Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the isolation structure is located on one side of the substrate, a plurality of isolation openings are defined by the isolation structure, the isolation structure comprises a first part and a second part, the second part comprises a first surface and a second surface, the plurality of isolation openings comprise a first isolation opening and a second isolation opening, the first isolation opening is provided with a first sub-side and a second sub-side, and the second sub-side is provided with a second sub-side. The second isolation opening is provided with a third sub-side and a fourth sub-side, the second part further comprises a first sub-side face which is located on the first sub-side and faces the first isolation opening and a third sub-side face which is located on the third sub-side and faces the second isolation opening, and the included angle between the first sub-side face and the first surface is a first included angle; the included angle between the third sub-side face and the first surface is a second included angle, and the first included angle is an obtuse angle and is larger than the second included angle. According to the technical scheme, the lap joint area can be increased, lap joint impedance can be reduced, and the display effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel, a preparation method thereof, and a display device. Background Art

[0002] With the development of display technologies, organic light-emitting diodes (OLEDs) are one of the commonly used display screens in electronic devices such as mobile phones, tablet computers, smart TVs, and smart wearable devices due to their advantages of low power consumption, high brightness, wide viewing angle, and high contrast. In the preparation process of traditional display panels, light-emitting pixel patterning is usually achieved through a fine metal mask (FMM). The FMM technology is mature and has rich mass production experience. However, the FMM technology also has problems such as limited precision, high development cost, and long development cycle. The fine metal maskless technology eliminates the limitations of traditional OLED processes on display screen size, resolution, and other screen body performances, and has the advantages of high performance, full-domain size, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A record the relevant content of the fine metal maskless technology for reference.

[0003] However, there are still some problems in the current display panel during display. Summary of the Invention

[0004] To solve the above problems, embodiments of the present application provide a display panel, a preparation method thereof, and a display device.

[0005] In a first aspect, an embodiment of the present application provides a display panel, including: a substrate; an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure including a first part and a second part stacked in sequence along a direction away from the substrate, a positive projection of the first part on the substrate is located within a positive projection of the second part on the substrate, the second part 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 part further includes 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 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.

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

[0007] In combination with the first aspect, the plurality of isolation openings further includes a third isolation opening. The third isolation opening has a fifth sub-side and a sixth sub-side that are oppositely arranged. The second part further 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 included angle between the fifth sub-side surface and the first surface is a fifth included angle, and the included angle between the sixth sub-side surface and the first surface is a sixth included angle. The fifth included angle is less than the second included angle; preferably, the fifth included angle is equal to the sixth included angle; preferably, the fifth included angle and / or the sixth included angle is an acute angle or an obtuse angle; preferably, the fifth sub-side and the sixth sub-side are oppositely arranged along the first direction; preferably, the first isolation opening, the second isolation opening, and the third isolation opening are sequentially and repeatedly arranged along the first direction.

[0008] In combination with the first aspect, the cross-sectional shape of the second part 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 part 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. The cross-sectional shape of the second part 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 part 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 part 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 part 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 part 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 further includes a plurality of light-emitting units, at least a part of the light-emitting units is located within the isolation opening, the light-emitting unit includes a first electrode, and the first electrode overlaps with the isolation structure on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps with the first part on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps with the isolation structure on the second sub-side, the fourth sub-side or the sixth sub-side; preferably, the first electrode overlaps with 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 further includes a third part, the third part is located on the side of the first part close to the substrate, and the orthographic projection of the first part on the substrate is located within the orthographic projection of the third part on the substrate; preferably, the first electrode overlaps with the third part on the first sub-side, the third sub-side or the fifth sub-side; preferably, the first electrode overlaps with 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, the pixel definition layer encloses a plurality of pixel openings, and the orthographic projection of the pixel openings on the substrate overlaps with the orthographic projection of the isolation openings 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 relief opening, and the isolation structure is located within the relief opening; preferably, the light-emitting unit further includes a second electrode and a light-emitting functional layer, the second electrode, the light-emitting functional layer and the first electrode are sequentially stacked in a direction away from the substrate, and a part of the second electrode is exposed through the pixel opening; preferably, 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 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 sequentially stacked in a direction away from the substrate, and the second encapsulation layer is located on the side of the first encapsulation layer away from the substrate.

[0013] In a second aspect, an embodiment of the present application further provides a display panel, including: a substrate; an isolation structure located on one side of the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure includes a first part and a second part 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 cross-sectional shape of the second part of the isolation structure between the first isolation opening and the second isolation opening in a direction perpendicular to the substrate includes an inverted trapezoid, the cross-sectional shape of the second part of the isolation structure between the second isolation opening and the third isolation opening in a direction perpendicular to the substrate includes a regular trapezoid, and the cross-sectional shape of the second part of the isolation structure between the third isolation opening and the first isolation opening in a direction perpendicular to the substrate includes a parallelogram.

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

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

[0016] In combination with the second aspect, the first isolation opening, the second isolation opening, and the third isolation opening are sequentially and repeatedly arranged along the first direction; preferably, the first isolation opening includes a first sub-side and a second sub-side that are oppositely arranged along the first direction, the second isolation opening includes a third sub-side and a fourth sub-side that are oppositely arranged along the first direction, and the third isolation opening includes a fifth sub-side and a sixth sub-side that are oppositely arranged along the first direction; the second part includes a first surface close to the substrate and a second surface far from the substrate, and the second part further 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, and 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; 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 further 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 equal to the first angle; preferably, the second part further 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, the fourth angle is less than the first angle, and the fourth angle is equal to the second angle; preferably, the second part further includes a sixth sub-side surface located on the sixth sub-side and facing the third isolation opening, the angle between the sixth sub-side surface and the first surface is a sixth angle, and the sixth angle is equal to the fifth angle.

[0017] In a third aspect, an embodiment of the present application further provides a method for manufacturing a display panel, including: preparing an isolation structure on a substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure including a first part and a second part that are sequentially stacked along a direction away from the substrate, the orthographic projection of the first part on the substrate is located within the orthographic projection of the second part on the substrate, the second part includes a first surface close to the substrate and a second surface far 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 that are oppositely arranged, the second isolation opening has a third sub-side and a fourth sub-side that are oppositely arranged, the second part further includes 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 is a first angle, the angle between the third sub-side surface and the first surface is a second angle, the first angle is an obtuse angle, and the first angle is greater than the second angle.

[0018] Combined 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 process on the second material layer to obtain a second intermediate part; performing a second patterning process on the second intermediate part to obtain a second part; performing a third patterning process on the first material layer to obtain a first part; 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 evaporation direction of the evaporation source forms an angle with the direction perpendicular to the substrate that 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, including the above-mentioned display panel, or including a display panel prepared according to the above-mentioned method.

[0020] Through the above technical solution, since the light-emitting units are prepared step by step, over-etching exists on the sidewalls of the isolation structure (mainly the aluminum sidewalls) in the isolation openings corresponding to the later-prepared light-emitting units, resulting in difficulty in ensuring 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 shapes of the second parts corresponding to different isolation openings are different, and the first angle of the second part of the isolation opening corresponding to the later-prepared light-emitting unit is an obtuse angle. Thus, during evaporation, the cathode material is more likely to be evaporated onto the sidewalls of the isolation structure, increasing the overlapping area between the first electrode and the isolation structure, enhancing the continuity of the cathode, reducing the overlapping impedance, and improving the display effect. Moreover, in this solution, it can be ensured that the overlapping areas of different isolation openings are basically the same, further improving the display uniformity. Description of the Drawings

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

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

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

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

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

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

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

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

[0029] Figure 9 It is a schematic flowchart of a method for manufacturing a display panel provided by an embodiment of the present application.

[0030] Figure 10 It is a schematic structural diagram of a display device provided by an embodiment of the present application. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] When manufacturing a display panel, the functional film layers in the light-emitting units need to be formed by evaporation. When evaporating the functional film layers using a fine metal mask (FMM), multiple alignments are required. To solve the position offset caused by alignment errors, sufficient space needs to be reserved between different light-emitting units, which results in a low aperture ratio of the light-emitting units and makes it difficult to increase the pixel density of the display panel.

[0033] In the present application, there is no need to use a mask, and a full-surface evaporation process is adopted to separately evaporate and encapsulate light-emitting units of different colors (also referred to as different sub-pixels). There is no need to consider the alignment accuracy problem during evaporation. Therefore, the gap between the light-emitting units can be designed to be smaller, thereby increasing the pixel density. In this method, an isolation structure is provided between adjacent light-emitting units. The isolation structure can isolate adjacent light-emitting units, and when the cathode is connected to the isolation structure, full-surface conduction can be achieved, thereby reducing the voltage drop (IR Drop). However, through research in the present application, it is found that the cathode connection area is small and the connection impedance is large, which is likely to cause display abnormalities.

[0034] In view of the above technical problems, an embodiment of the present application provides a display panel, which includes a substrate, an isolation structure, and a plurality of light-emitting units. Among them, the isolation structure is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings, and the isolation openings have a first side and a second side that are oppositely arranged; the isolation structure includes a first part and a second part that are sequentially stacked along a direction away from the substrate, and the orthographic projection of the first part on the substrate is located within the orthographic projection of the second part on the substrate. The second part includes a first surface close to the substrate, a second surface away from 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. The included angle between the first side surface and the first surface is an obtuse angle; at least a part of the light-emitting unit is located within the isolation opening, and the light-emitting unit includes a first electrode, and the first electrode is overlapped with the isolation structure on the first side. Optionally, the first electrode is overlapped with the first part of the isolation structure. Among them, overlapping means that the first electrode is electrically connected to the isolation structure. In the embodiment of the present application, by setting the included angle between the first side surface and the first surface as an obtuse angle, when evaporating the cathode material, the cathode material is more likely to be evaporated onto the side wall of the isolation structure, increasing the overlapping area between the first electrode and the isolation structure, increasing the cathode continuity, reducing the overlapping impedance, and improving the display effect.

[0035] Figure 1 It is a schematic cross-sectional structure diagram of the display panel provided by an embodiment of the present application. As Figure 1 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, etc. The substrate may be a rigid substrate, such as a glass substrate; it may also be a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc. The circuit layer may include multiple wiring layers and a dielectric layer for isolating the wiring layers, etc., and a pixel circuit, etc. may be formed in the circuit layer.

[0037] The isolation structure 40 is located on one side of the substrate 10, and the isolation structure 40 encloses a plurality of isolation openings 401, and the isolation openings 401 have a first side 4011 and a second side 4012 that are oppositely arranged. Among them, the first side 4011 and the second side 4012 are along the first direction ( Figure 1in the x - direction). Optionally, the first direction corresponds to the scanning direction during evaporation coating. The isolation structure 40 includes a first part 410 and a second part 420 that are stacked in sequence along the direction away from the substrate 10. The orthographic projection of the first part 410 on the substrate 10 is located within the orthographic projection of the second part 420 on the substrate 10. The material of the first part 410 includes aluminum, and the material of the second part 420 includes titanium. The second part 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 the embodiment of the present application, the included angle α between the first side surface 421 and the first surface 423 is an obtuse angle. In this way, compared with the conventional isolation structure 40 (in the conventional isolation structure, the cross - sectional shape of the second part is a regular trapezoid), when evaporating the cathode material, the cathode material is more likely to be evaporated onto the side wall of the isolation structure 40 (specifically, the side wall of the first part 410), increasing the overlapping area between the first electrode 330 and the isolation structure 40, increasing the cathode continuity, reducing the overlapping impedance, and improving the display effect. The isolation structure 40 in the embodiment of the present application can increase the overlapping area between the first electrode 330 and the isolation structure 40, reduce the overlapping impedance, and improve the dark spots or gray spots caused by overlapping.

[0038] At least a part of the light - emitting unit 30 is located within the isolation opening 401. Optionally, the light - emitting unit 30 includes a first electrode 330, and the first electrode 330 overlaps with the isolation structure 40 (for example, the first part 410) on the first side 4011. The first electrode 330 does not overlap with the isolation structure 40 (for example, the first part 410) on the second side 4012. That is, for the case of single - side overlapping, as long as the included angle α between the first side surface 421 and the first surface 423 is an obtuse angle, and the first electrode 330 overlaps with the isolation structure 40 (for example, the first part 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 inclined towards the first side 4011 direction, so that the evaporated first electrode 330 overlaps with the isolation structure 40 (for example, the first part 410) on the first side 4011.

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

[0040] For example, in Figure 1Among them, the included 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 and the orthographic projection of the second surface 424 on the substrate 10 partially overlap. Wherein, the first side surface 421 and the second side surface 422 may be parallel or non-parallel, and the embodiments of the present application do not limit this. When the first side surface 421 and the second side surface 422 are parallel, the sum of the included angle α and the included angle β is 180°. Optionally, the isolation structure 40 includes a plurality of isolation openings 401 arranged along the first direction, and the second part 420 of the isolation structure (for example, Figure 1 the isolation structure 41 in) has a parallelogram shape in a cross-section perpendicular to the substrate 10 direction. For another example, in Figure 2 and Figure 3 Among them, 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 second part 420 of the isolation structure (for example, Figure 1 the isolation structure 41 in) has an inverted trapezoid shape in a cross-section perpendicular to the substrate 10 direction. Among them, in Figure 2 Among them, the included angle β between the second side surface 422 and the first surface 423 is a right angle, and the second part 420 of the isolation structure (for example, Figure 1 the isolation structure 41 in) has a right trapezoid shape in a cross-section perpendicular to the substrate 10 direction. In Figure 3 Among them, the included angle β between the second side surface 422 and the first surface 423 is an obtuse angle, and the second part 420 of the isolation structure (for example, Figure 1 the isolation structure 41 in) has an isosceles trapezoid shape in a cross-section perpendicular to the substrate 10 direction. It can be understood that the right trapezoid or the isosceles trapezoid are two special cases of the trapezoid. In some embodiments, it may also be a trapezoid of other shapes, and the embodiments of the present application do not limit this.

[0041] Optionally, the orthographic projection of the surface of the first part 410 away from the substrate 10 on the substrate 10 is located within the orthographic projection of the surface of the first part 410 close to the substrate 10 on the substrate 10. Optionally, the first part 410 of the isolation structure (for example, Figure 1 the isolation structure 41 in) has a regular trapezoid shape in a cross-section perpendicular to the substrate 10 direction.

[0042] Continue to refer to Figure 1, the display panel further includes a pixel definition layer 20, and the pixel definition layer 20 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 the embodiment of the present application, the pixel definition layer 20 includes an inorganic insulating layer or an organic insulating layer, and the embodiment of the present application does not limit this. Optionally, the pixel definition layer 20 is located between the substrate 10 and the isolation structure 40, as Figure 1 shown. Alternatively, the pixel definition layer 20 is provided with a relief opening, and the isolation structure 40 is located within the relief 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 sequentially stacked along the direction away from the substrate 10, and the pixel opening 201 exposes a part of the second electrode 310.

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

[0045] In the above embodiment, the first electrode 330 is lapped with the isolation structure 40 (for example, the first part 410) on the first side 4011 (i.e., single-sided lapping), that is, only one evaporation of the cathode material is required, which can avoid the problem of viewing angle deviation caused by a relatively thick cathode film layer. However, in some cases, the requirement for viewing angle deviation may not be high, but the requirement for impedance is as small as possible. At this time, single-sided lapping may not meet the impedance requirement. At this time, double-sided lapping can be selected.

[0046] Figure 4 is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. Figure 4 The shown display panel and Figure 1 The difference between the shown display panel is that the first electrode 330 is lapped with the isolation structure 40 (for example, the first part 410) on the second side 4012. In Figure 4In it, the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 410) on the first side 4011 is larger than the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 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, and the evaporation sources in the two evaporation chambers are respectively oriented towards the first side 4011 and the second side 4012 for evaporation. Since the angle α between the first side surface 421 and the first surface 423 is an obtuse angle, and the angle β between the second side surface 422 and the first surface 423 is an acute angle, therefore, the cathode material is more likely to be evaporated onto the side wall of the isolation structure 40 on the first side 4011. Therefore, the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 410) on the first side 4011 is larger than the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 410) on the second side 4012.

[0047] Figure 5 It is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. Figure 5 The shown display panel and Figure 3 The difference between the shown display panel and Figure 5 In it, the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 410) on the first side 4011 is equal to the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 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, and the evaporation sources in the two evaporation chambers are respectively oriented towards the first side 4011 and the second side 4012 for evaporation. Since the angle α between the first side surface 421 and the first surface 423 is an obtuse angle, and 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, therefore, the evaporation areas 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 with the isolation structure 40 (e.g., the first part 410) on the first side 4011 is equal to the overlapping area of the first electrode 330 with the isolation structure 40 (e.g., the first part 410) on the second side 4012 (excluding the influence of process errors).

[0048] Figure 6 It is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. Figure 6 The shown display panel and Figure 1The difference between the display panel shown is that the isolation structure 40 further includes a third portion 430, and the third portion 430 is located on the side of the first portion 410 close 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 with the third portion 430 on the first side 4011 or the second side 4012.

[0049] Figure 7 It is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. Figure 7 The difference between the display panel shown and Figure 1 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 sequentially stacked along the 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, which will not be elaborated here.

[0051] In the embodiments of the present application, the light-emitting units 30 of different colors are prepared step by step. For specific reference, see Figure 9 the description in. The isolation openings 401 can be prepared step by step. For example, the corresponding isolation openings 401 can be prepared when preparing the corresponding light-emitting units 30; or, all the isolation openings 401 are prepared synchronously. For example, before preparing the light-emitting units 30, all the isolation openings 401 have been prepared. For the case where all the isolation openings 401 are prepared synchronously, since an etching solution is required during the preparation of the light-emitting units 30, the first portion 410 of the isolation structure 40 is made of metallic aluminum, and the metallic aluminum can be etched by the etching solution, resulting in an increase in the distance between the side surface of the first portion 410 and the side surface of the second portion 420, that is, an increase in the shielding area (shadow). It is not easy for the cathode material to be evaporated onto the side surface of the isolation structure 40, resulting in a decrease in the overlapping area or poor overlapping between the first electrode 330 corresponding to the later-evaporated light-emitting unit 30 and the isolation structure 40. To address this technical problem, in the embodiments of the present application, the structures of the second portions 420 corresponding to different isolation openings 401 are different, as specifically shown in Figure 8 shown.

[0052] Figure 8 It is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. As shown in 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 this embodiment of the present application mainly elaborates on the differences from the above embodiment. For the same structures in this embodiment of the present application and the above embodiment, reference can be made to the description in the above embodiment, and details will not be repeated here.

[0053] In this 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 part 410 and a second part 420 that are sequentially stacked in a direction away from the substrate 10. The orthographic projection of the first part 410 on the substrate 10 is located within the orthographic projection of the second part 420 on the substrate 10. The second part 420 includes a first surface 423 close to the substrate 10 and a second surface 424 away from the substrate 10. The plurality of 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 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 second part 420 further 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 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, and 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 this embodiment of the present application, the first isolation opening 402 is the isolation opening 401 corresponding to the light-emitting unit 30 prepared later. At this time, the first angle μ1 corresponding to the first isolation opening 402 is set as an obtuse angle. During evaporation, the cathode material is easily evaporated onto the sidewall of the isolation structure 40, ensuring an effective overlap area and avoiding display dark spots caused by poor overlap. In addition, the design of the present application can ensure that the overlap area between the cathode material and the isolation structure 40 is basically the same in different isolation openings 401, improving display uniformity.

[0054] Optionally, the second part 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. For the case of double-sided overlap, the overlap area between the first electrode 330 and the isolation structure 40 on the first sub-side 4021 and the second sub-side 4022 can be the same (excluding process effects).

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

[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 has a relatively arranged fifth sub-side 4041 and a sixth sub-side 4042. The second part 420 further includes a fifth sub-side surface 4215 located at the fifth sub-side 4041 and facing the third isolation opening 404 and a sixth sub-side surface 4216 located at the sixth sub-side 4042 and facing the third isolation opening 404. The included angle between the fifth sub-side surface 4215 and the first surface 423 is a fifth included angle μ5, and the included angle between the sixth sub-side surface 4216 and the first surface 423 is a sixth included angle μ6. The fifth included angle μ5 is smaller than the second included angle μ2. Optionally, the fifth included angle μ5 is equal to the sixth included angle μ6. As Figure 8 shown, the fifth included angle μ5 and / or the sixth included angle μ6 is an acute angle. In other embodiments, the fifth included angle μ5 and / or the sixth included angle μ6 is an obtuse angle. In this way, the overlapping area between the first electrode 330 and the isolation structure 40 can be further increased, and the impedance can be reduced.

[0057] Optionally, the first sub-side 4021 and the second sub-side 4022 are relatively arranged along the first direction ( Figure 8 the x direction in

[0058] ). The third sub-side 4031 and the fourth sub-side 4032 are relatively arranged along the first direction. The fifth sub-side 4041 and the sixth sub-side 4042 are relatively arranged along the first direction. Figure 6In the third part 430), the third part is located on the side of the first part 410 close to the substrate, and the orthographic projection of the first part 410 on the substrate 10 is located within the orthographic projection of the third part on the substrate. Optionally, the first electrode 330 overlaps with the third part on the first sub-side 4021, the third sub-side 4031 or the fifth sub-side 4041. And / or, the first electrode 330 overlaps with the third part on the second sub-side 4022, the fourth sub-side 4032 or the sixth sub-side 4042. Alternatively, the first electrode 330 overlaps with both the first part 410 and the third part at the same time, and the embodiments of the present application do not limit this.

[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. Among them, the third light-emitting unit is the light-emitting unit prepared first, the second light-emitting unit is the light-emitting unit prepared second, and the first light-emitting unit is the light-emitting unit prepared last. 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 sequentially and repeatedly arranged along the first direction.

[0061] Optionally, as Figure 8 shown, the second part 420 of the isolation structure 40 (for example, Figure 8 the isolation structure 42 in Figure 8 between the first isolation opening 402 and the second isolation opening 403) has a trapezoidal shape in the cross-section perpendicular to the substrate 10. The second part 420 of the isolation structure 40 (for example, Figure 8 the isolation structure 43 in Figure 8 between the second isolation opening 403 and the third isolation opening 404) has a regular trapezoidal shape in the cross-section perpendicular to the substrate 10. The second part 420 of the isolation structure 40 (for example, Figure 8 the isolation structure 44 in

[0062] between the third isolation opening 404 and the first isolation opening 402) has a parallelogram shape in the cross-section perpendicular to the substrate 10. In Figure 8 the trapezoid includes a right trapezoid, and / or, the regular trapezoid includes a right trapezoid. It should be noted that Figure 8 only one specific structure is shown. In other embodiments, it is only necessary to ensure that the first included angle μ1 is greater than the second included angle μ2, and the second included angle μ2 is greater than the fifth included angle μ5. For example, in other embodiments, the first included angle μ1, the second included angle μ2, and the fifth included angle μ5 can all be obtuse angles. In this way, the overlapping area between the first electrode 330 and the isolation structure 40 can be increased.

[0062] In the embodiment of the present application, the distance h1 between the orthographic projection of the side wall of the first part 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 surface 4211 on the substrate 10 is greater than the distance h2 between the orthographic projection of the side wall of the first part 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 surface 4213 on the substrate 10; and / or, the distance h2 between the orthographic projection of the side wall of the first part 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 surface 4213 on the substrate 10 is greater than the distance h3 between the orthographic projection of the side wall of the first part 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 surface 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 by the etching solution twice, the side etching amount is large, the side wall of the first part 410 corresponding to the second isolation opening 403 is etched by the etching solution once, 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 by the etching solution, and there is no side etching.

[0063] In the embodiment of the present application, the influence of etching in the preparation process of the isolation structure 40 is considered, and different shapes of the second part 420 are prepared for the isolation openings 401 corresponding to different light-emitting units 30, so that the first electrode 330 and the isolation structure 40 have a sufficient overlapping area, and display dark spots or gray spots caused by poor overlapping are avoided. Since the light-emitting units are prepared step by step, the side walls (mainly aluminum side walls) of the isolation structure in the isolation openings corresponding to the later-prepared light-emitting units are over-etched, resulting in difficulty in ensuring that the cathode material is evaporated onto the side walls of the isolation structure when evaporating the first electrode material (cathode material). In this solution, the shapes of the second parts corresponding to different isolation openings are different, and the first angle of the second part of the isolation opening corresponding to the later-prepared light-emitting unit is an obtuse angle. In this way, during evaporation, the cathode material is more likely to be evaporated onto the side walls of the isolation structure, increasing the overlapping area between the first electrode and the isolation structure, increasing the continuity of the cathode, reducing the overlapping impedance, and improving the display effect. And in this solution, it can be ensured that the overlapping areas of different isolation openings are basically the same, further improving the display uniformity.

[0064] Optionally, the display panel further includes a pixel definition layer 20, and the pixel definition layer 20 encloses a plurality of pixel openings 201, and the orthographic projection of the pixel openings 201 on the substrate 10 overlaps with the orthographic projection 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 relief opening, and the isolation structure 40 is located in the relief 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 sequentially stacked in a direction away from the substrate 10, and a part of the second electrode 310 is exposed through the pixel opening 201.

[0066] Optionally, the display panel further includes a first encapsulation layer (for example, Figure 7 the first encapsulation layer 510 shown). The first encapsulation layer includes a plurality of encapsulation units corresponding to the light-emitting units 30, and the orthographic projection of the encapsulation unit on the substrate 10 overlaps with the orthographic projection 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 shown) that are sequentially stacked in a direction away from the substrate 10. The second encapsulation layer is located on a side of the first encapsulation layer away from the substrate 10.

[0067] An embodiment of the present application further provides a display panel, specifically as Figure 8 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 part 410 and a second part 420 that are sequentially stacked 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 sequentially and repeatedly arranged. The second part 420 of the isolation structure (for example, Figure 8 the isolation structure 42) between the first isolation opening 402 and the second isolation opening 403 includes a right trapezoid in a cross-section perpendicular to the substrate 10. The second part 420 of the isolation structure (for example, Figure 8 the isolation structure 43) between the second isolation opening 403 and the third isolation opening 404 includes a regular trapezoid in a cross-section perpendicular to the substrate 10. The second part 420 of the isolation structure (for example, Figure 8 the isolation structure 44) between the third isolation opening 404 and the first isolation opening 402 includes a parallelogram in a cross-section perpendicular to the substrate 10. In the embodiment of the present application, different shapes of the second part 420 are prepared for the isolation openings 401 corresponding to different light-emitting units 30, so that the first electrode 330 and the isolation structure 40 have a sufficient overlapping area, avoiding display dark spots or gray spots caused by poor overlapping.

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

[0069] Optionally, the isolation structure (for example, Figure 8The orthographic projection on the substrate 10 of the first part 410 of the isolation structure 42) in [reference] onto the sidewall of the first isolation opening 402 is separated from the isolation structure between the first isolation opening 402 and the second isolation opening 403 (e.g., Figure 8 the distance h1 between the orthographic projection on the substrate 10 of the second part 420 of the isolation structure 42) in [reference] onto the sidewall of the first isolation opening 402 is greater than the isolation structure between the first isolation opening 402 and the second isolation opening 403 (e.g., Figure 8 the orthographic projection on the substrate 10 of the first part 410 of the isolation structure 42) in [reference] onto the sidewall of the second isolation opening 403 is separated from the isolation structure between the first isolation opening 402 and the second isolation opening 403 (e.g., Figure 8 the distance between the orthographic projection on the substrate 10 of the second part 420 of the isolation structure 42) in [reference] onto the sidewall of the second isolation opening 403; and / or, the isolation structure between the second isolation opening 403 and the third isolation opening 404 (e.g., Figure 8 the orthographic projection on the substrate 10 of the first part 410 of the isolation structure 43) in [reference] onto the sidewall of the second isolation opening 403 is separated from the isolation structure between the second isolation opening 403 and the third isolation opening 404 (e.g., Figure 8 the distance between the orthographic projection on the substrate 10 of the second part 420 of the isolation structure 43) in [reference] onto the sidewall of the second isolation opening 403 is greater than the isolation structure between the second isolation opening 403 and the third isolation opening 404 (e.g., Figure 8 the orthographic projection on the substrate 10 of the first part 410 of the isolation structure 43) in [reference] onto the sidewall of the third isolation opening 404 is separated from the isolation structure between the second isolation opening 403 and the third isolation opening 404 (e.g., Figure 8 the distance between the orthographic projection on the substrate 10 of the second part 420 of the isolation structure 43) in [reference] onto the sidewall of the third isolation opening 404; and / or, the isolation structure between the third isolation opening 404 and the first isolation opening 402 (e.g., Figure 8 the orthographic projection on the substrate 10 of the first part 410 of the isolation structure 44) in [reference] onto the sidewall of the third isolation opening 404 is separated from the isolation structure between the third isolation opening 404 and the first isolation opening 402 (e.g., Figure 8 the distance between the orthographic projection on the substrate 10 of the second part 420 of the isolation structure 44) in [reference] onto the sidewall of the third isolation opening 404 is less than the isolation structure between the third isolation opening 404 and the first isolation opening 402 (e.g., Figure 8 the orthographic projection on the substrate 10 of the first part 410 of the isolation structure 44) in [reference] onto the sidewall of the first isolation opening 402 is separated from the isolation structure between the third isolation opening 404 and the first isolation opening 402 (e.g., Figure 8The distance between the second part 420 of the isolation structure 44) in [description] and the orthographic projection of the side wall of 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 sequentially and repeatedly arranged in the first direction.

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

[0071] The embodiments of the present application further provide a method for manufacturing a display panel, including: preparing an isolation structure on a substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure including a first part and a second part sequentially stacked along a direction away from the substrate, the orthographic projection of the first part on the substrate being located within the orthographic projection of the second part on the substrate, the second part including a first surface close to the substrate and a second surface away from the substrate, the plurality of isolation openings including 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 part further including 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 included angle between the first sub-side surface and the first surface being a first included angle, the included angle between the third sub-side surface and the first surface being a second included angle, the first included angle being an obtuse angle, and the first included angle being greater than the second included angle. Since the light-emitting units are prepared step by step, over-etching exists in the side walls (mainly aluminum side walls) of the isolation structure in the isolation openings corresponding to the later-prepared light-emitting units, resulting in difficulty in ensuring that the cathode material is evaporated onto the side walls of the isolation structure when evaporating the first electrode material (cathode material). In this solution, the shapes of the second parts corresponding to different isolation openings are different, and the first included angle of the second part of the isolation opening corresponding to the later-prepared light-emitting unit is an obtuse angle. In this way, during evaporation, the cathode material is more likely to be evaporated onto the side walls of the isolation structure, increasing the overlapping area between the first electrode and the isolation structure, increasing the continuity of the cathode, reducing the overlapping impedance, and improving the display effect. And in this solution, it can be ensured that the overlapping areas of different isolation openings are basically the same, further improving the display uniformity.

[0072] Figure 9 is a schematic flowchart of the method for manufacturing a display panel provided by an embodiment of the present application. As Figure 9 shown, the method includes the following steps.

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

[0074] In the embodiments of the present application, in order to prepare as Figures 1 to 8The isolation structure shown, the preparation of the isolation structure includes the following steps. 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 intermediate portion. It should be noted that when the second material layer is subjected to the first patterning process, a part of the first material layer is also subjected to the first patterning process. After that, the second intermediate 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 the embodiments 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 can be Figures 1 to 8 the isolation structure in the display panel shown.

[0075] Optionally, before preparing the isolation structure, the preparation method further includes preparing a plurality of second electrodes on the substrate; preparing an insulating material layer on the side of the second electrode away from the substrate; and, after preparing the isolation structure, the preparation method further includes: patterning the insulating material layer to form a pixel definition layer. The pixel definition layer encloses a plurality of pixel openings, the orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate, and the pixel openings expose at least a part of the second electrodes.

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

[0077] It should be noted that for Figure 8The isolation structure shown, after preparing the first material layer and the second material layer, patterns the first material layer and the second material layer according to the preparation sequence of the light-emitting units, that is, prepares the isolation openings step by step. Exemplarily, first prepare the third light-emitting unit. Before preparing the third light-emitting unit, it is necessary to first prepare the third isolation opening. Since the side walls of the isolation structure corresponding to the third isolation opening will not be etched by the etching solution, therefore, the second material layer corresponding to the third isolation opening can be patterned only once. Specifically, perform a first patterning process on the second material layer corresponding to the third isolation opening, and perform a third patterning process 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, it is necessary to first prepare the second isolation opening. Since the side walls of the isolation structure corresponding to the second isolation opening will be etched by the etching solution once, therefore, the second material layer corresponding to the second isolation opening needs to be patterned twice. Specifically, sequentially perform a first patterning process and a second patterning process on the second material layer corresponding to the second isolation opening, and perform a third patterning process 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 first prepare the first isolation opening. Since the side walls of the isolation structure corresponding to the first isolation opening will be etched by the etching solution twice, therefore, the second material layer corresponding to the first isolation opening needs to be patterned twice. Specifically, sequentially perform a first patterning process and a second patterning process on the second material layer corresponding to the first isolation opening, and perform a third patterning process on the second material layer 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, and the difference lies in the etching degree of the second patterning process for the first isolation opening, the second isolation opening, and the third isolation opening.

[0078] As 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. The second part 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, a fifth sub-side surface 4215 located on the fifth sub-side 4041 and facing the third isolation opening 404, and a sixth sub-side surface 4216 located on the sixth sub-side 4042 and facing the third isolation opening 404. Among them, 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. Among them, the first angle μ1 and / or the third angle μ3 is an obtuse angle, the second angle μ2 and / or the fourth angle μ4 is a right angle, and the fifth angle μ5 and / or the sixth angle μ6 is an acute angle.

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

[0080] Optionally, when preparing the first electrode, for Figures 1 to 3 the display panel with single-sided overlap in Figure 4 or Figure 5 a two-sided overlap display panel in

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

[0082] Optionally, the fifth included 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-etched, the cathode material can be lapped onto the isolation structure 40, and a sufficient lapping area can be ensured.

[0083] Optionally, the second included 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 that of the fifth sub-side surface on the cathode material. Since the side walls of the isolation structure 40 in the second isolation opening 403 are side-etched once, in this way, it can be ensured that the lapping area in the second isolation opening 403 is basically the same as the lapping area in the third isolation opening 404.

[0084] Optionally, since the first included angle μ1 is an obtuse angle, when preparing the first electrode 330 in the first isolation opening 402, the evaporation direction of the evaporation source and the angle perpendicular to the substrate direction are less than the angle between the first sub-side surface and the perpendicular to the substrate direction. In this way, the first sub-side surface will not block the evaporated cathode material, increasing the evaporation height and improving the lapping area. Since the side walls of the isolation structure 40 in the first isolation opening 402 are side-etched twice and the first part 410 retreats more, therefore, in order to ensure an effective lapping area, the first included angle μ1 is set as an obtuse angle to ensure a sufficient lapping area.

[0085] Optionally, before the step of preparing the first electrode in the isolation opening, the manufacturing method further includes: preparing a light-emitting functional layer in the isolation opening. The second electrode, the light-emitting functional layer, and the first electrode form a light-emitting unit. After the step of preparing the first electrode in the isolation opening, the manufacturing method further includes: preparing a first encapsulation layer on the side of the first electrode away from the substrate. The first encapsulation layer includes a plurality of encapsulation units, and the orthographic projection of the encapsulation unit on the substrate overlaps with the orthographic projection of the light-emitting unit on the substrate.

[0086] It should be noted that in the embodiments of the present application, the light-emitting units of different colors are prepared step by step. 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, and the third preparation material layer corresponding to the third isolation opening is reserved to form a light-emitting functional layer, a first electrode and a packaging unit corresponding to the third light-emitting unit; 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, and the second preparation material layer corresponding to the second isolation opening is reserved to form a light-emitting functional layer, a first electrode and a packaging unit corresponding to the second light-emitting unit; 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, and the first preparation material layer corresponding to the first isolation opening is reserved to form a light-emitting functional layer, a first electrode and a packaging unit corresponding to the first light-emitting unit.

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

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

[0089] Figure 10 It is a schematic structural diagram of a display device provided by an embodiment of the present application. As Figure 10 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 can be a notebook computer, a mobile phone, a handheld or portable computer, a camera, a video camera, an in-vehicle intelligent 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 the display panel provided in any of the above embodiments. The display panel can be an organic light-emitting diode display panel or a quantum dot electroluminescent display panel.

[0092] In addition, the display device 1000 can also have functions such as photographing, video recording, fingerprint recognition, and face recognition. Correspondingly, the display device 1000 further 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 in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are only for illustrative and facilitating understanding purposes and not for limitation. The above details do not limit the present application to necessarily implement using the above specific details.

[0094] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms meaning "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or" and can be used interchangeably with it, 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 with it.

[0095] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations 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 are very obvious to those skilled in the art, and the general principles defined herein can 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 the broadest scope consistent with the principles and novel features disclosed herein.

[0097] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

[0098] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, Comprising: A substrate; An isolation structure located on one side of the substrate. The isolation structure encloses a plurality of isolation openings. The isolation structure includes a first part and a second part stacked in sequence along a direction away from the substrate. The orthographic projection of the first part on the substrate is located within the orthographic projection of the second part on the substrate. The second part 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 part further includes 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 included angle between the first sub-side surface and the first surface is a first included angle, and the 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.

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

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

4. The display panel according to claim 1, wherein The plurality of isolation openings further include a third isolation opening. The third isolation opening has a fifth sub-side and a sixth sub-side arranged oppositely. The second part further 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 included angle between the fifth sub-side surface and the first surface is a fifth included angle, and the included angle between the sixth sub-side surface and the first surface is a sixth included angle. The fifth included angle is less than the second included angle.

5. The display panel according to claim 4, wherein The cross-sectional shape of the second part of the isolation structure between the first isolation opening and the second isolation opening in a direction perpendicular to the substrate includes an inverted trapezoid. The cross-sectional shape of the second part of the isolation structure between the second isolation opening and the third isolation opening in a direction perpendicular to the substrate includes a regular trapezoid. The cross-sectional shape of the second part of the isolation structure between the third isolation opening and the first isolation opening in a direction perpendicular to the substrate includes a parallelogram.

6. The display panel according to claim 5, characterized in that, The inverted trapezoid includes a right trapezoid; and / or, the regular trapezoid includes a right trapezoid.

7. The display panel according to claim 4, characterized in that, The distance between the positive projection of the side wall of the first part, which is located on the first sub-side and faces the first isolation opening, on the substrate and the positive projection of the first sub-side on the substrate is greater than the distance between the positive projection of the side wall of the first part, which is located on the third sub-side and faces the second isolation opening, on the substrate and the positive projection of the third sub-side on the substrate; the distance between the positive projection of the side wall of the first part, which is located on the third sub-side and faces the second isolation opening, on the substrate and the positive projection of the third sub-side on the substrate is greater than the distance between the positive projection of the side wall of the first part, which is located on the fifth sub-side and faces the third isolation opening, on the substrate and the positive projection of the fifth sub-side on the substrate.

8. The display panel according to claim 4, wherein The display panel further includes a plurality of light-emitting units, at least a part of the light-emitting units is located in the isolation opening, the light-emitting unit includes a first electrode, and the first electrode is lapped with the isolation structure on the first sub-side, the third sub-side or the fifth sub-side; and / or, the first electrode is lapped with the isolation structure on the second sub-side, the fourth sub-side or the sixth sub-side.

9. The display panel according to claim 8, wherein, The first electrode is lapped with the first part on the first sub-side, the third sub-side or the fifth sub-side; and / or, the first electrode is lapped with the isolation structure on the second sub-side, the fourth sub-side or the sixth sub-side.

10. The display panel according to claim 8, wherein The isolation structure further includes a third part, the third part is located on the side of the first part close to the substrate, and the positive projection of the first part on the substrate is located within the positive projection of the third part on the substrate; the first electrode is lapped with the third part on the first sub-side, the third sub-side or the fifth sub-side; and / or, the first electrode is lapped with the third part on the second sub-side, the fourth sub-side or the sixth sub-side.

11. The display panel according to any one of claims 1 to 10, characterized in that, The display panel further includes a pixel definition layer, the pixel definition layer encloses a plurality of pixel openings, and the positive projection of the pixel openings on the substrate overlaps with the positive projection of the isolation openings on the substrate; and / or, The light-emitting unit further includes a second electrode and a light-emitting functional layer, the second electrode, the light-emitting functional layer and the first electrode are sequentially stacked in a direction away from the substrate, and a part of the second electrode is exposed by the pixel opening; 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 positive projection of the encapsulation units on the substrate overlaps with the positive projection of the light-emitting units on the substrate; and / or, The display panel further includes a second encapsulation layer and a third encapsulation layer that are sequentially stacked in a direction away from the substrate, and the second encapsulation layer is located on the side of the first encapsulation layer away from the substrate.

12. A display panel, characterized in that, Comprising: 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 part and a second part that are stacked in sequence along 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 and repeatedly arranged. The cross-sectional shape of the second part of the isolation structure between the first isolation opening and the second isolation opening in a direction perpendicular to the substrate includes an inverted trapezoid. The cross-sectional shape of the second part of the isolation structure between the second isolation opening and the third isolation opening in a direction perpendicular to the substrate includes a regular trapezoid. The cross-sectional shape of the second part of the isolation structure between the third isolation opening and the first isolation opening in a direction perpendicular to the substrate includes a parallelogram.

13. The display panel according to claim 12, wherein The inverted trapezoid includes a right trapezoid, and / or the regular trapezoid includes a right trapezoid.

14. The display panel according to claim 12, wherein, The distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the first isolation opening and the second isolation opening facing the first isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the first isolation opening and the second isolation opening facing the first isolation opening is greater than the distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the first isolation opening and the second isolation opening facing the second isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the first isolation opening and the second isolation opening facing the second isolation opening; and / or, The distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the second isolation opening and the third isolation opening facing the second isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the second isolation opening and the third isolation opening facing the second isolation opening is greater than the distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the second isolation opening and the third isolation opening facing the third isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the second isolation opening and the third isolation opening facing the third isolation opening; and / or, The distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the third isolation opening and the first isolation opening facing the third isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the third isolation opening and the first isolation opening facing the third isolation opening is less than the distance between the orthographic projection on the substrate of the side wall of the first part of the isolation structure between the third isolation opening and the first isolation opening facing the first isolation opening and the orthographic projection on the substrate of the side wall of the second part of the isolation structure between the third isolation opening and the first isolation opening facing the first isolation opening.

15. The display panel according to claim 12, wherein The first isolation opening, the second isolation opening, and the third isolation opening are sequentially and repeatedly arranged along a first direction; the first isolation opening includes a first sub-side and a second sub-side oppositely arranged along the first direction, the second isolation opening includes a third sub-side and a fourth sub-side oppositely arranged along the first direction, and the third isolation opening includes a fifth sub-side and a sixth sub-side oppositely arranged along the first direction; the second part includes a first surface close to the substrate and a second surface far from the substrate, the second part further 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 included angle between the first sub-side surface and the first surface is a first included angle, the included angle between the third sub-side surface and the first surface is a second included angle, the included angle between the fifth sub-side surface and the first surface is a fifth included angle, the first included angle is greater than the second included angle, and the second included angle is greater than the fifth included angle.

16. The display panel according to claim 15, wherein, The first included angle is an obtuse angle, and / or, the second included angle is a right angle or an obtuse angle, and / or, the fifth included angle is an acute angle or an obtuse angle.

17. The display panel according to claim 15, wherein, The second part further includes a second sub-side surface located on the second sub-side and facing the first isolation opening, the included angle between the second sub-side surface and the first surface is a third included angle, and the third included angle is equal to the first included angle; and / or, the second part further includes a fourth sub-side surface located on the fourth sub-side and facing the second isolation opening, the included angle between the fourth sub-side surface and the first surface is a fourth included angle, the fourth included angle is less than the first included angle, and the fourth included angle is equal to the second included angle; and / or, the second part further includes a sixth sub-side surface located on the sixth sub-side and facing the third isolation opening, the included angle between the sixth sub-side surface and the first surface is a sixth included angle, and the sixth included angle is equal to the fifth included angle.

18. A method for manufacturing a display panel, characterized in that, Comprising: An isolation structure is prepared on a substrate. The isolation structure encloses a plurality of isolation openings. The isolation structure includes a first part and a second part which are sequentially stacked along a direction away from the substrate. A positive projection of the first part on the substrate is located within a positive projection of the second part on the substrate. The second part 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 which are oppositely arranged. The second isolation opening has a third sub-side and a fourth sub-side which are oppositely arranged. The second part further includes 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 included angle between the first sub-side surface and the first surface is a first included angle, and 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.

19. The method for manufacturing a display panel according to claim 18, wherein, The preparation of the isolation structure on the 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 intermediate part; performing a second patterning process on the second intermediate part to obtain the second part; performing a third patterning process on the first material layer to obtain the first part; and / or, 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, an evaporation direction of an evaporation source forms an included angle with a direction perpendicular to the substrate that is smaller than an included angle between the first sub-side surface and the direction perpendicular to the substrate.

20. A display device, characterized in that, a display panel including any one of claims 1 to 17, or a display panel prepared by the method according to claim 18 or 19.

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