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

Abstract

The application provides a display panel, a preparation method of the display panel and a display device. The display panel comprises a substrate, an insulating layer, an isolation structure and a plurality of light emitting devices. The insulating layer is located on one side of the substrate and comprises a plurality of pixel openings. The isolation structure is located on the side of the insulating layer away from the substrate and defines a plurality of isolation openings. The isolation openings are in communication with the pixel openings. The light emitting device comprises a first electrode and a light emitting functional layer which are sequentially stacked in a direction away from the substrate. The pixel opening exposes at least a part of the area of the first electrode, and the light emitting functional layer is located in the pixel opening. The insulating layer has a plurality of recessed areas. The surface of the side of the isolation structure close to the substrate is spaced apart from the projection of the recessed area on the substrate, and the projection of the recessed area on the substrate is spaced apart from the projection of the first electrode on the substrate. In this way, the occurrence rate of dark spots in the display panel is reduced, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device. BACKGROUND

[0002] With the development of display technology, display panels are more and more widely used in people's production and life. At the same time, people's requirements for display panels are also getting higher and higher. Among them, how to improve the display effect of the display panel has always been the focus of attention. SUMMARY

[0003] Therefore, the present application is committed to providing a display panel, a preparation method of the display panel and a display device, which can effectively improve the display effect of the display panel.

[0004] In a first aspect, the present application provides a display panel, comprising:

[0005] a substrate;

[0006] an insulating layer located on one side of the substrate, comprising a plurality of pixel openings;

[0007] an isolation structure located on a side of the insulating layer away from the substrate, defining a plurality of isolation openings; the isolation openings are in communication with the pixel openings;

[0008] a plurality of light emitting devices; the light emitting device comprises a first electrode and a light emitting functional layer which are sequentially stacked away from the substrate; the pixel opening exposes at least part of the area of the first electrode; the light emitting functional layer is located in the pixel opening;

[0009] the insulating layer has a plurality of recessed areas; the surface of the isolation structure close to the substrate is spaced apart from the projection of the recessed area on the substrate, and the projection of the recessed area on the substrate is spaced apart from the projection of the first electrode on the substrate.

[0010] Optionally, the recessed area has at least one through hole;

[0011] Optionally, the insulating layer comprises a pixel defining layer.

[0012] Optionally, further comprising a plurality of electrode parts located on the side of the insulating layer close to the substrate;

[0013] the insulating layer further has a plurality of first openings; the first openings are spaced apart from the recessed areas and the pixel openings; the first openings expose at least part of the area of the electrode parts; the electrode parts are in contact with the isolation structure through the first openings;

[0014] The through hole exposes at least a partial region of the corresponding electrode portion.

[0015] Optionally, the first electrode is arranged in the same layer as the electrode portion, and a projection of the first electrode on the substrate is spaced apart from a projection of the electrode portion on the substrate.

[0016] Optionally, the first electrode is made of the same material as the electrode portion.

[0017] Optionally, a projection of the electrode portion on the substrate partially overlaps a projection of the isolation structure on the substrate, and the overlapping region is a first region.

[0018] A projection of the first opening on the substrate is located in the first region.

[0019] Optionally, the light emitting device further comprises a second electrode located on a side of the light emitting functional layer away from the substrate.

[0020] The second electrode is located in the isolation opening.

[0021] Optionally, at least a part of a side edge of the second electrode overlaps a side wall of the isolation structure.

[0022] Optionally, a projection of the light emitting functional layer on the substrate is spaced apart from a projection of the through hole on the substrate.

[0023] Optionally, a projection of the light emitting functional layer on the substrate is spaced apart from a projection of the recessed region on the substrate.

[0024] Optionally, the second electrode contacts the corresponding electrode portion through the through hole.

[0025] Optionally, a projection of the second electrode on the substrate partially overlaps a projection of the corresponding electrode portion on the substrate, and the overlapping region is a second region.

[0026] A projection of the through hole on the substrate is located in the second region.

[0027] Optionally, the isolation structure comprises a first structure and a second structure arranged in sequence in a direction away from the substrate.

[0028] A projection of the second structure on the substrate covers a projection of the first structure on the substrate.

[0029] Optionally, the first structure and the second structure are made of different materials.

[0030] Optionally, the material of the second structure comprises titanium.

[0031] Optionally, the isolation structure further comprises a third structure located on the first structure close to the substrate side;

[0032] The third structure is in contact with the corresponding electrode part through the first opening;

[0033] Optionally, the third structure covers the orthographic projection of the first structure on the substrate;

[0034] Optionally, the third structure is different in material from the first structure;

[0035] Optionally, the material of the third structure comprises molybdenum;

[0036] Optionally, the material of the first structure comprises aluminum.

[0037] Optionally, further comprising a first encapsulation layer; the first encapsulation layer comprises a plurality of encapsulation parts;

[0038] The plurality of encapsulation parts are respectively located on the side of the plurality of light emitting devices away from the substrate;

[0039] Optionally, the material of the first encapsulation layer comprises inorganic material.

[0040] Optionally, further comprising a second encapsulation layer;

[0041] The second encapsulation layer is located on the side of the first encapsulation layer away from the substrate; the orthographic projection of the second encapsulation layer on the substrate covers the substrate;

[0042] Optionally, the material of the second encapsulation layer comprises organic material.

[0043] Optionally, further comprising a third encapsulation layer;

[0044] The third encapsulation layer is located on the side of the second encapsulation layer away from the substrate; the orthographic projection of the third encapsulation layer on the substrate covers the substrate;

[0045] Optionally, the material of the third encapsulation layer comprises inorganic material.

[0046] The second aspect of the present application provides a display panel, comprising:

[0047] A substrate;

[0048] A plurality of electrode parts located on one side of the substrate;

[0049] An insulating layer located on the side of the plurality of electrode parts away from the substrate, the insulating layer being provided with a plurality of first openings;

[0050] a plurality of light emitting devices; the light emitting device comprises a light emitting functional layer and a second electrode which are sequentially stacked in a direction away from the substrate;

[0051] an isolation structure located on a side of the insulating layer away from the substrate, defining a plurality of isolation openings; the light emitting functional layer and the second electrode are located in the isolation openings; the isolation structure is in contact with the second electrode through the first opening;

[0052] the insulating layer has a plurality of through holes; the through holes expose at least part of the area of the electrode part; the second electrode is in contact with the corresponding electrode part through the through hole.

[0053] Optionally, the light emitting device further comprises a first electrode located on a side of the light emitting functional layer close to the substrate;

[0054] the first electrode is disposed in the same layer as the electrode part, and the orthographic projection of the first electrode on the substrate is spaced apart from the orthographic projection of the electrode part on the substrate;

[0055] Optionally, the material of the first electrode is the same as the material of the electrode part.

[0056] Optionally, the insulating layer further comprises a plurality of pixel openings; the pixel openings are spaced apart from the through holes and the first openings;

[0057] the pixel openings expose at least part of the area of the first electrode; the pixel openings are in communication with the isolation openings; the light emitting functional layer is located in the pixel openings;

[0058] Optionally, the insulating layer comprises a pixel defining layer.

[0059] Optionally, the orthographic projection of the surface of the isolation structure close to the substrate on the substrate is spaced apart from the orthographic projection of the through hole on the substrate, and the orthographic projection of the through hole on the substrate is spaced apart from the orthographic projection of the first electrode on the substrate.

[0060] The third aspect of the present application provides a preparation method of a display panel, comprising:

[0061] providing a substrate;

[0062] forming an insulating layer, an isolation structure and a plurality of light emitting devices on the substrate; the insulating layer is located on one side of the substrate and comprises a plurality of pixel openings; the isolation structure is located on the side of the insulating layer away from the substrate and defines a plurality of isolation openings; the isolation openings are in communication with the pixel openings; the light emitting device comprises a first electrode and a light emitting functional layer which are sequentially stacked away from the substrate; the pixel openings expose at least part of the first electrode; the light emitting functional layer is located in the pixel openings; the insulating layer has a plurality of recessed areas; the surface of the side of the isolation structure close to the substrate is spaced from the projection of the recessed areas on the substrate, and the projection of the recessed areas on the substrate is spaced from the projection of the first electrode on the substrate.

[0063] Optionally, before forming the insulating layer on the substrate, the method further comprises forming a plurality of electrode portions on the substrate;

[0064] The light emitting device further comprises a second electrode located on the side of the light emitting functional layer away from the substrate; the formation of the plurality of electrode portions, the insulating layer, the isolation structure and the light emitting device comprises:

[0065] forming an electrode material layer on the substrate and patterning the electrode material layer to obtain a plurality of electrode portions and the first electrode of the plurality of light emitting devices;

[0066] forming a second insulating layer and the isolation structure on the plurality of electrode portions and the first electrode of the plurality of light emitting devices in sequence;

[0067] forming the light emitting functional layer of the light emitting device in the pixel openings, forming the second electrode of the light emitting device in the isolation openings, and forming the recessed areas on the second insulating layer to obtain the insulating layer.

[0068] Optionally, the forming of the insulating layer and the isolation structure on the plurality of electrode portions and the first electrode of the plurality of light emitting devices in sequence comprises:

[0069] forming an insulating material layer on the plurality of electrode portions and the first electrode of the plurality of light emitting devices, and performing a first patterning process on the insulating material layer to form a plurality of first openings in the insulating material layer to obtain a first insulating layer; forming the isolation structure on the first insulating layer and performing a second patterning process on the first insulating layer to form the plurality of pixel openings in the first insulating layer to obtain a second insulating layer;

[0070] Alternatively, an insulating material layer is formed on the plurality of electrode portions and the first electrodes of the plurality of light emitting devices, the insulating material layer is subjected to a patterning process to obtain the second insulating layer, and the isolation structure is formed on the second insulating layer.

[0071] A fourth aspect of the present application provides a display device including the display panel as described in the first aspect or the second aspect of the present application.

[0072] In the solution of the present application, the display panel includes a substrate, an insulating layer, an isolation structure, and a plurality of light emitting devices. The insulating layer is located on one side of the substrate and includes a plurality of pixel openings. The isolation structure is located on a side of the insulating layer facing away from the substrate and defines a plurality of isolation openings. The isolation openings are in communication with the pixel openings. The light emitting devices include a first electrode and a light emitting functional layer which are sequentially stacked in a direction away from the substrate. The pixel openings expose at least a partial area of the first electrode, and the light emitting functional layer is located within the pixel openings. The insulating layer has a plurality of recessed regions. A surface of the isolation structure on the side close to the substrate has a normal projection on the substrate which is spaced apart from a normal projection of the recessed regions on the substrate, and the normal projection of the recessed regions on the substrate is spaced apart from a normal projection of the first electrode on the substrate. In this way, by spacing apart the normal projection of the recessed regions on the substrate from the normal projection of the first electrode on the substrate, the occurrence of channels / vias in the recessed regions of the insulating layer during the preparation of the display panel can be avoided, which in turn prevents the cathode and the anode of the light emitting device from being connected and short-circuiting, thereby reducing the occurrence rate of dark spots in the display panel and improving the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0073] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which like reference characters refer to like elements throughout. The drawings provided are for illustrative purposes only and, therefore, should not be considered to be limiting of the present application. In the drawings:

[0074] Figure 1 is a structural schematic diagram of a display panel provided by the prior related art;

[0075] Figure 2 is a planar structural schematic diagram of a display panel provided by an embodiment of the present application;

[0076] Figure 3 is a cross-sectional structural schematic diagram of a display panel along a cutting line AA' as shown in Figure 2

[0077] Figure 4 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0078] ​Figure 5 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0079] Figure 6 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0080] Figure 7 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0081] Figure 8 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0082] Figure 9 is a structural schematic diagram of a display panel provided by another embodiment of the present application;

[0083] Figure 10 is a flowchart of a preparation method of a display panel provided by an embodiment of the present application;

[0084] Figure 11 is a structural schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0085] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present application shall be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of the present application belong. The terms “first”, “second”, and similar terms used in the embodiments of the present application do not indicate any order, quantity, or importance, but are used to avoid confusion of the constituent elements.

[0086] Unless otherwise required by the context, throughout the specification, “plurality” means “at least two”, “comprising” is interpreted as open, inclusive meaning, i.e. “including, but not limited to”. In the description of the specification, the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “example”, “specific example” or “some examples” are intended to mean that the specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the specification. The illustrative representation of the above terms does not necessarily mean the same embodiment or example.

[0087] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0088] With the development and progress of display technology, the application of organic light emitting diode (OLED) display panel is more and more widely. Correspondingly, how to improve the display effect of the display panel preparation has always been the focus of attention.

[0089] The inventors have found that in the preparation process of the OLED display panel, when the cathode and the isolation structure are overlapped, as shown in Figure 1 , a single-sided overlapping method is used to realize the connection of the cathode and the isolation structure, that is, in each isolation opening K, one side of the cathode E is overlapped with the isolation structure 11, and the other side is not in contact with the isolation structure 11. However, in the display panel, the preparation process of different color light emitting devices is carried out in steps, for example, the light emitting device includes three kinds of light emitting devices of red, green and blue colors, and in the preparation process, the three kinds of light emitting devices are formed three times respectively. Each time a light emitting device of a color is prepared, etching operation is performed, and therefore, multiple etching operations will cause the insulating layer 13 (such as the pixel definition layer) at the light emitting device prepared later to have a pit (channel / via hole), when the pit penetrates the insulating layer 13, the cathode E of the light emitting device will be short-circuited with the anode F of the light emitting device through the pit, and thus the light emitting device fails, the display of the display panel appears dark spots, and the light emitting effect is affected.

[0090] Therefore, the present application provides a scheme capable of effectively improving the display effect, by setting the interval between the orthographic projection of the area prone to pit on the substrate and the orthographic projection of the anode on the substrate, even if a pit appears in the preparation process of the display panel, the cathode at the position corresponding to the pit will not be short-circuited with the anode, effectively avoiding the short-circuiting of the light emitting pixel at the corresponding position, thereby improving the display effect of the display panel.

[0091] Specifically, as an optional implementation of the disclosure, the embodiment of the present application provides a display panel. Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present application, Figure 3 is a cross-sectional structural schematic diagram of the display panel cut along the cutting line AA' as shown in Figure 2 , the display panel can at least include: a substrate 10, an isolation structure 11, an insulating layer 13 and a plurality of light emitting devices 121. Figure 2 Figure 3

[0092] ​​The substrate 10 primarily serves as a support and load-bearing element. Specifically, the substrate 10 may include rigid substrates such as glass substrates or silicon substrates, or flexible substrates such as stainless steel (SUS) or flexible polyimide (PI). In other words, the display panel in this embodiment may include a rigid display panel that cannot be bent, or a flexible display panel that can be bent.

[0093] like Figure 3 As shown, the light-emitting device 121 includes a light-emitting functional layer 1211.

[0094] An isolation structure 11 is located on one side of the substrate 10, defining a plurality of isolation openings K. The light-emitting functional layers 1211 of the plurality of light-emitting devices 121 are respectively located within the plurality of isolation openings K. With this configuration, the light-emitting functional layers 1211 of each light-emitting device 121 can be isolated by the isolation structure 11, thereby obtaining each independent sub-pixel.

[0095] It should be noted that the international application with application number PCT / CN2023 / 134518 and the Chinese patent applications with application numbers 202310759370.2, 202310740412.8, 202310707209.0, 202311346196.5, and 202310855006.6 describe the relevant technology of the isolation structure, and the contents of which are incorporated herein by reference.

[0096] like Figure 3 As shown, the light-emitting device 121 may further include a first electrode 1212 located on the side of the light-emitting functional layer 1211 close to the substrate 10, and a second electrode 1213 located on the side of the light-emitting functional layer 1211 away from the substrate 10; the second electrode 1213 is located in the isolation opening K.

[0097] Specifically, the light-emitting functional layer 1211 may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer sequentially stacked on the side of the first electrode 1212 facing away from the substrate 10. A second electrode 1213 is disposed on the side of the electron injection layer facing away from the substrate 10.

[0098] The light-emitting material layer can include a material having electroluminescence (EL) performance (hereinafter referred to as a light-emitting material). The first electrode 1212 can also be referred to as an anode, and is configured to provide holes to the light-emitting functional layer 1211. The second electrode 1213 can also be referred to as a cathode, and is configured to provide electrons to the light-emitting material layer. The holes provided by the first electrode 1212 and the electrons provided by the second electrode 1213 can excite the light-emitting material of the light-emitting material layer to emit light after recombination in the light-emitting material layer. The hole injection layer and the hole transport layer can be made of a material with high hole mobility, so that the holes generated by the first electrode 1212 can be better transmitted to the light-emitting material layer. Similarly, the electron injection layer and the electron transport layer can be made of a material with high electron mobility, so that the electrons generated by the second electrode 1213 can be better transmitted to the light-emitting material layer.

[0099] As shown in Figure 4 , the insulating layer 13 is located on the side of the isolation structure 11 close to the substrate 10, and can include a plurality of pixel openings R. The pixel openings R are in communication with the isolation openings K.

[0100] Specifically, the pixel openings R can expose at least part of the area of the first electrode 1212, and the light-emitting functional layer 1211 is located in the pixel openings R.

[0101] The insulating properties of the insulating layer 13 can insulate the first electrode 1212 from the isolation structure 11. Moreover, since the area of the first electrode 1212 exposed by the pixel openings R of the light-emitting device 121 is the light-emitting area of the light-emitting device 121, the light-emitting area can be better defined through the pixel openings R of the insulating layer 13.

[0102] In application, the insulating layer 13 can include a pixel defining layer.

[0103] Still as shown in Figure 4 , the insulating layer 13 has a plurality of recessed areas F; the surface of the isolation structure 11 close to the substrate 10 is arranged on the substrate 10 in a normal projection, and the normal projection of the recessed area F on the substrate 10 is arranged in a normal projection of the first electrode 1212 on the substrate 10.

[0104] It should be noted that the recessed area F is the area on the insulating layer 13 where pits are prone to occur.

[0105] The normal projection of the recessed area F on the substrate 10 is arranged in a normal projection of the first electrode 1212 on the substrate 10, which can avoid the situation that the cathode and the anode of the light-emitting device 121 are short-circuited due to the pits in the recessed area F of the insulating layer 13 during the preparation of the display panel, thereby reducing the occurrence rate of dark spots in the display panel and improving the display effect.

[0106] In particular implementation, as shown in Figure 4 The recessed area F has at least one through hole T. That is, in the process of preparing the display panel, due to the influence of multiple etching operations, the recessed area F will have at least one through hole T, which can penetrate the insulating layer 13, so that at least part of the area of the film layer located on the side of the insulating layer 13 close to the substrate 10 is exposed. Since the orthographic projection of the recessed area F on the substrate 10 is arranged apart from the orthographic projection of the first electrode 1212 on the substrate 10, the through hole T will not expose the area of the first electrode 1212, that is, the existence of the through hole T will not cause the second electrode 1213 to directly contact the first electrode 1212, thereby avoiding the short circuit of the light emitting device 121 corresponding to the isolation opening K, and ensuring the display effect of the display panel.

[0107] It should be noted that for the pit of the insulating layer 13 caused by the multiple etching of the etching liquid in the process of preparing the display panel, the through hole T is the pit.

[0108] Of course, the present application is not limited to this, in some other embodiments, the through hole can also be prepared in the recessed area in the process.

[0109] In some embodiments, as shown in Figure 5 The display panel can further include a plurality of electrode portions 14 located on the side of the insulating layer 13 close to the substrate 10.

[0110] Correspondingly, the insulating layer 13 also has a plurality of first openings Q; the first openings Q are arranged apart from the recessed area F and the pixel opening R. The first openings Q expose at least part of the area of the electrode portion 14, and the electrode portion 14 contacts the isolation structure 11 through the first openings Q, realizing the electrical connection between the electrode portion 14 and the isolation structure 11; the through hole T exposes at least part of the area of the corresponding electrode portion 14, and the second electrode 1213 contacts the electrode portion 14 through the through hole T, thereby laying a structural foundation for the electrical connection between the second electrode 1213 and the isolation structure 11.

[0111] In this way, by arranging a plurality of electrode portions 14, and the electrode portion 14 contacting the isolation structure 11 through the first openings Q, and the through hole T exposing at least part of the area of the electrode portion 14, the cathode can be prevented from being overlapped with the anode at the corresponding position due to the existence of the through hole T, thereby preventing the corresponding light emitting device from being invalid.

[0112] Moreover, the existence of the through hole T can make the second electrode 1213 located in the isolation opening K contact the electrode portion 14 at the corresponding position through the through hole T, that is, realize the electrical connection between the second electrode 1213 and the isolation structure 11, thereby reducing the overlapping impedance between the second electrode 1213 and the isolation structure 11, and improving the display effect.

[0113] In some implementations, it is still as follows Figure 5 As shown, the first electrode 1212 is disposed on the same layer as the electrode portion 14, and the orthographic projection of the first electrode 1212 on the substrate 10 and the orthographic projection of the electrode portion 14 on the substrate 10 are spaced apart. In this way, the problem of failure of the light-emitting device 121 caused by the through hole T during the manufacturing process of the display panel can be solved without increasing the thickness of the display panel. This simplifies the manufacturing process, reduces the overlap impedance between the second electrode 1213 and the isolation structure 11, and improves the display effect.

[0114] When the first electrode 1212 and the electrode portion 14 are disposed in the same layer, in order to further simplify the manufacturing process and save manufacturing costs, the material of the first electrode 1212 can be the same as the material of the electrode portion 14, so that the first electrode 1212 is formed at the same time as the electrode portion 14 is formed.

[0115] In some implementations, such as Figure 6 As shown, the orthographic projection of the electrode portion 14 on the substrate 10 partially overlaps with the orthographic projection of the isolation structure 11 on the substrate 10, and the overlapping area is the first region S1; the orthographic projection of the first opening Q on the substrate 10 is located within the first region S1.

[0116] By placing the orthographic projection of the first opening Q on the substrate 10 within the first region S1, the isolation structure 11 can directly contact the corresponding electrode part 14 through the first opening Q during the fabrication of the display panel, thereby achieving electrical connection between the isolation structure 11 and each electrode part 14, simplifying the fabrication process and making it easy to implement.

[0117] In some implementations, it is still as follows Figure 6 As shown, at least a portion of the side of the second electrode 1213 overlaps with the sidewall of the isolation structure 11.

[0118] Specifically, all sides of the second electrode 1213 can overlap with the sidewall of the isolation structure 11, or some sides of the second electrode 1213 can overlap with the sidewall of the isolation structure 11. In this way, the second electrode 1213 can be electrically connected to the isolation structure 11, which provides convenience for simplifying the manufacturing process and improving the display effect.

[0119] In some implementations, such as Figure 6 As shown, the orthographic projection of the light-emitting functional layer 1211 on the substrate 10 and the orthographic projection of the through hole T on the substrate 10 are spaced apart. In other words, the light-emitting functional layer 1211 does not cover the through hole T, thereby providing convenience for the second electrode 1213 to directly contact the electrode part 14 through the through hole T.

[0120] On the other hand, such as Figure 6As shown, the orthographic projection of the light-emitting functional layer 1211 on the substrate 10 can also be spaced apart from the orthographic projection of the recessed area F on the substrate 10, that is, the light-emitting functional layer 1211 does not cover the recessed area F, so that in the preparation process of the display panel, no matter where the through hole T is located in the recessed area F, it can be ensured that the light-emitting functional layer 1211 will not cover the through hole T, and the second electrode 1213 is also facilitated to directly contact the electrode part 14 through the through hole T. Moreover, the orthographic projection of the light-emitting functional layer 1211 on the substrate 10 is spaced apart from the orthographic projection of the recessed area F on the substrate 10, which can avoid the situation that the through hole T is covered due to process errors, while ensuring the display effect, and provides structural protection for the subsequent electrical connection between the second electrode 1213 and the isolation structure 11.

[0121] In some embodiments, as shown in Figure 7 The second electrode 1213 contacts the electrode part 14 through the through hole T, thereby realizing the electrical connection between the second electrode 1213 and the electrode part 14. Since the electrode part 14 contacts the isolation structure 11, the electrical connection between the second electrode 1213 and the isolation structure 11 is realized, thereby reducing the contact impedance between the isolation structure 11 and the second electrode 1213, improving the light-emitting efficiency of the light-emitting device 121, and improving the display effect of the display panel.

[0122] In implementation, the orthographic projection of the second electrode 1213 on the substrate 10 partially overlaps the orthographic projection of the corresponding electrode part 14 on the substrate 10, and the overlapping area is the second area S2. The orthographic projection of the through hole T on the substrate 10 is located in the second area S2.

[0123] In this way, it can be ensured that the second electrode 1213 covers the through hole T, that is, the second electrode 1213 directly contacts the electrode part 14 through the through hole. Since the orthographic projection of the through hole T on the substrate 10 is located in the second area S2, the second electrode 1213 can be effectively prevented from being short-circuited with the first electrode 1212 due to the presence of the through hole T, thereby avoiding the failure of the corresponding light-emitting device 121 and improving the display effect of the display panel.

[0124] In some embodiments, as shown in Figure 7 The isolation structure 11 can include a first structure 111 and a second structure 112 which are sequentially stacked away from the substrate 10. The orthographic projection of the second structure 112 on the substrate 10 covers the orthographic projection of the first structure 111 on the substrate 10.

[0125] The first structure 111 and the second structure 112 can be an integrated structure, or the first structure 111 and the second structure 112 can be two independent film layers.

[0126] Specifically, the isolation structure 11 can have a shape of being wide at the top and narrow at the bottom, for example, in the thickness direction of the display panel, the cross-sectional structure of the isolation structure 11 can be an inverted trapezoidal shape or a T shape, so that the orthographic projection of the second structure 112 on the substrate 10 covers the orthographic projection of the first structure 111 on the substrate 10.

[0127] In implementation, the light-emitting functional layer 1211 can be interrupted by the isolation structure 11 in the evaporation process, and the light-emitting functional layer 1211 of the adjacent light-emitting device 121 is interrupted by the isolation structure 11. In addition, when the second electrode 1213 is formed, the second electrode 1213 can also be interrupted by the isolation structure 11, so that the second electrode 1213 of the adjacent light-emitting device 121 is arranged in a spaced manner. In order to enable the second electrode 1213 of the adjacent light-emitting device 121 to be electrically connected, the first structure 111 can be designed as a conductive structure, and the side edge of the second electrode 1213 of the adjacent light-emitting device 121 can be overlapped to the first structure 111, so that the manufacturing of the full-area cathode can be facilitated, and the manufacturing process is simplified.

[0128] The first structure 111 and the second structure 112 can be two structures of different materials. The first structure 111 and the second structure 112 can be metals of different materials, for example, the first structure 111 can be aluminum or a stack of aluminum and molybdenum, and the material of the second structure 112 can be titanium. Alternatively, the second structure 112 is a metal material, and the first structure 111 is an inorganic insulating material or an organic insulating material, such as silicon oxide (SiOx), silicon nitride (SiNx), and other inorganic insulating materials, or PI and other organic insulating materials, which can be selected according to actual conditions.

[0129] In some embodiments, as shown in Figure 7 The isolation structure 11 can further include a third structure 113 located on the side of the first structure 111 close to the substrate 10.

[0130] Correspondingly, the cross-sectional structure of the isolation structure 11 can also be an H-shaped structure.

[0131] When the isolation structure 11 contacts the corresponding electrode part 14 through the first opening Q, the third structure 113 of the isolation structure 11 can contact the corresponding electrode part 14 through the first opening Q, so as to realize the electrical connection between the isolation structure 11 and the electrode part 14, and lay a structural foundation for increasing the contact impedance between the second electrode 1213 and the isolation structure 11.

[0132] In implementation, the first structure 111, the second structure 112, and the third structure 113 can be three structures of different materials. Specifically, the material of the first structure 111 can include aluminum; the material of the second structure 112 can include titanium, and the material of the third structure 113 can include titanium or molybdenum.

[0133] In some embodiments, the light-emitting device 121 can include a first light-emitting device; the isolation opening K can include a first isolation opening; and the light-emitting functional layer of the first light-emitting device is located in the first isolation opening.

[0134] The first light-emitting device can be a light-emitting device prepared later in a plurality of color light-emitting devices. For the light-emitting device prepared later, the corresponding first isolation opening will bear more etching times, and accordingly, pits are more likely to occur. Therefore, by arranging the electrode part 14 at the position corresponding to the first isolation opening, the short circuit of the cathode and the anode of the first light-emitting device can be avoided, thereby improving the display effect.

[0135] In implementation, the isolation opening K can further include a second isolation opening and a third isolation opening. In this case, the electrode part 14 can be arranged only at the position corresponding to the first isolation opening, thereby ensuring that the light-emitting device corresponding to the first isolation opening will not have the short circuit of the cathode and the anode, and avoiding the problem of failure of the light-emitting device corresponding to the first isolation opening.

[0136] Correspondingly, the light-emitting device 121 can further include a second light-emitting device and a third light-emitting device; the light-emitting functional layer of the second light-emitting device is located in the second isolation opening, and the light-emitting functional layer of the third light-emitting device is located in the third isolation opening.

[0137] In actual application, the first light-emitting device, the second light-emitting device and the third light-emitting device can be three different color light-emitting devices among red light-emitting devices, green light-emitting devices and blue light-emitting devices.

[0138] For example, the first light-emitting device can be a blue light-emitting device, the second light-emitting device can be a green light-emitting device, and the third light-emitting device can be a red light-emitting device. In this way, in the preparation process of the display panel, the red light-emitting device and the green light-emitting device can be formed first, and then the blue light-emitting device can be formed.

[0139] In actual application, the first light-emitting device, the second light-emitting device and the third light-emitting device can be three different color light-emitting devices among red light-emitting devices, green light-emitting devices and blue light-emitting devices. That is, the preparation sequence of the three color light-emitting devices is green light-emitting device, blue light-emitting device and red light-emitting device, or blue light-emitting device, green light-emitting device and red light-emitting device.

[0140] In some embodiments, as shown in Figure 8 The display panel can further include a first encapsulation layer 20; the first encapsulation layer 20 includes a plurality of encapsulation parts 20A; and the plurality of encapsulation parts 20A are respectively located on the side of the plurality of light-emitting devices 121 away from the substrate 10.

[0141] In implementation, the packaging portions 20A are arranged on the side of the light emitting devices 121 away from the substrate 10, and each light emitting device 121 can be packaged by a corresponding packaging portion 20A, so as to realize independent packaging of each light emitting device 121.

[0142] In application, the packaging portions 20A of the first packaging layer 20 can be formed by combining the chemical vapor deposition (CVD) method and the etching method. The material of the packaging portions 20A can be inorganic insulating material.

[0143] Of course, the present application is not limited to this, and in some other embodiments, the material of the packaging portions 20A can also be organic insulating material. Specifically, the actual packaging requirements and technical needs can be set according to actual packaging requirements and technical needs.

[0144] In some embodiments, as shown in Figure 8 The display panel can further include a second packaging layer 21; the second packaging layer 21 is located on the side of the first packaging layer 20 away from the substrate 10; and the orthographic projection of the second packaging layer 21 on the substrate 10 covers the substrate 10.

[0145] The orthographic projection of the second packaging layer 21 on the substrate 10 covers the substrate 10, so as to realize further packaging of the light emitting devices 121.

[0146] Specifically, the material of the second packaging layer 21 can be organic material or inorganic material. In implementation, the second packaging layer 21 can be an organic packaging film formed by inkjet printing.

[0147] In some embodiments, as shown in Figure 8 The display panel can further include a third packaging layer 22; the third packaging layer 22 is located on the side of the second packaging layer 21 away from the substrate 10; and the orthographic projection of the third packaging layer 22 on the substrate 10 covers the substrate 10. In this way, further packaging can be performed on the basis of the second packaging layer 21, so as to improve the packaging effect.

[0148] In application, the first packaging layer 20 and the third packaging layer 22 can be prepared by using inorganic material, and the second packaging layer 21 can be prepared by using organic material. The second packaging layer 21 prepared by using organic material is located between the first packaging layer 20 and the third packaging layer 22 prepared by using inorganic material, and can form a packaging structure. The packaging structure can better isolate water and oxygen, and further improve the packaging effect.

[0149] Of course, in other embodiments, other film layers can also be provided as needed, for example, a polarizer, an optical adhesive layer and a cover plate can be sequentially provided on the side of the third encapsulation layer 22 away from the substrate 10, so as to improve the display effect and enhance the protection of the display panel; or, when touch control is required, a touch function layer can be provided on the side of the third encapsulation layer 22 away from the substrate 10, so as to realize the touch control function of the display panel, and the like, which will not be described herein again.

[0150] As another optional implementation of the disclosure, the embodiments of the present application also provide a display panel, as shown in the figure, which can include a substrate 10, a plurality of electrode portions 14, an insulating layer 13, an isolation structure 11 and a plurality of light emitting devices 121. Figure 9

[0151] The substrate 10 mainly serves to support and carry, etc. Specifically, the substrate 10 can include a rigid substrate such as a glass substrate or a silicon substrate, or a flexible substrate such as stainless steel (SUS) or flexible polyimide (PI). That is, the display panel in the embodiments of the present application can include a rigid display panel that cannot be bent, or a flexible display panel that can be bent.

[0152] The light emitting device 121 includes a light emitting functional layer 1211 and a second electrode 1213 which are sequentially stacked away from the substrate 10.

[0153] The plurality of electrode portions 14 are located on one side of the substrate 10.

[0154] The insulating layer 13 is located on the side of the plurality of electrode portions 14 away from the substrate 10, and is provided with a plurality of first openings.

[0155] The isolation structure 11 is located on the side of the insulating layer 13 away from the substrate 10, and defines a plurality of isolation openings K. The light emitting functional layer 1211 and the second electrode 1213 of the plurality of light emitting devices 121 are respectively located in the plurality of isolation openings K. In this way, the light emitting functional layer 1211 of each light emitting device 121 can be blocked by the isolation structure 11, so as to obtain each independent sub-pixel.

[0156] The insulating layer 13 also has a plurality of through holes T, and the through holes T expose at least part of the area of the electrode portion 14; the second electrode 1213 contacts the corresponding electrode portion 14 through the through hole T, that is, the second electrode 1213 is electrically connected to the electrode portion 14 through the through hole T.

[0157] It should be noted that, for the pit of the insulating layer 13 caused by the multiple etching of the etching liquid in the preparation process of the display panel, the through hole T is the pit.

[0158] ​Of course, the present application is not limited to this, in some other embodiments, the through hole T can also be prepared in the process.

[0159] In this embodiment, by setting the corresponding electrode part 14 in the area prone to pit, and the electrode part 14 is electrically connected with the isolation structure 11 at the corresponding position, even if the pit penetrates the insulating layer 13 after the pit occurs in the preparation process of the display panel, the cathode at the position corresponding to the pit will not be short-circuited with the anode. Instead, the pit can be connected with the electrode part 14, and then the electrode part 14 is electrically connected with the isolation structure 11, which can avoid the short-circuiting of the light-emitting pixel at the corresponding position, and also improve the lap joint effect of the cathode and the isolation structure 11, thereby improving the display effect of the display panel.

[0160] In some embodiments, as shown in Figure 9 The light-emitting device 121 can further include a first electrode 1212 located on the side of the light-emitting functional layer 1211 close to the substrate 10.

[0161] In implementation, the first electrode 1212 can be disposed in the same layer as the electrode part 14, and the orthographic projection of the first electrode 1212 on the substrate 10 is spaced apart from the orthographic projection of the electrode part 14 on the substrate 10. In this way, the problem of failure of the light-emitting device 121 caused by the through hole during the preparation process of the display panel can be solved without increasing the thickness of the display panel, which simplifies the preparation process and reduces the lap joint impedance between the second electrode 1213 and the isolation structure 11, thereby improving the display effect.

[0162] When the first electrode 1212 is disposed in the same layer as the electrode part 14, in order to further simplify the preparation process and save preparation cost, the material of the first electrode 1212 can be the same as that of the electrode part 14, so that the first electrode 1212 is formed at the same time as the electrode part 14.

[0163] In some embodiments, the insulating layer 13 can include a plurality of pixel openings R. The pixel openings R are in communication with the isolation openings K.

[0164] Specifically, the pixel openings R can expose at least a part of the area of the first electrode 1212, and the light-emitting functional layer 1211 is located in the pixel openings R.

[0165] The insulating property of the insulating layer 13 can insulate the first electrode 1212 from the isolation structure 11. Moreover, since the area of the first electrode 1212 exposed by the pixel openings R of the light-emitting device 121 is the light-emitting area of the light-emitting device 121, the light-emitting area can be better defined through the pixel openings R of the insulating layer 13.

[0166] In application, the insulating layer 13 can include a pixel defining layer.

[0167] In some embodiments, a normal projection of the surface of the isolation structure 11 on the substrate 10 is arranged to be spaced apart from a normal projection of the through hole T on the substrate 10, and the normal projection of the through hole T on the substrate 10 is arranged to be spaced apart from a normal projection of the first electrode 1212 on the substrate 10.

[0168] In this way, the short circuit caused by the cathode and the anode of the light emitting device 121 being overlapped due to the pit in the display panel preparation process can be avoided, thereby reducing the occurrence rate of dark spots in the display panel and improving the display effect.

[0169] In some other embodiments, the structures of other film layers of the display panel can refer to the specific structure implementations of the other film layers described in any of the above embodiments, which will not be described herein again.

[0170] As another optional implementation of the disclosure, the embodiments of the present application also provide a preparation method of a display panel, as shown in Figure 10 The preparation method of the display panel can at least include the following steps:

[0171] S1001, providing a substrate.

[0172] S1002, forming an insulating layer, an isolation structure and a plurality of light emitting devices on the substrate; the insulating layer is located on one side of the substrate and includes a plurality of pixel openings; the isolation structure is located on a side of the insulating layer away from the substrate and defines a plurality of isolation openings; the isolation openings are in communication with the pixel openings; the light emitting device includes a first electrode and a light emitting functional layer which are sequentially stacked in a direction away from the substrate; at least part of the area of the first electrode is exposed by the pixel opening; the light emitting functional layer is located in the pixel opening; the insulating layer has a plurality of recessed areas; a normal projection of the surface of the isolation structure on the substrate is arranged to be spaced apart from a normal projection of the recessed area on the substrate, and a normal projection of the recessed area on the substrate is arranged to be spaced apart from a normal projection of the first electrode on the substrate.

[0173] In the embodiments of the present application, the normal projection of the recessed area on the substrate is arranged to be spaced apart from the normal projection of the first electrode on the substrate, which can avoid the cathode and the anode of the light emitting device being overlapped due to the channel / via in the recessed area of the insulating layer in the display panel preparation process, thereby reducing the occurrence rate of dark spots in the display panel and improving the display effect.

[0174] In some embodiments, before forming the insulating layer on the substrate, the preparation method of the display panel can further include: forming a plurality of electrode portions on the substrate.

[0175] Correspondingly, the light emitting device can further include a second electrode located on a side of the light emitting functional layer away from the substrate.

[0176] The forming process of the plurality of electrode portions, the insulating layer, the isolation structure and the light emitting device is as follows:

[0177] First, an electrode material layer is formed on the substrate, and the electrode material layer is subjected to a patterning process to obtain a plurality of electrode portions and a first electrode of a plurality of light emitting devices.

[0178] In this way, the first electrode and the electrode portions are formed synchronously, and the preparation cost and the preparation process can be saved while increasing the plurality of electrode portions.

[0179] Second, a second insulating layer and an isolation structure are sequentially formed on the plurality of electrode portions and the first electrode of the plurality of light emitting devices.

[0180] Third, a light emitting functional layer of the light emitting device is formed in the pixel opening, a second electrode of the light emitting device is formed in the isolation opening, and a recessed area is formed on the second insulating layer to obtain the insulating layer.

[0181] It should be noted that the recessed area is an area on the insulating layer where pits are prone to occur.

[0182] In the process of forming the light emitting functional layer in each pixel opening and the second electrode of the light emitting device in the corresponding isolation opening, the etching liquid etches to form a recessed area on the insulating layer. The normal projection of the recessed area on the substrate is arranged to be spaced from the normal projection of the first electrode on the substrate, which can avoid the situation that the cathode and the anode of the light emitting device are short-circuited due to the occurrence of pits in the recessed area of the insulating layer during the preparation of the display panel, thereby reducing the occurrence rate of dark spots in the display panel and improving the display effect.

[0183] It should be understood that in the process of forming the light emitting functional layer and the second electrode, the light emitting functional layer and the corresponding second electrode of the blue light emitting device can be prepared first, then the light emitting functional layer and the corresponding second electrode of the green light emitting device are prepared, and finally the light emitting functional layer and the corresponding second electrode of the red light emitting device are prepared.

[0184] In some embodiments, when the insulating layer and the isolation structure are sequentially formed on the plurality of electrode portions and the first electrode of the plurality of light emitting devices, it can specifically include: forming an insulating material layer, and subjecting the insulating material layer to a first patterning process to form a plurality of first openings in the insulating material layer to obtain a first insulating layer; forming an isolation structure on the first insulating layer, and subjecting the first insulating layer to a second patterning process to form a plurality of pixel openings in the first insulating layer to obtain the insulating layer. In this way, the insulating layer can be formed by two times of patterning process, which can improve the preparation precision of the insulating layer and ensure the yield of the display panel.

[0185] Of course, the present application is not limited to this, in some other embodiments, in order to save the difference process, when forming the insulating layer and the isolation structure, the insulating material layer can also be formed on the plurality of electrode parts and the first electrodes of the plurality of light emitting devices, and the insulating material layer is patterned to obtain the insulating layer; and the isolation structure is formed on the insulating layer.

[0186] The structure of each layer of the display panel obtained by the preparation method and the corresponding description are referred to the corresponding description in the display panel as described above.

[0187] As an optional implementation of the present application, the present application also provides a display device, which comprises the display panel provided in any of the above embodiments. As shown in Figure 11 Figure 11 The display device provided in an embodiment of the present application is shown in a structural schematic diagram, which can be a smart phone, a tablet computer or a digital camera, and the like, and will not be described here.

[0188] The embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0189] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A display panel, characterized in that, include: substrate; An insulating layer, located on one side of the substrate, includes multiple pixel openings; An isolation structure is located on the side of the insulating layer opposite to the substrate, defining a plurality of isolation openings; The isolation opening is connected to the pixel opening; Multiple light-emitting devices; each light-emitting device includes a first electrode and a light-emitting functional layer sequentially stacked in a direction away from the substrate; The pixel opening exposes at least a portion of the area of ​​the first electrode; the light-emitting functional layer is located within the pixel opening; The insulating layer has multiple recessed areas; the orthographic projection of the surface of the isolation structure on the substrate near the substrate and the orthographic projection of the recessed area on the substrate are spaced apart, and the orthographic projection of the recessed area on the substrate and the orthographic projection of the first electrode on the substrate are spaced apart, and the recessed area has at least one through hole. The display panel also includes a plurality of electrode portions located on the side of the insulating layer near the substrate; the through holes expose at least a portion of the corresponding electrode portions.

2. The display panel according to claim 1, characterized in that, The insulating layer includes a pixel-defining layer.

3. The display panel according to claim 2, characterized in that, The insulating layer also has a plurality of first openings; the first openings are spaced apart from the recessed area and the pixel opening; the first openings expose at least a portion of the electrode portion; the electrode portion contacts the isolation structure through the first openings.

4. The display panel according to claim 3, characterized in that, The first electrode and the electrode portion are disposed on the same layer, and the orthographic projection of the first electrode on the substrate and the orthographic projection of the electrode portion on the substrate are spaced apart.

5. The display panel according to claim 4, characterized in that, The material of the first electrode is the same as the material of the electrode portion.

6. The display panel according to claim 3, characterized in that, The orthographic projection of the electrode portion on the substrate overlaps with the orthographic projection of the isolation structure on the substrate, and the overlapping area is the first region; The orthographic projection of the first opening onto the substrate lies within the first region.

7. The display panel according to claim 3, characterized in that, The light-emitting device further includes a second electrode located on the side of the light-emitting functional layer opposite to the substrate; The second electrode is located within the isolation opening.

8. The display panel according to claim 7, characterized in that, At least a portion of the sidewall of the second electrode overlaps with the sidewall of the isolation structure.

9. The display panel according to claim 7, characterized in that, The orthographic projection of the light-emitting functional layer on the substrate and the orthographic projection of the through hole on the substrate are spaced apart.

10. The display panel according to claim 7, characterized in that, The orthographic projection of the light-emitting functional layer on the substrate and the orthographic projection of the recessed area on the substrate are spaced apart.

11. The display panel according to claim 7, characterized in that, The second electrode contacts the corresponding electrode portion through the through hole.

12. The display panel according to claim 11, characterized in that, The orthographic projection of the second electrode on the substrate overlaps with the orthographic projection of the corresponding electrode portion on the substrate, and the overlapping area is the second region. The orthographic projection of the through hole on the substrate is located within the second region.

13. The display panel according to claim 3, characterized in that, The isolation structure includes a first structure and a second structure that are sequentially stacked in a direction away from the substrate; The orthographic projection of the second structure on the substrate covers the orthographic projection of the first structure on the substrate.

14. The display panel according to claim 13, characterized in that, The first structure and the second structure are made of different materials.

15. The display panel according to claim 13, characterized in that, The material of the second structure includes titanium.

16. The display panel according to claim 13, characterized in that, The isolation structure also includes a third structure located on the side of the first structure closer to the substrate; The third structure contacts the corresponding electrode portion through the first opening.

17. The display panel according to claim 16, characterized in that, The orthographic projection of the third structure on the substrate overlaps the orthographic projection of the first structure on the substrate.

18. The display panel according to claim 16, characterized in that, The third structure is made of a different material than the first structure; The material of the third structure includes molybdenum; The material of the first structure includes aluminum.

19. The display panel according to claim 1, characterized in that, It also includes a first encapsulation layer; the first encapsulation layer includes multiple encapsulation portions; The plurality of encapsulation portions are located on the side of the plurality of light-emitting devices that are away from the substrate.

20. The display panel according to claim 19, characterized in that, The material of the first encapsulation layer includes inorganic materials.

21. The display panel according to claim 19, characterized in that, It also includes a second encapsulation layer; The second encapsulation layer is located on the side of the first encapsulation layer that is away from the substrate; the orthographic projection of the second encapsulation layer on the substrate covers the substrate.

22. The display panel according to claim 21, characterized in that, The material of the second encapsulation layer includes organic materials.

23. The display panel according to claim 21, characterized in that, It also includes a third encapsulation layer; The third encapsulation layer is located on the side of the second encapsulation layer opposite to the substrate; the orthographic projection of the third encapsulation layer on the substrate covers the substrate.

24. The display panel according to claim 23, characterized in that, The material of the third encapsulation layer includes inorganic materials.

25. A display panel, characterized in that, include: substrate; Multiple electrode sections are located on one side of the substrate; An insulating layer is located on the side of the plurality of electrode portions facing away from the substrate, and the insulating layer is provided with a plurality of first openings; Multiple light-emitting devices; each light-emitting device includes a light-emitting functional layer and a second electrode sequentially stacked in a direction away from the substrate; An isolation structure is located on the side of the insulating layer opposite to the substrate, defining a plurality of isolation openings; The light-emitting functional layer and the second electrode are located within the isolation opening; The isolation structure is in contact with the second electrode through the first opening; The insulating layer has a plurality of through holes; the through holes expose at least a portion of the electrode portion; the second electrode contacts the corresponding electrode portion through the through holes.

26. The display panel according to claim 25, characterized in that, The light-emitting device further includes a first electrode located on the side of the light-emitting functional layer near the substrate; The first electrode and the electrode portion are disposed on the same layer, and the orthographic projection of the first electrode on the substrate and the orthographic projection of the electrode portion on the substrate are spaced apart.

27. The display panel according to claim 26, characterized in that, The material of the first electrode is the same as the material of the electrode portion.

28. The display panel according to claim 26, characterized in that, The insulating layer further includes a plurality of pixel openings; the pixel openings are spaced apart from the through-hole and the first opening; The pixel opening exposes at least a portion of the area of ​​the first electrode; the pixel opening is in communication with the isolation opening; the light-emitting functional layer is located within the pixel opening.

29. The display panel according to claim 28, characterized in that, The insulating layer includes a pixel-defining layer.

30. The display panel according to claim 26, characterized in that, The orthographic projection of the surface of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the through hole on the substrate, and the orthographic projection of the through hole on the substrate is spaced apart from the orthographic projection of the first electrode on the substrate.

31. A method for manufacturing a display panel, characterized in that, include: Provide substrate; An insulating layer, an isolation structure, and multiple light-emitting devices are formed on the substrate; The insulating layer is located on one side of the substrate and includes multiple pixel openings; The isolation structure is located on the side of the insulating layer opposite to the substrate, defining a plurality of isolation openings; The isolation opening is connected to the pixel opening; the light-emitting device includes a first electrode and a light-emitting functional layer sequentially stacked in a direction away from the substrate; The pixel opening exposes at least a portion of the area of ​​the first electrode; the light-emitting functional layer is located within the pixel opening; The insulating layer has multiple recessed areas; the orthographic projection of the surface of the isolation structure on the substrate near the substrate and the orthographic projection of the recessed area on the substrate are spaced apart, and the orthographic projection of the recessed area on the substrate and the orthographic projection of the first electrode on the substrate are spaced apart, and the recessed area has at least one through hole. A plurality of electrode portions are formed on the side of the insulating layer near the substrate; the through holes expose at least a portion of the corresponding electrode portions.

32. The method according to claim 31, characterized in that, Before forming an insulating layer on the substrate, the method further includes: forming a plurality of electrode portions on the substrate; The light-emitting device further includes a second electrode located on the side of the light-emitting functional layer opposite to the substrate; the formation process of the plurality of electrode portions, insulating layer, isolation structure and light-emitting device includes: An electrode material layer is formed on the substrate, and the electrode material layer is patterned to obtain multiple electrode portions and the first electrodes of the multiple light-emitting devices; A second insulating layer and the isolation structure are sequentially formed on the plurality of electrode portions and the first electrodes of the plurality of light-emitting devices; A light-emitting functional layer of the light-emitting device is formed within the pixel opening, a second electrode of the light-emitting device is formed within the isolation opening, and the recessed area is formed on the second insulating layer to obtain the insulating layer.

33. The method according to claim 32, characterized in that, The method of sequentially forming the insulating layer and the isolation structure on the plurality of electrode portions and the first electrode of the plurality of light-emitting devices includes: An insulating material layer is formed on the first electrodes of the plurality of electrode portions and the plurality of light-emitting devices, and the insulating material layer is subjected to a first patterning process to form a plurality of first openings in the insulating material layer to obtain a first insulating layer; the isolation structure is formed on the first insulating layer, and the first insulating layer is subjected to a second patterning process to form the plurality of pixel openings in the first insulating layer to obtain a second insulating layer; Alternatively, an insulating material layer is formed on the plurality of electrode portions and the first electrode of the plurality of light-emitting devices, the insulating material layer is patterned to obtain the second insulating layer, and the isolation structure is formed on the second insulating layer.

34. A display device, characterized in that, Includes the display panel as described in any one of claims 1-30.

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