first electrode overlaps the isolation structure on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps the first part on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps the isolation structure on the second sub-side, the fourth sub-side or the sixth sub-side; preferably, the first electrode overlaps the first part on the second sub-side, the fourth sub-side or the sixth sub-side.

[0011] In combination with the first aspect, the isolation structure also includes a third part, which is located on the side of the first part close to the substrate, and the orthographic projection of the first part on the substrate is located within the orthographic projection of the third part on the substrate; preferably, the first electrode overlaps the third part on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps the third part on the second sub-side, the fourth sub-side or the sixth sub-side; preferably, the material of the first part includes aluminum; and / or, the material of the second part includes titanium; and / or, the material of the third part includes molybdenum.

[0012] In combination with the first aspect, the display panel further includes a pixel definition layer, which encloses a plurality of pixel openings, and the orthographic projection of the pixel opening on the substrate overlaps with the orthographic projection of the isolation opening on the substrate; preferably, the pixel definition layer is located between the substrate and the isolation structure, or the pixel definition layer is provided with a clearance opening, and the isolation structure is located within the clearance opening; preferably, the light-emitting unit further includes a second electrode and a light-emitting functional layer, and the second electrode, the light-emitting functional layer and the first electrode are stacked in sequence in a direction away from the substrate, and the pixel opening exposes part of the second electrode; preferably, the display panel further includes a first encapsulation layer, and the first encapsulation layer includes a plurality of encapsulation units, and the encapsulation units correspond to the light-emitting units, and the orthographic projection of the encapsulation units on the substrate overlaps with the orthographic projection of the light-emitting units on the substrate; preferably, the display panel further includes a second encapsulation layer and a third encapsulation layer which are stacked in sequence in a direction away from the substrate, and the second encapsulation layer is located on the side of the first encapsulation layer facing away from the substrate.

[0013] In the second aspect, an embodiment of the present application also provides a display panel, comprising: a substrate; an isolation structure located on 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 stacked in sequence in a direction away from the substrate, the plurality of isolation openings comprising a first isolation opening, a second isolation opening and a third isolation opening that are repeatedly arranged in sequence, the second portion of the isolation structure between the first isolation opening and the second isolation opening comprising an inverted trapezoid in a cross-sectional shape perpendicular to the direction of the substrate, the second portion of the isolation structure between the second isolation opening and the third isolation opening comprising a regular trapezoid in a cross-sectional shape perpendicular to the direction of the substrate, and the second portion of the isolation structure between the third isolation opening and the first isolation opening comprising a parallelogram in a cross-sectional shape perpendicular to the direction of the substrate.

[0014] In combination with the second aspect, the inverted trapezoid includes a right-angled trapezoid, and / or the regular trapezoid includes a right-angled trapezoid.

[0015] In combination with the second aspect, the distance between the orthographic projection of the first portion between the first isolation opening and the second isolation opening toward the side wall of the first isolation opening and the orthographic projection of the second portion between the first isolation opening and the second isolation opening toward the side wall of the first isolation opening is greater than the distance between the orthographic projection of the first portion between the first isolation opening and the second isolation opening toward the side wall of the second isolation opening and the orthographic projection of the second portion between the first isolation opening and the second isolation opening toward the side wall of the second isolation opening; and / or the distance between the orthographic projection of the first portion between the second isolation opening and the third isolation opening toward the side wall of the second isolation opening and the orthographic projection of the second portion between the second isolation opening and the third isolation opening toward the side wall of the second isolation opening. The distance is greater than the distance between the orthographic projection of the side wall of the first portion between the second isolation opening and the third isolation opening toward the third isolation opening and the orthographic projection of the side wall of the second portion between the second isolation opening and the third isolation opening toward the third isolation opening on the substrate; and / or the distance between the orthographic projection of the side wall of the first portion between the third isolation opening and the first isolation opening toward the third isolation opening and the orthographic projection of the side wall of the second portion between the third isolation opening and the first isolation opening toward the third isolation opening on the substrate is smaller than the distance between the orthographic projection of the side wall of the first portion between the third isolation opening and the first isolation opening toward the first isolation opening and the orthographic projection of the side wall of the second portion between the third isolation opening and the first isolation opening toward the first isolation opening on the substrate.

[0016] In combination with the second aspect, the first isolation opening, the second isolation opening and the third isolation opening are repeatedly arranged in sequence along the first direction; preferably, the first isolation opening includes a first sub-side and a second sub-side arranged opposite to each other along the first direction, the second isolation opening includes a third sub-side and a fourth sub-side arranged opposite to each other along the first direction, and the third isolation opening includes a fifth sub-side and a sixth sub-side arranged opposite to each other along the first direction; the second part includes a first surface close to the substrate and a second surface away from the substrate, the second part also includes a first sub-side surface located on the first sub-side and facing the first isolation opening, a third sub-side surface located on the third sub-side and facing the second isolation opening, and a fifth sub-side surface located on the fifth sub-side and facing the third isolation opening, the angle between the first sub-side surface and the first surface is the first angle, the angle between the third sub-side surface and the first surface is the second angle, and the angle between the fifth sub-side surface and the first surface is the second angle. The angle between them is the fifth angle, the first angle is greater than the second angle, and the second angle is greater than the fifth angle; preferably, the first angle is an obtuse angle, and / or the second angle is a right angle or an obtuse angle, and / or the fifth angle is an acute angle or an obtuse angle; preferably, the second part also includes a second sub-side surface located on the second sub-side and facing the first isolation opening, the angle between the second sub-side surface and the first surface is the third angle, and the third angle is equal to the first angle; preferably, the second part also includes a fourth sub-side surface located on the fourth sub-side surface and facing the second isolation opening, the angle between the fourth sub-side surface and the first surface is the fourth angle, the fourth angle is smaller than the first angle, and the fourth angle is equal to the second angle; preferably, the second part also includes a sixth sub-side surface located on the sixth sub-side surface and facing the third isolation opening, the angle between the sixth sub-side surface and the first surface is the sixth angle, and the sixth angle is equal to the fifth angle.

[0017] In a third aspect, an embodiment of the present application also provides a method for preparing a display panel, comprising: preparing an isolation structure on a substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first portion and a second portion stacked in sequence in a direction away from the substrate, the orthographic projection of the first portion on the substrate being within the orthographic projection of the second portion on the substrate, the second portion comprising a first surface close to the substrate and a second surface away from the substrate, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, the first isolation opening having a first sub-side and a second sub-side arranged oppositely, the second isolation opening having a third sub-side and a fourth sub-side arranged oppositely, the second portion further comprising a first sub-side surface located on the first sub-side and facing the first isolation opening, and a third sub-side surface located on the third sub-side and facing the second isolation opening, the angle between the first sub-side surface and the first surface being a first angle, the angle between the third sub-side surface and the first surface being a second angle, the first angle being an obtuse angle, and the first angle being greater than the second angle.

[0018] In combination with the third aspect, an isolation structure is prepared on a substrate, including: sequentially preparing a first material layer and a second material layer on the substrate; performing a first patterning treatment on the second material layer to obtain a second middle portion; performing a second patterning treatment on the second middle portion to obtain a second portion; performing a third patterning treatment on the first material layer to obtain a first portion; preferably, after preparing the isolation structure, the preparation method further includes: preparing a first electrode in the first isolation opening, and / or preparing a first electrode in the second isolation opening, wherein, when preparing the first electrode in the first isolation opening, the angle between the evaporation direction of the evaporation source and the direction perpendicular to the substrate is smaller than the angle between the first sub-side surface and the direction perpendicular to the substrate.

[0019] In a fourth aspect, an embodiment of the present application further provides a display device, comprising the above-mentioned display panel, or comprising a display panel prepared according to the above-mentioned method.

[0020] With the above technical solution, since the light-emitting units are fabricated in stages, the sidewalls (primarily aluminum sidewalls) of the isolation structure within the isolation openings corresponding to the later-fabricated light-emitting units are over-etched. This makes it difficult to ensure that the cathode material is evaporated onto the sidewalls of the isolation structure during the vapor deposition of the first electrode material (cathode material). In this solution, the second portions corresponding to different isolation openings have different shapes, and the first angle of the second portion of the isolation opening corresponding to the later-fabricated light-emitting unit is an obtuse angle. This makes it easier for the cathode material to be evaporated onto the sidewalls of the isolation structure during vapor deposition, increasing the overlap area between the first electrode and the isolation structure, enhancing the continuity of the cathode, reducing the overlap impedance, and improving the display effect. Furthermore, in this solution, the overlap area of ​​different isolation openings can be ensured to be substantially the same, further improving display uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2 is a schematic diagram of the cross-sectional structure of a display panel provided in one embodiment of the present application.

[0022] Figure 2 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0023] Figure 3 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0024] Figure 4 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0025] Figure 5 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0026] Figure 6 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0027] Figure 7 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0028] Figure 8 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application.

[0029] Figure 9 1 is a flow chart of a method for manufacturing a display panel provided in one embodiment of the present application.

[0030] Figure 10 2 is a schematic structural diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] When preparing a display panel, the functional film layer in the light-emitting unit needs to be formed by evaporation. When using a fine metal mask (FMM) to evaporate the functional film layer, multiple alignments are required. In order to solve the position offset caused by alignment errors, sufficient space needs to be reserved between different light-emitting units. This makes the aperture ratio of the light-emitting unit low, making it difficult to increase the pixel density of the display panel.

[0033] In this application, there is no need to use a mask. A full-surface evaporation process is used to individually evaporate and package light-emitting units of different colors (also called different sub-pixels). There is no need to consider the alignment accuracy during evaporation. Therefore, the gap between light-emitting units can be designed to be smaller, thereby increasing the pixel density. In this method, an isolation structure is set between adjacent light-emitting units. The isolation structure can isolate the adjacent light-emitting units, and the cathode is overlapped on the isolation structure to achieve full-surface conduction, thereby reducing the voltage drop (IR Drop). However, after research, this application found that the cathode overlap area is small and the overlap impedance is large, which can easily lead to display abnormalities.

[0034] In response to the above technical problems, an embodiment of the present application provides a display panel comprising a substrate, an isolation structure, and a plurality of light-emitting units. The isolation structure is located on one side of the substrate and encloses a plurality of isolation openings, each of which has a first side and a second side disposed opposite each other. The isolation structure comprises a first portion and a second portion stacked sequentially in a direction away from the substrate, wherein the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate. The second portion comprises a first surface proximal to the substrate, a second surface distal to the substrate, a first side surface located on the first side and facing the isolation opening, and a second side surface located on the second side and facing the isolation opening, with the angle between the first side surface and the first surface being an obtuse angle. At least a portion of the light-emitting unit is located within the isolation opening, and the light-emitting unit comprises a first electrode, which overlaps the isolation structure on a first side. Optionally, the first electrode overlaps the first portion of the isolation structure. Overlapping refers to electrical connection between the first electrode and the isolation structure. In the embodiment of the present application, by setting the angle between the first side surface and the first surface to an obtuse angle, cathode material is more easily deposited onto the sidewalls of the isolation structure during evaporation, thereby increasing the overlapping area between the first electrode and the isolation structure, increasing cathode continuity, reducing overlapping impedance, and improving display quality.

[0035] Figure 1 FIG is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present application. Figure 1 As shown, the display panel includes a substrate 10 , an isolation structure 40 , and a plurality of light-emitting units 30 .

[0036] In the embodiment of the present application, the substrate 10 may include a substrate and a circuit layer (not shown) formed on the substrate. The substrate may be a rigid substrate, such as a glass substrate, or a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), or polyethylene naphthalate (PEN). The circuit layer may include multiple wiring layers and dielectric layers separating the wiring layers. Pixel circuits may be formed in the circuit layer.

[0037] The isolation structure 40 is located on one side of the substrate 10. The isolation structure 40 encloses a plurality of isolation openings 401. The isolation openings 401 have a first side 4011 and a second side 4012 that are opposite to each other. The first side 4011 and the second side 4012 are arranged along the first direction ( Figure 1The first portion 410 and the second portion 420 are arranged relative to each other in the x-direction in the first direction. Optionally, the first direction corresponds to the scanning direction during evaporation. The isolation structure 40 includes a first portion 410 and a second portion 420 stacked in sequence in a direction away from the substrate 10, and the orthographic projection of the first portion 410 on the substrate 10 is located within the orthographic projection of the second portion 420 on the substrate 10. The material of the first portion 410 includes aluminum, and the material of the second portion 420 includes titanium. The second portion 420 includes a first surface 423 close to the substrate 10, a second surface 424 away from the substrate 10, a first side surface 421 located on the first side 4011 and facing the isolation opening 401, and a second side surface 422 located on the second side 4012 and facing the isolation opening 401. In an embodiment of the present application, the angle α between the first side surface 421 and the first surface 423 is an obtuse angle. As a result, compared to conventional isolation structures 40 (in which the cross-sectional shape of the second portion is a regular trapezoid), when evaporating the cathode material, the cathode material is more easily deposited onto the sidewalls of the isolation structure 40 (specifically, the sidewalls of the first portion 410). This increases the overlap area between the first electrode 330 and the isolation structure 40, enhances cathode continuity, reduces overlap resistance, and improves display quality. The isolation structure 40 in the embodiment of the present application can increase the overlap area between the first electrode 330 and the isolation structure 40, reduce overlap resistance, and improve dark spots or gray spots caused by overlap.

[0038] At least a portion of the light-emitting unit 30 is located within the isolation opening 401. Optionally, the light-emitting unit 30 includes a first electrode 330, which overlaps the isolation structure 40 (e.g., the first portion 410) on the first side 4011. The first electrode 330 does not overlap the isolation structure 40 (e.g., the first portion 410) on the second side 4012. In other words, for single-sided overlap, it is sufficient to ensure that the angle α between the first side surface 421 and the first surface 423 is an obtuse angle and that the first electrode 330 overlaps the isolation structure 40 (e.g., the first portion 410) on the first side 4011. Here, overlapping means that the first electrode 330 is electrically connected to the isolation structure 40. When evaporating the cathode material, the evaporation source is tilted toward the first side 4011, so that the evaporated first electrode 330 overlaps the isolation structure 40 (e.g., the first portion 410) on the first side 4011.

[0039] In the embodiment of the present application, the angle β between the second side surface 422 and the first surface 423 is not limited.

[0040] For example, in Figure 1, the angle β between the second side surface 422 and the first surface 423 is an acute angle, and the orthographic projection of the first surface 423 on the substrate 10 partially overlaps with the orthographic projection of the second surface 424 on the substrate 10. The first side surface 421 and the second side surface 422 may be parallel or non-parallel, and the embodiment of the present application is not limited thereto. When the first side surface 421 and the second side surface 422 are parallel, the sum of the angle α and the angle β is 180°. Optionally, the isolation structure 40 includes a plurality of isolation openings 401 arranged along the first direction, and the isolation structure between two adjacent isolation openings 401 (for example, Figure 1 The cross-sectional shape of the second portion 420 of the isolation structure 41 in the direction perpendicular to the substrate 10 includes a parallelogram. Figure 2 and Figure 3 In the embodiment, the orthographic projection of the first surface 423 on the substrate 10 is located within the orthographic projection of the second surface 424 on the substrate 10. The isolation structure 40 includes a plurality of isolation openings 401 arranged along the first direction, and the isolation structure between two adjacent isolation openings 401 (for example, Figure 1 The cross-sectional shape of the second portion 420 of the isolation structure 41) in the direction perpendicular to the substrate 10 includes an inverted trapezoid. Figure 2 In the embodiment, the included angle β between the second side surface 422 and the first surface 423 is a right angle, and the isolation structure between two adjacent isolation openings 401 (for example, Figure 1 The cross-sectional shape of the second portion 420 of the isolation structure 41) in the direction perpendicular to the substrate 10 is a right-angled trapezoid. Figure 3 In the embodiment, the included angle β between the second side surface 422 and the first surface 423 is an obtuse angle, and the isolation structure between two adjacent isolation openings 401 (for example, Figure 1 The second portion 420 of the isolation structure 41 in FIG. 1 has a cross-sectional shape perpendicular to the substrate 10 of an isosceles trapezoid. It will be appreciated that a right-angled trapezoid or an isosceles trapezoid are two special cases of a trapezoid. In some embodiments, the trapezoid may also have other shapes, which are not limited in this embodiment of the present application.

[0041] Optionally, the orthographic projection of the surface of the first portion 410 away from the substrate 10 on the substrate 10 is located within the orthographic projection of the surface of the first portion 410 close to the substrate 10 on the substrate 10. Optionally, the isolation structure between two adjacent isolation openings 401 (for example, Figure 1 The cross-sectional shape of the first portion 410 of the isolation structure 41 in the direction perpendicular to the substrate 10 includes a regular trapezoid.

[0042] Continue to refer Figure 1, the display panel further includes a pixel definition layer 20, which encloses a plurality of pixel openings 201. The orthographic projection of the pixel opening 201 on the substrate 10 overlaps with the orthographic projection of the isolation opening 401 on the substrate 10. Optionally, the orthographic projection of the pixel opening 201 on the substrate 10 is located within the orthographic projection of the isolation opening 401 on the substrate 10. In an embodiment of the present application, the pixel definition layer 20 includes an inorganic insulating layer or an organic insulating layer, which is not limited in the embodiment of the present application. Optionally, the pixel definition layer 20 is located between the substrate 10 and the isolation structure 40, as shown in FIG. Figure 1 Alternatively, the pixel definition layer 20 is provided with a clearance opening, and the isolation structure 40 is located in the clearance opening.

[0043] Optionally, the light emitting unit 30 further includes a second electrode 310 and a light emitting functional layer 320 . The second electrode 310 , the light emitting functional layer 320 and the first electrode 330 are stacked in sequence in a direction away from the substrate 10 , and the pixel opening 201 exposes part of the second electrode 310 .

[0044] Optionally, the display panel further includes a first encapsulation layer 510 , which includes a plurality of encapsulation units 511 , each corresponding to the light emitting unit 30 , and an orthographic projection of the encapsulation unit 511 on the substrate 10 overlaps with an orthographic projection of the light emitting unit 30 on the substrate 10 .

[0045] In the above embodiment, the first electrode 330 overlaps the isolation structure 40 (e.g., the first portion 410) on the first side 4011 (i.e., single-sided overlap). This means that only a single deposition of cathode material is required, thus avoiding the issue of visual color deviation caused by a thick cathode film layer. However, in some cases, visual color deviation may not be a high requirement, but impedance must be minimized. In this case, single-sided overlap may not meet the impedance requirement. In this case, double-sided overlap may be an option.

[0046] Figure 4 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application. Figure 4 The display panel shown is Figure 1 The difference between the display panel shown is that the first electrode 330 overlaps the isolation structure 40 (eg, the first portion 410 ) at the second side 4012 . Figure 4In the embodiment, the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the first side 4011 is greater than the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the second side 4012. In this embodiment, two evaporation chambers are used to evaporate the cathode material once, with the evaporation sources in the two evaporation chambers directed toward the first side 4011 and the second side 4012, respectively. Because the angle α between the first side 421 and the first surface 423 is obtuse, and the angle β between the second side 422 and the first surface 423 is acute, the cathode material is more easily evaporated onto the sidewall of the isolation structure 40 on the first side 4011. Therefore, the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the first side 4011 is greater than the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the second side 4012.

[0047] Figure 5 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application. Figure 5 The display panel shown is Figure 3 The difference between the display panel shown is that the first electrode 330 overlaps the isolation structure 40 (eg, the first portion 410 ) at the second side 4012 . Figure 5 In the embodiment, the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the first side 4011 is equal to the overlap area between the first electrode 330 and the isolation structure 40 (e.g., the first portion 410) on the second side 4012. In the embodiment of the present application, two evaporation chambers are used to evaporate the cathode material once, respectively. The evaporation sources in the two evaporation chambers evaporate toward the first side 4011 and the second side 4012, respectively. Since the angle α between the first side surface 421 and the first surface 423 is an obtuse angle, the angle β between the second side surface 422 and the first surface 423 is also an obtuse angle, and the angle α is equal to the angle β, the evaporation area of ​​the cathode material on the first side 4011 and the second side 4012 can be equal, that is, the overlapping area of ​​the first electrode 330 and the isolation structure 40 (for example, the first part 410) on the first side 4011 is equal to the overlapping area of ​​the first electrode 330 and the isolation structure 40 (for example, the first part 410) on the second side 4012 (excluding the influence of process errors).

[0048] Figure 6 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application. Figure 6 The display panel shown is Figure 1The difference between the display panel shown is that the isolation structure 40 further includes a third portion 430, which is located on the side of the first portion 410 closer to the substrate 10. The orthographic projection of the first portion 410 on the substrate 10 is located within the orthographic projection of the third portion 430 on the substrate 10. Optionally, the material of the first portion 410 includes aluminum; and / or the material of the second portion 420 includes titanium; and / or the material of the third portion 430 includes molybdenum. Optionally, the first electrode 330 overlaps the third portion 430 on the first side 4011 or the second side 4012.

[0049] Figure 7 3 is a schematic diagram of the cross-sectional structure of a display panel provided in another embodiment of the present application. Figure 7 The display panel shown is Figure 1 The difference between the display panel shown is that the display panel further includes a second encapsulation layer 520 and a third encapsulation layer 530. The second encapsulation layer 520 and the third encapsulation layer 530 are stacked in sequence in a direction away from the substrate 10, and the second encapsulation layer 520 is located on the side of the first encapsulation layer 510 facing away from the substrate 10. Optionally, the materials of the first encapsulation layer 510 and the third encapsulation layer 530 include inorganic materials, and the material of the second encapsulation layer 520 includes organic materials.

[0050] It should be noted that some or all of the features in the embodiments of the present application can be combined and will not be described in detail here.

[0051] In the embodiment of the present application, the light emitting units 30 of different colors are prepared in steps, for details, see Figure 9 . The isolation openings 401 can be prepared in steps. For example, the corresponding isolation openings 401 can be prepared when the corresponding light-emitting unit 30 is prepared; or, all the isolation openings 401 can be prepared simultaneously. For example, all the isolation openings 401 have been prepared before the light-emitting unit 30 is prepared. In the case where all the isolation openings 401 are prepared simultaneously, since an etching solution is required in the process of preparing the light-emitting unit 30, the first part 410 of the isolation structure 40 is metal aluminum, and the metal aluminum can be etched by the etching solution, resulting in the distance between the side of the first part 410 and the side of the second part 420 becoming larger, that is, the shadow becomes larger, and the cathode material is not easy to evaporate to the side of the isolation structure 40, resulting in the first electrode 330 corresponding to the light-emitting unit 30 evaporated later and the isolation structure 40. The overlapping area becomes smaller or the overlapping is poor. In response to this technical problem, in the embodiment of the present application, the structure of the second part 420 corresponding to different isolation openings 401 is different, specifically as Figure 8 shown.

[0052] Figure 8 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application. Figure 8As shown, the display panel includes a substrate 10, an isolation structure 40 and a plurality of light-emitting units 30. It should be noted that the embodiment of the present application mainly describes the differences from the above embodiment. For the same structures in the embodiment of the present application as in the above embodiment, reference can be made to the description in the above embodiment and no further description is given here.

[0053] In the embodiment of the present application, the isolation structure 40 is located on one side of the substrate 10. The isolation structure 40 encloses a plurality of isolation openings 401. The isolation structure 40 includes a first portion 410 and a second portion 420 stacked in sequence in a direction away from the substrate 10. The orthographic projection of the first portion 410 on the substrate 10 is located within the orthographic projection of the second portion 420 on the substrate 10. The second portion 420 includes a first surface 423 close to the substrate 10 and a second surface 424 away from the substrate 10. Multiple isolation openings 401 include a first isolation opening 402 and a second isolation opening 403, the first isolation opening 402 has a first sub-side 4021 and a second sub-side 4022 arranged opposite to each other, the second isolation opening 403 has a third sub-side 4031 and a fourth sub-side 4032 arranged opposite to each other, the second part 420 also includes a first sub-side surface 4211 located on the first sub-side 4021 and facing the first isolation opening 402, and a third sub-side surface 4213 located on the third sub-side surface 4031 and facing the second isolation opening 403, the angle between the first sub-side surface 4211 and the first surface 423 is a first angle μ1, the angle between the third sub-side surface 4213 and the first surface 423 is a second angle μ2, the first angle μ1 is an obtuse angle, and the first angle μ1 is greater than the second angle μ2. In the embodiment of the present application, the first isolation opening 402 is the isolation opening 401 corresponding to the light-emitting unit 30, which is fabricated later. In this case, the first angle μ1 corresponding to the first isolation opening 402 is set to an obtuse angle. During evaporation, the cathode material is easily evaporated onto the sidewalls of the isolation structure 40, ensuring an effective overlap area and avoiding dark spots in the display caused by poor overlap. Furthermore, the design of the present application ensures that the overlap area between the cathode material and the isolation structure 40 is substantially the same within different isolation openings 401, thereby improving display uniformity.

[0054] Optionally, the second portion 420 further includes a second sub-side surface 4212 located on the second sub-side 4022 and facing the first isolation opening 402. The angle between the second sub-side surface 4212 and the first surface 423 is a third angle μ3, and the third angle μ3 is an obtuse angle. Optionally, the third angle μ3 is equal to the first angle μ1. In the case of double-sided overlap, the overlap area of ​​the first electrode 330 with the isolation structure 40 on both the first sub-side 4021 and the second sub-side 4022 can be the same (excluding process effects).

[0055] Optionally, the second portion 420 further includes a fourth sub-side surface 4214 located on the fourth sub-side 4032 and facing the second isolation opening 403. The angle between the fourth sub-side surface 4214 and the first surface 423 is a third angle μ4, and the fourth angle μ4 is smaller than the first angle μ1. Optionally, the fourth angle μ4 is equal to the second angle μ2. Figure 8 As shown, the second angle μ2 and / or the fourth angle μ4 are right angles. In other embodiments, the second angle μ2 and / or the fourth angle μ4 may also be obtuse angles. In this way, the overlap area between the first electrode 330 and the isolation structure 40 can be further increased to reduce impedance.

[0056] In the embodiment of the present application, the plurality of isolation openings 401 further include a third isolation opening 404, the third isolation opening 404 having a fifth sub-side 4041 and a sixth sub-side 4042 arranged opposite to each other, and the second portion 420 further includes a fifth sub-side surface 4215 located on the fifth sub-side surface 4041 and facing the third isolation opening 404, and a sixth sub-side surface 4216 located on the sixth sub-side surface 4042 and facing the third isolation opening 404. The angle between the fifth sub-side surface 4215 and the first surface 423 is a fifth angle μ5, and the angle between the sixth sub-side surface 4216 and the first surface 423 is a sixth angle μ6, and the fifth angle μ5 is less than the second angle μ2. Optionally, the fifth angle μ5 is equal to the sixth angle μ6. Figure 8 As shown, the fifth angle μ5 and / or the sixth angle μ6 are acute angles. In other embodiments, the fifth angle μ5 and / or the sixth angle μ6 are obtuse angles, which can further increase the overlap area between the first electrode 330 and the isolation structure 40 and reduce impedance.

[0057] Optionally, the first sub-side 4021 and the second sub-side 4022 are arranged along the first direction ( Figure 8 The third sub-side 4031 and the fourth sub-side 4032 are oppositely arranged along the first direction, and the fifth sub-side 4041 and the sixth sub-side 4042 are oppositely arranged along the first direction.

[0058] Optionally, at least a portion of the light-emitting unit 30 is located within the isolation opening 401, and the light-emitting unit 30 includes a first electrode 330, and the first electrode 330 overlaps the isolation structure 40 on the first sub-side 4021, the third sub-side 4031, or the fifth sub-side 4041. Optionally, the first electrode 330 overlaps the first portion 410 on the first sub-side 4021, the third sub-side 4031, or the fifth sub-side 4041. Optionally, the first electrode 330 overlaps the isolation structure 40 on the second sub-side 4022, the fourth sub-side 4032, or the sixth sub-side 4042. Optionally, the first electrode 330 overlaps the first portion 410 on the second sub-side 4022, the fourth sub-side 4032, or the sixth sub-side 4042. Optionally, the isolation structure 40 further includes a third portion (e.g., Figure 6The third portion 430 is located on the side of the first portion 410 close to the substrate, and the orthographic projection of the first portion 410 on the substrate 10 is located within the orthographic projection of the third portion on the substrate. Optionally, the first electrode 330 overlaps the third portion on the first sub-side 4021, the third sub-side 4031, or the fifth sub-side 4041. And / or, the first electrode 330 overlaps the third portion on the second sub-side 4022, the fourth sub-side 4032, or the sixth sub-side 4042. Alternatively, the first electrode 330 overlaps both the first portion 410 and the third portion, which is not limited in this embodiment of the present application.

[0059] Specifically, the light-emitting unit 30 includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. Optionally, the first isolation opening 402 corresponds to the first light-emitting unit, the second isolation opening 403 corresponds to the second light-emitting unit, and the third isolation opening 404 corresponds to the third light-emitting unit. The third light-emitting unit is the first light-emitting unit to be manufactured, the second light-emitting unit is the second light-emitting unit to be manufactured, and the first light-emitting unit is the last light-emitting unit to be manufactured. The embodiments of the present application do not limit the colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit.

[0060] Optionally, the first isolation opening 402 , the second isolation opening 403 and the third isolation opening 404 are repeatedly arranged in sequence along the first direction.

[0061] Alternatively, as Figure 8 As shown, the isolation structure 40 (eg, Figure 8 The second portion 420 of the isolation structure 42 in the cross-sectional shape perpendicular to the substrate 10 includes an inverted trapezoid, and the isolation structure 40 (eg, Figure 8 The cross-sectional shape of the second portion 420 of the isolation structure 43 in the direction perpendicular to the substrate 10 includes a regular trapezoid, and the isolation structure 40 (eg, Figure 8 The cross-sectional shape of the second portion 420 of the isolation structure 44 in the direction perpendicular to the substrate 10 includes a parallelogram. Figure 8 In the example, the inverted trapezoid includes a right-angled trapezoid, and / or the regular trapezoid includes a right-angled trapezoid. Figure 8 Only one specific structure is shown. In other embodiments, it is sufficient to ensure that the first angle μ1 is greater than the second angle μ2, and the second angle μ2 is greater than the fifth angle μ5. For example, in other embodiments, the first angle μ1, the second angle μ2, and the fifth angle μ5 can all be obtuse angles. In this way, the overlap area between the first electrode 330 and the isolation structure 40 can be increased.

[0062] In an embodiment of the present application, the distance h1 between the orthographic projection of the side wall of the first portion 410 located on the first sub-side 4021 and facing the first isolation opening 402 on the substrate 10 and the orthographic projection of the first sub-side 4211 on the substrate 10 is greater than the distance h2 between the orthographic projection of the side wall of the first portion 410 located on the third sub-side 4031 and facing the second isolation opening 403 on the substrate 10 and the orthographic projection of the third sub-side 4213 on the substrate 10; and / or, the distance h2 between the orthographic projection of the side wall of the first portion 410 located on the third sub-side 4031 and facing the second isolation opening 403 on the substrate 10 and the orthographic projection of the third sub-side 4213 on the substrate 10 is greater than the distance h3 between the orthographic projection of the side wall of the first portion 410 located on the fifth sub-side 4041 and facing the third isolation opening 404 on the substrate 10 and the orthographic projection of the fifth sub-side 4215 on the substrate 10. That is, in the present application, since the side wall of the first part 410 corresponding to the first isolation opening 402 is etched twice with the etching liquid, the side etching amount is large, the side wall of the first part 410 corresponding to the second isolation opening 403 is etched once with the etching liquid, the side etching amount is small, and the side wall of the first part 410 corresponding to the third isolation opening 404 is not etched with the etching liquid and has no side etching.

[0063] In the embodiments of the present application, the effects of etching during the fabrication process of the isolation structure 40 are taken into account. Different second portions 420 are configured for the isolation openings 401 of different light-emitting units 30. This ensures sufficient overlap between the first electrode 330 and the isolation structure 40, avoiding dark or gray spots in the display caused by poor overlap. Because the light-emitting units are fabricated in stages, the sidewalls (primarily aluminum sidewalls) of the isolation structure within the isolation openings corresponding to later-fabricated light-emitting units may be over-etched. This makes it difficult to ensure that the cathode material (cathode material) is deposited onto the sidewalls of the isolation structure during evaporation. In this embodiment, the second portions corresponding to different isolation openings have different shapes, and the first angle of the second portions of the isolation openings corresponding to later-fabricated light-emitting units is obtuse. This makes it easier for the cathode material to be deposited onto the sidewalls of the isolation structure during evaporation, increasing the overlap area between the first electrode and the isolation structure, improving cathode continuity, reducing overlap impedance, and improving display quality. Furthermore, this embodiment ensures that the overlap area of ​​different isolation openings is substantially the same, further improving display uniformity.

[0064] Optionally, the display panel further includes a pixel definition layer 20, which encloses a plurality of pixel openings 201. The orthographic projections of the pixel openings 201 on the substrate 10 overlap with the orthographic projections of the isolation openings 401 on the substrate. Optionally, the pixel definition layer 20 is located between the substrate 10 and the isolation structure 40, or the pixel definition layer 20 is provided with a clearance opening, and the isolation structure 40 is located within the clearance opening.

[0065] Optionally, the light emitting unit 30 further includes a second electrode 310 and a light emitting functional layer 320 . The second electrode 310 , the light emitting functional layer 320 and the first electrode 330 are stacked in sequence in a direction away from the substrate 10 , and the pixel opening 201 exposes part of the second electrode 310 .

[0066] Optionally, the display panel further includes a first encapsulation layer (eg, Figure 7 The first encapsulation layer 510 shown in the figure) includes a plurality of encapsulation units, each of which corresponds to the light-emitting unit 30. The orthographic projections of the encapsulation units on the substrate 10 overlap with the orthographic projections of the light-emitting unit 30 on the substrate 10. Optionally, the display panel further includes a second encapsulation layer and a third encapsulation layer (for example, Figure 7 The second encapsulation layer 520 and the third encapsulation layer 530 are shown in FIG. 1 , and the second encapsulation layer is located on the side of the first encapsulation layer facing away from the substrate 10 .

[0067] The embodiment of the present application further provides a display panel, specifically Figure 8 As shown, the display panel includes: a substrate 10 and an isolation structure 40. The isolation structure 40 is located on one side of the substrate 10. The isolation structure 40 encloses a plurality of isolation openings 401. The isolation structure 40 includes a first portion 410 and a second portion 420 stacked in sequence in a direction away from the substrate 10. The plurality of isolation openings 401 include a first isolation opening 402, a second isolation opening 403, and a third isolation opening 404 that are repeatedly arranged in sequence. The isolation structure between the first isolation opening 402 and the second isolation opening 403 (for example, Figure 8 The second portion 420 of the isolation structure 42 in the cross section perpendicular to the substrate 10 includes an inverted trapezoid, and the isolation structure between the second isolation opening 403 and the third isolation opening 404 (eg, Figure 8 The second portion 420 of the isolation structure 43 in the cross section perpendicular to the substrate 10 includes a regular trapezoid, and the isolation structure between the third isolation opening 404 and the first isolation opening 402 (eg, Figure 8 The second portion 420 of the isolation structure 44 in the embodiment of the present application comprises a parallelogram in cross-section perpendicular to the substrate 10. In the embodiment of the present application, different shapes of the second portion 420 are prepared to correspond to the isolation openings 401 of different light-emitting units 30, ensuring sufficient overlap between the first electrode 330 and the isolation structure 40, thereby avoiding dark or gray spots on the display caused by poor overlap.

[0068] Optionally, the inverted trapezoid includes a right-angled trapezoid, and / or the regular trapezoid includes a right-angled trapezoid.

[0069] Optionally, the isolation structure between the first isolation opening 402 and the second isolation opening 403 (eg, Figure 8The first portion 410 of the isolation structure 42 in the first isolation opening 402 is directed toward the orthographic projection of the sidewall of the first isolation opening 402 on the substrate 10 and the isolation structure between the first isolation opening 402 and the second isolation opening 403 (eg, Figure 8 The distance h1 between the orthographic projections of the second portion 420 of the isolation structure 42 in the substrate 10 toward the sidewall of the first isolation opening 402 is greater than the distance h1 between the first isolation opening 402 and the second isolation opening 403 (eg, Figure 8 The first portion 410 of the isolation structure 42 in the second isolation opening 403 faces the orthographic projection of the sidewall of the second isolation opening 403 on the substrate 10 and the isolation structure between the first isolation opening 402 and the second isolation opening 403 (eg, Figure 8 The distance between the orthographic projections of the second portion 420 of the isolation structure 42) toward the sidewalls of the second isolation opening 403 on the substrate 10; and / or, the isolation structure between the second isolation opening 403 and the third isolation opening 404 (eg, Figure 8 The first portion 410 of the isolation structure 43 in the second isolation opening 403 faces the orthographic projection of the sidewall of the second isolation opening 403 on the substrate 10 and the isolation structure between the second isolation opening 403 and the third isolation opening 404 (eg, Figure 8 The distance between the orthographic projections of the second portion 420 of the isolation structure 43 toward the sidewall of the second isolation opening 403 on the substrate 10 is greater than the isolation structure between the second isolation opening 403 and the third isolation opening 404 (eg, Figure 8 The first portion 410 of the isolation structure 43 in the third isolation opening 404 faces the orthographic projection of the sidewall of the third isolation opening 404 on the substrate 10 and the isolation structure between the second isolation opening 403 and the third isolation opening 404 (eg, Figure 8 The distance between the orthographic projections of the second portion 420 of the isolation structure 43 toward the sidewall of the third isolation opening 404 on the substrate 10; and / or the isolation structure between the third isolation opening 404 and the first isolation opening 402 (eg, Figure 8 The first portion 410 of the isolation structure 44 in the third isolation opening 404 faces the orthographic projection of the sidewall of the third isolation opening 404 on the substrate 10 and the isolation structure between the third isolation opening 404 and the first isolation opening 402 (eg, Figure 8 The distance between the orthographic projections of the second portion 420 of the isolation structure 44 in the third isolation opening 404 and the sidewall of the third isolation opening 404 on the substrate 10 is smaller than the isolation structure between the third isolation opening 404 and the first isolation opening 402 (eg, Figure 8 The first portion 410 of the isolation structure 44 in the first isolation opening 402 is directed toward the orthographic projection of the sidewall of the first isolation opening 402 on the substrate 10 and the isolation structure between the third isolation opening 404 and the first isolation opening 402 (eg, Figure 8The distance between the orthographic projections of the sidewalls of the second portion 420 of the isolation structure 44 facing the first isolation opening 402 on the substrate 10 is the distance between the second portion 420 and the sidewalls of the isolation structure 44 facing the first isolation opening 402 on the substrate 10. Optionally, the first isolation opening 402, the second isolation opening 403 and the third isolation opening 404 are repeatedly arranged in sequence along the first direction.

[0070] The embodiments of the present application may be combined with some or all of the features of the above embodiments, which will not be repeated here.

[0071] The present application also provides a method for manufacturing a display panel, comprising: preparing an isolation structure on a substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first portion and a second portion stacked sequentially in a direction away from the substrate, the orthographic projection of the first portion on the substrate being within the orthographic projection of the second portion on the substrate, the second portion comprising a first surface proximal to the substrate and a second surface distal to the substrate, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, the first isolation opening having a first sub-side and a second sub-side oppositely disposed, the second isolation opening having a third sub-side and a fourth sub-side oppositely disposed, the second portion further comprising a first sub-side surface located on the first sub-side and facing the first isolation opening, and a third sub-side surface located on the third sub-side and facing the second isolation opening, the first sub-side surface having a first angle with the first surface, and the third sub-side surface having a second angle with the first surface, the first angle being an obtuse angle and being greater than the second angle. Because the light-emitting units are prepared in steps, the sidewalls (primarily aluminum sidewalls) of the isolation structure within the isolation openings corresponding to the later-prepared light-emitting units are over-etched, making it difficult to ensure that the cathode material is evaporated onto the sidewalls of the isolation structure when evaporating the first electrode material (cathode material). In this solution, the second portions corresponding to different isolation openings have different shapes. The first angle of the second portion of the isolation opening corresponding to the subsequently fabricated light-emitting unit is an obtuse angle. This allows the cathode material to be more easily deposited onto the sidewalls of the isolation structure during evaporation, increasing the overlap area between the first electrode and the isolation structure, enhancing cathode continuity, reducing overlap impedance, and improving display quality. Furthermore, this solution ensures that the overlap area of ​​different isolation openings is substantially the same, further improving display uniformity.

[0072] Figure 9 FIG. 1 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present application. Figure 9 As shown, the method includes the following steps.

[0073] Step S910: preparing an isolation structure on a substrate.

[0074] In the examples of this application, in order to prepare Figures 1 to 8The isolation structure shown in FIG. 1 includes the following steps for preparing the isolation structure. First, a first material layer and a second material layer are sequentially prepared on a substrate; the second material layer is subjected to a first patterning process to obtain a second middle portion. It should be noted that when the second material layer is subjected to the first patterning process, a portion of the first material layer is subjected to the first patterning process. Afterwards, the second middle portion is subjected to a second patterning process to obtain a second portion. Finally, the first material layer is subjected to a third patterning process to obtain a first portion. In an embodiment of the present application, the first patterning process and the second patterning process include dry etching, and the third patterning process includes wet etching. Optionally, the prepared isolation structure may be Figures 1 to 8 The isolation structure in the display panel is shown.

[0075] Optionally, before forming the isolation structure, the method further includes forming a plurality of second electrodes on the substrate; forming an insulating material layer on a side of the second electrodes facing away from the substrate; and after forming the isolation structure, the method further includes patterning the insulating material layer to form a pixel definition layer. The pixel definition layer encloses a plurality of pixel openings, wherein the orthographic projections of the pixel openings on the substrate are located within the orthographic projections of the isolation openings on the substrate, and the pixel openings expose at least a portion of the second electrodes.

[0076] Optionally, in some embodiments, the isolation structure includes a third part, a first part, and a second part stacked in sequence in a direction away from the substrate, and the preparation method includes: preparing a third material layer, a first material layer, and a second material layer in sequence on the substrate; performing a first patterning treatment on the second material layer to obtain a second middle part; performing a second patterning treatment on the second middle part (and a portion of the first material layer) to obtain a second part; performing a third patterning treatment on the first material layer and the third material layer to obtain the first part and the third part.

[0077] It should be noted that for Figure 8The isolation structure shown, after preparing the first material layer and the second material layer, is patterned on the first material layer and the second material layer according to the preparation order of the light-emitting unit, that is, the isolation openings are prepared step by step. Exemplarily, the third light-emitting unit is prepared first. Before preparing the third light-emitting unit, the third isolation opening needs to be prepared first. Since the sidewalls of the isolation structure corresponding to the third isolation opening will not be etched by the etching solution, the second material layer corresponding to the third isolation opening can be patterned only once. Specifically, the first patterning process is performed on the second material layer corresponding to the third isolation opening, and the third patterning process is performed on the second material layer to obtain the third isolation opening. After preparing the third light-emitting unit, before preparing the second light-emitting unit, the second isolation opening needs to be prepared first. Since the sidewalls of the isolation structure corresponding to the second isolation opening will be etched once by the etching solution, the second material layer corresponding to the second isolation opening needs to be patterned twice. Specifically, the first patterning process and the second patterning process are sequentially performed on the second material layer corresponding to the second isolation opening, and the third patterning process is performed on the second material layer to obtain the second isolation opening. After preparing the second light-emitting unit, before preparing the first light-emitting unit, it is necessary to prepare the first isolation opening. Since the sidewalls of the isolation structure corresponding to the first isolation opening will be etched twice by the etching solution, the second material layer corresponding to the first isolation opening needs to be patterned twice. Specifically, the second material layer corresponding to the first isolation opening is subjected to the first patterning process and the second patterning process in sequence, and the second material layer is subjected to the third patterning process to obtain the first isolation opening. In some embodiments, the second material layers corresponding to the first isolation opening, the second isolation opening, and the third isolation opening all need to be patterned twice, the difference being that the etching degree of the second patterning process of the first isolation opening, the second isolation opening, and the third isolation opening is different.

[0078] like Figure 8As shown, the first isolation opening 402 has a first sub-side 4021 and a second sub-side 4022 that are oppositely arranged, the second isolation opening 403 has a third sub-side 4031 and a fourth sub-side 4032 that are oppositely arranged, the third isolation opening 404 has a fifth sub-side 4041 and a sixth sub-side 4042 that are oppositely arranged, and the second portion 420 further includes a first sub-side surface 4211 located on the first sub-side 4021 and facing the first isolation opening 402, a second sub-side surface 4212 located on the second sub-side 4022 and facing the first isolation opening 402, a third sub-side surface 4213 located on the third sub-side 4031 and facing the second isolation opening 403, a fourth sub-side surface 4214 located on the fourth sub-side 4032 and facing the second isolation opening 403, and a The fifth sub-side surface 4215 is located on the fifth sub-side 4041 and faces the third isolation opening 404, and the sixth sub-side surface 4216 is located on the sixth sub-side 4042 and faces the third isolation opening 404. The angle between the first sub-side surface 4211 and the first surface 423 is a first angle μ1, the angle between the third sub-side surface 4213 and the first surface 423 is a second angle μ2, the angle between the second sub-side surface 4212 and the first surface 423 is a third angle μ3, the angle between the fourth sub-side surface 4214 and the first surface 423 is a fourth angle μ4, the angle between the fifth sub-side surface 4215 and the first surface 423 is a fifth angle μ5, and the angle between the sixth sub-side surface 4216 and the first surface 423 is a sixth angle μ6. The first angle μ1 and / or the third angle μ3 are obtuse angles, the second angle μ2 and / or the fourth angle μ4 are right angles, and the fifth angle μ5 and / or the sixth angle μ6 are acute angles.

[0079] Step S920 , preparing a first electrode in the isolation opening.

[0080] Optionally, when preparing the first electrode, Figures 1 to 3 The single-sided overlapped display panel in the embodiment uses a single evaporation source, which is tilted toward the first side 4011, so that the first electrode 330 overlaps the isolation structure 40 on the first side 4011. During evaporation, the angle between the evaporation direction of the evaporation source and the direction perpendicular to the substrate 10 is smaller than the angle between the first side 421 and the direction perpendicular to the substrate 10. In this case, the first side 421 will not block the cathode material, and the cathode material can overlap to a higher position of the first portion 410 of the isolation structure 40, that is, the overlap area is increased. Figure 4 or Figure 5 In the double-sided overlapped display panel, two evaporation sources are used for evaporation respectively, and the two evaporation sources are tilted toward the first side 4011 and the second side 4012 respectively, so that the first electrode 330 overlaps the isolation structure 40 on the first side 4011 and the second side 4012.

[0081] for Figure 8The manufacturing method of the display panel shown includes: forming the first electrode 330 in the first isolation opening 402, and / or forming the first electrode 330 in the second isolation opening 403, and / or forming the first electrode 330 in the third isolation opening 404. It should be noted that in the actual manufacturing process, the first electrode 330 is first formed in the third isolation opening 404, then the first electrode 330 is formed in the second isolation opening 403, and finally the first electrode 330 is formed in the first isolation opening 402.

[0082] Optionally, the fifth angle μ5 is an acute angle. When preparing the first electrode 330 in the third isolation opening 404, the fifth sub-side surface will block the evaporated cathode material. Since the side walls of the isolation structure 40 in the third isolation opening 404 are not side-engraved, the cathode material can be overlapped with the isolation structure 40, and a sufficient overlap area can be guaranteed.

[0083] Optionally, the second angle μ2 is a right angle. When preparing the first electrode 330 in the second isolation opening 403, the third sub-side surface will partially block the evaporated cathode material, and the degree of blocking is less than the degree of blocking of the cathode material by the fifth sub-side surface. Since the side wall of the isolation structure 40 in the second isolation opening 403 is engraved once, it can be ensured that the overlapping area in the second isolation opening 403 is basically the same as the overlapping area in the third isolation opening 404.

[0084] Optionally, because the first angle μ1 is an obtuse angle, when preparing the first electrode 330 within the first isolation opening 402, the angle between the evaporation direction of the evaporation source and the direction perpendicular to the substrate is smaller than the angle between the first sub-side surface and the direction perpendicular to the substrate. In this way, the first sub-side surface will not block the evaporated cathode material, increasing the height of the evaporation and improving the overlap area. Because the sidewalls of the isolation structure 40 within the first isolation opening 402 are engraved twice, the first portion 410 is significantly recessed. Therefore, in order to ensure an effective overlap area, the first angle μ1 is set to an obtuse angle to ensure sufficient overlap area.

[0085] Optionally, before forming the first electrode within the isolation opening, the method further includes forming a light-emitting functional layer within the isolation opening. The second electrode, the light-emitting functional layer, and the first electrode constitute a light-emitting unit. After forming the first electrode within the isolation opening, the method further includes forming a first encapsulation layer on a side of the first electrode facing away from the substrate. The first encapsulation layer includes a plurality of encapsulation units, the orthographic projections of the encapsulation units on the substrate overlapping with the orthographic projections of the light-emitting units on the substrate.

[0086] It should be noted that, in the embodiment of the present application, light-emitting units of different colors are prepared in steps. Optionally, a third preparation material layer corresponding to the third light-emitting unit is prepared, the third preparation material layer corresponding to the second isolation opening and the first isolation opening is etched, the third preparation material layer corresponding to the third isolation opening is retained, and the light-emitting functional layer, the first electrode, and the packaging unit corresponding to the third light-emitting unit are formed; then, a second preparation material layer corresponding to the second light-emitting unit is prepared, the second preparation material layer corresponding to the first isolation opening and the third isolation opening is etched, the second preparation material layer corresponding to the second isolation opening is retained, and the light-emitting functional layer, the first electrode, and the packaging unit corresponding to the second light-emitting unit are formed; finally, a first preparation material layer corresponding to the first light-emitting unit is prepared, the first preparation material layer corresponding to the second isolation opening and the third isolation opening is etched, the first preparation material layer corresponding to the first isolation opening is retained, and the light-emitting functional layer, the first electrode, and the packaging unit corresponding to the first light-emitting unit are formed.

[0087] Optionally, after preparing the first encapsulation layer, the preparation method further comprises: sequentially preparing a second encapsulation layer and a third encapsulation layer on a side of the first encapsulation layer facing away from the substrate.

[0088] In a third aspect, an embodiment of the present application provides a display device, which includes the display panel described in the above embodiment.

[0089] Figure 10 Schematic diagram of the structure of a display device provided by an embodiment of the present application. Figure 10 As shown, the display device 1000 is a product with an image display function. For example, the display device 1000 can be used to display static images, such as pictures or photos. The display device 1000 can also be used to display dynamic images, such as videos.

[0090] The display device 1000 may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0091] The display device 1000 includes a display panel provided by any of the above embodiments, which may be an organic light emitting diode display panel or a quantum dot electroluminescent display panel.

[0092] In addition, the display device 1000 may also have functions such as taking photos, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 1000 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0093] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0094] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0095] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0096] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0097] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0098] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; An 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 stacked in sequence in a direction away from the substrate, the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate, the second portion includes a first surface close to the substrate and a second surface away from the substrate, the plurality of isolation openings include a first isolation opening and a second isolation opening, the first isolation opening has a first sub-side and a second sub-side arranged oppositely, the second isolation opening has a third sub-side and a fourth sub-side arranged oppositely, the second portion also includes a first sub-side located on the first sub-side and facing the first isolation opening, and a first sub-side located on the third sub-side and facing the second isolation opening. a third sub-side surface of the opening, an included angle between the first sub-side surface and the first surface is a first included angle, an included angle between the third sub-side surface and the first surface is a second included angle, the first included angle is an obtuse angle, and the first included angle is greater than the second included angle; the multiple isolation openings further include a third isolation opening, the third isolation opening having a fifth sub-side and a sixth sub-side surface that are oppositely arranged, the second portion further includes a fifth sub-side surface located on the fifth sub-side surface and facing the third isolation opening, and a sixth sub-side surface located on the sixth sub-side surface and facing the third isolation opening, the included angle between the fifth sub-side surface and the first surface is a fifth included angle, the included angle between the sixth sub-side surface and the first surface is a sixth included angle, and the fifth included angle is less than the second included angle; The second portion of the isolation structure located between the first isolation opening and the second isolation opening has a cross-sectional shape perpendicular to the substrate including an inverted trapezoid, the second portion of the isolation structure located between the second isolation opening and the third isolation opening has a cross-sectional shape perpendicular to the substrate including a regular trapezoid, and the second portion of the isolation structure located between the third isolation opening and the first isolation opening has a cross-sectional shape perpendicular to the substrate including a parallelogram; A plurality of light-emitting units, at least part of each of which is located within the isolation opening, the light-emitting units including a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, the first isolation opening corresponding to the first light-emitting unit, the second isolation opening corresponding to the second light-emitting unit, the third isolation opening corresponding to the third light-emitting unit, the third light-emitting unit being the first light-emitting unit prepared, the second light-emitting unit being the second light-emitting unit prepared, and the first light-emitting unit being the last light-emitting unit prepared.

2. The display panel according to claim 1, wherein: The second portion also includes a second sub-side surface located on the second sub-side and facing the first isolation opening, the angle between the second sub-side surface and the first surface is a third angle, and the third angle is an obtuse angle; and / or, the second portion also includes a fourth sub-side surface located on the fourth sub-side and facing the second isolation opening, the angle between the fourth sub-side surface and the first surface is a fourth angle, and the fourth angle is smaller than the first angle.

3. The display panel according to claim 2, wherein: The third angle is equal to the first angle; and / or the fourth angle is equal to the second angle.

4. The display panel according to claim 1, wherein: The inverted trapezoid includes a right-angled trapezoid; and / or, the regular trapezoid includes a right-angled trapezoid.

5. The display panel according to claim 1, wherein: The distance between the orthographic projection of the side wall of the first portion located on the first sub-side and facing the first isolation opening on the substrate and the orthographic projection of the first sub-side surface on the substrate is greater than the distance between the orthographic projection of the side wall of the first portion located on the third sub-side and facing the second isolation opening on the substrate and the orthographic projection of the third sub-side surface on the substrate; the distance between the orthographic projection of the side wall of the first portion located on the third sub-side and facing the second isolation opening on the substrate and the orthographic projection of the third sub-side surface on the substrate is greater than the distance between the orthographic projection of the side wall of the first portion located on the fifth sub-side and facing the third isolation opening on the substrate and the orthographic projection of the fifth sub-side surface on the substrate.

6. The display panel according to claim 1, wherein: The light-emitting unit includes a first electrode, which overlaps the isolation structure at the first sub-side, the third sub-side or the fifth sub-side; and / or, the first electrode overlaps the isolation structure at the second sub-side, the fourth sub-side or the sixth sub-side.

7. The display panel according to claim 6, wherein: The first electrode overlaps the first portion at the first sub-side, the third sub-side, or the fifth sub-side; and / or the first electrode overlaps the isolation structure at the second sub-side, the fourth sub-side, or the sixth sub-side.

8. The display panel according to claim 6, wherein: The isolation structure also includes a third part, which is located on the side of the first part close to the substrate, and the orthographic projection of the first part on the substrate is located within the orthographic projection of the third part on the substrate; the first electrode overlaps the third part on the first sub-side, the third sub-side or the fifth sub-side; and / or the first electrode overlaps the third part on the second sub-side, the fourth sub-side or the sixth sub-side.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel further includes a pixel definition layer, wherein the pixel definition layer encloses a plurality of pixel openings, and the orthographic projections of the pixel openings on the substrate overlap with the orthographic projections of the isolation openings on the substrate; and / or, The light-emitting unit includes a second electrode, a light-emitting functional layer, and a first electrode, wherein the second electrode, the light-emitting functional layer, and the first electrode are sequentially stacked in a direction away from the substrate, and the pixel opening exposes a portion of the second electrode; and / or, The display panel further includes a first encapsulation layer, the first encapsulation layer includes a plurality of encapsulation units, the encapsulation units correspond to the light-emitting units, and the orthographic projections of the encapsulation units on the substrate overlap with the orthographic projections of the light-emitting units on the substrate; and / or, The display panel further includes a second encapsulation layer and a third encapsulation layer stacked in sequence in a direction away from the substrate, wherein the second encapsulation layer is located on a side of the first encapsulation layer away from the substrate.

10. A display panel, characterized in that: include: substrate; An isolation structure is located on one side of the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure includes a first portion and a second portion sequentially stacked in a direction away from the substrate, the plurality of isolation openings include a first isolation opening, a second isolation opening, and a third isolation opening that are sequentially repeated, the second portion of the isolation structure between the first isolation opening and the second isolation opening includes an inverted trapezoidal cross-sectional shape perpendicular to the substrate direction, the second portion of the isolation structure between the second isolation opening and the third isolation opening includes a regular trapezoidal cross-sectional shape perpendicular to the substrate direction, the third isolation opening and the first isolation opening are connected to each other. The cross-sectional shape of the second portion of the isolation structure between the exits in a direction perpendicular to the substrate includes a parallelogram, the angle between the side of the inverted trapezoid facing the first isolation opening and the bottom of the inverted trapezoid facing the substrate is a third angle, the angle between the side of the right trapezoid facing the second isolation opening and the bottom of the right trapezoid facing the substrate is a fourth angle, and the angle between the side of the parallelogram facing the third isolation opening and the bottom of the parallelogram facing the substrate is a sixth angle, wherein the third angle is an obtuse angle, the third angle is greater than the fourth angle, and the fourth angle is greater than the sixth angle; A plurality of light-emitting units, at least part of each of which is located within the isolation opening, the light-emitting units including a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, the first isolation opening corresponding to the first light-emitting unit, the second isolation opening corresponding to the second light-emitting unit, the third isolation opening corresponding to the third light-emitting unit, the third light-emitting unit being the first light-emitting unit prepared, the second light-emitting unit being the second light-emitting unit prepared, and the first light-emitting unit being the last light-emitting unit prepared.

11. The display panel according to claim 10, wherein: The inverted trapezoid includes a right-angled trapezoid, and / or the regular trapezoid includes a right-angled trapezoid.

12. The display panel according to claim 10, wherein: a distance between an orthographic projection of the first portion of the isolation structure between the first isolation opening and the second isolation opening toward the side wall of the first isolation opening and an orthographic projection of the second portion of the isolation structure between the first isolation opening and the second isolation opening toward the side wall of the first isolation opening on the substrate being greater than a distance between an orthographic projection of the first portion of the isolation structure between the first isolation opening and the second isolation opening toward the side wall of the second isolation opening on the substrate and an orthographic projection of the second portion of the isolation structure between the first isolation opening and the second isolation opening toward the side wall of the second isolation opening on the substrate; and / or, a distance between an orthographic projection of the first portion of the isolation structure between the second isolation opening and the third isolation opening toward the side wall of the second isolation opening and an orthographic projection of the second portion of the isolation structure between the second isolation opening and the third isolation opening toward the side wall of the second isolation opening on the substrate being greater than a distance between an orthographic projection of the first portion of the isolation structure between the second isolation opening and the third isolation opening toward the side wall of the third isolation opening and an orthographic projection of the second portion of the isolation structure between the second isolation opening and the third isolation opening toward the side wall of the third isolation opening on the substrate; and / or, The distance between the orthographic projection of the first portion of the isolation structure between the third isolation opening and the first isolation opening toward the side wall of the third isolation opening on the substrate and the orthographic projection of the second portion of the isolation structure between the third isolation opening and the first isolation opening toward the side wall of the third isolation opening on the substrate is smaller than the distance between the orthographic projection of the first portion of the isolation structure between the third isolation opening and the first isolation opening toward the side wall of the first isolation opening on the substrate and the orthographic projection of the second portion of the isolation structure between the third isolation opening and the first isolation opening toward the side wall of the first isolation opening on the substrate.

13. The display panel according to claim 10, wherein: The first isolation opening, the second isolation opening and the third isolation opening are repeatedly arranged in sequence along the first direction; the first isolation opening includes a first sub-side and a second sub-side arranged opposite to each other along the first direction, the second isolation opening includes a third sub-side and a fourth sub-side arranged opposite to each other along the first direction, and the third isolation opening includes a fifth sub-side and a sixth sub-side arranged opposite to each other along the first direction; the second part includes a first surface close to the substrate and a second surface away from the substrate, the second part also includes a first sub-side surface located on the first sub-side and facing the first isolation opening, a third sub-side surface located on the third sub-side and facing the second isolation opening, and a fifth sub-side surface located on the fifth sub-side and facing the third isolation opening, the angle between the first sub-side surface and the first surface is a first angle, the angle between the third sub-side surface and the first surface is a second angle, the angle between the fifth sub-side surface and the first surface is a fifth angle, the first angle is greater than the second angle, and the second angle is greater than the fifth angle.

14. The display panel according to claim 13, wherein: The first angle is an obtuse angle, and / or the second angle is a right angle, and / or the fifth angle is an acute angle.

15. The display panel according to claim 13, wherein: The third angle is equal to the first angle; and / or, the fourth angle is equal to the second angle; and / or, the sixth angle is equal to the fifth angle.

16. A method for preparing a display panel, characterized in that: include: An isolation structure is prepared on a substrate, wherein the isolation structure encloses a plurality of isolation openings, the isolation structure comprising a first portion and a second portion sequentially stacked in a direction away from the substrate, the orthographic projection of the first portion on the substrate being located within the orthographic projection of the second portion on the substrate, the second portion comprising a first surface close to the substrate and a second surface away from the substrate, the plurality of isolation openings comprising a first isolation opening and a second isolation opening, the first isolation opening having a first sub-side and a second sub-side arranged oppositely, the second isolation opening having a third sub-side and a fourth sub-side arranged oppositely, the second portion further comprising a first sub-side surface located on the first sub-side and facing the first isolation opening, and a first sub-side surface located on the third sub-side and facing the second isolation opening. a third sub-side surface, an included angle between the first sub-side surface and the first surface is a first included angle, an included angle between the third sub-side surface and the first surface is a second included angle, the first included angle is an obtuse angle, and the first included angle is greater than the second included angle; the multiple isolation openings further include a third isolation opening, the third isolation opening having a fifth sub-side and a sixth sub-side surface that are oppositely arranged, the second portion further includes a fifth sub-side surface located on the fifth sub-side surface and facing the third isolation opening, and a sixth sub-side surface located on the sixth sub-side surface and facing the third isolation opening, the included angle between the fifth sub-side surface and the first surface is a fifth included angle, the included angle between the sixth sub-side surface and the first surface is a sixth included angle, and the fifth included angle is less than the second included angle; The second portion of the isolation structure located between the first isolation opening and the second isolation opening has a cross-sectional shape perpendicular to the substrate including an inverted trapezoid, the second portion of the isolation structure located between the second isolation opening and the third isolation opening has a cross-sectional shape perpendicular to the substrate including a regular trapezoid, and the second portion of the isolation structure located between the third isolation opening and the first isolation opening has a cross-sectional shape perpendicular to the substrate including a parallelogram; preparing a first electrode in the third isolation opening; preparing a first electrode in the second isolation opening; A first electrode is prepared in the first isolation opening; wherein, when preparing the first electrode in the first isolation opening, an angle between an evaporation direction of an evaporation source and a direction perpendicular to the substrate is smaller than an angle between the first sub-side surface and a direction perpendicular to the substrate.

17. The method for manufacturing a display panel according to claim 16, wherein: The step of preparing an isolation structure on a substrate includes: sequentially preparing a first material layer and a second material layer on the substrate; performing a first patterning process on the second material layer to obtain a second middle portion; performing a second patterning process on the second middle portion to obtain the second portion; Performing a third patterning process on the first material layer to obtain the first portion.

18. A display device, characterized in that: A display panel comprising any one of claims 1 to 15, or a display panel prepared by the method according to claim 16 or 17.

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