Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate; the pixel definition layer comprises a pixel definition part which is enclosed to form a pixel opening; the light-emitting units are arranged on the substrate and at least partially located in the pixel openings. The side wall, facing the pixel opening, of the pixel defining part comprises a first wall part and a second wall part; a first included angle between the first wall part and one side, close to the substrate, of the pixel definition part is larger than a second included angle between the second wall part and one side, close to the substrate, of the pixel definition part; the first side of the second electrode of the light-emitting unit extends to the surface of the side, away from the substrate, of the pixel defining part through the second wall part. According to the display panel, the pixel opening area and the light-emitting area are effectively increased, and the light-emitting efficiency is improved.

Description

Technical Field

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

[0002] Display panels, such as organic light-emitting diodes (OLEDs), are organic thin-film electroluminescent devices that have attracted great attention and are widely used in electronic display products due to their advantages such as simple preparation process, low cost, low power consumption, high brightness, wide viewing angle, high contrast, and flexible display.

[0003] However, the display performance of existing display panels needs to be improved. Summary of the invention

[0004] The display panel and display device provided in the present application are intended to improve the display performance of the display panel.

[0005] In order to solve the above technical problems, the first technical solution adopted by the present application is to provide a display panel. The display panel includes: a substrate; a pixel definition layer, which is arranged on the substrate, and the pixel definition layer includes a pixel definition part, and the pixel definition part encloses a pixel opening;

[0006] A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located at the pixel opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0007] Wherein, the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion;

[0008] A first angle between the first wall portion and a side of the pixel definition portion close to the substrate is greater than a second angle between the second wall portion and a side of the pixel definition portion close to the substrate;

[0009] The first side of the second electrode extends through the second wall portion to a surface of the pixel definition portion that is away from the substrate.

[0010] In one embodiment of the present application, the first angle is greater than or equal to 60° and less than or equal to 90°;

[0011] Optionally, the second angle is less than 60°;

[0012] Optionally, the second angle is greater than 30° and less than 60°;

[0013] Optionally, the first angle is greater than 75° and less than 90°; and the second angle is greater than 30° and less than 60°;

[0014] Optionally, along the direction away from the pixel opening, the distance between the first wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases; or, the first wall portion is perpendicular to the side of the pixel definition portion away from the substrate;

[0015] Along the direction away from the pixel opening, the distance between the second wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases.

[0016] In one embodiment of the present application, a distance between an orthographic projection of a side of the first wall portion away from the substrate and a side of the first wall portion close to the substrate on the substrate is smaller than a distance between an orthographic projection of a side of the second wall portion away from the substrate and a side of the second wall portion close to the substrate on the substrate;

[0017] Optionally, along the thickness direction of the substrate, a first distance between a side of the first wall away from the substrate and a side of the pixel definition portion close to the substrate is equal to a second distance between a side of the second wall away from the substrate and a side of the pixel definition portion close to the substrate.

[0018] In one embodiment of the present application, the first wall portion and the second wall portion corresponding to the same pixel opening are arranged along the circumference of the pixel opening;

[0019] Optionally, along the circumferential direction of the pixel opening, a first ratio of the length of the first wall portion to the circumference of the pixel opening is greater than or equal to 25% and less than or equal to 80%; a second ratio of the length of the second wall portion to the circumference of the pixel opening is greater than or equal to 10% and less than or equal to 25%;

[0020] Optionally, the side wall of the pixel definition portion facing the pixel opening includes a first side wall, a second side wall, a fourth side wall and a third side wall sequentially arranged along the circumferential direction of the pixel opening; the first wall portion includes at least one of the first side wall, the second side wall and the fourth side wall; the second wall portion includes the third side wall;

[0021] Optionally, the angles between the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate are all greater than or equal to 60° and less than or equal to 90°; or the angles between the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate are all equal to 90°; or the angle between one or more of the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate is greater than or equal to 60° and less than 90°, and the angle between one or more of the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate is equal to 90°.

[0022] In one embodiment of the present application, the pixel definition portion encloses a plurality of pixel openings; the light emitting unit includes a blue light emitting unit, a red light emitting unit, and a green light emitting unit;

[0023] Wherein, the ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all blue light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 10% and less than or equal to 20%;

[0024] The ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all the red light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 5% and less than or equal to 15%;

[0025] The ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all green light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 3% and less than or equal to 12%;

[0026] Optionally, the thickness of the pixel definition layer is greater than or equal to 3000 angstroms and less than or equal to 10000 angstroms.

[0027] In one embodiment of the present application, the second side of the second electrode opposite to the first side is disconnected at the first wall portion; the first side of the second electrode extends continuously to a surface of a side of the pixel definition portion away from the substrate;

[0028] Optionally, the first side of the light-emitting functional layer extends continuously on the second wall portion to a surface of the pixel definition portion facing away from the substrate; and the second side of the light-emitting functional layer opposite to the first side is disconnected at the first wall portion;

[0029] Optionally, a thickness of a portion of the second electrode within the pixel opening is greater than or equal to 80 angstroms and less than or equal to 170 angstroms.

[0030] In one embodiment of the present application, an isolation structure is further included, the isolation structure encloses an isolation opening, and the isolation opening is connected to the corresponding pixel opening.

[0031] The first side of the second electrode extends continuously from the second wall portion to a surface of a side of the pixel definition portion away from the substrate, and the first side of the second electrode overlaps with a side wall of the isolation structure facing the isolation opening;

[0032] Optionally, the isolation structure comprises a conductive material;

[0033] Optionally, in a cross section of the isolation structure passing through the central axis of the isolation opening and perpendicular to the substrate, the first wall portion and / or the second wall portion is in a straight line, a curve or a broken line shape.

[0034] In one embodiment of the present application, the orthographic projection of the side wall of the isolation structure facing the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate;

[0035] Optionally, the side wall of the isolation structure facing the isolation opening includes a third wall portion close to the first wall portion and a fourth wall portion close to the second wall portion;

[0036] The orthographic projection of the side of the third wall away from the substrate on the substrate is located between the orthographic projection of the side of the first wall away from the substrate on the substrate and the orthographic projection of the side of the first wall close to the substrate on the substrate;

[0037] Alternatively, an orthographic projection of a side of the third wall portion away from the substrate on the substrate and an orthographic projection of a side of the first wall portion away from the substrate on the substrate extend along the circumferential direction of the pixel opening and at least partially overlap;

[0038] Alternatively, the orthographic projection of the third wall portion on the substrate is spaced apart from the orthographic projection of the first wall portion on the substrate, and the orthographic projection of the third wall portion on the substrate is located on a side where the orthographic projection of the first wall portion on the substrate away from the substrate is away from the orthographic projection of the first wall portion on the substrate close to the substrate;

[0039] Optionally, the orthographic projection of the fourth wall portion on the substrate is spaced apart from the orthographic projection of the second wall portion on the substrate, and the orthographic projection of the fourth wall portion on the substrate is located on a side where the orthographic projection of the second wall portion on the substrate away from the substrate is away from the orthographic projection of the second wall portion on the substrate close to the substrate.

[0040] In one embodiment of the present application, the isolation structure includes:

[0041] The first isolation part,

[0042] The second isolation portion is provided on a surface of a side of the first isolation portion away from the substrate; and the orthographic projection of the side of the first isolation portion away from the substrate on the substrate is located within the orthographic projection of the second isolation portion on the substrate; the first side of the second electrode extends through the second wall portion to be electrically connected to the first isolation portion;

[0043] Optionally, the isolation structure further includes a third isolation portion, which is disposed between the first isolation portion and the substrate, and the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the third isolation portion on the substrate.

[0044] Optionally, the first side of the second electrode is in contact and electrically connected with the third isolating portion, or the first side of the second electrode is in contact and electrically connected with both the third isolating portion and the first isolating portion;

[0045] Optionally, the second isolation portion includes a conductive material.

[0046] In one embodiment of the present application, the orthographic projection of the side wall of the second isolation portion facing the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate;

[0047] Optionally, the orthographic projection of a portion of the side wall of the second isolation portion facing the isolation opening close to the first wall portion on the substrate is located between the orthographic projection of the first wall portion on the substrate away from the substrate and the orthographic projection of the first wall portion on the substrate close to the substrate;

[0048] Alternatively, the side wall of the second isolation portion facing the isolation opening includes a fifth wall portion close to the first wall portion and a sixth wall portion close to the second wall portion;

[0049] The orthographic projection of the fifth wall portion on the substrate extends along the circumferential direction of the pixel opening and at least partially overlaps with the orthographic projection of the first wall portion on the substrate away from the substrate;

[0050] Alternatively, the orthographic projection of the fifth wall portion on the substrate is spaced apart from the orthographic projection of the first wall portion on the substrate, and the orthographic projection of the fifth wall portion on the substrate is located on a side where the orthographic projection of the first wall portion on the substrate away from the substrate is away from the orthographic projection of the first wall portion on the substrate close to the substrate;

[0051] Optionally, the orthographic projection of the sixth wall portion on the substrate is spaced apart from the orthographic projection of the second wall portion on the substrate, and the orthographic projection of the sixth wall portion on the substrate is located on a side where the orthographic projection of the second wall portion on the substrate away from the substrate is away from the orthographic projection of the second wall portion on the substrate close to the substrate;

[0052] Optionally, a first spacing distance between an orthographic projection of a side of the sixth wall portion close to the substrate on the substrate and an orthographic projection of a side of the first isolation portion facing the isolation opening on the substrate is equal to a second spacing distance between an orthographic projection of a side of the fifth wall portion close to the substrate on the substrate and an orthographic projection of a side of the first isolation portion facing the isolation opening on the substrate;

[0053] Optionally, the isolation structure is located on a side of the pixel definition portion away from the substrate, or the pixel definition layer is provided with a clearance opening, and the isolation structure is located in the clearance opening.

[0054] In one embodiment of the present application, the pixel definition layer is provided with a plurality of pixel openings;

[0055] The first angles corresponding to different pixel openings are the same; and / or; the second angles corresponding to different pixel openings are the same; or;

[0056] The first angles corresponding to different pixel openings are different; and / or; the second angles corresponding to different pixel openings are different; or;

[0057] The first angles corresponding to different pixel openings are the same, and the second angles corresponding to different pixel openings are different; or

[0058] The first angles corresponding to different pixel openings are different, and the second angles corresponding to different pixel openings are the same; or

[0059] Among the multiple pixel openings, some different pixel openings have the same first angle and the same second angle, and some different pixel openings have different first angles and the same second angle.

[0060] In one embodiment of the present application, a third spacing distance between an orthographic projection of the fourth wall portion on the substrate and an orthographic projection of a side of the second wall portion away from the substrate on the substrate is greater than a fourth spacing distance between an orthographic projection of the third wall portion on the substrate and an orthographic projection of a side of the first wall portion away from the substrate on the substrate;

[0061] Optionally, a fifth spacing distance between an orthographic projection of the fourth wall portion on the substrate and an orthographic projection of a side of the second wall portion close to the substrate on the substrate is greater than a sixth spacing distance between an orthographic projection of the third wall portion on the substrate and an orthographic projection of a side of the first wall portion close to the substrate on the substrate.

[0062] In one embodiment of the present application, the display panel further includes: a plurality of packaging parts, located on a side of the corresponding light-emitting unit away from the substrate;

[0063] Optionally, light-emitting units with different light-emitting colors correspond to different packaging parts;

[0064] Optionally, a plurality of packaging parts are arranged at intervals;

[0065] Optionally, the display panel further includes a first encapsulation layer located on a side of the encapsulation portion away from the substrate;

[0066] The display panel further includes a second encapsulation layer located on a side of the first encapsulation layer away from the substrate;

[0067] Optionally, the encapsulation part includes an inorganic material; the first encapsulation layer includes an organic material, and the second encapsulation layer includes an inorganic material.

[0068] In order to solve the above technical problems, the second technical solution adopted by the present application is: to provide a display panel, the display panel comprising:

[0069] substrate;

[0070] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening;

[0071] A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located in the isolation opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0072] A pixel definition layer is provided on a substrate, the pixel definition layer comprises a pixel definition portion, the pixel definition portion encloses a pixel opening; an isolation opening is connected to the corresponding pixel opening, the pixel opening exposes at least a portion of a first electrode; the side wall of the pixel definition portion facing the pixel opening comprises a first wall portion and a second wall portion; a first side of the second electrode close to the second wall portion extends continuously from the second wall portion to a side surface of the pixel definition portion away from the substrate, and overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the second wall portion; a second side of the second electrode close to the first wall portion is disconnected at the first wall portion, and an edge of the second electrode close to the first wall portion overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the first wall portion.

[0073] In one embodiment of the present application, along the direction away from the pixel opening, the distance between the first wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases; or, the first wall portion is perpendicular to the side of the pixel definition portion away from the substrate;

[0074] Along the direction away from the pixel opening, the distance between the second wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases.

[0075] Optionally, a distance between an orthographic projection of a side of the first wall portion away from the substrate and a side of the first wall portion close to the substrate on the substrate is smaller than a distance between an orthographic projection of a side of the second wall portion away from the substrate and a side of the second wall portion close to the substrate on the substrate;

[0076] Optionally, along the thickness direction of the substrate, a first distance between a side of the first wall away from the substrate and a side of the pixel definition portion close to the substrate is equal to a second distance between a side of the second wall away from the substrate and a side of the pixel definition portion close to the substrate.

[0077] In order to solve the above technical problems, the third technical solution adopted by the present application is: to provide a display panel, comprising:

[0078] substrate;

[0079] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening;

[0080] A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located in the isolation opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0081] A pixel definition layer is disposed on a substrate, the pixel definition layer includes a pixel definition portion, the pixel definition portion encloses a pixel opening; the isolation opening is connected to the corresponding pixel opening, the pixel opening exposes at least a portion of the first electrode; the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; the distance between the side of the first wall portion away from the substrate and the side of the first wall portion close to the substrate on the orthographic projection of the substrate is smaller than the distance between the side of the second wall portion away from the substrate and the side of the second wall portion close to the substrate on the orthographic projection of the substrate.

[0082] In order to solve the above technical problems, the fourth technical solution adopted by the present application is: to provide a display panel, the display panel comprising:

[0083] substrate;

[0084] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening;

[0085] A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located in the isolation opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0086] A pixel definition layer is disposed on a substrate, the pixel definition layer includes a pixel definition portion, the pixel definition portion encloses a pixel opening; the isolation opening is connected to the corresponding pixel opening, the pixel opening exposes at least a portion of the first electrode; the side wall of the pixel definition portion facing the pixel opening includes a first wall portion, the second electrode is disconnected at the first wall portion, and a first angle between the first wall portion and a side of the pixel definition portion close to the substrate is greater than or equal to 60° and less than or equal to 90°.

[0087] In one embodiment of the present application, an edge of the second electrode close to the first wall overlaps a portion of a side wall of the isolation structure facing the isolation opening close to the first wall;

[0088] The side wall of the pixel definition portion facing the pixel opening also includes a second wall portion; the first side of the second electrode close to the second wall portion extends continuously from the second wall portion to the side surface of the pixel definition portion facing away from the substrate, and the first side of the second electrode close to the second wall portion overlaps with the part of the side wall of the isolation structure facing the isolation opening close to the second wall portion.

[0089] In order to solve the above technical problems, the fifth technical solution adopted by the present application is: to provide a display panel, the display panel comprising:

[0090] substrate;

[0091] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening;

[0092] A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located in the isolation opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0093] A pixel definition layer is provided on a substrate, the pixel definition layer comprises a pixel definition portion, the pixel definition portion encloses to form a pixel opening; the isolation opening is connected to the corresponding pixel opening, the pixel opening exposes at least a portion of the first electrode; the side wall of the pixel definition portion facing the pixel opening comprises a first wall portion and a second wall portion; the second electrode is disconnected at the first wall portion, the first side of the second electrode close to the second wall portion extends continuously at the second wall portion to a side surface of the pixel definition portion away from the substrate, and overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the second wall portion; the orthographic projection of the side wall of the isolation structure close to the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate; the side wall of the isolation structure close to the isolation opening comprises a third wall portion close to the first wall portion and a fourth wall portion close to the second wall portion, the distance between the orthographic projection of the third wall portion on the substrate and the orthographic projection of the first wall portion on the substrate close to the substrate is smaller than the distance between the orthographic projection of the fourth wall portion on the substrate and the orthographic projection of the second wall portion on the substrate close to the substrate.

[0094] In order to solve the above technical problems, the sixth technical solution adopted in the present application is: to provide a display device, which includes the display panel involved above.

[0095] The beneficial effects of the embodiments of the present application are different from those of the prior art: the display panel provided by the embodiments of the present application includes a substrate, a pixel definition layer and a light-emitting unit, the pixel definition layer is arranged on the substrate, the pixel definition layer includes a pixel definition portion, the pixel definition portion encloses a pixel opening, and the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; the light-emitting unit is arranged on the substrate, and at least part of the light-emitting unit is located in the pixel opening; and the light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate. The display panel is configured such that a first angle between a first wall portion of a pixel opening and a side of a pixel definition portion close to a substrate is greater than a second angle between a second wall portion and a side of a pixel definition portion close to the substrate; and a first side of a second electrode extends through the second wall portion to a surface of a side of a pixel definition layer that is away from the substrate; thus, in the process of preparing the display panel, the sizes of the first angle and the second angle can be designed according to actual needs, and the first angle can be increased to expose more of the first electrode and increase the area of ​​the pixel opening; at the same time, the second angle can be reasonably set so that the second electrode is not easily broken when extending from the second wall portion to the pixel definition layer, and the continuity of the film layer is maintained, so that the first side of the formed second electrode is continuously extended through the second wall portion to a surface of a side of the pixel definition layer that is away from the substrate, so as to realize an effective electrical connection between the second electrode and other devices; thereby, while ensuring the normal electrical connection of the second electrode, the light-emitting area of ​​the display panel is increased and the light-emitting efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0097] Figure 1 A simplified cross-sectional structural diagram of a display panel provided in one embodiment of the present application;

[0098] Figure 2 for Figure 1 Another schematic cross-sectional structure diagram of the display panel shown;

[0099] Figure 3 A top view of a pixel opening on a pixel definition layer provided in an embodiment of the present application;

[0100] Figure 4 for Figure 3 AA section view of the structure shown;

[0101] Figure 5 A schematic cross-sectional structure diagram of a display panel provided in another embodiment of the present application;

[0102] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of a pixel opening defined by a pixel definition layer is shown;

[0103] Figures 7 to 9 A schematic diagram of a cross-sectional structure of a display panel provided in different embodiments of the present application;

[0104] Fig.10 A schematic cross-sectional structure diagram of an electronic device provided in one embodiment of the present application.

[0105] Description of Reference Numerals

[0106] 100 electronic device; 10 display panel; 1 substrate; 11 underlay; 12 driving circuit layer; 2 pixel definition layer; 20 pixel definition portion; 21 pixel opening; b1 first side wall; b2 second side wall; b3 fourth side wall; b4 third side wall; 22 first wall portion; 23 second wall portion; 3 light-emitting unit; 31 first electrode; 32 light-emitting functional layer; 33 second electrode; 4 isolation structure; 40 isolation opening; 41 first isolation portion; 42 second isolation portion; Y stacking direction; 50 packaging portion; 51 first packaging layer; 52 second packaging layer; L1 first spacing distance; L2 second spacing distance; L3 third spacing distance; L4 fourth spacing distance; L5 fifth spacing distance; L6 sixth spacing distance. DETAILED DESCRIPTION

[0107] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0108] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0109] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0110] The composition, preparation and other contents of the isolation structure (or partition structure or isolation column) mentioned below are described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 0 99072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A for reference.

[0111] In the process of forming the cathode, due to the influence of the continuity of the cathode, the inclination angle of the inner wall surface of the pixel opening cannot be too large; however, if the inclination angle of the inner wall surface of the pixel opening is too small, the extension length of the inner wall surface of the pixel opening in the direction perpendicular to the stacking direction of the display panel will be longer, resulting in a smaller area of ​​the pixel opening, which affects the luminescence and product performance of the display panel.

[0112] To this end, an embodiment of the present application provides a new display panel that can ensure the continuity of the cathode to effectively connect it electrically with other devices; and the area of ​​the pixel opening is large, thereby improving the luminous efficiency and product performance of the display panel.

[0113] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0114] See also Figure 1 and Figure 2 , Figure 1 A cross-sectional structural diagram of a display panel provided in one embodiment of the present application; Figure 2 for Figure 1 Another cross-sectional structural schematic diagram of the display panel is shown. In this embodiment, a display panel is provided, the display panel includes a display area and a frame area; the display area is used to display images during operation. The frame area is arranged around at least part of the display area. The display panel includes a substrate 1, a pixel definition layer 2 and a light-emitting unit 3.

[0115] For example, the substrate 1 may include a substrate 11 and a driving circuit layer 12. Or, the substrate 1 may include a substrate 11. The display panel includes a driving circuit layer 12 located on the substrate 11. The substrate 11 plays a supporting role in the display panel 10, and it may be a flexible substrate or a rigid substrate. When the substrate 11 is a flexible substrate, its material may be polyimide (PI), or it may be a multilayer structure in which organic layers and inorganic layers are alternately stacked. For example, the substrate 11 includes an inorganic layer, an organic layer and an inorganic layer stacked in sequence. At this time, the multilayer structure in which the organic layer and the inorganic layer are alternately stacked can take into account the flexibility and strength of the substrate 11, so that the display panel 10 has a bendable function and can resist fracture and deformation; when the substrate 11 is a rigid substrate, its material may be glass or metal. The present application does not limit the structure of the substrate 11.

[0116] The driving circuit layer 12 includes a pixel driving circuit, and the pixel driving circuit includes a transistor and a storage capacitor. Figure 2 The transistor includes a semiconductor portion, a gate, a source and a drain. The capacitor includes a first plate and a second plate. The gate and the first plate may be located in a first conductive layer (e.g., a metal layer), the second plate may be located in a second conductive layer (e.g., a metal layer), and the source and the drain may be located in a third conductive layer (e.g., a metal layer).

[0117] An interlayer insulating layer is provided between the first conductive layer and the second conductive layer, and between the second conductive layer and the third conductive layer. At the same time, the driving circuit layer 12 may also include a fourth conductive layer (for example, a metal layer), which is located on the side of the third conductive layer away from the substrate 11, and the fourth conductive layer is provided with a signal line, which electrically connects the pixel driving circuit and the light-emitting unit 3. A first planarization layer (PLN1) is provided between the fourth conductive layer and the third conductive layer, and a second planarization layer (PLN2) may be provided on the surface of the side of the fourth conductive layer away from the substrate 11. The pixel definition layer 2 and the first electrode 31 of the light-emitting unit 3 are specifically provided on the surface of the second planarization layer (PLN2).

[0118] The pixel driving circuit may be, for example, a 2T1C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit, and the present application does not limit its specific structure. The "2T1C circuit" refers to a pixel circuit including two thin film transistors (T) and one capacitor (C) in the pixel circuit, and the other "7T1C circuit", "7T2C circuit", "9T1C circuit", etc. are analogous.

[0119] The third conductive layer and the fourth conductive layer may include a signal line for transmitting a signal to the pixel driving circuit; for example, a first voltage signal (ELVSS), a second voltage signal (ELVDD) or a data signal (DATA) may be transmitted. In this embodiment, the third conductive layer and the fourth conductive layer may include a signal line for transmitting the first voltage signal ELVSS.

[0120] In one implementation, a buffer layer may be further disposed between the substrate 11 and the driving circuit layer 12 .

[0121] The pixel definition layer 2 may be formed of an organic material such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin or phenolic resin, or an inorganic material such as SiNx. In one embodiment, the material of the pixel definition layer 2 includes a light absorbing material, which can prevent the light emitted by two adjacent light emitting units 3 from crosstalk.

[0122] Combination Figure 2 The pixel definition layer 2 is disposed on the substrate 1, for example, the pixel definition layer 2 is disposed on the surface of the second planarization layer (PLN2) of the substrate 1, and is located on the side of the driving circuit layer 12 away from the substrate 11. The pixel definition layer 2 includes a pixel definition portion 20, and the pixel definition portion 20 encloses a pixel opening 21.

[0123] Combination Figures 2 to 4 , Figure 3 A top view of a pixel opening on a pixel definition layer provided in an embodiment of the present application; Figure 4 for Figure 3The side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first wall portion 22 and a second wall portion 23. The first wall portion 22 and the second wall portion 23 corresponding to the same pixel opening 21 are arranged along the circumference of the pixel opening 21.

[0124] In one embodiment, the first angle α between the first wall portion 22 and the side of the pixel defining portion 20 close to the substrate 1 is greater than the second angle β between the second wall portion 23 and the pixel defining portion 20 close to the substrate 1. The side of the pixel defining portion 20 close to the substrate 1 refers to the side surface of the pixel defining portion 20 close to the substrate 1. That is, the first angle α between at least a portion of the tangent or section of the first wall portion 22 and the side of the pixel defining portion 20 close to the substrate 1 is greater than the second angle β between at least a portion of the tangent or section of the second wall portion 23 and the side of the pixel defining portion close to the substrate 1. For example, in a cross section of the isolation structure 4 passing through the central axis of the isolation opening 40 and perpendicular to the substrate 1, the first angle α between the line connecting the side of the first wall portion 22 away from the substrate 1 and the side of the first wall portion 22 close to the substrate 1, and the side of the pixel defining portion 20 close to the substrate 1, is greater than the second angle β between the line connecting the side of the second wall portion 23 away from the substrate 1 and the side of the second wall portion 23 close to the substrate 1, and the pixel defining portion 20 close to the substrate 1.

[0125] In this embodiment, a first distance between a side of the first wall portion 22 away from the substrate 1 and a side of the pixel definition portion 20 close to the substrate 1 (i.e., the height of the first wall portion 22 along the thickness direction of the substrate, i.e., the maximum thickness of the pixel definition portion 20 at the first wall portion 22) may be equal to, less than or greater than a second distance between a side of the second wall portion 23 away from the substrate 1 and a side of the pixel definition portion 20 close to the substrate 1 (i.e., the height of the second wall portion 23 along the thickness direction of the substrate, i.e., the maximum thickness of the pixel definition portion 20 at the second wall portion 23), and the present application does not impose any limitation on this.

[0126] In another embodiment, in combination Figure 4 , a distance S3 between a side of the first wall portion 22 away from the substrate 1 and a side of the first wall portion 22 close to the substrate 1 on the orthographic projection of the substrate 1 is smaller than a distance S4 between a side of the second wall portion 23 away from the substrate 1 and a side of the second wall portion 23 close to the substrate 1 on the orthographic projection of the substrate 1. For example, a first distance between a side of the first wall portion 22 away from the substrate 1 and a side of the pixel definition portion 20 close to the substrate 1 may be equal to a second distance between a side of the second wall portion 23 away from the substrate 1 and a side of the pixel definition portion 20 close to the substrate 1.

[0127] By making the distance between the side of the first wall away from the substrate and the side of the first wall close to the substrate on the substrate smaller than the distance between the side of the second wall away from the substrate and the side of the second wall close to the substrate on the substrate. In this way, the inclination of the first wall 22 can be made greater than the inclination of the second wall 23; in the process of preparing the display panel 10, the inclination angles of the first wall 22 and the second wall 23 are designed according to actual needs, and the inclination angle of the first wall 22 can be increased to expose more first electrodes 31 and increase the area of ​​the pixel opening 21; at the same time, by reasonably setting the inclination angle of the second wall 23, the second electrode 33 is not easy to break when extending from the second wall 23 to the pixel definition layer 2, and the continuity of the film layer is maintained, so that the first side of the formed second electrode 33 is continuous and extends through the second wall 23 to the side surface of the pixel definition layer 2 away from the substrate 1, so as to realize the effective electrical connection of the second electrode 33 with other devices; thereby, while ensuring the normal electrical connection of the second electrode 33, the light-emitting area of ​​the display panel 10 is increased, and the light-emitting efficiency is improved.

[0128] Among them, on the cross section of the isolation structure 4 passing through the central axis of the isolation opening 40 and perpendicular to the substrate 1, along the circumferential direction of the pixel opening 21, each position of the first wall portion 22 and / or each position of the second wall portion 23 can be straight, curved or folded (for example, stepped). That is to say, along the stacking direction Y of the display panel 10, the first wall portion 22 and / or the second wall portion 23 are planes, curved or bent. It should be noted that if the vertical cross section of the first wall portion 22 and / or the second wall portion 23 is curved or folded, the first angle α refers to the angle between the tangent or section of the first wall portion 22 at each position along the circumferential direction of the pixel opening 21 and the side of the pixel definition portion 20 close to the substrate 1; the second angle β refers to the angle between the tangent or section of the second wall portion 23 at each position along the circumferential direction of the pixel opening 21 and the side of the pixel definition portion 20 close to the substrate 1.

[0129] Combination Figure 2, the light-emitting unit 3 is arranged on the substrate 1, for example, the light-emitting unit 3 is arranged on the surface of the second planarization layer (PLN) of the substrate 1, and is located on the side of the driving circuit layer 12 away from the substrate 11. At least part of the light-emitting unit 3 is located in the pixel opening 21. Among them, the light-emitting unit 3 includes a first electrode 31, a light-emitting functional layer 32 and a second electrode 33 which are sequentially stacked along a direction Y away from the substrate 1. The pixel definition layer 2 covers the gap between adjacent first electrodes 31 and the edge of the first electrode 31, so that the pixel opening 21 exposes at least part of the first electrode 31. The light-emitting functional layer 32 can be located between the first electrode 31 and the second electrode 33. The first side of the light-emitting functional layer 32 extends continuously from the second wall portion 23 to the side surface of the pixel definition portion 20 away from the substrate 1. For example, the light-emitting functional layer 32 has a first side and a second side opposite to each other along the aperture direction of the pixel opening 21.

[0130] The first side of the second electrode 33 extends through the second wall portion 23 to a surface of the pixel defining portion 20 that is away from the substrate 1 .

[0131] The first electrode 31 may be an anode, and the second electrode 33 may be a cathode. The material of the first electrode 31 and / or the second electrode 33 generally includes indium tin oxide and / or aluminum.

[0132] As described above, by making the first angle α between the first wall portion 22 of the pixel opening 21 and the side of the pixel definition portion 20 close to the substrate 1 greater than the second angle β between the second wall portion 23 and the side of the pixel definition portion 20 close to the substrate 1; and the first side of the second electrode 33 extends through the second wall portion 23 to the side surface of the pixel definition layer 2 away from the substrate 1; in this way, in the process of preparing the display panel 10, the size of the first angle α and the second angle β can be designed according to actual needs, so that by reasonably setting the second angle β, the second electrode 33 is not easy to break when extending from the second wall portion 23 to the pixel definition layer 2, and the continuity of the film layer is maintained, so that the first side of the formed second electrode 33 is continuous and extends through the second wall portion 23 to the side surface of the pixel definition layer 2 away from the substrate 1, so as to achieve effective electrical connection between the second electrode 33 and other devices. At the same time, by increasing the first angle α, more first electrodes 31 can be exposed, and the area of ​​the pixel opening 21 can be increased, so as to effectively increase the light-emitting area of ​​the display panel 10 while ensuring the normal electrical connection of the second electrode 33, and improve the light-emitting efficiency.

[0133] The number of the light emitting units 3 may be one, two, three or more. When the number of the light emitting units 3 is multiple, the multiple light emitting units 3 include a blue light emitting unit, a red light emitting unit and a green light emitting unit; wherein the light emitting color of the blue light emitting unit is blue, the light emitting color of the red light emitting unit is red, and the light emitting color of the green light emitting unit is green. It should be noted that the color of the light emitted by the light emitting unit 3 may not be limited to red, green, and blue, but may also be yellow or other colors, which are not limited here.

[0134] In some embodiments, the ratio of the sum of the areas of the orthogonal projections of the light-emitting areas (corresponding to the pixel openings 21) of all blue light-emitting units on the substrate 1 to the area of ​​the display area of ​​the display panel 10 is greater than or equal to 10%, and less than or equal to 20%; for example, 10%, 13%, 15%, 17% or 20%. The ratio of the sum of the areas of the orthogonal projections of the light-emitting areas (corresponding to the pixel openings 21) of all red light-emitting units 3 on the substrate 1 to the area of ​​the display area of ​​the display panel 10 is greater than or equal to 5%, and less than or equal to 15%; for example, 5%, 8%, 10%, 13% or 15%. The ratio of the sum of the areas of the orthogonal projections of the light-emitting areas (corresponding to the pixel openings 21) of all green light-emitting units 3 on the substrate 1 to the area of ​​the display area of ​​the display panel 10 is greater than or equal to 3%, and less than or equal to 12%; for example, 3%, 5%, 7%, 10% or 12%. In this way, it can be ensured that the display panel 10 has a larger light-emitting area, and the light-emitting efficiency of the display panel 10 is improved.

[0135] In one embodiment, in combination Figure 4 , along the direction X1 away from the pixel opening 21, the distance S1 between the first wall portion 22 and the side of the pixel definition portion 20 close to the substrate 1 along the thickness direction Y of the substrate 1 gradually increases, that is, along the direction X1 away from the pixel opening 21, the thickness of the pixel definition portion 20 corresponding to the first wall portion 22 along the thickness direction Y of the substrate 1 gradually increases. Or, as follows Figure 6 As shown, the first wall portion 22 is perpendicular to a side of the pixel defining portion 20 away from the substrate 1 .

[0136] In this embodiment, along the direction X2 away from the pixel opening 21, the distance S2 between the second wall portion 23 and the side of the pixel definition portion 20 close to the substrate 1 along the thickness direction of the substrate 1 gradually increases, that is, along the direction X2 away from the pixel opening 21, the thickness of the pixel definition portion 20 corresponding to the second wall portion 23 along the thickness direction Y of the substrate 1 gradually increases.

[0137] In one embodiment, the first angle α is greater than or equal to 60° and less than or equal to 90°; for example, the second angle β is less than 60°.

[0138] In some embodiments, see Figure 1, the first angle α is greater than or equal to 60° and less than 90°. The second angle β is less than 60°. Among them, since the angle of the first angle α is relatively large, the positive projection of the first wall portion 22 on the substrate 1 is relatively short, so that the opening area of ​​the pixel opening 21 can be effectively increased, thereby exposing more of the first electrode 31, thereby forming a light-emitting area of ​​the light-emitting unit 3 with a larger area in the pixel opening 21, so as to improve the light-emitting efficiency of the display panel 10. At the same time, since the angle of the second angle β is relatively small, in this way, in the process of forming the second electrode 33, it can be ensured that the second electrode 33 can be continuously extended through the second wall portion 23 to ensure the effective electrical connection between the second electrode 33 and other devices.

[0139] In a specific embodiment, the first angle α is greater than or equal to 75° and less than 90°; for example, the first angle α may be 75°, 78°, 80°, 83° or 85°, etc. The second angle β may be 45°, 48° or 50°, etc.

[0140] In this embodiment, combined with Figure 1 , due to the large slope of the first wall portion 22, the second side of the second electrode 33 opposite to the first side is disconnected at the first wall portion 22; that is, the second side of the second electrode 33, the part located on the side of the pixel definition portion 20 away from the substrate 1 is discontinuous with the part located in the pixel opening 21. The second side of the light-emitting functional layer 32 opposite to the first side is disconnected at the first wall portion 22; that is, the second side of the light-emitting functional layer 32, the part located on the side of the pixel definition portion 20 away from the substrate 1 is discontinuous with the part located in the pixel opening 21. As for the second wall portion 23, due to its relatively small slope, the first side of the second electrode 33 extends continuously to the surface of the side of the pixel definition portion 20 away from the substrate 1, so as to ensure the effective electrical connection between the second electrode 33 and the isolation structure 4.

[0141] The second side of the light-emitting functional layer 32 opposite to the first side is disconnected at the first wall portion 22; that is, the second side of the light-emitting functional layer 32, the portion located on the side of the pixel definition portion 20 away from the substrate 1 is discontinuous with the portion located in the pixel opening 21. The edge of the second electrode 33 close to the first wall portion 22 overlaps with the portion of the side wall of the isolation structure 4 facing the isolation opening close to the first wall portion 22.

[0142] Combination Figure 1 It can be understood that in this embodiment, one side of the second electrode 33 continuously extends to the side of the pixel definition portion 20 away from the substrate 1. Compared with the solution in which both sides of the second electrode 33 continuously extend to the side of the pixel definition layer portion 20 away from the substrate 1, in the process of evaporating the second electrode 33, the number of evaporation times is reduced from two to one, which reduces the thickness H1 of the portion of the second electrode 33 in the pixel opening 21, improves the viewing angle and / or light extraction efficiency of the display panel 10, and thus improves product performance.

[0143] The thickness H1 of the portion of the second electrode 33 in the pixel opening 21 may be greater than or equal to 80 angstroms and less than or equal to 170 angstroms; for example, H1 may be 80 angstroms, 100 angstroms, 120 angstroms, 150 angstroms or 170 angstroms, etc.

[0144] In some embodiments, along the circumferential direction of the pixel opening 21, the first ratio of the length of the first wall portion 22 to the circumference of the pixel opening 21 is greater than or equal to 25% and less than or equal to 80%; for example, the first ratio may be 25%, 40%, 50%, 60%, 70%, 75% or 80%, etc. Thus, the pixel opening 21 exposes a larger area of ​​the first electrode 31, effectively increasing the area of ​​the pixel opening 21, thereby increasing the light-emitting area and improving the light-emitting efficiency.

[0145] In this embodiment, along the circumferential direction of the pixel opening 21, the second ratio of the length of the second wall portion 23 to the circumference of the pixel opening 21 is greater than or equal to 10% and less than or equal to 25%; for example, the second ratio may be 10%, 15%, 20% or 25%, etc. Among them, the circumference of the pixel opening 21 corresponding to the first ratio and the second ratio is the same circumference. The circumference of the pixel opening 21 refers to the length of the pixel opening 21 along its circumferential direction. The circumference may be the circumference of the end of the pixel opening 21 close to the substrate 1, or the circumference of the end of the pixel opening 21 away from the substrate, or the circumference corresponding to any other position of the pixel opening 21 along the stacking direction Y of the display panel 10.

[0146] In one embodiment, see Figure 3 The side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first side wall b1, a second side wall b2, a third side wall b3 and a fourth side wall b4 arranged in sequence (e.g., connected end to end) along the circumferential direction of the pixel opening 21. The first wall portion 22 includes one or more of the first side wall b1, the second side wall b2 and the fourth side wall b4. The second wall portion 23 includes the third side wall b3.

[0147] That is, the angle between one or more of the first side wall b1, the second side wall b2, and the fourth side wall b4 and the side of the pixel definition portion 20 facing the substrate 1 is greater than or equal to 60° and less than or equal to 90°; the angle between the third side wall b3 and the side of the pixel definition portion 20 facing the substrate 1 is less than 60°. It can be understood that when the angle between the side wall of the pixel opening 21 and the side of the pixel definition portion 20 facing the substrate 1 is greater than or equal to 60° and less than or equal to 90°, the second electrode 33 is disconnected at these side walls.

[0148] In a specific embodiment, the angle between the first side wall b1 and the side of the pixel definition portion 20 facing the substrate 1, the angle between the second side wall b2 and the side of the pixel definition portion 20 facing the substrate 1, and the angle between the fourth side wall b4 and the side of the pixel definition portion 20 facing the substrate 1 are all greater than or equal to 60° and less than or equal to 90°. In this way, the area of ​​the pixel opening 21 can be increased as much as possible.

[0149] In a specific embodiment, the pixel definition layer 2 is provided with a plurality of pixel openings 21. In one embodiment, the first angles α corresponding to different pixel openings 21 (for example, pixel openings 21 corresponding to light-emitting units 3 of different luminous colors, or pixel openings 21 corresponding to light-emitting units 3 of the same luminous color) are the same; and / or, the second angles β corresponding to different pixel openings 21 are the same. For ease of understanding, the following description is made by taking the example that the pixel openings 21 include two or three. For example, the first angle α corresponding to the first pixel opening is the same as the first angle α corresponding to the second pixel opening. The second angle β corresponding to the first pixel opening is also the same as the second angle β corresponding to the second pixel opening. The first pixel opening and the second pixel opening may correspond to light-emitting units 3 of different luminous colors, or correspond to light-emitting units 3 of the same luminous color.

[0150] Alternatively, the first angles α corresponding to different pixel openings 21 are different; and / or the second angles β corresponding to different pixel openings 21 are different. For example, the first angle α corresponding to the first pixel opening is different from the first angle α corresponding to the second pixel opening. The second angle β corresponding to the first pixel opening is also different from the second angle β corresponding to the second pixel opening.

[0151] Alternatively, the first angles α corresponding to different pixel openings 21 are the same, and the second angles β corresponding to different pixel openings 21 are different.

[0152] Alternatively, the first angles α corresponding to different pixel openings 21 are different, and the second angles β corresponding to different pixel openings 21 are the same. For example, the first angle α corresponding to the first pixel opening is the same as the first angle α corresponding to the second pixel opening. The second angle β corresponding to the first pixel opening is different from the second angle β corresponding to the second pixel opening.

[0153] Alternatively, among the multiple pixel openings 21, the first angle α corresponding to some different pixel openings 21 is the same, and the corresponding second angle β is the same, and the first angle α corresponding to some different pixel openings 21 is the same, and the corresponding second angle β is different. For example, the first angle α corresponding to the first pixel opening is the same as the first angle α corresponding to the second pixel opening; the second angle β corresponding to the first pixel opening is also the same as the second angle β corresponding to the second pixel opening. The first angle α corresponding to the first pixel opening is different from the first angle α corresponding to the third pixel opening. The second angle β corresponding to the first pixel opening is also different from the second angle β corresponding to the third pixel opening. The first pixel opening, the second pixel opening, and the third pixel opening may correspond to light-emitting units 3 with different luminous colors, or may correspond to light-emitting units 3 with the same luminous color.

[0154] In another embodiment, see Figure 5 and Figure 6 , Figure 5 A schematic cross-sectional structure diagram of a display panel 10 provided in another embodiment of the present application; Figure 6 for Figure 5 The cross-sectional structure diagram of the pixel opening defined by the pixel definition layer 2 is shown. Figures 1 to 4 The difference between the corresponding embodiment is that the first angle α is equal to 90°, that is, the first wall portion 22 is perpendicular to the substrate 1. It can be understood that in this embodiment, there is no slope at the position of the pixel definition layer 2 corresponding to the first wall portion 22; compared with the solution in which the first wall portion 22 is inclined, the first wall portion 22 can expose more first electrodes 31 to define a larger pixel opening 21, thereby increasing the light-emitting area and effectively improving the light-emitting efficiency of the display panel 10.

[0155] In this embodiment, combined with Figure 5 , the second side of the second electrode 33 is disconnected at the first wall portion 22; the first side of the second electrode 33 is continuously extended to the surface of the pixel definition layer 2 facing away from the substrate 1 to ensure effective electrical connection between the second electrode 33 and external devices. The second side of the light-emitting functional layer 32 is disconnected at the first wall portion 22; the first side of the light-emitting functional layer 32 is continuously extended to the surface of the pixel definition layer 2 (for example, the pixel definition portion 20) facing away from the substrate 1.

[0156] In this embodiment, the angle between one or more of the first side wall b1, the second side wall b2, and the fourth side wall b4 and the side of the pixel definition part 20 close to the substrate 1 is equal to 90°; the angle between the third side wall b3 and the side of the pixel definition part 20 close to the substrate 1 is less than 60°. It can be understood that in this embodiment, when the angle between one or more of the first side wall b1, the second side wall b2, and the fourth side wall b4 and the side of the pixel definition part 20 close to the substrate 1 is equal to 90°, the second electrode 33 and the light-emitting functional layer 32 are disconnected on these side walls.

[0157] In a specific embodiment, the angle between the first side wall b1 and the side of the pixel definition portion 20 close to the substrate 1, the angle between the second side wall b2 and the side of the pixel definition portion 20 close to the substrate 1, and the angle between the fourth side wall b4 and the side of the pixel definition portion 20 close to the substrate 1 can all be equal to 90°.

[0158] Of course, in other embodiments, the angle between one or more of the first side wall b1, the second side wall b2, and the fourth side wall b4 and the side of the pixel definition part 20 close to the substrate 1 may be greater than or equal to 60° and less than 90°, and the angle between one or more of the first side wall b1, the second side wall b2, and the fourth side wall b4 and the side of the pixel definition part 20 close to the substrate 1 may be equal to 90°. For example, the angle between the first side wall b1 and the side of the pixel definition part 20 close to the substrate 1 may be greater than or equal to 60° and less than 90°; the angle between the second side wall b2 and the fourth side wall b4 and the side of the pixel definition part 20 close to the substrate 1 may be equal to 90°.

[0159] In the embodiment of the present application, the thickness H2 of the pixel definition layer 2 may be greater than or equal to 3000 angstroms and less than or equal to 10000 angstroms; for example, 3000 angstroms, 5000 angstroms, 7000 angstroms, 9000 angstroms or 10000 angstroms, etc. In this way, the pixel definition layer 2 can be ensured to have a certain thickness to reduce the risk of the pixel definition layer 2 being overetched during the formation of the pixel opening 21 due to its small thickness; at the same time, the structure of the pixel definition layer 2 provided in the above embodiment can still realize the effective electrical connection between the second electrode 33 and the isolation structure mentioned later. The pixel definition layer 2 may include an inorganic insulating layer.

[0160] In a specific embodiment, in combination Figure 1, the display panel further includes an isolation structure 4. For example, the isolation structure 4 is disposed on a side of the pixel definition layer 2 (e.g., the pixel definition portion 20) facing away from the substrate 1, or the pixel definition layer 2 is provided with a clearance opening, and the isolation structure 4 is located at the clearance opening. The isolation structure 4 encloses a plurality of isolation openings, and the isolation openings 40 are connected to the corresponding pixel openings 21, for example, one isolation opening 40 is connected to one corresponding pixel opening 21. At least part of the light-emitting unit 3 is located in the corresponding isolation opening 40, and the orthographic projection of the isolation structure 4 on the substrate 1 is located within the gap and notch of the orthographic projection of the light-emitting unit 3 on the substrate 1, that is, the position of the isolation opening 40 is the position of the light-emitting unit 3. By enclosing a plurality of isolation openings 40, the isolation structure 4 can be in a grid shape. During the preparation of the light-emitting unit 3, the film layers in all the light-emitting units 3 can be vapor-deposited on the entire surface. At the edge of the isolation structure 4, due to the presence of the step difference, the film layers of these light-emitting units 3 will be disconnected, so that the formed light-emitting units 3 are completely located in the isolation openings. In this way, the preparation of the light-emitting unit 3 does not require the mask plate to be aligned, that is, there is no problem of alignment accuracy, so the position of the light-emitting unit 3 can be accurately located.

[0161] The isolation structure 4 includes a conductive material, and the conductive material includes aluminum, titanium and / or molybdenum.

[0162] In some embodiments, the first side of the second electrode 33 extends continuously from the second wall portion 23 to the surface of the side of the pixel definition portion 20 facing away from the substrate 1, and the first side of the second electrode 33 overlaps the side wall of the isolation structure 4 facing the isolation opening 40, so as to be in contact and electrically connected with the isolation structure 4. The second side of the second electrode 33 close to the first wall portion 22 is disconnected at the first wall portion 22, and the edge of the second electrode 33 close to the first wall portion 22 overlaps the side wall of the isolation structure 4 facing the isolation opening 40 close to the first wall portion 22 (i.e., the third wall portion of the isolation structure 4).

[0163] Among them, combined Figure 1 , the pixel opening 21 has a first side and a second side opposite to each other along the thickness direction (or stacking direction) Y of the display panel 10. The first side of the pixel opening 21 is away from the substrate 1, and the second side of the pixel opening 21 is close to the substrate 1. In some embodiments, the orthographic projection of the side wall of the isolation structure 4 close to the isolation opening 40 (e.g., the inner wall surface of the isolation structure 4) on the substrate 1 is located outside the orthographic projection of the side (e.g., the second side) of the pixel opening 21 close to the substrate 1 on the substrate 1. For example, the orthographic projection of the side wall of the isolation structure 4 close to the isolation opening 40 (e.g., the inner wall surface of the isolation structure 4) on the substrate 1 is located outside the orthographic projection of the side (e.g., the first side) of the pixel opening 21 away from the substrate 1 on the substrate 1.

[0164] The side wall of the isolation structure 4 facing the isolation opening 40 includes a third wall portion close to the first wall portion 22 and a fourth wall portion close to the second wall portion 23. The first wall portion 22, the second wall portion 23, the third wall portion and the fourth wall portion respectively have a first side away from the substrate 1 and a second side close to the substrate 1 along the thickness direction (or stacking direction) Y of the display panel 10. The third wall portion and the fourth wall portion may be arranged along the circumferential direction of the isolation structure 4.

[0165] In one embodiment, in combination Figure 2 or Figure 5 , along the stacking direction Y of the display panel 10, the orthographic projection of the side of the third wall portion away from the substrate 1 (for example, the first side) on the substrate 1 is the first orthographic projection, and the orthographic projection of the side of the first wall portion 22 away from the substrate 1 (for example, the first side) on the substrate 1 is the second orthographic projection, and the first orthographic projection and the second orthographic projection extend along the circumferential direction of the pixel opening 21 and at least partially overlap. That is, the first orthographic projection and the second orthographic projection at least partially overlap, and extend in the same direction.

[0166] In one embodiment, Figures 7 to 9 The cross-sectional structure diagram of the display panel provided in different embodiments of the present application. Figure 7 , along the stacking direction Y of the display panel 10, the orthographic projection of the first wall portion 22 close to the substrate 1 on the substrate 1 is the third orthographic projection. The first orthographic projection is located between the second orthographic projection and the third orthographic projection.

[0167] In one embodiment, in combination Figure 8 The first orthographic projection is spaced apart from the orthographic projection of the first wall portion 22 on the substrate 1 , and the first orthographic projection is located on a side of the second orthographic projection away from the third orthographic projection.

[0168] In one embodiment, in combination Figure 8 , the orthographic projection of the first side of the second wall portion 23 away from the substrate 1 on the substrate 1 is the fourth orthographic projection; the orthographic projection of the second side of the second wall portion 23 close to the substrate 1 on the substrate 1 is the fifth orthographic projection. The orthographic projection of the fourth wall portion on the substrate 1 is spaced apart from the orthographic projection of the second wall portion 23 on the substrate 1, and the orthographic projection of the fourth wall portion on the substrate 1 is located on the side of the fourth orthographic projection away from the fifth orthographic projection.

[0169] In some embodiments, in combination Figure 8 , the distance between the orthographic projection of the fourth wall portion on the substrate 1 and the orthographic projection of the first side of the second wall portion 23 away from the substrate 1 on the substrate 1 is the third spacing distance L3; the distance between the orthographic projection of the third wall portion on the substrate 1 and the orthographic projection of the first side of the first wall portion 22 away from the substrate 1 on the substrate 1 is the fourth spacing distance L4. The third spacing distance L3 is greater than the fourth spacing distance L4.

[0170] In some embodiments, in combination Figure 8 , the distance between the orthographic projection of the fourth wall portion on the substrate 1 and the orthographic projection of the second side of the second wall portion 23 close to the substrate 1 on the substrate 1 is the fifth spacing distance L5; the distance between the orthographic projection of the third wall portion on the substrate 1 and the orthographic projection of the second side of the first wall portion 22 close to the substrate 1 on the substrate 1 is the sixth spacing distance L6. Among them, the fifth spacing distance L5 is greater than the sixth spacing distance L6.

[0171] In some embodiments, the Figure 1 , the isolation structure 4 includes a first isolation portion 41 and a second isolation portion 42. The second isolation portion 42 is arranged on a side surface of the first isolation portion 41 away from the substrate 1; and the orthographic projection of the side of the first isolation portion 41 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation portion 42 on the substrate 1, that is, the isolation structure 4 is wide at the top and narrow at the bottom, so that the isolation effect of the isolation structure 4 on the light-emitting unit 3 can be increased. Among them, the vertical cross-section of the first isolation portion 41 can be a trapezoidal structure to increase the supporting strength; the second isolation portion 42 can be called a crown. The orthographic projection area of ​​the side of the first isolation portion 41 away from the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the second isolation portion 42 on the substrate 1. The cross-section of the isolation structure 4 perpendicular to the substrate can be T-shaped.

[0172] The second isolation portion 42 includes a conductive material, and the conductive material includes a metal, such as titanium.

[0173] In one embodiment, in combination Figure 2 , in order to increase the adhesion between the isolation structure 4 and the pixel definition layer 2 and improve the bonding strength between the two; the isolation structure 4 also includes a third isolation part 43, which is arranged between the first isolation part 41 and the substrate 1, and the third isolation part 43 has good adhesion to the first isolation part 41 and the pixel definition layer 2. Among them, the first isolation part 41, the second isolation part 42 and the third isolation part 43 are all conductive materials, such as conductive metals such as copper and aluminum. Among them, the material of the first isolation part 41 can be specifically aluminum; the material of the second isolation part 42 can be specifically titanium (Ti); and the third isolation part 43 can be specifically a molybdenum (Mo) layer. For example, the orthographic projection of the first isolation part 41 on the substrate 1 is located within the orthographic projection of the third isolation part 43 on the substrate 1. For example, the orthographic projection area of ​​the side of the first isolation part 41 away from the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the third isolation part 43 on the substrate 1. The cross section of the isolation structure 4 perpendicular to the substrate can be an I-shaped.

[0174] In a specific embodiment, the first side of the second electrode 33 is in contact with and electrically connected to the third isolation portion 43 , or the first side of the second electrode 33 is in contact with and electrically connected to both the third isolation portion 43 and the first isolation portion 41 .

[0175] In one embodiment, see Figure 8Along the circumferential direction of the second isolation portion 42 , the side wall of the second isolation portion 42 facing the isolation opening 40 includes a fifth wall portion close to the first wall portion 22 and a sixth wall portion close to the second wall portion 23 .

[0176] The orthographic projection of the side wall of the second isolation portion 42 facing the isolation opening on the substrate 1 is located outside the orthographic projection of the side (e.g., the second side) of the pixel opening 21 close to the substrate 1 on the substrate 1. In this way, the second isolation portion 42 can expose the entire pixel opening 21, so that the formed light-emitting unit 3 covers the entire pixel opening 21, thereby increasing the light-emitting area of ​​the light-emitting unit 3 and improving the light-emitting efficiency.

[0177] In one embodiment, in combination Figure 7 , the orthographic projection of the fifth wall portion on the substrate 1 is located between the second orthographic projection and the third orthographic projection.

[0178] In one embodiment, see Figure 2 and Figure 5 , the orthographic projection of the fifth wall portion on the substrate 1 extends along the circumferential direction of the pixel opening 21 and at least partially overlaps with the second orthographic projection; that is, the orthographic projection of the fifth wall portion on the substrate 1 extends along the circumferential direction of the pixel opening 21 and at least partially overlaps with the second orthographic projection.

[0179] In one embodiment, in combination Figure 8 The orthographic projection of the fifth wall portion on the substrate 1 is spaced apart from the orthographic projection of the first wall portion on the substrate 1 , and the orthographic projection of the fifth wall portion on the substrate 1 is located on a side of the second orthographic projection away from the third orthographic projection.

[0180] In one embodiment, the orthographic projection of the sixth wall portion on the substrate 1 is spaced apart from the orthographic projection of the second wall portion on the substrate 1 , and the orthographic projection of the sixth wall portion on the substrate 1 is located on a side of the fourth orthographic projection away from the fifth orthographic projection.

[0181] In one embodiment, the distance between the orthographic projection of the sixth wall portion on the substrate 1 and the orthographic projection of the first isolation portion 41 on the substrate 1 facing the isolation opening 40 is the first spacing distance L1; the distance between the orthographic projection of the fifth wall portion on the substrate 1 and the orthographic projection of the first isolation portion 41 on the substrate 1 facing the isolation opening 40 is the second spacing distance L2; the first spacing distance L1 is equal to the second spacing distance L2.

[0182] In some embodiments, see Fig. 9 The display panel 10 further includes a plurality of encapsulation parts 50. The encapsulation parts 50 are located on a side of the corresponding light-emitting unit 3 away from the substrate 1. The encapsulation parts 50 include inorganic materials. The light-emitting units 3 with different luminous colors correspond to different encapsulation parts 50. In one embodiment, the plurality of encapsulation parts 50 are arranged at intervals. For example, one light-emitting unit 3 corresponds to one encapsulation part 50.

[0183] In some embodiments, see Fig. 9 The display panel 10 further includes a first encapsulation layer 51, which is located on a side of the plurality of encapsulation parts 50 away from the substrate 1. The first encapsulation layer 51 covers the plurality of encapsulation parts 50, the isolation structure 4, the light-emitting unit 3 and the pixel definition layer 2; and the surface of the first encapsulation layer 51 on a side away from the substrate 1 is a flat structure.

[0184] In some embodiments, see Fig. 9 The display panel 10 further includes a second encapsulation layer 52 , and the second encapsulation layer 52 is located on a side of the first encapsulation layer 51 away from the substrate 1 .

[0185] The first encapsulation layer 51 adopts organic encapsulation, and the second encapsulation layer 52 adopts inorganic encapsulation. In one embodiment, the first encapsulation layer 51 and the second encapsulation layer 52 can adopt any encapsulation material, such as inorganic encapsulation, organic encapsulation and inorganic-organic composite encapsulation, wherein the inorganic-organic composite encapsulation material has the advantages of good water and oxygen barrier properties of inorganic encapsulation materials and good film forming properties of organic encapsulation materials.

[0186] In some embodiments, the Figure 1 , a display panel 10 is provided, which includes a substrate 1, a pixel definition layer 2, a light-emitting unit 3 and an isolation structure 4.

[0187] The isolation structure 4 is disposed on the substrate 1, and the isolation structure 4 encloses an isolation opening 40, and the isolation opening 40 is connected to the corresponding pixel opening 21. The light-emitting unit 3 is disposed on the substrate 1, and at least part of the light-emitting unit 3 is located in the isolation opening 40; and the light-emitting unit 3 includes a first electrode 31, a light-emitting functional layer 32, and a second electrode 33, which are sequentially stacked in a direction away from the substrate 1.

[0188] The pixel definition layer 2 is disposed on the substrate 1, and the pixel definition layer 2 includes a pixel definition portion 20, and the pixel definition portion 20 encloses a pixel opening 21. The isolation opening 40 is connected to the corresponding pixel opening 21, and the pixel opening 21 exposes at least part of the first electrode 31. The side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first wall portion 22 and a second wall portion 23; wherein the first wall portion 22 and the second wall portion 23 corresponding to the same pixel opening 21 are arranged along the circumference of the pixel opening 21.

[0189] The first side of the second electrode 33 close to the second wall portion 23 extends continuously from the second wall portion 23 to the surface of the pixel definition portion 20 facing away from the substrate 1, and overlaps with the portion of the side wall of the isolation structure 4 close to the second wall portion 23 facing the isolation opening 40. The second side of the second electrode 33 close to the first wall portion 22 is disconnected at the first wall portion 22, and the edge of the second electrode 33 close to the first wall portion 22 overlaps with the portion of the side wall of the isolation structure 4 close to the first wall portion 22 facing the isolation opening 40.

[0190] In the above scheme, the second electrode 33 extends continuously on one side to the side of the pixel definition portion 20 away from the substrate 1, and overlaps with the side wall of the isolation structure 4 toward the isolation opening 40 close to the second wall portion 23. This not only ensures effective electrical connection between the second electrode 33 and external devices, but also compared with the scheme in which both sides of the second electrode 33 continuously extend to the side of the pixel definition portion 20 away from the substrate 1, in the process of evaporating the second electrode 33, the number of evaporation times is reduced from two to one, thereby reducing the thickness H1 of the portion of the second electrode 33 in the pixel opening 21, improving the viewing angle and / or light extraction efficiency of the display panel 10, and thus improving product performance.

[0191] In one embodiment, in combination Figure 4 , along the direction X1 away from the pixel opening 21, the distance S1 between the first wall portion 22 and the side of the pixel definition portion 20 close to the substrate 1 along the thickness direction of the substrate 1 gradually increases, that is, along the direction X1 away from the pixel opening 21, the thickness of the pixel definition portion 20 corresponding to the first wall portion 22 along the thickness direction Y of the substrate 1 gradually increases. Or, as Figure 6 The first wall portion 22 is perpendicular to a side of the pixel defining portion 20 away from the substrate 1 .

[0192] In this embodiment, along the direction X2 away from the pixel opening 21 , a distance S2 between the second wall portion 23 and a side of the pixel defining portion 20 close to the substrate 1 along the thickness direction of the substrate 1 gradually increases.

[0193] The other structures and functions of the display panel 10 provided in the above embodiment can be found in the above related description, which will not be described in detail here. This embodiment can be combined with some or all of the features in the above embodiment, which will not be described in detail here.

[0194] In one embodiment, in combination Figure 1 or Figure 5 , a display panel 10 is provided, which includes: a substrate 1, an isolation structure 4, a light-emitting unit 3 and a pixel definition layer 2.

[0195] The isolation structure 4 is disposed on the substrate 1, for example, the isolation structure 4 is disposed on the side of the pixel definition layer 2 (for example, the pixel definition portion 20) away from the substrate 1, or the pixel definition layer 2 is provided with a clearance opening, and the isolation structure 4 is located in the clearance opening. The isolation structure 4 encloses and forms an isolation opening 40, and the isolation opening 40 is connected to the corresponding pixel opening 21.

[0196] The light emitting unit 3 is disposed on the substrate 1 , and at least a portion of the light emitting unit 3 is located in the isolation opening 40 . The light emitting unit 3 includes a first electrode 31 , a light emitting functional layer 32 and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1 .

[0197] The pixel definition layer 2 is disposed on the substrate 1, and the pixel definition layer 2 includes a pixel definition portion 20, and the pixel definition portion 20 encloses a pixel opening 21. The isolation opening 40 is connected to the corresponding pixel opening 21, and the pixel opening 21 exposes at least part of the first electrode 31. In one embodiment, the side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first wall portion 22, and the second electrode 33 is disconnected at the first wall portion 22, and a first angle between the first wall portion 22 and a side of the pixel definition portion 20 close to the substrate 1 is greater than or equal to 60° and less than or equal to 90°.

[0198] In one embodiment, the first angle is greater than or equal to 60° and less than 90°. In another embodiment, the first angle is equal to 90°.

[0199] In the above scheme, since the angle of the first angle α is relatively large, the positive projection of the first wall portion 22 on the substrate 1 is relatively short, which can effectively increase the opening area of ​​the pixel opening 21, thereby exposing more of the first electrode 31, thereby forming a larger area of ​​the light-emitting unit 3 in the pixel opening 21, so as to improve the light-emitting efficiency of the display panel 10.

[0200] In some embodiments, the edge of the second electrode 33 near the first wall 22 overlaps the sidewall of the isolation structure 4 near the first wall 22 facing the isolation opening 40 . The second side of the second electrode 33 near the first wall 22 is disconnected at the first wall 22 .

[0201] In some embodiments, the side wall of the pixel definition portion 20 facing the pixel opening 21 also includes a second wall portion 23; the first side of the second electrode 33 close to the second wall portion 23 extends continuously from the second wall portion 23 to the side surface of the pixel definition portion 20 facing away from the substrate 1, and the first side of the second electrode 33 close to the second wall portion 23 overlaps with the side wall of the isolation structure 4 facing the isolation opening 40 close to the second wall portion 23; in this way, effective electrical connection between the second electrode 33 and external devices can be ensured.

[0202] The other structures and functions of the display panel 10 provided in the above embodiment can be found in the above related description, which will not be described in detail here. This embodiment can be combined with some or all of the features in the above embodiment, which will not be described in detail here.

[0203] In some embodiments, a display panel 10 is provided. The display panel 10 includes a substrate 1 , an isolation structure 4 , a light emitting unit 3 and a pixel definition layer 2 .

[0204] The isolation structure 4 is disposed on the substrate 1 . The isolation structure 4 encloses an isolation opening 40 ; the isolation opening 40 is connected to the corresponding pixel opening 21 .

[0205] The light emitting unit 3 is disposed on the substrate 1 , and at least a portion of the light emitting unit 3 is located in the isolation opening 40 . The light emitting unit 3 includes a first electrode 31 , a light emitting functional layer 32 and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1 .

[0206] The pixel definition layer 2 is disposed on the substrate 1, and the pixel definition layer 2 includes a pixel definition portion 20, and the pixel definition portion 20 encloses a pixel opening 21. The isolation opening 40 is connected to the corresponding pixel opening 21, and the pixel opening 21 exposes at least part of the first electrode 31. The side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first wall portion 22 and a second wall portion 23; wherein the first wall portion 22 and the second wall portion 23 corresponding to the same pixel opening 21 are arranged along the circumference of the pixel opening 21.

[0207] The second electrode 33 is disconnected at the first wall portion 22 , and the first side of the second electrode 33 close to the second wall portion 23 extends continuously to the side surface of the pixel definition portion 20 away from the substrate 1 , and overlaps with the side wall of the isolation structure 4 close to the second wall portion 23 facing the isolation opening 40 .

[0208] In the above scheme, the second electrode 33 extends continuously on one side to the side of the pixel definition portion 20 away from the substrate 1, and overlaps with the side wall of the isolation structure 4 toward the isolation opening 40 close to the second wall portion 23. This not only ensures effective electrical connection between the second electrode 33 and external devices, but also compared with the scheme in which both sides of the second electrode 33 continuously extend to the side of the pixel definition portion 20 away from the substrate 1, in the process of evaporating the second electrode 33, the number of evaporation times is reduced from two to one, thereby reducing the thickness H1 of the portion of the second electrode 33 in the pixel opening 21, improving the viewing angle and / or light extraction efficiency of the display panel 10, and thus improving product performance.

[0209] In this embodiment, the orthographic projection of the side wall of the isolation structure 4 close to the isolation opening 40 on the substrate 1 is located outside the orthographic projection of the side of the pixel opening 21 close to the substrate 1 on the substrate 1; the side wall of the isolation structure 4 close to the isolation opening 40 includes a third wall portion close to the first wall portion 22 and a fourth wall portion close to the second wall portion 23, and the distance L4 between the orthographic projection of the third wall portion (for example, the portion of the side wall of the second isolation portion close to the first wall portion 22 facing the isolation opening) on ​​the substrate 1 and the orthographic projection of the side of the first wall portion 22 close to the substrate 1 on the substrate 1 is smaller than the distance L3 between the orthographic projection of the fourth wall portion (for example, the portion of the side wall of the second isolation portion close to the second wall portion 23 facing the isolation opening) on ​​the substrate 1 and the orthographic projection of the side of the second wall portion 23 close to the substrate 1 on the substrate 1. That is, the fourth spacing distance L4 mentioned above is smaller than the third spacing distance L3. The third wall portion and the fourth wall portion may be arranged along the circumferential direction of the isolation structure 4.

[0210] The other structures and functions of the display panel 10 provided in this embodiment can be referred to the above related descriptions, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0211] In some embodiments, the display panel 10 includes: the display panel 10 includes: a substrate 1 , an isolation structure 4 , a light emitting unit 3 and a pixel definition layer 2 .

[0212] The isolation structure 4 is disposed on the substrate 1; the isolation structure 4 encloses an isolation opening 40. The light-emitting unit 3 is disposed on the substrate 1, and at least a portion of the light-emitting unit 3 is located in the isolation opening 40; and the light-emitting unit 3 includes a first electrode 31, a light-emitting functional layer 32, and a second electrode 33 which are sequentially stacked in a direction away from the substrate 1. The first electrode 31 can be electrically connected to the isolation structure.

[0213] The pixel definition layer 2 is disposed on the substrate 1, and the pixel definition layer 2 includes a pixel definition portion 20, and the pixel definition portion 20 encloses a pixel opening 21. The isolation opening 40 is connected to the corresponding pixel opening 21, and the pixel opening 21 exposes at least part of the first electrode 31. The side wall of the pixel definition portion 20 facing the pixel opening 21 includes a first wall portion 22 and a second wall portion 23; wherein the first wall portion 22 and the second wall portion 23 corresponding to the same pixel opening 21 are arranged along the circumference of the pixel opening 21.

[0214] A distance S3 between the orthographic projection of the first wall portion 22 away from the substrate 1 and the orthographic projection of the first wall portion 22 closer to the substrate 1 on the substrate 1 is smaller than a distance S4 between the orthographic projection of the second wall portion 23 away from the substrate 1 and the orthographic projection of the second wall portion 23 closer to the substrate 1 on the substrate 1 .

[0215] The first side of the second electrode 33 close to the second wall portion 23 extends continuously from the second wall portion 23 to the surface of the pixel definition portion 20 facing away from the substrate 1, and overlaps with the portion of the side wall of the isolation structure 4 close to the second wall portion 23 facing the isolation opening 40. The second side of the second electrode 33 close to the first wall portion is disconnected at the first wall portion. The edge of the second electrode close to the first wall portion overlaps with the portion of the side wall of the isolation structure facing the isolation opening close to the first wall portion.

[0216] The other structures and functions of the display panel 10 provided in this embodiment can be referred to the above related descriptions, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0217] In some embodiments, see Fig.10 , Fig.10 A schematic diagram of the cross-sectional structure of an electronic device provided in one embodiment of the present application. An electronic device 100 is provided, and the electronic device 100 can be a desktop computer, a laptop computer, a personal digital assistant (PDA), a mobile phone, a television, etc. The electronic device 100 includes a display panel 10 for displaying a picture during operation. Among them, the display panel 10 is the display panel 10 involved in any of the above embodiments. The specific structure and function of the display panel 10 can be found in the relevant description provided in the above embodiments. No further details will be given here.

[0218] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A pixel definition layer is disposed on the substrate, the pixel definition layer includes a pixel definition portion, and the pixel definition portion encloses a pixel opening; A light-emitting unit is disposed on the substrate, wherein at least a portion of the light-emitting unit is located at the pixel opening; and the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; Among them, the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; a first angle between the first wall portion and a side of the pixel definition portion close to the substrate is greater than a second angle between the second wall portion and a side of the pixel definition portion close to the substrate; and a first side of the second electrode extends through the second wall portion to a surface of a side of the pixel definition portion that is away from the substrate.

2. The display panel according to claim 1, characterized in that: The first angle is greater than or equal to 60° and less than or equal to 90°; Preferably, the second angle is less than 60°; Preferably, the second angle is greater than 30° and less than 60°; Preferably, the first angle is greater than 75° and less than 90°; and the second angle is greater than 30° and less than 60°; Preferably, along the direction away from the pixel opening, the distance between the first wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases; or, the first wall portion is perpendicular to the side of the pixel definition portion away from the substrate; Along the direction away from the pixel opening, the distance between the second wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases.

3. The display panel according to claim 1, characterized in that: The distance between the orthographic projection of the first wall portion away from the substrate and the orthographic projection of the first wall portion close to the substrate is smaller than the distance between the orthographic projection of the second wall portion away from the substrate and the orthographic projection of the second wall portion close to the substrate; Preferably, along the thickness direction of the substrate, a first distance between a side of the first wall portion away from the substrate and a side of the pixel definition portion close to the substrate is equal to a second distance between a side of the second wall portion away from the substrate and a side of the pixel definition portion close to the substrate.

4. The display panel according to any one of claims 1 to 3, characterized in that: The first wall portion and the second wall portion corresponding to the same pixel opening are arranged along the circumferential direction of the pixel opening; Preferably, along the circumferential direction of the pixel opening, a first ratio of the length of the first wall portion to the circumference of the pixel opening is greater than or equal to 25% and less than or equal to 80%; a second ratio of the length of the second wall portion to the circumference of the pixel opening is greater than or equal to 10% and less than or equal to 25%; Preferably, the side wall of the pixel definition portion facing the pixel opening includes a first side wall, a second side wall, a fourth side wall and a third side wall sequentially arranged along the circumferential direction of the pixel opening; the first wall portion includes at least one of the first side wall, the second side wall and the fourth side wall; the second wall portion includes the third side wall; Preferably, the angles between the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate are all greater than or equal to 60° and less than or equal to 90°; or the angles between the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate are all equal to 90°; or the angle between one or more of the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate is greater than or equal to 60° and less than 90°, and the angle between one or more of the first side wall, the second side wall and the fourth side wall and the side of the pixel definition portion close to the substrate is equal to 90°.

5. The display panel according to any one of claims 1 to 3, characterized in that: The pixel definition portion encloses a plurality of pixel openings; the light emitting unit includes a blue light emitting unit, a red light emitting unit and a green light emitting unit; Wherein, the ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all the blue light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 10% and less than or equal to 20%; The ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all the red light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 5% and less than or equal to 15%; The ratio of the sum of the areas of the orthographic projections of the light-emitting areas of all the green light-emitting units on the substrate to the area of ​​the display area of ​​the display panel is greater than or equal to 3% and less than or equal to 12%; Preferably, the thickness of the pixel definition layer is greater than or equal to 3000 angstroms and less than or equal to 10000 angstroms.

6. The display panel according to any one of claims 1 to 3, characterized in that: The second side of the second electrode opposite to the first side is disconnected at the first wall portion; the first side of the second electrode extends continuously to a surface of the pixel definition portion facing away from the substrate; Preferably, the first side of the light-emitting functional layer extends continuously at the second wall portion to a surface of the pixel definition portion facing away from the substrate; the second side of the light-emitting functional layer opposite to the first side is disconnected at the first wall portion; Preferably, a thickness of a portion of the second electrode within the pixel opening is greater than or equal to 80 angstroms and less than or equal to 170 angstroms.

7. The display panel according to any one of claims 1 to 3, characterized in that: It also includes an isolation structure, wherein the isolation structure encloses an isolation opening, and the isolation opening is connected to the corresponding pixel opening. The first side of the second electrode continuously extends from the second wall portion to a surface of the pixel definition portion facing away from the substrate, and the first side of the second electrode overlaps with a side wall of the isolation structure facing the isolation opening; Preferably, the isolation structure comprises a conductive material; Preferably, in a cross section of the isolated structure passing through the central axis of the isolation opening and perpendicular to the substrate, the first wall portion and / or the second wall portion is in a straight line, a curve or a broken line shape.

8. The display panel according to claim 7, characterized in that: The orthographic projection of the side wall of the isolation structure facing the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate; Preferably, the side wall of the isolation structure facing the isolation opening includes a third wall portion close to the first wall portion and a fourth wall portion close to the second wall portion; The orthographic projection of the side of the third wall away from the substrate on the substrate is located between the orthographic projection of the side of the first wall away from the substrate on the substrate and the orthographic projection of the side of the first wall close to the substrate on the substrate; Alternatively, an orthographic projection of a side of the third wall portion away from the substrate on the substrate and an orthographic projection of a side of the first wall portion away from the substrate on the substrate extend along the circumferential direction of the pixel opening and at least partially overlap; Alternatively, the orthographic projection of the third wall portion on the substrate is spaced apart from the orthographic projection of the first wall portion on the substrate, and the orthographic projection of the third wall portion on the substrate is located on a side of the orthographic projection of the first wall portion on the substrate away from the substrate and away from the orthographic projection of the first wall portion on the substrate close to the substrate; Preferably, the orthographic projection of the fourth wall portion on the substrate is spaced apart from the orthographic projection of the second wall portion on the substrate, and the orthographic projection of the fourth wall portion on the substrate is located on a side where the orthographic projection of the second wall portion on the substrate is away from the substrate and is away from the orthographic projection of the second wall portion on the substrate on the substrate.

9. The display panel according to claim 7, characterized in that: The isolation structure comprises: The first isolation section, A second isolation portion is provided on a surface of a side of the first isolation portion away from the substrate; and an orthographic projection of a side of the first isolation portion away from the substrate on the substrate is located within an orthographic projection of the second isolation portion on the substrate; and a first side of the second electrode extends through the second wall portion to be electrically connected to the first isolation portion; Preferably, the isolation structure further comprises a third isolation portion, wherein the third isolation portion is disposed between the first isolation portion and the substrate, and the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the third isolation portion on the substrate. Preferably, the first side of the second electrode is in contact and electrically connected with the third isolating portion, or the first side of the second electrode is in contact and electrically connected with both the third isolating portion and the first isolating portion; Preferably, the second isolation portion comprises a conductive material.

10. The display panel according to claim 9, characterized in that: The orthographic projection of the side wall of the second isolation portion facing the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate; Preferably, the orthographic projection of a portion of the side wall of the second isolation portion facing the isolation opening close to the first wall portion on the substrate is located between the orthographic projection of the first wall portion on the substrate away from the substrate and the orthographic projection of the first wall portion on the substrate close to the substrate; Alternatively, the side wall of the second isolation portion facing the isolation opening includes a fifth wall portion close to the first wall portion and a sixth wall portion close to the second wall portion; The orthographic projection of the fifth wall portion on the substrate extends along the circumferential direction of the pixel opening and at least partially overlaps with the orthographic projection of the first wall portion on the substrate away from the substrate; Alternatively, the orthographic projection of the fifth wall portion on the substrate is spaced apart from the orthographic projection of the first wall portion on the substrate, and the orthographic projection of the fifth wall portion on the substrate is located on a side where the orthographic projection of the first wall portion on the substrate away from the substrate is away from the orthographic projection of the first wall portion on the substrate close to the substrate; Preferably, the orthographic projection of the sixth wall portion on the substrate is spaced apart from the orthographic projection of the second wall portion on the substrate, and the orthographic projection of the sixth wall portion on the substrate is located on a side where the orthographic projection of the second wall portion on the substrate away from the substrate is away from the orthographic projection of the second wall portion on the substrate close to the substrate; Preferably, a first spacing distance between an orthographic projection of a side of the sixth wall portion close to the substrate on the substrate and an orthographic projection of a side of the first isolating portion facing the isolation opening on the substrate is equal to a second spacing distance between an orthographic projection of a side of the fifth wall portion close to the substrate on the substrate and an orthographic projection of a side of the first isolating portion facing the isolation opening on the substrate; Preferably, the isolation structure is located on a side of the pixel definition portion away from the substrate, or the pixel definition layer is provided with a clearance opening, and the isolation structure is located in the clearance opening.

11. The display panel according to any one of claims 1 to 3, characterized in that: The pixel definition layer is provided with a plurality of pixel openings; The first angles corresponding to different pixel openings are the same; and / or; the second angles corresponding to different pixel openings are the same; or; The first angles corresponding to different pixel openings are different; and / or; the second angles corresponding to different pixel openings are different; or; The first angles corresponding to different pixel openings are the same, and the second angles corresponding to different pixel openings are different; or The first angles corresponding to different pixel openings are different, and the second angles corresponding to different pixel openings are the same; or Among the plurality of pixel openings, some different pixel openings correspond to the same first angle and the same second angle, and some different pixel openings correspond to different first angles and the same second angle.

12. The display panel according to claim 8, characterized in that: A third spacing distance between an orthographic projection of the fourth wall portion on the substrate and an orthographic projection of a side of the second wall portion away from the substrate on the substrate is greater than a fourth spacing distance between an orthographic projection of the third wall portion on the substrate and an orthographic projection of a side of the first wall portion away from the substrate on the substrate; Preferably, the fifth spacing distance between the orthographic projection of the fourth wall portion on the substrate and the orthographic projection of the side of the second wall portion close to the substrate on the substrate is greater than the sixth spacing distance between the orthographic projection of the third wall portion on the substrate and the orthographic projection of the side of the first wall portion close to the substrate on the substrate.

13. The display panel according to claim 7, characterized in that: The display panel further comprises: a plurality of packaging parts, located at a side of the light emitting unit away from the substrate; Preferably, the light-emitting units with different light-emitting colors correspond to different packaging parts; Preferably, the plurality of packaging parts are arranged at intervals; Preferably, the display panel further comprises a first encapsulation layer, which is located on a side of the encapsulation portion away from the substrate; The display panel further comprises a second encapsulation layer located on a side of the first encapsulation layer away from the substrate; Preferably, the encapsulation portion comprises an inorganic material; the first encapsulation layer comprises an organic material, and the second encapsulation layer comprises an inorganic material.

14. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; A light emitting unit is disposed on the substrate, wherein at least a portion of the light emitting unit is located in the isolation opening; The light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate; A pixel definition layer is disposed on the substrate, the pixel definition layer includes a pixel definition portion, and the pixel definition portion encloses a pixel opening; The isolation opening is connected to the corresponding pixel opening, and the pixel opening exposes at least a portion of the first electrode; the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; the first side of the second electrode close to the second wall portion extends continuously from the second wall portion to a side surface of the pixel definition portion away from the substrate, and overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the second wall portion; The second side of the second electrode close to the first wall portion is disconnected at the first wall portion, and the edge of the second electrode close to the first wall portion overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the first wall portion.

15. The display panel according to claim 14, characterized in that: Along the direction away from the pixel opening, the distance between the first wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases; or, the first wall portion is perpendicular to the side of the pixel definition portion away from the substrate; Along the direction away from the pixel opening, the distance between the second wall portion and the side of the pixel definition portion close to the substrate along the thickness direction of the substrate gradually increases. Preferably, a distance between a side of the first wall portion away from the substrate and a side of the first wall portion close to the substrate on an orthographic projection of the substrate is smaller than a distance between a side of the second wall portion away from the substrate and a side of the second wall portion close to the substrate on an orthographic projection of the substrate; Preferably, along the thickness direction of the substrate, a first distance between a side of the first wall portion away from the substrate and a side of the pixel definition portion close to the substrate is equal to a second distance between a side of the second wall portion away from the substrate and a side of the pixel definition portion close to the substrate.

16. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; A light emitting unit is disposed on the substrate, wherein at least a portion of the light emitting unit is located in the isolation opening; The light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate; A pixel definition layer is disposed on the substrate, the pixel definition layer includes a pixel definition portion, and the pixel definition portion encloses a pixel opening; The isolation opening is connected to the corresponding pixel opening, and the pixel opening exposes at least a portion of the first electrode; the side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; the distance between the side of the first wall portion away from the substrate and the side of the first wall portion close to the substrate on the orthographic projection of the substrate is smaller than the distance between the side of the second wall portion away from the substrate and the side of the second wall portion close to the substrate on the orthographic projection of the substrate.

17. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; A light emitting unit is disposed on the substrate, wherein at least a portion of the light emitting unit is located in the isolation opening; The light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate; A pixel definition layer is disposed on the substrate, the pixel definition layer includes a pixel definition portion, and the pixel definition portion encloses a pixel opening; The isolation opening is in communication with the corresponding pixel opening, and the pixel opening exposes at least a portion of the first electrode; The side wall of the pixel definition portion toward the pixel opening includes a first wall portion, the second electrode is disconnected at the first wall portion, and a first angle between the first wall portion and a side of the pixel definition portion close to the substrate is greater than or equal to 60° and less than or equal to 90°.

18. The display panel according to claim 17, characterized in that: The edge of the second electrode close to the first wall overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the first wall; The side wall of the pixel definition portion facing the pixel opening also includes a second wall portion; the first side of the second electrode close to the second wall portion extends continuously on the second wall portion to the surface of the pixel definition portion facing away from the substrate, and the first side of the second electrode close to the second wall portion overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the second wall portion.

19. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; A light emitting unit is disposed on the substrate, wherein at least a portion of the light emitting unit is located in the isolation opening; The light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate; A pixel definition layer is disposed on the substrate, the pixel definition layer includes a pixel definition portion, and the pixel definition portion encloses a pixel opening; The isolation opening is in communication with the corresponding pixel opening, and the pixel opening exposes at least a portion of the first electrode; The side wall of the pixel definition portion facing the pixel opening includes a first wall portion and a second wall portion; the second electrode is disconnected at the first wall portion, and the first side of the second electrode close to the second wall portion extends continuously at the second wall portion to a surface of the pixel definition portion facing away from the substrate, and overlaps with a portion of the side wall of the isolation structure facing the isolation opening close to the second wall portion; The orthographic projection of the side wall of the isolation structure close to the isolation opening on the substrate is located outside the orthographic projection of the side of the pixel opening close to the substrate on the substrate; The side wall of the isolation structure close to the isolation opening includes a third wall portion close to the first wall portion and a fourth wall portion close to the second wall portion, and the distance between the orthographic projection of the third wall portion on the substrate and the orthographic projection of the first wall portion on the substrate close to the substrate is smaller than the distance between the orthographic projection of the fourth wall portion on the substrate and the orthographic projection of the second wall portion on the substrate close to the substrate.

20. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 19.

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