Display panel and display device

Abstract

The application relates to a display panel and a display device. The display panel comprises a substrate, a partition structure arranged on the substrate and defining a plurality of first openings, and a plurality of light emitting elements arranged on the substrate and arranged in the first openings. The light emitting element comprises at least two light emitting units arranged in layers, and the light emitting unit comprises a light emitting layer and a functional film layer arranged in layers. At least one functional film layer in the at least two light emitting units is electrically connected to the partition structure. The display panel has higher current demand at the same brightness, improves the working state of the TFT, reduces the adverse effects of the process defects of the TFT on the current stability of the TFT, improves the display effect of the display panel, and improves the mura phenomenon of the display panel.

Description

TECHNICAL FIELD

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

[0002] OLED (Organic Light Emitting Diode) device is one of the hotspots in the field of display panel research at present. The OLED device has the advantages of low energy consumption, low cost, self-luminous, wide viewing angle and fast response speed. In recent years, with the development of technology, various light-emitting device structures have been proposed, and the stacked OLED device is one of them. The stacked OLED device is to connect two or more single-layer OLED devices through a charge generation layer, so as to improve the current efficiency, prolong the device life, and meet the brightness of illumination use. However, the stacked OLED device has some display problems. SUMMARY

[0003] Therefore, it is necessary to provide a display panel and a display device to solve at least one of the above problems.

[0004] In a first aspect, an embodiment of the present application provides a display panel, which comprises:

[0005] a substrate;

[0006] a partition structure arranged on the substrate and defining a plurality of first openings; and

[0007] a plurality of light-emitting elements arranged on the substrate and corresponding to the plurality of first openings.

[0008] The light-emitting element comprises at least two light-emitting units arranged in layers, and the light-emitting unit comprises a light-emitting layer and a functional film layer arranged in layers.

[0009] At least one functional film layer of the at least two light-emitting units is electrically connected to the partition structure.

[0010] The display panel provided by the embodiment of the present application makes at least one functional film layer of all functional film layers of at least two light-emitting units of the light-emitting element electrically connected to the partition structure, so that there is a leakage path in the light-emitting element, thereby improving the demand for TFT current. In this way, compared with the display panel in the related art, under the same preparation process conditions, the display panel of the present application has higher current demand under the same brightness, improves the working state of the TFT, and thus reduces the adverse effects of process defects of the TFT on the stability of the TFT current, improves the display effect of the display panel, that is, improves the mura phenomenon of the display panel.

[0011] In one of the embodiments, the light emitting element further comprises a first electrode and a second electrode arranged in a stack, and the at least two light emitting units are located between the first electrode and the second electrode;

[0012] The at least two light emitting units comprise:

[0013] a first light emitting unit arranged on a side of the first electrode away from the substrate; and

[0014] at least one second light emitting unit arranged on a side of the first light emitting unit away from the substrate;

[0015] wherein at least one of the functional film layers of the first light emitting unit is electrically connected to the partition structure;

[0016] Optionally, the functional film layer adjacent to the first electrode among all the functional film layers of the first light emitting unit is electrically connected to the partition structure.

[0017] In this way, the manufacturing difficulty of the light emitting unit can be reduced.

[0018] In one of the embodiments, the first light emitting unit comprises:

[0019] at least one first functional film layer arranged on a side of the first electrode away from the substrate;

[0020] a first light emitting layer arranged on a side of the at least one first functional film layer away from the substrate; and

[0021] at least one second functional film layer arranged on a side of the first light emitting layer away from the substrate;

[0022] wherein the at least one first functional film layer is electrically connected to the partition structure.

[0023] Optionally, the first functional film layer adjacent to the first electrode is electrically connected to the partition structure.

[0024] Optionally, a first distance is provided between the center of the light emitting layer and the sidewall of the partition structure; a first size is provided between the center of the first functional film layer adjacent to the first electrode and the end of the first functional film layer close to the partition structure; and the first size is not less than the first distance.

[0025] Optionally, the first light emitting unit comprises a plurality of first functional film layers arranged in a stack, and the plurality of first functional film layers comprise a hole injection layer, a first hole transport layer and a first optical adjustment layer arranged in a stack on a side of the first electrode away from the substrate; and the hole injection layer is electrically connected to the partition structure.

[0026] Optionally, the first light-emitting unit comprises a plurality of second functional film layers arranged in a stack, and the plurality of second functional film layers comprise a first hole-blocking layer and a first electron-transporting layer arranged in a stack on a side of the first light-emitting layer away from the substrate.

[0027] Optionally, the plurality of functional film layers of the second light-emitting unit comprise:

[0028] at least one third functional film layer arranged on a side of the charge generation layer away from the substrate;

[0029] a second light-emitting layer arranged on a side of the at least one third functional film layer away from the substrate; and

[0030] at least one fourth functional film layer arranged on a side of the second light-emitting layer away from the substrate;

[0031] Optionally, the second light-emitting unit comprises a plurality of third functional film layers arranged in a stack, and the plurality of third functional film layers comprise a second hole-transporting layer and a second optical adjustment layer arranged in a stack on a side of the charge generation layer away from the substrate.

[0032] Optionally, the second light-emitting unit comprises a plurality of fourth functional film layers arranged in a stack, and the plurality of fourth functional film layers comprise a second hole-blocking layer and a second electron-transporting layer arranged in a stack on a side of the second light-emitting layer away from the substrate.

[0033] In this way, the light-emitting effect of the light-emitting element can be improved.

[0034] In one of the embodiments, a charge generation layer is arranged between any two adjacent light-emitting units; and the charge generation layer is arranged apart from the partition structure.

[0035] Optionally, the orthographic projection of the charge generation layer on the substrate is located within the orthographic projection of the functional film layer electrically connected to the partition structure on the substrate.

[0036] Optionally, a first distance is present between the center of the light-emitting layer and the sidewall of the partition structure; a second distance is present between the center of the charge generation layer and an end of the charge generation layer close to the partition structure; and the second distance is smaller than the first distance.

[0037] In this way, the leakage of the charge generation layer can be avoided, and thus the device efficiency can be improved.

[0038] In one of the embodiments, the light-emitting element comprises at least two charge generation layers, and the light-emitting unit is arranged between any two adjacent charge generation layers; and the light-emitting unit arranged between the two adjacent charge generation layers is a target light-emitting unit.

[0039] The outer contour of the orthographic projection of the at least one film layer of the target light emitting unit on the substrate is located in the periphery of the orthographic projection of any one of the two charge generation layers adjacent to the target light emitting unit on the substrate.

[0040] Optionally, the third dimension between the center of the at least one film layer of the target light emitting unit and the end of the at least one film layer close to the partition structure is not less than the second dimension of any one of the two charge generation layers adjacent to the target light emitting unit.

[0041] Optionally, the orthographic projection of the at least two charge generation layers on the substrate is located in the orthographic projection of the light emitting unit on the substrate.

[0042] In this way, the current can be effectively transmitted in the light emitting element.

[0043] Optionally, the film layer with the largest thickness in the plurality of functional film layers and the light emitting layer of the target light emitting unit has an outer contour of the orthographic projection on the substrate located in the periphery of the orthographic projection of any one of the two charge generation layers adjacent to the target light emitting unit on the substrate.

[0044] In this way, the blocking effect can be better.

[0045] Optionally, the film layer with the lowest charge mobility in the plurality of functional film layers and the light emitting layer of the target light emitting unit has an outer contour of the orthographic projection on the substrate located in the periphery of the orthographic projection of any one of the two charge generation layers adjacent to the target light emitting unit on the substrate.

[0046] In this way, the blocking effect can be better.

[0047] In one of the embodiments, the second electrode of the light emitting element is electrically connected with the partition structure.

[0048] Optionally, the outer contour of the orthographic projection of the second electrode on the substrate is located in the periphery of the orthographic projection of the bottom surface of the partition structure on the substrate.

[0049] Optionally, the first distance between the center of the light emitting layer and the side wall of the partition structure is not less than the fourth dimension between the center of the second electrode and the end of the second electrode close to the partition structure.

[0050] In this way, the transmission of the electrical signal by the partition structure can optimize the layout of the display area.

[0051] In one of the embodiments, the partition structure comprises an isolation body and a blocking portion which are arranged on the substrate in a stacked manner, and the second electrode of the light emitting element is electrically connected with the isolation body;

[0052] Optionally, the second electrode of the light emitting element is in direct contact with the isolation body.

[0053] Optionally, the outer contour of the orthographic projection of the second electrode on the substrate is located outside the outer contour of the orthographic projection of the functional film layer electrically connected with the isolation body on the substrate.

[0054] Optionally, the fifth size between the center of the functional film layer electrically connected with the isolation body and the end of the functional film layer close to the partition structure is not greater than the fourth size.

[0055] Optionally, the outer contour of the orthographic projection of the blocking portion on the substrate is located at the periphery of the outer contour of the orthographic projection of the isolation body on the substrate.

[0056] Optionally, the material of the isolation body comprises at least one of metal and metal oxide.

[0057] In this way, the partition effect of the partition structure can be better, and meanwhile, the second electrode of the light emitting element can be connected with the driving circuit through the isolation body, so that the wiring arrangement of the display area is more optimized.

[0058] In one of the embodiments, the partition structure further comprises a conductive portion arranged on the substrate, the conductive portion is connected to the end of the isolation body close to the substrate and extends towards the center of the first opening.

[0059] Among the at least two light emitting units, at least one functional film layer is electrically connected with the conductive portion.

[0060] Optionally, the second electrode of the light emitting element is electrically connected with the conductive portion.

[0061] In one of the embodiments, the substrate comprises a pixel definition layer, the pixel definition layer is provided with a plurality of pixel openings; the light emitting element is arranged in the pixel opening, and the partition structure is arranged on the pixel definition layer, and each pixel opening is in communication with the first opening.

[0062] Optionally, the plurality of pixel openings are in one-to-one correspondence with the plurality of first openings.

[0063] In this way, the light emitting element can be arranged on the substrate.

[0064] In a second aspect, the embodiments of the present application provide a display device, which comprises the display panel of any one of the first aspect.

[0065] The display device provided by the embodiment of the present application has at least one functional film layer in all functional film layers of at least two light emitting units of the light emitting element electrically connected with the partition structure, so that the light emitting element has a leakage path, thereby improving the demand for TFT current. In this way, under the same preparation process condition, the display panel of the present application has higher current demand under the same brightness, improves the working state of the TFT, and further reduces the adverse effect of process defects of the TFT on the stability of the TFT current, thereby improving the display effect of the display panel, i.e., improving the mura phenomenon of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0067] Figure 1 A cross-sectional structure schematic diagram of a display panel provided by an embodiment of the present application.

[0068] Figure 2A A partial structure schematic diagram of the display panel shown in FIG. 1. Figure 1

[0069] Figure 2B A partial size schematic diagram of the display panel shown in FIG. 1. Figure 1

[0070] Figure 3 A cross-sectional structure schematic diagram of another display panel provided by an embodiment of the present application.

[0071] Figure 4 A partial structure schematic diagram of the display panel shown in FIG. 2. Figure 3

[0072] A partial top view schematic diagram of still another display panel provided by an embodiment of the present application. Figure 5

[0073] A structure schematic diagram of a display device provided by an embodiment of the present application. Figure 6 BRIEF DESCRIPTION OF DRAWINGS

[0074]

[0075] ​​​1, display device; 10, display panel; 11, substrate; 111, base; 112, pixel definition layer; 112a, pixel opening; 12, partition structure; 12a, first opening; 121, spacer; 122, barrier portion; 123, conductive portion; 13, light emitting element; 131, light emitting unit; 131a, first light emitting unit; 131b, second light emitting unit; 1311, light emitting layer; 1311a, first light emitting layer; 1311b, second light emitting layer; 1312, functional film layer; 13121, hole injection layer; 13122, first hole transport layer; 13123, first optical adjustment layer; 13124, first hole blocking layer; 13125, first electron transport layer; 13126, second hole transport layer; 13127, second optical adjustment layer; 13128, second hole blocking layer; 13129, second electron transport layer; 132, first electrode; 133, second electrode; 134, charge generation layer. DETAILED DESCRIPTION

[0076] For the purposes of this application, reference will be made to the accompanying drawings in which preferred embodiments of the application are illustrated. It should be understood that the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be apparent that the scope of the application is not limited to the embodiments set forth herein.

[0077] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0078] Spatially relative terms, such as "upper" and "lower", "right" and "left", and the like, are used herein for ease of description to explain the positioning of one element relative to another element. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0079] In the drawings, the size of layers and regions can be exaggerated for clarity. It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present. Also, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers can also be present. In addition, like reference numerals are used throughout the drawings to denote like elements.

[0080] Hereinafter, although terms such as "first", "second", etc. can be used to describe various components, the components are not necessarily limited to the above terms. The above terms are used only to distinguish one component from another component. It will also be understood that an expression used in the singular encompasses an expression used in the plural, unless the context clearly dictates otherwise. In addition, in the following embodiments, it will also be understood that the terms "comprise" and / or "have" used herein indicate the presence of stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0081] In the following embodiments, when a layer, region, or element is "connected", it can be interpreted as not only being directly connected but also being connected through another constituent element placed therebetween. For example, when a layer, region, element, etc. is described as being connected or electrically connected, the layer, region, element, etc. can be connected or electrically connected not only directly but also through another layer, region, element, etc. placed therebetween.

[0082] As used in the specification, the term "and / or" includes any and all combinations of one or more of the associated listed items. When phrases such as "at least one of (a), (b), and (c)" are used, it is meant to include any one of (a), (b), or (c) individually, as well as any combination of (a), (b), and (c) taken in various orders.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0084] It will also be understood that the terms "comprise / comprising" or "have / having" etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0085] It should also be understood that in interpreting the elements, although not explicitly described, the elements are interpreted to include an error range that should be within an acceptable deviation range of the specific value determined by the person skilled in the art. For example, "about", "approximately" or "substantially" can mean within one or more standard deviations, without limitation.

[0086] Furthermore, in the specification, the phrase "plan view schematic diagram" refers to a drawing when the target portion is viewed from above, and the phrase "cross-sectional view schematic diagram" refers to a drawing when a section is taken by cutting the target portion vertically and viewed from the side.

[0087] Furthermore, the drawings are not drawn to scale 1:1, and the relative sizes of the elements are only drawn by way of example in the drawings, and are not necessarily drawn according to the true scale.

[0088] In the related art, the TFT produces a process defect in the manufacturing process, and due to the high current efficiency of the stacked device, in the control process of the TFT, the high efficiency will amplify the process defect, resulting in a decrease in the control accuracy of the TFT on the current, and this phenomenon is particularly obvious at low gray levels, thereby causing the display panel to produce a mura phenomenon.

[0089] In view of at least one of the above problems, the embodiments of the present application provide a display panel and a display device, by electrically connecting at least one functional film layer in all functional film layers of at least two light emitting units of a light emitting element to a partition structure, so that there is a leakage path in the light emitting element, to increase the demand for TFT current. In this way, compared with the display panel in the related art, under the same preparation process conditions, since the display panel of the present application has a higher current demand at the same brightness, the working state of the TFT is improved, thereby reducing the adverse effects of the process defects of the TFT on the stability of the TFT current, and improving the display effect of the display panel, i.e. improving the mura phenomenon of the display panel.

[0090] In a first aspect, referring to Figure 1 and Figure 2A The embodiments of the present application provide a display panel 10, which comprises:

[0091] a substrate 11;

[0092] a partition structure 12 provided on the substrate 11 and defining a plurality of first openings 12a; and

[0093] a plurality of light emitting elements 13 arranged at intervals on the substrate 11 and arranged correspondingly in the plurality of first openings 12a;

[0094] The light emitting element 13 includes at least two light emitting units 131 stacked together, each of which includes a light emitting layer 1311 and a functional film layer 1312 stacked together.

[0095] The at least one functional film layer 1312 in the at least two light emitting units 131 is electrically connected to the partition structure 12.

[0096] Here, the substrate 11 can be an array substrate provided with a pixel definition layer 112. The partition structure 12 refers to a structure that can partition the light emitting material of adjacent light emitting elements 13. In one example, the partition structure 12 can be a single-layer structure, and in another example, the partition structure 12 can also be a laminated structure. The light emitting element 13 is a laminated light emitting device. The "a plurality of light emitting elements 13 are arranged in the plurality of first openings 12a" can be that one light emitting element 13 corresponds to one first opening 12a, or a plurality of light emitting elements 13 correspond to one first opening 12a. It should be noted that each light emitting unit 131 can include a plurality of functional film layers 1312.

[0097] It can be understood that the partition structure 12 in the embodiment of the present application not only has a partitioning function, but also has a conductive function, so that part of the electric charge in the at least one functional film layer 1312 can be conducted to the partition structure 12.

[0098] The display panel 10 provided by the embodiment of the present application is configured to electrically connect at least one functional film layer 1312 in all functional film layers 1312 of the at least two light emitting units 131 of the light emitting element 13 to the partition structure 12, so that the light emitting element 13 has a leakage path, thereby increasing the demand for TFT current. In this way, compared with the related art, under the same preparation process conditions, the display panel 10 of the present application has a higher current demand under the same brightness, improves the working state of the TFT, and thus reduces the adverse effects of process defects of the TFT on the stability of the TFT current, and improves the display effect of the display panel 10, that is, improves the mura phenomenon of the display panel 10.

[0099] In one embodiment, the light emitting element 13 further includes a first electrode 132 and a second electrode 133 stacked together, and the at least two light emitting units 131 are located between the first electrode 132 and the second electrode 133.

[0100] The at least two light emitting units 131 include:

[0101] a first light emitting unit 131a located on a side of the first electrode 132 away from the substrate 11; and

[0102] at least one second light emitting unit 131b located on a side of the first light emitting unit 131a away from the substrate 11;

[0103] The at least one functional film layer 1312 of the first light emitting unit 131a is electrically connected to the partition structure 12.

[0104] It should be noted that when a certain functional film layer 1312 is electrically connected to the partition structure 12, the outer contour of the orthographic projection of the functional film layer 1312 on the substrate 11 is located in the periphery of the orthographic projection of other functional film layers 1312 on the substrate 11, that is, the width (the size in the direction parallel to the plane where the substrate 11 is located) of the functional film layer 1312 is greater than the width (the size in the direction parallel to the plane where the substrate 11 is located) of other functional film layers 1312.

[0105] Therefore, when the light emitting element 13 is manufactured, in order to electrically connect a certain functional film layer 1312 to the partition structure 12, the width of the functional film layer 1312 needs to be relatively large. By electrically connecting the functional film layer 1312 of the light emitting unit 131 located below to the partition structure 12, the morphology of the functional film layer 1312 of the light emitting unit 131 located above can be conveniently controlled, thereby reducing the manufacturing difficulty of the light emitting unit 131.

[0106] In one embodiment, the functional film layer 1312 adjacent to the first electrode 132 among all the functional film layers 1312 of the first light emitting unit 131a is electrically connected to the partition structure 12.

[0107] In this way, when the light emitting element 13 is manufactured, the functional film layer 1312 with the largest width is first formed on the first electrode 132, and then other functional film layers 1312 with smaller widths are sequentially formed on the functional film layer 1312 with the largest width, thereby facilitating the subsequent process to control the morphology of other functional film layers 1312, and reducing the manufacturing difficulty of the light emitting element 13.

[0108] In another embodiment, a plurality of functional film layers 1312 in the light emitting element 13 are electrically connected to the partition structure 12, so that part of the electric charges in the plurality of functional film layers 1312 can be conducted to the partition structure 12.

[0109] In this way, the leakage current can be made larger, thereby better improving the mura phenomenon of the display panel 10.

[0110] In one embodiment, the first light emitting unit 131a includes:

[0111] at least one first functional film layer arranged on the side of the first electrode 132 away from the substrate 11;

[0112] a first light emitting layer 1311a arranged on the side of the at least one first functional film layer away from the substrate 11; and

[0113] at least one second functional film layer arranged on the side of the first light emitting layer 1311a away from the substrate 11;

[0114] At least one of the first functional membrane layers is electrically connected to the partition structure 12.

[0115] In this way, when fabricating the light-emitting element 13, the first functional film layer with the largest width is first formed on the first electrode 132, and then other film layers with smaller widths are formed sequentially on the first functional film layer. This makes it easier to control the morphology of other film layers in subsequent processes, thereby reducing the fabrication difficulty of the light-emitting element 13.

[0116] It should be noted that when the first light-emitting unit 131a includes a first functional film layer, the first functional film layer can be at least one of a hole injection layer, a hole transport layer, an electron blocking layer, etc. When the first light-emitting unit 131a includes a second functional film layer, the second functional film layer can be at least one of a hole blocking layer, an electron transport layer, an electron injection layer, etc.

[0117] In one embodiment, a first functional film layer 1312 disposed adjacent to the first electrode 132 is electrically connected to the partition structure 12.

[0118] In this way, when fabricating the light-emitting element 13, the first functional film layer with the largest width is first formed on the first electrode 132, and then other film layers with smaller widths are formed sequentially on the first functional film layer. This makes it easier to control the morphology of other film layers in subsequent processes, thereby reducing the fabrication difficulty of the light-emitting element 13.

[0119] In one embodiment, reference Figure 2B As shown, there is a first distance L1 between the center of the light-emitting layer 1311 and the sidewall of the partition structure 12. The center of the first functional film layer 1312, which is disposed adjacent to the first electrode 132, has a first dimension W1 between it and the end of the first functional film layer 1312 near the partition structure 12. The first dimension W1 is not less than the first distance L1.

[0120] Specifically, the first distance L1 refers to the distance between the center of the light-emitting layer 1311 and the sidewall at the bottom of the partition structure 12.

[0121] In one example, the sidewall of the partition structure 12 is a vertical surface, and the first functional membrane layer 1312 is in contact with the partition structure 12 to achieve electrical connection between the two. At this time, the first dimension W1 is equal to the first distance L1.

[0122] In another example, such as Figure 2B As shown, the sidewall of the partition structure 12 is an inclined surface, and the first functional membrane layer 1312 is attached to the sidewall of the partition structure 12. At this time, the first dimension W1 is greater than the first distance L1.

[0123] In one of the embodiments, the first light emitting unit 131a comprises a plurality of first functional film layers arranged in a stack, the plurality of first functional film layers comprising a hole injection layer 13121, a first hole transport layer 13122 and a first optical adjustment layer 13123 arranged in a stack on a side of the first electrode 132 facing away from the substrate 11; the hole injection layer 13121 is electrically connected to the partition structure 12.

[0124] It should be noted that, by electrically connecting the hole injection layer 13121 to the partition structure 12, on the one hand, the difficulty of manufacturing the light emitting element 13 can be minimized, and on the other hand, the leakage capacity of the hole injection layer 13121 is moderate, which can improve the mura phenomenon of the display panel 10 and minimize the power consumption of the display panel 10.

[0125] In one of the embodiments, the first light emitting unit 131a comprises a plurality of second functional film layers arranged in a stack, the plurality of second functional film layers comprising a first hole blocking layer 13124 and a first electron transport layer 13125 arranged in a stack on a side of the first light emitting layer 1311a facing away from the substrate 11.

[0126] In this way, the light emitting effect of the light emitting element 13 can be better.

[0127] In one of the embodiments, the plurality of functional film layers 1312 of the second light emitting unit 131b comprises:

[0128] at least one third functional film layer arranged on a side of the charge generation layer 134 facing away from the substrate 11;

[0129] a second light emitting layer 1311b arranged on a side of the at least one third functional film layer facing away from the substrate 11; and

[0130] at least one fourth functional film layer arranged on a side of the second light emitting layer 1311b facing away from the substrate 11.

[0131] Here, it should be noted that, when the second light emitting unit 131b comprises one third functional film layer, the third functional film layer can be at least one of a hole injection layer, a hole transport layer, an electron blocking layer, etc. When the second light emitting unit 131b comprises one fourth functional film layer, the fourth functional film layer can be at least one of a hole blocking layer, an electron transport layer, an electron injection layer, etc.

[0132] In one of the embodiments, the second light emitting unit 131b comprises a plurality of third functional film layers arranged in a stack, the plurality of third functional film layers comprising a second hole transport layer 13126 and a second optical adjustment layer 13127 arranged in a stack on a side of the charge generation layer 134 facing away from the substrate 11.

[0133] In this way, the light emitting effect of the light emitting element 13 can be better.

[0134] In one of the embodiments, the second light emitting unit 131b comprises a plurality of fourth functional film layers arranged in a stack, and the plurality of fourth functional film layers comprises a second hole blocking layer 13128 and a second electron transport layer 13129 arranged in a stack on the side of the second light emitting layer 1311b facing away from the substrate 11.

[0135] In this way, the light emitting effect of the light emitting element 13 can be better.

[0136] In one of the embodiments, a charge generation layer 134 is arranged between any two adjacent light emitting units 131. The charge generation layer 134 is arranged apart from the partition structure 12.

[0137] It can be understood that the charge generation layer 134 can generate equal amounts of electrons and holes, and transmit them to the two light emitting layers 1311 on the two sides respectively, so that the two light emitting layers 1311 emit light. The charge generation layer 134 can comprise a p-type charge generation layer and an n-type charge generation layer arranged in a stack. The p-type charge generation layer and the n-type charge generation layer constitute an organic semiconductor heterojunction. By using the high-efficiency charge generation effect of the organic semiconductor heterojunction, the injection efficiency of the charge generation layer 134 to the carriers is improved, which is conducive to improving the display effect of the display panel 10.

[0138] Here, apart from each other means that the charge generation layer 134 and the partition structure 12 have a spacing. Since the charge generation layer 134 has strong leakage capability, by arranging the charge generation layer 134 apart from the partition structure 12, the current efficiency of the display panel 10 can be ensured.

[0139] In one of the embodiments, as shown in Figure 1 , the orthographic projection of the charge generation layer 134 on the substrate 11 is located within the orthographic projection of the functional film layer 1312 on the substrate 11 which is electrically connected to the partition structure 12. That is, the width (the size in the direction parallel to the plane where the substrate 11 is located) of the functional film layer 1312 which is electrically connected to the partition structure 12 is greater than the width (the size in the direction parallel to the plane where the substrate 11 is located) of the charge generation layer 134.

[0140] It can be understood that in this way, the charge generation layer 134 and the partition structure 12 can have a spacing. In this way, the leakage of the charge generation layer 134 can be avoided, and the current efficiency of the display panel 10 can be ensured.

[0141] In one of the embodiments, as shown in Figure 2B and Figure 4 , the center of the light emitting layer 1311 and the side wall of the partition structure 12 have a first distance L1. The center of the charge generation layer 134 and the end of the charge generation layer 134 close to the partition structure 12 have a second size W2. The second size W2 is less than the first distance L1.

[0142] In this way, the charge generation layer 134 is equivalent to not being in contact with the partition structure 12. In this way, the charge generation layer 134 can be prevented from leaking electricity, and the current efficiency of the display panel 10 can be ensured.

[0143] In one embodiment, referring to FIG. 1, the light emitting element 13 includes at least two charge generation layers 134, and a light emitting unit 131 is arranged between any two adjacent charge generation layers 134, and the light emitting unit 131 is a target light emitting unit. That is, the light emitting element 13 includes at least three light emitting units 131. Figure 3

[0144] In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.

[0145] In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.

[0146] In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.

[0147] In one embodiment, referring to FIG. 1, the light emitting element 13 includes at least two charge generation layers 134, and a light emitting unit 131 is arranged between any two adjacent charge generation layers 134, and the light emitting unit 131 is a target light emitting unit. That is, the light emitting element 13 includes at least three light emitting units 131. Figure 4 In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.

[0148] In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.

[0149] In this way, the at least one film layer is completely located between the two charge generation layers 134, so as to isolate the two charge generation layers 134, thereby ensuring that the current can be effectively transmitted in the light emitting element 13.​

[0150] In one embodiment, among the functional film layers 1312 and the light emitting layer 1311 of the target light emitting unit, the film layer with the largest thickness has a normal projection outer contour on the substrate 11 that is located outside the normal projection outer contour on the substrate 11 of any one of the two charge generation layers 134 adjacent to the target light emitting unit. That is, the width (dimension in the plane direction of the substrate 11) of the film layer with the largest thickness is greater than the width (dimension in the plane direction of the substrate 11) of at least one of the charge generation layers 134.

[0151] In this way, the “separation layer” between the two charge generation layers 134 can have a larger thickness, so that the separation effect of the “separation layer” is better.

[0152] In one embodiment, among the functional film layers 1312 and the light emitting layer 1311 of the target light emitting unit, the film layer with the lowest charge mobility has a normal projection outer contour on the substrate 11 that is located outside the normal projection outer contour on the substrate 11 of any one of the two charge generation layers 134 adjacent to the target light emitting unit. That is, the width (dimension in the plane direction of the substrate 11) of the film layer with the lowest charge mobility is greater than the width (dimension in the plane direction of the substrate 11) of at least one of the charge generation layers 134.

[0153] In this way, the “separation layer” between the two charge generation layers 134 can have a lower electron mobility, so that the separation effect of the “separation layer” is better.

[0154] Please refer to Figure 4 As shown in FIG. 13B, a second hole transport layer 13126, a second optical adjustment layer 13127, a second light emitting layer 1311b, a second hole blocking layer 13128, and a second electron transport layer 13129 are arranged in layers between the two adjacent charge generation layers 134. Among them, the second hole transport layer 13126 is completely located between the two charge generation layers 134 to separate the two charge generation layers 134. Since the thickness of the second hole transport layer 13126 is relatively thick among the above-mentioned film layers, and the electron mobility of the second hole transport layer 13126 is relatively strong among the above-mentioned film layers, the above-mentioned arrangement can achieve a better separation effect. In addition, the above-mentioned arrangement can also reduce the difficulty of manufacturing the light emitting element 13.

[0155] It should be noted that the normal projection outer contour of the plurality of film layers on the substrate 11 can also be located outside the normal projection outer contour on the substrate 11 of any one of the two charge generation layers 134. In this way, the separation effect can be better. The embodiments of the present application do not limit this.

[0156] In one embodiment, the partition structure 12 is used to transmit electrical signals, and the second electrode 133 of the light-emitting element 13 is electrically connected to the partition structure 12 so that the second electrode 133 is electrically connected to the partition structure 12.

[0157] In this way, the second electrode 133 of the light-emitting element 13 can be connected to the driving circuit through the partition structure 12, so that the wiring layout of the display area is more optimized. At the same time, the partition structure 12 can not only transmit electrical signals, but also become a leakage path for the functional film layer 1312.

[0158] In one embodiment, the outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the bottom surface of the partition structure 12 on the substrate 11.

[0159] like Figure 2B As shown, the sidewall of the partition structure 12 is an inclined surface. The second electrode 133 is in contact with the sidewall of the partition structure 12. Since the second electrode 133 is located on the side of the bottom surface of the partition structure 12 away from the substrate 11, the outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the bottom surface of the partition structure 12 on the substrate 11.

[0160] In one embodiment, reference Figure 2B As shown, there is a first distance L1 between the center of the light-emitting layer 1311 and the sidewall of the partition structure 12. There is a fourth dimension W4 between the center of the second electrode 133 and the end of the second electrode 133 near the partition structure 12. The fourth dimension W4 is not less than the first distance L1.

[0161] In one example, the sidewall of the partition structure 12 is a vertical surface, and the second electrode 133 is in contact with the partition structure 12 to achieve electrical connection between the two. At this time, the fourth dimension W4 is equal to the first distance L1.

[0162] In another example, such as Figure 2B As shown, the sidewall of the partition structure 12 is an inclined surface, and the second electrode 133 is in contact with the partition structure 12. Since the second electrode 133 is located on the bottom surface of the partition structure 12 away from the substrate 11, the fourth dimension W4 is greater than the first distance L1.

[0163] In one embodiment, the partition structure 12 includes an isolator 121 and a blocking portion 122 stacked on the substrate 11, wherein the isolator 121 is used to transmit electrical signals. The second electrode 133 of the light-emitting element 13 is electrically connected to the isolator 121. Further, in the at least two light-emitting units 131, at least one functional film layer 1312 is electrically connected to the isolator 121.

[0164] In this way, the partitioning effect of the partition structure 12 is better, and the second electrode 133 of the light emitting element 13 is connected to the driving circuit through the isolation body 121, so that the wiring arrangement of the display area is optimized.

[0165] In one of the embodiments, the outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the functional film layer 1312 electrically connected to the isolation body 121 on the substrate 11.

[0166] In this way, the contact between the second electrode 133 and the isolation body 121 is more sufficient, and the electrical connection effect between the second electrode 133 and the isolation body 121 is improved.

[0167] In one of the embodiments, referring to Figure 2B As shown in the figure, the fifth size W5 between the center of the functional film layer 1312 electrically connected to the isolation body 121 and the end of the functional film layer 1312 close to the partition structure 12 is not greater than the fourth size W4.

[0168] In one example, the side wall of the isolation body 121 is a vertical surface, the functional film layer 1312 and the second electrode 133 are both in contact with the isolation body 121, and the fifth size W5 is equal to the fourth size W4.

[0169] In another example, the side wall of the isolation body 121 is an inclined surface, i.e., the isolation body 121 has a structure of being small at the top and large at the bottom, and further, the longitudinal cross-sectional shape of the isolation body 121 is preferably a right trapezoid. The second electrode 133 is located on the side of the functional film layer 1312 away from the substrate 11, i.e., the second electrode 133 is located directly above the functional film layer 1312. When the functional film layer 1312 and the second electrode 133 are both in contact with the isolation body 121, the fifth size W5 is greater than the fourth size W4.

[0170] In one of the embodiments, the outer contour of the orthographic projection of the blocking portion 122 on the substrate 11 is located outside the outer contour of the orthographic projection of the isolation body 121 on the substrate 11.

[0171] In this way, the partition structure 12 forms an undercut structure of being large at the top and small at the bottom, and the undercut structure can block the light emitting material of the light emitting element 13 when the light emitting element 13 is evaporated.

[0172] In one of the embodiments, the second electrode 133 of the light emitting element 13 is in direct contact with the isolation body 121.

[0173] In this way, the functional film layer 1312 is prevented from being located between the second electrode 133 and the isolation body 121, so that the conduction resistance between the second electrode 133 and the isolation body 121 is reduced.

[0174] In one embodiment, the material of the separator 121 includes at least one of a metal and a metal oxide. Exemplary examples include silver, copper, titanium, aluminum, etc. Metal oxides may include tin oxide, zinc oxide, cadmium oxide, indium oxide, indium tin oxide, zinc indium oxide, zinc gallium oxide, zinc aluminum oxide, titanium tantalum oxide, etc.

[0175] In one embodiment, the outer contour of the orthographic projection of the second electrode 133 on the substrate 11 is located outside the outer contour of the orthographic projection of the functional film layer 1312 electrically connected to the insulator 121 on the substrate 11. That is, the width of the second electrode 133 (the dimension parallel to the plane of the substrate 11) is greater than the width of the functional film layer 1312 electrically connected to the insulator 121 (the dimension parallel to the plane of the substrate 11).

[0176] In one embodiment, reference Figure 3 As shown, the partition structure 12 further includes a conductive portion 123 disposed on the substrate 11. The conductive portion 123 is connected to one end of the insulator 121 near the substrate 11 and extends toward the center of the first opening 12a. That is, one end of the conductive portion 123 is connected to the insulator 121, and the other end of the conductive portion 123 is connected to the second electrode 133. At least one functional film layer 1312 of the light-emitting element 13 is electrically connected to the conductive portion 123.

[0177] Furthermore, the second electrode 133 of the light-emitting element 13 is electrically connected to the conductive part 123.

[0178] Here, the conductive part 123 is equivalent to the medium for electrically connecting the second electrode 133 and the functional film layer 1312 with the insulator 121. By providing the conductive part 123, it is convenient to electrically connect the second electrode 133, the functional film layer 1312 and the insulator 121.

[0179] It is understood that the conductive portion 123 may be disposed at the root of the insulator 121 and extend toward the center of the light-emitting element 13. Furthermore, the conductive portion 123 may be integrally disposed with the insulator 121. The material of the conductive portion 123 includes at least one of metal and metal oxide.

[0180] It should be noted that when the partition structure 12 includes the conductive part 123, the first distance L1 refers to the distance between the center of the light-emitting layer 1311 and the sidewall of the conductive part 123.

[0181] In one embodiment, the substrate 11 includes a pixel definition layer 112, on which a plurality of pixel openings 112a are provided; a light-emitting element 13 is disposed in the pixel opening 112a, and a partition structure 12 is disposed on the pixel definition layer 112, wherein each pixel opening 112a is connected to a first opening 12a.

[0182] By setting the pixel opening 112a on the pixel definition layer 112, the light emitting element 13 can be conveniently set on the substrate 11.

[0183] In one of the embodiments, the plurality of pixel openings 112a are in one-to-one correspondence with the plurality of first openings 12a. Here, it should be noted that the one-to-one correspondence means that each first opening 12a corresponds to one pixel opening 112a.

[0184] In another of the embodiments, one first opening 12a corresponds to a plurality of pixel openings 112a, and the same kind of light emitting element 13 is set in each of the pixel openings 112a corresponding to the first opening 12a.

[0185] In this way, the display panel 10 can have a better display effect.

[0186] It should be noted that please refer to Figure 5 As shown in FIG. 1, the light emitting element 13 at least includes a blue light emitting element 13, a green light emitting element 13 and a red light emitting element 13. The areas of the orthographic projections of the light emitting elements 13 of different colors on the substrate 11 can be different. Therefore, the areas of the orthographic projections of the second electrodes 133 of the light emitting elements 13 of different colors on the substrate 11 can be different, and the areas of the orthographic projections of the functional film layers 1312 of the light emitting elements 13 of different colors on the substrate 11 can be different.

[0187] In a second aspect, referring to FIG. 1, the embodiments of the present application provide a display device 1, which includes the display panel 10 of any one of the embodiments of the first aspect. Figure 6

[0188] The display device can be a mobile or fixed terminal having the display panel 10, such as a mobile phone, a television, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a Personal Digital Assistant (PDA), a navigation device, a smart watch, a virtual reality device, etc.

[0189] ​The display device 1 provided by the embodiment of the present application is characterized in that at least one functional film layer 1312 of all the functional film layers 1312 of at least two light emitting units 131 of the light emitting element 13 is electrically connected with the partition structure 12, so that the light emitting element 13 has a leakage path, thereby improving the demand for TFT current. In this way, compared with the display panel in the related art, under the same preparation process condition, the current demand of the display panel 10 of the present application is higher under the same brightness, the working state of the TFT is improved, thereby reducing the adverse effect of the process defect of the TFT on the stability of the TFT current, and the display effect of the display device 1 is improved, that is, the mura phenomenon of the display panel 10 of the display device 1 is improved.

[0190] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0191] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A display panel, characterized by, The application relates to a light-emitting element, comprising: a substrate; a partition structure arranged on the substrate and defining a plurality of first openings; and a plurality of light-emitting elements arranged on the substrate and corresponding to the plurality of first openings; wherein the light-emitting element comprises at least two light-emitting units arranged in layers, and each light-emitting unit comprises a light-emitting layer and a functional film layer arranged in layers; at least one functional film layer of the at least two light-emitting units is electrically connected to the partition structure; and a charge generation layer is arranged between any two adjacent light-emitting units and spaced apart from the partition structure. The light-emitting element further comprises a first electrode and a second electrode arranged in layers, and the at least two light-emitting units are located between the first electrode and the second electrode; 2. The display panel of claim 1, wherein, the at least two light-emitting units comprise: a first light-emitting unit arranged on a side of the first electrode away from the substrate; and at least one second light-emitting unit arranged on a side of the first light-emitting unit away from the substrate; wherein at least one functional film layer of the first light-emitting unit is electrically connected to the partition structure. The first light-emitting unit comprises:

3. The display panel of claim 2, wherein, at least one first functional film layer arranged on a side of the first electrode away from the substrate; a first light-emitting layer arranged on a side of the at least one first functional film layer away from the substrate; and at least one second functional film layer arranged on a side of the first light-emitting layer away from the substrate; wherein the at least one first functional film layer is electrically connected to the partition structure. The first functional film layer adjacent to the first electrode is electrically connected to the partition structure.

4. The display panel of claim 3, wherein, The center of the light-emitting layer and the side wall of the partition structure have a first distance; the center of the first functional film layer adjacent to the first electrode and the end of the first functional film layer close to the partition structure have a first size; and the first size is not less than the first distance.

5. The display panel of claim 4, wherein, The first light-emitting unit comprises a plurality of first functional film layers arranged in layers, and the plurality of first functional film layers comprise a hole injection layer, a first hole transport layer and a first optical adjustment layer arranged in layers on a side of the first electrode away from the substrate; and the hole injection layer is electrically connected to the partition structure.

6. The display panel of claim 4, wherein, The first light-emitting unit comprises a plurality of second functional film layers arranged in layers, and the plurality of second functional film layers comprise a first hole blocking layer and a first electron transport layer arranged in layers on a side of the first light-emitting layer away from the substrate.

7. The display panel of claim 3, wherein, The plurality of functional film layers of the second light-emitting unit comprise:

8. The display panel of claim 3, wherein, at least one third functional film layer arranged on a side of the charge generation layer away from the substrate; a second light-emitting layer arranged on a side of the at least one third functional film layer away from the substrate; and at least one fourth functional film layer arranged on a side of the second light-emitting layer away from the substrate. The second light-emitting unit comprises a plurality of third functional film layers arranged in layers, and the plurality of third functional film layers comprise a second hole transport layer and a second optical adjustment layer arranged in layers on a side of the charge generation layer away from the substrate.

9. The display panel of claim 8, wherein, ​ 10. The display panel of claim 9, wherein, The second light-emitting unit comprises a plurality of fourth functional film layers arranged in a stack, and the plurality of fourth functional film layers comprise a second hole-blocking layer and a second electron-transporting layer arranged in a stack on a side of the second light-emitting layer away from the substrate.

11. The display panel of claim 1, wherein, A normal projection of the charge generation layer on the substrate is located within a normal projection of a functional film layer electrically connected to the partition structure on the substrate.

12. The display panel of claim 11, wherein, A first distance is between a center of the light-emitting layer and a side wall of the partition structure; a second dimension is between a center of the charge generation layer and an end of the charge generation layer close to the partition structure; and the second dimension is smaller than the first distance.

13. The display panel of claim 12, wherein, The light-emitting element comprises at least two charge generation layers, and a light-emitting unit is arranged between adjacent two charge generation layers, and the light-emitting unit arranged between the adjacent two charge generation layers is a target light-emitting unit. An outer contour of a normal projection of at least one film layer of the target light-emitting unit on the substrate is located at a periphery of an outer contour of a normal projection of any one of the two charge generation layers adjacent to the target light-emitting unit on the substrate.

14. The display panel of claim 13, wherein, A third dimension is between a center of the at least one film layer of the target light-emitting unit and an end of the at least one film layer close to the partition structure; and the third dimension is not less than a second dimension of any one of the two charge generation layers adjacent to the target light-emitting unit.

15. The display panel of claim 13, wherein, Normal projections of the at least two charge generation layers on the substrate are located within a normal projection of the light-emitting unit on the substrate.

16. The display panel of claim 13, wherein, An outer contour of a normal projection of the plurality of functional film layers and the light-emitting layer of the target light-emitting unit on the substrate is located at a periphery of an outer contour of a normal projection of any one of the two charge generation layers adjacent to the target light-emitting unit on the substrate.

17. The display panel of claim 13, wherein, An outer contour of a normal projection of the plurality of functional film layers and the light-emitting layer of the target light-emitting unit on the substrate is located at a periphery of an outer contour of a normal projection of any one of the two charge generation layers adjacent to the target light-emitting unit on the substrate.

18. The display panel of claim 2 or 3, wherein, The second electrode of the light-emitting element is electrically connected to the partition structure.

19. The display panel of claim 18, wherein, An outer contour of a normal projection of the second electrode on the substrate is located at a periphery of an outer contour of a normal projection of a bottom surface of the partition structure on the substrate.

20. The display panel of claim 19, wherein, A first distance is between a center of the light-emitting layer and a side wall of the partition structure; a fourth dimension is between a center of the second electrode and an end of the second electrode close to the partition structure; and the fourth dimension is not less than the first distance.

21. The display panel of claim 20, wherein, The partition structure comprises an insulator and a blocking portion arranged in a stack on the substrate, and the second electrode of the light-emitting element is electrically connected to the insulator.

22. The display panel of claim 21, wherein, The second electrode of the light-emitting element is in direct contact with the insulator.

23. The display panel of claim 22, wherein, An outer contour of a normal projection of the second electrode on the substrate is located outside an outer contour of a normal projection of a functional film layer electrically connected to the insulator on the substrate.

24. The display panel of claim 23, wherein, A fifth size between a center of the functional film layer electrically connected with the spacer and an end of the functional film layer close to the partition structure is not greater than the fourth size.

25. The display panel of claim 21, wherein, The material of the spacer comprises at least one of metal and metal oxide.

26. The display panel of claim 21, wherein, A normal projection outer contour of the blocking portion on the substrate is located at a periphery of a normal projection outer contour of the spacer on the substrate.

27. The display panel of claim 21, wherein, The partition structure further comprises a conductive portion disposed on the substrate, the conductive portion is connected to an end of the spacer close to the substrate and extends towards a center of the first opening. At least one of the functional film layers of the at least two light emitting units is electrically connected with the conductive portion.

28. The display panel of claim 27, wherein, The second electrode of the light emitting element is electrically connected with the conductive portion.

29. The display panel of any one of claims 1-17, wherein, The substrate comprises a pixel definition layer, a plurality of pixel openings are disposed on the pixel definition layer; the light emitting element is disposed in the pixel opening, and the partition structure is disposed on the pixel definition layer, each pixel opening is in communication with the first opening.

30. The display panel of claim 29, wherein, The plurality of pixel openings and the plurality of first openings are in one-to-one correspondence in communication.

31. A display device comprising: A display panel comprising any one of claims 1-30.

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