Display panel, preparation method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a preparation method thereof and a display device, relates to the technical field of display, and is used for reducing the reflectivity of the display panel, reducing the problem of secret lighting between two adjacent sub-pixels and improving the display effect of the display panel. The display panel comprises a first pixel definition layer and a second pixel definition layer, and at least one of the first pixel definition layer and the second pixel definition layer comprises a shading material; the first pixel definition layer comprises a first pixel opening, the second pixel definition layer comprises a second pixel opening, and the second pixel opening and the first pixel opening are at least partially overlapped in the direction perpendicular to the plane where the substrate is located; the partition part at least partially surrounds the first pixel opening and the second pixel opening; the partition part comprises a concave part and / or a first convex part.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) has the advantages of self-luminescence, no need for backlight, wide color gamut, high contrast, thin thickness, wide viewing angle, and fast response speed. As a current-type light-emitting device, OLED display panels have been increasingly used in high-performance displays.

[0003] The performance of OLED display panels still needs to be improved. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a display panel and a manufacturing method thereof, and a display device, which are used to reduce the reflectivity of the display panel, alleviate the problem of brightness leakage, and improve the display effect.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including: substrate; A first pixel definition layer is located on one side of the substrate, and the first pixel definition layer includes a first pixel opening; a second pixel definition layer located on a side of the first pixel definition layer away from the substrate, at least one of the first pixel definition layer and the second pixel definition layer comprising a light-shielding material; the second pixel definition layer comprising a second pixel opening, wherein the second pixel opening at least partially overlaps the first pixel opening along a direction perpendicular to the plane of the substrate; a light-emitting layer, wherein at least a portion of the light-emitting layer is located within the first pixel opening and the second pixel opening; The partition portion at least partially surrounds the first pixel opening and the second pixel opening; the partition portion includes a recessed portion and / or a first raised portion, the recessed portion is recessed from the surface of the second pixel definition layer away from the first pixel definition layer to the side close to the first pixel definition layer; the first raised portion is raised from the surface of the second pixel definition layer away from the first pixel definition layer to the side away from the first pixel definition layer.

[0006] In a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, comprising: providing a substrate; forming a first pixel definition layer on one side of the substrate, wherein the first pixel definition layer includes a first pixel opening; forming a second pixel definition layer on a side of the first pixel definition layer away from the substrate, wherein at least one of the first pixel definition layer and the second pixel definition layer comprises a light-shielding material; the second pixel definition layer comprises a second pixel opening; and along a direction perpendicular to the plane of the substrate, the second pixel opening at least partially overlaps with the first pixel opening; A partition portion is formed that at least partially surrounds the first pixel opening and the second pixel opening, and the partition portion includes a recessed portion and / or a first raised portion. The recessed portion is recessed from the surface of the second pixel definition layer away from the first pixel definition layer toward a side close to the first pixel definition layer; and the first raised portion is raised from the surface of the second pixel definition layer away from the first pixel definition layer toward a side away from the first pixel definition layer.

[0007] In a third aspect, an embodiment of the present invention provides a display device comprising the above-mentioned display panel.

[0008] The display panel, preparation method thereof, and display device provided by the embodiments of the present invention can reduce the reflectivity of the display panel by setting a first pixel definition layer and a second pixel definition layer in the display panel, and making at least one of the two include a shading material. The shading material can absorb external ambient light, as well as ambient light reflected by the metal structure inside the display panel.

[0009] Furthermore, in the embodiment of the present invention, by providing a partition portion in the display panel, the partition portion can extend or block the leakage path, thereby reducing the problem of brightness leakage and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A schematic top view of a display panel provided by an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a display panel provided by an embodiment of the present invention; Figure 3 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 4 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 5 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 6 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 7 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 8 A schematic cross-sectional view of another display panel provided by an embodiment of the present invention; Figure 9 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present invention; Figure 10 A schematic flow chart of another method for manufacturing a display panel provided by an embodiment of the present invention; Figure 11 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 12 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 13 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 14 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 15 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 16 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 17 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention; Figure 18 A schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0012] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0013] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0014] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0015] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0016] An embodiment of the present invention provides a display panel, such as Figure 1 and Figure 2 As shown, Figure 1 A schematic top view of a display panel provided by an embodiment of the present invention is shown. Figure 2 The cross-sectional view of a display panel provided by an embodiment of the present invention is as follows. The display panel 100 includes a substrate 1 and a plurality of sub-pixels 2 formed on one side of the substrate 1. In the embodiment of the present invention, the display panel 100 includes sub-pixels 2 of multiple colors. Figure 1 For example, the sub-pixel 2 includes a first sub-pixel 2_1 , a second sub-pixel 2_2 , and a third sub-pixel 2_3 .

[0017] like Figure 2 As shown, the sub-pixel 2 includes a light-emitting element. Optionally, the light-emitting element includes any one of an organic light-emitting diode (OLED), a micro light-emitting diode (Micro-LED), or a quantum dot light-emitting diode (QLED).

[0018] like Figure 2 As shown, the light emitting element includes a first electrode 201, a light emitting layer 203, a second electrode 202 and a common layer 204. The common layer 204 can enhance the migration and recombination efficiency of carriers.

[0019] Optional, such as Figure 2 As shown, the common layer 204 includes a first sub-common layer 2041 and a second sub-common layer 2042 . The first sub-common layer 2041 is located between the first electrode 201 and the light-emitting layer 203 , and the second sub-common layer 2042 is located between the second electrode 202 and the light-emitting layer 203 .

[0020] In the embodiment of the present invention, the first electrodes 201 of different sub-pixels 2 are independent of each other, and the second electrodes 202 of the plurality of sub-pixels 2 are electrically connected to each other.

[0021] Optionally, the first electrode 201 includes an anode, and the second electrode 202 includes a cathode. The first sub-common layer 2041 includes one or more of a hole injection layer (HIL), a hole transport layer (HTL), and a hole block layer (HBL). The second sub-common layer 2042 includes one or more of an electron injection layer (EIL), an electron transport layer (ETL), and an electron block layer (EBL).

[0022] like Figure 2 As shown, the display panel 100 further includes a first pixel definition layer 21 and a second pixel definition layer 22. The first pixel definition layer 21 is located on one side of the substrate 1 and includes a first pixel opening 210. The second pixel definition layer 22 is located on a side of the first pixel definition layer 21 away from the substrate 1 and includes a second pixel opening 220. Along a direction h1 perpendicular to the plane of the substrate 1, the second pixel opening 220 at least partially overlaps the first pixel opening 210. The light-emitting layer 203 is at least partially located within the first pixel opening 210 and the second pixel opening 220. The second pixel opening 220 and the first pixel opening 210 define the light-emitting region of the sub-pixel 2.

[0023] like Figure 2 As shown, the display panel 100 includes a driving function layer 3 located on one side of the substrate 1. The driving function layer 3 includes a pixel driving circuit for driving the light-emitting element to emit light. Exemplarily, the driving function layer includes a semiconductor layer, a metal layer, and an insulating layer arranged in a stacked manner. The metal layer includes metal structures such as electrodes and wiring. Among them, the wiring includes scan lines and data lines electrically connected to the pixel driving circuit. The above-mentioned metal structure and the first electrode 201 of the light-emitting element will reflect the ambient light incident on their surfaces. The reflected light emitted from the display panel will affect the contrast of the display panel.

[0024] In an embodiment of the present invention, at least one of the first pixel definition layer 21 and the second pixel definition layer 22 includes a light-shielding material; the light-shielding material can absorb external ambient light and ambient light reflected by the reflective structure inside the display panel, which is beneficial to reducing the reflectivity of the display panel and improving the contrast of the display panel.

[0025] When manufacturing the display panel 100, the light-emitting layer 203 can be fabricated using a fine metal mask, with the light-emitting layers 203 of different sub-pixels 2 spaced apart from one another. Optionally, the common layer 204 can be fabricated using an open mask. Therefore, the common layer 204 is interconnected between two adjacent sub-pixels 2. That is, in the display panel 100, the common layer 204 typically comprises a structure that covers the entire surface of all sub-pixels 2. In related art, when a sub-pixel 2 is illuminated, in addition to the normal longitudinal migration of carriers from their respective cathodes and / or anodes to the corresponding light-emitting layer 203, carriers can also migrate laterally between different sub-pixels 2 through the common layer 204. This lateral flow of carriers between two adjacent sub-pixels generates lateral leakage current, leading to crosstalk between different sub-pixels when the display panel is displaying. For example, when the turn-on voltages of two adjacent sub-pixels 2 are close, the lateral leakage current can cause the sub-pixel 2 that does not need to be illuminated to appear to be illuminating.

[0026] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the display panel 100 further includes a partition portion 4 , which at least partially surrounds the first pixel opening 210 and the second pixel opening 220 .

[0027] like Figure 2 As shown, the partition 4 is located on the side of the common layer 204 that is closest to the substrate 1, along a direction perpendicular to the plane of the substrate 1. The partition 4 can increase the length of the common layer 204 between two adjacent sub-pixels 2, or alternatively, partition the common layer 204 between two adjacent sub-pixels 2. Therefore, the partition 4 can suppress lateral leakage current caused by the flow of carriers between two adjacent sub-pixels 2, prevent the light-emitting element from being strayed, and improve the display effect.

[0028] It is understood that the above “at least partially surround” includes “partially surround” and “surround”. Among them, “partially surround” refers to open surrounding. For example, Figure 1 As shown, the partition portion 4 includes a notch 40, that is, the partition portion 4 openly surrounds a sub-pixel 2. "Surrounding" refers to a closed surrounding. In other words, the partition portion 4 is a closed ring structure, and the surrounded sub-pixel 2 is located within the ring structure enclosed by the partition portion 4.

[0029] In the embodiment of the present invention, the partition portion 4 includes multiple implementations, which are described below respectively: like Figure 2 and Figure 3 As shown, Figure 3This is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention. In this embodiment of the present invention, the partition portion 4 can be configured to include a recessed portion 401 recessed toward one side of the substrate 1. Specifically, Figure 2 and Figure 3 As shown, the recessed portion 401 may be recessed from the surface of the second pixel definition layer 22 away from the first pixel definition layer 21 toward the side close to the first pixel definition layer 21 ; like Figure 2 and Figure 3 As shown, the recessed portion 401 includes a second side surface S21 and a second bottom surface S22 close to the substrate 1 .

[0030] Optional, such as Figure 2 As shown, in an embodiment of the present invention, the angle α between the second side surface S21 and the second bottom surface S22 can be an obtuse angle. Based on this arrangement, the common layer 204 formed after the recessed portion 401 is formed on the second side surface S21 of the recessed portion 401. Compared to setting the location of the recessed portion 401 as a planar structure, the arrangement of the recessed portion 401 can extend the path for the lateral leakage current to be transmitted between two adjacent sub-pixels 2 through the common layer 204, thereby suppressing the transmission of the lateral leakage current and improving the display effect of the display panel.

[0031] Exemplarily, 90°≤α≤135°. Based on this setting, while taking into account the yield of the preparation process of the recessed portion 401, a common layer 204 with a larger coverage area can also be formed on the second side surface S21 of the recessed portion 401, which is beneficial to further extend the lateral leakage current path and better improve the display effect of the display panel 100.

[0032] In another optional embodiment, as Figure 3 As shown, in an embodiment of the present invention, the angle α between the second side surface S21 and the second bottom surface S22 can also be an acute angle. Based on this arrangement, the common layer 204 formed after the recessed portion 401 will not be formed on the second side surface S21 of the recessed portion 401. As a result, the common layer 204 will be disconnected at the recessed portion 401. The path for the lateral leakage current to be transmitted between two adjacent sub-pixels 2 through the common layer 204 will be blocked, thereby suppressing the transmission of the lateral leakage current and improving the display effect of the display panel.

[0033] Or, as Figure 4 and Figure 5 As shown, Figure 4 and Figure 5 The cross-sectional schematic diagrams of two other display panels provided by the embodiments of the present invention, the partition portion 4 includes a first protrusion 402 protruding toward the side away from the substrate 1, illustratively, as shown in FIG. Figure 4 and Figure 5As shown, in the embodiment of the present invention, the first protrusion 402 may protrude from the surface of the second pixel definition layer 22 away from the first pixel definition layer 21 toward the side away from the first pixel definition layer 21 .

[0034] Optional, such as Figure 4 and Figure 5 As shown, the first protrusion 402 includes a first side surface S11 and a first bottom surface S12 close to the substrate 1 .

[0035] like Figure 4 As shown, in an embodiment of the present invention, the angle β between the first side surface S11 and the first bottom surface S12 toward the inside of the first protrusion 402 can be an obtuse angle, that is, the area of the side of the first protrusion 402 away from the substrate 1 is larger than the area of the side close to the substrate 1. In other words, the cross-sectional shape of the first protrusion 402 along a plane perpendicular to the substrate 1 is set to an inverted trapezoid. Based on this arrangement, the common layer 204 formed after the first protrusion 402 will not be formed on the first side surface S11 and will be disconnected at the first protrusion 402, thereby isolating the path for the lateral leakage current to be transmitted between two adjacent sub-pixels 2 through the common layer 204, thereby suppressing the transmission of the lateral leakage current and improving the display effect of the display panel.

[0036] Or, as Figure 5 As shown, in an embodiment of the present invention, the angle β between the first side surface S11 and the first bottom surface S12 toward the inside of the first protrusion 402 can be an acute angle, that is, the area of the side of the first protrusion 402 away from the substrate 1 is smaller than the area of the side close to the substrate 1. In other words, the cross-sectional shape of the first protrusion 402 along the plane perpendicular to the substrate 1 is set to a right trapezoid. Based on this setting, the common layer 204 formed after the first protrusion 402 is formed on the first side surface S11. Compared with the method of not setting the first protrusion 402 and setting the surface of the second pixel definition layer 22 at the position of the first protrusion 402 as a plane, the setting of the first protrusion 402 can extend the path of the lateral leakage current transmitted between two adjacent sub-pixels 2 through the common layer 204, thereby suppressing the transmission of the lateral leakage current and improving the display effect of the display panel.

[0037] From the above, it can be seen that the display panel 100 provided by the embodiment of the present invention, by setting a first pixel definition layer 21 and a second pixel definition layer 22 therein, and making at least one of the two include a shading material, the shading material can absorb external ambient light, as well as absorb ambient light reflected by the metal structure inside the display panel, thereby reducing the reflectivity of the display panel 100.

[0038] Moreover, the embodiment of the present invention provides a partition portion 4 in the display panel 100. The partition portion 4 can extend or block the lateral leakage path between two adjacent sub-pixels 2, thereby improving the problem of hidden brightness and improving the display effect of the display panel.

[0039] It should be noted that Figure 1 The arrangement of the sub-pixels 2 is for illustration only. Those skilled in the art may set the pixel arrangement of the sub-pixels 2 according to different display requirements. The embodiment of the present invention does not limit this but is not limited thereto.

[0040] For example, Figure 2 and Figure 3 As shown, in this embodiment of the present invention, the recessed portion 401 can be provided in the second pixel definition layer 22 and extend through the second pixel definition layer 22 in a direction perpendicular to the plane of the substrate 1. In other words, in this embodiment of the present invention, the depth of the recessed portion 401 can be equal to the thickness of the second pixel definition layer 22. Based on this arrangement, the depth of the recessed portion 401 can be increased, thereby accommodating more common layer 204 within the recessed portion 401. This, in turn, can further increase the length of the portion of the common layer 204 located between two adjacent sub-pixels 2, thereby effectively resolving the problem of sub-pixels 2 being too bright and improving the display effect.

[0041] Moreover, based on the double-layer structure of the first pixel definition layer 21 and the second pixel definition layer 22, when the recessed portion 401 passes through the second pixel definition layer 22, regardless of whether the recessed portion 401 and the first electrode 201 overlap in a direction perpendicular to the plane of the substrate 1, the first pixel definition layer 21 can separate the recessed portion 401 and the first electrode 201, thereby avoiding the patterning process of forming the recessed portion 401, such as the exposure process affecting the first electrode 201, which is beneficial to improving the structural reliability of the first electrode 201.

[0042] Optional, such as Figure 6 As shown, Figure 6 This is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention. The partition portion 4 includes a recessed portion 401. The depth of the recessed portion 401, along a direction perpendicular to the plane of the substrate 1, is less than the thickness of the second pixel definition layer 22. In other words, the recessed portion 401 does not penetrate the second pixel definition layer 22.

[0043] With this arrangement, when patterning processes such as photoresist coating, exposure, development, and etching are selected to form the second pixel definition layer 22 having the second pixel opening 220 and the recessed portion, the etching step can prevent the etchant from contacting the first pixel definition layer 21, thereby preventing the first pixel definition layer 21 from being affected by the etchant, which helps to protect the reliability of the first pixel definition layer 21. For example, when the first pixel definition layer 21 includes a light-shielding material, this can prevent the first pixel definition layer 21 from being affected by the etchant and fading, which would affect the light-shielding performance and thus increase the reflectivity of the display panel.

[0044] Optional, such as Figure 1 and Figure 7 As shown, Figure 7 A cross-sectional schematic diagram of another display panel provided in an embodiment of the present invention, wherein the display panel 100 further includes a support portion 5, which can improve the compressive strength of the display panel 100 and is used to support the mask used in the manufacturing process to prevent the mask from scratching other previously prepared film layers.

[0045] like Figure 7 As shown, the display panel 100 includes a non-luminous area located between two adjacent sub-pixels, wherein the non-luminous area includes a spacing area GA that is staggered with the support portion 5. The second pixel definition layer 22 includes a spacing portion 200 that is at least partially located in the spacing area GA. In other words, the spacing portion 200 is a portion of the second pixel definition layer 22 that avoids the second pixel opening 220 and the support portion 5. That is, along a direction perpendicular to the plane of the substrate 1, the spacing portion 200 and the support portion 5 are staggered with each other. Figure 7 As shown, the distance between the surface of the support portion 5 away from the substrate 1 and the substrate 1 is greater than the distance between the surface of the spacer 200 away from the substrate 1 and the substrate 1. Based on this arrangement, the distance between the support portion 5 and the second pixel definition layer 22 can be increased, which is beneficial for using the support portion 5 to support the mask used in the process of manufacturing the light-emitting layer.

[0046] For example, Figure 7 As shown, the display panel 100 includes a second protrusion 51 , which protrudes from the surface of the second pixel definition layer 22 away from the first pixel definition layer 21 toward a side away from the first pixel definition layer 21 ; the support portion 5 includes the second protrusion 51 .

[0047] Alternatively, embodiments of the present invention may allow the support portion 5 and the second pixel definition layer 22 to be formed in the same process to simplify the display panel manufacturing process and improve process efficiency. In this case, the support portion 5 and the second pixel definition layer 22 are made of the same material and do not include an interface between them.

[0048] Alternatively, the support portion 5 and the second pixel definition layer 22 may be formed in different processes. For example, the second pixel definition layer 22 having the second pixel opening 220 may be formed first, and then the support portion 5 may be prepared.

[0049] For example, Figure 8 As shown, Figure 8 This is another cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention. Display panel 100 includes a third protrusion 52. The third protrusion 52 protrudes from the surface of the first pixel definition layer 21 away from the substrate 1 toward the side away from the substrate 1. The third protrusion 52 is located between the first pixel definition layer 21 and the second pixel definition layer 22 in a direction perpendicular to the plane of the substrate 1. The support portion 5 includes the third protrusion 52.

[0050] It should be understood that Figure 8 The recessed portion 401 shown penetrating the second pixel definition layer 22 is merely an illustration. When the support portion 5 includes the third protrusion 52 , the embodiment of the present invention may also allow the depth of the recessed portion 401 to be less than the thickness of the second pixel definition layer 22 , that is, the recessed portion 401 does not penetrate the second pixel definition layer 22 .

[0051] Alternatively, embodiments of the present invention can form the support portion 5 and the first pixel definition layer 21 in the same process to simplify the display panel manufacturing process and improve process efficiency. In this case, the support portion 5 and the first pixel definition layer 21 are made of the same material and do not include an interface between them.

[0052] Alternatively, the support portion 5 and the first pixel definition layer 21 may be formed in different processes. For example, the first pixel definition layer 21 having the first pixel opening 210 may be formed first, and then the support portion 5 may be prepared.

[0053] For example, Figure 7 and Figure 8 As shown, the height b of the support portion 5 satisfies the following condition: b ≥ 1 μm. The height of the support portion 5 refers to the distance between the surface of the support portion 5 away from the substrate 1 and the surface of the support portion 5 close to the substrate 1. This arrangement ensures the support effect of the support portion 5. Furthermore, when the support portion 5 is used to support the mask, the distance between the mask and the previously formed film layer is increased, preventing the mask from affecting the previously formed film layer.

[0054] For example, Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 8As shown, the partition portion 4 includes a recessed portion 401 , and the depth a of the recessed portion 401 satisfies: a≥0.6 μm, so as to ensure that the common layer 204 accommodated in the recessed portion 401 has sufficient length to ensure that the leakage path of the lateral leakage current between two adjacent sub-pixels 2 is extended.

[0055] Optional, such as Figure 2 As shown, the shortest distance c between the edges of the first pixel opening 210 and the second pixel opening 220 satisfies: c ≥ 1.5 μm. For example, Figure 2 As an example, the area of the first pixel opening 210 is larger than the area of the second pixel opening 220, and the second pixel opening 220 is completely located within the first pixel opening 210. Based on this arrangement, the difficulty of aligning the first pixel opening 210 and the second pixel opening 220 during the manufacturing process can be reduced, which is conducive to improving the alignment accuracy of the two.

[0056] For example, Figure 2 As shown, the thickness d of the first pixel definition layer 21 satisfies: d≥1 μm. When the first pixel definition layer 21 is configured to include a light-shielding material, the light-shielding performance of the first pixel definition layer 21 can be improved.

[0057] Optional, such as Figure 2 As shown, the partition portion 4 includes a recessed portion 401, and the width e of the recessed portion 401 satisfies: e ≥ 2 μm, wherein the width direction of the recessed portion 401 is perpendicular to the extension direction of the recessed portion 401. Based on this arrangement, it is possible to ensure that the common layer 204 accommodated in the recessed portion 401 has a sufficient length to ensure that the leakage path of the lateral leakage current between two adjacent sub-pixels 2 is extended.

[0058] For example, in an embodiment of the present invention, the light-shielding material includes a photosensitive material. By selecting a photosensitive material to form the light-shielding material, the light-shielding material can be prepared by coating a light-shielding material layer, exposing the light-shielding material layer through a mask, and curing the light-shielding material layer to form a light-shielding material layer having a predetermined pattern. This eliminates the need to form a photoresist layer on the surface of the light-shielding material layer, and further eliminates the need to remove the photoresist layer, thereby simplifying the display panel manufacturing process.

[0059] Optionally, one of the first pixel definition layer 21 and the second pixel definition layer 22 comprises a positive photosensitive material, and the other comprises a negative photosensitive material. Based on this configuration, during the preparation of the first pixel definition layer 21 and the second pixel definition layer 22, the impact of the preparation process of one on the other can be reduced, which is beneficial for improving the production yield of the display panel.

[0060] Based on the same inventive concept, the embodiment of the present invention further provides a method for preparing a display panel, Figure 2 、 Figure 9 and Figure 10 As shown, Figure 9 and Figure 10 The present invention provides two flow charts of a method for manufacturing a display panel according to an embodiment of the present invention. The method for manufacturing a display panel includes: Step S1: providing a substrate 1; illustratively, as Figure 9 and Figure 10 As shown, the preparation method further includes the steps of forming a driving function layer 3 on one side of the substrate 1, and forming a first electrode 201 of the light-emitting element on the side of the driving function layer 3 away from the substrate 1. The driving function layer 3 includes a pixel driving circuit for driving the light-emitting element to light up; Step S2: forming a first pixel definition layer 21 on one side of the substrate 1 , wherein the first pixel definition layer 21 includes a first pixel opening 210 ; the first pixel opening 210 exposes at least a portion of the first electrode 201 ; Step S3: forming a second pixel definition layer 22 on the side of the first pixel definition layer 21 away from the substrate 1. In the embodiment of the present invention, at least one of the first pixel definition layer 21 and the second pixel definition layer 22 comprises a light shielding material; the provision of the light shielding material can reduce the reflectivity of the display panel. Figure 9 and Figure 10 As shown, the second pixel definition layer 22 includes a second pixel opening 220; along a direction h1 perpendicular to the plane of the substrate 1, the second pixel opening 220 at least partially overlaps with the first pixel opening 210; the second pixel opening 220 exposes at least a portion of the first electrode 201; and a partition portion 4 is formed that at least partially surrounds the first pixel opening 210 and the second pixel opening 220. The partition portion 4 can reduce the lateral leakage current of the display panel and improve the display effect of the display panel.

[0061] For example, Figure 9 As shown, the above step S3 includes step S3_1 of setting the partition portion 4 as a recessed portion 401, wherein the recessed portion 401 is recessed from the surface of the second pixel definition layer 22 away from the first pixel definition layer 21 to the side close to the first pixel definition layer 21; and / or Figure 10 As shown, the above step S3 includes step S3_2 of setting the partition portion 4 as a first protrusion 402, wherein the first protrusion 402 protrudes from the surface of the second pixel definition layer 22 away from the first pixel definition layer 21 to the side away from the first pixel definition layer 21.

[0062] It can be understood that the method for manufacturing the display panel provided in the embodiment of the present invention further includes forming a common layer and a second electrode after the partition portion 4 to obtain the following Figure 2 or Figure 4 The steps of the display panel are shown.

[0063] The method for preparing a display panel provided in an embodiment of the present invention provides a first pixel definition layer 21 and a second pixel definition layer 22 in the display panel, and at least one of the two includes a shading material. The shading material can absorb external ambient light incident on the display panel, as well as absorb ambient light reflected by the metal structure inside the display panel, thereby reducing the reflectivity of the display panel.

[0064] Moreover, the embodiment of the present invention provides a partition portion 4 in the display panel. The partition portion 4 can extend or block the lateral leakage path between two adjacent sub-pixels 2, thereby effectively solving the problem of hidden brightness and improving the display effect of the display panel.

[0065] When the partition part 4 is configured to include Figure 9 When the recessed portion 401 is shown, Figure 9 As shown, the recessed portion 401 may be recessed from the surface of the second pixel definition layer 22 toward the side close to the substrate 1. Figure 11 As shown, Figure 11 A schematic diagram of a method for preparing a second pixel definition layer provided in an embodiment of the present invention includes: Step S31: forming a first initial film layer 221 on a side of the first pixel definition layer 21 away from the substrate 1, wherein the first initial film layer 221 comprises a photosensitive material; Figure 11 As shown, the first initial film layer 221 can cover the first pixel opening 210; Step S32: providing a first mask M1, and exposing the first initial film layer 221 through the first mask M1; Figure 11 As shown, the first mask M1 includes a first transparent area M11 and a second transparent area M12; when the first mask M1 and the first initial film layer 221 are aligned, the first transparent area M11 is aligned with the first area A1, and the first area A1 is a predetermined area of the second pixel opening 220; and the second transparent area M12 is aligned with the second area A2; the second area A2 is a predetermined area of the recessed portion 401, wherein the first area A1 and the first pixel opening 210 at least partially overlap in their orthographic projection perpendicular to the plane of the substrate 1; the second area A2 at least partially surrounds the first area A1; Step S33: Remove the portions of the first initial film layer 221 located in the first area A1 and the second area A2 to obtain a second pixel definition layer 22 having a second pixel opening 220 in the first area A1 and a recessed portion 401 in the second area A2; along a direction perpendicular to the plane of the substrate 1, the second pixel opening 220 and the recessed portion 401 both penetrate the second pixel definition layer 22.

[0066] With this arrangement, the recessed portion 401 can be formed in the same manufacturing process as the second pixel opening 220, which is beneficial to reducing the manufacturing process of the display panel and simplifying the process flow. Moreover, in the embodiment of the present invention, by making the first initial film layer 221 include a photosensitive material, the first initial film layer 221 can be directly exposed when preparing the above-mentioned second pixel opening 220 and the recessed portion 401, without the need to introduce an additional step of coating a photoresist on the surface of the first initial film layer 221, which is beneficial to further simplify the manufacturing process of the display panel. In addition, based on this arrangement, it is helpful to set the angle between the side wall of the recessed portion 401 and the substrate 1 as large as possible, that is, the side wall of the recessed portion 401 can be made more inclined, which is more conducive to extending the length of the common layer subsequently covered on its surface, thereby helping to suppress lateral leakage current.

[0067] In the preparation of Figure 7 The recessed portion 401 of the structure shown is, for example, combined with Figure 12 、 Figure 13 and Figure 14 As shown, Figure 12 、 Figure 13 and Figure 14 Schematic diagrams of the processes of three other methods for manufacturing display panels provided in embodiments of the present invention, wherein the method for forming the recessed portion 401 includes: Step S31: forming a second initial film layer 222 on a side of the first pixel definition layer 21 away from the substrate 1 , wherein the second initial film layer 222 includes a second pixel opening 220 ; Step S32: The second initial film layer 222 is processed through a composition process to remove the portion of the second initial film layer 222 located in the first area A1. The first area A1 at least partially surrounds the second pixel opening 220, thereby obtaining a second pixel definition layer 22 having a recessed portion 401 in the first area A1. The depth of the recessed portion 401 is less than the thickness of the second pixel definition layer 22 along a direction perpendicular to the plane of the substrate 1. The composition process includes coating photoresist, exposure, development, and etching.

[0068] For example, Figure 13 As shown, the above step S31 includes: Step S311: forming an initial film layer 222 ′ on a side of the first pixel definition layer 21 away from the substrate 1 ; Step S312 : patterning the initial film layer 222 ′ to form a second pixel opening 220 in the initial film layer 222 ′; illustratively, the initial film layer 222 ′ includes a photosensitive material.

[0069] Optional, such as Figure 13 As shown, the above patterning process includes: Step S3121: providing a second mask M2, and exposing the initial film layer 222' through the second mask M2; Figure 13 As shown, the second mask M2 includes a first transparent area M21; when the second mask M2 and the initial film layer 222' are aligned, the first transparent area M21 is aligned with the first area A1, which is a predetermined area of the second pixel opening 220, wherein the first area A1 and the first pixel opening 210 at least partially overlap in their orthographic projection perpendicular to the plane of the substrate 1; Step S3122: The portion of the initial film layer 222' located in the first area A1 is removed, resulting in a second pixel definition layer 22 having a second pixel opening 220 in the first area A1. The second pixel opening 220 extends through the second pixel definition layer 22 in a direction perpendicular to the plane of the substrate 1. The second pixel definition layer 22 having the second pixel opening 220 is the aforementioned second initial film layer 222.

[0070] Specifically, such as Figure 14 As shown, the method of processing the second initial film layer 222 by patterning process includes: Step S321: Coating a photoresist layer 6 on the side of the second initial film layer 222 away from the substrate 1. The photoresist layer 6 includes a positive photoresist or a negative photoresist. The following description takes the positive photoresist as an example. Step S322: providing a third mask M3, and exposing the photoresist layer 6 through the third mask M3; wherein the third mask M3 includes a transparent region M31, and when the third mask M3 and the second initial film layer 222 are aligned, the transparent region M31 is aligned with the second area A2; the second area A2 is a predetermined area of the recessed portion 401; Step S323: removing the portion of the photoresist layer 6 corresponding to the transmission area M31; Step S324: etching the portion of the second initial film layer 222 not covered by the photoresist layer 6 to obtain a second pixel definition layer 22 having a recessed portion 401. Figure 14 As shown, the depth of the recessed portion 401 is less than the depth of the second pixel definition layer 22 , that is, the recessed portion 401 does not penetrate the second pixel definition layer 22 .

[0071] Step S325: stripping the photoresist layer 6.

[0072] With this arrangement, in step S324, the etchant forming the recessed portion 401 can be prevented from contacting the first pixel definition layer 21, thereby preventing the first pixel definition layer 21 from being affected by the etchant, and thus helping to protect the reliability of the first pixel definition layer 21. For example, when the first pixel definition layer 21 includes a light-shielding material, this can prevent the first pixel definition layer 21 from being affected by the etchant, causing discoloration that affects the light-shielding performance and thus increases the reflectivity of the display panel.

[0073] For example, Figure 7 and Figure 8 As shown, the method for manufacturing a display panel further includes forming a support portion 5 on a side of the first pixel definition layer 21 away from the substrate 1. The support portion 5 can improve the compressive strength of the display panel 100 and is used to support the mask used in the manufacturing process to prevent the mask from scratching other previously prepared film layers.

[0074] For example, Figure 15 As shown, Figure 15 A schematic diagram of another method for manufacturing a display panel provided in an embodiment of the present invention is provided, wherein Figure 7 The method of supporting portion 5 shown includes: Step S51: forming a third initial film layer 223 on a side of the first pixel definition layer 21 away from the substrate 1; the first pixel definition layer 21 includes a first pixel opening 210, and the third initial film layer 223 can fill the first pixel opening 210; the third initial film layer 223 includes a photosensitive material; Step S52: providing a half-grayscale mask M4, and patterning the third initial film layer 223 by using the half-grayscale mask M4, such as Figure 15 As shown, the half-grayscale mask M4 includes a first transparent area M41, a second transparent area M42 and a light-shielding area M43; the light transmittance of the first transparent area M41 is greater than the light transmittance of the second transparent area M42; when the half-grayscale mask M4 is aligned with the third initial film layer 223, the embodiment of the present invention can align the first transparent area M41 with the first area A1, which is the preset area of the second pixel opening 220; and align the second transparent area M42 with the third area A3, wherein the third area A3 is the area in the display panel where the second pixel opening, the supporting portion and the recessed portion are not formed; and align the light-shielding area M43 with the fourth area A4, which is the preset area of the supporting portion 5; wherein the first area A1 and the above-mentioned first pixel opening 210 at least partially overlap in their orthographic projection perpendicular to the plane where the substrate 1 is located; Step S53: completely remove the portion of the third initial film layer 223 corresponding to the first transparent area M41 to form the second pixel opening 220; and partially remove the portion of the third initial film layer 223 corresponding to the second transparent area M42 to form the spacer 200 of the second pixel definition layer 22 avoiding the second pixel opening 220 and the support portion 5, and retain the portion of the third initial film layer 223 corresponding to the light shielding area M13 to form the support portion 5. Figure 15 As shown, the distance between the surface of the spacer 200 away from the substrate 1 and the substrate 1 is smaller than the distance between the surface of the support portion 5 away from the substrate 1 and the substrate 1 .

[0075] With this arrangement, the second pixel definition layer 22 and the support portion 5 can be formed simultaneously in one process, which is beneficial for reducing the process complexity of the display panel and improving the process efficiency.

[0076] For example, after the above step S53, the method for manufacturing a display panel provided by the embodiment of the present invention further includes providing a third mask to etch the second pixel definition layer 22 to form the recessed portion 401. This part of the process can be referred to Figure 14 Steps S321 to S325 are executed as shown and will not be repeated here.

[0077] For example, Figure 16 As shown, Figure 16 A schematic diagram of a method for manufacturing a display panel according to an embodiment of the present invention is provided, wherein Figure 7 Another method of supporting the portion 5 shown includes: Step S61: forming a fourth initial film layer 224 on a side of the first pixel definition layer 21 away from the substrate 1 , wherein the fourth initial film layer 224 may cover the first pixel opening 210 in the first pixel definition layer 21 ; Step S62 : patterning the fourth initial film layer 224 to form a second pixel definition layer 22 including a second pixel opening 220 ; Step S63: forming a fifth initial film layer 225 on a side of the second pixel definition layer 22 away from the substrate 1; Step S64 : patterning the fifth initial film layer 225 to form a support portion 5 .

[0078] Exemplarily, the fifth initial film layer 225 includes a photosensitive material, and accordingly, the patterning process includes exposure and curing; wherein, Figure 16 As shown, the exposure process includes: Step S641: Provide Figure 16The fifth mask M5 shown includes a first transparent area M51 and a light-shielding area M52. The fifth initial film layer 225 is exposed through the fifth mask M5. When the fifth mask M5 and the fifth initial film layer 225 are aligned, if the fifth initial film layer 225 includes a positive photosensitive material, the light-shielding area M52 can be aligned with the fourth area A4, which is a predetermined area of the support portion 5. Step S642 : removing the portion of the fifth initial film layer 225 except the portion corresponding to the light-shielding area M52 . The portion of the fifth initial film layer 225 corresponding to the light-shielding area M52 that is not removed forms the support portion 5 .

[0079] Alternatively, the fifth initial film layer 225 may not include a photosensitive material. In this case, the patterning process includes the steps of coating photoresist on the side of the fifth initial film layer 225 away from the substrate 1, exposing, developing, etching, and removing the photoresist.

[0080] For example, the fourth initial film layer 224 may include a photosensitive material. Accordingly, the patterning process in step S62 includes exposure and curing. The exposure process refers to providing a photosensitive material. Figure 13 The fourth initial film layer 224 is exposed through the second mask M2. Alternatively, the fourth initial film layer 224 may not include a photosensitive material, and the patterning process includes the steps of coating a photoresist on the side of the fourth initial film layer 224 away from the substrate, exposing, developing, etching, and removing the photoresist.

[0081] Optionally, forming a Figure 8 The method for arranging the support portion 5 in the manner shown includes: forming the support portion 5 between the first pixel definition layer 21 and the second pixel definition layer 22. Specifically, Figure 17 As shown, Figure 17 A schematic flow chart of another method for manufacturing a display panel provided in an embodiment of the present invention includes: Step S71: forming an initial film layer 211 on a side of the first electrode 201 away from the substrate 1; illustratively, the initial film layer 211 includes a photosensitive material; Step S72: providing a half-grayscale mask M6, and patterning the initial film layer 211 by using the half-grayscale mask M6, such as Figure 17 As shown, the half-grayscale mask M6 includes a first transmission area M61, a second transmission area M62 and a light-shielding area M63; the light transmittance of the first transmission area M61 is greater than the light transmittance of the second transmission area M62; when the second half-grayscale mask M6 is aligned with the initial film layer 211, for example, Figure 17As shown, in the embodiment of the present invention, the first transparent area M61 and the sixth area A6 can be aligned, and the sixth area A6 is a predetermined area of the first pixel opening 210 in the display panel; and the second transparent area M62 and the seventh area A7 are aligned, wherein the seventh area A7 is an area of the display panel where the first pixel opening 210 and the support portion 5 are not formed; and the light shielding area M13 and the fourth area A4 are aligned, and the fourth area A4 is a predetermined area of the support portion 5; wherein the orthographic projection of the sixth area A6 and the first electrode 201 perpendicular to the plane where the substrate 1 is located at least partially overlap; Step S73: Completely remove the portion of the initial film layer 211 corresponding to the first transparent area M61 to form the first pixel opening 210; and partially remove the portion of the initial film layer 211 corresponding to the second transparent area M62 to form a spacer 200 in the first pixel definition layer 21 that avoids the above-mentioned first pixel opening 210 and the support portion 5, and retain the portion of the initial film layer 211 corresponding to the shading area M63 to form the support portion 5.

[0082] With this arrangement, the first pixel definition layer 21 and the support portion 5 can be formed simultaneously in one process, which is beneficial for reducing the process complexity of the display panel and improving the process efficiency.

[0083] Alternatively, in the embodiment of the present invention, the first pixel opening 210 and the support portion 5 may be formed in different steps to better modify the morphologies of the first pixel opening 210 and the support portion 5 .

[0084] Based on the same inventive concept, an embodiment of the present invention further provides a display device, such as Figure 18 As shown, Figure 18 Schematic diagram of a display device provided by an embodiment of the present invention, the display device includes the above-mentioned display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiment and will not be repeated here. Figure 18 The display device shown is for illustration only, and the display device may be any device with a display function, such as a mobile phone, a tablet computer, a laptop computer, an e-reader, a television, a smartwatch, etc. The embodiments of the present invention are not limited thereto.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; a first pixel definition layer, located on one side of the substrate, wherein the first pixel definition layer includes a first pixel opening; a second pixel definition layer located on a side of the first pixel definition layer away from the substrate, at least one of the first pixel definition layer and the second pixel definition layer comprising a light-shielding material; the second pixel definition layer comprising a second pixel opening, wherein the second pixel opening at least partially overlaps the first pixel opening along a direction perpendicular to the plane of the substrate; a light-emitting layer, wherein at least a portion of the light-emitting layer is located within the first pixel opening and the second pixel opening; a partition portion at least partially surrounding the first pixel opening and the second pixel opening; the partition portion comprising a recessed portion and / or a first raised portion, the recessed portion being recessed from a surface of the second pixel definition layer away from the first pixel definition layer toward a side closer to the first pixel definition layer; The first protrusion protrudes from a surface of the second pixel definition layer away from the first pixel definition layer toward a side away from the first pixel definition layer.

2. The display panel according to claim 1, wherein: The partition portion includes a recessed portion, and the recessed portion penetrates the second pixel definition layer along a direction perpendicular to the plane where the substrate is located.

3. The display panel according to claim 1, wherein: The partition portion includes a recessed portion, and along a direction perpendicular to the plane where the substrate is located, the depth of the recessed portion is less than the thickness of the second pixel definition layer.

4. The display panel according to claim 1, wherein: Also includes a support portion, The second pixel definition layer includes a spacer portion, and along a direction perpendicular to the plane where the substrate is located, the spacer portion and the support portion are staggered with each other; A distance between a surface of the support portion remote from the substrate and the substrate is greater than a distance between a surface of the spacer portion remote from the substrate and the substrate.

5. The display panel according to claim 4, wherein: comprising a second protrusion, the second protrusion protruding from a surface of the second pixel definition layer away from the first pixel definition layer toward a side away from the first pixel definition layer; The supporting portion includes the second protrusion.

6. The display panel according to claim 5, wherein: The supporting portion and the second pixel definition layer are formed in the same process.

7. The display panel according to claim 4, wherein: comprising a third protrusion, the third protrusion protruding from a surface of the first pixel definition layer away from the substrate toward a side away from the substrate; The supporting portion includes the third protrusion.

8. The display panel according to claim 7, wherein: The supporting portion and the first pixel definition layer are formed in the same process.

9. The display panel according to claim 4, wherein: The height b of the support portion satisfies: b≥1 μm.

10. The display panel according to claim 1, wherein The partition portion includes a recessed portion, and a depth a of the recessed portion satisfies: a≥0.6 μm.

11. The display panel according to claim 1, wherein The shortest distance c between the edges of the first pixel opening and the second pixel opening satisfies: c≧1.5 μm.

12. The display panel according to claim 1, wherein The thickness d of the first pixel definition layer satisfies: d≥1 μm.

13. The display panel according to claim 1, wherein The partition portion includes a recessed portion, and a width e of the recessed portion satisfies: e≥2 μm, wherein a width direction of the recessed portion is perpendicular to an extending direction of the recessed portion.

14. The display panel according to claim 1, wherein The light-shielding material includes a photosensitive material.

15. The display panel according to claim 1, wherein One of the first pixel definition layer and the second pixel definition layer includes a positive photosensitive material, and the other includes a negative photosensitive material.

16. A method for preparing a display panel, characterized in that: include: providing a substrate; forming a first pixel definition layer on one side of the substrate, wherein the first pixel definition layer includes a first pixel opening; forming a second pixel definition layer on a side of the first pixel definition layer away from the substrate, wherein at least one of the first pixel definition layer and the second pixel definition layer comprises a light shielding material; and the second pixel definition layer comprises a second pixel opening; Along a direction perpendicular to the plane of the substrate, the second pixel opening at least partially overlaps with the first pixel opening; forming a partition portion at least partially surrounding the first pixel opening and the second pixel opening, the partition portion comprising a recessed portion and / or a first raised portion, the recessed portion being recessed from a surface of the second pixel definition layer away from the first pixel definition layer toward a side closer to the first pixel definition layer; The first protrusion protrudes from a surface of the second pixel definition layer away from the first pixel definition layer toward a side away from the first pixel definition layer.

17. The method for manufacturing a display panel according to claim 16, wherein: The partition portion includes a recessed portion, and a method for forming the second pixel definition layer includes: forming a first initial film layer on a side of the first pixel definition layer away from the substrate, wherein the first initial film layer comprises a photosensitive material; exposing the first initial film layer; Remove portions of the first initial film layer located in the first area and the second area, wherein the first area is a preset area of the second pixel opening, and the second area at least partially surrounds the second pixel opening, thereby obtaining the second pixel definition layer having the second pixel opening in the first area and the recessed portion in the second area, wherein the recessed portion penetrates the second pixel definition layer in a direction perpendicular to the plane of the substrate.

18. The method for manufacturing a display panel according to claim 16, wherein: The partition portion includes a recessed portion, and a method for forming the recessed portion includes: forming a second initial film layer on a side of the first pixel definition layer away from the substrate; The second initial film layer is processed through a composition process to remove the portion of the second initial film layer located in the first area, and the first area at least partially surrounds the second pixel opening, thereby obtaining the second pixel definition layer having the recessed portion in the first area, and the depth of the recessed portion along the direction perpendicular to the plane of the substrate is less than the thickness of the second pixel definition layer; the composition process includes coating photoresist, exposure, etching and development.

19. The method for manufacturing a display panel according to claim 16, wherein: Also includes: A supporting portion is formed on a side of the first pixel definition layer away from the substrate.

20. The method for manufacturing a display panel according to claim 19, wherein: The method of forming the support portion comprises: forming a third initial film layer on a side of the first pixel definition layer away from the substrate; Providing a half-grayscale mask to pattern the third initial film layer, the half-grayscale mask comprising a first transmission area, a second transmission area, and a light-shielding area; the light transmittance of the first transmission area is greater than the light transmittance of the second transmission area; The portion of the third initial film layer corresponding to the first transmission area is completely removed to form the second pixel opening; and the portion of the third initial film layer corresponding to the second transmission area is partially removed to form the second pixel definition layer, and the portion of the third initial film layer corresponding to the shading area is retained to form the supporting portion.

21. The method for manufacturing a display panel according to claim 19, wherein: The method of forming the support portion comprises: forming a fourth initial film layer on a side of the first pixel definition layer away from the substrate, patterning the fourth initial film layer to form the second pixel definition layer including the second pixel opening; forming a fifth initial film layer on a side of the second pixel definition layer away from the substrate, The fifth initial film layer is patterned to form the support portion.

22. The method for manufacturing a display panel according to claim 19, wherein: The method of forming the support portion includes: The supporting portion is formed between the first pixel definition layer and the second pixel definition layer.

23. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 22.

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