Display panel, display apparatus, and preparation method for display panel

Abstract

Disclosed in the present application are a display panel, a display apparatus, and a preparation method for a display panel. The display panel comprises: a substrate; a pixel definition layer, which is arranged on one side of the substrate, wherein the pixel definition layer comprises a pixel definition portion and a pixel opening defined by the pixel definition portion; a first mask portion, which is located on the side of the pixel definition portion that faces away from the substrate, and comprises a first opening that is provided in a penetrating manner in the thickness direction of the display panel; and a first electrode, which is located on the side of the pixel definition layer that faces away from the substrate, and on the side of the first mask portion that faces away from the substrate, wherein the first electrode comprises a second opening that is provided in a penetrating manner in the thickness direction, and an orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the first opening on the substrate. The present application can ameliorate the problem of an edge of a first electrode that faces a second opening being prone to upturning, such that the yield of a subsequent encapsulation layer is prevented from being affected by an upturned first electrode, thereby improving the reliability of encapsulation of a display panel.

Description

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

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202310707276.2, filed on June 13, 2023, entitled “Display Panel, Display Device, and Method for Preparing Display Panel,” and the entire contents of that application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0004] Organic Light Emitting Display (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, power saving, thin body, and wide range of applications, becoming the mainstream display device.

[0005] However, the packaging reliability of current OLED display products needs to be improved after cathode patterning.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel, which can improve the reliability of packaging.

[0008] An embodiment of the first aspect of the present application provides a display panel, which includes: a substrate; a pixel definition layer, which is arranged on one side of the substrate, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion; a first mask portion, which is located on the side of the pixel defining portion facing away from the substrate, the first mask portion including a first opening which is arranged to pass through along the thickness direction of the display panel; a first electrode, which is located on the side of the pixel definition layer facing away from the substrate and on the side of the first mask portion facing away from the substrate, the first electrode including a second opening which is arranged to pass through along the thickness direction, the orthographic projection of the second opening on the substrate at least partially overlapping with the orthographic projection of the first opening on the substrate.

[0009] An embodiment of a second aspect of the present application provides a display device, comprising the display panel provided by any of the above-mentioned embodiments of the first aspect.

[0010] An embodiment of a third aspect of the present application provides a method for manufacturing a display panel, including:

[0011] A pixel definition layer is prepared on one side of the substrate, wherein the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion;

[0012] preparing a first mask portion on a side of the pixel defining portion facing away from the substrate, the first mask portion comprising a first opening arranged along a thickness direction of the display panel;

[0013] forming an organic material layer on a side of the first mask portion facing away from the substrate;

[0014] A first electrode material layer is provided on the side of the organic material layer facing away from the substrate, and the first electrode material layer is patterned to form a first electrode including a second opening, wherein the orthographic projection of the second opening on the substrate at least partially overlaps the orthographic projection of the first opening on the substrate.

[0015] In a display panel provided in an embodiment of the present application, the display panel includes a pixel definition layer disposed on a substrate, a first mask portion, and a first electrode. The pixel definition layer includes a pixel defining portion and a pixel opening, wherein the pixel opening is used to provide a light-emitting unit to achieve light-emitting display on the display panel. The first electrode includes a second opening extending through the thickness direction, which can reduce the distribution area of ​​the first electrode and improve the light transmittance of the display panel. The first mask portion includes a first opening extending through the thickness direction, allowing laser light, etc., to pass through the first opening. The orthographic projection of the second opening on the substrate at least partially overlaps the orthographic projection of the first opening on the substrate. Laser light incident on the first opening can form the second opening on the first electrode. Because the first mask portion is located on the side of the pixel defining portion facing away from the substrate, a thickness difference can be formed at the edge of the first mask portion facing the first opening. The first electrode has a relatively weak connection at the first opening of the first mask portion. When the first mask portion is used as a mask for laser patterning of the first electrode, the first electrode is more likely to break at the edge of the first opening. This can alleviate the problem of the first electrode's edge tending to warp upward toward the second opening, thereby preventing the warped first electrode from affecting the yield of subsequent packaging layers and improving the reliability of the display panel packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application;

[0017] FIG2 is a cross-sectional view of FIG1 at AA;

[0018] FIG3 is a cross-sectional view at BB in FIG1 ;

[0019] FIG4 is a cross-sectional view at BB in FIG1 in another example;

[0020] FIG5 is a cross-sectional view of a point BB in FIG1 in another example;

[0021] FIG6 is a schematic diagram of a partially enlarged structure of point I in FIG2 in an example;

[0022] FIG7 is a schematic diagram of a partially enlarged structure of point I in FIG2 in another example;

[0023] FIG8 is a schematic diagram of a partially enlarged structure of point I in FIG2 in another embodiment;

[0024] FIG9 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present application;

[0025] FIG10 is a schematic flow chart of a method for manufacturing a display panel according to another embodiment of the present application. DETAILED DESCRIPTION

[0026] As shown in Figures 1 to 3, an embodiment of the first aspect of the present application provides a display panel, comprising a substrate 100, a pixel definition layer 200, a first mask portion 300, and a first electrode 400. The pixel definition layer 200 is disposed on one side of the substrate 100 and includes a pixel defining portion 210 and a pixel opening 220 enclosed by the pixel defining portion 210. The first mask portion 300 is located on a side of the pixel defining portion 210 facing away from the substrate 100 and includes a first opening 310 extending through the display panel in a thickness direction Z. The first electrode 400 is located on both a side of the pixel definition layer 200 facing away from the substrate 100 and a side of the first mask portion 300 facing away from the substrate 100. The first electrode 400 includes a second opening 410 extending through the display panel in the thickness direction Z. The orthographic projection of the second opening 410 on the substrate 100 at least partially overlaps with the orthographic projection of the first opening 310 on the substrate 100.

[0027] In the display panel provided in the embodiment of the present application, the display panel includes a substrate 100, a pixel definition layer 200, a first mask portion 300, and a first electrode 400 provided on the substrate 100. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220. The pixel opening 220 is used to set a light-emitting unit to achieve a light-emitting display of the display panel. The first electrode 400 includes a second opening 410 provided along the thickness direction Z, which can reduce the distribution area of ​​the first electrode 400 and improve the transmittance of the display panel. The first mask portion 300 includes a first opening 310 provided along the thickness direction Z, so that laser light or the like can pass through the first opening 310. The orthographic projection of the second opening 410 on the substrate 100 at least partially overlaps with the orthographic projection of the first opening 310 on the substrate 100. The second opening 410 can be formed on the first electrode 400 by incident laser light through the first opening 310. Since the first mask portion 300 is located on the side of the pixel defining portion 210 facing away from the substrate 100, a thickness difference can be formed at the edge of the first mask portion 300 facing the first opening 310. The connection of the first electrode 400 at the first opening 310 of the first mask portion 300 is relatively weak. When the first mask portion 300 is used as a mask to perform laser patterning on the first electrode 400, the first electrode 400 is more likely to break at the edge of the first opening 310. This can improve the problem of the edge of the first electrode 400 facing the second opening 410 being easily warped, thereby preventing the warped first electrode 400 from affecting the yield of the subsequent packaging layer, thereby improving the reliability of the display panel packaging.

[0028] The substrate 100 may include a substrate and an array substrate disposed on one side of the substrate. The array substrate includes a first conductive layer, a second conductive layer, and a third conductive layer stacked together. An insulating layer is disposed between adjacent conductive layers. Exemplarily, the drive circuit disposed on the array substrate includes a transistor and a storage capacitor. The transistor includes a semiconductor, a gate, a source, and a drain. The storage capacitor includes a first plate and a second plate. As an example, the gate and the first plate may be located in the first conductive layer, the second plate may be located in the second conductive layer, and the source and drain may be located in the third conductive layer.

[0029] Optionally, the orthographic projection of the second opening 410 on the substrate 100 completely overlaps with the orthographic projection of the first opening 310 on the substrate 100. In FIG1 , the second opening 410 is located at the same position as the first opening 310, and the positions of the second opening 410 and the first opening 310 are illustrated as the same opening structure. In other embodiments, the orthographic projection of the second opening 410 on the substrate 100 may not completely overlap with the orthographic projection of the first opening 310 on the substrate 100. In a top view of the display panel, some of the second opening 410 and the first opening 310 are misaligned and do not overlap to form the same opening structure.

[0030] Optionally, the display panel further includes an encapsulation layer, which is disposed on a side of the first electrode 400 facing away from the substrate 100. In the embodiment of the present application, the first mask portion 300 is disposed on a side of the pixel defining portion 210 facing away from the substrate 100. The distance between the first mask portion 300 and the first electrode 400 is relatively small. When the first mask portion 300 is used to pattern the first electrode 400 to form the second opening 410, the edge of the first electrode 400 facing the second opening 410 is less likely to warp upward, thereby reducing the impact of the warping of the first electrode 400 on the encapsulation layer and thereby improving the encapsulation performance of the encapsulation layer.

[0031] Optionally, the display panel further includes a second electrode layer 600, which is located on the side of the pixel definition layer 200 facing the substrate 100. The second electrode layer 600 includes a plurality of second electrodes 610 spaced apart from each other, each second electrode 610 corresponding to each pixel opening 220. The second electrodes 610 interact with the first electrodes 400 to drive the light-emitting units within the pixel openings 220 to emit light. One of the first electrode 400 and the second electrode 610 is an anode, and the other is a cathode. This embodiment of the present application uses the first electrode 400 as a cathode and the second electrode 610 as an anode as an example.

[0032] In some optional embodiments, referring to both FIG1 and FIG4 , the display panel further includes an organic material layer 500, which is located on a side of the first mask portion 300 facing away from the substrate 100. The organic material layer 500 includes a through hole 510 extending therethrough in the thickness direction Z, and the first electrode 400 is electrically connected to the first mask portion 300 via the through hole 510.

[0033] In these optional embodiments, the first electrode 400 is electrically connected to the first mask portion 300 via the through hole 510 , which can reduce the impedance of the first electrode 400 layer and improve the display effect of the display panel.

[0034] In other embodiments, as shown in FIG. 3 , the organic material layer 500 may not be provided with through holes.

[0035] Optionally, the organic material layer 500 includes a common layer, for example, the organic material layer 500 includes at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

[0036] 1 and 4 , the orthographic projection of the through hole 510 on the substrate 100 is located within the orthographic projection of the pixel defining portion 210 on the substrate 100. This allows the through hole 510 and the pixel opening 220 to be staggered, preventing the through hole 510 from affecting the luminous effect of the light-emitting unit.

[0037] Optionally, the orthographic projection of the through hole 510 on the substrate 100 is located within the orthographic projection of the first mask portion 300 on the substrate 100. Ensure that the area of ​​the first mask portion 300 exposed by the through hole 510 is large enough so that the first electrode 400 is electrically connected to the first mask portion 300 via the through hole 510.

[0038] Optionally, the orthographic projection of the through hole 510 on the substrate 100 does not overlap with the orthographic projection of the first opening 310 on the substrate 100. Avoiding overlap between the through hole 510 and the first opening 310 results in a smaller area of ​​the first mask portion 300 exposed by the through hole 510, thereby affecting the electrical connection between the first electrode 400 and the first mask portion 300.

[0039] Optionally, the plurality of through holes 510 are spaced apart. By providing the plurality of through holes 510 , the connection area between the first electrode 400 and the first mask portion 300 can be increased, and the impedance of the first electrode 400 can be further reduced.

[0040] Optionally, at least one through-hole 510 is provided between two adjacent pixel openings 220 along the first direction X, and the first opening 310 is located on one side of the through-hole 510 in the second direction Y, where the first direction X and the second direction Y intersect. Providing through-holes 510 between adjacent pixel openings 220 along the first direction X increases the number of through-holes 510, further reducing the impedance of the first electrode 400. Providing the first opening 310 on one side of the through-hole 510 in the second direction Y prevents the first opening 310 and the through-hole 510 from communicating with each other, thereby preventing the electrical connection between the first electrode 400 and the first mask portion 300 from being affected.

[0041] Optionally, as shown in FIG5 , an insulating layer 800 is provided between the first mask portion 300 and the organic material layer 500 to improve the electrical connection between the organic material layer 500 and the first mask portion 300, thereby preventing the display panel from luminous effects. Optionally, when the organic material layer 500 is provided with a through hole 510 for electrically connecting the first electrode 400 and the first mask portion 300, the insulating layer 800 is also provided with a through hole for electrically connecting the first electrode 400 and the first mask portion 300.

[0042] In some optional embodiments, as shown in FIG. 1 , the first opening 310 extends along a first direction X, and a plurality of first openings 310 are spaced apart along a second direction Y, where the first direction X and the second direction Y intersect.

[0043] In these optional embodiments, the first opening 310 extends along the first direction X, which can increase the distribution area of ​​a single first opening 310. By arranging multiple first openings 310 to be spaced apart along the second direction Y, the first electrode 400 can be interconnected between adjacent first openings 310, and the total area of ​​the first openings 310 can be increased, thereby improving the transmittance of the first electrode 400.

[0044] Optionally, the first opening 310 is formed to extend along the first direction X, that is, the extension dimension of the first opening 310 in the first direction X is greater than its extension dimension in the second direction Y. Optionally, the first opening 310 is located between two adjacent columns of pixel openings 220 along the second direction Y to prevent the first opening 310 from affecting the light emission of the light-emitting unit.

[0045] Optionally, the display panel may include a display area, and the display area may include a first display area and a second display area surrounding at least part of the first display area. The transmittance of the first display area is greater than the transmittance of the second display area. The first display area can be used to set up photosensitive elements such as an under-screen camera.

[0046] Optionally, as shown in FIG1 , the first opening 310 is located in the first display area and can extend within the first display area along the first direction X to the boundary between the first display area and the second display area. The first opening 310 is not located in the second display area, so that the first electrodes 400 can be interconnected within the second display area.

[0047] Alternatively, the display panel includes a display area and a non-display area surrounding at least part of the display area. The first opening 310 extends along the first direction X in the display area to the display area and the non-display area. The extended size of the first opening 310 is large, which can improve the transmittance of the display area.

[0048] Optionally, the size of the second openings 410 matches the size of the first openings 310, for example, the orthographic projection of the second openings 410 on the substrate 100 completely overlaps the orthographic projection of the first openings 310 on the substrate 100. Therefore, as shown in FIG1 , the distribution pattern of the second openings 410 and the distribution pattern of the first openings 310 can be the same.

[0049] Optionally, when the size of the second openings 410 is different from the size of the first openings 310, the distribution pattern of the second openings 410 may also be different from the distribution pattern of the first openings 310. For example, the distance between two adjacent second openings 410 along the second direction Y may be different from the distance between two adjacent first openings 310 along the second direction Y.

[0050] In some optional embodiments, the first electrode 400 includes a first division 420 and a second division 430 connected to each other, the first division 420 extends along the first direction X, and multiple first divisions 420 are arranged at intervals along the second direction Y, and the second division 430 is located on at least one side of the first division 420 in the first direction X and is used to connect at least two adjacent first divisions 420.

[0051] In these optional embodiments, the first electrode 400 includes a first subsection 420 and a second subsection 430, which enclose the second opening 410. The first subsection 420 extends along the first direction X and is located between two adjacent second openings 410. The second subsection 430 is located at one end of the first subsection 420 and the second opening 410 in the first direction X to connect the adjacent first subsections 420, so that the first subsection 420 and the second subsection 430 are interconnected to form a full-surface electrode.

[0052] In some optional embodiments, the thickness of the first mask portion 300 is greater than or equal to 1000 angstroms. The greater thickness of the first mask portion 300 allows a height difference to be formed at the edge of the second opening 410 of the first mask portion 300. This causes the connection of the first electrode 400 at the edge of the second opening 410 to be weak and easily disconnected when the first electrode 400 is formed after the first mask portion 300.

[0053] Optionally, the material of the first mask portion 300 includes a conductive material, so that when the first mask portion 300 and the first electrode 400 are connected, the impedance of the first electrode 400 can be reduced.

[0054] Optionally, the material of the first mask portion 300 includes one or more of silver, indium tin oxide, molybdenum, titanium or aluminum, so that the first mask portion 300 not only has good conductivity, but also has stable performance, and is not easily deformed when the first electrode 400 is patterned using the first mask portion 300.

[0055] In some optional embodiments, as shown in Figures 6 to 8, the first mask portion 300 includes a first bottom surface 330 facing the pixel definition layer 200 and a first top surface 320 facing away from the pixel definition layer 200. The orthographic projection of the first bottom surface 330 on the substrate 100 is located within the orthographic projection of the first top surface 320 on the substrate 100. In these optional embodiments, the size of the first bottom surface 330 is smaller than or equal to the size of the first top surface 320, so that the first electrode 400 is easily disconnected at the location of the first mask portion 300.

[0056] Alternatively, as shown in FIG7 , the cross-sectional area of ​​the first mask portion 300 gradually decreases as it approaches the substrate; or, as shown in FIG8 , the first mask portion 300 includes a first sublayer and a second sublayer located on the side of the first sublayer facing away from the substrate, with the orthographic projection of the first sublayer on the substrate located within the orthographic projection of the second sublayer on the substrate. This allows a concave to be formed under the first top surface 320, making the first electrode 400 extremely susceptible to fracture at the edge of the first mask portion 300 facing the second opening.

[0057] Optionally, as shown in Figure 1, the orthographic projection of the second opening 410 on the substrate 100 is located within the orthographic projection of the first opening 310 on the substrate 100, and the size of the second opening 410 is smaller than or equal to the first opening 310. The first electrode 400 can be patterned through the first opening 310 to form the second opening 410.

[0058] In some optional embodiments, as shown in FIG2 , the display panel further includes a second mask portion 700. The second mask portion 700 is disposed on a side of the substrate 100 facing away from the pixel definition layer 200. The orthographic projection of the first electrode 400 on the substrate 100 and the orthographic projection of the second mask portion 700 on the substrate 100 at least partially overlap. In these optional embodiments, the first mask portion 300 and the second mask portion 700 cooperate to pattern the first electrode 400. The first mask portion 300 forms the first opening 310 in the first electrode 400, and the second mask portion 700 protects components within the substrate 100.

[0059] Optionally, the substrate 100 includes a driving circuit, and the orthographic projection of the second mask portion 700 on the substrate 100 at least partially overlaps with the driving circuit, so that the second mask portion 700 can improve the problem that the driving circuit is easily damaged by laser.

[0060] The embodiment of the second aspect of the present application further provides a display device, comprising the display panel of any of the first aspects described above. For the specific details of the display panel, please refer to the relevant descriptions in the above embodiments, which will not be repeated here. Since the display device of the embodiment of the present application includes the display panel of the above embodiments, the display device of the embodiment of the present application has the beneficial effects of the display panel of any of the first aspects described above, which will not be repeated here. The display device can specifically be a device with a display function, such as a mobile phone, a computer, a tablet computer, a television, an electronic paper, etc., and is not limited here.

[0061] An embodiment of the third aspect of the present application further provides a method for preparing a display panel, and the display panel may be the display panel provided by any of the embodiments of the first aspect described above.

[0062] As shown in FIG1 to FIG9 , the method for preparing a display panel includes:

[0063] Step S01 : preparing a pixel definition layer 200 on one side of a substrate 100 . The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 enclosed by the pixel defining portion 210 .

[0064] Step S02 : preparing a first mask portion 300 on a side of the pixel defining portion 210 facing away from the substrate 100 . The first mask portion 300 includes a first opening 310 arranged along a thickness direction Z of the display panel.

[0065] Step S03 : forming an organic material layer 500 on a side of the first mask portion 300 facing away from the substrate 100 .

[0066] Step S04: A first electrode material layer is provided on the side of the organic material layer 500 facing away from the substrate 100, and the first electrode material layer is patterned to form a first electrode 400 including a second opening 410, wherein the orthographic projection of the second opening 410 on the substrate 100 and the orthographic projection of the first opening 310 on the substrate 100 at least partially overlap.

[0067] In these optional embodiments, a pixel definition layer 200 can be prepared first through step S01. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220. The pixel opening 220 is used to set a light-emitting unit to achieve a light-emitting display of the display panel. Then, a first mask portion 300 is prepared on the pixel definition layer 200 through step S02. The first mask portion 300 includes a first opening 310, so that the first mask portion 300 can form a height difference at the edge facing the first opening 310. Then, after forming the organic material layer 500 on the first mask portion 300, a first electrode material layer is formed on the side of the organic material layer 500 facing away from the substrate 100. When the first electrode material layer is patterned using the first mask portion 300, due to the presence of the first opening 310, a second opening 410 can be formed on the first electrode 400, which can reduce the distribution area of ​​the first electrode 400 and improve the transmittance of the display panel. And because the first mask portion 300 is located on the side of the pixel defining portion 210 away from the substrate 100, a thickness difference can be formed at the edge of the first mask portion 300 facing the first opening 310, and the first electrode 400 is relatively weakly connected at the first opening 310 of the first mask portion 300. When the first mask portion 300 is used as a mask to perform laser patterning on the first electrode 400, the first electrode 400 is more easily disconnected at the edge of the first opening 310, which can improve the problem of the edge of the first electrode 400 facing the second opening 410 being easily warped, thereby avoiding the warped first electrode 400 affecting the yield of the subsequent packaging layer, and can improve the reliability of the display panel packaging.

[0068] Optionally, step S03 further includes patterning the organic material layer 500 to form through-holes 510, so that a portion of the first mask portion 300 is exposed through the through-holes 510. Step S04 further includes connecting at least a portion of the first electrode material layer to the first mask portion 300 via the through-holes 510. This allows the subsequently fabricated first electrode 400 to be connected to the first mask portion 300 via the through-holes 510, thereby reducing the impedance of the first electrode 400.

[0069] In some optional embodiments, as shown in FIG10 , before step S03, the following steps are further included:

[0070] Step S021 : preparing an insulating material layer on a side of the first mask portion 300 facing away from the substrate 100 .

[0071] Step S022 : patterning the insulating material layer to form support pillars and the insulating layer 800 covering the first mask portion 300 , wherein the orthographic projection of the support pillars on the substrate 100 and the orthographic projection of the first mask portion 300 on the substrate 100 are staggered.

[0072] Then in step S03 , an organic material layer 500 is prepared on the side of the support pillar and the insulating layer 800 facing away from the substrate 100 .

[0073] In these optional embodiments, before forming the organic material layer 500, support pillars and an insulating layer 800 are formed on the first mask portion 300, and the insulating layer 800 covers the first mask portion 300. When forming the organic material layer 500 in the subsequent step S03, the insulating layer 800 is present between the organic material layer 500 and the first mask portion 300, which can improve the short circuit connection between the first mask portion 300 and the organic material layer 500.

[0074] Optionally, step S03 further includes patterning the organic material layer 500 and removing the insulating layer 800 to form a through hole 510, so that a portion of the first mask portion 300 is exposed through the through hole 510. Step S04 further includes connecting at least a portion of the first electrode material layer to the first mask portion 300 via the through hole 510. The electrical connection between the first electrode 400 and the first mask portion 300 can reduce the impedance of the first electrode 400.

[0075] Optionally, a second mask portion 700 is provided on a side of the substrate 100 facing away from the pixel definition layer 200. In step S04, a laser can be emitted from the side of the first electrode 400 facing the substrate 100 toward the first electrode 400. The laser strikes the first electrode material layer through the first opening 310, thereby causing a portion of the first electrode material layer to peel off and form a second opening 410.

[0076] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. For method embodiments and display device embodiments, relevant parts can be referred to the description part of the display panel embodiment. This application is not limited to the specific steps and structures described above and shown in the figures. Those skilled in the art can make various changes, modifications and additions, or change the order of the steps after understanding the spirit of this application. In addition, for the sake of brevity, a detailed description of known method technologies is omitted here.

Claims

1. A display panel, comprising: substrate; A pixel definition layer is disposed on one side of the substrate, wherein the pixel definition layer comprises a pixel definition portion and a pixel opening formed by the pixel definition portion; A first mask portion, located at a side of the pixel defining portion away from the substrate, the first mask portion comprising a first opening penetrating along a thickness direction of the display panel; The first electrode is located on a side of the pixel definition layer facing away from the substrate and on a side of the first mask portion facing away from the substrate, the first electrode includes a second opening arranged along the thickness direction, and the orthographic projection of the second opening on the substrate at least partially overlaps with the orthographic projection of the first opening on the substrate.

2. The display panel according to claim 1, wherein: It also includes an organic material layer located on a side of the first mask portion away from the substrate, the organic material layer includes a through hole extending through the thickness direction, and the first electrode is electrically connected to the first mask portion via the through hole.

3. The display panel according to claim 2, wherein: The orthographic projection of the through hole on the substrate is located within the orthographic projection of the pixel defining portion on the substrate; and / or, the orthographic projection of the through hole on the substrate is located within the orthographic projection of the first mask portion on the substrate; And / or, an orthographic projection of the through hole on the substrate and an orthographic projection of the first opening on the substrate do not overlap.

4. The display panel according to claim 2, wherein: The plurality of through holes are distributed at intervals; And / or, at least one through hole is provided between two adjacent pixel openings along the first direction, the first opening is located at one side of the through hole in the second direction, and the first direction intersects with the second direction.

5. The display panel according to claim 2, wherein: An insulating layer is disposed between the first mask portion and the organic material layer.

6. The display panel according to claim 1, wherein: The first opening extends along a first direction, and a plurality of the first openings are distributed at intervals along a second direction, and the first direction and the second direction intersect.

7. The display panel according to claim 6, wherein: The display panel includes a first display area and a second display area arranged around at least a portion of the first display area, the light transmittance of the first display area is greater than the light transmittance of the second display area, and the first opening extends in the first display area along the first direction to a boundary between the first display area and the second display area; Alternatively, the display panel includes a display area and a non-display area surrounding at least a portion of the display area, and the first opening extends in the display area along the first direction to a boundary between the display area and the non-display area.

8. The display panel according to claim 6, wherein: The first electrode includes a first section and a second section connected to each other, the first section extends along the first direction, and a plurality of the first sections are spaced apart along the second direction, the second section is located on at least one side of the first section in the first direction and is used to connect at least two adjacent first sections.

9. The display panel according to claim 1, wherein: The thickness of the first mask portion is greater than or equal to 1000 angstroms.

10. The display panel according to claim 1, wherein: The material of the first mask portion includes a conductive material; And / or, the material of the first mask portion includes one or more of silver, indium tin oxide, molybdenum, titanium or aluminum.

11. The display panel according to claim 1, wherein: The first mask portion includes a first bottom surface facing the pixel definition layer and a first top surface facing away from the pixel definition layer, wherein an orthographic projection of the first bottom surface on the substrate is located within an orthographic projection of the first top surface on the substrate.

12. The display panel according to claim 1, wherein: In the direction approaching the substrate, the cross-sectional area of ​​the first mask portion gradually decreases; or, the first mask portion includes a first sublayer and a second sublayer located on the side of the first sublayer away from the substrate, and the orthographic projection of the first sublayer on the substrate is located within the orthographic projection of the second sublayer on the substrate.

13. The display panel according to claim 11, wherein: The orthographic projection of the second opening on the substrate is located within the orthographic projection of the first opening on the substrate, And / or, the pixel defining portion includes a second top surface facing away from the substrate, the first top surface There is a step difference between the second top surface and the second top surface.

14. The display panel according to claim 1, wherein: It also includes a second mask portion, which is arranged on a side of the substrate away from the pixel definition layer, and the orthographic projection of the first electrode on the substrate and the orthographic projection of the second mask portion on the substrate at least partially overlap.

15. The display panel according to claim 14, wherein: The substrate includes a driving circuit, and the second mask portion at least partially overlaps the driving circuit in an orthographic projection of the substrate.

16. A display device comprising the display panel according to any one of claims 1 to 15.

17. A method for preparing a display panel, comprising: A pixel definition layer is prepared on one side of the substrate, wherein the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion; Preparing a first mask portion on a side of the pixel defining portion away from the substrate, wherein the first mask portion includes a first opening arranged along a thickness direction of the display panel; preparing an organic material layer on a side of the first mask portion facing away from the substrate; A first electrode material layer is disposed on a side of the organic material layer facing away from the substrate, and the first electrode material layer is patterned to form a first electrode including a second opening, wherein an orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the first opening on the substrate.

18. The preparation method according to claim 17, wherein: The step of preparing an organic material layer on the side of the first mask portion facing away from the substrate further includes: patterning the organic material layer to form through holes, so that a portion of the first mask portion is exposed through the through holes; The step of providing a first electrode material layer on a side of the organic material layer facing away from the substrate further includes: at least a portion of the first electrode material layer is connected to the first mask portion via the through hole.

19. The preparation method according to claim 17, wherein: Before the step of preparing an organic material layer on a side of the first mask portion facing away from the substrate, the step further includes: preparing an insulating material layer on a side of the first mask portion facing away from the substrate; Performing patterning on the insulating material layer to form a support column and an insulating layer covering the first mask portion, wherein an orthographic projection of the support column on the substrate and an orthographic projection of the first mask portion on the substrate are staggered; The step of preparing an organic material layer on a side of the first mask portion facing away from the substrate further includes: preparing an organic material layer on a side of the support pillar and the insulating layer facing away from the substrate.

20. The method according to claim 19, wherein: The step of preparing an organic material layer on the side of the first mask portion facing away from the substrate further includes: patterning the organic material layer and removing the insulating layer to form a through hole, so that a portion of the first mask portion is exposed through the through hole; The step of providing a first electrode material layer on a side of the organic material layer facing away from the substrate further includes: at least a portion of the first electrode material layer is connected to the first mask portion via the through hole.

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