Display panel, preparation method thereof and display device

Abstract

The application relates to a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a plurality of light emitting units arranged at intervals on the substrate, and the light emitting unit comprises a plurality of light emitting functional layers arranged in layers. In any two adjacent light emitting functional layers, the outer contour of the orthographic projection of the light emitting functional layer far from the substrate on the substrate is located at the periphery of the orthographic projection of the light emitting functional layer close to the substrate on the substrate. In this way, most of the charges flowing through the device can become effective device current and form light emission, thereby improving the utilization rate of the device current and further improving the efficiency of the display panel.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) display panels are currently a hot topic in display panel research, offering advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angles, and fast response times. In related OLED display technologies, pixels are patterned to achieve a high PPI. However, improving the performance of OLED display panels remains a pressing issue. Summary of the Invention

[0003] Therefore, it is necessary to provide a display panel and its manufacturing method, as well as a display device, to address at least one of the above-mentioned problems.

[0004] In a first aspect, embodiments of this application provide a display panel, the display panel comprising:

[0005] Substrate; and

[0006] Multiple light-emitting units are spaced apart on the substrate; each light-emitting unit includes multiple light-emitting functional layers stacked on top of each other; in any two adjacent light-emitting functional layers, the outer contour of the orthographic projection of the light-emitting functional layer farther from the substrate on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer closer to the substrate on the substrate.

[0007] The display panel provided in this application embodiment ensures that the outer contour of the orthographic projection of the light-emitting functional layer furthest from the substrate on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer closest to the substrate. This allows all light-emitting functional layers to form a layer-by-layer structure. When the display panel is operating, all charges entering the next light-emitting functional layer must pass through the previous light-emitting functional layer. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light, thereby improving the utilization rate of device current and ultimately increasing the efficiency of the display panel.

[0008] In one embodiment, the light-emitting unit further includes a first electrode and a second electrode, wherein the first electrode, the plurality of light-emitting functional layers and the second electrode are stacked sequentially;

[0009] The outer contour of the orthographic projection of the second electrode on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer adjacent to the second electrode on the substrate.

[0010] Preferably, in any two adjacent light-emitting functional layers, the light-emitting functional layer farther from the substrate completely covers the top and side surfaces of the light-emitting functional layer closer to the substrate;

[0011] Preferably, the second electrode at least covers the top surface and side surface of the light-emitting functional layer adjacent to the second electrode;

[0012] Preferably, there is a first dimension between the center of the second electrode and the side surface of the second electrode, and a second dimension between the center of the light-emitting functional layer adjacent to the second electrode and the side surface of the light-emitting functional layer, wherein the first dimension is larger than the second dimension;

[0013] Preferably, in any two adjacent light-emitting functional layers, the center of the light-emitting functional layer closer to the substrate has a third dimension between it and the side surface of the light-emitting functional layer, and the center of the light-emitting functional layer farther from the substrate has a fourth dimension between it and the side surface of the light-emitting functional layer, wherein the fourth dimension is larger than the third dimension.

[0014] In one embodiment, the display panel further includes:

[0015] A partition structure is disposed on the substrate and defines multiple openings; the multiple light-emitting units are correspondingly disposed within the multiple openings;

[0016] Preferably, the partition structure includes a conductive material, and the second electrode of the light-emitting unit is electrically connected to the partition structure; the light-emitting functional layer of the light-emitting unit is spaced apart from the partition structure.

[0017] Preferably, there is a first distance between the center of the light-emitting unit and the sidewall of the partition structure; the first dimension is not less than the first distance.

[0018] The distance between the center of the light-emitting functional layer and the end of the light-emitting functional layer near the partition structure is less than the first distance;

[0019] Preferably, the substrate includes a pixel definition layer, on which a plurality of pixel openings are provided; the light-emitting unit is disposed within the pixel opening, the partition structure is disposed on the pixel definition layer, and each pixel opening is connected to one of the openings;

[0020] Preferably, the plurality of pixel openings are connected in a one-to-one correspondence with each other.

[0021] In this way, the partition structure not only has the function of isolation but also the function of conductivity, which makes it easy to connect the second electrode of the light-emitting unit to the driving circuit through the partition structure, thus optimizing the wiring layout of the display area.

[0022] In one embodiment, the partition structure includes an isolator and a blocking portion stacked on the substrate, wherein the outer contour of the blocking portion projected onto the substrate is located outside the outer contour of the isolator projected onto the substrate.

[0023] Preferably, the insulator comprises a conductive material, and the second electrode of the light-emitting unit is electrically connected to the insulator;

[0024] Preferably, the material of the separator includes at least one of a metal and a metal oxide;

[0025] Preferably, the orthographic projection of a portion of the light-emitting functional layer adjacent to the second electrode on the substrate coincides with the orthographic projection of a portion of the blocking portion on the substrate;

[0026] Preferably, the partition structure further includes a conductive portion disposed on the insulator, and the second electrode is electrically connected to the insulator through the conductive portion.

[0027] This allows for better partitioning of the partition structure, while also facilitating the connection of the second electrode of the light-emitting unit to the driving circuit via the isolator, thus optimizing the wiring layout of the display area.

[0028] In one embodiment, the light-emitting functional layer includes:

[0029] Main body; and

[0030] The edge portion is located on the periphery of the main body;

[0031] The edge portion, on the side facing away from the substrate, is constructed as a slope that is inclined from the main body portion toward the partition structure.

[0032] Preferably, the slope angle γ of the slope surface satisfies the condition: 0 degrees < γ ≤ 45 degrees.

[0033] This facilitates the formation of a layered structure for the light-emitting layer group, thereby improving the utilization rate of the device current.

[0034] In one embodiment, the light-emitting functional layer adjacent to the second electrode is the target light-emitting functional layer;

[0035] The edge portion of the target light-emitting functional layer has a side surface away from the substrate, a first side connected to the side surface away from the substrate of the main body portion of the target light-emitting functional layer, and a second side connected to the substrate; the bottom surface of the blocking portion has an edge line adjacent to the target light-emitting functional layer, the plane containing the first side and the edge line is a first plane, and the plane containing the second side and the edge line is a second plane.

[0036] Wherein, the first plane has a first angle with the plane parallel to the substrate, and the second plane has a second angle with the plane parallel to the substrate, the second angle being smaller than the first angle;

[0037] Preferably, the first angle is an obtuse angle and the second angle is an acute angle.

[0038] In this way, while forming a layered coating structure for the light-emitting layer group, it also facilitates the contact between the second electrode and the partition structure.

[0039] In one embodiment, the plurality of light-emitting functional layers include:

[0040] At least one first auxiliary light-emitting layer is disposed on the first electrode;

[0041] A light-emitting layer is disposed on the at least one first auxiliary light-emitting layer;

[0042] Preferably, the plurality of light-emitting functional layers further include:

[0043] At least one second auxiliary light-emitting layer is disposed on the light-emitting layer;

[0044] Preferably, the light-emitting functional layer includes a plurality of first auxiliary light-emitting layers stacked together, the plurality of first auxiliary light-emitting layers including a hole injection layer and a hole transport layer stacked on the first electrode;

[0045] The outer contour of the hole transport layer projected onto the substrate is located outside the outer contour of the hole injection layer projected onto the substrate.

[0046] Preferably, the plurality of first auxiliary light-emitting layers further include an optical adjustment layer;

[0047] The outer contour of the orthographic projection of the optical adjustment layer on the substrate is located outside the outer contour of the orthographic projection of the hole transport layer on the substrate; the outer contour of the orthographic projection of the light-emitting layer on the substrate is located outside the outer contour of the orthographic projection of the optical adjustment layer on the substrate.

[0048] Preferably, the light-emitting functional layer includes a plurality of second auxiliary light-emitting layers stacked on top of each other, and the plurality of second auxiliary light-emitting layers include a hole blocking layer and an electron transport layer stacked on top of the light-emitting layer;

[0049] The outer contour of the hole blocking layer projected onto the substrate is located outside the outer contour of the light-emitting layer projected onto the substrate.

[0050] The outer contour of the electron transport layer projected onto the substrate is located outside the outer contour of the hole blocking layer projected onto the substrate; the outer contour of the second electrode projected onto the substrate is located outside the outer contour of the electron transport layer projected onto the substrate.

[0051] This allows the display panel to have a better display effect.

[0052] Secondly, embodiments of this application provide a method for manufacturing a display panel, the method comprising:

[0053] Provide substrate;

[0054] A plurality of light-emitting units are formed on the substrate at intervals; the light-emitting unit includes a plurality of light-emitting functional layers stacked together; in any two adjacent light-emitting functional layers, the outer contour of the orthographic projection of the light-emitting functional layer away from the substrate on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer closer to the substrate on the substrate.

[0055] In one embodiment, the step of forming a plurality of spaced-apart light-emitting units on the substrate includes:

[0056] The first electrode of the light-emitting unit, the plurality of light-emitting functional layers, and the second electrode are sequentially formed on the substrate;

[0057] The light-emitting functional layer adjacent to the second electrode is the target light-emitting functional layer; the edge of the target light-emitting functional layer has a side surface away from the substrate, a first side connected to the side surface away from the substrate of the main body of the target light-emitting functional layer, and a second side connected to the substrate; the bottom surface of the blocking portion has an edge line adjacent to the target light-emitting functional layer, the plane containing the first side and the edge line is a first plane, and the plane containing the second side and the edge line is a second plane; wherein, the first plane has a first angle with the plane parallel to the substrate, and the second plane has a second angle with the plane parallel to the substrate; the second angle is smaller than the first angle;

[0058] The second electrode is formed by a vapor deposition process, and the vapor deposition angle of the second electrode is smaller than the second angle.

[0059] The display panel fabrication method provided in this application involves ensuring that the outer contour of the orthographic projection of the light-emitting functional layer furthest from the substrate on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer closest to the substrate. This allows all light-emitting functional layers to form a layer-by-layer structure. When the display panel is operating, all charges entering the next light-emitting functional layer must pass through the previous light-emitting functional layer. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light emission, thereby improving the utilization rate of device current and ultimately increasing the efficiency of the display panel.

[0060] Thirdly, embodiments of this application provide a display device including the display panel described in any of the embodiments of the first aspect.

[0061] The display device provided in this application embodiment arranges the outer contour of the orthographic projection of the light-emitting functional layer farther from the substrate onto the substrate in any two adjacent light-emitting functional layers of the display panel to be located outside the outer contour of the orthographic projection of the light-emitting functional layer closer to the substrate. This allows all the light-emitting functional layers to form a layer-by-layer structure. When the display panel is working, all charges entering the next light-emitting functional layer must pass through the previous light-emitting functional layer. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light emission, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0063] Figure 1 This is a schematic cross-sectional view of a display panel provided in one embodiment of this application.

[0064] Figure 2 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application.

[0065] Figure 3 for Figure 1 A partial structural diagram of the light-emitting functional layer of the display panel.

[0066] Figure 4 for Figure 1 The diagram shows a cross-sectional view of a portion of the display panel structure.

[0067] Figure 5 for Figure 1 A top view of the display panel shown.

[0068] Figure 6 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application.

[0069] Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0070] Explanation of reference numerals in the attached figures:

[0071] 100. Display device; 10. Display panel; 11. Substrate; 111. Base; 112. Pixel definition layer; 112a. Pixel opening; 12. Partition structure; 12a. Opening; 121. Insulator; 122. Blocking portion; 123. Conductive portion; 13. Light-emitting unit; 131. First electrode; 132. Light-emitting layer group; 1321. Light-emitting functional layer; 1321a. Main body portion; 1321b. Edge portion; 13211. Hole injection layer; 13212. Hole transport layer; 13213. Optical adjustment layer; 13214. Light-emitting layer; 13215. Hole blocking layer; 13216. Electron transport layer; 133. Second electrode. Detailed Implementation

[0072] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0073] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0074] In this document, spatial terms such as “upper” and “lower” are defined with reference to the accompanying drawings. Therefore, it will be understood that “upper” and “lower” are used interchangeably. It will be understood that when a layer is referred to as being “on” another layer, it can be formed directly on that other layer, or there may be intermediate layers. Therefore, it will be understood that when a layer is referred to as being “directly” on another layer, no intermediate layer is inserted in between.

[0075] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It is understood that when a layer or element is referred to as "on" another layer or substrate, the layer or element may be directly on said other layer or substrate, or there may be intermediate layers. Furthermore, it is understood that when a layer is referred to as "between two layers," the layer may be the only layer between said two layers, or there may be one or more intermediate layers. Additionally, the same reference numerals always denote the same elements.

[0076] In the following text, although terms such as “first” and “second” may be used to describe various components, these components are not necessarily limited to the terms above. The terms above are used only to distinguish one component from another. It will also be understood that expressions used in the singular form include plural expressions unless the singular form has a distinct meaning in the context. Furthermore, in the embodiments below, it will also be understood that the terms “comprising” and / or “having” as used herein indicate the presence of the stated feature or component, but do not exclude the presence or addition of one or more other features or components.

[0077] In the following embodiments, when a layer, region, or element is “connected,” it can be interpreted as the layer, region, or element being connected not only directly but also through other constituent elements placed therebetween. For example, when a layer, region, element, etc., is described as being connected or electrically connected, the layer, region, element, etc., can not only be directly connected or directly electrically connected, but can also be connected or electrically connected through another layer, region, element, etc., placed therebetween.

[0078] As used in the application documents, the term "and / or" includes any and all combinations of one or more of the related listed items. When a statement such as "at least one of..." follows a list of elements, it modifies the entire list of elements, not individual elements within that list.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0080] It should also be understood that the terms “including / comprise” or “have” specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0081] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0082] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0083] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0084] As described in the background section, in related OLED display technologies, patterning pixels eliminates the need for a fine metal mask (FMM) during pixel deposition, thereby achieving a higher pixel-per-inch (PPI). However, OLED display panels suffer from leakage current and low current utilization, which affects their display performance.

[0085] In view of at least one of the above-mentioned problems, embodiments of this application provide a display panel and a method for manufacturing the same, as well as a display device. By arranging the orthographic projection of the light-emitting functional layer furthest from the substrate onto the substrate of any two adjacent light-emitting functional layers to be located outside the orthographic projection of the light-emitting functional layer closest to the substrate, all charges entering the next light-emitting functional layer must pass through the previous light-emitting functional layer. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light emission, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel.

[0086] Specifically, refer to Figure 1 and Figure 2 As shown, in a first aspect, embodiments of this application provide a display panel 10, which includes:

[0087] Substrate 11; and

[0088] Multiple light-emitting units 13 are spaced apart on a substrate 11. Each light-emitting unit 13 includes multiple light-emitting functional layers 1321 stacked together. In any two adjacent light-emitting functional layers 1321, the outer contour of the orthographic projection of the light-emitting functional layer 1321 away from the substrate 11 on the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 close to the substrate 11 on the substrate 11.

[0089] It should be noted that the substrate 11 may be an array substrate including a pixel definition layer 112. The light-emitting functional layers 1321 may be an emission layer (EML), a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole block layer (HBL), or an electron block layer (EBL). In one example, the plurality of light-emitting functional layers 1321 may be a stack of light-emitting layers and other arbitrary film layers (hole injection layer, hole transport layer, electron injection layer, electron transport layer, hole block layer, and electron block layer). In another example, the plurality of light-emitting functional layers 1321 may also include at least two light-emitting layers and a charge generation layer (CGL) located between adjacent light-emitting layers.

[0090] The display panel 10 provided in this application embodiment ensures that the outer contour of the orthographic projection of the light-emitting functional layer 1321 farther from the substrate 11 on the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 closer to the substrate 11. This allows each film layer to form a layer-by-layer structure. When the display panel 10 is operating, all charges entering the next light-emitting functional layer 1321 must pass through the previous light-emitting functional layer 1321. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light, thereby improving the utilization rate of device current and thus increasing the efficiency of the display panel 10.

[0091] In one embodiment, the light-emitting unit 13 further includes a first electrode 131 and a second electrode 133. The first electrode 131, the light-emitting layer group 132, and the second electrode 133 are stacked sequentially. The light-emitting layer group 132 includes a plurality of stacked light-emitting functional layers 1321.

[0092] Specifically, the outer contour of the orthographic projection of the second electrode 133 onto the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 adjacent to the second electrode 133 onto the substrate 11. This forms a layer-by-layer structure. When the display panel 10 is in operation, all charges entering the next light-emitting functional layer 1321 must pass through the previous light-emitting functional layer 1321, and these charges can all flow out through the second electrode 133. This ensures that all charges flowing through the device can become effective device current and generate light, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel 10.

[0093] It is understood that, in another embodiment, the light-emitting unit 13 includes a first electrode 131 and a light-emitting layer group 132 stacked together, and the light-emitting layer group 132 includes a plurality of light-emitting functional layers 1321 stacked together. The display panel 10 includes a second electrode layer, which covers the side of all light-emitting units 13 facing away from the substrate 11, that is, the second electrode layer is a surface electrode, and all light-emitting units 13 share the second electrode layer.

[0094] In one embodiment, in any two adjacent light-emitting functional layers 1321, the light-emitting functional layer 1321 away from the substrate 11 completely covers the top surface and side surface of the light-emitting functional layer 1321 close to the substrate 11.

[0095] In this way, in two adjacent light-emitting functional layers 1321, the upper light-emitting functional layer 1321 can completely cover the surface of the lower light-emitting functional layer 1321. This ensures that all the charge flowing through the device can become effective device current and form light emission, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel 10.

[0096] In one embodiment, the second electrode 133 at least covers the top and side surfaces of the light-emitting functional layer 1321 adjacent to the second electrode 133.

[0097] This ensures that all the charge flowing through the device can become effective device current and generate light, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel 10.

[0098] In one embodiment, reference Figure 1 As shown, there is a first dimension W1 between the center of the second electrode 133 and its side surface, and a second dimension W2 between the center of the light-emitting functional layer 1321 adjacent to the second electrode 133 and its side surface. The first dimension W1 is larger than the second dimension W2. It should be noted that the center of the second electrode 133 refers to the geometric center of the second electrode 133.

[0099] In this way, when fabricating the second electrode 135, it is beneficial for the second electrode 133 to completely cover the light-emitting functional layer 1321 adjacent to it, thereby ensuring that all the charge flowing through the device can become effective device current and form light emission, thereby improving the utilization rate of device current and thus improving the efficiency of the display panel 10.

[0100] In one embodiment, in any two adjacent light-emitting functional layers 1321, the center of the light-emitting functional layer 1321 closer to the substrate 11 has a third dimension W3 with respect to its side surface, and the center of the light-emitting functional layer 1321 farther from the substrate 11 has a fourth dimension W4 with respect to its side surface, wherein the fourth dimension W4 is larger than the third dimension W3. It should be noted that the center of the light-emitting functional layer 1321 refers to its geometric center.

[0101] In this way, when manufacturing the light-emitting layer group 132, it is advantageous for the upper light-emitting functional layer 1321 to completely cover the adjacent lower light-emitting functional layer 1321, thereby forming a layered structure of the light-emitting layer group 132.

[0102] In one embodiment, the display panel 10 further includes:

[0103] A partition structure 12 is disposed on a substrate 11 and defines a plurality of openings 12a; a plurality of light-emitting units 13 are correspondingly disposed within the plurality of openings 12a.

[0104] Here, "multiple light-emitting units 13 are correspondingly disposed in multiple openings 12a" can mean that one light-emitting unit 13 corresponds to one opening 12a, or that multiple light-emitting units 13 correspond to one opening 12a.

[0105] By setting the partition structure 12, the light-emitting materials of adjacent light-emitting units 13 can be separated when the light-emitting material of the light-emitting unit 13 is deposited.

[0106] In one embodiment, the partition structure 12 includes a conductive material, and the second electrode 133 of the light-emitting unit 13 is electrically connected to the partition structure 12. The light-emitting layer group 132 of the light-emitting unit 13 is spaced apart from the partition structure 12.

[0107] In this way, the partition structure 12 not only has the function of isolation but also the function of conduction, which facilitates the connection of the second electrode 133 of the light-emitting unit 13 to the driving circuit through the partition structure 12, thereby optimizing the wiring layout of the display area. In addition, by setting the light-emitting layer group 132 of the light-emitting unit 13 apart from the partition structure 12, the current of the light-emitting unit 13 can be prevented from flowing from the light-emitting layer group 132 to the partition structure 12, thereby preventing leakage and ensuring the current efficiency of the display panel 10.

[0108] Here, the second electrode 133 of the light-emitting unit 13 is electrically connected to the partition structure 12. This connection can be achieved through direct contact or indirect contact. This embodiment does not limit the method of electrical connection between the second electrode 133 and the partition structure 12, as long as it enables electrical connection. Here, "spaced arrangement" refers to a distance between the light-emitting layer group 132 and the partition structure 12.

[0109] In one embodiment, such as Figure 1 As shown, there is a first distance L1 between the center of the light-emitting unit 13 and the side wall of the partition structure 12, and the first dimension W1 is not less than the first distance L1, that is, the first dimension W1 is greater than or equal to the first distance L1. Here, it should be noted that the first distance L1 refers to the distance between the geometric center of the light-emitting unit 13 and the side wall of the partition structure 12 on the side closer to the light-emitting unit 13.

[0110] In this way, the second electrode 133 can be electrically connected to the isolation structure 12.

[0111] It should be noted here that the first distance L1 refers to the distance between the center of the light-emitting unit 13 and the bottom of the partition structure 12.

[0112] In one example, the sidewall of the partition structure 12 is a vertical surface, and the second electrode 133 contacts the partition structure 12 to achieve electrical connection between the two. At this time, the first dimension W1 is equal to the first distance L1.

[0113] In another example, the sidewall of the partition structure 12 is an inclined surface, and the second electrode 133 climbs on the sidewall of the partition structure 12. In this case, the first dimension W1 is greater than the first distance L1.

[0114] In one embodiment, the distance between the center of the light-emitting functional layer 1321 and the end of the light-emitting functional layer 1321 near the partition structure 12 is less than a first distance L1. This spacing between the light-emitting layer group 132 (all the light-emitting functional layers 1321) of the light-emitting unit 13 and the partition structure 12 prevents current from flowing from the light-emitting unit 13 from the light-emitting layer group 132 to the partition structure 12, thus avoiding leakage and ensuring the current efficiency of the display panel 10.

[0115] In one embodiment, the substrate 11 includes a pixel definition layer 112, on which a plurality of pixel openings 112a are provided; a light-emitting unit 13 is disposed in the pixel opening 112a, and a partition structure 12 is disposed on the pixel definition layer 112, wherein each pixel opening 112a is connected to an opening 12a.

[0116] By providing a pixel opening 112a on the pixel definition layer 112, it is convenient to provide a light-emitting unit 13 on the substrate 11.

[0117] In one embodiment, multiple pixel openings 112a are connected to multiple openings 12a in a one-to-one correspondence. It should be noted here that "connected in a one-to-one correspondence" means that each opening 12a corresponds to one pixel opening 112a.

[0118] In another embodiment, one opening 12a corresponds to multiple pixel openings 112a, and each pixel opening 112a corresponding to the opening 12a is provided with the same type of light-emitting unit 13.

[0119] This allows the display panel 10 to have a better display effect.

[0120] It should be noted that when multiple light-emitting units 13 are disposed within an opening 12a, these light-emitting units 13 can share the same second electrode 133. Furthermore, the second electrode 133 can cover the top surface and side surface of the light-emitting layer group 132 of these light-emitting units 13, that is, cover the top surface of the light-emitting functional layer 1321 of a portion of the light-emitting units 13 and the side surface of the light-emitting functional layer 1321 of another portion of the light-emitting units 13.

[0121] In one embodiment, the partition structure 12 includes an isolator 121 and a blocking portion 122 stacked on the substrate 11. The outer contour of the orthographic projection of the blocking portion 122 on the substrate 11 is located outside the outer contour of the orthographic projection of the isolator 121 on the substrate 11.

[0122] In this way, the partition structure 12 can form an undercut structure that is "larger at the top and smaller at the bottom". When the light-emitting unit 13 is deposited, the undercut structure can isolate the light-emitting material of the light-emitting unit 13.

[0123] In one embodiment, the isolator 121 includes a conductive material, and the second electrode 133 of the light-emitting unit 13 is electrically connected to the isolator 121. By including a conductive material in the isolator 121, it is easier to electrically connect the second electrode 133 to the partition structure 12, thereby connecting the second electrode 133 of the light-emitting unit 13 to the driving circuit through the isolator 121, thus optimizing the wiring layout of the display area.

[0124] In one embodiment, the material of the insulator 121 includes at least one of a metal and a metal oxide.

[0125] For example, the metal can be silver, copper, titanium, aluminum, etc. The metal oxide can be tin oxide, zinc oxide, cadmium oxide, indium oxide, indium tin oxide, zinc indium oxide, zinc gallium oxide, zinc aluminum oxide, titanium tantalum oxide, etc.

[0126] In one embodiment, a portion of the orthographic projection of the light-emitting functional layer 1321 adjacent to the second electrode 133 onto the substrate 11 coincides with a portion of the orthographic projection of the blocking portion 122 onto the substrate 11.

[0127] This is equivalent to a portion of the light-emitting functional layer 1321 adjacent to the second electrode 133 being located directly below the blocking portion 122. This ensures that the display panel 10 has good light-emitting performance; furthermore, when depositing the second electrode 133 of the light-emitting unit 13, it facilitates the second electrode 133 extending along the surface of the light-emitting functional layer 1321 adjacent to the second electrode 133 towards the partition structure 12. This not only promotes the formation of a layer-by-layer structure for each film layer of the light-emitting unit 13, but also facilitates the overlap between the second electrode 133 and the partition structure 12.

[0128] In one embodiment, reference Figure 2 As shown, the partition structure 12 also includes a conductive part 123 disposed on the isolator 121, and the second electrode 133 is electrically connected to the isolator 121 through the conductive part 123.

[0129] By providing the conductive part 123, it is easy to electrically connect the second electrode 133 to the insulator 121.

[0130] Specifically, the conductive portion 123 is disposed at the foot of the insulator 121 (the end of the insulator 121 near the substrate 11), one end of the conductive portion 123 is connected to the insulator 121, and the other end of the conductive portion 123 is connected to the second electrode 133. Further, the conductive portion 123 may be integrally disposed with the insulator 121. The material of the conductive portion 123 includes at least one of metal and metal oxide.

[0131] In one embodiment, reference Figure 3 As shown, the light-emitting functional layer 1321 includes:

[0132] Main body 1321a; and

[0133] The edge portion 1321b is provided on the periphery of the main body portion 1321a;

[0134] The edge portion 1321b has a surface structured as a slope that is inclined from the main body portion 1321a toward the partition structure 12.

[0135] Here, edge portion 1321b can be understood as the edge structure of the light-emitting functional layer 1321. "Slope" can be understood as: a surface that is inclined, that is: the top surface of edge portion 1321b has an angle with the horizontal plane where the substrate 11 is located.

[0136] This facilitates the formation of a layered structure for the light-emitting layer group 132, thereby improving the utilization rate of the device current.

[0137] It is understood that the thickness of the edge portion 1321b of each light-emitting functional layer 1321 can be uniform or unequal. Furthermore, the thickness of the edge portion 1321b can gradually decrease from the end near the main body portion 1321a to the end away from the main body portion 1321a. Here, the thickness of the edge portion 1321b refers to the distance between the surface of the edge portion 1321b near the substrate 11 and the surface of the edge portion 1321b away from the substrate 11.

[0138] In one embodiment, the slope angle γ of the slope surface satisfies the condition: 0 degrees < γ ≤ 45 degrees.

[0139] By keeping the slope angle within the above range, it is easier to form a continuous light-emitting functional layer 1321 on the edge portion 1321b of the next layer of light-emitting functional layer 1321 during vapor deposition, thereby forming a layer-on-layer (layer-on-layer) structure.

[0140] In one embodiment, reference Figure 3 and Figure 4 As shown, the light-emitting functional layer 1321 adjacent to the second electrode 133 is the target light-emitting functional layer;

[0141] The edge portion 1321b of the target light-emitting functional layer has a side surface away from the substrate 11, a first side a connected to the side surface away from the substrate 11 of the main body portion 1321a of the target light-emitting functional layer, and a second side b connected to the substrate 11; the bottom surface of the blocking portion 122 has an edge line c adjacent to the target light-emitting functional layer, the plane containing the first side a and the edge line c is a first plane, and the plane containing the second side b and the edge line c is a second plane.

[0142] Here, it should be noted that, in Figure 4 In the diagram, the first side 'a' extends in a direction perpendicular to the paper, and is therefore represented by a point. The second side 'b' extends in a direction perpendicular to the paper, and is therefore represented by a point. The edge line 'c' extends in a direction perpendicular to the paper, and is therefore represented by a point.

[0143] The first plane has a first angle α1 with the plane parallel to the substrate 11, and the second plane has a second angle α2 with the plane parallel to the substrate 11, the second angle α2 being smaller than the first angle α1.

[0144] In this way, while forming a layered coating structure for the light-emitting layer group 132, it is convenient for the second electrode 133 to contact the partition structure 12.

[0145] In one embodiment, the first angle α1 is an obtuse angle and the second angle α2 is an acute angle.

[0146] In this way, when depositing the second electrode 133, the deposition angle can be controlled to form a continuous second electrode 133 on the side surface of the target light-emitting functional layer, and the second electrode 133 can be electrically connected to the partition structure 12.

[0147] In one embodiment, the plurality of light-emitting functional layers 1321 include:

[0148] At least one first auxiliary light-emitting layer is disposed on the first electrode 131;

[0149] The light-emitting layer 13214 is disposed on at least one first auxiliary light-emitting layer;

[0150] At least one second auxiliary light-emitting layer is disposed on the light-emitting layer 13214.

[0151] It should be noted that when the light-emitting functional layer 1321 includes a first auxiliary light-emitting layer, the first auxiliary light-emitting layer may be at least one of the following films: a hole injection layer 13211, a hole transport layer 13212, and an electron blocking layer. When the light-emitting functional layer 1321 includes a second auxiliary light-emitting layer, the second auxiliary light-emitting layer may be at least one of the following films: a hole blocking layer 13215, an electron transport layer 13216, and an electron injection layer.

[0152] In one embodiment, reference Figure 1 , Figure 2 and Figure 4 As shown, the light-emitting functional layer 1321 includes a plurality of first auxiliary light-emitting layers stacked on top of each other. The plurality of first auxiliary light-emitting layers include a hole injection layer 13211 and a hole transport layer 13212 stacked on the first electrode 131.

[0153] The outer contour of the hole transport layer 13212 projected onto the substrate 11 is located outside the outer contour of the hole injection layer 13211 projected onto the substrate 11.

[0154] In one embodiment, the plurality of first auxiliary light-emitting layers further include an optical adjustment layer 13213, the outer contour of the orthographic projection of the optical adjustment layer 13213 on the substrate 11 being located outside the outer contour of the orthographic projection of the hole transport layer 13212 on the substrate 11.

[0155] The outer contour of the orthographic projection of the light-emitting layer 13214 on the substrate 11 is located outside the outer contour of the orthographic projection of the optical adjustment layer 13213 on the substrate 11.

[0156] In this way, the hole injection layer 13211, the hole transport layer 13212, the optical modulation layer 13213, and the light emission layer 13214 can form a structure of one layer covering another (layer-by-layer covering).

[0157] In one embodiment, the light-emitting functional layer 1321 includes a plurality of second auxiliary light-emitting layers stacked on top of the light-emitting layer 13214, and the plurality of second auxiliary light-emitting layers include a hole blocking layer 13215 and an electron transport layer 13216 stacked on the light-emitting layer 13214.

[0158] The outer contour of the hole blocking layer 13215 projected onto the substrate 11 is located outside the outer contour of the light-emitting layer 13214 projected onto the substrate 11.

[0159] The outer contour of the orthographic projection of the electron transport layer 13216 on the substrate 11 is located outside the outer contour of the orthographic projection of the hole blocking layer 13215 on the substrate 11.

[0160] The outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the electron transport layer 13216 on the substrate 11.

[0161] In this way, the light-emitting layer 13214, the hole-blocking layer 13215, the electron transport layer 13216, and the second electrode 133 can form a layer-by-layer (layer-by-layer) structure. In the embodiments of this application, the electron transport layer 13216 is the target light-emitting functional layer described above.

[0162] It should be noted that, please refer to Figure 5 As shown, the light-emitting unit 13 includes at least a blue light-emitting unit 13, a green light-emitting unit 13, and a red light-emitting unit 13. The areas of the orthographic projections of the light-emitting units 13 of different colors onto the substrate 11 can be different. Therefore, it can be understood that the areas of the second electrodes 133 of the light-emitting units 13 of different colors onto the substrate 11 can be different, and the areas of the light-emitting functional layers 1321 of the light-emitting units 13 of different colors onto the substrate 11 can be different. Further, the partition structure 12 defines different types of openings 12a, wherein the opening sizes of the openings 12a corresponding to the blue light-emitting units 13, the green light-emitting units 13, and the red light-emitting units 13 can all be different.

[0163] Secondly, referring to Figure 6 As shown in the figure, this application provides a method for manufacturing a display panel, the method comprising:

[0164] S100: Provide substrate 11. For example, substrate 11 may be an array substrate 11.

[0165] S200: A plurality of light-emitting units 13 are formed on the substrate 11 at intervals. Each light-emitting unit 13 includes a plurality of light-emitting functional layers 1321 stacked on top of each other. In any two adjacent light-emitting functional layers 1321, the outer contour of the orthographic projection of the light-emitting functional layer 1321 farther from the substrate 11 on the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 closer to the substrate 11 on the substrate 11.

[0166] The method for fabricating a display panel provided in this application involves positioning the outer contour of the orthographic projection of the light-emitting functional layer 1321 furthest from the substrate 11 onto the substrate 11 of any two adjacent light-emitting functional layers 1321. This ensures that all charges entering the next light-emitting functional layer 1321 must pass through the previous light-emitting functional layer 1321. This guarantees that the majority of the charge flowing through the device becomes effective device current and generates light emission, thereby improving the utilization rate of device current and ultimately increasing the efficiency of the display panel 10.

[0167] In one embodiment, S200: the step of forming a plurality of spaced-apart light-emitting units 13 on the substrate 11 includes:

[0168] S210: A first electrode 131, a plurality of light-emitting functional layers 1321, and a second electrode 133 of a light-emitting unit 13 are sequentially formed on a substrate 11. The outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 adjacent to the second electrode 133 on the substrate 11.

[0169] Specifically, refer to Figure 4 As shown, the light-emitting functional layer 1321 adjacent to the second electrode 133 is the target light-emitting functional layer. The edge portion 1321b of the target light-emitting functional layer has a side surface away from the substrate 11, a first side a connected to the side surface away from the substrate 11 of the main body portion 1321a of the target light-emitting functional layer, and a second side b connected to the substrate 11; the bottom surface of the blocking portion 122 has an edge line c adjacent to the target light-emitting functional layer, the plane containing the first side a and the edge line c is a first plane, and the plane containing the second side b and the edge line c is a second plane; wherein, the first plane has a first angle α1 between it and the plane parallel to the substrate 11, and the second plane has a second angle α2 between it and the plane parallel to the substrate 11, the second angle α2 is smaller than the first angle α1, and the evaporation angle α3 of the second electrode 133 is smaller than the second angle α2.

[0170] Here, it should be noted that, in Figure 4In the diagram, the first side 'a' extends in a direction perpendicular to the paper, and is therefore represented by a point. The second side 'b' extends in a direction perpendicular to the paper, and is therefore represented by a point. The edge line 'c' extends in a direction perpendicular to the paper, and is therefore represented by a point.

[0171] It should also be noted that the evaporation angle of the second electrode 133 refers to the angle corresponding to the maximum range that can be evaporated when the second electrode 133 is evaporated. By making α1, α2 and α3 have the above relationship, it can be ensured that a continuous second electrode 133 can be formed on the side surface of the target light-emitting functional layer, and that the second electrode 133 can contact the insulator 121 to achieve electrical connection.

[0172] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the accompanying drawings may include multiple steps or stages, which are not necessarily completed at the same time, but may be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but may be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0173] Thirdly, referring to Figure 7 As shown, this application provides a display device 100, including a display panel 10 of any embodiment of the first aspect.

[0174] The display device 100 can be a mobile or fixed terminal with a display panel 10, such as a mobile phone, television, tablet computer, laptop computer, Ultra-Mobile Personal Computer (UMPC), Personal Digital Assistant (PDA), navigation device, smartwatch, virtual reality device, etc.

[0175] The display device 100 provided in this application embodiment ensures that the outer contour of the orthographic projection of the light-emitting functional layer 1321 farther from the substrate 11 on the substrate 11 is located outside the outer contour of the orthographic projection of the light-emitting functional layer 1321 closer to the substrate 11. In this way, all charges entering the next light-emitting functional layer 1321 must pass through the previous light-emitting functional layer 1321. This ensures that the vast majority of the charge flowing through the device becomes effective device current and generates light, thereby improving the utilization rate of device current and thus improving the efficiency of the display device 100.

[0176] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0177] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; as well as Multiple light-emitting units are spaced apart on the substrate; The light-emitting unit includes a plurality of stacked light-emitting functional layers; in any two adjacent light-emitting functional layers, the outer contour of the orthographic projection of the light-emitting functional layer away from the substrate on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer close to the substrate on the substrate; in any two adjacent light-emitting functional layers, the light-emitting functional layer away from the substrate completely covers the top surface and side surface of the light-emitting functional layer close to the substrate; the light-emitting unit also includes a first electrode and a second electrode, the first electrode, the plurality of light-emitting functional layers and the second electrode being stacked sequentially in a direction away from the substrate; The display panel also includes: A partition structure is disposed on the substrate and defines multiple openings; multiple light-emitting units are correspondingly disposed within the multiple openings; the partition structure includes an isolator and a blocking portion stacked on the substrate, wherein the outer contour of the orthographic projection of the blocking portion on the substrate is located outside the outer contour of the orthographic projection of the isolator on the substrate. The light-emitting functional layer includes: Main body; and The edge portion is located on the periphery of the main body; The edge portion facing the partition structure is constructed as a slope that is inclined from the main body to the partition structure; the slope angle γ of the slope surface satisfies the condition: 0 degrees < γ ≤ 45 degrees. The light-emitting functional layer adjacent to the second electrode is the target light-emitting functional layer; The edge portion of the target light-emitting functional layer has a side surface away from the substrate, a first side connected to the side surface away from the substrate of the main body portion of the target light-emitting functional layer, and a second side connected to the substrate; the bottom surface of the blocking portion has an edge line adjacent to the target light-emitting functional layer, the plane containing the first side and the edge line is a first plane, and the plane containing the second side and the edge line is a second plane. Wherein, the first plane has a first angle with the plane parallel to the substrate, and the second plane has a second angle with the plane parallel to the substrate, the second angle being smaller than the first angle; the first angle is an obtuse angle, and the second angle is an acute angle.

2. The display panel according to claim 1, characterized in that, The outer contour of the orthographic projection of the second electrode on the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer adjacent to the second electrode on the substrate.

3. The display panel according to claim 2, characterized in that, The second electrode at least covers the top and side surfaces of the light-emitting functional layer adjacent to the second electrode.

4. The display panel according to claim 2, characterized in that, The center of the second electrode and its side surface have a first dimension, and the center of the light-emitting functional layer adjacent to the second electrode and its side surface have a second dimension, wherein the first dimension is larger than the second dimension.

5. The display panel according to claim 2, characterized in that, In any two adjacent light-emitting functional layers, the center of the light-emitting functional layer closer to the substrate has a third dimension between it and the side surface of the light-emitting functional layer, and the center of the light-emitting functional layer farther from the substrate has a fourth dimension between it and the side surface of the light-emitting functional layer, wherein the fourth dimension is larger than the third dimension.

6. The display panel according to claim 2, characterized in that, The partition structure includes a conductive material, and the second electrode of the light-emitting unit is electrically connected to the partition structure; the light-emitting functional layer of the light-emitting unit is spaced apart from the partition structure.

7. The display panel according to claim 4, characterized in that, There is a first distance between the center of the light-emitting unit and the sidewall of the partition structure; the first dimension is not less than the first distance. The distance between the center of the light-emitting functional layer and the end of the light-emitting functional layer closest to the partition structure is less than the first distance.

8. The display panel according to claim 2, characterized in that, The substrate includes a pixel definition layer, on which a plurality of pixel openings are provided; the light-emitting unit is disposed within the pixel openings, and the partition structure is disposed on the pixel definition layer, with each pixel opening communicating with one of the openings.

9. The display panel according to claim 8, characterized in that, The plurality of pixel openings are connected one-to-one with each other.

10. The display panel according to claim 6, characterized in that, The insulator comprises a conductive material, and the second electrode of the light-emitting unit is electrically connected to the insulator.

11. The display panel according to claim 10, characterized in that, The material of the insulator includes at least one of metals and metal oxides.

12. The display panel according to claim 11, characterized in that, The orthographic projection of the light-emitting functional layer adjacent to the second electrode on the substrate coincides with the orthographic projection of the blocking portion on the substrate.

13. The display panel according to claim 12, characterized in that, The isolation structure further includes a conductive portion disposed on the isolator, and the second electrode is electrically connected to the isolator through the conductive portion.

14. The display panel according to any one of claims 2-13, characterized in that, The plurality of light-emitting functional layers include: At least one first auxiliary light-emitting layer is disposed on the first electrode; A light-emitting layer is disposed on the at least one first auxiliary light-emitting layer.

15. The display panel according to claim 14, characterized in that, The plurality of light-emitting functional layers also include: At least one second auxiliary light-emitting layer is disposed on the light-emitting layer.

16. The display panel according to claim 15, characterized in that, The light-emitting functional layer includes a plurality of first auxiliary light-emitting layers stacked together, and the plurality of first auxiliary light-emitting layers includes a hole injection layer and a hole transport layer stacked on the first electrode; The outer contour of the hole transport layer projected onto the substrate is located outside the outer contour of the hole injection layer projected onto the substrate.

17. The display panel according to claim 16, characterized in that, The plurality of first auxiliary light-emitting layers also include an optical adjustment layer; The outer contour of the optical adjustment layer projected onto the substrate is located outside the outer contour of the hole transport layer projected onto the substrate. The outer contour of the orthographic projection of the light-emitting layer on the substrate is located outside the outer contour of the orthographic projection of the optical adjustment layer on the substrate.

18. The display panel according to claim 16, characterized in that, The light-emitting functional layer includes a plurality of second auxiliary light-emitting layers stacked together, and the plurality of second auxiliary light-emitting layers include a hole blocking layer and an electron transport layer stacked on the light-emitting layer; The outer contour of the hole blocking layer projected onto the substrate is located outside the outer contour of the light-emitting layer projected onto the substrate. The outer contour of the electron transport layer projected onto the substrate is located outside the outer contour of the hole blocking layer projected onto the substrate. The outer contour of the second electrode projected onto the substrate is located outside the outer contour of the electron transport layer projected onto the substrate.

19. A method for manufacturing a display panel, characterized in that, include: Provide substrate; A plurality of light-emitting units are formed at intervals on the substrate; each light-emitting unit includes a plurality of stacked light-emitting functional layers; in any two adjacent light-emitting functional layers, the outer contour of the orthographic projection of the light-emitting functional layer away from the substrate is located outside the outer contour of the orthographic projection of the light-emitting functional layer close to the substrate; in any two adjacent light-emitting functional layers, the light-emitting functional layer away from the substrate completely covers the top surface and side surface of the light-emitting functional layer close to the substrate; the display panel further includes a partition structure disposed on the substrate. The plate is divided into multiple openings; the multiple light-emitting units are correspondingly disposed within the multiple openings; the light-emitting functional layer includes a main body and an edge portion disposed around the periphery of the main body; wherein, the surface of the edge portion facing the partition structure is constructed as a slope inclined from the main body to the partition structure; the slope angle γ of the slope surface satisfies the condition: 0 degrees < γ ≤ 45 degrees; the partition structure includes an isolator and a blocking portion stacked on the substrate, the outer contour of the orthographic projection of the blocking portion on the substrate is located outside the outer contour of the orthographic projection of the isolator on the substrate; The step of forming a plurality of spaced-apart light-emitting units on the substrate includes: The first electrode of the light-emitting unit, the plurality of light-emitting functional layers, and the second electrode are sequentially formed on the substrate; The light-emitting functional layer adjacent to the second electrode is the target light-emitting functional layer; the edge of the target light-emitting functional layer has a side surface away from the substrate, a first side connected to the side surface away from the substrate of the main body of the target light-emitting functional layer, and a second side connected to the substrate; the bottom surface of the blocking portion has an edge line adjacent to the target light-emitting functional layer, the plane containing the first side and the edge line is a first plane, and the plane containing the second side and the edge line is a second plane; wherein, the first plane has a first angle with the plane parallel to the substrate, and the second plane has a second angle with the plane parallel to the substrate; the second angle is smaller than the first angle; The second electrode is formed by a vapor deposition process, and the vapor deposition angle of the second electrode is smaller than the second angle.

20. A display device, characterized in that, Includes the display panel as described in any one of claims 1-18.

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