Display panel, preparation method thereof and display device

Abstract

The application provides a display panel, a preparation method thereof and a display device, and relates to the technical field of display. The display panel comprises a substrate, an isolation structure, a plurality of light emitting units and a first encapsulation layer. The isolation structure is arranged on one side of the substrate in the thickness direction and encloses a plurality of isolated openings. The plurality of light emitting units are arranged on one side of the substrate in the thickness direction. The orthographic projection of the light emitting units on the substrate is at least partially located in the orthographic projection of the corresponding isolated opening on the substrate. The first encapsulation layer is located on the side of the light emitting units away from the substrate. The first encapsulation layer comprises a plurality of encapsulation parts. The encapsulation part covers the corresponding light emitting unit. The encapsulation part comprises an extension part. The extension part is located on the side of the isolation structure away from the substrate. The orthographic projection of the extension part on the substrate overlaps the orthographic projection of the isolation structure on the substrate. The closed cavity is defined between the extension part and the isolation structure. The display panel provided by the application is beneficial to improving the use performance of the display device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, more particularly, to a display panel, a preparation method thereof and a display device. BACKGROUND

[0002] At present, flat display devices have the advantages of high image quality, power saving, small thickness and wide application range, and are widely used in various consumer electronic products such as mobile phones, televisions, notebook computers and desktop computers.

[0003] In the preparation process of a traditional display panel, a fine metal mask (FMM) is usually used to realize the patterning of light-emitting pixels. The FMM technology is mature and has rich mass production experience. However, the FMM technology also has the problems of limited precision, high development cost and long development cycle. The fine metal mask-free technology eliminates the limitations of traditional OLED process on the size, resolution and other performance of the display screen, and has the advantages of high performance, full-size and agile delivery. The patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A and CN118781966A disclose the related content of the fine metal mask-free technology, which are referred to for reference.

[0004] However, the use performance / process performance of the current display device needs to be improved. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a display panel, a preparation method thereof and a display device to improve the use performance of the display device.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0007] In a first aspect, a display panel is provided, comprising a substrate, an isolation structure, a plurality of light-emitting units and a first encapsulation layer. The isolation structure is arranged on one side of the substrate in the thickness direction, and the isolation structure encloses to form a plurality of isolated openings. The plurality of light-emitting units are arranged on one side of the substrate in the thickness direction, and the plurality of light-emitting units are located on the side where the isolation structure is located. The orthographic projection of the light-emitting unit on the substrate is at least partially located within the orthographic projection of the corresponding isolated opening on the substrate. The first encapsulation layer is located on the side of the light-emitting unit away from the substrate, and the first encapsulation layer comprises a plurality of encapsulation parts. The encapsulation part covers the corresponding light-emitting unit, and the encapsulation part comprises an extension part. The extension part is located on the side of the isolation structure away from the substrate, and the orthographic projection of the extension part on the substrate overlaps with the orthographic projection of the isolation structure on the substrate. The extension part and the isolation structure define a closed cavity therebetween.

[0008] By the technical solutions, the display panel provided in the present application covers the corresponding light emitting unit by the packaging part of the first packaging layer, and the extension part of the packaging part and the isolation structure define a closed cavity, which can help to avoid water and oxygen from entering the cavity, thereby helping to avoid water and oxygen from entering between the packaging part and the isolation structure, and further helping to avoid water and oxygen from entering the light emitting unit, helping to improve the packaging effect, and further helping to improve the display effect.

[0009] Therefore, the display panel provided in the present application helps to improve the display effect, thereby helping to improve the use performance of the display device.

[0010] In some embodiments, the plurality of packaging parts includes a first packaging part, a second packaging part and a third packaging part, and the plurality of light emitting units includes first light emitting units, second light emitting units and third light emitting units with different light emitting colors, the first packaging part covers the first light emitting units, the second packaging part covers the second light emitting units, and the third packaging part covers the third light emitting units.

[0011] The first packaging layer satisfies at least one of the following conditions:

[0012] The extension part of the first packaging part and the isolation structure define a closed first cavity;

[0013] The extension part of the second packaging part and the isolation structure define a closed second cavity;

[0014] The extension part of the third packaging part and the isolation structure define a closed third cavity.

[0015] In this way, the first packaging part can improve the packaging effect of the first light emitting unit, helping to improve the light emitting effect of the first light emitting unit. In addition, the second packaging part can improve the packaging effect of the second light emitting unit, helping to improve the light emitting effect of the second light emitting unit. In addition, the third packaging part can improve the packaging effect of the third light emitting unit, helping to improve the light emitting effect of the third light emitting unit.

[0016] In some embodiments, the orthographic projection of the extension part of the first packaging part on the substrate overlaps with the orthographic projection of the extension part of the second packaging part on the substrate; and / or, the orthographic projection of the extension part of the second packaging part on the substrate overlaps with the orthographic projection of the extension part of the third packaging part on the substrate. In this way, the extension part of the first packaging part can interact with the extension part of the second packaging part, helping to avoid the extension part from being broken, and the packaging part can improve the packaging effect by using the extension part, thereby helping to improve the light emitting effect.

[0017] In addition, the extension part of the second packaging part can interact with the extension part of the third packaging part, helping to avoid the extension part from being broken, and the packaging part can improve the packaging effect by using the extension part, thereby helping to improve the light emitting effect.

[0018] In some embodiments, the inner peripheral edge of the extension of the first encapsulation part is a first edge, the outer peripheral edge of the extension of the first encapsulation part is a second edge, the extension of the first encapsulation part and the isolation structure define a closed first cavity, the first edge and the second edge are connected with the isolation structure, and the first cavity is located between the first edge and the second edge.

[0019] In this way, the extension of the first encapsulation part can be directly connected with the isolation structure to form a closed first cavity, which can be conducive to avoiding water and oxygen from entering between the first encapsulation part and the isolation structure, thereby avoiding water and oxygen from entering the first light emitting unit and improving the light emitting effect of the first light emitting unit.

[0020] In some embodiments, the inner peripheral edge of the extension of the second encapsulation part is a third edge, the outer peripheral edge of the extension of the second encapsulation part is a fourth edge, the extension of the second encapsulation part and the isolation structure define a closed second cavity, and the second cavity is located between the third edge and the fourth edge.

[0021] The third edge is connected with the isolation structure, a part of the fourth edge in the circumferential direction is connected with the side of the isolation structure away from the substrate, and another part of the fourth edge in the circumferential direction is connected with the side of the first encapsulation part away from the substrate.

[0022] Alternatively, the third edge and the fourth edge are both connected with the isolation structure.

[0023] In this way, the third edge and the fourth edge of the extension of the second encapsulation part can be directly connected with the isolation structure to form a closed second cavity. In addition, the third edge of the extension of the second encapsulation part can be directly connected with the isolation structure, and a part of the fourth edge of the extension of the second encapsulation part can be indirectly connected with the side of the isolation structure away from the substrate, so that the extension of the second encapsulation part and the side of the isolation structure away from the substrate form a closed second cavity. Therefore, the extension of the second encapsulation part can be conducive to avoiding water and oxygen from entering between the second encapsulation part and the isolation structure, thereby avoiding water and oxygen from entering the second light emitting unit and improving the light emitting effect of the second light emitting unit.

[0024] In some embodiments, the inner peripheral edge of the extension of the third encapsulation part is a fifth edge, the outer peripheral edge of the extension of the third encapsulation part is a sixth edge, the extension of the third encapsulation part and the isolation structure define a closed third cavity, and the third cavity is located between the fifth edge and the sixth edge.

[0025] The third encapsulation part satisfies one of the following conditions:

[0026] The fifth edge is connected with the isolation structure, a part of the sixth edge in the circumferential direction is connected with the side of the isolation structure away from the substrate, and another part of the sixth edge in the circumferential direction is connected with the side of the second encapsulation part away from the substrate.

[0027] The fifth edge is connected with the isolation structure, and a part of the sixth edge in the circumferential direction is connected with the side of the first packaging portion away from the substrate, and another part of the sixth edge in the circumferential direction is connected with the side of the second packaging portion away from the substrate.

[0028] The fifth edge and the sixth edge of the extension portion of the third packaging portion are both connected with the isolation structure.

[0029] In this way, the fifth edge and the sixth edge of the extension portion of the third packaging portion can be directly connected with the isolation structure to form a closed third cavity. In addition, the fifth edge of the extension portion of the third packaging portion can be directly connected with the isolation structure, and the sixth edge of the extension portion of the third packaging portion can be indirectly connected with the side of the isolation structure away from the substrate, so that the extension portion of the third packaging portion and the side of the isolation structure away from the substrate form a closed third cavity. In addition, the fifth edge of the extension portion of the third packaging portion can be indirectly connected with the side of the isolation structure away from the substrate, and the sixth edge of the extension portion of the third packaging portion can be indirectly connected with the side of the isolation structure away from the substrate, so that the extension portion of the third packaging portion and the side of the isolation structure away from the substrate form a closed third cavity. Therefore, the extension portion of the third packaging portion can be conducive to avoiding water and oxygen from entering between the third packaging portion and the isolation structure, thereby avoiding water and oxygen from entering the third light-emitting unit, and being conducive to improving the light-emitting effect of the third light-emitting unit.

[0030] In some embodiments, the packaging portion includes a first packaging sub-portion and a second packaging sub-portion, the second packaging sub-portion is located on the side of the first packaging sub-portion away from the substrate and covers the first packaging sub-portion, and a cavity is defined between the first packaging sub-portion, the second packaging sub-portion, and the isolation structure.

[0031] In this way, the packaging portion can be provided with the second packaging sub-portion covering the first packaging sub-portion on the side of the first packaging sub-portion away from the substrate, so that a cavity can be defined between the first packaging sub-portion, the second packaging sub-portion, and the isolation structure, which is conducive to improving the packaging reliability of the packaging portion and avoiding water and oxygen from entering the light-emitting unit.

[0032] In some embodiments, the preparation sequence of the first packaging sub-portion is earlier than that of the second packaging sub-portion. In this way, the display panel provided by the present application can be prepared after the first packaging sub-portion is prepared, which is conducive to improving the packaging effect.

[0033] Optionally, the material of the first packaging sub-portion is different from that of the second packaging sub-portion. In this way, the first packaging sub-portion and the second packaging sub-portion can have different etching selection ratios, which is conducive to reducing the influence of the etching process on the packaging portion and improving the packaging reliability.

[0034] Optionally, the material of the first packaging sub-portion includes an inorganic material, and the material of the second packaging sub-portion includes an inorganic material.

[0035] Optionally, the material of the first encapsulation sub-portion comprises one of silicon nitride, silicon oxide and silicon oxynitride, and the material of the second encapsulation sub-portion comprises another one of silicon nitride, silicon oxide and silicon oxynitride.

[0036] In some embodiments, the first encapsulation portion comprises a first encapsulation sub-portion and a second encapsulation sub-portion, the second encapsulation sub-portion is located on a side of the first encapsulation sub-portion away from the substrate and covers the first encapsulation sub-portion, and a first cavity is defined among the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure; wherein the inner peripheral edge of the extension of the first encapsulation portion is the inner peripheral edge of the extension of the first encapsulation sub-portion, and the outer peripheral edge of the extension of the first encapsulation portion is the outer peripheral edge of the extension of the second encapsulation sub-portion.

[0037] In this way, the first encapsulation portion can be provided with the second encapsulation sub-portion covering the first encapsulation sub-portion on the side of the first encapsulation sub-portion away from the substrate, so that the first cavity can be defined among the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure, which is conducive to improving the encapsulation reliability of the first encapsulation portion and avoiding water and oxygen from entering the first light emitting unit.

[0038] In some embodiments, the second encapsulation portion comprises a first encapsulation sub-portion and a second encapsulation sub-portion, the second encapsulation sub-portion is located on a side of the first encapsulation sub-portion away from the substrate and covers the first encapsulation sub-portion, and a first cavity is defined among the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure; wherein the inner peripheral edge of the extension of the first encapsulation portion is the inner peripheral edge of the extension of the first encapsulation sub-portion, and the outer peripheral edge of the extension of the first encapsulation portion is the outer peripheral edge of the extension of the second encapsulation sub-portion.

[0039] In this way, the second encapsulation portion can be provided with the second encapsulation sub-portion covering the first encapsulation sub-portion on the side of the first encapsulation sub-portion away from the substrate, so that the first cavity can be defined among the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure, which is conducive to improving the encapsulation reliability of the second encapsulation portion and avoiding water and oxygen from entering the second light emitting unit.

[0040] In some embodiments, the third encapsulation portion comprises a first encapsulation sub-portion and a second encapsulation sub-portion, the second encapsulation sub-portion is located on a side of the first encapsulation sub-portion away from the substrate and covers the first encapsulation sub-portion, and a first cavity is defined among the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure; wherein the inner peripheral edge of the extension of the first encapsulation portion is the inner peripheral edge of the extension of the first encapsulation sub-portion, and the outer peripheral edge of the extension of the first encapsulation portion is the outer peripheral edge of the extension of the second encapsulation sub-portion.

[0041] In this way, the third packaging part can be provided with the second third packaging subpart covering the first third packaging subpart on the side of the first third packaging subpart away from the substrate, so that the first third packaging subpart, the second third packaging subpart, and the isolation structure can define the third cavity, which is beneficial to improve the packaging reliability of the third packaging part and is beneficial to avoid water and oxygen from entering the third light emitting unit.

[0042] In some embodiments, the display panel provided in the present application further includes a pixel definition layer, the pixel definition layer is located on one side of the substrate, the isolation structure is located on the side of the pixel definition layer away from the substrate, the pixel definition layer has a plurality of pixel openings, the pixel opening is in communication with the corresponding isolation opening, and at least part of the light emitting unit is arranged in the pixel opening.

[0043] Optionally, the isolation structure includes a support part and a roof part, the roof part is located on the side of the support part away from the substrate, and the orthographic projection of the support part on the substrate is located in the orthographic projection of the roof part on the substrate.

[0044] Optionally, the isolation structure further includes a base part, the support part is located on the side of the base part away from the substrate, the orthographic projection of the support part on the substrate is located in the orthographic projection of the base part on the substrate, and the orthographic projection of the base part on the substrate is located in the orthographic projection of the roof part on the substrate.

[0045] In a second aspect, the present application provides a preparation method of a display panel, the preparation method includes:

[0046] providing a substrate;

[0047] preparing a pixel definition layer and an isolation structure on one side of the substrate, the isolation structure is located on the side of the pixel definition layer away from the substrate, the pixel definition layer has a plurality of pixel openings, the isolation structure encloses to form a plurality of isolation openings, and the pixel opening is in communication with the corresponding isolation opening;

[0048] preparing a light emitting unit, at least part of the light emitting unit is arranged in the pixel opening;

[0049] preparing a first packaging layer, the first packaging layer covers the light emitting unit;

[0050] The first packaging layer includes a plurality of packaging parts, the packaging part covers the corresponding light emitting unit, the packaging part includes an extension part, the extension part is located on the side of the isolation structure away from the substrate, the orthographic projection of the extension part on the substrate overlaps with the orthographic projection of the isolation structure on the substrate, and the extension part and the isolation structure define a closed cavity.

[0051] By the technical solution, the preparation method provided in the application covers the corresponding light emitting unit by the packaging part of the first packaging layer, and the extension part of the packaging part and the isolation structure define a closed cavity, which can prevent water and oxygen from entering the cavity, thereby preventing water and oxygen from entering between the packaging part and the isolation structure, and further preventing water and oxygen from entering the light emitting unit, improving the packaging effect, and further improving the display effect.

[0052] Therefore, the display panel prepared by the preparation method provided in the application can improve the display effect, thereby improving the use performance of the display device.

[0053] In some embodiments, the preparation of the light emitting unit comprises:

[0054] The first light emitting unit is prepared.

[0055] The preparation of the first packaging layer comprises:

[0056] The first packaging part is prepared, the first packaging part covers the first light emitting unit, and the extension part of the first packaging part and the isolation structure define a closed first cavity.

[0057] The preparation of the first packaging part comprises:

[0058] The first packaging subpart is prepared.

[0059] The second packaging subpart is prepared, the second packaging subpart is located on the side of the first packaging subpart away from the substrate and covers the first packaging subpart, and the first packaging subpart, the second packaging subpart, and the isolation structure define the first cavity.

[0060] In this way, the first packaging part of the display panel prepared by the preparation method provided in the application can define the first cavity with the isolation structure, which can improve the packaging reliability of the first packaging part, thereby preventing water and oxygen from entering the first light emitting unit.

[0061] In addition, the preparation method provided in the application can prepare the second packaging subpart covering the first packaging subpart after the preparation of the first packaging subpart, so that the first packaging subpart, the second packaging subpart, and the isolation structure define the first cavity, which can improve the packaging reliability of the first packaging part, thereby preventing water and oxygen from entering the first light emitting unit.

[0062] In some embodiments, after the preparation of the first packaging part,

[0063] The preparation of the light emitting unit comprises:

[0064] The second light emitting unit is prepared.

[0065] The preparation of the first packaging layer comprises:

[0066] A second encapsulation part is prepared, the second encapsulation part covers the second light emitting unit, and an extension of the second encapsulation part and the isolation structure define a closed second cavity.

[0067] In this way, the second encapsulation part of the display panel prepared by the preparation method provided in the present application can define a second cavity with the isolation structure, which is beneficial to improve the encapsulation reliability of the second encapsulation part, thereby being beneficial to avoid water and oxygen from entering the second light emitting unit.

[0068] Optionally, the preparation of the second encapsulation part comprises:

[0069] A first two encapsulation sub-parts are prepared.

[0070] A second two encapsulation sub-part is prepared, the second two encapsulation sub-part is located on a side of the first two encapsulation sub-part away from the substrate and covers the first two encapsulation sub-part, and the first two encapsulation sub-part, the second two encapsulation sub-part, and the isolation structure define a second cavity.

[0071] In this way, the preparation method provided in the present application can prepare the second two encapsulation sub-part covering the first two encapsulation sub-part after the preparation of the first two encapsulation sub-part, so that the first two encapsulation sub-part, the second two encapsulation sub-part, and the isolation structure define a second cavity, which is beneficial to improve the encapsulation reliability of the second encapsulation part, thereby being beneficial to avoid water and oxygen from entering the second light emitting unit.

[0072] In some embodiments, after the preparation of the second encapsulation part,

[0073] The preparation of the light emitting unit comprises:

[0074] A third light emitting unit is prepared.

[0075] The preparation of the first encapsulation layer comprises:

[0076] A third encapsulation part is prepared, the third encapsulation part covers the third light emitting unit, and an extension of the third encapsulation part and the isolation structure define a closed third cavity.

[0077] In this way, the third encapsulation part of the display panel prepared by the preparation method provided in the present application can define a third cavity with the isolation structure, which is beneficial to improve the encapsulation reliability of the third encapsulation part, thereby being beneficial to avoid water and oxygen from entering the third light emitting unit.

[0078] Optionally, the preparation of the third encapsulation part comprises:

[0079] A first three encapsulation sub-part is prepared.

[0080] A second three encapsulation sub-part is prepared, the second three encapsulation sub-part is located on a side of the first three encapsulation sub-part away from the substrate and covers the first three encapsulation sub-part, and the first three encapsulation sub-part, the second three encapsulation sub-part, and the isolation structure define a third cavity.

[0081] In this way, the preparation method provided by the present application can prepare the second three-packaged sub-part covering the first three-packaged sub-part after the preparation of the first three-packaged sub-part, so as to define a third cavity between the first three-packaged sub-part, the second three-packaged sub-part and the isolation structure, which is conducive to improving the packaging reliability of the third packaging part, thereby avoiding water and oxygen from entering the third light-emitting unit.

[0082] In a third aspect, the present application provides a display device, which comprises the display panel of any of the above-mentioned embodiments or the display panel prepared by the preparation method of any of the above-mentioned embodiments. The display device provided by the present application has the same or similar technical effects as the display panel of any of the above-mentioned embodiments or the display panel prepared by the preparation method of any of the above-mentioned embodiments, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0083] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0084] Figure 1 The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0085] Figure 2 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 1 The local enlarged view of A in the above figure is shown in the following figure.

[0086] Figure 3 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 2 The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0087] Figure 4 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0088] Figure 5 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0089] The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 6 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 2 The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0090] Figure 7 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 2 The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0091] Figure 8 The structural schematic diagram of the display panel provided by the present application is shown in the following figure. Figure 2 The structural schematic diagram of the display panel provided by the present application is shown in the following figure.

[0092] Figure 9One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0093] Figure 10 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0094] Figure 11 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0095] Figure 12 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0096] Figure 13 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0097] Figure 14 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0098] Figure 15 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0099] Figure 16 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0100] Figure 17 One of the structural schematic diagrams in a display panel preparation process provided by the present application;

[0101] Figure 18 One of the structural schematic diagrams in a display panel preparation process provided by the present application.

[0102] In the drawings, various reference numerals represent various objects, and wherein:

[0103] 100 - display panel; 10 - substrate; 20 - first electrode; 30 - pixel definition layer; 40 - isolation structure; 401 - first isolation opening; 402 - second isolation opening; 403 - third isolation opening; 50 - light emitting layer; 51 - first light emitting layer; 52 - second light emitting layer; 53 - third light emitting layer; 60 - second electrode; 70 - first encapsulation layer; 7001 - gap; 701 - extension; 71 - first encapsulation part; 7101 - first edge; 7102 - second edge; 711 - first sub-encapsulation part; 712 - second sub-encapsulation part; 72 - second encapsulation part; 7201 - third edge; 7202 - fourth edge; 721 - first sub-encapsulation part; 722 - second sub-encapsulation part; 73 - third encapsulation part; 7301 - fifth edge; 7302 - sixth edge; 731 - first sub-encapsulation part; 732 - second sub-encapsulation part. DETAILED DESCRIPTION

[0104] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0105] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0106] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0107] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0108] Please refer to Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a display panel 100, which can be an organic light-emitting diode (OLED) display panel 100 or a micro light-emitting diode (Micro LED / μLED) display panel 100.

[0109] The display panel 100 includes a substrate 10, which includes a display area AA and a non-display area NA surrounding at least part of the display area AA.

[0110] Please continue to refer to Figure 3The display panel 100 provided by the embodiment of the present application further includes a plurality of light emitting units, the light emitting units are located on one side of the substrate 10 along the thickness direction, and the plurality of light emitting units can be prepared in batches according to a process flow. For example, the plurality of light emitting units can include first light emitting units, second light emitting units and third light emitting units, and the first light emitting units, the second light emitting units and the third light emitting units can emit light of different colors. For example, the first light emitting units can emit red light, the second light emitting units can emit green light, and the third light emitting units can emit blue light.

[0111] It can be understood that the first light emitting units, the second light emitting units and the third light emitting units are sequentially subjected to evaporation and patterning. That is, the display panel 100 provided by the embodiment of the present application can be subjected to evaporation and patterning to form the first light emitting units first, then subjected to evaporation and patterning to form the second light emitting units, and finally subjected to evaporation and patterning to form the third light emitting units.

[0112] In some embodiments, the first light emitting units, the second light emitting units and the third light emitting units can be subjected to patterning by a mask plate.

[0113] In some embodiments, the display panel 100 further includes a pixel definition layer 30 (PDL) and an isolation structure 40, the isolation structure 40 and the pixel definition layer 30 are arranged on the same side of the substrate 10 along the thickness direction, and the isolation structure 40 is arranged on the side of the pixel definition layer 30 away from the substrate 10, and the isolation structure 40 encloses a plurality of isolation openings. The orthographic projection of the light emitting unit on the substrate 10 can be located in the orthographic projection of the corresponding isolation opening on the substrate 10. Optionally, the pixel definition layer 30 and the isolation structure 40 can be located in the display area AA. It can be understood that the first light emitting units, the second light emitting units and the third light emitting units can be subjected to patterning by the isolation structure 40 instead of the mask plate. The pixel definition layer 30 has a pixel opening, and the pixel opening is located in the isolation opening.

[0114] The plurality of isolation openings can include first isolation openings 401, second isolation openings 402 and third isolation openings 403, the first light emitting units correspond to the first isolation openings 401, the second light emitting units correspond to the second isolation openings 402, and the third light emitting units correspond to the third isolation openings 403.

[0115] The display panel 100 further includes a first electrode 20 layer, part of the first electrode 20 layer is located between the pixel definition layer 30 and the substrate 10, the first electrode 20 layer includes a plurality of first electrodes 20 arranged at intervals, the pixel opening is in communication with the isolation opening, the pixel opening exposes part of the first electrode 20, and the light emitting layer 50 can be connected with the first electrode 20 through the pixel opening.

[0116] It can be understood that the first electrode 20 of the light emitting unit is located on the side of the pixel definition layer 30 facing the substrate 10, the light emitting unit includes a light emitting layer 50 and a second electrode 60 located on the side of the light emitting layer 50 away from the substrate 10, the light emitting layer 50 and the second electrode 60 of the light emitting unit are located in the isolation opening, and the light emitting layer 50 is located between the first electrode 20 and the second electrode 60.

[0117] Optionally, the first electrode 20 can be an anode, and the second electrode 60 can be a cathode.

[0118] It can be understood that the light emitting layer 50 of the first light emitting unit is a first light emitting layer 51, the light emitting layer 50 of the second light emitting unit is a second light emitting layer 52, and the light emitting layer 50 of the third light emitting unit is a third light emitting layer 53.

[0119] The display panel 100 provided by the embodiment of the present application further includes a first encapsulation layer 70, the first encapsulation layer 70 is arranged on the side of the pixel definition layer 30 away from the substrate 10 and is located on the side of the light emitting unit away from the substrate 10, and the first encapsulation layer 70 is adjacent to the light emitting unit. The first encapsulation layer 70 includes a plurality of encapsulation portions, and the encapsulation portion covers the corresponding isolation opening and the light emitting unit. In other words, the orthographic projection of the isolation opening on the substrate 10 is located in the orthographic projection of the corresponding encapsulation portion on the substrate 10, and the orthographic projection of the light emitting unit on the substrate 10 is located in the orthographic projection of the corresponding encapsulation portion on the substrate 10.

[0120] The plurality of encapsulation portions can include a first encapsulation portion 71, a second encapsulation portion 72 and a third encapsulation portion 73, the first encapsulation portion 71 corresponds to the first light emitting unit, and the first encapsulation portion 71 is also formed by patterning, the second encapsulation portion 72 corresponds to the second light emitting unit, and the second encapsulation portion 72 is also formed by patterning, and the third encapsulation portion 73 corresponds to the third light emitting unit, and the third encapsulation portion 73 is also formed by patterning. Optionally, the preparation sequence of the first encapsulation portion 71, the second encapsulation portion 72 and the third encapsulation portion 73 is consistent with the preparation sequence of the first light emitting unit, the second light emitting unit and the third light emitting unit.

[0121] Please refer to Figure 3 , Figure 4 and Figure 5 It can be understood that the isolation openings and the pixel openings corresponding to the light emitting units of different light emitting colors can be prepared in different processes (for example, the first isolation opening 401 corresponding to the first light emitting unit and the second isolation opening 402 corresponding to the second light emitting unit are prepared in different processes), and the first encapsulation layer 70 is usually used to encapsulate the light emitting unit after the light emitting unit is formed. After encapsulating the first light emitting unit prepared first (for example, the first light emitting unit), the first encapsulation layer 70 prepares the isolation openings corresponding to the subsequent light emitting units (for example, the second isolation opening 402 and / or the third isolation opening 403).

[0122] In preparation of the isolation opening corresponding to the subsequent light emitting unit, the first encapsulation layer 70 (for example, the first encapsulation part 71) prepared is covered by the glue layer (for example, photoresist) to pattern the isolation structure 40 for preparation of the isolation opening corresponding to the subsequent light emitting unit.

[0123] It should be noted that in addition to covering the first encapsulation layer 70 prepared, the glue layer also needs to cover the position of the isolation structure 40 without needing to open the isolation opening.

[0124] For example, after preparation of the first encapsulation part 71, before preparation of the second isolation opening 402, the first glue layer covers the encapsulation part and the position of the isolation structure 40 without needing to open the isolation opening.

[0125] For example, after preparation of the first encapsulation part 71, before preparation of the second isolation opening 402 and the third isolation opening 403, the first glue layer covers the first encapsulation part 71 and the position of the isolation structure 40 without needing to open the isolation opening. The second isolation opening 402 and the third isolation opening 403 can be prepared simultaneously.

[0126] For example, after preparation of the first encapsulation part 71 and the second encapsulation part 72, before preparation of the third isolation opening 403, the second glue layer covers the first encapsulation part 71 and the position of the isolation structure 40 without needing to open the isolation opening. The first isolation opening 401 and the second isolation opening 402 can be prepared simultaneously. Alternatively, the second isolation opening 402 can also be prepared after the first isolation opening 401.

[0127] The inventor found that, please continue to refer to Figure 3 , the encapsulation part includes an extension part 701, the extension part 701 is located on the side of the isolation structure 40 away from the substrate 10, and the orthographic projection of the extension part 701 on the substrate 10 overlaps the orthographic projection of the isolation structure 40 on the substrate 10. The extension part 701 and the light emitting layer 50 on the side of the isolation structure 40 away from the substrate 10 are etched to form a gap 7001 with an opening, and in the subsequent process, water and oxygen are easy to enter the encapsulation part and the isolation structure 40 through the gap 7001, and then enter the light emitting unit, causing the light emitting unit to be damaged and affecting the light emitting effect.

[0128] To solve the above technical problems, please refer to Figure 6 , Figure 7 and Figure 8 , the display panel 100 provided by the embodiment of the present application utilizes the extension part 701 and the isolation structure 40 to define a closed cavity.

[0129] In this way, the display panel 100 provided by the embodiment of the present application covers the corresponding light emitting unit by the packaging part of the first packaging layer 70, and the extension part 701 of the packaging part and the isolation structure 40 define a closed cavity, which can help to avoid water and oxygen entering the cavity, thereby helping to avoid water and oxygen entering between the packaging part and the isolation structure 40, and further helping to avoid water and oxygen entering the light emitting unit, helping to improve the packaging effect, and further helping to improve the display effect.

[0130] Therefore, the display panel 100 provided by the embodiment of the present application helps to improve the display effect, thereby helping to improve the use performance of the display device.

[0131] In some embodiments, the plurality of packaging parts includes a first packaging part 71, a second packaging part 72, and a third packaging part 73, and the plurality of light emitting units includes first light emitting units, second light emitting units, and third light emitting units with different light emitting colors, the first packaging part 71 covers the first light emitting units, the second packaging part 72 covers the second light emitting units, and the third packaging part 73 covers the third light emitting units; wherein the extension part 701 of the first packaging part 71 and the isolation structure 40 define a closed first cavity.

[0132] In this way, the first packaging part 71 can improve the packaging effect of the first light emitting unit, help to avoid water and oxygen entering the first cavity, and further help to avoid water and oxygen entering the first light emitting unit, thereby helping to improve the light emitting effect of the first light emitting unit.

[0133] Optionally, the extension part 701 of the second packaging part 72 and the isolation structure 40 define a closed second cavity. In this way, the second packaging part 72 can improve the packaging effect of the second light emitting unit, help to avoid water and oxygen entering the second cavity, and further help to avoid water and oxygen entering the third light emitting unit, thereby helping to improve the light emitting effect of the second light emitting unit.

[0134] Optionally, the extension part 701 of the third packaging part 73 and the isolation structure 40 define a closed third cavity. In this way, the third packaging part 73 can improve the packaging effect of the third light emitting unit, help to avoid water and oxygen entering the third cavity, and further help to avoid water and oxygen entering the third light emitting unit, thereby helping to improve the light emitting effect of the third light emitting unit.

[0135] Please continue to refer to Figure 7 and Figure 8Optionally, the orthographic projection of the extension 701 of the first encapsulation portion 71 on the substrate 10 overlaps with the orthographic projection of the extension 701 of the second encapsulation portion 72 on the substrate 10. In this way, the extension 701 of the first encapsulation portion 71 can interact with the extension 701 of the second encapsulation portion 72, which helps to prevent the extension 701 from breaking. The encapsulation portion can use the extension 701 to improve the encapsulation effect, thereby improving the light emission effect.

[0136] Please continue reading. Figure 7 and Figure 8 Optionally, the orthographic projection of the extension 701 of the second encapsulation portion 72 on the substrate 10 overlaps with the orthographic projection of the extension 701 of the third encapsulation portion 73 on the substrate 10. In this way, the extension 701 of the second encapsulation portion 72 can interact with the extension 701 of the third encapsulation portion 73, which helps to prevent the extension 701 from breaking. The encapsulation portion can use the extension 701 to improve the encapsulation effect, thereby improving the light emission effect.

[0137] In some embodiments, please continue reading Figure 6 The inner peripheral edge of the extension 701 of the first encapsulation part 71 is the first edge 7101, and the outer peripheral edge of the extension 701 of the first encapsulation part 71 is the second edge 7102. The first edge 7101 and the second edge 7102 are both connected to the isolation structure 40, and the first cavity is located between the first edge 7101 and the second edge 7102.

[0138] In this way, the extension 701 of the first encapsulation part 71 can be directly connected to the isolation structure 40 to form a closed first cavity, which can help prevent water and oxygen from entering between the first encapsulation part 71 and the isolation structure 40, thereby helping to prevent water and oxygen from entering the first light-emitting unit and improving the light-emitting effect of the first light-emitting unit.

[0139] Optionally, the inner peripheral edge of the extension 701 of the second encapsulation portion 72 is the third edge 7201, the outer peripheral edge of the extension 701 of the second encapsulation portion 72 is the fourth edge 7202, and the second cavity is located between the third edge 7201 and the fourth edge 7202.

[0140] For example, please continue reading Figure 6 The third edge 7201 and the fourth edge 7202 are both connected to the isolation structure 40. In this way, the third edge 7201 and the fourth edge 7202 of the extension 701 of the second encapsulation portion 72 can be directly connected to the isolation structure 40 to form a closed second cavity.

[0141] For example, please continue reading Figure 7 and Figure 8The third edge 7201 is connected with the isolation structure 40, and a part of the fourth edge 7202 in the circumferential direction is connected with the side of the isolation structure 40 away from the substrate 10, and another part of the fourth edge 7202 in the circumferential direction is connected with the side of the first packaging portion 71 away from the substrate 10.

[0142] In this way, the third edge 7201 of the extension portion 701 of the second packaging portion 72 can be directly connected with the isolation structure 40, and the part of the fourth edge 7202 of the extension portion 701 of the second packaging portion 72 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension portion 701 of the second packaging portion 72 and the side of the isolation structure 40 away from the substrate 10 form a closed second cavity. Therefore, the extension portion 701 of the second packaging portion 72 can be beneficial to avoid water and oxygen entering between the second packaging portion 72 and the isolation structure 40, thereby avoiding water and oxygen entering the second light-emitting unit, and being beneficial to improving the light-emitting effect of the second light-emitting unit.

[0143] Optionally, the inner peripheral edge of the extension portion 701 of the third packaging portion 73 is a fifth edge 7301, and the outer peripheral edge of the extension portion 701 of the third packaging portion 73 is a sixth edge 7302, and the third cavity is located between the fifth edge 7301 and the sixth edge 7302.

[0144] For example, please continue to refer to Figure 6 The fifth edge 7301 and the sixth edge 7302 are both connected with the isolation structure 40. In this way, the fifth edge 7301 and the sixth edge 7302 of the extension portion 701 of the third packaging portion 73 can be directly connected with the isolation structure 40 to form a closed third cavity.

[0145] For example, please continue to refer to Figure 7 The fifth edge 7301 is connected with the isolation structure 40, and a part of the sixth edge 7302 in the circumferential direction is connected with the side of the isolation structure 40 away from the substrate 10, and another part of the sixth edge 7302 in the circumferential direction is connected with the side of the second packaging portion 72 away from the substrate 10. In this way, the fifth edge 7301 of the extension portion 701 of the third packaging portion 73 can be directly connected with the isolation structure 40, and the sixth edge 7302 of the extension portion 701 of the third packaging portion 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension portion 701 of the third packaging portion 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0146] For example, please continue to refer to Figure 8The fifth edge 7301 is connected with the isolation structure 40, and a part of the sixth edge 7302 in the circumferential direction is connected with the side of the first packaging portion 71 away from the substrate 10, and another part of the sixth edge 7302 in the circumferential direction is connected with the side of the second packaging portion 72 away from the substrate 10. In this way, the fifth edge 7301 of the extension portion 701 of the third packaging portion 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, and the sixth edge 7302 of the extension portion 701 of the third packaging portion 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension portion 701 of the third packaging portion 73 and the isolation structure 40 form a closed third cavity away from the substrate 10.

[0147] Therefore, the extension portion 701 of the third packaging portion 73 can be beneficial to avoid water and oxygen entering between the third packaging portion 73 and the isolation structure 40, thereby avoiding water and oxygen entering the third light-emitting unit, and being beneficial to improving the light-emitting effect of the third light-emitting unit.

[0148] In other embodiments, the inner peripheral edge of the extension portion 701 of the second packaging portion 72 is a third edge 7201, and the outer peripheral edge of the extension portion 701 of the second packaging portion 72 is a fourth edge 7202, and the second cavity is located between the third edge 7201 and the fourth edge 7202.

[0149] For example, please continue to refer to Figure 6 The third edge 7201 and the fourth edge 7202 are both connected with the isolation structure 40. In this way, the third edge 7201 and the fourth edge 7202 of the extension portion 701 of the second packaging portion 72 can be directly connected with the isolation structure 40 to form a closed second cavity.

[0150] For example, please continue to refer to Figure 7 and Figure 8 The third edge 7201 is connected with the isolation structure 40, and a part of the fourth edge 7202 in the circumferential direction is connected with the side of the isolation structure 40 away from the substrate 10, and another part of the fourth edge 7202 in the circumferential direction is connected with the side of the first packaging portion 71 away from the substrate 10.

[0151] In this way, the third edge 7201 of the extension portion 701 of the second packaging portion 72 can be directly connected with the isolation structure 40, and a part of the fourth edge 7202 of the extension portion 701 of the second packaging portion 72 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension portion 701 of the second packaging portion 72 and the isolation structure 40 form a closed second cavity away from the substrate 10. Therefore, the extension portion 701 of the second packaging portion 72 can be beneficial to avoid water and oxygen entering between the second packaging portion 72 and the isolation structure 40, thereby avoiding water and oxygen entering the second light-emitting unit, and being beneficial to improving the light-emitting effect of the second light-emitting unit.

[0152] Optionally, the inner peripheral edge of the extension part 701 of the third encapsulation part 73 is a fifth edge 7301, the outer peripheral edge of the extension part 701 of the third encapsulation part 73 is a sixth edge 7302, and the third cavity is located between the fifth edge 7301 and the sixth edge 7302.

[0153] Exemplarily, please continue to refer to Figure 6 The fifth edge 7301 and the sixth edge 7302 are both connected with the isolation structure 40. In this way, the fifth edge 7301 and the sixth edge 7302 of the extension part 701 of the third encapsulation part 73 can be directly connected with the isolation structure 40 to form a closed third cavity.

[0154] Exemplarily, please continue to refer to Figure 7 The fifth edge 7301 is connected with the isolation structure 40, a part of the sixth edge 7302 in the circumferential direction is connected with the side of the isolation structure 40 away from the substrate 10, and another part of the sixth edge 7302 in the circumferential direction is connected with the side of the second encapsulation part 72 away from the substrate 10. In this way, the fifth edge 7301 of the extension part 701 of the third encapsulation part 73 can be directly connected with the isolation structure 40, and the sixth edge 7302 of the extension part 701 of the third encapsulation part 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension part 701 of the third encapsulation part 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0155] Exemplarily, please continue to refer to Figure 8 The fifth edge 7301 is connected with the isolation structure 40, a part of the sixth edge 7302 in the circumferential direction is connected with the side of the first encapsulation part 71 away from the substrate 10, and another part of the sixth edge 7302 in the circumferential direction is connected with the side of the second encapsulation part 72 away from the substrate 10. In this way, the fifth edge 7301 of the extension part 701 of the third encapsulation part 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, and the sixth edge 7302 of the extension part 701 of the third encapsulation part 73 can be indirectly connected with the side of the isolation structure 40 away from the substrate 10, so that the extension part 701 of the third encapsulation part 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0156] Therefore, the extension part 701 of the third encapsulation part 73 can be beneficial to avoid water and oxygen from entering between the third encapsulation part 73 and the isolation structure 40, thereby avoiding water and oxygen from entering the third light emitting unit, and being beneficial to improving the light emitting effect of the third light emitting unit.

[0157] In some embodiments, the inner peripheral edge of the extension 701 of the third encapsulation portion 73 is a fifth edge 7301, and the outer peripheral edge of the extension 701 of the third encapsulation portion 73 is a sixth edge 7302, and the third cavity is located between the fifth edge 7301 and the sixth edge 7302.

[0158] For example, as shown in FIG. 7, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 is connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 is connected to the second encapsulation portion 72. Figure 6 Thus, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 can be directly connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 can be indirectly connected to the side of the isolation structure 40 away from the substrate 10, so that the extension 701 of the third encapsulation portion 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0159] For example, as shown in FIG. 7, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 is connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 is connected to the second encapsulation portion 72. Figure 7 Thus, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 can be directly connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 can be indirectly connected to the side of the isolation structure 40 away from the substrate 10, so that the extension 701 of the third encapsulation portion 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0160] For example, as shown in FIG. 7, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 is connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 is connected to the second encapsulation portion 72. Figure 8 Thus, the fifth edge 7301 of the extension 701 of the third encapsulation portion 73 can be directly connected to the isolation structure 40, and the sixth edge 7302 of the extension 701 of the third encapsulation portion 73 can be indirectly connected to the side of the isolation structure 40 away from the substrate 10, so that the extension 701 of the third encapsulation portion 73 and the side of the isolation structure 40 away from the substrate 10 form a closed third cavity.

[0161] Therefore, the extension 701 of the third encapsulation portion 73 can facilitate avoiding water and oxygen from entering between the third encapsulation portion 73 and the isolation structure 40, thereby avoiding water and oxygen from entering the third light emitting unit, and facilitating improving the light emitting effect of the third light emitting unit.

[0162] It can be understood that at least one of the first encapsulation portion 71, the second encapsulation portion 72, and the third encapsulation portion 73 and the isolation structure 40 form a cavity.

[0163] In some embodiments, the encapsulation portion includes a first encapsulation sub-portion and a second encapsulation sub-portion, the second encapsulation sub-portion is located on a side of the first encapsulation sub-portion away from the substrate 10 and covers the first encapsulation sub-portion, and a cavity is defined among the first encapsulation sub-portion, the second encapsulation sub-portion, and the isolation structure 40.

[0164] In this way, the encapsulation portion can be provided with the second encapsulation sub-portion covering the first encapsulation sub-portion on a side of the first encapsulation sub-portion away from the substrate 10, and a cavity can be defined among the first encapsulation sub-portion, the second encapsulation sub-portion, and the isolation structure 40, which is conducive to improving the encapsulation reliability of the encapsulation portion and avoiding water and oxygen from entering the light-emitting unit.

[0165] Optionally, the preparation sequence of the first encapsulation sub-portion is earlier than that of the second encapsulation sub-portion. In this way, the display panel 100 provided by the embodiments of the present application can prepare the second encapsulation sub-portion after preparing the first encapsulation sub-portion, which is conducive to improving the encapsulation effect.

[0166] Optionally, the material of the first encapsulation sub-portion is different from that of the second encapsulation sub-portion. In this way, the first encapsulation sub-portion and the second encapsulation sub-portion can have different etching selection ratios, which is conducive to reducing the influence of the etching process on the encapsulation portion and improving the encapsulation reliability.

[0167] Optionally, the material of the first encapsulation sub-portion includes an inorganic material, and the material of the second encapsulation sub-portion includes an inorganic material.

[0168] Optionally, the material of the first encapsulation sub-portion includes one of silicon nitride, silicon oxide, and silicon oxynitride, and the material of the second encapsulation sub-portion includes another one of silicon nitride, silicon oxide, and silicon oxynitride.

[0169] In some embodiments, please continue to refer to Figure 6 , Figure 7 and Figure 8 , the first encapsulation portion 71 includes a first encapsulation sub-portion 711 and a second encapsulation sub-portion 712, the second encapsulation sub-portion 712 is located on a side of the first encapsulation sub-portion 711 away from the substrate 10 and covers the first encapsulation sub-portion 711, and a first cavity is defined among the first encapsulation sub-portion 711, the second encapsulation sub-portion 712, and the isolation structure 40.

[0170] In this way, the first encapsulation portion 71 can be provided with the second encapsulation sub-portion 712 covering the first encapsulation sub-portion 711 on a side of the first encapsulation sub-portion 711 away from the substrate 10, and a first cavity can be defined among the first encapsulation sub-portion 711, the second encapsulation sub-portion 712, and the isolation structure 40, which is conducive to improving the encapsulation reliability of the first encapsulation portion 71 and avoiding water and oxygen from entering the first light-emitting unit.

[0171] Optionally, the inner peripheral edge of the extension 701 of the first encapsulation part 71 is the inner peripheral edge of the extension 701 of the first sub-encapsulation part 711.

[0172] Optionally, the outer peripheral edge of the extension 701 of the first encapsulation part 71 is the outer peripheral edge of the extension 701 of the second sub-encapsulation part 712.

[0173] In some embodiments, the second encapsulation part 72 includes a first sub-encapsulation part 721 and a second sub-encapsulation part 722, the second sub-encapsulation part 722 is located on the side of the first sub-encapsulation part 721 away from the substrate 10 and covers the first sub-encapsulation part 721, and a second cavity is defined between the first sub-encapsulation part 721, the second sub-encapsulation part 722 and the isolation structure 40.

[0174] In this way, the second encapsulation part 72 can be provided with the second sub-encapsulation part 722 covering the first sub-encapsulation part 721 on the side of the first sub-encapsulation part 721 away from the substrate 10, so that a second cavity can be defined between the first sub-encapsulation part 721, the second sub-encapsulation part 722 and the isolation structure 40, which is conducive to improving the encapsulation reliability of the second encapsulation part 72 and avoiding water and oxygen entering the second light emitting unit.

[0175] Optionally, the inner peripheral edge of the extension 701 of the second encapsulation part 72 is the inner peripheral edge of the extension 701 of the first sub-encapsulation part 721.

[0176] Optionally, the outer peripheral edge of the extension 701 of the second encapsulation part 72 is the outer peripheral edge of the extension 701 of the second sub-encapsulation part 722.

[0177] In some embodiments, the third encapsulation part 73 includes a first sub-encapsulation part 731 and a second sub-encapsulation part 732, the second sub-encapsulation part 732 is located on the side of the first sub-encapsulation part 731 away from the substrate 10 and covers the first sub-encapsulation part 731, and a third cavity is defined between the first sub-encapsulation part 731, the second sub-encapsulation part 732 and the isolation structure 40.

[0178] In this way, the third encapsulation part 73 can be provided with the second sub-encapsulation part 732 covering the first sub-encapsulation part 731 on the side of the first sub-encapsulation part 731 away from the substrate 10, so that a third cavity can be defined between the first sub-encapsulation part 731, the second sub-encapsulation part 732 and the isolation structure 40, which is conducive to improving the encapsulation reliability of the third encapsulation part 73 and avoiding water and oxygen entering the third light emitting unit.

[0179] Optionally, the inner peripheral edge of the extension 701 of the third encapsulation part 73 is the inner peripheral edge of the extension 701 of the first sub-encapsulation part 731.

[0180] Optionally, the outer peripheral edge of the extension 701 of the third encapsulation part 73 is the outer peripheral edge of the extension 701 of the second third encapsulation subpart 732.

[0181] In some embodiments, the display panel 100 provided by the embodiments of the present application further includes a pixel definition layer 30, the pixel definition layer 30 is located on one side of the substrate 10, the isolation structure 40 is located on the side of the pixel definition layer 30 away from the substrate 10, the pixel definition layer 30 has a plurality of pixel openings, the pixel openings are in communication with the corresponding isolation openings, and at least part of the light emitting unit is arranged in the pixel opening.

[0182] Optionally, the isolation structure 40 includes a support part and a roof part, the roof part is located on the side of the support part away from the substrate 10, and the orthographic projection of the support part on the substrate 10 is located in the orthographic projection of the roof part on the substrate 10.

[0183] Optionally, the isolation structure 40 further includes a base part, the support part is located on the side of the base part away from the substrate 10, the orthographic projection of the support part on the substrate 10 is located in the orthographic projection of the base part on the substrate 10, and the orthographic projection of the base part on the substrate 10 is located in the orthographic projection of the roof part on the substrate 10.

[0184] Optionally, the material of the base part can be molybdenum (Mo).

[0185] Optionally, the material of the base part can be titanium (Ti).

[0186] Optionally, the material of the support part can be aluminum (Al).

[0187] Optionally, the material of the roof part can be titanium (Ti).

[0188] It can be understood that the isolation structure 40 is used to overlap the second electrode 60 to electrically conduct the second electrode 60.

[0189] In some embodiments, the display panel 100 provided by the embodiments of the present application can further include a second encapsulation layer and a third encapsulation layer, the second encapsulation layer is located on the side of the first encapsulation layer 70 away from the substrate 10, and the third encapsulation layer is located on the side of the second encapsulation layer away from the substrate 10.

[0190] Optionally, the first encapsulation layer 70 can be an inorganic encapsulation layer formed by chemical vapor deposition (CVD) and patterning.

[0191] Optionally, the second encapsulation layer can be an organic encapsulation layer made by ink jet printing (IJP).

[0192] Optionally, the third encapsulation layer can be an inorganic encapsulation layer formed by Chemical Vapor Deposition (CVD).

[0193] Optionally, the display panel 100 provided in the present application can further include other film layers, which are located on the side of the third encapsulation layer away from the substrate 10. The other film layers can include a polarizing film, an Optically Clear Adhesive (OCA), etc.

[0194] In some embodiments, the present application further provides a preparation method of the display panel 100, which includes:

[0195] S100, providing a substrate 10;

[0196] S200, preparing a pixel definition layer 30 and an isolation structure 40 on one side of the substrate 10, the isolation structure 40 being located on the side of the pixel definition layer 30 away from the substrate 10, the pixel definition layer 30 having a plurality of pixel openings, and the isolation structure 40 being surrounded to form a plurality of isolation openings, the pixel opening and the corresponding isolation opening being in communication;

[0197] S300, preparing a light emitting unit, at least part of the light emitting unit being arranged in the pixel opening;

[0198] S400, preparing a first encapsulation layer 70, the first encapsulation layer 70 covering the light emitting unit.

[0199] The first encapsulation layer 70 includes a plurality of encapsulation portions, each of the encapsulation portions covering a corresponding light emitting unit, each of the encapsulation portions including an extension portion 701, the extension portion 701 being located on the side of the isolation structure 40 away from the substrate 10, and the extension portion 701 and the isolation structure 40 defining a closed cavity.

[0200] By the above technical solution, the preparation method provided in the present application utilizes the encapsulation portion of the first encapsulation layer 70 to cover the corresponding light emitting unit, and the extension portion 701 of the encapsulation portion and the isolation structure 40 define a closed cavity, which can be beneficial to avoid water and oxygen from entering the cavity, thereby being beneficial to avoid water and oxygen from entering between the encapsulation portion and the isolation structure 40, and further being beneficial to avoid water and oxygen from entering the light emitting unit, and being beneficial to improve the encapsulation effect, and further being beneficial to improve the display effect.

[0201] Therefore, the display panel 100 prepared by the preparation method provided in the present application is beneficial to improve the display effect, thereby being beneficial to improve the use performance of the display device.

[0202] In some embodiments, in step S300, the preparation of the light emitting unit includes:

[0203] S310, a first light emitting unit is prepared;

[0204] In step S400, the first encapsulation layer 70 is prepared, including:

[0205] S410, a first encapsulation part 71 is prepared, the first encapsulation part 71 covers the first light emitting unit, and an extension part 701 of the first encapsulation part 71 and the isolation structure 40 define a closed first cavity.

[0206] In this way, the preparation method provided by the embodiment of the present application can define the first cavity between the first encapsulation part 71 and the isolation structure 40, which is beneficial to improve the encapsulation reliability of the first encapsulation part 71, thereby being beneficial to avoid water and oxygen from entering the first light emitting unit.

[0207] Optionally, in step S410, the first encapsulation part 71 is prepared, including:

[0208] S411, a first encapsulation subpart 711 is prepared;

[0209] S412, a second encapsulation subpart 712 is prepared, the second encapsulation subpart 712 is located on a side of the first encapsulation subpart 711 away from the substrate 10 and covers the first encapsulation subpart 711, and the first encapsulation subpart 711, the second encapsulation subpart 712 and the isolation structure 40 define the first cavity.

[0210] In this way, the preparation method provided by the embodiment of the present application can prepare the second encapsulation subpart 712 covering the first encapsulation subpart 711 after the first encapsulation subpart 711 is prepared, so as to define the first cavity between the first encapsulation subpart 711, the second encapsulation subpart 712 and the isolation structure 40, which is beneficial to improve the encapsulation reliability of the first encapsulation part 71, thereby being beneficial to avoid water and oxygen from entering the first light emitting unit.

[0211] In some embodiments, after the first encapsulation part 71 is prepared in step S410,

[0212] In step S300, the light emitting unit is prepared, including:

[0213] S320, a second light emitting unit is prepared;

[0214] In step S400, the first encapsulation layer 70 is prepared, including:

[0215] S420, a second encapsulation part 72 is prepared, the second encapsulation part 72 covers the second light emitting unit, and an extension part 701 of the second encapsulation part 72 and the isolation structure 40 define a closed second cavity.

[0216] In this way, the preparation method provided by the embodiment of the present application can prepare the second encapsulation part 72 of the display panel 100, and the second cavity can be defined between the second encapsulation part 72 and the isolation structure 40, which is beneficial to improve the encapsulation reliability of the second encapsulation part 72, thereby being beneficial to avoid water and oxygen from entering the second light emitting unit.

[0217] Optionally, in step S420, the preparation of the second encapsulation part 72 comprises:

[0218] S421, a first sub-encapsulation part 721 is prepared;

[0219] S422, a second sub-encapsulation part 722 is prepared, the second sub-encapsulation part 722 is located on the side of the first sub-encapsulation part 721 away from the substrate 10, and covers the first sub-encapsulation part 721, and the second cavity is defined between the first sub-encapsulation part 721, the second sub-encapsulation part 722 and the isolation structure 40.

[0220] In this way, the preparation method provided by the embodiment of the present application can prepare the second encapsulation part 72 of the display panel 100, and the second cavity can be defined between the second encapsulation part 72 and the isolation structure 40, which is beneficial to improve the encapsulation reliability of the second encapsulation part 72, thereby being beneficial to avoid water and oxygen from entering the second light emitting unit.

[0221] In some embodiments, after the preparation of the second encapsulation part 72 in step S420,

[0222] In step S300, the preparation of the light emitting unit comprises:

[0223] S330, a third light emitting unit is prepared;

[0224] In step S400, the preparation of the first encapsulation layer 70 comprises:

[0225] S430, a third encapsulation part 73 is prepared, the third encapsulation part 73 covers the third light emitting unit, and the closed third cavity is defined between the extension part 701 of the third encapsulation part 73 and the isolation structure 40.

[0226] In this way, the preparation method provided by the embodiment of the present application can prepare the third encapsulation part 73 of the display panel 100, and the third cavity can be defined between the third encapsulation part 73 and the isolation structure 40, which is beneficial to improve the encapsulation reliability of the third encapsulation part 73, thereby being beneficial to avoid water and oxygen from entering the third light emitting unit.

[0227] Optionally, in step S430, the preparation of the third encapsulation part 73 comprises:

[0228] S431, a first sub-encapsulation part 731 is prepared;

[0229] S432, a second three-packaged sub-part 732 is prepared, the second three-packaged sub-part 732 is located on the side of the first three-packaged sub-part 731 away from the substrate 10, and covers the first three-packaged sub-part 731, and a third cavity is defined among the first three-packaged sub-part 731, the second three-packaged sub-part 732 and the isolation structure 40.

[0230] In this way, the preparation method provided in the embodiments of the present application can prepare the second three-packaged sub-part 732 covering the first three-packaged sub-part 731 after the first three-packaged sub-part 731 is prepared, so that the third cavity is defined among the first three-packaged sub-part 731, the second three-packaged sub-part 732 and the isolation structure 40, which is beneficial to improve the packaging reliability of the third packaging part 73, thereby being beneficial to avoid water and oxygen from entering the third light-emitting unit.

[0231] Please refer to Figure 6 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 , the preparation method provided in the embodiments of the present application can prepare the display panel 100 shown in Figure 6 .

[0232] Please refer to Figure 7 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 , the preparation method provided in the embodiments of the present application can prepare the display panel 100 shown in Figure 7 .

[0233] In some embodiments, the embodiments of the present application further provide a display device, which comprises the display panel 100 of any of the above embodiments or the display panel 100 prepared by the preparation method of any of the above embodiments.

[0234] Optionally, the display device can be a mobile phone, a television, a tablet computer, a notebook computer, a desktop computer, a vehicle-mounted display terminal, a wearable device, an advertising display device, or the like.

[0235] The display device provided in the embodiments of the present application has the same or similar technical effects as the display panel 100 of any of the above embodiments or the display panel 100 prepared by the preparation method of any of the above embodiments, and details are not described herein.

[0236] The above are merely specific embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that, include: substrate; An isolation structure is disposed on one side of the substrate along the thickness direction and encloses a plurality of isolation openings; Multiple light-emitting units are disposed on one side of the substrate along the thickness direction and on the side where the isolation structure is located. At least a portion of the light-emitting units have their orthographic projection on the substrate located within the orthographic projection of the corresponding isolation opening on the substrate. A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation portions, each encapsulation portion covering the corresponding light-emitting unit. Each encapsulation portion includes an extension portion, which is located on the side of the isolation structure away from the substrate. The orthographic projection of the extension portion on the substrate overlaps with the orthographic projection of the isolation structure on the substrate. A closed cavity is defined between the extension portion and the isolation structure. The extension portion is connected to the isolation structure. The first encapsulation layer is an inorganic encapsulation layer. The plurality of encapsulation portions include a first encapsulation portion, a second encapsulation portion, and a third encapsulation portion; the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different light-emitting colors; the first encapsulation portion covers the first light-emitting unit; the second encapsulation portion covers the second light-emitting unit; and the third encapsulation portion covers the third light-emitting unit. The inner peripheral edge of the extension of the first encapsulation portion is the first edge, and the outer peripheral edge of the extension of the first encapsulation portion is the second edge. Both the first edge and the second edge are connected to the isolation structure. A closed first cavity is defined between the extension of the first encapsulation portion and the isolation structure. The first cavity is located between the first edge, the second edge and the isolation structure.

2. The display panel as described in claim 1, characterized in that, The orthographic projection of the extension of the first encapsulation portion on the substrate overlaps with the orthographic projection of the extension of the second encapsulation portion on the substrate; And / or, the orthographic projection of the extension of the second encapsulation portion on the substrate overlaps with the orthographic projection of the extension of the third encapsulation portion on the substrate.

3. The display panel as described in claim 1, characterized in that, The inner peripheral edge of the extension of the second encapsulation portion is the third edge, the outer peripheral edge of the extension of the second encapsulation portion is the fourth edge, and a closed second cavity is defined between the extension of the second encapsulation portion and the isolation structure. The second cavity is located between the third edge, the fourth edge and the isolation structure. The third edge is connected to the isolation structure, a portion of the fourth edge in the circumferential direction is connected to the side of the isolation structure opposite to the substrate, and another portion of the fourth edge in the circumferential direction is connected to the side of the first encapsulation portion opposite to the substrate. Alternatively, both the third edge and the fourth edge are connected to the isolation structure.

4. The display panel as described in claim 3, characterized in that, The inner peripheral edge of the extension of the third encapsulation portion is the fifth edge, the outer peripheral edge of the extension of the third encapsulation portion is the sixth edge, and a closed third cavity is defined between the extension of the third encapsulation portion and the isolation structure. The third cavity is located between the fifth edge, the sixth edge and the isolation structure. The third encapsulation part satisfies one of the following conditions: The fifth edge is connected to the isolation structure, a portion of the sixth edge in the circumferential direction is connected to the side of the isolation structure away from the substrate, and another portion of the sixth edge in the circumferential direction is connected to the side of the second encapsulation portion away from the substrate. The fifth edge is connected to the isolation structure, a portion of the sixth edge in the circumferential direction is connected to the side of the first encapsulation portion away from the substrate, and another portion of the sixth edge in the circumferential direction is connected to the side of the second encapsulation portion away from the substrate. Both the fifth edge and the sixth edge are connected to the isolation structure.

5. The display panel as described in any one of claims 1 to 4, characterized in that, The encapsulation portion includes a first encapsulation sub-portion and a second encapsulation sub-portion, the second encapsulation sub-portion being located on the side of the first encapsulation sub-portion facing away from the substrate and covering the first encapsulation sub-portion, and the cavity being defined between the first encapsulation sub-portion, the second encapsulation sub-portion and the isolation structure.

6. The display panel as described in claim 5, characterized in that, The first encapsulation sub-part is prepared earlier than the second encapsulation sub-part.

7. The display panel as described in any one of claims 1 to 4, characterized in that, The first encapsulation portion includes a first encapsulation sub-portion and a second encapsulation sub-portion. The second encapsulation sub-portion is located on the side of the first encapsulation sub-portion away from the substrate and covers the first encapsulation sub-portion. The first encapsulation sub-portion, the second encapsulation sub-portion, and the isolation structure define the first cavity. Wherein, the inner peripheral edge of the extension of the first encapsulation portion is the inner peripheral edge of the extension of the first encapsulation sub-part, and the outer peripheral edge of the extension of the first encapsulation portion is the outer peripheral edge of the extension of the second encapsulation sub-part.

8. The display panel as described in any one of claims 1 to 4, characterized in that, The second packaging portion includes a first second packaging sub-portion and a second second packaging sub-portion. The second second packaging sub-portion is located on the side of the first second packaging sub-portion away from the substrate and covers the first second packaging sub-portion. A second cavity is defined between the first second packaging sub-portion, the second second packaging sub-portion, and the isolation structure. Wherein, the inner peripheral edge of the extension of the second encapsulation portion is the inner peripheral edge of the extension of the first two encapsulation sub-parts, and the outer peripheral edge of the extension of the second encapsulation portion is the outer peripheral edge of the extension of the second two encapsulation sub-parts.

9. The display panel as described in any one of claims 1 to 4, characterized in that, The third packaging portion includes a first third packaging sub-portion and a second third packaging sub-portion. The second third packaging sub-portion is located on the side of the first third packaging sub-portion away from the substrate and covers the first third packaging sub-portion. A third cavity is defined between the first third packaging sub-portion, the second third packaging sub-portion, and the isolation structure. Wherein, the inner peripheral edge of the extension of the third encapsulation part is the inner peripheral edge of the extension of the first third encapsulation sub-part, and the outer peripheral edge of the extension of the third encapsulation part is the outer peripheral edge of the extension of the second third encapsulation sub-part.

10. The display panel as claimed in any one of claims 1 to 4, characterized in that, The display panel further includes a pixel definition layer located on one side of the substrate, and the isolation structure located on the side of the pixel definition layer opposite to the substrate. The pixel definition layer has a plurality of pixel openings, and the pixel openings are connected to the corresponding isolation openings. At least a portion of the light-emitting unit is disposed within the pixel opening.

11. A method for manufacturing a display panel, characterized in that, The preparation method includes: Provide substrate; A pixel definition layer and an isolation structure are prepared on one side of the substrate. The isolation structure is located on the side of the pixel definition layer opposite to the substrate. The pixel definition layer has multiple pixel openings. The isolation structure surrounds and forms multiple isolation openings. The pixel openings are connected to the corresponding isolation openings. A light-emitting unit is prepared, wherein at least a portion of the light-emitting unit is disposed within the pixel opening; A first encapsulation layer is prepared, which covers the light-emitting unit; The first encapsulation layer includes a plurality of encapsulation portions, each encapsulation portion covering a corresponding light-emitting unit. Each encapsulation portion includes an extension portion located on the side of the isolation structure away from the substrate, and the orthographic projection of the extension portion on the substrate overlaps with the orthographic projection of the isolation structure on the substrate. A closed cavity is defined between the extension portion and the isolation structure. The plurality of encapsulation portions include a first encapsulation portion, a second encapsulation portion, and a third encapsulation portion; the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different light-emitting colors; the first encapsulation portion covers the first light-emitting unit; the second encapsulation portion covers the second light-emitting unit; and the third encapsulation portion covers the third light-emitting unit. The inner peripheral edge of the extension of the first encapsulation portion is the first edge, and the outer peripheral edge of the extension of the first encapsulation portion is the second edge. Both the first edge and the second edge are connected to the isolation structure. A closed first cavity is defined between the extension of the first encapsulation portion and the isolation structure. The first cavity is located between the first edge, the second edge and the isolation structure.

12. The preparation method according to claim 11, characterized in that, The preparation of the light-emitting unit includes: Fabrication of the first light-emitting unit; The preparation of the first encapsulation layer includes: A first encapsulation portion is prepared, the first encapsulation portion covers the first light-emitting unit, and a closed first cavity is defined between the extension portion of the first encapsulation portion and the isolation structure. The preparation of the first encapsulation portion includes: Prepare the first packaging sub-unit; A second encapsulation sub-part is prepared, the second encapsulation sub-part being located on the side of the first encapsulation sub-part facing away from the substrate and covering the first encapsulation sub-part, and the first cavity is defined between the first encapsulation sub-part, the second encapsulation sub-part, and the isolation structure.

13. The preparation method according to claim 12, characterized in that, After the first encapsulation part is prepared... The preparation of the light-emitting unit includes: Fabrication of a second light-emitting unit; The preparation of the first encapsulation layer includes: A second encapsulation portion is prepared, which covers the second light-emitting unit, and an extension of the second encapsulation portion defines a closed second cavity between the isolation structure and the second encapsulation portion.

14. The preparation method according to claim 13, characterized in that, The preparation of the second packaging section includes: Fabrication of the first and second packaging sub-units; A second encapsulation sub-part is prepared, which is located on the side of the first encapsulation sub-part away from the substrate and covers the first encapsulation sub-part. The first encapsulation sub-part, the second encapsulation sub-part, and the isolation structure define a second cavity.

15. The preparation method according to claim 13 or 14, characterized in that, After the preparation of the second encapsulation part, The preparation of the light-emitting unit includes: Fabrication of the third light-emitting unit; The preparation of the first encapsulation layer includes: A third encapsulation portion is prepared, the third encapsulation portion covering the third light-emitting unit, and an extended portion of the third encapsulation portion defining a closed third cavity between itself and the isolation structure.

16. The preparation method according to claim 15, characterized in that, The preparation of the third packaging section includes: Fabrication of the first three-part packaging sub-unit; A second third package sub-part is prepared, which is located on the side of the first third package sub-part away from the substrate and covers the first third package sub-part. The third cavity is defined between the first third package sub-part, the second third package sub-part, and the isolation structure.

17. A display device, characterized in that, This includes the display panel as described in any one of claims 1 to 10 or the display panel prepared by the preparation method as described in any one of claims 11 to 16.

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