Display panel, display device, and method for manufacturing display panel

Abstract

SOLUTION: To provide a display panel, a display device, and a method of manufacturing the display panel. The display panel includes a substrate, an isolation structure, a light-emitting functional layer, and a plurality of first electrodes, the isolation structure surrounds a plurality of first openings and a plurality of second openings, the isolation structure includes a first portion and a second portion that are stacked, and the light-emitting functional layer includes a plurality of first light-emitting units and a plurality of second light-emitting units. At least a portion of the first light-emitting component is disposed in the first opening, at least a portion of the second light-emitting component is disposed in the second opening, edges of the first electrodes overlap with the first portion, a minimum spacing between the orthographic projections of the first edges and the side of the first portion facing the substrate is H1, a minimum spacing between the orthographic projections of the second edges and the side of the first portion facing the substrate is H2, and H1 <H2.EFFECT: The display panel provided by the present application can optimize the manufacturing process of the display panel.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to the display field, and in particular to a display panel, a display device, and a method for manufacturing a display panel. [Background technology]

[0002] Display panels based on technologies such as organic light-emitting diodes (OLEDs) and light-emitting diodes (LEDs) have advantages such as high image quality, low power consumption, thinness, and a wide range of applications, and are therefore widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers, becoming the mainstream display device. However, the current manufacturing process of display panels needs to be improved. Summary of the Invention [Problem to be solved by the invention]

[0003] The embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel to improve the technical problems of the related manufacturing process of the display panel. [Means for solving the problem]

[0004] An embodiment of the first aspect of the present application provides a display panel, the display panel comprising: a substrate, an isolation structure, a light-emitting functional layer, and a plurality of first electrodes; the isolation structure is provided on one side of the substrate, surrounds a plurality of first openings and a plurality of second openings, and includes a first portion and a second portion that are stacked one on the other, the first portion is provided on a side of the second portion closer to the substrate, an orthogonal projection of the first portion on the substrate is located within an orthogonal projection of the second portion on the substrate, the second portion includes a blocking edge, an orthogonal projection of the blocking edge on the substrate is located at an edge of the orthogonal projection of the second portion on the substrate, and the blocking edge includes a first edge that defines the first openings and a second edge that defines the second openings; the light-emitting functional layer includes a plurality of first light-emitting units and a plurality of second light-emitting units, at least a portion of the first light-emitting units is provided within a first opening, at least a portion of the second light-emitting units is provided within a second opening, and the wavelength of the light wave emitted by the first light-emitting units is different from the wavelength of the light wave emitted by the second light-emitting units; The plurality of first electrodes are located on the side of the light-emitting functional layer away from the substrate, and edges of the first electrodes are overlapped and connected to the side surface of the first portion facing the limiting opening, and the plurality of first electrodes include a first electrode portion provided on one side of the first light-emitting portion and a second electrode portion provided on one side of the second light-emitting portion, and the shortest connecting line between the edge of the first electrode portion and the first edge is a first connecting line, and the shortest connecting line between the edge of the second electrode portion and the second edge is a second connecting line, and the included angle between the second connecting line and the plane on which the substrate is located is smaller than the included angle between the first connecting line and the plane on which the substrate is located.

[0005] According to an embodiment of the first aspect of the present application, the plurality of limiting openings further include third openings, the light-emitting functional layer further includes a plurality of third light-emitting units, at least a portion of the third light-emitting units is disposed within the third openings, and the blocking edge further includes a third edge defining the third openings; The plurality of first electrodes include a third electrode portion provided on one side of the third light-emitting portion, and the shortest connecting line between the edge of the third electrode portion and the third edge is a third connecting line, and the included angle between the third connecting line and the plane on which the substrate is located is smaller than the included angle between the second connecting line and the plane on which the substrate is located.

[0006] According to an embodiment of the first aspect of the present application, the blocking edge includes a first edge defining a first opening and a second edge defining a second opening, wherein a minimum distance from an orthogonal projection of the first edge on the substrate to an orthogonal projection of the first portion on the substrate is H1, a minimum distance from an orthogonal projection of the second edge on the substrate to an orthogonal projection of the first portion on the substrate is H2, and H1 <H2である。

[0007] According to an embodiment of the first aspect of the present application, the second portion has a trapezoidal cross section along a direction perpendicular to the plane in which the substrate lies.

[0008] According to an embodiment of the first aspect of the present application, the area of ​​an orthogonal projection of a surface of the second portion away from the substrate on the substrate is smaller than the area of ​​an orthogonal projection of a surface of the second portion closer to the substrate on the substrate.

[0009] According to an embodiment of the first aspect of the present application, the blocking edge is a periphery of the surface of the second part that is close to the substrate.

[0010] According to an embodiment of the first aspect of the present application, the first portion has a trapezoidal cross section along a direction perpendicular to the plane in which the substrate lies.

[0011] According to an embodiment of the first aspect of the present application, the area of ​​an orthogonal projection of a surface of the first portion away from the substrate on the substrate is smaller than the area of ​​an orthogonal projection of a surface of the second portion closer to the substrate on the substrate.

[0012] According to an embodiment of the first aspect of the present application, the first portion comprises a single layer metal structure.

[0013] According to an embodiment of the first aspect of the present application, the first portion includes a multi-layer metal structure, and an edge of the first electrode is overlap-connected to the metal structure.

[0014] According to an embodiment of the first aspect of the present application, the first portion comprises aluminum.

[0015] According to an embodiment of the first aspect of the present application, the first portion comprises a first subsection and a second subsection stacked one on top of the other, the second subsection being located on a side of the first subsection facing away from the substrate, the first subsection comprising molybdenum and / or titanium, and the second subsection comprising aluminum.

[0016] According to an embodiment of the first aspect of the present application, the display panel further includes a pixel definition layer disposed between the substrate and the isolation structure, the pixel definition layer including a pixel aperture, the orthogonal projection of the pixel aperture on the substrate being located within a range of the orthogonal projection of the limiting aperture on the substrate.

[0017] According to an embodiment of the first aspect of the present application, the isolation structure is provided on a side of the pixel definition layer remote from the substrate, and the light-emitting functional layer is at least partially provided within the pixel opening.

[0018] An embodiment of a second aspect of the present application provides a method for manufacturing a display panel, comprising: providing a substrate; forming an isolation structure on one side of the substrate; and forming a light-emitting functional layer and a first electrode; the isolation structure surrounds a plurality of limiting openings, the limiting openings including first and second openings, the isolation structure includes a first portion and a second portion stacked one upon the other, the first portion is provided on one side of the second portion closer to the substrate, the orthogonal projection of the first portion on the substrate is located within the orthogonal projection of the second portion on the substrate, the second portion includes a blocking edge, the orthogonal projection of the blocking edge on the substrate is located at an edge of the orthogonal projection of the second portion on the substrate, the blocking edge including a first edge defining the first openings and a second edge defining the second openings; the light-emitting functional layer includes a first light-emitting portion and a second light-emitting portion, at least a portion of the first light-emitting portion is provided within the first opening, and at least a portion of the second light-emitting portion is provided within the second opening; the plurality of first electrodes include a first electrode portion and a second electrode portion provided on one side of the second light-emitting portion, the shortest connecting line between the edge of the first electrode portion and the first edge is a first connecting line, the shortest connecting line between the edge of the second electrode portion and the second edge is a second connecting line, and the included angle between the second connecting line and the plane on which the substrate is located is smaller than the included angle between the first connecting line and the plane on which the substrate is located.

[0019] According to an embodiment of the second aspect of the present application, the step of forming the light-emitting functional layer and the first electrode includes: disposing a first luminescent material in each limiting opening, and depositing a first conductive material at a first deposition angle, the first conductive material being stacked on one side of the first luminescent material; performing a removal process on the first light-emitting material and the conductive material in the second opening to expose the second electrode through the limited opening, the second electrode being located on a side of the light-emitting functional layer closer to the substrate; disposing a second luminescent material in each limiting opening, and depositing a second conductive material at a second deposition angle, the second conductive material being stacked on one side of the second luminescent material, the first deposition angle being smaller than the second deposition angle; performing a removal process on the second light-emitting material and the second conductive material in the first opening.

[0020] An embodiment of a third aspect of the present application provides a display device including the display panel of any of the above embodiments, or a display panel manufactured by the method of any of the above embodiments.

[0021] According to the display panel, display device, and manufacturing method of the display panel according to the embodiments of the present application, by providing an isolation structure, it is possible to manufacture the light-emitting portion and the first electrode, at least a portion of which is located within the limiting aperture, without using a metal mask, thereby eliminating the process and cost of the metal mask, optimizing the manufacturing process of the display panel, improving the production efficiency of the display panel, and reducing the production cost of the display panel.By making the included angle between the second connecting line and the plane on which the substrate is located smaller than the included angle between the first connecting line and the plane on which the substrate is located, it is ensured that the edge of the first electrode formed by evaporation is overlapped and connected to the first portion. [Brief explanation of the drawings]

[0022] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the drawings, in which like or similar reference numerals represent like or similar features and in which the drawings are not drawn to scale.

[0023] [Figure 1] FIG. 2 is a partial plan view of a display panel according to an embodiment of the present invention. [Figure 2] FIG. 2 is a partial cross-sectional view of a display panel according to an embodiment of the present application. [Figure 3] FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 4] FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 5] FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 6]FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 7] FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 8] FIG. 10 is a partial cross-sectional view of a display panel according to another embodiment of the present invention. [Figure 9] 1A to 1C are diagrams illustrating steps in a method for manufacturing a display panel according to an embodiment of the present application. [Figure 10] 1A to 1C are diagrams illustrating steps in a method for manufacturing a display panel according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0024] The features and exemplary embodiments of each aspect of the present application will be described in detail below. In order to make the objectives, technical solutions, and advantages of the present application more clearly understood, the present application will be described in more detail below with reference to the drawings and specific embodiments. It can be understood that the specific embodiments described herein are merely configured to explain the present application, and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely provided to illustrate examples of the present application and to provide a better understanding of the present application.

[0025] It should be noted that, in this specification, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another and do not necessarily require or imply that such an actual relationship or order exists between those entities or operations. Furthermore, the terms "comprises," "having," or any other variations thereof are intended to cover a non-exclusive inclusion. A process, method, article, or device that includes a set of elements not only includes those elements, but also other elements not expressly listed or that are inherent in such process, method, article, or device. Absent more limitations, an element defined by the phrase "comprises" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0026] As will be understood, when describing the structure of a component, a reference to a layer or region being "on" or "above" another layer or region may refer to being directly on top of the other layer or region, or may include other layers or regions between the other layer or region, and when the component is inverted, the layer or region would be "below" or "underneath" the other layer or region.

[0027] In order to solve the above problems, embodiments of the present application provide a display panel and a display device. Hereinafter, each embodiment of the display panel and the display device will be described with reference to the drawings.

[0028] The embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device. Hereinafter, each embodiment of the display panel, the method for manufacturing a display panel, and the display device will be described with reference to FIGS.

[0029] 1 and 2, the display panel includes a substrate 1, an isolation structure 3, a light-emitting functional layer, and a plurality of first electrodes 2; the isolation structure 3 is disposed on one side of the substrate 1, and the isolation structure 3 surrounds a plurality of limiting openings 33, the plurality of limiting openings 33 including a first opening 331 and a second opening 332; the isolation structure 3 includes a first portion 31 and a second portion 32 disposed in a stacked manner, the first portion 31 being disposed on a side closer to the substrate 1 than the second portion 32, and the orthogonal projection of the first portion 31 on the substrate 1 is located within the orthogonal projection of the second portion 32 on the substrate 1; the second portion 32 includes a blocking edge 321, and the orthogonal projection of the blocking edge 321 on the substrate 1 is located at the edge of the orthogonal projection of the second portion 32 on the substrate 1; the blocking edge 321 includes a first edge 322 that defines the first opening 331 and a second edge 323 that defines the second opening 332; the light-emitting functional layer is formed by a plurality of first light-emitting portions 41 and a plurality of second light-emitting portions 42. and a plurality of second light-emitting portions 42, at least a portion of the first light-emitting portion 41 being provided within the first opening 331, and at least a portion of the second light-emitting portion 42 being provided within the second opening 332, the wavelength of the light wave emitted by the first light-emitting portion 41 being different from the wavelength of the light wave emitted by the second light-emitting portion 42; the first electrode 2 being located on a side of the light-emitting functional layer away from the substrate 1, and an edge of the first electrode 2 being overlapped and connected to a side surface of the first portion 31 facing the limiting opening 33, The first electrode 2 includes a first electrode portion 21 provided on one side of the first light-emitting portion 41 and a second electrode portion 22 provided on one side of the second light-emitting portion 42, the shortest connecting line between the edge of the first electrode portion 21 and the first edge 322 is a first connecting line, the shortest connecting line between the edge of the second electrode portion 22 and the second edge 323 is a second connecting line, and the included angle θ2 between the second connecting line and the plane on which the substrate 1 is located is smaller than the included angle θ1 between the first connecting line and the plane on which the substrate 1 is located. Here, the shortest connecting line between the edge of the first electrode portion 21 and the first edge 322 refers to the connecting line between the edge of the first electrode portion 21 and the corresponding first edge 322 in a cross-sectional view perpendicular to the plane on which the substrate 1 is located. The shortest connecting line between the edge of the second electrode portion 22 and the second edge 323 refers to the connecting line between the edge of the second electrode portion 22 and the corresponding second edge 323 in a cross-sectional view perpendicular to the plane on which the substrate 1 is located.

[0030] The present embodiment provides a display panel based on organic light-emitting diode (OLED) technology. In the display panel according to the embodiment, the substrate 1 not only provides support for the isolation structure 3 but also provides an electrical signal to the first electrode 2. The substrate 1 may be mounted in various ways. In some embodiments, the substrate 1 may include a base 11 and an array substrate 13 disposed on the base 11. The array substrate 13 may include a pixel driving circuit, a first conductive layer, a second conductive layer, a third conductive layer, and a fourth conductive layer, which are stacked together. Exemplarily, the pixel driving circuit disposed on the array substrate 13 includes a transistor and a storage capacitor. The transistor includes an active layer 131, a gate electrode 132, a drain electrode 133, and a source electrode 137. The storage capacitor includes a first electrode plate 135 and a second electrode plate 136. For example, the gate electrode 132 and the first electrode plate 135 may be located on the third conductive layer, the second electrode plate 136 may be located on the second conductive layer, and the drain electrode 133 and the source electrode 137 may be located on the first conductive layer.

[0031] As can be understood by those skilled in the art, in order for a display panel to emit light of different colors, it is necessary to fabricate light-emitting units for emitting different colors, with isolation structures 3 spaced apart between each light-emitting unit. The light-emitting units for different colors can be fabricated in stages, i.e., first fabricating a plurality of first light-emitting units 41 for emitting light of a first color, followed by fabricating a plurality of second light-emitting units 42 for emitting light of a second color, thereby completing the fabrication of light-emitting units for emitting light of different colors. The light-emitting units for emitting different colors in this application include the first light-emitting units 41 and the second light-emitting units 42, where "first" and "second" are used for distinction purposes only and do not necessarily require or imply that the light-emitting functional layer of the technical solution of this application consists of two light-emitting units of different colors, i.e., the first light-emitting units 41 and the second light-emitting units 42. The technical solution of this application may also include light-emitting units for emitting third, fourth, fifth, etc. colors. It can be understood that the wavelengths of the light waves emitted by the first light-emitting unit 41 and the second light-emitting unit 42 are different, and the colors of the first colored light emitted by the first light-emitting unit 41 and the second colored light emitted by the second light-emitting unit 42 are different.

[0032] The isolation structure 3 is formed around the limiting opening 33 to limit the installation area of ​​the light-emitting functional layer. The isolation structure 3 includes a first portion 31 and a second portion 32 stacked one upon the other. The orthogonal projection of the first portion 31 on the substrate 1 is located within the orthogonal projection of the second portion 32 on the substrate 1. The cross-sectional area of ​​one end of the isolation structure 3 away from the substrate 1 is large, and the cross-sectional area of ​​one end of the isolation structure 3 closer to the substrate 1 is small. The second portion 32 completely shields the first portion 31 along the direction from the isolation structure 3 to the substrate 1. The number of limiting openings 33 may correspond one-to-one to the number of light-emitting portions. If the light-emitting functional layer has multiple types of light-emitting portions, the multiple limiting openings 33 may include openings corresponding one-to-one to each type of light-emitting portion. The shapes and dimensions of the first openings 331 and the second openings 332 may or may not be the same.

[0033] When manufacturing the light-emitting section, the luminescent material A for manufacturing the first light-emitting section 41 may be coated on the isolation structure 3 using a vapor deposition technique. Because the second section 32 shields the first section 31, a large step occurs at the blocking edge 321 of the second section 32, making it difficult for the luminescent material A that falls into the limiting opening 33 to connect with the luminescent material A that falls on the second section 32, resulting in breakage and forming separate luminescent materials A in adjacent limiting openings 33. If necessary, the luminescent material A that falls on the second section 32 and the luminescent material A that falls into limiting openings 33 other than the first opening 331 (for example, the luminescent material A that falls into the second opening 332) can be removed. The luminescent material B for manufacturing the second light-emitting section 42 may be coated on the isolation structure 3 using a vapor deposition technique. Similarly, because the second portion 32 shields the first portion 31, a large step occurs in the luminescent material B for manufacturing the second light-emitting portion 42 at the blocking edge 321 of the second portion 32, making it difficult for the luminescent material B that has fallen into the limiting opening 33 and the luminescent material B that has fallen on the second portion 32 to connect, resulting in breakage and the formation of separated luminescent material B in adjacent limiting openings 33. If necessary, the luminescent material B that has fallen on the second portion 32 and the luminescent material B that has fallen on limiting openings 33 other than the second opening 332 (for example, the luminescent material B that has fallen on the first opening 331) can be removed. In this manner, luminescent portions capable of emitting different colors are successively manufactured until a light-emitting functional layer having multiple types of luminescent portions is completed.

[0034] Therefore, compared with the related art in which a light-emitting functional layer is manufactured by mask deposition, the present application can manufacture a light-emitting portion located within the limiting opening 33 without using a mask by providing the first portion 31 and the second portion 32, thereby saving the cost of manufacturing a mask. Compared to manufacturing a high-precision mask, directly manufacturing a high-precision isolation structure 3 is easier to achieve, which reduces the requirements for the manufacturing process of the display panel structure of the present application and improves the consistency of the manufactured display panel.

[0035] When manufacturing the first electrode 2, the conductive material C for manufacturing the first electrode 2 may be coated on the isolation structure 3 and the light-emitting functional layer using a vapor deposition technique. The conductive material C for manufacturing the first electrode 2 has a large step at the blocking edge 321, which makes it difficult for the conductive material C that falls into the limiting opening 33 to connect with the conductive material C that falls into the second portion 32, resulting in breakage and forming spaced-apart first electrodes 2. The conductive material C that falls into the second portion 32 can be removed as needed. At least a portion of the first electrode 2 is located within the limiting opening 33. When the first portion 31 is at least partially conductive, the first electrode 2 can be connected to the conductive region of the first portion 31 to supply power to the first electrode 2. At the same time, by realizing the conductivity of adjacent first electrodes 2, a fully conductive surface electrode can be formed.

[0036] When one or more types of light-emitting portions are manufactured, unnecessary light-emitting material and conductive material in some of the limiting openings 33 must be removed before re-evaporating the light-emitting portions. During this process, the first portions 31 in contact with the removed light-emitting material and conductive material may be corroded, resulting in a reduction in the size of the first portions 31. In the embodiment provided herein, the first electrodes 2 located in different light-emitting portions are formed by deposition at different deposition angles, so that the conductive material C that will later form the first electrodes 2 can penetrate the second light-emitting portions 42 into the limiting openings 33 and be overlapped and connected to the reduced-size first portions 31. The manufactured display panel exhibits an included angle θ2 between the second connecting line and the plane on which the substrate 1 is located that is smaller than the included angle θ1 between the first connecting line and the plane on which the substrate 1 is located. As shown in Figure 2, dashed line L1 indicates a reference line parallel to the plane on which substrate 1 is located, and the vertices of included angles θ1 and θ2 are both connection points between the surface of first electrode 2 away from substrate 1 and first portion 31, with θ2<θ1.

[0037] For example, luminescent material A of the first light-emitting portion 41 is deposited in both the first opening 331 and the second opening 332, and conductive material C is deposited at a first deposition angle to form a layer of conductive material C on the luminescent material A. The luminescent material A and conductive material C located in the second opening 332 are removed, and the first portion 31 defining the second opening 332 is partially etched by the removal process, thereby reducing the angle between the shortest connection line from the edge of the partially etched first portion 31 closest to the substrate 1 to the blocking edge 321 and the plane on which the substrate 1 is located. Luminescent material B of the second light-emitting portion 42 is deposited in the second opening 332, and conductive material C is deposited at a second deposition angle. The second deposition angle is greater than the first deposition angle, ensuring that the conductive material C in the second opening 332 is overlapped and connected to the first portion 31.

[0038] In the technical solution of the present application, the provision of the isolation structure 3 allows the light-emitting portion and first electrode 2, at least a portion of which is located within the limiting opening 33, to be manufactured without using a metal mask, thereby eliminating the process and cost of using a metal mask, optimizing the display panel manufacturing process, improving the production efficiency of the display panel, and reducing the production cost of the display panel. The included angle θ2 between the second connecting line and the plane on which the substrate 1 is located is set to be smaller than the included angle θ1 between the first connecting line and the plane on which the substrate 1 is located, thereby ensuring that the edge of the first electrode 2 formed by evaporation is overlapped and connected to the first portion 31.

[0039] As shown in FIG. 1, in some alternative embodiments, the isolation structures 3 extend in a grid pattern along a first direction X and a second direction Y, and the first direction X and the second direction Y intersect.

[0040] The lattice-shaped isolation structure 3 means that the isolation structure 3 extends in the first direction X and the second direction Y, and the portions extending in the first direction X and the portions extending in the second direction Y intersect and connect to form a plurality of lattice spaces, the substrate 1 is exposed from the lattice spaces, and the second electrode 5 and the light-emitting functional layer can be located within the lattice spaces, realizing the isolation structure 3 surrounding the second electrode 5 and the light-emitting functional layer, i.e., the second electrode 5, the light-emitting functional layer, and the first electrode 2 are all separated by the isolation structure 3 in the first direction X and the second direction Y. Note that the orthogonal projection of the isolation structure 3 on the substrate may be an independent ring, and this is not a limitation.

[0041] Referring to Figure 3, in some embodiments, the multiple limiting openings 33 further include a third opening 333, the light-emitting functional layer further includes a multiple number of third light-emitting sections 43, at least a portion of the third light-emitting sections 43 are disposed within the third openings 333, and the blocking edge further includes a third edge 324 that defines the third openings 333.

[0042] The plurality of first electrodes 2 includes a third electrode unit 23 provided on one side of the third light-emitting unit 43, and the shortest connecting line between the edge of the third electrode unit 23 and the third edge 324 is a third connecting line, and the included angle θ3 between the third connecting line and the plane on which the substrate 1 is located is smaller than the included angle θ2 between the second connecting line and the plane on which the substrate 1 is located. Here, the shortest connecting line between the edge of the third electrode unit 23 and the third edge 324 refers to the connecting line between the edge of the third electrode unit 23 and the corresponding third edge 324 in a cross-sectional view perpendicular to the plane on which the substrate 1 is located. Note that the connecting line referred to in this application always refers to a straight line.

[0043] The wavelengths of the light waves emitted by the first light-emitting portion 41, the second light-emitting portion 42, and the third light-emitting portion 43 may be different, and the first light-emitting portion 41, the second light-emitting portion 42, and the third light-emitting portion 43 may be a red light-emitting portion that emits red light, a green light-emitting portion that emits green light, and a blue light-emitting portion that emits blue light, respectively. During manufacturing, the first light-emitting portion 41, the second light-emitting portion 42, and the third light-emitting portion 43 may be manufactured by sequentially depositing the first electrode 2 stacked with the first light-emitting portion 41, the first electrode 2 stacked with the second light-emitting portion 42, and the first electrode 2 stacked with the third light-emitting portion 43, at a gradually increasing deposition angle, so that the manufactured first electrode 2 exhibits θ3<θ2<θ1.

[0044] The first portion 31 and the second portion 32 may be an integrally molded structure, or the first portion 31 and the second portion 32 may be a layered structure manufactured by laminating the same material or different materials.

[0045] For example, the first portion 31 and the second portion 32 are an integrally molded structure. When manufacturing the isolation structure 3, a material D for manufacturing the isolation structure 3 is first applied to the substrate 1, and then a patterning process is performed on the material D to simultaneously form the first portion 31 and the second portion 32 that shields the first portion 31. In a cross-sectional structural view along the direction from the substrate 1 to the light-emitting functional layer, the cross section of the isolation structure 3 may be a trapezoid whose upper and lower sides face the substrate 1.

[0046] 3 , the first portion 31 and the second portion 32 have a layer structure manufactured by laminating layers. When manufacturing the isolation structure 3, first, a material E for manufacturing the first portion 31 is applied to the substrate 1, then a material F for manufacturing the second portion 32 is applied to the material E for manufacturing the first portion 31, and then a patterning process is performed on materials E and F to form the first portion 31 and the second portion 32 that shields the first portion 31.

[0047] Referring to FIG. 4, in some embodiments, the minimum distance from the orthographic projection of the first edge 322 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H1, the minimum distance from the orthographic projection of the second edge 323 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H2, and H1 < H2.

[0048] When manufacturing the display panel, first, the first light-emitting portion 41 and the first electrode 2 located in the first opening 331 can be manufactured, and then the second light-emitting portion 42 and the first electrode 2 located in the second opening 332 can be manufactured. When the above manufacturing process is adopted, since the first light-emitting portion 41 is manufactured first, after removing the light-emitting material and the conductive material located in the second opening 332, the side surface of the first portion 31 defining the second opening 332 is partially corroded, presenting H1 < H2.

[0049] When the light-emitting functional layer includes the third light-emitting portion 43, the blocking edge 321 includes the third edge 324 defining the third opening 333, and the minimum distance from the orthographic projection of the third edge 324 on the substrate 1 to the orthographic projection of the first portion 31 on the substrate 1 is H3, and H1 < H2 < H3.

[0050] Referring to FIG. 5, in some embodiments, along the direction perpendicular to the plane where the substrate 1 is located, the cross-section of the second portion 32 is trapezoidal.

[0051] Optionally, the cross-section of the second portion 32 is a trapezoid with the lower base facing the substrate 1. Thereby, the second portion 32 has a sloped surface, which is advantageous for the manufacturing material to be cut by the blocking edge 321, forming a state where part of the manufacturing material is located in the second portion 32 and part of the manufacturing material is located in the limited opening 33. Referring to FIG. 6, the cross-section of the second portion 32 is a trapezoid with the upper base facing the substrate 1. The first edge 322 and the second edge 323 are respectively located at the connection points of the lower base and the side of the trapezoidal cross-section.

[0052] The cross section of the second portion 32 may have other structures. Referring to Figure 7, the cross section of the second portion 32 in this embodiment is hexagonal, and the first edge 322 and the second edge 323 are located at the connection points of both sides of the hexagonal cross section.

[0053] Referring to FIG. 5, in some embodiments, the area of ​​the orthogonal projection of the surface of the second portion 32 away from the substrate 1 on the substrate 1 is smaller than the area of ​​the orthogonal projection of the surface of the second portion 32 closer to the substrate 1 on the substrate 1.

[0054] The second portion 32 extends outward from the first portion 31 by a predetermined distance, i.e., the area of ​​the orthogonal projection of the surface of the second portion 32 away from the substrate 1 on the substrate 1 is smaller than the area of ​​the orthogonal projection of the surface of the second portion 32 closer to the substrate 1 on the substrate 1, so that the second portion 32 has an inclined slope structure and defines the pattern of the light-emitting functional layer by the second portion 32.

[0055] If the cross section of the second portion 32 is trapezoidal and the surface of the second portion 32 away from the substrate 1 is smaller than the surface of the second portion 32 closer to the substrate 1, the blocking edge 321 is the periphery of the surface of the second portion 32 closer to the substrate 1.

[0056] In some alternative embodiments, the first portion 31 may include a single layer metal structure, for example, the first portion 31 may include only one layer of aluminum, the side of which may be connected to the first electrode 2 .

[0057] Alternatively, according to actual needs, the first portion 31 may include a multi-layer metal structure. For example, referring to FIG. 7, the first portion 31 may include a first subsection 311 and a second subsection 312 stacked together, the first subsection 311 including molybdenum and / or titanium, and the second subsection 312 including aluminum. The first electrode 2 may be connected to at least one of the first subsection 311 and the second subsection 312 in an overlapping manner, thereby ensuring that adjacent first electrodes 2 are electrically connected via the isolation structure 3.

[0058] Optionally, molybdenum and titanium have a low etching rate, which allows the first subsection 311 to extend outward relative to the second subsection 312, resulting in a trapezoidal cross section of the first portion 31, which is easy to overlap and connect with the first electrode 2 formed by evaporation. If both the first subsection 311 and the second portion 32 are made of titanium metal, the manufacturing process can be simplified.

[0059] In some alternative embodiments, the area of ​​the orthogonal projection of the surface of the second portion 32 facing the substrate 1 on the substrate 1 is larger than the area of ​​the orthogonal projection of the surface of the first portion 31 facing away from the substrate 1 on the substrate 1. That is, the second portion 32 extends outward relative to the first portion 31 so that the second portion 32 limits the patterns of the first electrode 2 and the light-emitting functional layer. The area of ​​the second portion 32 is larger than the area of ​​the first portion 31 and is provided to completely cover the first portion 31, with the first portion 31 recessed in a direction away from the limiting opening 33 relative to the second portion 32. During manufacturing of the second electrode 5, a large step is generated at the edge of the isolation structure 3 and the first portion 31 is recessed, making it difficult for the second electrode 5 to connect to the outside of the isolation structure 3, thereby forming second electrodes 5 that are broken and separated from each other.

[0060] In some alternative embodiments, the cross section of the first portion 31 along a direction perpendicular to the plane in which the substrate 1 lies is trapezoidal.

[0061] The cross section of the first portion 31 is an isosceles trapezoid, which increases the contact area between the first electrode 2 and the first portion 31 and ensures the stability of the overlap connection when the first electrode 2 is overlap-connected to the first portion 31. When the cross section of the first portion 31 is an isosceles trapezoid, it can stably support the second portion 32, while reducing the contact area between the first subsection 311 and the second portion 32 allows the first portion 31 to be recessed from the second portion 32 in a direction away from the central axis of the limiting opening 33, allowing the second electrode 5 and the light-emitting functional layer to be cut at the position of the isolation structure 3.

[0062] In these alternative embodiments, during the etching process to obtain the recessed first portion 31, the second subsection 312 has a faster etching rate than the first subsection 311 and / or the second portion 32, thereby forming the recessed first portion 31. Because the etching rate of the second subsection 312 is fast, waste generated by etching is likely to enter other positions on the display panel and cause adverse effects. By arranging the second subsection 312 so that its orthogonal projection on the substrate 1 is located within the orthogonal projection of the first subsection 311 on the substrate 1, the second subsection 312 is well supported by the first subsection 311, and the generated etching waste falls onto the first subsection 311, making it easy to clean.

[0063] Optionally, the orthogonal projection of the second portion 32 on the substrate 1 overlaps with the orthogonal projection of the first subsection 311 on the substrate 1. The first subsection 311 and the second portion 32, which have the same area, can be etched using the same mask, simplifying the manufacturing process.

[0064] Referring to Figure 8, in some embodiments, the display panel further includes a pixel definition layer 6 disposed between the substrate 1 and the isolation structure 3, the pixel definition layer 6 including a pixel aperture, the orthogonal projection of the pixel aperture on the substrate 1 being located within the range of the orthogonal projection of the limiting aperture 33 on the substrate 1.

[0065] In this embodiment, the pixel defining layer 6 is disposed on the substrate 1 and includes a pixel opening, and at least a part of the light-emitting functional layer is disposed within the pixel opening to realize the light-emitting display of the display panel.

[0066] The isolation structure 3 is provided directly on the side of the pixel definition layer 6 facing away from the substrate 1 and can be supported by the pixel definition layer 6 .

[0067] In some embodiments, the orthogonal projection of the pixel opening on the substrate 1 is located within the range of the orthogonal projection of the limiting opening 33 on the substrate 1. By limiting the area of ​​the limiting opening 33 to be larger than the area of ​​the pixel opening, the influence of the isolation structure 3 on the light output viewing angle of the light-emitting functional layer can be reduced.

[0068] In some embodiments, a plurality of pixel openings are distributed at intervals, and each pixel opening has a light-emitting functional layer therein.

[0069] In some embodiments, the substrate 1 further includes a planarization layer 12 that supports the pixel definition layer 6 and provides a manufacturing plane for the pixel definition layer 6 to facilitate manufacturing of the pixel definition layer 6. The material of the planarization layer 12 may be hexamethyldisiloxane, epoxy resin, or polyimide, or may be other inorganic materials, and is not limited in this embodiment.

[0070] The isolation structure 3 of the present application may be provided directly on the planarization layer 12, and is provided as needed, and is not limited in this application.

[0071] In some embodiments, the display panel further includes a plurality of second electrodes 5. The plurality of second electrodes 5 may be spaced apart, and the second electrodes 5, the light-emitting functional layer, and the first electrode 2 are stacked in this order along the direction from the substrate 1 to the light-emitting functional layer. The plurality of second electrodes 5 form a plurality of point electrodes, and different electrical signals can be input to the plurality of second electrodes 5 to control whether the light-emitting functional layer in contact with the second electrode 5 emits light and the duration of light emission.

[0072] One of the second electrode 5 and the first electrode 2 can be an anode electrode and the other can be a cathode electrode. The second electrode 5, the light-emitting functional layer, and the first electrode 2 are stacked in this order and in contact with each other, thereby realizing electrical conduction among the second electrode 5, the light-emitting functional layer, and the first electrode 2. Optionally, the second electrode 5 is an anode electrode, and the first electrode 2 is a cathode electrode.

[0073] In the examples of the present application, the second electrode 5 is an anode and the first electrode 2 is a cathode. The light-emitting functional layer may include one or more of an electron injection layer, an electron transport layer, a light-emitting material layer, a hole-blocking layer, an electron blocking layer, a hole-transport layer, and a hole-injection layer. Specifically, these layers may be selected depending on the specific type of light-emitting functional layer, and are not particularly limited. The electron injection layer, the electron transport layer, and the hole-blocking layer may be provided between the second electrode 5 and the light-emitting material layer. The electron blocking layer, the hole-transport layer, and the hole-injection layer may be provided between the first electrode 2 and the light-emitting material layer.

[0074] The material of the second electrode 5 is generally a material with a high work function to improve hole injection efficiency, and may be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (e.g., polyaniline), etc. For example, the second electrode 5 may be made of an ITO-Ag-ITO composite material, but is not particularly limited thereto.

[0075] The material of the first electrode 2 may be one of metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), or may be an alloy of the metal materials, such as a magnesium-silver alloy (Mg / Ag) or a lithium-aluminum alloy (Li / Al), but this embodiment is not limited thereto.

[0076] In some embodiments, the display panel further includes a first packaging layer 71, which covers the side of the first electrode 2 away from the substrate 1 and contacts the side wall of the isolation structure 3 facing the limiting opening 33. The first packaging layer 71 can block water vapor and the like from entering the light-emitting functional layer, and can also prevent or reduce damage to the light-emitting functional layer due to external mechanical forces, thereby improving the reliability of the display panel.

[0077] In some embodiments, the display panel further includes a second package layer 72 located on the side of the first package layer 71 away from the substrate 1 and a third package layer 73 located on the side of the second package layer 72 away from the substrate 1. The first package layer 71, the second package layer 72, and the third package layer 73 may be made of inorganic and / or organic materials. The inorganic materials may be, for example, silicon nitride, silicon oxide, or silicon oxynitride, and may be formed using a CVD (Chemical Vapor Deposition) process. The organic materials may be made of resin or polymer organic materials and may be formed using an IJP (Inkjet Printing) process. Optionally, the first package layer 71 and the third package layer 73 are made of inorganic materials, and the second package layer 72 is made of an organic material.

[0078] An embodiment of the present application further provides a method for manufacturing a display panel, including the following steps.

[0079] In S110, a substrate is provided.

[0080] In S120, an isolation structure is formed on one side of the substrate, the isolation structure surrounding a plurality of limiting openings, the limiting openings including first and second openings, the isolation structure including a first portion and a second portion stacked one upon the other, the first portion being located on one side closer to the substrate of the second portion, the orthogonal projection of the first portion on the substrate being located within the orthogonal projection of the second portion on the substrate, the second portion including a blocking edge, the orthogonal projection of the blocking edge on the substrate being located at the edge of the orthogonal projection of the second portion on the substrate, and the blocking edge including a first edge defining the first opening and a second edge defining the second opening.

[0081] In S130, a light-emitting functional layer and a first electrode are formed, the light-emitting functional layer including a plurality of first light-emitting portions and a plurality of second light-emitting portions, at least a portion of the first light-emitting portions being disposed within the first opening, and at least a portion of the second light-emitting portions being disposed within the second opening; the plurality of first electrodes including second electrode portions disposed on one side of the first electrode portions and the second light-emitting portions, the shortest connecting line between the edge of the first electrode portion and the first edge is a first connecting line, the shortest connecting line between the edge of the second electrode portion and the second edge is a second connecting line, and the included angle between the second connecting line and a plane on which the substrate is located is smaller than the included angle between the first connecting line and the plane on which the substrate is located.

[0082] The manufacturing method of the display panel according to the embodiment of the present invention is as follows.

[0083] In S110, the substrate can be formed by processes such as coating, curing, and film formation. The substrate may be a rigid substrate, such as a glass substrate, or a flexible substrate, and its material may be polyimide, polystyrene, polyethylene terephthalate, polyparaxylylene, polyethersulfone, or polyethylene naphthalate. The substrate is mainly used to support the device provided thereon.

[0084] In S120, to form the isolation structure, as shown in (b) of FIG. 9, first, a first partial material layer 310 and a second partial material layer 320 are sequentially formed on one side of the substrate, and then, as shown in (c) of FIG. 9, the second partial material layer 320 is etched to form the second portion 32 and the first portion 31.

[0085] Specifically, the first portion material layer 310 and the second portion material layer 320 can be etched and removed, respectively, using at least one process of dry etching or wet etching, and as can be understood, etching using an etching solvent corresponding to the specific materials of the first portion material layer 310 and the second portion material layer 320 is not particularly limited.

[0086] In S130, the film layers of the light-emitting functional layer, such as the electron injection layer, electron transport layer, hole blocking layer, light-emitting material layer, electron blocking layer, hole transport layer and hole injection layer, and the first electrode can be formed by a vapor deposition process.

[0087] In some embodiments, S130 includes the following steps:

[0088] In S210, a first luminescent material is placed in each limiting opening, and a first conductive material is deposited at a first deposition angle, and the first conductive material is stacked on one side of the first luminescent material.

[0089] In S220, a removal process is performed on the first light-emitting material and the first conductive material in the second opening, so that the second electrode is exposed through the limited opening, and the second electrode is located on the side of the light-emitting functional layer closer to the substrate.

[0090] In S230, a second luminescent material is placed in each limiting opening, and a second conductive material is deposited at a second deposition angle, the second conductive material is stacked on one side of the second luminescent material, and the first deposition angle is smaller than the second deposition angle.

[0091] In S240, a removal process is performed on the second light-emitting material and the second conductive material in the first opening.

[0092] In the embodiment of the present application, the first light-emitting portion and the first electrode portion are first manufactured, and then the second light-emitting portion and the second electrode portion are manufactured, and the first electrode portion and the second electrode portion are formed by depositing them at different deposition angles. This avoids the technical problem of poor overlapping connection between the later-manufactured first electrode and the first portion, which occurs when a portion of the first portion is corroded by the removal process in S220 and the first electrode is formed by depositing them at the same deposition angle. By depositing the first electrode portion and the second electrode portion at different deposition angles, the edges of the first portion and the first electrode are overlapped and connected, improving the yield rate of display panels.

[0093] The first conductive material in S210 and the second conductive material in S230 can be the same material, simplifying the manufacturing process. The first light-emitting material and the first conductive material located in the first opening form the first light-emitting portion and the first electrode portion, respectively, and the second light-emitting material and the second conductive material located in the second opening form the second light-emitting portion and the second electrode portion, respectively. When there are light-emitting portions emitting two or more different colors, referring to S210-S240, different light-emitting materials are deposited in the third, fourth, fifth, etc. openings in a stepwise manner, and conductive materials are deposited at gradually increasing deposition angles, and one light-emitting material and conductive material are retained in the limited openings by a removal process.

[0094] In some embodiments, after S210, the method may further include covering the side of the first conductive material away from the substrate with a first packaging material.

[0095] S220 includes performing a removal process on the first packaging material, the first light-emitting material, and the first conductive material in the second opening to expose the second electrode through the limited opening.

[0096] After S230, the method may further include covering the side of the second conductive material away from the substrate with a second packaging material.

[0097] S240 includes performing a removal process on the second light-emitting material, the second conductive material, and the second packaging material located on the side of the first conductive material away from the substrate.

[0098] 9A, for example, a second electrode 5 and a pixel defining layer 6 are provided on a substrate 1, and the second electrode 5 is exposed from the pixel defining layer 6. As shown in FIG. 9B, for convenience of illustration, the substrate 1 is not shown in FIG. 9B. A first portion material layer 310 and a second portion material layer 320 are provided on the substrate 1 to cover the second electrode 5 and the pixel defining layer 6. As shown in FIG. 9C, the first portion material layer 310 and the second portion material layer 320 are patterned to obtain an isolation structure 3, where the first portion material layer 310 provided on the substrate 1 forms a first portion 31, and the second portion material layer 320 provided on the substrate 1 forms a second portion 32. The orthogonal projection of the first portion 31 of the isolation structure 3 on the substrate 1 is located within the orthogonal projection of the second portion 32 on the substrate 1, and the isolation structure 3 forms a plurality of limiting openings 33 surrounding the isolation structure 3, and the second electrode 5 is exposed from the limiting openings 33. The connecting line from the end edge of the first portion 31 connected to the pixel definition layer 6 to the blocking edge is used as the reference line, and the dashed line L2 in Figure 9(c) indicates the plane on which the pixel definition layer 6 is located. The included angle between this plane and the reference line is α, and the degrees of the included angle α corresponding to each first portion 31 are approximately the same. For example, as shown in Figure 9(c), α1 = α2.

[0099] Referring to FIG. 10(a), a first luminescent material, a first conductive material, and a first packaging material are sequentially deposited, where the first conductive material is deposited at a first deposition angle β1 to form the first electrode portion 21. A luminescent material layer, a conductive material layer, and a packaging material layer are formed within each of the limited openings 33, including the first opening 331 and the second opening 332. A portion of the first luminescent material, the first conductive material, and the first packaging material are deposited on the second portion 32. At this stage, α1 remains equal to α2. As shown in FIG. 10(b), a removal process is performed on the first luminescent material, the first conductive material, and the first packaging material within the second opening 332 and on the second portion 32, exposing a portion of the second electrode 5 through the second opening 332. The removal process may be etching. When the first luminescent material, the first conductive material, and the first packaging material within the second opening 332 are etched, a portion of the first portion 31 is etched, such that α1 > α2. As shown in Figure 10(c), a second luminescent material, a second conductive material, and a second packaging material are sequentially deposited, where the second conductive material is deposited at a second deposition angle β2 to form the second electrode portion 22, where β2 > β1. A second luminescent material layer, a second conductive material layer, and a second packaging material layer are formed within each of the multiple limiting openings 33, including the first opening 331 and the second opening 332. A portion of the second luminescent material, the second conductive material, and the second packaging material are deposited on the second portion 32, such that the included angle θ2 between the second connecting line and the plane on which the substrate 1 is located is smaller than the included angle θ1 between the first connecting line and the plane on which the substrate 1 is located. As shown in Figure 10(d), the second luminescent material, the second conductive material, and the second packaging material within the first opening 331 and on the second portion 32 are removed. The first light-emitting material in the first opening 331 forms the first light-emitting portion 41, the first conductive material forms the first electrode portion 21, and the first packaging material forms the first packaging layer 71 located on one side of the first electrode portion 21; the second light-emitting material in the second opening 332 forms the second light-emitting portion 42, the second conductive material forms the second electrode portion 22, and the second packaging material forms the first packaging layer 71 located on both sides of the second electrode portion 22.As shown in (e) of Figure 10, after the light-emitting functional layer, the first electrode, and the first package layer 71 are manufactured, a third package material and a fourth package material are provided to cover the first package layer 71, thereby forming a second package layer 73 and a third package layer 74, respectively.

[0100] An embodiment of a third aspect of the present application further provides a display device including the display panel of any of the above-mentioned embodiments of the first aspect, or the display panel manufactured by any of the above-mentioned embodiments of the second aspect. Because the display device according to the embodiment of the third aspect of the present application includes the display panel of any of the above-mentioned embodiments of the first or second aspect, the display device according to the embodiment of the third aspect of the present application has the beneficial effects of the display panel of any of the above-mentioned embodiments of the first or second aspect, and description thereof will be omitted here.

[0101] The display device according to the embodiments of the present application may be applied to a mobile phone or any electronic product having a display function, including, but not limited to, a television, a laptop, a desktop display, a tablet PC, a digital camera, a smart bracelet, smart glasses, an in-vehicle display, a medical device, an industrial control device, a touch interaction terminal, etc., and the embodiments of the present application are not particularly limited thereto.

[0102] The above are only specific embodiments of the present application, and those skilled in the art can understand that for the sake of convenience and conciseness, the specific operation processes of the above-described systems, modules, and units can refer to the corresponding processes in the above method examples, and will not be described here. It should be understood that the scope of protection of the present application is not limited thereto, and those skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and all of these modifications or replacements should be included in the scope of protection of the present application.

[0103] It should be noted that the exemplary embodiments referred to in this application describe some methods or systems based on a sequence of steps or devices, but the application is not limited to the order of the steps described above, i.e., steps may be performed in the order described in the embodiments, or may be performed in a different order than in the embodiments, or multiple steps may be performed simultaneously. [Explanation of symbols]

[0104] 1 board 11 base 12 Planarization layer 13 Array board 131 active layer 132 gate electrode 133 Drain electrode 137 Source electrode 135 1st plate 136 2nd plate 2 1st electrode 21 1st electrode section 22 Second electrode part 23 Third electrode part 3 Isolation structure 31 Part 1 311 First Subsection 312 Second Subsection 32 Part 2 321 Cutting Edge 33 Limited aperture 331 First Opening 332 Second Opening 333 Third Opening 41 First light-emitting part 42 Second light-emitting part 43 Third light-emitting part 5 Second electrode 6 Pixel Definition Layer 71 First Package Layer 72 Second Package Layer 73 Third Package Layer

Claims

1. A display panel comprising a substrate, an isolation structure, a light-emitting functional layer, and a plurality of first electrodes, the isolation structure is provided on one side of the substrate and surrounds a plurality of limiting openings, the plurality of limiting openings including a first opening and a second opening; the isolation structure includes a first portion and a second portion that are stacked one on top of the other; the first portion is provided on a side of the second portion closer to the substrate; an orthogonal projection of the first portion on the substrate is located within an orthogonal projection of the second portion on the substrate; the second portion includes a blocking edge, the orthogonal projection of the blocking edge on the substrate is located at an edge of the orthogonal projection of the second portion on the substrate; and the blocking edge includes a first edge that defines the first opening and a second edge that defines the second opening; the light-emitting functional layer includes a plurality of first light-emitting units and a plurality of second light-emitting units, at least a portion of the first light-emitting units being provided in the first opening, and at least a portion of the second light-emitting units being provided in the second opening; the plurality of first electrodes are located on a side of the light-emitting functional layer away from the substrate, and edges of the first electrodes are overlapped and connected to a side surface of the first portion facing the limiting opening, and the plurality of first electrodes include a first electrode portion provided on one side of the first light-emitting portion and a second electrode portion provided on one side of the second light-emitting portion, a minimum distance from an orthogonal projection of the first edge on the substrate to an orthogonal projection of the first portion on one side of the substrate toward the substrate is H1, and a minimum distance from an orthogonal projection of the second edge on the substrate to an orthogonal projection of the first portion on one side of the substrate toward the substrate is H2, and H1<H2. A display panel characterized by:

2. the plurality of limiting openings further include third openings, the light-emitting functional layer further includes a plurality of third light-emitting units, at least a portion of the third light-emitting units is disposed within the third openings, and the blocking edge further includes a third edge defining the third openings; the plurality of first electrodes include a third electrode portion provided on one side of the third light emitting portion, and a minimum distance from an orthogonal projection of the third edge on the substrate to an orthogonal projection of one side of the first portion facing the substrate is H3, and H1<H2<H3.

2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

3. a cross section of the second portion along a direction perpendicular to a plane in which the substrate lies is trapezoidal; an area of ​​an orthogonal projection of a surface of the second portion away from the substrate on the substrate is smaller than an area of ​​an orthogonal projection of a surface of the second portion close to the substrate on the substrate; the blocking edge is a periphery of a surface of the second portion that is closest to the substrate; 2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

4. a cross section of the first portion along a direction perpendicular to a plane in which the substrate lies is trapezoidal; an area of ​​an orthogonal projection of a surface of the first portion away from the substrate on the substrate is smaller than an area of ​​an orthogonal projection of a surface of the second portion close to the substrate on the substrate; 2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

5. the first portion comprises a single layer metal structure, the first portion comprising aluminum; Alternatively, the first portion includes a multi-layer metal structure, and an edge of the first electrode is overlapped and connected to the multi-layer metal structure; the first portion includes a first subsection and a second subsection that are stacked one on top of the other, the second subsection being located on a side of the first subsection that is away from the substrate, the first subsection including molybdenum and / or titanium, and the second subsection including aluminum; 2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

6. the display panel further includes a pixel definition layer disposed between the substrate and the isolation structure, the pixel definition layer including a plurality of pixel openings, the orthogonal projections of the pixel openings on the substrate being located within a range of the orthogonal projections of the limiting openings on the substrate; the isolation structure is provided on a side of the pixel definition layer away from the substrate, and the light-emitting functional layer is at least partially provided within the pixel opening; the display panel further includes a first package layer covering a side of the first electrode away from the substrate; 2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

7. providing a substrate; forming an isolation structure on one side of the substrate; forming a light-emitting functional layer and a plurality of first electrodes; the isolation structure surrounds a plurality of limiting openings, the limiting openings including a plurality of first openings and a plurality of second openings, the isolation structure includes a first portion and a second portion that are stacked one on top of the other, the first portion is provided on a side of the second portion closer to the substrate, an orthogonal projection of the first portion on the substrate is located within an orthogonal projection of the second portion on the substrate, the second portion includes a blocking edge, the orthogonal projection of the blocking edge on the substrate is located at an edge of an orthogonal projection of the second portion on the substrate, and the blocking edge includes a first edge that defines the first opening and a second edge that defines the second opening, the light-emitting functional layer includes a first light-emitting portion and a second light-emitting portion, at least a portion of the first light-emitting portion is provided in the first opening, and at least a portion of the second light-emitting portion is provided in the second opening, the first electrode is located on a side of the light-emitting functional layer away from the substrate, an edge of the first electrode is overlapped and connected to a side surface of the first portion facing the limiting opening, the plurality of first electrodes include a first electrode portion provided on one side of the first light-emitting portion and a second electrode portion provided on one side of the second light-emitting portion, a minimum distance from an orthogonal projection of the first edge on the substrate to an orthogonal projection of the first portion on the substrate on one side facing the substrate is H1, and a minimum distance from an orthogonal projection of the second edge on the substrate to an orthogonal projection of the first portion on the substrate on one side facing the substrate is H2, and H1<H2.

10. A display panel manufacturing method comprising:

8. The step of forming the light-emitting functional layer and the first electrode includes: disposing a first luminescent material in each of the limiting openings, and depositing a first conductive material at a first deposition angle, the first conductive material being stacked on one side of the first luminescent material; performing a removal process on the first light-emitting material and the first conductive material in the second opening to expose a second electrode through the limited opening, the second electrode being located on a side of the light-emitting functional layer closer to the substrate; disposing a second luminescent material in each of the limiting openings, and depositing a second conductive material at a second deposition angle, the second conductive material being stacked on one side of the second luminescent material, and the first deposition angle being smaller than the second deposition angle; performing a removal process on the second light-emitting material and the second conductive material in the first opening; 8. The method for manufacturing a display panel according to claim 7.

9. A display device comprising the display panel according to any one of claims 1 to 6 or a display panel manufactured by the method for manufacturing a display panel according to any one of claims 7 to 8.

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