Display panel, display device and preparation method of display panel

Abstract

The embodiment of the invention provides a display panel, a display device and a preparation method of the display panel. The display panel at least comprises a substrate, an isolation structure and a light-emitting device, wherein the isolation structure is enclosed to form an isolation opening; the isolation structure comprises a first sub-part and a second sub-part which are located on the two opposite sides of the isolation opening in the first direction; the first direction is parallel to the substrate; the light-emitting device comprises a first electrode, a light-emitting function layer and a second electrode which are sequentially stacked in the direction away from the substrate. The second electrode is lapped with the first sub-part; the distance between the orthographic projection of the edge, close to the first sub-part, of the first electrode on the substrate and the center of the orthographic projection of the light-emitting area of the light-emitting device on the substrate is in the first direction; the distance is larger than the distance between the orthographic projection of the edge, close to the second sub-part, of the first electrode on the substrate and the center of the orthographic projection of the light-emitting area of the light-emitting device on the substrate in the first direction. According to the embodiment of the invention, the dark spot problem of the display panel is effectively reduced.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technology, and in particular, to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the process performance of current OLED display products needs to be improved. Summary of the invention

[0004] In view of this, embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel to at least partially solve the above problems.

[0005] According to a first aspect of the present application, a display panel is provided, comprising:

[0006] substrate;

[0007] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; the isolation structure includes a first sub-section and a second sub-section, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0008] A light emitting device, at least part of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0009] The second electrode overlaps the first sub-section; the second electrode is spaced apart from the second sub-section;

[0010] The distance along the first direction between the orthographic projection of the edge of the first electrode close to the first sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate is greater than the distance along the first direction between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate.

[0011] In an optional embodiment, the orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is outside the orthographic projection of the second sub-portion on the substrate;

[0012] And / or, the distance between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the distance between the orthographic projection of the edge of the second electrode close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction.

[0013] In an optional embodiment, the display panel further includes a pixel definition layer.

[0014] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode;

[0015] The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction;

[0016] Optionally, the orthographic projection of a side of the pixel opening close to the substrate on the substrate coincides with the orthographic projection of the light-emitting area on the substrate;

[0017] Optionally, a length of an overlapping portion of a side of the first electrode close to the first sub-portion and an orthographic projection of the pixel defining portion on the substrate along the first direction is greater than a length of an overlapping portion of a side of the first electrode close to the second sub-portion and an orthographic projection of the pixel defining portion on the substrate along the first direction;

[0018] Optionally, the first electrode covers a surface of a side of the pixel defining portion close to the second sub-portion away from the substrate;

[0019] Optionally, the pixel definition layer includes an inorganic insulating layer.

[0020] In an optional embodiment, the display panel further includes a pixel definition layer.

[0021] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode.

[0022] The angle between a line connecting a side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the side of the second sub-portion away from the substrate facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to an angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate;

[0023] and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and the orthographic projection of the second sub-portion on the substrate along the first direction and the orthographic projection of the second sub-portion on the substrate is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a first angle, and the first angle is equal to an angle between the side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0024] and / or, the distance between the orthographic projection of the side of the side wall of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the height of the isolation structure along the thickness direction of the substrate divided by the tangent value of the minimum evaporation angle when the second electrode is formed by the evaporation process;

[0025] and / or, when the second electrode is formed by an evaporation process, an evaporation angle is greater than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0026] And / or, an angle between a line connecting a side of a side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of a side of the second sub-portion away from the substrate toward the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to a vapor deposition angle when the second electrode is formed by a vapor deposition process; optionally, the first angle is an acute angle;

[0027] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0028] In an optional embodiment, the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate;

[0029] The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate.

[0030] In an optional embodiment, the isolation structure includes a conductive material, and the second electrode is electrically connected to the isolation structure;

[0031] and / or, the second electrodes of the plurality of light emitting devices are electrically connected via an isolation structure;

[0032] And / or, the material of the first sub-isolation structure includes titanium, and / or, the material of the second sub-isolation structure includes aluminum.

[0033] In an optional embodiment, the isolation structure further includes a third sub-isolation structure, and the third sub-isolation structure is arranged on a side of the second sub-isolation structure close to the substrate;

[0034] The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the third sub-isolation structure on the substrate;

[0035] Optionally, the orthographic projection of the third sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate;

[0036] Optionally, the material of the third sub-isolation structure includes molybdenum.

[0037] In an optional embodiment, the display panel further includes a pixel definition layer.

[0038] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode.

[0039] The angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate is less than or equal to the second angle;

[0040] and / or, the distance between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-section facing the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-section facing the isolation opening on the substrate along the first direction is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle,

[0041] and / or, the distance along the first direction between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-section facing the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-section facing the isolation opening away from the substrate on the substrate is equal to the height of the isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle,

[0042] and / or, when the second electrode is formed by an evaporation process, an evaporation angle is less than or equal to the second angle;

[0043] and / or, an angle between a line connecting a side of a side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of a side of the second sub-portion away from the substrate facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to the second angle;

[0044] And / or, the distance between the orthographic projection of the side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the height of the isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle;

[0045] and / or, the distance between the orthographic projection of the side of the side wall of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the height of the isolation structure along the thickness direction of the substrate divided by the tangent value of the maximum evaporation angle when the second electrode is formed by the evaporation process;

[0046] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0047] In an optional embodiment, the display panel further includes: a first encapsulation layer located on a side of the light emitting device facing away from the substrate;

[0048] The first encapsulation layer includes a plurality of encapsulation parts, and light-emitting devices of different luminous colors correspond to different encapsulation parts;

[0049] Optionally, the display panel further includes:

[0050] A second encapsulation layer is located on a side of the first encapsulation layer away from the substrate;

[0051] a third encapsulation layer, located on a side of the second encapsulation layer facing away from the substrate;

[0052] Optionally, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

[0053] According to a second aspect of the present application, a display panel is provided, comprising:

[0054] substrate;

[0055] An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; the isolation structure includes a first sub-section and a second sub-section, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0056] A light emitting device, at least part of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate;

[0057] The second electrode overlaps the first sub-section; the second electrode is spaced apart from the second sub-section;

[0058] The orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is outside the orthographic projection of the second sub-portion on the substrate.

[0059] According to a third aspect of the present application, a display panel is provided, comprising:

[0060] substrate;

[0061] The pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel definition portion; the pixel definition portion encloses a pixel opening,

[0062] An isolation structure is disposed on the substrate, the isolation structure encloses an isolation opening; the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the isolation structure includes a first sub-portion and a second sub-portion, which are located on opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0063] A light-emitting device, wherein at least a portion of the light-emitting device is located in the isolation opening, and the light-emitting device comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode.

[0064] The second electrode overlaps the first sub-section; the second electrode is spaced apart from the second sub-section;

[0065] The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction.

[0066] According to a fourth aspect of the present application, a display panel is provided, comprising:

[0067] substrate;

[0068] The pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel definition portion; the pixel definition portion encloses a pixel opening,

[0069] An isolation structure is disposed on the substrate, the isolation structure encloses an isolation opening; the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the isolation structure includes a first sub-portion and a second sub-portion, which are located on opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0070] A light-emitting device, wherein at least a portion of the light-emitting device is located in the isolation opening, and the light-emitting device comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode.

[0071] The second electrode overlaps the first sub-section; the second electrode is spaced apart from the second sub-section;

[0072] The length of the overlapping portion of the first electrode's side close to the first sub-portion and the pixel defining portion's orthographic projection on the substrate along the first direction is greater than the length of the overlapping portion of the first electrode's side close to the second sub-portion and the pixel defining portion's orthographic projection on the substrate along the first direction.

[0073] According to a fifth aspect of the present application, a display panel is provided, comprising:

[0074] substrate;

[0075] The pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel definition portion; the pixel definition portion encloses a pixel opening,

[0076] An isolation structure is arranged on a substrate, the isolation structure encloses an isolation opening; the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate; the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; the orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate;

[0077] A light-emitting device, wherein at least part of the light-emitting device is located in an isolation opening, and the light-emitting device comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked in a direction away from a substrate; a pixel opening exposes a part of the first electrode, a pixel defining portion is located between the first electrode and the second electrode, and the second electrode overlaps the first sub-portion; the second electrode and the second sub-portion are spaced apart; an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate is less than or equal to a second angle; a distance along the first direction between an orthographic projection of a side wall of a first sub-isolation structure of the first sub-portion toward the isolation opening on the substrate and an orthographic projection of a side wall of a second sub-isolation structure of the first sub-portion toward the isolation opening on the substrate is equal to a height of the second sub-isolation structure along the thickness direction of the substrate divided by a tangent value of the second angle.

[0078] According to a sixth aspect of the present application, a display device is provided, the display device comprising a display panel as described in any one of the first to fifth aspects.

[0079] According to a seventh aspect of the present application, a method for preparing a display panel is provided, comprising:

[0080] forming a first electrode of the light emitting device on the substrate;

[0081] An isolation structure is formed on the substrate, the isolation structure encloses an isolation opening; at least part of the light emitting device is located in the isolation opening; wherein the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0082] A light-emitting functional layer and a second electrode of the light-emitting device are formed in the isolation opening; wherein the second electrode overlaps the first sub-portion; and the second electrode is spaced apart from the second sub-portion;

[0083] The distance along the first direction between the orthographic projection of the edge of the first electrode close to the first sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate is greater than the distance along the first direction between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate.

[0084] In an optional embodiment, the orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is outside the orthographic projection of the second sub-portion on the substrate;

[0085] Optionally, the isolation opening includes a first isolation opening and a second isolation opening, the light emitting device includes a first light emitting device and a second light emitting device, and forming a light emitting functional layer and a second electrode of the light emitting device in the isolation opening includes:

[0086] forming a first light emitting material layer, a first electrode material layer, and a first packaging material layer;

[0087] Etching the first light-emitting material layer, the first electrode material layer, and the first packaging material layer of the second isolation opening, retaining the first light-emitting material layer, the first electrode material layer, and the first packaging material layer of the first isolation opening to form a light-emitting function layer and a second electrode of the first light-emitting device, and a packaging portion located on a side of the first light-emitting device away from the substrate;

[0088] forming a second light emitting material layer, a second electrode material layer, and a second encapsulation material layer;

[0089] The second light-emitting material layer, the second electrode material layer, and the second packaging material layer of the first isolation opening are etched to retain the second light-emitting material layer, the second electrode material layer, and the second packaging material layer of the second isolation opening to form a light-emitting functional layer and a second electrode of the second light-emitting device, and a packaging portion located on the side of the second light-emitting device away from the substrate.

[0090] In an optional embodiment, before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate;

[0091] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode;

[0092] The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction;

[0093] Optionally, the length of the overlapping portion of the first electrode's side close to the first sub-portion and the pixel defining portion's orthographic projection on the substrate along the first direction is greater than the length of the overlapping portion of the first electrode's side close to the second sub-portion and the pixel defining portion's orthographic projection on the substrate along the first direction.

[0094] In an optional embodiment, before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate;

[0095] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode;

[0096] The angle between a line connecting a side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the side of the second sub-portion away from the substrate facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to an angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate;

[0097] and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and the orthographic projection of the second sub-portion on the substrate along the first direction and the orthographic projection of the second sub-portion on the substrate is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a first angle, and the first angle is equal to an angle between the side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0098] and / or, when the second electrode is formed by an evaporation process, an evaporation angle is greater than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0099] Optionally, the first angle is an acute angle;

[0100] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0101] In an optional embodiment, the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate;

[0102] The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate;

[0103] Optionally, before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate;

[0104] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode;

[0105] The angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate is less than or equal to the second angle;

[0106] and / or, the distance between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-section facing the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-section facing the isolation opening on the substrate along the first direction is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle,

[0107] and / or, when the second electrode is formed by an evaporation process, an evaporation angle is less than or equal to the second angle;

[0108] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0109] According to an eighth aspect of the present application, a method for preparing a display panel is provided, comprising:

[0110] forming a first electrode of the light emitting device on the substrate;

[0111] A pixel definition layer is formed on a side of the first electrode away from the substrate; the pixel definition layer includes a pixel definition portion; the pixel definition portion encloses a pixel opening, and the pixel opening exposes a portion of the first electrode;

[0112] An isolation structure is formed on the substrate, the isolation structure encloses an isolation opening; at least part of the light-emitting device is located in the isolation opening; wherein the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, and the isolation structure includes a first sub-portion and a second sub-portion, which are located on opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate;

[0113] A light-emitting functional layer and a second electrode of the light-emitting device are formed in the isolation opening; wherein the pixel defining portion is located between the first electrode and the second electrode, and the second electrode overlaps the first sub-portion; the second electrode and the second sub-portion are arranged at intervals; the evaporation angle when the second electrode is formed by the evaporation process is greater than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate; and / or the evaporation angle when the second electrode is formed by the evaporation process is less than or equal to the second angle, and the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; the orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; the orthographic projection of the first sub-isolation structure of the first sub-portion on the substrate toward the side wall of the isolation opening is the same as the orthographic projection of the first sub-isolation structure on the substrate. The distance along the first direction of the orthographic projection of the side wall of the second sub-isolation structure of the pixel defining portion toward the isolation opening on the substrate is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle; and / or, the evaporation angle when the second electrode is formed by the evaporation process is greater than or equal to the angle between a line connecting the side of the side of the pixel defining portion close to the second sub-portion away from the substrate and the edge of the side of the second sub-portion away from the substrate toward the isolation opening, and the surface of the pixel defining portion away from the substrate; and / or, the angle between a line connecting the side of the side of the pixel defining portion close to the second sub-portion away from the substrate and the edge of the side of the second sub-portion away from the substrate toward the isolation opening, and the surface of the pixel defining portion away from the substrate is less than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate.

[0114] According to the solution provided in the embodiment of the present application, a single-sided overlap of the second electrode is adopted to ensure that the light-emitting device successfully emits light when the distance between adjacent light-emitting devices is narrow; at the same time, the lengths of the first electrode in the light-emitting device corresponding to different parts of the first sub-section and the second sub-section in the isolation structure are different. Specifically, on the overlapping side, the distance between the orthographic projection of the edge of the first electrode close to the first sub-section on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate along the first direction is greater than the distance between the orthographic projection of the edge of the first electrode close to the second sub-section on the non-overlapping side and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate along the first direction. As a result, when the second electrode is single-sidedly overlapped, the second electrodes on the overlapping side and the non-overlapping side can protect the first electrode to prevent it from being damaged by etching, thereby solving the dark spot problem caused by damage to the first electrode and reducing the risk of the first electrode being over-etched in the etching process of preparing the light-emitting functional layer and the second electrode when the first electrode on the non-overlapping side is too long and is not completely covered by the second electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0115] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0116] Figure 1 A schematic diagram of a partial cross-sectional structure of a display panel;

[0117] Figure 2 is a partial cross-sectional schematic diagram of a display panel film layer structure according to an embodiment of the present application;

[0118] Figure 2a It is a partial cross-sectional enlarged schematic diagram of a display panel film layer structure according to an embodiment of the present application;

[0119] Figure 3 is a partial cross-sectional schematic diagram of a second electrode in a display panel;

[0120] Figure 4 is a second partial cross-sectional enlarged schematic diagram of a display panel film layer structure according to an embodiment of the present application;

[0121] Figure 5 is a partial cross-sectional schematic diagram of another film layer structure of a display panel according to an embodiment of the present application;

[0122] Figure 6 is a third partial cross-sectional enlarged schematic diagram of a display panel film layer structure according to an embodiment of the present application;

[0123] Figure 7 is a fourth partial cross-sectional enlarged schematic diagram of a display panel film layer structure according to an embodiment of the present application;

[0124] Figure 8 is a top view of the relative positions of a display panel and an evaporation source according to an embodiment of the present application;

[0125] Fig. 9 is a flow chart of a method for preparing a display panel according to an embodiment of the present application;

[0126] Fig.10 A partial cross-sectional schematic diagram of a display panel film structure during a preparation process of a display panel preparation method according to an embodiment of the present application;

[0127] Fig.11 4 is a flow chart of another method for preparing a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0128] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0129] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in the embodiments of the present application refers to and includes any or all possible combinations of one or more associated listed items.

[0130] It should be understood that in the description of the embodiments of the present application, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the schemes of the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0131] In addition, when an element or layer is referred to as being “on,” “connected to,” or “coupled to” another element or layer, the element or layer may be directly on, directly connected to, or directly coupled to the other element or layer, or intervening elements or layers may be present. However, when an element or layer is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers present.

[0132] The terms first, second, etc. are used to describe various elements, components, regions, layers and / or parts, but these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer and / or part from another element, component, region, layer and / or part.

[0133] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0134] The specific implementation of the embodiment of the present application is further explained below in conjunction with the accompanying drawings of the embodiment of the present application.

[0135] The corresponding structural parts mentioned below, such as the isolation structure (or isolation column or partition structure), are described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A are further described for reference.

[0136] In the related art, in order to meet the extremely high PPI (Pixels Per Inch, pixel density unit) product design, the distance PDL (Pixel Definition Layer) Gap between each light-emitting device and the adjacent light-emitting devices of different colors becomes smaller and smaller. When the PDL Gap is less than a certain value, the cathode (second electrode) in the light-emitting device cannot overlap with the isolation structures on both sides at the same time, and in the subsequent process, the PDL not covered by the cathode (second electrode) is etched, which causes the anode (first electrode) to be damaged, thereby causing a dark spot problem.

[0137] Based on this, an embodiment of the present application provides a display panel, such as Figure 2 As shown, it includes: a substrate 10.

[0138] For example, a driving array layer may be provided on the substrate 10, and the driving array layer includes a plurality of TFTs (Thin Film Transistors), and each TFT includes an active layer, a gate insulating film, a gate electrode and other parts.

[0139] In a feasible manner, the display panel of this embodiment further includes a pixel definition layer disposed on the substrate 10, and the pixel definition layer includes a pixel definition portion 31. In a feasible manner, the pixel definition portion 31 encloses a pixel opening 32, and the pixel opening 32 is a shape that gradually increases in a direction away from the substrate 10, and is used to carry the light-emitting device. In a feasible manner, the pixel definition layer includes an inorganic insulating layer.

[0140] The display panel of this embodiment further includes an isolation structure 40, which is disposed on the substrate 10 and can isolate the multiple light-emitting devices from each other. In a feasible manner, the isolation structure 40 is disposed on the side of the pixel defining portion 31 away from the substrate 10, or the pixel definition layer is provided with a clearance opening, and the isolation structure 40 is located in the clearance opening. The isolation structure 40 encloses and forms an isolation opening 110, and the orthographic projection of the pixel opening 32 on the substrate 10 is located within the orthographic projection of the isolation opening 110 on the substrate 10. Figure 4 As shown, the isolation structure 40 includes a first sub-portion 401 and a second sub-portion 402 , which are located on two opposite sides of the isolation opening 110 along a first direction X. In a feasible manner, the first direction X is parallel to the substrate 10 .

[0141] like Figure 6 As shown, in one feasible manner, the distance L1 between the orthographic projection of the edge of the pixel defining portion 31 close to the first sub-portion 401 on the substrate 10 and the orthographic projection of the first sub-portion 401 on the substrate 10 along the first direction X is smaller than the distance L2 between the orthographic projection of the edge of the pixel defining portion 31 close to the second sub-portion 402 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X. The second electrode 20 is spaced apart from the second sub-portion 402, which is equivalent to the non-overlapping side. When the distance between the orthographic projection of the edge of the pixel defining portion 31 on the substrate 10 and the orthographic projection of the isolation structure 40 on the substrate 10 along the first direction X is too short, the pixel opening 32 will be formed as shown in the following figure. Figure 1 The shadow area shown in the figure is an area that cannot be covered by the evaporated second electrode 20, or an area that partially has a small amount of uneven second electrode 20, such as Figure 3 As shown in , there is a transition zone with uneven thickness in the second electrode 20, resulting in that part of the first electrode exposed by the pixel opening 32 is not covered by the second electrode 20, and part of the second electrode 20 located in the pixel opening 32 is uneven in thickness. The second electrode 20 is spaced apart from the second sub-portion 402, which is equivalent to the non-overlapping side. L2 is relatively long, and the second electrode 20 can be completely covered above the pixel opening 32, thereby preventing the first electrode 60 from being damaged by etching, and reducing the dark spot problem of the display panel caused by damage to the first electrode 60; at the same time, the second electrode 20 is evenly distributed above the pixel opening 32, reducing the problem of abnormal pixel light emission.

[0142] For example, the isolation structure 40 includes a first sub-isolation structure 41 and a second sub-isolation structure 42. The first sub-isolation structure 41 is disposed on a side of the second sub-isolation structure 42 away from the substrate 10, and the orthographic projection of the second sub-isolation structure 42 on the substrate 10 is inside the orthographic projection of the first sub-isolation structure 41 on the substrate 10. For example, the orthographic projection area of ​​the second sub-isolation structure 42 on the substrate 10 is smaller than the orthographic projection area of ​​the first sub-isolation structure 41 on the substrate 10. For example, the cross section of the isolation structure 40 (for example, the portion located between two adjacent isolation openings) perpendicular to the substrate may be T-shaped. In a feasible manner, the isolation structure 40 includes a conductive material, and the second electrode 20 is electrically connected to the isolation structure 40. In a feasible manner, the second electrodes 20 of a plurality of light-emitting devices are electrically connected through the isolation structure 40. For example, the second electrodes 20 of a plurality of light-emitting devices with different luminous colors are electrically connected through the isolation structure 40. In a feasible manner, the first sub-isolation structure 41 and the second sub-isolation structure 42 are implemented as metal materials. In one embodiment, the material of the first sub-isolation structure 41 includes titanium (Ti), and due to the hardness and chemical stability of titanium, at least a portion of the isolation opening 110 is shielded and protected during the preparation of the display panel. In one embodiment, the material of the second sub-isolation structure 42 includes aluminum (Al), which can carry and transmit electrical signals, and is used to transmit the electrical signals that cause the light-emitting device to emit light to the light-emitting device, and cooperate with the electrodes to make the light-emitting device emit light successfully. Figure 5 As shown, in a feasible manner, the isolation structure 40 further includes a third sub-isolation structure 43, and the third sub-isolation structure 43 is disposed on the side of the second sub-isolation structure 42 facing the substrate 10. In one embodiment, the material of the third sub-isolation structure 43 includes molybdenum (Mo), which is used to improve the stability between the second sub-isolation structure 42 and the pixel defining portion 31, and prevent the elements in the second sub-isolation structure 42 from diffusing into the pixel defining portion 31, thereby extending the service life of the display panel. In a feasible manner, the orthographic projection of the second sub-isolation structure 42 on the substrate 10 is inside the orthographic projection of the third sub-isolation structure 43 on the substrate 10. In one embodiment, the orthographic projection of the third sub-isolation structure 43 on the substrate 10 is inside the orthographic projection of the first sub-isolation structure 41 on the substrate 10. For example, the orthographic projection area of ​​the third sub-isolation structure 43 on the substrate 10 is smaller than the orthographic projection area of ​​the first sub-isolation structure 41 on the substrate 10, for example, the cross section of the isolation structure 40 (for example, the portion located between two adjacent isolation openings) perpendicular to the substrate may be an I-shaped cross section.

[0143] The display panel of this embodiment also includes a light-emitting device, which can realize the color display of the display panel. The light-emitting device is at least partially located in the isolation opening 110, and the light-emitting device includes a first electrode 60, a light-emitting functional layer 50 and a second electrode 20 which are sequentially stacked in a direction away from the substrate 10. The second electrode 20 overlaps with the first sub-portion 401, which is equivalent to the overlapping side, and the second electrode 20 is spaced from the second sub-portion 402, which is equivalent to the non-overlapping side. When the PDL Gap is small, the electrical signal is transmitted to the second electrode 20 through the isolation structure 40, thereby further realizing the light-emitting function of the light-emitting device. In a feasible manner, the second electrode 20 overlaps with the second sub-isolation structure 42 in the first sub-portion 401. In a feasible manner, the pixel opening 32 exposes part of the first electrode 60, whereby the first electrode 60 combines with the second electrode 20 to jointly make the light-emitting functional layer 50 in the light-emitting device emit light, thereby realizing the color display of the display panel. In a feasible manner, the light-emitting functional layer 50 may include an EL (Electro-Luminescence, electroluminescent material) material, which can emit blue, green or red light; for example, 50-R is a light-emitting functional layer 50 for emitting red light, 50-G is a light-emitting functional layer 50 for emitting green light, and 50-B is a light-emitting functional layer 50 for emitting blue light. In a feasible manner, the second electrode 20 is a cathode. For example, the first electrode 60 is an anode. In a feasible manner, the pixel defining portion 31 is located between the first electrode 60 and the second electrode 20.

[0144] like Figure 6, shows the light-emitting area 70 in the light-emitting device. In one embodiment, the orthographic projection of the side of the pixel opening 32 close to the substrate 10 on the substrate 10 coincides with the orthographic projection of the light-emitting area 70 on the substrate 10. The distance L3 between the orthographic projection of the edge of the first electrode 60 close to the first sub-portion 401 on the substrate 10 and the center 701 of the orthographic projection of the light-emitting area 70 of the light-emitting device on the substrate 10 along the first direction X is greater than the distance L4 between the orthographic projection of the edge of the first electrode 60 close to the second sub-portion 402 on the substrate 10 and the center 701 of the orthographic projection of the light-emitting area 70 of the light-emitting device on the substrate 10 along the first direction X. In a feasible manner, the orthographic projection of the first electrode 60 on the substrate 10 overlaps with the orthographic projection of the first sub-portion 401 on the substrate 10, and the orthographic projection of the first electrode 60 on the substrate 10 is located outside the orthographic projection of the second sub-portion 402 on the substrate 10, which is equivalent to the orthographic projection of the first electrode 60 on the substrate 10 not overlapping or staggered with the orthographic projection of the second sub-portion 402 on the substrate 10. In a feasible manner, the orthographic projection of the first electrode 60 on the substrate 10 is located within the orthographic projection of the second electrode 20 on the substrate 10. In one embodiment, the length L11 of the overlapping portion of the side of the first electrode 60 close to the first sub-portion 401 and the orthographic projection of the pixel defining portion 31 on the substrate 10 along the first direction X is greater than the length L21 of the overlapping portion of the side of the first electrode 60 close to the second sub-portion 402 and the orthographic projection of the pixel defining portion 31 on the substrate 10 along the first direction X. In a feasible manner, the distance L22 between the orthographic projection of the edge of the first electrode 60 close to the second sub-portion 402 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X is greater than or equal to the distance L23 between the orthographic projection of the edge of the second electrode 20 close to the second sub-portion 402 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X. Thus, the second electrode 20 overlaps with the first sub-portion 401 in the isolation structure 40, which is equivalent to the first sub-portion 401 being the overlapping side, and the second electrode 20 is spaced from the second sub-portion 402 in the isolation structure 40, that is, not overlapping, which is equivalent to the second sub-portion 402 being the non-overlapping side. The second electrode 20 can cover the pixel defining portion 31 of the first electrode 60 away from the substrate 10 side. Thus, in the process of manufacturing the display panel, the pixel defining portion 31 of the first electrode 60 away from the substrate 10 side is protected from etching, and the first electrode 60 is protected from etching damage, thereby reducing the dark spot problem of the display panel caused by damage to the first electrode 60. In a feasible manner, the first electrode 60 is implemented as an anode.

[0145] For example, the first electrode 60 covers a surface of the pixel defining portion 31 that is close to the second sub-portion 402 and is away from the substrate 10 .

[0146] In the display panel of the embodiment of the present application, the second electrode 20 is formed by an evaporation process using a preset evaporation angle θ4. The evaporation source 120 is used to provide the evaporation material required for the evaporation process. In one feasible manner, the evaporation source 120 includes a nozzle; wherein the angle between the orientation of the nozzle of the evaporation source 120 (e.g., the spraying direction of the nozzle) and the substrate 10 is the evaporation angle. In one feasible manner, the evaporation source 120 may be a linear evaporation source, which extends along a first direction X and can move along a second direction Y. In one feasible manner, as Figure 8 As shown, the second direction Y intersects the first direction X, for example, the second direction Y is perpendicular to the first direction X. For example, the sum of the angle between the spray direction of the nozzle of the evaporation source 120 and the thickness direction of the substrate (or the direction perpendicular to the substrate) and the evaporation angle is 90 degrees. Figure 4 As shown, in one feasible manner, the angle θ3 between the line L7 connecting the side of the side wall of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the second sub-portion 402 away from the substrate 10 and the edge of the isolation opening 110, and the surface of the pixel defining portion 31 away from the substrate 10, is less than or equal to the angle θ1 between the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the side of the pixel defining portion 31 close to the substrate 10, so that the first electrode 60 covers the surface of the side of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10. In one feasible manner, the evaporation angle θ4 when forming the second electrode 20 by the evaporation process is greater than or equal to the angle θ1 between the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the side of the pixel defining portion 31 close to the substrate 10. As Figure 2a , shows the evaporation angle θ4 when the second electrode 20 is formed by an evaporation process. In one feasible manner, the angle θ3 between the line L7 connecting the side of the side wall of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the second sub-portion 402 away from the substrate 10 toward the edge of the isolation opening 110, and the surface of the pixel defining portion 31 away from the substrate 10, is less than or equal to the evaporation angle θ4 when the second electrode 20 is formed by an evaporation process. In an optional embodiment, the minimum value of the evaporation angle θ4 when the second electrode 20 is formed by an evaporation process is greater than θ1. Thereby, it is ensured that the second electrode 20 will not be blocked by the pixel defining portion 31 during evaporation to form the second electrode 20. Figure 1 , so that the pixel opening 32 between the first sub-section 401 and the second sub-section 402 can be completely covered by the second electrode 20, thereby preventing the first electrode 60 from being damaged by etching, reducing the dark spot problem of the display panel caused by damage to the first electrode 60; at the same time, the second electrode 20 on the pixel opening 32 between the first sub-section 401 and the second sub-section 402 is evenly distributed, reducing the problem of abnormal pixel light emission. The evaporation angle can be the angle between the spray direction of the nozzle in the evaporation source and the substrate.

[0147] In one feasible manner, the distance L8 between the orthographic projection of the side of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X is greater than or equal to the height h1 of the isolation structure 40 along the thickness direction of the substrate 10 divided by the tangent value of the first angle, wherein the first angle is equal to the angle θ1 between the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the side of the pixel defining portion 31 close to the substrate 10. That is, L8≥h1 / (tanθ1). In an optional embodiment, the first angle is an acute angle. As a result, the pixel opening 32 between the first sub-portion 401 and the second sub-portion 402 can be completely covered by the second electrode 20, thereby preventing the first electrode 60 from being damaged by etching, reducing the dark spot problem of the display panel caused by damage to the first electrode 60; at the same time, the second electrode 20 on the pixel opening 32 between the first sub-portion 401 and the second sub-portion 402 is evenly distributed, reducing the problem of abnormal pixel light emission.

[0148] A distance L8 between the orthographic projection of the side of the sidewall of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X is greater than or equal to the height h1 of the isolation structure 40 along the thickness direction of the substrate 10 divided by the tangent value of the minimum evaporation angle when the second electrode is formed by the evaporation process. When the minimum evaporation angle is used, L8≥h1 / (tanθ1).

[0149] In a feasible manner, θ1 is less than or equal to the second angle θ2, θ3 is less than or equal to the second angle θ2, and the evaporation angle θ4 when the second electrode 20 is formed by the evaporation process is less than or equal to the second angle θ2. In a feasible manner, the angle θ3 between the side of the side wall of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the second sub-portion 402 away from the substrate 10 and the edge of the isolation opening 110, and the surface of the pixel defining portion 31 away from the substrate 10 is less than or equal to the second angle θ2. Figure 4As shown, the distance L5 between the orthographic projection of the side wall of the first sub-isolation structure 41 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 and the orthographic projection of the side wall of the second sub-isolation structure 42 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 along the first direction X is equal to the height h2 of the second sub-isolation structure 42 along the thickness direction of the substrate 10 divided by the tangent value of the second angle θ2, that is, L5=h2 / tanθ2. In a feasible manner, the distance L6 between the orthographic projection of the side wall of the first sub-isolation structure 41 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 and the orthographic projection of the side wall of the second sub-isolation structure 42 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 away from the substrate 10 along the first direction X is equal to the height h1 of the isolation structure 40 along the thickness direction of the substrate 10 divided by the tangent value of the second angle θ2, that is, L6=h1 / tanθ2.

[0150] For example, the distance L8 between the orthographic projection of the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X and the orthographic projection of the second sub-portion 402 on the substrate 10 is greater than or equal to the height of the isolation structure 40 along the thickness direction of the substrate 10 divided by the tangent value of the second angle θ2, that is, L8 ≥ h1 / (tanθ2).

[0151] For example, the distance L8 between the orthographic projection of the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X and the orthographic projection of the second sub-portion 402 on the substrate 10 is greater than or equal to the height of the isolation structure 40 along the thickness direction of the substrate 10 divided by the tangent value of the maximum evaporation angle when the second electrode 20 is formed by the evaporation process.

[0152] For example, a distance L5 between an orthographic projection of the side wall of the first sub-isolation structure 41 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 and an orthographic projection of the side wall of the second sub-isolation structure 42 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 along the first direction X is less than or equal to a height h2 of the second sub-isolation structure 42 along the thickness direction of the substrate 10, divided by a tangent value of a maximum evaporation angle when the second electrode 20 is formed by an evaporation process.

[0153] For example, a distance L6 along the first direction X between an orthographic projection of the side wall of the first sub-isolation structure 41 of the first sub-portion 401 toward the isolation opening 110 on the substrate 10 and an orthographic projection of the side wall of the second sub-isolation structure 42 of the first sub-portion 401 toward the isolation opening 110 away from the substrate 10 on the substrate 10 is less than or equal to a height h1 of the isolation structure 40 along the thickness direction of the substrate 10, divided by a tangent value of a maximum evaporation angle when the second electrode 20 is formed by an evaporation process.

[0154] For example, when the second electrode 20 is formed by an evaporation process, the evaporation angle θ4 is less than or equal to the second angle θ2 , so as to achieve reliable overlap between the second electrode 20 and the first sub-portion 401 .

[0155] It should be mentioned that the thickness of the first sub-isolation structure 41 in the isolation structure 40 is extremely thin, and the line L7 connecting the side of the side wall of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the second sub-portion 402 away from the substrate 10 toward the edge of the isolation opening 110 can be a line connecting the side of the side of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the edge of the first sub-isolation structure 41 facing the isolation opening 110 away from the substrate 10, or a line connecting the side of the side of the side of the pixel defining portion 31 close to the second sub-portion 402 away from the substrate 10 and the side of the edge of the first sub-isolation structure 41 facing the isolation opening 110 close to the substrate 10.

[0156] The range of the evaporation angle θ4 when forming the second electrode 20 by the evaporation process is greater than or equal to the first angle θ1 and less than or equal to the second angle θ2. Thus, the distance between adjacent light-emitting devices is narrow, and the second electrode 20 will not be blocked by the pixel defining portion 31 when evaporating. Figure 1 , so that the pixel opening 32 between the first sub-section 401 and the second sub-section 402 can be completely covered by the second electrode 20, thereby preventing the first electrode 60 from being damaged by etching, reducing the dark spot problem of the display panel caused by damage to the first electrode 60; at the same time, the second electrode 20 on the pixel opening 32 between the first sub-section 401 and the second sub-section 402 is evenly distributed, reducing the problem of abnormal pixel light emission. For example, when the second electrode 20 is formed by the evaporation process, the evaporation angle θ4 is less than or equal to the second angle θ2, so as to achieve reliable overlap between the second electrode and the first sub-section 401, reliable electrical connection, and reduce resistance.

[0157] In one possible approach, Figure 7As shown, the display panel in the embodiment of the present application further includes a first encapsulation layer 80, and the first encapsulation layer includes a plurality of encapsulation parts 801, and light-emitting devices of different luminous colors correspond to different encapsulation parts 801. In one feasible manner, the first encapsulation layer 80 and / or the encapsulation part 801 are located on the side of the light-emitting device away from the substrate 10, and the first encapsulation layer 80 and / or the encapsulation part 801 cover the side of the light-emitting device away from the substrate 10, and extend to the side of the first sub-part 401 and the second sub-part 402 away from the substrate 10, which can isolate water vapor, oxygen and other substances, and extend the service life of the display panel. In an optional embodiment, the display panel in the embodiment of the present application further includes a second encapsulation layer 90 and / or a third encapsulation layer 100, and the second encapsulation layer 90 is located on the side of the first encapsulation layer 80 away from the substrate 10, and the third encapsulation layer 100 is located on the side of the second encapsulation layer 90 away from the substrate 10. In one feasible manner, the first encapsulation layer 80 includes an inorganic material; and / or, the material of the third encapsulation layer 100 includes an inorganic material; and / or, the material of the second encapsulation layer 90 includes an organic material.

[0158] Therefore, the display panel provided in the embodiment of the present application adopts a single-sided overlap mode of the second electrode 20 to ensure that the light-emitting device successfully emits light when the distance between adjacent light-emitting devices is narrow; at the same time, on the overlapping side, the distance L3 between the orthographic projection of the edge of the first electrode 60 close to the first sub-portion 401 on the substrate 10 and the center 701 of the orthographic projection of the light-emitting area 70 on the substrate 10 along the first direction X is greater than the distance L4 between the orthographic projection of the edge of the first electrode 60 close to the second sub-portion 402 on the non-overlapping side and the center 701 of the orthographic projection of the light-emitting area 70 on the substrate 10 along the first direction X. Therefore, when the second electrode 20 is overlapped on one side, the second electrodes 20 on the overlapping side and the non-overlapping side can protect the pixel defining portion 31 and the first electrode 60 to prevent them from being damaged by etching; at the same time, the pixel defining portion 31 is defined to prevent the formation of a shadow area due to the obstruction of the pixel defining portion 31 during the evaporation process of the second electrode 20, thereby solving the dark spot problem caused by damage to the first electrode 60 and improving the yield rate of the display panel.

[0159] In this embodiment, the isolation structure can enclose a plurality of isolation openings. The setting of the isolation structure can form film layers of light-emitting devices of different colors in different isolation openings without the need for a fine metal mask plate, thereby reducing the manufacturing cost of the display panel. The isolation structure can isolate the light-emitting material layer and the second electrode in the light-emitting device, so that different light-emitting devices are independent of each other, so as to improve the crosstalk between adjacent light-emitting devices and enhance the display effect. Adjacent light-emitting devices can be independently packaged to improve the packaging yield. At the same time, due to the existence of the isolation structure, the light-emitting material layer and the second electrode in the light-emitting device of each color in the display panel can be first prepared on the entire surface and then patterned, thereby eliminating the fine metal mask plate to save the manufacturing cost of the display panel.

[0160] The embodiment of the present application further provides a second display panel, including:

[0161] substrate 10;

[0162] The isolation structure 40 is also included, which is disposed on the substrate 10 and encloses the isolation opening 110. The isolation structure 40 includes a first sub-portion 401 and a second sub-portion 402, which are located on opposite sides of the isolation opening 110 along a first direction X. In a feasible manner, the first direction X is parallel to the substrate 10.

[0163] It also includes a plurality of light-emitting devices, which can realize the color display of the display panel. The light-emitting device is at least partially located in the isolation opening 110, and the light-emitting device includes a first electrode 60, a light-emitting functional layer 50, and a second electrode 20 which are sequentially stacked in a direction away from the substrate 10. The second electrode 20 overlaps with the first sub-portion 401 on one side, which is equivalent to the overlapping side, and the second electrode 20 is spaced apart from the second sub-portion 402, which is equivalent to the non-overlapping side. When the PDL Gap is small, the electrical signal is transmitted to the second electrode 20 through the isolation structure 40, thereby further realizing the light-emitting function of the light-emitting device. In a feasible manner, the orthographic projection of the first electrode 60 on the substrate 10 overlaps with the orthographic projection of the first sub-portion 401 on the substrate 10, and the orthographic projection of the first electrode 60 on the substrate 10 is located outside the orthographic projection of the second sub-portion 402 on the substrate 10, which is equivalent to the orthographic projection of the first electrode 60 on the substrate 10 not overlapping or staggered with the orthographic projection of the second sub-portion 402 on the substrate 10. Therefore, the second electrode 20 overlaps with the first sub-portion 401 in the isolation structure 40, which is equivalent to the first sub-portion 401 being the overlapping side, and the second electrode 20 and the second sub-portion 402 in the isolation structure 40 are spaced apart, that is, not overlapping, which is equivalent to the second sub-portion 402 being the non-overlapping side. The second electrode 20 can cover the pixel defining portion 31 of the first electrode 60 away from the substrate 10 side. Therefore, during the preparation process of the display panel, the pixel defining portion 31 of the first electrode 60 away from the substrate 10 side is protected from etching, thereby protecting the first electrode 60 from etching damage, thereby reducing the dark spot problem of the display panel caused by damage to the first electrode 60.

[0164] The implementation of other structures of the display panel in this solution refers to the description of the corresponding parts in the above embodiments, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments.

[0165] The embodiment of the present application further provides a third display panel, including:

[0166] substrate 10;

[0167] The pixel definition layer is also provided on the substrate 10, and the pixel definition layer includes a pixel definition part 31. In a feasible manner, the pixel definition part 31 encloses a plurality of pixel openings 32, and the pixel openings 32 are gradually enlarged in a direction away from the substrate 10, and are used to carry the light emitting device.

[0168] The device further includes an isolation structure 40, which is disposed on the substrate 10 and can isolate the plurality of light-emitting devices from each other. In a feasible manner, the isolation structure 40 is disposed on a side of the pixel defining portion 31 away from the substrate 10. The isolation structure 40 encloses and forms an isolation opening 110, and the orthographic projection of the pixel opening 32 on the substrate 10 is located within the orthographic projection of the isolation opening 110 on the substrate 10. Figure 4As shown, the isolation structure 40 includes a first sub-portion 401 and a second sub-portion 402 , which are located on two opposite sides of the isolation opening 110 along a first direction X. In a feasible manner, the first direction X is parallel to the substrate 10 .

[0169] It also includes a plurality of light-emitting devices, which can realize the color display of the display panel. The light-emitting device is at least partially located in the isolation opening 110, and the light-emitting device includes a first electrode 60, a light-emitting functional layer 50, and a second electrode 20 which are sequentially stacked in a direction away from the substrate 10. The second electrode 20 overlaps with the first sub-section 401, which is equivalent to the overlapping side, and the second electrode 20 is spaced from the second sub-section 402, which is equivalent to the non-overlapping side. When the PDL Gap is small, the electrical signal is transmitted to the second electrode 20 through the isolation structure 40, thereby further realizing the light-emitting function of the light-emitting device. In a feasible manner, the second electrode 20 overlaps with the second sub-isolation structure 42 in the first sub-section 401. In a feasible manner, the pixel opening 32 exposes part of the first electrode 60, whereby the first electrode 60 combines with the second electrode 20 to jointly make the light-emitting functional layer 50 in the light-emitting device emit light, thereby realizing the color display of the display panel.

[0170] In a feasible manner, the distance L1 between the orthographic projection of the edge of the pixel defining portion 31 close to the first sub-portion 401 on the substrate 10 and the orthographic projection of the first sub-portion 401 on the substrate 10 along the first direction X is smaller than the distance L2 between the orthographic projection of the edge of the pixel defining portion 31 close to the second sub-portion 402 on the substrate 10 and the orthographic projection of the second sub-portion 402 on the substrate 10 along the first direction X. The second electrode 20 is spaced apart from the second sub-portion 402, which is equivalent to the non-overlapping side. When the distance L2 between the orthographic projection of the edge of the pixel defining portion 31 on the substrate 10 and the orthographic projection of the isolation structure 40 on the substrate 10 along the first direction X is too short, the pixel opening 32 may be formed as follows: Figure 1 The shadow area shown in the figure is an area that cannot be covered by the evaporated second electrode 20, or an area that partially has a small amount of uneven second electrode 20, such as Figure 3 As shown in , there is a transition zone with uneven thickness in the second electrode 20, resulting in that part of the area above the pixel opening 32 in the isolation opening 110 is not covered by the second electrode 20, and the area covered by the second electrode 20 is uneven in thickness. The second electrode 20 and the second sub-portion 402 in the isolation structure 40 are arranged at intervals, that is, they are not overlapped, which is equivalent to the second sub-portion 402 being the non-overlapping side, L2 is relatively long, and the second electrode 20 can be completely covered above the pixel opening 32, thereby preventing the first electrode 60 from being damaged by etching, and reducing the dark spot problem of the display panel caused by damage to the first electrode 60; at the same time, the second electrode 20 above the pixel opening 32 is evenly distributed, reducing the problem of abnormal pixel light emission.

[0171] The implementation of other structures of the display panel in this solution refers to the description of the corresponding parts in the above embodiments, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments.

[0172] The embodiment of the present application further provides a fourth display panel, including:

[0173] substrate 10;

[0174] The device further comprises a pixel definition layer disposed on the substrate 10, wherein the pixel definition layer comprises a pixel definition portion 31. In a feasible manner, the pixel definition portion 31 encloses a plurality of pixel openings 32, and the pixel openings 32 are gradually enlarged in a direction away from the substrate 10, and are used to carry the light emitting device.

[0175] The device further includes an isolation structure 40, which is disposed on the substrate 10 and can isolate the plurality of light-emitting devices from each other. In a feasible manner, the isolation structure 40 is disposed on a side of the pixel defining portion 31 away from the substrate 10. The isolation structure 40 encloses and forms an isolation opening 110, and the orthographic projection of the pixel opening 32 on the substrate 10 is located within the orthographic projection of the isolation opening 110 on the substrate 10. Figure 4 As shown, the isolation structure 40 includes a first sub-portion 401 and a second sub-portion 402 , which are located on two opposite sides of the isolation opening 110 along a first direction X. In a feasible manner, the first direction X is parallel to the substrate 10 .

[0176] It also includes a plurality of light-emitting devices, which can realize the color display of the display panel. The light-emitting device is at least partially located in the isolation opening 110, and the light-emitting device includes a first electrode 60, a light-emitting functional layer 50, and a second electrode 20 which are sequentially stacked in a direction away from the substrate 10. The second electrode 20 overlaps with the first sub-section 401, which is equivalent to the overlapping side, and the second electrode 20 is spaced from the second sub-section 402, which is equivalent to the non-overlapping side. When the PDL Gap is small, the electrical signal is transmitted to the second electrode 20 through the isolation structure 40, thereby further realizing the light-emitting function of the light-emitting device. In a feasible manner, the second electrode 20 overlaps with the second sub-isolation structure 42 in the first sub-section 401. In a feasible manner, the pixel opening 32 exposes part of the first electrode 60, whereby the first electrode 60 combines with the second electrode 20 to jointly make the light-emitting functional layer 50 in the light-emitting device emit light, thereby realizing the color display of the display panel.

[0177] In a feasible manner, the orthographic projection of the first electrode 60 on the substrate 10 overlaps with the orthographic projection of the first sub-portion 401 on the substrate 10, and the orthographic projection of the first electrode 60 on the substrate 10 is located outside the orthographic projection of the second sub-portion 402 on the substrate 10, which is equivalent to the orthographic projection of the first electrode 60 on the substrate 10 not overlapping or staggered with the orthographic projection of the second sub-portion 402 on the substrate 10. In an optional embodiment, the length of the overlapping portion of the side of the first electrode 60 close to the first sub-portion 401 and the orthographic projection of the pixel defining portion 31 on the substrate 10 along the first direction X is greater than the length of the overlapping portion of the side of the first electrode 60 close to the second sub-portion 402 and the orthographic projection of the pixel defining portion 31 on the substrate 10 along the first direction X. Therefore, the second electrode 20 overlaps with the first sub-portion 401 in the isolation structure 40, which is equivalent to the overlapping side corresponding to the first sub-portion 401, and the second electrode 20 and the second sub-portion 402 in the isolation structure 40 are arranged at intervals, that is, they are not overlapped, which is equivalent to the non-overlapping side corresponding to the second sub-portion 402. The second electrode 20 can cover the pixel defining portion 31 of the first electrode 60 away from the substrate 10. Therefore, during the preparation process of the display panel, the pixel defining portion 31 of the first electrode 60 away from the substrate 10 is protected from etching, and then the first electrode 60 is protected from etching damage, thereby reducing the dark spot problem of the display panel caused by damage to the first electrode 60.

[0178] The implementation of other structures of the display panel in this solution refers to the description of the corresponding parts in the above embodiments, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments.

[0179] The embodiment of the present application further provides a fifth display panel, including:

[0180] substrate 10;

[0181] The device further comprises a pixel definition layer disposed on the substrate 10, wherein the pixel definition layer comprises a pixel definition portion 31. In a feasible manner, the pixel definition portion 31 encloses a plurality of pixel openings 32, and the pixel openings 32 are gradually enlarged in a direction away from the substrate 10, and are used to carry the light emitting device.

[0182] The device further includes an isolation structure 40, which is disposed on the substrate 10 and can isolate the plurality of light-emitting devices from each other. In one feasible manner, the isolation structure 40 is disposed on a side of the pixel defining portion 31 away from the substrate 10. The isolation structure 40 encloses and forms an isolation opening 110, and the orthographic projection of the pixel opening 32 on the substrate 10 is located within the orthographic projection of the isolation opening 110 on the substrate 10. Figure 4 As shown, the isolation structure 40 includes a first sub-portion 401 and a second sub-portion 402 , which are located on two opposite sides of the isolation opening 110 along a first direction X. In a feasible manner, the first direction X is parallel to the substrate 10 .

[0183] It also includes a plurality of light-emitting devices, which can realize the color display of the display panel. The light-emitting device is at least partially located in the isolation opening 110, and the light-emitting device includes a first electrode 60, a light-emitting functional layer 50, and a second electrode 20 which are sequentially stacked in a direction away from the substrate 10. The second electrode 20 overlaps with the first sub-section 401 on one side, which is equivalent to the overlapping side, and the second electrode 20 is spaced apart from the second sub-section 402, which is equivalent to the non-overlapping side. When the PDL Gap is small, the electrical signal is transmitted to the second electrode 20 through the isolation structure 40, thereby further realizing the light-emitting function of the light-emitting device. In a feasible manner, the second electrode 20 overlaps with the second sub-isolation structure 42 in the first sub-section 401. In a feasible manner, the pixel opening 32 exposes part of the first electrode 60, whereby the first electrode 60 combines with the second electrode 20 to jointly make the light-emitting functional layer 50 in the light-emitting device emit light, thereby realizing the color display of the display panel.

[0184] In a feasible manner, the angle θ1 between the side wall of the pixel defining portion 31 close to the second sub-portion 402 and the side of the pixel defining portion 31 close to the substrate 10 is less than or equal to the second angle θ2. The distance L5 along the first direction X between the orthographic projection of the side wall of the first sub-isolation structure 41 of the first sub-portion 401 facing the isolation opening 110 on the substrate 10 and the orthographic projection of the side wall of the second sub-isolation structure 42 of the first sub-portion 401 facing the isolation opening 110 on the substrate 10 is equal to the height h2 of the second sub-isolation structure 42 along the thickness direction of the substrate 10 divided by the tangent value of the second angle θ2, that is, L5 = h2 / tanθ2. Thus, the shadow area is prevented from being formed due to the obstruction of the pixel defining portion 31 during the evaporation process of the second electrode 20, thereby solving the dark spot problem caused by damage to the first electrode 60 and improving the yield rate of the display panel.

[0185] The implementation of other structures of the display panel in this solution refers to the description of the corresponding parts in the above embodiments, which will not be repeated here. This embodiment can be combined with some or all of the features in the above embodiments.

[0186] The embodiment of the present application further provides a display device, including the display panel as described above. The display device may include a mobile phone, a tablet computer, a palm computer, a PAD, and other forms.

[0187] See also Fig. 9 As shown, the embodiment of the present application further provides a method for preparing a display panel, which can be used to prepare the display panel in the above embodiment. The method for preparing a display panel includes:

[0188] S102. Form a first electrode of the light-emitting device on the substrate.

[0189] There may be multiple light emitting devices.

[0190] S104. An isolation structure is formed on the substrate, wherein the isolation structure encloses an isolation opening.

[0191] At least part of the light emitting device is located at the isolation opening; wherein the isolation structure comprises a first sub-portion and a second sub-portion, which are located at two opposite sides of the isolation opening along a first direction; and the first direction is parallel to the substrate.

[0192] S106. Form a light-emitting functional layer and a second electrode of the light-emitting device in the isolation opening.

[0193] The second electrode is overlapped with the first sub-section; and the second electrode is spaced apart from the second sub-section.

[0194] The distance along the first direction between the orthographic projection of the edge of the first electrode close to the first sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate is greater than the distance along the first direction between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate.

[0195] In a feasible manner, the orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is located outside the orthographic projection of the second sub-portion on the substrate.

[0196] For example, Fig.10 As shown, the isolation opening includes a first isolation opening 110 and a second isolation opening 140, the light emitting device includes a first light emitting device and a second light emitting device, and the light emitting function layer and the second electrode of the light emitting device formed in the isolation opening include:

[0197] A first light emitting material layer 151, a first electrode material layer 152, and a first packaging material layer 153 are formed, and the film structure formed is as follows: Fig.10 (a)

[0198] The first light emitting material layer 151, the first electrode material layer 152, and the first packaging material layer 153 of the second isolation opening 140 are etched. Fig.10 As shown in (b), the first light-emitting material layer 151, the first electrode material layer 152, and the first packaging material layer 153 of the first isolation opening 110 are retained by covering the photoresist 130 to form the light-emitting function layer and the second electrode of the first light-emitting device, as well as the packaging part located on the side of the first light-emitting device away from the substrate, and finally form Fig.10 (c) The film structure shown;

[0199] Since the distance along the first direction between the orthographic projection of the edge of the first electrode close to the first sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate is greater than the distance along the first direction between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the center of the orthographic projection of the light-emitting area of ​​the light-emitting device on the substrate, when etching the first light-emitting material layer 151, the first electrode material layer 152, and the first packaging material layer 153 of the second isolation opening 140, the portion of the first electrode close to the second sub-portion is shorter and can be shielded and protected by the first light-emitting material layer 151 and the first electrode material layer 152, and therefore will not be affected by etching.

[0200] A second light emitting material layer 161, a second electrode material layer 162, and a second packaging material layer 163 are formed. Fig.10 (d)

[0201] The second light emitting material layer 161, the second electrode material layer 162, and the second packaging material layer 163 of the first isolation opening 110 are etched. Fig.10 As shown in (e), the second light-emitting material layer 161, the second electrode material layer 162, and the second packaging material layer 163 of the second isolation opening 140 are retained by covering the photoresist 130 to form the light-emitting function layer and the second electrode of the second light-emitting device, as well as the packaging part located on the side of the second light-emitting device away from the substrate, and finally form Fig.10 (f) The film structure shown in FIG.

[0202] In a feasible manner, before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate;

[0203] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode;

[0204] The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction;

[0205] In an optional embodiment, the length of the overlapping portion of the first electrode's side close to the first sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction is greater than the length of the overlapping portion of the first electrode's side close to the second sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction.

[0206] In a feasible manner, an angle between a line connecting a side of a side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the side of the second sub-portion away from the substrate facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0207] and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and the orthographic projection of the second sub-portion on the substrate along the first direction and the orthographic projection of the second sub-portion on the substrate is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a first angle, and the first angle is equal to an angle between the side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate;

[0208] And / or, when the second electrode is formed by an evaporation process, an evaporation angle is greater than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate.

[0209] Optionally, the first angle is an acute angle;

[0210] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0211] In one feasible manner, the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate;

[0212] The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate.

[0213] In a feasible manner, an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate is less than or equal to the second angle;

[0214] and / or, the distance between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-section facing the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-section facing the isolation opening on the substrate along the first direction is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle,

[0215] And / or, when the second electrode is formed by an evaporation process, an evaporation angle is less than or equal to the second angle.

[0216] Optionally, the evaporation angle is an angle between a spraying direction of a nozzle in the evaporation source and the substrate.

[0217] See also Fig.11 As shown, the embodiment of the present application also provides another method for preparing a display panel, which can be used to prepare the display panel in the above embodiment. The method for preparing a display panel includes:

[0218] S202. Form a first electrode of the light-emitting device on the substrate.

[0219] S204. forming a pixel definition layer on a side of the first electrode away from the substrate;

[0220] The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, and the pixel opening exposes a portion of the first electrode.

[0221] S206. Forming an isolation structure on the substrate, the isolation structure enclosing an isolation opening;

[0222] Wherein, at least part of the light-emitting device is located in the isolation opening; wherein, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, and the isolation structure includes a first sub-portion and a second sub-portion, which are located on opposite sides of the isolation opening along a first direction; and the first direction is parallel to the substrate.

[0223] S208. forming a light-emitting functional layer and a second electrode of the light-emitting device in the isolation opening; wherein the pixel defining portion is located between the first electrode and the second electrode, the second electrode overlaps the first sub-portion; and the second electrode is spaced apart from the second sub-portion;

[0224] The evaporation angle when the second electrode is formed by the evaporation process is greater than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate; and / or, the evaporation angle when the second electrode is formed by the evaporation process is less than or equal to the second angle, the isolation structure includes a first sub-isolation structure and a second sub-isolation structure stacked in sequence along a direction close to the substrate; the orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; the distance between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-portion facing the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-portion facing the isolation opening on the substrate along the first direction, The angle between the pixel defining portion and the substrate is equal to the height of the second sub-isolation structure in the thickness direction of the substrate divided by the tangent value of the second angle; and / or, the evaporation angle when the second electrode is formed by the evaporation process is greater than or equal to the angle between a line connecting the side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and the side of the second sub-portion away from the substrate facing the edge of the isolation opening, and the surface of the pixel defining portion away from the substrate; and / or, the angle between a line connecting the side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and the side of the second sub-portion away from the substrate facing the edge of the isolation opening, and the surface of the pixel defining portion away from the substrate is less than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate.

[0225] The various implementations of the above embodiments of the present application can be used in combination or in association.

[0226] The above implementation methods are only used to illustrate the embodiments of the present application, and are not limitations on the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application. The scope of patent protection of the embodiments of the present application should be limited by the claims.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; the isolation structure includes a first sub-section and a second sub-section, which are located on two opposite sides of the isolation opening along a first direction; The first direction is parallel to the substrate; A light emitting device, at least a portion of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; The second electrode overlaps the first sub-portion; the second electrode is spaced apart from the second sub-portion; A distance along the first direction between an orthographic projection of an edge of the first electrode close to the first sub-portion on the substrate and a center of an orthographic projection of a light-emitting area of ​​the light-emitting device on the substrate is greater than a distance along the first direction between an orthographic projection of an edge of the first electrode close to the second sub-portion on the substrate and a center of an orthographic projection of a light-emitting area of ​​the light-emitting device on the substrate.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is outside the orthographic projection of the second sub-portion on the substrate; And / or, the distance between the orthographic projection of the edge of the first electrode close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the distance between the orthographic projection of the edge of the second electrode close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction.

3. The display panel according to claim 1, characterized in that: Also includes pixel definition layer, The pixel definition layer comprises a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode; The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction; Preferably, the orthographic projection of a side of the pixel opening close to the substrate on the substrate coincides with the orthographic projection of the light-emitting area on the substrate; Preferably, a length of an overlapping portion of a side of the first electrode close to the first sub-portion and an orthographic projection of the pixel defining portion on the substrate along the first direction is greater than a length of an overlapping portion of a side of the first electrode close to the second sub-portion and an orthographic projection of the pixel defining portion on the substrate along the first direction; Preferably, the first electrode covers a surface of the pixel defining portion that is close to the second sub-portion and away from the substrate; Preferably, the pixel definition layer comprises an inorganic insulating layer.

4. The display panel according to claim 1, characterized in that: Also includes pixel definition layer, The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode. The angle between a line connecting a side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the side of the second sub-portion away from the substrate and facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate; and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and an orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a first angle, wherein the first angle is equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate; and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and an orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a minimum evaporation angle when the second electrode is formed by an evaporation process; and / or, when the second electrode is formed by an evaporation process, an evaporation angle is greater than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate; And / or, an angle between a line connecting a side of a side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the second sub-portion away from the substrate and facing the isolation opening, and a surface of the pixel defining portion away from the substrate, is less than or equal to a vapor deposition angle when the second electrode is formed by a vapor deposition process; preferably, the first angle is an acute angle; Preferably, the evaporation angle is an angle between a spraying direction of a nozzle in an evaporation source and the substrate.

5. The display panel according to claim 1, characterized in that: The isolation structure comprises a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate.

6. The display panel according to claim 5, characterized in that: The isolation structure comprises a conductive material, and the second electrode is electrically connected to the isolation structure; and / or, the second electrodes of the plurality of light-emitting devices are electrically connected via the isolation structure; And / or, the material of the first sub-isolation structure includes titanium, and / or, the material of the second sub-isolation structure includes aluminum.

7. The display panel according to claim 5, characterized in that: The isolation structure further includes a third sub-isolation structure, and the third sub-isolation structure is arranged on a side of the second sub-isolation structure close to the substrate; The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the third sub-isolation structure on the substrate; Preferably, the orthographic projection of the third sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; Preferably, the material of the third sub-isolation structure includes molybdenum.

8. The display panel according to claim 5, characterized in that: Also includes pixel definition layer, The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode. An angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate is less than or equal to a second angle; and / or, a distance along the first direction between an orthographic projection of the first sub-isolation structure of the first sub-portion toward the side wall of the isolation opening on the substrate and an orthographic projection of the second sub-isolation structure of the first sub-portion toward the side wall of the isolation opening on the substrate is equal to a height of the second sub-isolation structure along the thickness direction of the substrate divided by a tangent value of the second angle, and / or, a distance along the first direction between an orthographic projection of the side wall of the first sub-isolation structure of the first sub-section facing the isolation opening on the substrate and an orthographic projection of the side wall of the second sub-isolation structure of the first sub-section facing the isolation opening away from the substrate on the substrate is equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of the second angle, and / or, when the second electrode is formed by an evaporation process, an evaporation angle is less than or equal to the second angle; And / or, an angle between a line connecting a side of a side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of a side of the second sub-portion away from the substrate and facing the isolation opening, and a surface of the pixel defining portion away from the substrate is less than or equal to the second angle; And / or, the distance between the orthographic projection of the side of the side wall of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to the height of the isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle; and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and an orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a maximum evaporation angle when the second electrode is formed by an evaporation process; Preferably, the evaporation angle is an angle between a spraying direction of a nozzle in an evaporation source and the substrate.

9. The display panel according to claim 1, characterized in that: The display panel further comprises: a first encapsulation layer, located on a side of the light emitting device away from the substrate; The first encapsulation layer includes a plurality of encapsulation parts, and light-emitting devices of different luminous colors correspond to different encapsulation parts; Preferably, the display panel further includes: a second encapsulation layer, located on a side of the first encapsulation layer away from the substrate; a third encapsulation layer, located on a side of the second encapsulation layer away from the substrate; Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

10. A display panel, characterized in that: include: substrate; An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; The first direction is parallel to the substrate; A light emitting device, at least a portion of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; The second electrode overlaps the first sub-portion; the second electrode is spaced apart from the second sub-portion; The orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is located outside the orthographic projection of the second sub-portion on the substrate.

11. A display panel, characterized in that: include: substrate; A pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel defining portion; The pixel defining portion encloses and forms a pixel opening, An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; The orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, and the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; The first direction is parallel to the substrate; A light emitting device, at least a portion of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; The pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode. The second electrode overlaps the first sub-portion; the second electrode is spaced apart from the second sub-portion; The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction.

12. A display panel, characterized in that: include: substrate; A pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel defining portion; The pixel defining portion encloses and forms a pixel opening, An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; The orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, and the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; The first direction is parallel to the substrate; A light emitting device, at least a portion of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; The pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode. The second electrode overlaps the first sub-portion; the second electrode is spaced apart from the second sub-portion; The length of the overlapping portion of the first electrode's side close to the first sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction is greater than the length of the overlapping portion of the first electrode's side close to the second sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction.

13. A display panel, characterized in that: include: substrate; A pixel definition layer is disposed on the substrate, and the pixel definition layer includes a pixel defining portion; The pixel defining portion encloses and forms a pixel opening, An isolation structure is disposed on the substrate, and the isolation structure encloses an isolation opening; The orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate; the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate; the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; the orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; A light emitting device, at least a portion of which is located in the isolation opening, and the light emitting device comprises a first electrode, a light emitting functional layer, and a second electrode which are sequentially stacked in a direction away from the substrate; The pixel opening exposes a portion of the first electrode, the pixel defining portion is located between the first electrode and the second electrode, and the second electrode overlaps the first sub-portion; the second electrode and the second sub-portion are arranged at an interval; the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate is less than or equal to the second angle; the distance between the orthographic projection of the side wall of the first sub-isolation structure of the first sub-portion toward the isolation opening on the substrate and the orthographic projection of the side wall of the second sub-isolation structure of the first sub-portion toward the isolation opening on the substrate along the first direction is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle.

14. A display device, characterized in that: The display device comprises a display panel as claimed in claims 1-13.

15. A method for preparing a display panel, characterized in that: include: forming a first electrode of the light emitting device on the substrate; forming an isolation structure on the substrate, wherein the isolation structure encloses an isolation opening; At least part of the light emitting device is located in the isolation opening; wherein the isolation structure comprises a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate; A light-emitting functional layer and a second electrode of the light-emitting device are formed in the isolation opening; wherein the second electrode overlaps the first sub-portion; and the second electrode is spaced apart from the second sub-portion; A distance along the first direction between an orthographic projection of an edge of the first electrode close to the first sub-portion on the substrate and a center of an orthographic projection of a light-emitting area of ​​the light-emitting device on the substrate is greater than a distance along the first direction between an orthographic projection of an edge of the first electrode close to the second sub-portion on the substrate and a center of an orthographic projection of a light-emitting area of ​​the light-emitting device on the substrate.

16. The method according to claim 15, characterized in that The orthographic projection of the first electrode on the substrate overlaps with the orthographic projection of the first sub-portion on the substrate, and the orthographic projection of the first electrode on the substrate is outside the orthographic projection of the second sub-portion on the substrate; Preferably, the isolation opening includes a first isolation opening and a second isolation opening, the light emitting device includes a first light emitting device and a second light emitting device, and forming the light emitting function layer and the second electrode of the light emitting device in the isolation opening includes: forming a first light emitting material layer, a first electrode material layer, and a first packaging material layer; Etching the first light-emitting material layer, the first electrode material layer, and the first packaging material layer of the second isolation opening, retaining the first light-emitting material layer, the first electrode material layer, and the first packaging material layer of the first isolation opening to form a light-emitting function layer and a second electrode of the first light-emitting device, and a packaging portion located on a side of the first light-emitting device away from the substrate; forming a second light emitting material layer, a second electrode material layer, and a second encapsulation material layer; The second light-emitting material layer, the second electrode material layer, and the second packaging material layer of the first isolation opening are etched to retain the second light-emitting material layer, the second electrode material layer, and the second packaging material layer of the second isolation opening to form a light-emitting functional layer and a second electrode of the second light-emitting device, and a packaging portion located on the side of the second light-emitting device away from the substrate.

17. The method according to claim 15, characterized in that Before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate; The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode; The distance between the orthographic projection of the edge of the pixel defining portion close to the first sub-portion on the substrate and the orthographic projection of the first sub-portion on the substrate along the first direction is smaller than the distance between the orthographic projection of the edge of the pixel defining portion close to the second sub-portion on the substrate and the orthographic projection of the second sub-portion on the substrate along the first direction; Preferably, the length of the overlapping portion of the side of the first electrode close to the first sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction is greater than the length of the overlapping portion of the side of the first electrode close to the second sub-portion and the orthographic projection of the pixel defining portion on the substrate along the first direction.

18. The method according to claim 15, characterized in that Before forming the isolation structure on the substrate, the method further includes forming a pixel definition layer on a side of the first electrode away from the substrate; The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode; The angle between a line connecting a side of the side wall of the pixel defining portion close to the second sub-portion away from the substrate and an edge of the side of the second sub-portion away from the substrate and facing the isolation opening and a surface of the pixel defining portion away from the substrate is less than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate; and / or, a distance between an orthographic projection of a side of the pixel defining portion close to the second sub-portion and away from the substrate on the substrate and an orthographic projection of the second sub-portion on the substrate along the first direction is greater than or equal to a height of the isolation structure along the thickness direction of the substrate divided by a tangent value of a first angle, wherein the first angle is equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate; and / or, when the second electrode is formed by an evaporation process, an evaporation angle is greater than or equal to an angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate; Preferably, the first angle is an acute angle; Preferably, the evaporation angle is an angle between a spraying direction of a nozzle in an evaporation source and the substrate.

19. The method according to claim 15, characterized in that The isolation structure comprises a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; The orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; Preferably, before forming the isolation structure on the substrate, the method further comprises forming a pixel definition layer on a side of the first electrode away from the substrate; The pixel definition layer includes a pixel defining portion; the pixel defining portion encloses a pixel opening, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, the pixel opening exposes a portion of the first electrode, and the pixel defining portion is located between the first electrode and the second electrode; An angle between a side wall of the pixel defining portion close to the second sub-portion and a side of the pixel defining portion close to the substrate is less than or equal to a second angle; and / or, a distance along the first direction between an orthographic projection of the first sub-isolation structure of the first sub-portion toward the side wall of the isolation opening on the substrate and an orthographic projection of the second sub-isolation structure of the first sub-portion toward the side wall of the isolation opening on the substrate is equal to a height of the second sub-isolation structure along the thickness direction of the substrate divided by a tangent value of the second angle, and / or, when the second electrode is formed by an evaporation process, an evaporation angle is less than or equal to the second angle; Preferably, the evaporation angle is an angle between a spraying direction of a nozzle in an evaporation source and the substrate.

20. A method for preparing a display panel, characterized in that: include: forming a first electrode of the light emitting device on the substrate; forming a pixel definition layer on a side of the first electrode away from the substrate; The pixel definition layer includes a pixel defining portion; The pixel defining portion encloses to form a pixel opening, and the pixel opening exposes a portion of the first electrode; forming an isolation structure on the substrate, wherein the isolation structure encloses an isolation opening; At least part of the light emitting device is located in the isolation opening; wherein the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate, and the isolation structure includes a first sub-portion and a second sub-portion, which are located on two opposite sides of the isolation opening along a first direction; the first direction is parallel to the substrate; A light-emitting functional layer and a second electrode of the light-emitting device are formed in the isolation opening; wherein the pixel defining portion is located between the first electrode and the second electrode, and the second electrode overlaps the first sub-portion; the second electrode and the second sub-portion are arranged at intervals; the evaporation angle when the second electrode is formed by an evaporation process is greater than or equal to the angle between the side wall of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate; and / or the evaporation angle when the second electrode is formed by an evaporation process is less than or equal to the second angle, and the isolation structure includes a first sub-isolation structure and a second sub-isolation structure which are sequentially stacked in a direction close to the substrate; the orthographic projection of the second sub-isolation structure on the substrate is inside the orthographic projection of the first sub-isolation structure on the substrate; the orthographic projection of the first sub-isolation structure of the first sub-portion on the substrate toward the side wall of the isolation opening is within the orthographic projection of the first sub-isolation structure on the substrate The distance along the first direction from the orthographic projection of the side wall of the second sub-isolation structure of the pixel defining portion toward the isolation opening on the substrate is equal to the height of the second sub-isolation structure along the thickness direction of the substrate divided by the tangent value of the second angle; and / or, the evaporation angle when the second electrode is formed by the evaporation process is greater than or equal to the angle between a line connecting the side of the side of the pixel defining portion close to the second sub-portion away from the substrate and the edge of the side of the second sub-portion away from the substrate toward the isolation opening, and the surface of the pixel defining portion away from the substrate; and / or, the angle between a line connecting the side of the side of the pixel defining portion close to the second sub-portion away from the substrate and the edge of the side of the second sub-portion away from the substrate toward the isolation opening, and the surface of the pixel defining portion away from the substrate is less than or equal to the angle between the side of the pixel defining portion close to the second sub-portion and the side of the pixel defining portion close to the substrate.

Images