Display panel, preparation method thereof and display device

Abstract

This application provides a display panel, its fabrication method, and a display device, relating to the field of display technology. The display panel includes a substrate and a plurality of light-emitting units. The light-emitting units are disposed on one side of the substrate, and include a first light-emitting unit and a second light-emitting unit. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. The second light-emitting layer includes a third end and a fourth end opposite to the third end in a first direction. The thickness of the first upper electrode above the first end has a first difference with the thickness of the first upper electrode above the second end, and the thickness of the second upper electrode above the third end has a second difference with the thickness of the second upper electrode above the fourth end. The absolute value of the first difference is not less than the absolute value of the second difference, and the first difference is not equal to 0. The display panel provided by this application can improve the performance / process performance of the display device.

Description

Technical Field

[0001] This application belongs to the field of display technology, and more specifically, relates to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Some display panels have advantages such as low power consumption, high brightness, wide viewing angle, high contrast and flexible display, and are widely used in electronic products such as mobile phones, televisions, tablets, laptops, desktop computers, in-vehicle display terminals, wearable devices, and human-computer interaction terminal devices.

[0003] However, the performance and manufacturing process of the display device need further improvement. Summary of the Invention

[0004] The purpose of this application is to provide a display panel, a method for manufacturing the same, and a display device, so as to improve the performance / process performance of the display device.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, a display panel is provided, including a substrate and a plurality of light-emitting units. The light-emitting units are disposed on one side of the substrate, and each light-emitting unit includes a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a first light-emitting layer and a first upper electrode sequentially stacked along a direction away from the substrate. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. The second light-emitting unit includes a second light-emitting layer and a second upper electrode sequentially stacked along a direction away from the substrate. The second light-emitting layer includes a third end and a fourth end opposite to the third end in a first direction. The thickness of the first upper electrode above the first end has a first difference with the thickness of the first upper electrode above the second end, and the thickness of the second upper electrode above the third end has a second difference with the thickness of the second upper electrode above the fourth end. The absolute value of the first difference is not less than the absolute value of the second difference, and the first difference is not equal to 0. Through this technical solution, the thickness of the first upper electrode of the first light-emitting unit at the two ends opposite to each other in the first direction can be inconsistent; that is, the thickness of the first upper electrode of the first light-emitting unit at one end in the first direction can be greater than 0 but less than the thickness of the other end. The first upper electrode at one end in the first direction can provide some protection to the underlying film layer, which helps to improve reliability.

[0007] Therefore, the display panel provided in this application can improve the performance / process performance of the display device. In some embodiments, the display panel provided in this application further includes a pixel definition layer and an isolation structure. The pixel definition layer is disposed on one side of the substrate and includes a first pixel opening and a second pixel opening. The isolation structure is disposed on the side of the pixel definition layer away from the substrate and includes a first isolation opening and a second isolation opening. The first isolation opening is connected to the first pixel opening, and the second isolation opening is connected to the second pixel opening. A portion of the first light-emitting unit is disposed in the first isolation opening, and a portion of the second light-emitting unit is disposed in the second isolation opening. The pixel definition layer located around the first light-emitting unit has a first minimum thickness, and the pixel definition layer located around the second light-emitting unit has a second minimum thickness. The first minimum thickness is not greater than the second minimum thickness.

[0008] In some embodiments, the plurality of light-emitting units further includes a third light-emitting unit, the pixel definition layer further includes a third pixel opening, the isolation structure further includes a third isolation opening, the third isolation opening and the third pixel opening are connected, and a portion of the third light-emitting unit is disposed within the third isolation opening, wherein:

[0009] The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness is not greater than the third minimum thickness.

[0010] In some implementations, the first minimum thickness, the second minimum thickness, and the third minimum thickness are equal.

[0011] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0012] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the first difference is greater than the absolute value of the third difference.

[0013] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0014] Optionally, both the second upper electrode located above the third end and the second upper electrode located above the fourth end are connected to the isolation structure.

[0015] Optionally, the third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

[0016] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits light in one of blue and green light, and the third light-emitting unit emits light in the other of blue and green light.

[0017] In some implementations, the first minimum thickness is less than the third minimum thickness, and the second minimum thickness is less than the third minimum thickness.

[0018] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0019] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is greater than the absolute value of the second difference.

[0020] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0021] Optionally, both the second upper electrode located above the third end and the second upper electrode located above the fourth end are connected to the isolation structure.

[0022] Optionally, the thickness of the third upper electrode located above the fifth end is greater than the thickness of the third upper electrode located above the sixth end, wherein the third upper electrode located above the fifth end overlaps with the isolation structure, and the third upper electrode located above the sixth end is spaced apart from the isolation structure.

[0023] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

[0024] In some implementations, the first minimum thickness is less than the second minimum thickness, and the first minimum thickness is less than the third minimum thickness.

[0025] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is less than the absolute value of the first difference and the absolute value of the third difference is less than the absolute value of the second difference.

[0026] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0027] Optionally, the thickness of the second upper electrode located above the third end is greater than the thickness of the second upper electrode located above the fourth end, wherein the second upper electrode located above the third end overlaps with the isolation structure, and the second upper electrode located above the fourth end is spaced apart from the isolation structure.

[0028] Optionally, the third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

[0029] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

[0030] In some embodiments, the portion of the first light-emitting layer projected onto the substrate is located outside the projection of the first upper electrode onto the substrate, the projection of the second light-emitting layer onto the substrate is located within the projection of the second upper electrode onto the substrate, and the projection of the third light-emitting layer onto the substrate is located within the projection of the third upper electrode onto the substrate.

[0031] In some embodiments, the portion of the first light-emitting layer projected onto the substrate is located outside the projection of the first upper electrode onto the substrate, the projection of the second light-emitting layer onto the substrate is located within the projection of the second upper electrode onto the substrate, and the portion of the third light-emitting layer projected onto the substrate is located outside the projection of the third upper electrode onto the substrate.

[0032] In some embodiments, the portion of the first light-emitting layer projected onto the substrate is located outside the portion of the first upper electrode projected onto the substrate, the portion of the second light-emitting layer projected onto the substrate is located outside the portion of the second upper electrode projected onto the substrate, and the portion of the third light-emitting layer projected onto the substrate is located within the portion of the third upper electrode projected onto the substrate.

[0033] In some embodiments, the isolation structure includes a first layer, a second layer, and a third layer stacked sequentially in a direction away from the substrate, wherein the orthographic projection of the second layer onto the substrate is within the orthographic projection of the first layer onto the substrate, and the orthographic projection of the surface of the second layer near the third layer onto the substrate is within the orthographic projection of the third layer onto the substrate.

[0034] Optionally, the area of ​​the second layer projected onto the substrate is smaller than the area of ​​the first layer projected onto the substrate, and the area of ​​the second layer surface near the third layer projected onto the substrate is smaller than the area of ​​the third layer projected onto the substrate.

[0035] In some embodiments, the first light-emitting unit further includes a first lower electrode located on the side of the first light-emitting layer facing the substrate, a portion of the first lower electrode being located between the substrate and the pixel definition layer, and another portion being exposed from the first pixel opening; the second light-emitting unit further includes a second lower electrode located on the side of the second light-emitting layer facing the substrate, a portion of the second lower electrode being located between the substrate and the pixel definition layer, and another portion being exposed from the second pixel opening; the third light-emitting unit includes a third light-emitting layer and a third upper electrode sequentially stacked in a direction away from the substrate, and the third light-emitting unit further includes a third lower electrode located on the side of the third light-emitting layer facing the substrate, a portion of the third lower electrode being located between the substrate and the pixel definition layer, and another portion being exposed from the third pixel opening.

[0036] Secondly, this application provides another display panel, which includes a substrate, an isolation structure, and a plurality of light-emitting units. The isolation structure is disposed on one side of the substrate and includes a first isolation opening and a second isolation opening. The light-emitting units include a first light-emitting unit and a second light-emitting unit. A portion of the first light-emitting unit is disposed within the first isolation opening. The first light-emitting unit includes a first light-emitting layer and a first upper electrode that are sequentially stacked in a direction away from the substrate. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. A portion of the second light-emitting unit is disposed within the second isolation opening. The second light-emitting unit includes a second light-emitting layer and a second upper electrode that are sequentially stacked in a direction away from the substrate. The second light-emitting layer includes a third end and a fourth end opposite to the third end in a first direction.

[0037] The thickness of the first upper electrode located above the first end has a first difference with the thickness of the first upper electrode located above the second end, and the thickness of the second upper electrode located above the third end has a second difference with the thickness of the second upper electrode located above the fourth end. The absolute value of the first difference is not less than the absolute value of the second difference.

[0038] Through the above technical solution, the thickness of the first upper electrode of the first light-emitting unit at its two ends in the first direction can be inconsistent. That is, the thickness of one end of the first upper electrode of the first light-emitting unit in the first direction can be greater than 0 but less than the thickness of the other. This end of the first upper electrode in the first direction can, to a certain extent, protect the underlying film layer, which is beneficial to improving reliability. In addition, the other end of the first upper electrode of the first light-emitting unit in the first direction has a better overlap effect with the isolation structure.

[0039] Therefore, the display panel provided in this application can improve the performance / process performance of the display device.

[0040] In some embodiments, the display panel provided in this application further includes a pixel definition layer, which is disposed on one side of the substrate. The pixel definition layer includes a first pixel opening and a second pixel opening. An isolation structure is disposed on the side of the pixel definition layer away from the substrate. The first isolation opening is connected to the first pixel opening, and the second isolation opening is connected to the second pixel opening.

[0041] The pixel definition layer located on the periphery of the first light-emitting unit has a first minimum thickness, and the pixel definition layer located on the periphery of the second light-emitting unit has a second minimum thickness, wherein the first minimum thickness is not greater than the second minimum thickness.

[0042] Thirdly, this application also provides a method for manufacturing a display panel, the method comprising:

[0043] Provide substrate;

[0044] Light-emitting units are fabricated on one side of a substrate. There are multiple light-emitting units, including a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a first light-emitting layer and a first upper electrode that are sequentially stacked in a direction away from the substrate. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. The second light-emitting unit includes a second light-emitting layer and a second upper electrode that are sequentially stacked in a direction away from the substrate. The second light-emitting layer includes a third end and a fourth end opposite to the third end in a first direction.

[0045] The thickness of the first upper electrode located above the first end has a first difference with the thickness of the first upper electrode located above the second end, and the thickness of the second upper electrode located above the third end has a second difference with the thickness of the second upper electrode located above the fourth end. The absolute value of the first difference is not less than the absolute value of the second difference, and the first difference is not equal to 0.

[0046] In some embodiments, before fabricating the light-emitting unit on one side of the substrate, the fabrication method provided in this application further includes:

[0047] A pixel definition layer is fabricated on one side of the substrate;

[0048] An isolation structure is fabricated on the side of the pixel definition layer that faces away from the substrate;

[0049] The graphical isolation structure forms a first isolation opening, a second isolation opening, and a third isolation opening;

[0050] A graphical pixel definition layer is formed, which creates a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening is connected to a first isolation opening, the second pixel opening is connected to a second isolation opening, and the third pixel opening is connected to a third isolation opening.

[0051] The pixel definition layer located on the periphery of the first light-emitting unit has a first minimum thickness, and the pixel definition layer located on the periphery of the second light-emitting unit has a second minimum thickness, wherein the first minimum thickness is not greater than the second minimum thickness.

[0052] In some embodiments, the light-emitting unit further includes a third light-emitting unit, and fabricating the light-emitting unit on one side of the substrate includes:

[0053] A third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within a third isolation opening;

[0054] A second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within a second isolation opening;

[0055] A first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within a first isolation opening;

[0056] The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness is not greater than the third minimum thickness.

[0057] In some embodiments, the light-emitting unit further includes a third light-emitting unit, and fabricating the light-emitting unit on one side of the substrate includes:

[0058] A third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within a third isolation opening;

[0059] A second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within a second isolation opening;

[0060] A first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within a first isolation opening;

[0061] Among them, the pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness, the second minimum thickness and the third minimum thickness are equal.

[0062] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0063] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the first difference is greater than the absolute value of the third difference.

[0064] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0065] Optionally, both the second upper electrode located above the third end and the second upper electrode located above the fourth end are connected to the isolation structure.

[0066] Optionally, the third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

[0067] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits light in one of blue and green light, and the third light-emitting unit emits light in the other of blue and green light.

[0068] In some embodiments, the light-emitting unit further includes a third light-emitting unit, and fabricating the light-emitting unit on one side of the substrate includes:

[0069] A third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within a third isolation opening;

[0070] A second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within a second isolation opening;

[0071] A first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within a first isolation opening;

[0072] The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, the first minimum thickness is less than the third minimum thickness, and the second minimum thickness is less than the third minimum thickness.

[0073] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0074] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is greater than the absolute value of the second difference.

[0075] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0076] Optionally, both the second upper electrode located above the third end and the second upper electrode located above the fourth end are connected to the isolation structure.

[0077] Optionally, the thickness of the third upper electrode located above the fifth end is greater than the thickness of the third upper electrode located above the sixth end, wherein the third upper electrode located above the fifth end overlaps with the isolation structure, and the third upper electrode located above the sixth end is spaced apart from the isolation structure.

[0078] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

[0079] In some embodiments, the light-emitting unit further includes a third light-emitting unit, and fabricating the light-emitting unit on one side of the substrate includes:

[0080] A third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within a third isolation opening;

[0081] A second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within a second isolation opening;

[0082] A first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within a first isolation opening;

[0083] The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, the first minimum thickness is less than the second minimum thickness, and the first minimum thickness is less than the third minimum thickness.

[0084] Optionally, the third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along the direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in a first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is less than the absolute value of the first difference and the absolute value of the third difference is less than the absolute value of the second difference.

[0085] Optionally, the thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

[0086] Optionally, the thickness of the second upper electrode located above the third end is greater than the thickness of the second upper electrode located above the fourth end, wherein the second upper electrode located above the third end overlaps with the isolation structure, and the second upper electrode located above the fourth end is spaced apart from the isolation structure.

[0087] Optionally, the third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

[0088] Optionally, the first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

[0089] Fourthly, this application provides a display device including the display panel of any of the above embodiments. The display device provided by this application has the same or similar technical effects as the display panel of any of the above embodiments, and will not be described again here. Attached Figure Description

[0090] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0091] Figure 1 This is a schematic diagram of the planar structure of the display panel provided in an embodiment of this application;

[0092] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0093] Figure 3 for Figure 2 One of the cross-sectional views along line BB;

[0094] Figure 4 This is one of the structural schematic diagrams of the display panel manufacturing process provided in the embodiments of this application;

[0095] Figure 5 This is the second structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0096] Figure 6 This is the third structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0097] Figure 7 This is the fourth structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0098] Figure 8 This is the fifth structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0099] Figure 9 This is the sixth structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0100] Figure 10 This is the seventh structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0101] Figure 11 This is the eighth schematic diagram of the structure during the manufacturing process of the display panel provided in the embodiments of this application;

[0102] Figure 12 This is the ninth structural schematic diagram of the display panel manufacturing process provided in the embodiments of this application;

[0103] Figure 13 for Figure 2 Second sectional view along line BB;

[0104] Figure 14 for Figure 2 Schematic diagram of the cross section along the BB line (Part 3);

[0105] Figure 15 for Figure 2 Fourth sectional view along line BB;

[0106] Figure 16 for Figure 2 Fifth sectional view along line BB;

[0107] Figure 17 This is one of the schematic flowcharts of the preparation method provided in the embodiments of this application;

[0108] Figure 18 A second schematic flowchart illustrating the preparation method provided in the embodiments of this application;

[0109] Figure 19 This is the third schematic flowchart of the preparation method provided in the embodiments of this application.

[0110] The following are the labeling elements in the figure:

[0111] 100 - Display panel; 200 - Evaporation equipment; 10 - Substrate; 20 - Pixel definition layer; 21 - Hole; 30 - Isolation structure; 301 - First isolation opening; 302 - Second isolation opening; 303 - Third isolation opening; 31 - First layer; 32 - Second layer; 33 - Third layer; 40 - First light-emitting unit; 41 - First light-emitting layer; 411 - First end; 412 - Second end; 42 - First upper electrode; 43 - First lower electrode; 50 - ... Two light-emitting units; 51-Second light-emitting layer; 511-Third end; 512-Fourth end; 52-Second upper electrode; 53-Second lower electrode; 60-Third light-emitting unit; 61-Third light-emitting layer; 611-Fifth end; 612-Sixth end; 62-Third upper electrode; 63-Third lower electrode; 70-First encapsulation layer; 71-First encapsulation part; 72-Second encapsulation part; 73-Third encapsulation part; 80-Second encapsulation layer; 90-Third encapsulation layer. Detailed Implementation

[0112] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0113] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0114] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0115] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0116] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This application provides a display panel including a substrate 10 and a pixel defined layer (PDL) and a lower electrode layer disposed on one side of the substrate 10 in the thickness direction. The lower electrode layer includes a plurality of spaced lower electrodes. The pixel defined layer 20 has pixel openings corresponding to the lower electrodes, with the pixel openings exposing a portion of the lower electrodes. The orthographic projection of the pixel openings onto the substrate 10 is located within the orthographic projection of the lower electrodes onto the substrate 10. The display panel also includes an isolation structure 30 disposed on the pixel defined layer 20 and a display function layer. The isolation structure 30 defines at least one isolation opening. The display function layer includes a plurality of light-emitting units, with portions of the light-emitting units located within the corresponding isolation openings. That is, the portions of the light-emitting units projected onto the substrate 10 are located within the orthographic projection of the corresponding isolation openings onto the substrate 10, and the orthographic projections of the light-emitting units onto the substrate 10 are located within the orthographic projections of the corresponding isolation openings onto the substrate 10. Each light-emitting unit includes a lower electrode, a light-emitting layer, and an upper electrode sequentially stacked along a direction away from the substrate 10.

[0117] The composition and preparation of the isolation structure 30 are detailed in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, and CN. Further descriptions are provided in CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A for reference.

[0118] The display panel also includes a driving circuit (not shown) disposed on the substrate 10. The driving circuit can be electrically connected to the lower electrode (e.g., anode) and upper electrode (e.g., cathode) of the light-emitting unit to make the light-emitting layer emit light.

[0119] For example, there are multiple light-emitting units, including a first light-emitting unit 40, a second light-emitting unit 50, and a third light-emitting unit 60. That is, some of the light-emitting units are the first light-emitting units 40, some are the second light-emitting units 50, and the remaining light-emitting units are the third light-emitting units 60. The first light-emitting unit 40 includes a first lower electrode 43, a first light-emitting layer 41, and a first upper electrode 42 sequentially stacked along the direction away from the substrate 10. The second light-emitting unit 50 includes a second lower electrode 53, a second light-emitting layer 51, and a second upper electrode 52 sequentially stacked along the direction away from the substrate 10. The third light-emitting unit 60 includes a third lower electrode 63, a third light-emitting layer 61, and a third upper electrode 62 sequentially stacked along the direction away from the substrate 10. That is, the light-emitting layer of the first light-emitting unit 40 is the first light-emitting layer 41, the light-emitting layer of the second light-emitting unit 50 is the second light-emitting layer 51, and the light-emitting layer of the third light-emitting unit 60 is the third light-emitting layer 61.

[0120] Among them, the first light-emitting layer 41, the second light-emitting layer 51, and the third light-emitting layer 61 can emit light of different colors.

[0121] For example, the first light-emitting layer 41 can emit red light, that is, the first light-emitting layer 41 corresponds to the R pixel, the second light-emitting layer 51 can emit green light, that is, the second light-emitting layer 51 corresponds to the G pixel, and the third light-emitting layer 61 can emit blue light, that is, the third light-emitting layer 61 corresponds to the B pixel.

[0122] For example, the plurality of isolation openings include a first isolation opening 301, a second isolation opening 302, and a third isolation opening 303. That is, a portion of the isolation openings is the first isolation opening 301, a portion is the second isolation opening 302, and the remaining portion is the third isolation opening 303.

[0123] Specifically, a portion of the first light-emitting unit 40 is located within the corresponding first isolation opening 301, that is, the portion of the first light-emitting unit 40 projected onto the substrate 10 is located within the projected portion of the corresponding first isolation opening 301 onto the substrate 10. A portion of the second light-emitting unit 50 is located within the corresponding second isolation opening 302, that is, the portion of the second light-emitting unit 50 projected onto the substrate 10 is located within the projected portion of the corresponding second isolation opening 302 onto the substrate 10. A portion of the third light-emitting unit 60 is located within the corresponding third isolation opening 303, that is, the portion of the third light-emitting unit 60 projected onto the substrate 10 is located within the projected portion of the corresponding third isolation opening 303 onto the substrate 10.

[0124] The display panel also includes a first encapsulation layer 70, which is disposed on the side of the display functional layer away from the substrate 10. The first encapsulation layer 70 includes a first encapsulation portion 71, a second encapsulation portion 72, and a third encapsulation portion 73, wherein the first encapsulation portion 71 covers the first light-emitting unit 40, the second encapsulation portion 72 covers the second light-emitting unit 50, and the third encapsulation portion 73 covers the third light-emitting unit.

[0125] In some embodiments, during the manufacturing of the display panel, the first light-emitting unit 40, the second light-emitting unit 50, and the third light-emitting unit 60 are sequentially formed. The first encapsulation portion 71, the second encapsulation portion 72, and the third encapsulation portion 73 are also sequentially formed.

[0126] Of course, in other embodiments, during the manufacturing of the display panel, the third light-emitting unit 60, the second light-emitting unit 50, and the first light-emitting unit 40 are sequentially formed. The third encapsulation part 73, the second encapsulation part 72, and the first encapsulation part 71 are also sequentially formed.

[0127] The manufacturing process of the display panel in some embodiments is described below.

[0128] Please refer to the following: Figure 4 and Figure 5A first light-emitting material and a cathode material are deposited on a substrate 10 having an isolation structure 30. Then, a chemical vapor deposition (CVD) encapsulation material is applied. The substrate 10 is then etched to remove the portions of the first light-emitting material and cathode material outside the first isolation opening, and to remove the portions of the encapsulation material outside the first encapsulation area, thereby obtaining a first light-emitting unit 40 and a portion of the first encapsulation layer 70 that encapsulates the first light-emitting unit 40 (first encapsulation portion 71).

[0129] Please refer to the following: Figure 6 and Figure 7 A second light-emitting material, a cathode material, and an encapsulation material are deposited on a substrate 10. The substrate 10 is then etched to remove the portions of the second light-emitting material and cathode material outside the second opening, and to remove the portions of the encapsulation material outside the second encapsulation area, thereby obtaining a second light-emitting unit 50 and a portion of the second light-emitting unit 50 encapsulated by a first encapsulation layer 70 (second encapsulation portion 72).

[0130] Please refer to the following: Figure 3 and Figure 8 A third light-emitting material, a cathode material, and an encapsulation material are deposited on a substrate 10. The substrate 10 is then etched to remove the portions of the third light-emitting material and cathode material outside the third opening, and to remove the portions of the encapsulation material outside the third encapsulation area, thereby obtaining a third light-emitting unit 60 and a portion of the third light-emitting unit 60 encapsulated by a first encapsulation layer 70 (third encapsulation portion 73).

[0131] Please see Figure 9 The substrate 10 is inkjet printed with inkjet printing (DAM, IJP) to obtain a second encapsulation layer 80, which covers the first encapsulation layer 70 and fills the recesses. Then, a chemical vapor deposition (CVD) encapsulation material is applied to the side of the second encapsulation layer 80 opposite to the substrate 10 to obtain a third encapsulation layer 90, which covers the second encapsulation layer 80. It is understood that the materials of the first encapsulation layer 70 and the third encapsulation layer 90 may include inorganic materials, and the material of the second encapsulation layer 80 may include organic materials.

[0132] The inventor discovered that, in related technologies, please refer to [the relevant literature / research]. Figures 3 to 9 When both ends of the upper electrode overlap with the isolation structure 30, in other words, when the entire perimeter of the upper electrode overlaps with the isolation structure 30, the upper electrode undergoes bilateral vapor deposition, resulting in a poor overlap effect between the upper electrode and the isolation structure 30.

[0133] To improve the overlapping effect, the inventor discovered, please refer to the following: Figure 10 and Figure 11When preparing the upper electrode, a single-sided vapor deposition method can be used, i.e., single-sided vapor deposition can be employed, and the deposition time can be extended or the number of depositions increased. The total deposition time of the upper electrode remains almost unchanged, but the overlap effect between the upper electrode and the isolation structure 30 can be improved. It can be understood that, compared with single-sided vapor deposition, double-sided vapor deposition involves the vapor deposition equipment 200 performing two depositions in two opposite directions.

[0134] However, please refer to the following: Figure 12 and Figure 13 After single-sided evaporation, one end of the upper electrode overlaps with the isolation structure 30, and the other end is spaced apart from the isolation structure 30, exposing the pixel definition layer 20. When preparing a light-emitting unit in an isolation opening, it is necessary to remove the upper electrode and light-emitting layer of the light-emitting unit in other isolation openings (e.g., through etching process), which can easily damage the exposed pixel definition layer 20, and thus easily generate holes 21 in the exposed pixel definition layer 20, and may even damage the lower electrode, affecting reliability and light-emitting effect.

[0135] For example, when fabricating the first light-emitting unit 40, it is necessary to remove the first light-emitting layer 41 and the upper electrode of the first light-emitting unit 40 in the second isolation opening 302 and the third isolation opening 303, which may easily damage the pixel definition layer 20 in the second isolation opening 302 and the third isolation opening 303.

[0136] For example, when fabricating the second light-emitting unit 50, it is necessary to remove the second light-emitting layer 51 and the upper electrode of the second light-emitting unit 50 in the first isolation opening 301 and the third isolation opening 303. At this time, the first light-emitting unit 40 and the first encapsulation part 71 are already in the first isolation opening 301, which may easily damage the part of the pixel definition layer 20 in the third isolation opening 303.

[0137] For example, when fabricating the third light-emitting unit 60, it is necessary to remove the third light-emitting layer 61 and the upper electrode of the third light-emitting unit 60 in the first isolation opening 301 and the second isolation opening 302. At this time, the first light-emitting unit 40 and the first encapsulation part 71 are already in the first isolation opening 301, and the second light-emitting unit 50 and the second encapsulation part 72 are already in the second isolation opening 302. This will not damage the part of the pixel definition layer 20 in the first isolation opening 301 and the second isolation opening 302.

[0138] It is understandable that the isolation structure 30 acts as a mask when fabricating the display functional layer. Of course, in some embodiments, the display panel 100 can also directly use a mask to fabricate the display functional layer.

[0139] Therefore, when the display panel provided in this application embodiment is subjected to single-sided vapor deposition during the fabrication of the light-emitting unit, the pixel definition layer 20 in the third isolation opening 303 is damaged twice, which easily produces holes 21.

[0140] To resolve the above technical issues, please refer to the following: Figure 14 , Figure 15 and Figure 16 The present application will now provide a further description of a display panel provided in an embodiment.

[0141] In the display panel of this application embodiment, the first light-emitting layer 41 includes a first end 411 and a second end 412 opposite to the first end 411 in a first direction, and the second light-emitting layer 51 includes a third end 511 and a fourth end 512 opposite to the third end 511 in a first direction. The thickness of the first upper electrode 42 located above the first end 411 has a first difference with the thickness of the first upper electrode 42 located above the second end 412, and the thickness of the second upper electrode 52 located above the third end 511 has a second difference with the thickness of the second upper electrode 52 located above the fourth end 512. The absolute value of the first difference is not less than the absolute value of the second difference.

[0142] Optionally, the first direction is parallel to the substrate. Optionally, the first direction is parallel to the evaporation direction of the evaporation equipment 200. It can be understood that the evaporation direction of the evaporation equipment 200 can be the direction in which the evaporation equipment 200 or the display panel 100 moves when the display functional layer is evaporated onto the display panel 100.

[0143] Optionally, the first difference is not equal to 0. Optionally, the first difference is less than the maximum thickness of the first upper electrode 42.

[0144] In this way, the thickness of the first upper electrode 42 of the first light-emitting unit 40 at its two ends in the first direction can be inconsistent. That is, the thickness of one end of the first upper electrode 42 of the first light-emitting unit 40 in the first direction can be greater than 0 but less than the thickness of the other end. This one end of the first upper electrode 42 in the first direction can, to a certain extent, protect the underlying film layer, which is beneficial to improving reliability.

[0145] It is understandable that the thickness of the first light-emitting unit 40 can be changed along the first direction during bilateral vapor deposition. For example, the thickness of the first upper electrode 42 above the first end 411 of the first light-emitting layer 41 can be greater than the thickness of the first upper electrode 42 above the second end 412, and the thickness of the first upper electrode 42 above the second end 412 is greater than 0.

[0146] Similarly, the thickness of the second upper electrode 52 of the second light-emitting unit 50 at its two ends in the first direction can be inconsistent. That is, the thickness of one end of the second upper electrode 52 of the second light-emitting unit 50 in the first direction can be greater than 0 but less than the thickness of the other end. This one end of the second upper electrode 52 in the first direction can, to some extent, protect the underlying film layer, which is beneficial to improving reliability.

[0147] Therefore, the display panel provided in this application embodiment can improve the performance / process performance of the display device.

[0148] In some embodiments, the display panel 100 provided in this application further includes a pixel definition layer 20 and an isolation structure 30. That is, the display panel provided in this application can utilize the isolation structure 30 to function as a photomask.

[0149] As described above, the thickness of the first upper electrode 42 above the first end 411 of the first light-emitting layer 41 can be greater than the thickness of the first upper electrode 42 above the second end 412, and the thickness of the first upper electrode 42 above the second end 412 is greater than 0. The overlap effect between the first upper electrode 42 above the first end 411 of the first light-emitting layer 41 and the isolation structure 30 can be improved, and the second end 412 may not expose the pixel definition layer 20.

[0150] Of course, in some embodiments, the thickness of the first upper electrode 42 above the second end 412 of the first light-emitting layer 41 can be equal to 0, that is, the second end 412 can expose the pixel definition layer 20.

[0151] Optionally, a pixel definition layer 20 is disposed on one side of the substrate 10. The pixel definition layer 20 includes a first pixel opening and a second pixel opening. An isolation structure 30 is disposed on the side of the pixel definition layer 20 facing away from the substrate 10. The first isolation opening 301 is connected to the first pixel opening, and the second isolation opening 302 is connected to the second pixel opening. The pixel definition layer 20 located around the first light-emitting unit 40 has a first minimum thickness, and the pixel definition layer 20 located around the second light-emitting unit 50 has a second minimum thickness. The first minimum thickness is not greater than the second minimum thickness.

[0152] It is understandable that the first light-emitting unit 40 can be fabricated after the second light-emitting unit 50. Since the second light-emitting unit 50 can protect the pixel definition layer 20, although the first upper electrode 42 above the second end 412 of the first light-emitting layer 41 provides weaker protection to the pixel definition layer 20, the pixel definition layer 20 located around the first light-emitting unit 40 will not be damaged by the etching process used to fabricate the second light-emitting unit 50.

[0153] Furthermore, since the second end 412 is relatively thin and does not expose the pixel definition layer 20, the display panel 100 provided in this application embodiment can also provide a certain degree of protection for the pixel definition layer 20, which is beneficial to improving reliability.

[0154] In some embodiments, the plurality of light-emitting units further include a third light-emitting unit 60, and the pixel definition layer 20 further includes a third pixel opening. The pixel definition layer 20 located around the third light-emitting unit 60 has a third minimum thickness, and the first minimum thickness is not greater than the third minimum thickness.

[0155] It is understandable that the first light-emitting unit 40 can be fabricated after the third light-emitting unit 60. Since the third light-emitting unit 60 can protect the pixel definition layer 20, although the first upper electrode 42 above the second end 412 of the first light-emitting layer 41 provides relatively weak protection for the pixel definition layer 20, the pixel definition layer 20 located around the first light-emitting unit 40 will not be damaged by the etching process used to fabricate the third light-emitting unit 60.

[0156] It is understandable that the first light-emitting unit 40 is fabricated last and will not damage the pixel definition layer 20 surrounding the second light-emitting unit 50 and the third light-emitting unit 60. Furthermore, the fabrication of the first light-emitting unit 40, the second light-emitting unit 50, and the third light-emitting unit 60 will not damage the pixel definition layer 20 surrounding them.

[0157] Please see Figure 14 In some embodiments, the first minimum thickness, the second minimum thickness, and the third minimum thickness are equal. It is understood that the pixel definition layer 20 around the first light-emitting unit 40, the pixel definition layer 20 around the second light-emitting unit 50, and the pixel definition layer 20 around the third light-emitting unit 60 are damaged to the same degree, so the first minimum thickness, the second minimum thickness, and the third minimum thickness can be equal.

[0158] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0159] Optionally, the third light-emitting unit 60 includes a third light-emitting layer 61 and a third upper electrode 62 sequentially stacked along a direction away from the substrate 10. The third light-emitting layer 61 includes a fifth end 611 and a sixth end 612 opposite to the fifth end 611 in a first direction. The thickness of the third upper electrode 62 located above the fifth end 611 and the thickness of the third upper electrode 62 located above the sixth end 612 have a third difference, wherein the absolute value of the first difference is greater than the absolute value of the third difference.

[0160] It is understandable that the first light-emitting unit 40 can be fabricated after the second light-emitting unit 50 and the third light-emitting unit 60. When the third light-emitting unit 60 is fabricated, its third upper electrode 62 can protect the pixel definition layer 20 surrounding the first and second light-emitting units 40 and 50, preventing damage to the pixel definition layer 20. Similarly, when the second light-emitting unit 50 is fabricated, its second upper electrode 52 can protect the pixel definition layer 20 surrounding the first light-emitting unit 40, preventing damage to the pixel definition layer 20. Therefore, the pixel definition layers 20 surrounding the first, second, and third light-emitting units 40 are all undamaged, and their first, second, and third minimum thicknesses are equal.

[0161] Optionally, the thickness of the first upper electrode 42 located above the first end 411 is greater than the thickness of the first upper electrode 42 located above the second end 412, wherein the first upper electrode 42 located above the first end 411 overlaps with the isolation structure 30, and the first upper electrode 42 located above the second end 412 is spaced apart from the isolation structure 30.

[0162] Optionally, the second upper electrode 52 located above the third end 511 and the second upper electrode 52 located above the fourth end 512 are both connected to the isolation structure 30.

[0163] Optionally, the third upper electrode 62 located above the fifth end 611 and the third upper electrode 62 located above the sixth end 612 are both connected to the isolation structure 30.

[0164] Optionally, the second light-emitting unit 50 and the third light-emitting unit 60 can both be double-sided vapor deposition, while the first light-emitting unit 40 is single-sided vapor deposition.

[0165] Optionally, the portion of the first light-emitting layer 41 projected onto the substrate 10 is located outside the projection of the first upper electrode 42 onto the substrate 10, the projection of the second light-emitting layer 51 onto the substrate 10 is located within the projection of the second upper electrode 52 onto the substrate 10, and the projection of the third light-emitting layer 61 onto the substrate 10 is located within the projection of the third upper electrode 62 onto the substrate 10.

[0166] Optionally, the first light-emitting unit 40 emits red light, the second light-emitting unit 50 emits light in one of blue and green, and the third light-emitting unit 60 emits light in the other of blue and green. For example, the second light-emitting unit 50 emits green light, and the third light-emitting unit 60 emits blue light.

[0167] Please see Figure 15In some embodiments, the first minimum thickness is less than the third minimum thickness, and the second minimum thickness is less than the third minimum thickness. It is understood that the degree of damage to the pixel definition layer 20 surrounding the first light-emitting unit 40 and the pixel definition layer 20 surrounding the second light-emitting unit 50 is less than the degree of damage to the pixel definition layer 20 surrounding the third light-emitting unit 60, thus allowing the first minimum thickness and the second minimum thickness to be less than the third minimum thickness.

[0168] For example, the first minimum thickness can be equal to the second minimum thickness. That is, the pixel definition layer 20 around the first light-emitting unit 40 and the pixel definition layer 20 around the second light-emitting unit 50 are damaged to the same degree.

[0169] Optionally, the absolute value of the first difference is greater than the absolute value of the second difference.

[0170] Optionally, the third light-emitting unit 60 includes a third light-emitting layer 61 and a third upper electrode 62 sequentially stacked along a direction away from the substrate 10. The third light-emitting layer 61 includes a fifth end 611 and a sixth end 612 opposite to the fifth end 611 in a first direction. The thickness of the third upper electrode 62 located above the fifth end 611 and the thickness of the third upper electrode 62 located above the sixth end 612 have a third difference, wherein the absolute value of the third difference is greater than the absolute value of the second difference.

[0171] It is understandable that the first light-emitting unit 40 can be fabricated after the second light-emitting unit 50, and the second light-emitting unit 50 can be fabricated after the third light-emitting unit 60. When fabricating the third light-emitting unit 60, the pixel definition layer 20 surrounding it will not be damaged. The third upper electrode 62 of the third light-emitting unit 60 cannot protect the pixel definition layer 20 surrounding the first light-emitting unit 40 and the second light-emitting unit 50; therefore, when fabricating the third light-emitting unit 60, the pixel definition layer 20 surrounding the first light-emitting unit 40 and the second light-emitting unit 50 will be damaged. Therefore, the first minimum thickness and the second minimum thickness are less than the third minimum thickness.

[0172] Optionally, the thickness of the first upper electrode 42 located above the first end 411 is greater than the thickness of the first upper electrode 42 located above the second end 412, wherein the first upper electrode 42 located above the first end 411 overlaps with the isolation structure 30, and the first upper electrode 42 located above the second end 412 is spaced apart from the isolation structure 30.

[0173] Optionally, the second upper electrode 52 located above the third end 511 and the second upper electrode 52 located above the fourth end 512 are both connected to the isolation structure 30.

[0174] Optionally, the thickness of the third upper electrode 62 located above the fifth end 611 is greater than the thickness of the third upper electrode 62 located above the sixth end 612, wherein the third upper electrode 62 located above the fifth end 611 overlaps with the isolation structure 30, and the third upper electrode 62 located above the sixth end 612 is spaced apart from the isolation structure 30.

[0175] Optionally, the third light-emitting unit 60 can be deposited by single-sided vapor deposition, the second light-emitting unit 50 can be deposited by double-sided vapor deposition, and the first light-emitting unit 40 can be deposited by single-sided vapor deposition.

[0176] Optionally, the portion of the first light-emitting layer 41 projected onto the substrate 10 is located outside the projection of the first upper electrode 42 onto the substrate 10, the portion of the second light-emitting layer 51 projected onto the substrate 10 is located within the projection of the second upper electrode 52 onto the substrate 10, and the portion of the third light-emitting layer 61 projected onto the substrate 10 is located outside the projection of the third upper electrode 62 onto the substrate 10.

[0177] Optionally, the first light-emitting unit 40 emits red light, the second light-emitting unit 50 emits light in one of blue and green, and the third light-emitting unit 60 emits light in the other of blue and green. For example, the second light-emitting unit 50 emits green light, and the third light-emitting unit 60 emits blue light.

[0178] In some embodiments, the first minimum thickness is less than the second minimum thickness, and the first minimum thickness is less than the third minimum thickness. It is understood that the degree of damage to the pixel definition layer 20 around the first light-emitting unit 40 is less than the degree of damage to the pixel definition layer 20 around the second light-emitting unit 50 and the pixel definition layer 20 around the third light-emitting unit 60, which allows the first minimum thickness to be less than the second minimum thickness and the third minimum thickness.

[0179] Optionally, the second minimum thickness is equal to the third minimum thickness. That is, the pixel definition layer 20 around the second light-emitting unit 50 and the pixel definition layer 20 around the third light-emitting unit 60 are damaged to the same degree.

[0180] Optionally, the third light-emitting unit 60 includes a third light-emitting layer 61 and a third upper electrode 62 sequentially stacked along a direction away from the substrate 10. The third light-emitting layer 61 includes a fifth end 611 and a sixth end 612 opposite to the fifth end 611 in a first direction. The thickness of the third upper electrode 62 located above the fifth end 611 and the thickness of the third upper electrode 62 located above the sixth end 612 have a third difference, wherein the absolute value of the third difference is less than the absolute value of the first difference and the absolute value of the third difference is less than the absolute value of the second difference.

[0181] It is understandable that the first light-emitting unit 40 can be fabricated after the second light-emitting unit 50, and the second light-emitting unit 50 can be fabricated after the third light-emitting unit 60. The third upper electrode 62 of the third light-emitting unit 60 can protect the pixel definition layer 20 around the third light-emitting unit 60, and can also protect the pixel definition layer 20 around the second light-emitting unit 50, so that the pixel definition layer 20 around both the second light-emitting unit 50 and the third light-emitting unit 60 is not damaged. The second upper electrode 52 of the second light-emitting unit 50 cannot protect the pixel definition layer 20 around the first light-emitting unit 40, and the first light-emitting unit 40 cannot protect the pixel definition layer 20 around itself either, so the first minimum thickness is less than the second minimum thickness and the third minimum thickness.

[0182] Optionally, the thickness of the first upper electrode 42 located above the first end 411 is greater than the thickness of the first upper electrode 42 located above the second end 412, wherein the first upper electrode 42 located above the first end 411 overlaps with the isolation structure 30, and the first upper electrode 42 located above the second end 412 is spaced apart from the isolation structure 30.

[0183] Optionally, the thickness of the second upper electrode 52 located above the third end 511 is greater than the thickness of the second upper electrode 52 located above the fourth end 512, wherein the second upper electrode 52 located above the third end 511 overlaps with the isolation structure 30, and the second upper electrode 52 located above the fourth end 512 is spaced apart from the isolation structure 30.

[0184] Optionally, the third upper electrode 62 located above the fifth end 611 and the third upper electrode 62 located above the sixth end 612 are both connected to the isolation structure 30.

[0185] Optionally, the third light-emitting unit 60 may be double-sided vapor deposition, the second light-emitting unit 50 may be single-sided vapor deposition, and the first light-emitting unit 40 may be single-sided vapor deposition.

[0186] Optionally, the portion of the first light-emitting layer 41 projected onto the substrate 10 is located outside the projection of the first upper electrode 42 onto the substrate 10, the portion of the second light-emitting layer 51 projected onto the substrate 10 is located outside the projection of the second upper electrode 52 onto the substrate 10, and the projection of the third light-emitting layer 61 onto the substrate 10 is located within the projection of the third upper electrode 62 onto the substrate 10.

[0187] Optionally, the first light-emitting unit 40 emits red light, the second light-emitting unit 50 emits light in one of blue and green, and the third light-emitting unit 60 emits light in the other of blue and green. For example, the second light-emitting unit 50 emits green light, and the third light-emitting unit 60 emits blue light.

[0188] Please refer to the following: Figure 14 , Figure 15 ,and Figure 16 In some embodiments, the isolation structure 30 includes a first layer 31, a second layer 32 and a third layer 33 stacked sequentially along the direction away from the substrate 10. The orthographic projection of the second layer 32 onto the substrate 10 is located within the orthographic projection of the first layer 31 onto the substrate 10. The orthographic projection of the surface of the second layer 32 near the third layer 33 onto the substrate 10 is located within the orthographic projection of the third layer 33 onto the substrate 10.

[0189] Optionally, the area of ​​the second layer 32 projected onto the substrate 10 is smaller than the area of ​​the first layer 31 projected onto the substrate 10, and the area of ​​the surface of the second layer 32 near the third layer 33 projected onto the substrate 10 is smaller than the area of ​​the third layer 33 projected onto the substrate 10.

[0190] Understandably, the material of the first layer 31 can be molybdenum (Mo), the material of the second layer 32 can be aluminum (Al), and the material of the third layer 33 can be titanium (Ti). Compared to molybdenum and titanium, aluminum is easier to etch; therefore, the area of ​​the second layer 32 projected onto the substrate 10 is the smallest.

[0191] In some embodiments, the first light-emitting unit 40 further includes a first lower electrode 43 located on the side of the first light-emitting layer 41 facing the substrate 10. A portion of the first lower electrode 43 is located between the substrate 10 and the pixel definition layer 20, and another portion is exposed from the first pixel opening. Therefore, the first light-emitting layer 41 can be connected to the first lower electrode 43.

[0192] Optionally, the second light-emitting unit 50 further includes a second lower electrode 53 located on the side of the second light-emitting layer 51 facing the substrate 10. A portion of the second lower electrode 53 is located between the substrate 10 and the pixel definition layer 20, and another portion is exposed from the second pixel opening. Therefore, the second light-emitting layer 51 can be connected to the second lower electrode 53.

[0193] Optionally, the third light-emitting unit 60 further includes a third lower electrode 63 located on the side of the third light-emitting layer 61 facing the substrate 10. A portion of the third lower electrode 63 is located between the substrate 10 and the pixel definition layer 20, and another portion is exposed from the third pixel opening. Therefore, the third light-emitting layer 61 can be connected to the third lower electrode 63.

[0194] Please refer to the following: Figure 14 , Figure 15 ,and Figure 16 The display panel 100 provided in this application embodiment further includes a first encapsulation layer 70, which is located on the side of the light-emitting unit away from the substrate 10. The orthogonal projection of the light-emitting unit on the substrate 10 is located within the orthogonal projection range of the first encapsulation layer 70 on the substrate 10.

[0195] Optionally, the material of the first encapsulation layer 70 includes inorganic materials.

[0196] Optionally, the material of the first encapsulation layer 70 includes one of silicon oxide and silicon nitride.

[0197] Optionally, the first encapsulation layer 70 includes a first encapsulation portion 71, a second encapsulation portion 72, and a third encapsulation portion 73. The orthographic projection of the first light-emitting unit 40 onto the substrate 10 is located within the orthographic projection range of the first encapsulation portion onto the substrate 10. The orthographic projection of the second light-emitting unit 50 onto the substrate 10 is located within the orthographic projection range of the second encapsulation portion onto the substrate 10.

[0198] Alternatively, please continue reading Figure 9 In some embodiments, the display panel 100 provided in this application may further include a second encapsulation layer 80 and a third encapsulation layer 90, wherein the second encapsulation layer 80 is located on the side of the first encapsulation layer 70 away from the substrate 10, and the third encapsulation layer 90 is located on the side of the second encapsulation layer 80 away from the substrate 10.

[0199] Alternatively, the first encapsulation layer 70 may be an inorganic encapsulation layer formed by chemical vapor deposition (CVD) and patterning.

[0200] Alternatively, the second encapsulation layer 80 can be made by inkjet printing (IJP).

[0201] Alternatively, the third encapsulation layer 90 may be an inorganic encapsulation layer formed by chemical vapor deposition (CVD).

[0202] Optionally, the display panel 100 provided in this application may also include other film layers, which are located on the side of the third encapsulation layer 90 opposite to the substrate 10. These other film layers may include polarizing films, optically clear adhesive (OCA), etc.

[0203] Please see Figure 17 In some embodiments, this application also provides a method for manufacturing a display panel 100, the method comprising:

[0204] S1 provides a substrate 10.

[0205] S2, Light-emitting units are prepared on one side of substrate 10. There are multiple light-emitting units, including a first light-emitting unit 40 and a second light-emitting unit 50. The first light-emitting unit 40 includes a first light-emitting layer 41 and a first upper electrode 42 stacked sequentially in a direction away from substrate 10. The first light-emitting layer 41 includes a first end 411 and a second end 412 opposite to the first end 411 in a first direction. The second light-emitting unit 50 includes a second light-emitting layer 51 and a second upper electrode 52 stacked sequentially in a direction away from substrate 10. The second light-emitting layer 51 includes a third end 511 and a fourth end 512 opposite to the third end 511 in a first direction.

[0206] The thickness of the first upper electrode 42 located above the first end 411 has a first difference with the thickness of the first upper electrode 42 located above the second end 412, and the thickness of the second upper electrode 52 located above the third end 511 has a second difference with the thickness of the second upper electrode 52 located above the fourth end 512. The absolute value of the first difference is not less than the absolute value of the second difference.

[0207] Optionally, the first difference is not equal to 0.

[0208] In this way, the display panel 100 prepared by the preparation method of this application embodiment can protect the pixel definition layer 20 to a certain extent.

[0209] Please see Figure 18 In some embodiments, this application also provides a method for manufacturing a display panel 100, the method comprising:

[0210] S1 provides a substrate 10.

[0211] S2, a pixel definition layer 20 is prepared on one side of the substrate 10.

[0212] S3, an isolation structure 30 is prepared on the side of the pixel definition layer 20 away from the substrate 10.

[0213] S4, the graphical isolation structure 30 forms a first isolation opening 301, a second isolation opening 302 and a third isolation opening 303.

[0214] S5, the graphical pixel definition layer 20 forms a first pixel opening, a second pixel opening and a third pixel opening. The first pixel opening is connected to the first isolation opening 301, the second pixel opening is connected to the second isolation opening 302, and the third pixel opening is connected to the third isolation opening 303.

[0215] S6, Light-emitting units are prepared on one side of substrate 10. There are multiple light-emitting units, including a first light-emitting unit 40 and a second light-emitting unit 50. The first light-emitting unit 40 includes a first light-emitting layer 41 and a first upper electrode 42 stacked sequentially in a direction away from substrate 10. The first light-emitting layer 41 includes a first end 411 and a second end 412 opposite to the first end 411 in a first direction. The second light-emitting unit 50 includes a second light-emitting layer 51 and a second upper electrode 52 stacked sequentially in a direction away from substrate 10. The second light-emitting layer 51 includes a third end 511 and a fourth end 512 opposite to the third end 511 in a first direction.

[0216] Optionally, the thickness of the first upper electrode 42 located above the first end 411 has a first difference with the thickness of the first upper electrode 42 located above the second end 412, and the thickness of the second upper electrode 52 located above the third end 511 has a second difference with the thickness of the second upper electrode 52 located above the fourth end 512, wherein the absolute value of the first difference is not less than the absolute value of the second difference.

[0217] Optionally, the first difference is not equal to 0.

[0218] Optionally, the pixel definition layer 20 located around the first light-emitting unit 40 has a first minimum thickness, and the pixel definition layer 20 located around the second light-emitting unit 50 has a second minimum thickness, wherein the first minimum thickness is not greater than the second minimum thickness.

[0219] Optionally, the light-emitting unit further includes a third light-emitting unit 60, and the pixel definition layer 20 located around the third light-emitting unit 60 has a third minimum thickness, wherein the first minimum thickness is not greater than the third minimum thickness.

[0220] Please see Figure 19 In some embodiments, in step S6, fabricating a light-emitting unit on one side of the substrate 10 includes:

[0221] S61, Prepare a third light-emitting unit 60, with a portion of the third light-emitting unit 60 disposed within the third isolation opening 303;

[0222] S62, prepare a second light-emitting unit 50, and a portion of the second light-emitting unit 50 is disposed within the second isolation opening 302;

[0223] S63, Prepare a first light-emitting unit 40, and a portion of the first light-emitting unit 40 is disposed within the first isolation opening 301.

[0224] Optionally, the first light-emitting unit 40 emits red light, the second light-emitting unit 50 emits light in one of blue and green, and the third light-emitting unit 60 emits light in the other of blue and green. For example, the second light-emitting unit 50 emits green light, and the third light-emitting unit 60 emits blue light.

[0225] It is understood that the manufacturing method provided in this application can produce the display panel 100 of any of the above embodiments. Optionally, the manufacturing method provided in this application can produce the display panel 100 as described above. Figure 14 , Figure 15 as well as Figure 16 Any of the display panels 100 shown.

[0226] This application also provides a display device, which can be a mobile phone, television, tablet computer, laptop computer, desktop computer, vehicle display terminal, wearable device, advertising display device, etc. Optionally, the display device provided in this application includes the display panel 100 of any of the above embodiments. The display device provided in this application has the same or similar technical effects as the display panel 100 of any of the above embodiments, and will not be described again here.

[0227] The above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized by, include: substrate; Multiple light-emitting units are disposed on one side of the substrate, including a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a first light-emitting layer and a first upper electrode stacked sequentially in a direction away from the substrate. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. The second light-emitting unit includes a second light-emitting layer and a second upper electrode stacked sequentially in a direction away from the substrate. The second light-emitting layer includes a third end and a fourth end opposite to the third end in the first direction. A pixel definition layer is disposed on one side of the substrate, including a first pixel opening and a second pixel opening; An isolation structure is disposed on the side of the pixel definition layer opposite to the substrate, including a first isolation opening and a second isolation opening. The first isolation opening is connected to the first pixel opening, and the second isolation opening is connected to the second pixel opening. A portion of the first light-emitting unit is disposed in the first isolation opening, and a portion of the second light-emitting unit is disposed in the second isolation opening. Wherein, the thickness of the first upper electrode located above the first end has a first difference with the thickness of the first upper electrode located above the second end, and the thickness of the second upper electrode located above the third end has a second difference with the thickness of the second upper electrode located above the fourth end, the absolute value of the first difference is greater than the absolute value of the second difference, and the first difference is not equal to 0. The pixel definition layer located on the periphery of the first light-emitting unit has a first minimum thickness, and the pixel definition layer located on the periphery of the second light-emitting unit has a second minimum thickness, wherein the first minimum thickness is less than the second minimum thickness.

2. The display panel of claim 1, wherein, The plurality of light-emitting units further includes a third light-emitting unit, the pixel definition layer further includes a third pixel opening, the isolation structure further includes a third isolation opening, the third isolation opening and the third pixel opening are connected, and a portion of the third light-emitting unit is disposed within the third isolation opening, wherein: The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness is not greater than the third minimum thickness.

3. The display panel of claim 2, wherein, The second minimum thickness and the third minimum thickness are equal.

4. The display panel of claim 3, wherein, The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially in a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the first difference is greater than the absolute value of the third difference.

5. The display panel of claim 3, wherein, The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

6. The display panel of claim 3, wherein, The second upper electrode located above the third end and the second upper electrode located above the fourth end are both connected to the isolation structure.

7. The display panel of claim 4, wherein, The third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

8. The display panel of claim 3, wherein, The first light-emitting unit emits red light, the second light-emitting unit emits light in either blue or green, and the third light-emitting unit emits light in either blue or green.

9. The display panel of claim 2, wherein, The first minimum thickness is less than the third minimum thickness, and the second minimum thickness is less than the third minimum thickness.

10. The display panel of claim 9, wherein, The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially in a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is greater than the absolute value of the second difference.

11. The display panel of claim 9, wherein, The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

12. The display panel of claim 9, wherein, The second upper electrode located above the third end and the second upper electrode located above the fourth end are both connected to the isolation structure.

13. The display panel of claim 10, wherein, The thickness of the third upper electrode located above the fifth end is greater than the thickness of the third upper electrode located above the sixth end, wherein the third upper electrode located above the fifth end overlaps with the isolation structure, and the third upper electrode located above the sixth end is spaced apart from the isolation structure.

14. The display panel of claim 9, wherein, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

15. The display panel of claim 2, wherein, The first minimum thickness is less than the third minimum thickness.

16. The display panel of claim 15, wherein, The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is less than the absolute value of the first difference and the absolute value of the third difference is less than the absolute value of the second difference.

17. The display panel of claim 15, wherein, The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

18. The display panel of claim 15, wherein, The thickness of the second upper electrode located above the third end is greater than the thickness of the second upper electrode located above the fourth end, wherein the second upper electrode located above the third end overlaps with the isolation structure, and the second upper electrode located above the fourth end is spaced apart from the isolation structure.

19. The display panel of claim 16, wherein, The third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

20. The display panel of claim 15, wherein, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

21. The display panel of claim 4, wherein, The portion of the first light-emitting layer projected onto the substrate is located outside the projection of the first upper electrode onto the substrate; the portion of the second light-emitting layer projected onto the substrate is located within the projection of the second upper electrode onto the substrate; and the portion of the third light-emitting layer projected onto the substrate is located within the projection of the third upper electrode onto the substrate.

22. The display panel of claim 10, wherein, The portion of the first light-emitting layer projected onto the substrate is located outside the projection of the first upper electrode onto the substrate; the portion of the second light-emitting layer projected onto the substrate is located within the projection of the second upper electrode onto the substrate; and the portion of the third light-emitting layer projected onto the substrate is located outside the projection of the third upper electrode onto the substrate.

23. The display panel of claim 16, wherein, The portion of the first light-emitting layer projected onto the substrate is located outside the projection of the first upper electrode onto the substrate; the portion of the second light-emitting layer projected onto the substrate is located outside the projection of the second upper electrode onto the substrate; and the projection of the third light-emitting layer onto the substrate is located within the projection of the third upper electrode onto the substrate.

24. The display panel of claim 1, wherein, The isolation structure includes a first layer, a second layer, and a third layer stacked sequentially in a direction away from the substrate. The orthographic projection of the second layer onto the substrate is within the orthographic projection of the first layer onto the substrate. The surface of the second layer near the third layer onto the substrate is within the orthographic projection of the third layer onto the substrate.

25. The display panel of claim 24, wherein, The area of ​​the second layer projected onto the substrate is smaller than the area of ​​the first layer projected onto the substrate, and the area of ​​the second layer surface near the third layer projected onto the substrate is smaller than the area of ​​the third layer projected onto the substrate.

26. The display panel as claimed in claim 2, characterized in that, The first light-emitting unit further includes a first lower electrode located on the side of the first light-emitting layer facing the substrate, a portion of the first lower electrode being located between the substrate and the pixel definition layer, and another portion being exposed from the first pixel opening; The second light-emitting unit further includes a second lower electrode located on the side of the second light-emitting layer facing the substrate, a portion of the second lower electrode being located between the substrate and the pixel definition layer, and another portion being exposed from the second pixel opening; The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially in a direction away from the substrate. The third light-emitting unit also includes a third lower electrode located on the side of the third light-emitting layer facing the substrate. A portion of the third lower electrode is located between the substrate and the pixel definition layer, and another portion is exposed from the third pixel opening.

27. A method for manufacturing a display panel, characterized in that, include: Provide substrate; A pixel definition layer is prepared on one side of the substrate; An isolation structure is prepared on the side of the pixel definition layer opposite to the substrate; The isolation structure is graphically represented to form a first isolation opening, a second isolation opening, and a third isolation opening; The pixel definition layer is graphically represented to form a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening is connected to the first isolation opening, the second pixel opening is connected to the second isolation opening, and the third pixel opening is connected to the third isolation opening. A light-emitting unit is fabricated on one side of the substrate. The light-emitting unit includes a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a first light-emitting layer and a first upper electrode that are sequentially stacked in a direction away from the substrate. The first light-emitting layer includes a first end and a second end opposite to the first end in a first direction. The second light-emitting unit includes a second light-emitting layer and a second upper electrode that are sequentially stacked in a direction away from the substrate. The second light-emitting layer includes a third end and a fourth end opposite to the third end in the first direction. Wherein, the thickness of the first upper electrode located above the first end has a first difference with the thickness of the first upper electrode located above the second end, and the thickness of the second upper electrode located above the third end has a second difference with the thickness of the second upper electrode located above the fourth end, the absolute value of the first difference is greater than the absolute value of the second difference, and the first difference is not equal to 0. The pixel definition layer located on the periphery of the first light-emitting unit has a first minimum thickness, and the pixel definition layer located on the periphery of the second light-emitting unit has a second minimum thickness, wherein the first minimum thickness is less than the second minimum thickness.

28. The production method according to claim 27, wherein The light-emitting unit further includes a third light-emitting unit, and the fabrication of the light-emitting unit on one side of the substrate includes: The third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within the third isolation opening; The second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within the second isolation opening; The first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within the first isolation opening; The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness is not greater than the third minimum thickness.

29. The production method according to claim 27, wherein The light-emitting unit further includes a third light-emitting unit, and the fabrication of the light-emitting unit on one side of the substrate includes: The third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within the third isolation opening; The second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within the second isolation opening; The first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within the first isolation opening; The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the second minimum thickness and the third minimum thickness are equal.

30. The production method according to claim 29, wherein The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially in a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the first difference is greater than the absolute value of the third difference.

31. The production method according to claim 29, wherein The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

32. The production method according to claim 29, wherein The second upper electrode located above the third end and the second upper electrode located above the fourth end are both connected to the isolation structure.

33. The production method according to claim 30, wherein The third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

34. The production method according to claim 29, wherein The first light-emitting unit emits red light, the second light-emitting unit emits light in either blue or green, and the third light-emitting unit emits light in either blue or green.

35. The method of claim 27, wherein The light-emitting unit further includes a third light-emitting unit, and the fabrication of the light-emitting unit on one side of the substrate includes: The third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within the third isolation opening; The second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within the second isolation opening; The first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within the first isolation opening; The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, the first minimum thickness is less than the third minimum thickness, and the second minimum thickness is less than the third minimum thickness.

36. The preparation method according to claim 35, characterized in that, The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially in a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is greater than the absolute value of the second difference.

37. The preparation method according to claim 35, characterized in that, The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

38. The preparation method according to claim 35, characterized in that, The second upper electrode located above the third end and the second upper electrode located above the fourth end are both connected to the isolation structure.

39. The production method according to claim 36, wherein The thickness of the third upper electrode located above the fifth end is greater than the thickness of the third upper electrode located above the sixth end, wherein the third upper electrode located above the fifth end overlaps with the isolation structure, and the third upper electrode located above the sixth end is spaced apart from the isolation structure.

40. The preparation method according to claim 35, characterized in that, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

41. The preparation method according to claim 27, characterized in that, The light-emitting unit further includes a third light-emitting unit, and the fabrication of the light-emitting unit on one side of the substrate includes: The third light-emitting unit is prepared, and a portion of the third light-emitting unit is disposed within the third isolation opening; The second light-emitting unit is prepared, and a portion of the second light-emitting unit is disposed within the second isolation opening; The first light-emitting unit is prepared, and a portion of the first light-emitting unit is disposed within the first isolation opening; The pixel definition layer located on the periphery of the third light-emitting unit has a third minimum thickness, and the first minimum thickness is less than the third minimum thickness.

42. The preparation method according to claim 41, characterized in that, The third light-emitting unit includes a third light-emitting layer and a third upper electrode stacked sequentially along a direction away from the substrate. The third light-emitting layer includes a fifth end and a sixth end opposite to the fifth end in the first direction. The thickness of the third upper electrode above the fifth end and the thickness of the third upper electrode above the sixth end have a third difference, wherein the absolute value of the third difference is less than the absolute value of the first difference and the absolute value of the third difference is less than the absolute value of the second difference.

43. The preparation method according to claim 41, characterized in that, The thickness of the first upper electrode located above the first end is greater than the thickness of the first upper electrode located above the second end, wherein the first upper electrode located above the first end overlaps with the isolation structure, and the first upper electrode located above the second end is spaced apart from the isolation structure.

44. The preparation method according to claim 41, characterized in that, The thickness of the second upper electrode located above the third end is greater than the thickness of the second upper electrode located above the fourth end, wherein the second upper electrode located above the third end overlaps with the isolation structure, and the second upper electrode located above the fourth end is spaced apart from the isolation structure.

45. The preparation method according to claim 42, characterized in that, The third upper electrode located above the fifth end and the third upper electrode located above the sixth end are both connected to the isolation structure.

46. ​​The preparation method according to claim 41, characterized in that, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light.

47. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 26.

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