Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a substrate, a first electrode layer, a pixel definition layer, an isolation structure and a light-emitting layer. The first electrode layer comprises a first electrode. The pixel definition layer comprises a pixel limiting portion and a pixel opening. The pixel limiting portion comprises a first sidewall and a second sidewall facing the pixel opening. The isolation structure comprises a first isolation portion and a second isolation portion. The light-emitting layer comprises a light-emitting unit. The light-emitting unit comprises a light-emitting structure and a carrier layer. The carrier layer is in contact with the first isolation portion. The first sidewall has a first end facing a side of the first electrode. The second sidewall has a second end facing the side of the first electrode. In a direction perpendicular to the thickness of the display panel, the distance between the first end and the first isolation portion is greater than the distance between the second end and the second isolation portion. Thus, the electric leakage between the first electrode and the first isolation portion is reduced, and the use performance of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display device technology, and more particularly to a display panel and display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] In traditional display panel manufacturing, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limitations in precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding fine metal mask-less technology and are provided for reference.

[0004] However, the performance of current display products needs to be improved. Summary of the Invention

[0005] This application provides a display panel and a display device, which aim to improve the performance of the display panel.

[0006] An embodiment of the first aspect of this application provides a display panel, including: a substrate, a pixel definition layer, an isolation structure, and a light-emitting layer; the pixel definition layer is disposed on one side of the substrate, and includes a pixel defining portion and a plurality of pixel openings formed by the pixel defining portion, the pixel defining portion including a first sidewall and a second sidewall facing the same pixel opening; the isolation structure is disposed on the side of the pixel defining portion away from the substrate, and the isolation structure forms a plurality of isolation openings communicating with the pixel openings, the isolation structure including a first isolation portion and a second isolation portion, the first isolation portion being located on the side where the first sidewall is located, and the second isolation portion being located on the side where the second sidewall is located; the light-emitting layer includes light-emitting units located in each pixel opening; wherein, the first sidewall has a first end facing one side of the substrate, the second sidewall has a second end facing one side of the substrate, and along a direction perpendicular to the thickness of the display panel, the distance between the first end and the first isolation portion facing one side of the substrate is a first distance, the distance between the second end and the second isolation portion facing one side of the substrate is a second distance, and the first distance is greater than the second distance.

[0007] According to an embodiment of this application, the light-emitting unit includes a light-emitting structure and a charge carrier layer disposed on the side of the light-emitting structure near the substrate, wherein the charge carrier layer is disposed at a distance from the second isolation portion.

[0008] According to the embodiments of this application, at least a portion of the charge carrier layer is in contact with the first isolation portion; preferably, the charge carrier layer includes a hole injection layer and a hole transport layer stacked along the direction away from the substrate, the hole transport layer is in contact with the first isolation portion, and the hole transport layer is spaced apart from the second isolation portion.

[0009] According to the embodiments of this application, the charge carrier layer and the first isolation portion are spaced apart, and the distance between the end of the charge carrier layer and the end of the second isolation portion near the substrate is greater than the distance between the end of the charge carrier layer and the end of the first isolation portion near the substrate.

[0010] According to the embodiments of this application, the isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer. The third sub-layer is disposed between the first sub-layer and the pixel defining portion. The second sub-layer is disposed on the side of the first sub-layer away from the substrate. Along the direction perpendicular to the thickness of the display panel, the distance between the first end and the third sub-layer of the first isolation portion is greater than the distance between the second end and the third sub-layer of the second isolation portion.

[0011] According to embodiments of this application, at least a portion of the charge-carrying sublayer is in contact with the third sublayer of the first isolation portion.

[0012] According to the embodiments of this application, the charge carrier layer and the first isolation portion are spaced apart, and the distance between the charge carrier layer and the third sublayer of the second isolation portion is greater than the distance between the charge carrier layer and the third sublayer of the first isolation portion.

[0013] According to an embodiment of this application, the orthographic projection of the first sublayer on the substrate lies within the orthographic projection of the second sublayer on the substrate.

[0014] According to the embodiments of this application, the orthographic projection of the first sublayer on the substrate is located within the orthographic projection of the third sublayer on the substrate, and the orthographic projection of the third sublayer on the substrate is located within the orthographic projection of the second sublayer on the substrate.

[0015] According to embodiments of this application, the material of the third sublayer includes molybdenum.

[0016] According to embodiments of this application, the material of the first sublayer includes aluminum.

[0017] According to embodiments of this application, the material of the second sublayer includes titanium.

[0018] According to an embodiment of this application, the display panel further includes a first electrode layer disposed between the substrate and the pixel definition layer. The first electrode layer includes a plurality of spaced-apart first electrodes, each of which is exposed through a pixel opening. The hole transport layer and the third sub-layer of the second isolation portion are spaced apart.

[0019] According to the embodiments of this application, the light-emitting structure and the third sub-layer of the second isolation portion are spaced apart; the distance between the edge of the light-emitting structure and the third sub-layer of the second isolation portion is less than the distance between the hole transport layer and the third sub-layer of the second isolation portion.

[0020] According to the embodiments of this application, along the direction perpendicular to the thickness of the display panel, there is a third gap between the third sub-layer of the first isolation portion facing the isolation opening and the first sub-layer facing the same isolation opening, and there is a fourth gap between the third sub-layer of the second isolation portion facing the isolation opening and the first sub-layer facing the same isolation opening, and the third gap is equal to the fourth gap.

[0021] According to the embodiments of this application, the display panel further includes a first electrode layer, which is disposed on one side of the substrate and includes a plurality of spaced first electrodes. The first electrodes are disposed on the side of the light-emitting unit facing the substrate. The orthogonal projection of the isolation structure on the substrate covers the orthogonal projection edge of the first electrode on the substrate. For the same pixel opening, the first electrode includes a first edge located on the side where the first sidewall is located and a second edge located on the side where the second sidewall is located. The distance between the first edge and the first sidewall facing the isolation opening is equal to the distance between the second edge and the second sidewall facing the isolation opening. The distance between the orthogonal projection edge of the first isolation portion near the pixel opening side on the substrate and the first edge is greater than the distance between the orthogonal projection edge of the second isolation portion near the pixel opening side on the substrate and the second edge.

[0022] According to an embodiment of this application, the display panel further includes a second electrode layer, which includes a second electrode located in each isolation opening. The second electrode is disposed on the side of the light-emitting unit away from the substrate, and the second electrode is in contact with the first isolation portion.

[0023] According to the embodiments of this application, the second electrode is disposed in contact with the third sublayer of the first isolation portion, and a portion of the second electrode is located on the side of the third sublayer of the first isolation portion away from the substrate.

[0024] According to an embodiment of this application, the second electrode further extends to the side wall of the first sublayer of the first isolation portion facing the isolation opening.

[0025] According to the embodiments of this application, the second electrode is also in contact with the second isolation portion, and the contact area between the second electrode and the second isolation portion is smaller than the contact area between the second electrode and the first isolation portion.

[0026] According to an embodiment of this application, the second electrode and the third sublayer of the second isolation portion are spaced apart.

[0027] According to an embodiment of this application, the spacing between the first end and the third sublayer of the first isolation portion along the direction perpendicular to the thickness of the display panel is 6 micrometers to 11 micrometers; and / or, the spacing between the second end and the third sublayer of the second isolation portion is 1.8 micrometers to 5.5 micrometers.

[0028] According to an embodiment of this application, the first isolation portion includes a first segment, the first segment and the second isolation portion are disposed opposite to each other along a first direction, the first sidewall includes a first sub-part, the first sub-part is located on the side of the pixel opening facing the first segment, and the second sidewall is located on the side of the pixel opening facing the second isolation portion; along the direction perpendicular to the thickness of the display panel, the distance between the first end of the first sub-part and the side of the first segment facing the substrate is greater than the distance between the second end and the side of the second isolation portion facing the substrate, the hole transport layer is disposed in contact with or spaced from the first segment, and the hole transport layer is disposed spaced from the second isolation portion.

[0029] According to the embodiments of this application, the hole transport layer is disposed in contact with the third sublayer of the first segment, and the hole transport layer is disposed at a distance from the third sublayer of the second isolation portion.

[0030] According to the embodiments of this application, the first isolation portion further includes a second segment and a third segment, the second segment and the third segment being spaced apart along a second direction, the first segment, the second segment, the third segment and the second isolation portion enclosing an isolation opening, the first sidewall further includes a second sub-part and a third sub-part, the first sub-part, the second sub-part, the third sub-part and the second sidewall enclosing a pixel opening, the second sub-part being located on the side of the pixel opening facing the second segment, the third sub-part being located on the side of the pixel opening facing the third segment, the first direction and the second direction intersect; along the direction perpendicular to the thickness of the display panel, the distance between the first end of the second sub-part and the side of the second segment facing the substrate is greater than or equal to the distance between the second end and the side of the second isolation portion facing the substrate, and the hole transport layer is in contact with the second segment; and / or, the distance between the first end of the third sub-part and the side of the third segment facing the substrate is greater than or equal to the distance between the second end and the side of the second isolation portion facing the substrate, and the hole transport layer is in contact with the third segment.

[0031] According to an embodiment of this application, the hole transport layer is configured to contact the third sub-layer of the second segment.

[0032] According to an embodiment of this application, the hole transport layer is configured to contact the third sub-layer of the third segment.

[0033] An embodiment of the first aspect of this application also provides a display panel, comprising: a substrate; a first electrode layer disposed on one side of the substrate and including a plurality of spaced-apart first electrodes; a pixel defining layer disposed on one side of the substrate, the pixel defining layer including a pixel defining portion and a pixel opening formed by the pixel defining portion, each first electrode being exposed through the pixel opening, the pixel defining portion including a first sidewall and a second sidewall facing the same pixel opening; and an isolation structure disposed on the side of the pixel defining portion away from the substrate, the orthographic projection of the isolation structure on the substrate covering the edge of the orthographic projection of the first electrodes on the substrate, the isolation structure forming an isolation opening communicating with the pixel opening, the isolation structure including a first isolation portion and a second isolation portion, the first electrode being exposed through the pixel opening; and an isolation structure disposed on the side of the pixel defining portion away from the substrate, the first electrode being exposed through the pixel opening ... An isolation portion is located on the side where the first sidewall is located, and a second isolation portion is located on the side where the second sidewall is located; for the same pixel opening, the first electrode includes a first edge located on the side where the first sidewall is located and a second edge located on the side where the second sidewall is located; along the direction perpendicular to the thickness of the display panel, the edge of the first isolation portion near the pixel opening has a fifth spacing with the first edge, and the edge of the second isolation portion near the pixel opening has a sixth spacing with the second edge, the fifth spacing and the sixth spacing being the same; the first sidewall has a first end facing the first electrode, and the second sidewall has a second end facing the first electrode, the spacing between the first end and the first edge is greater than the spacing between the second end and the second edge.

[0034] According to the embodiments of this application, along the direction perpendicular to the thickness of the display panel, the distance between the first end and the side of the first isolation portion facing the substrate is the first distance, and the distance between the second end and the side of the second isolation portion facing the substrate is the second distance, and the first distance is greater than the second distance.

[0035] According to an embodiment of this application, the display panel further includes a light-emitting layer, which includes light-emitting units located in the openings of each pixel. Each light-emitting unit includes a light-emitting structure and a carrier layer disposed between the light-emitting structure and the first electrode. The carrier layer is in contact with and connected to the first isolation portion. The carrier layer is spaced apart from the second isolation portion.

[0036] According to an embodiment of this application, the carrier layer includes a hole injection layer and a hole transport layer stacked along the direction away from the substrate. The hole transport layer is in contact with the first isolation portion, and the hole transport layer is spaced apart from the second isolation portion.

[0037] An embodiment of the second aspect of this application also provides a display device, including the display panel in any of the embodiments of the first aspect described above.

[0038] In the embodiments of this application, the first sidewall has a first end facing the first electrode, and the second sidewall has a second end facing the first electrode. The light-emitting unit includes a light-emitting structure and a carrier layer disposed between the light-emitting structure and the first electrode. The carrier layer is in contact with the first isolation portion. The first electrode extends from the first end to the first isolation portion through a current transmission path between the carrier layer and the first isolation portion. Along the direction perpendicular to the thickness of the display panel, the distance between the first end and the first isolation portion facing the substrate is a first distance, and the distance between the second end and the second isolation portion facing the substrate is a second distance. The first distance is greater than the second distance, thereby making the current transmission path between the first electrode and the first isolation portion longer, thus reducing leakage current between the first electrode and the first isolation portion. The second distance between the second end and the second isolation portion facing the substrate is smaller, thereby increasing the aperture area of ​​the pixel aperture, improving the aperture ratio of the pixel aperture, improving the display effect of the display panel, and improving the performance of the display panel. Attached Figure Description

[0039] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0040] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0041] Figure 2 This is a partial structural diagram of a display panel provided in an embodiment of this application;

[0042] Figure 3 yes Figure 1 Cross-sectional view at point AA;

[0043] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0045] Figure 6 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0046] Figure 7 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0047] Figure 8 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0048] Figure 9 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0049] Figure 10 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application.

[0050] Explanation of reference numerals in the drawings: 100, substrate; 200, first electrode; 210, first edge; 220, second edge; 300, isolation structure; 301, first sublayer; 302, second sublayer; 303, third sublayer; 304, isolation opening; 310, first isolation portion; 311, first segment; 312, second segment; 313, third segment; 320, second isolation portion; 400, light-emitting unit; 401, charge carrier layer; 410, light-emitting structure ; 420, Hole transport layer; 430, Hole injection layer; 440, Electron injection layer; 450, Electron transport layer; 500, Second electrode; 600, Pixel defining portion; 610, Pixel opening; 620, First sidewall; 621, First end; 622, First sub-part; 623, Second sub-part; 624, Third sub-part; 630, Second sidewall; 631, Second end; 700, Encapsulation portion; X, First direction; Y, Second direction; Z, Thickness direction. Detailed Implementation

[0051] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] like Figures 1 to 3As shown, a display panel provided in the first aspect of this application includes: a substrate 100, a pixel definition layer, an isolation structure 300, and a light-emitting layer; the pixel definition layer is disposed on one side of the substrate 100, and includes a pixel defining portion 600 and a plurality of pixel openings 610 formed by the pixel defining portion 600; the pixel defining portion 600 includes a first sidewall 620 and a second sidewall 630 facing the same pixel opening 610; the isolation structure 300 is disposed on the side of the pixel defining portion 600 away from the substrate 100, and the isolation structure 300 forms a plurality of isolation openings 304 communicating with the pixel openings 610; the isolation structure 300 includes a first isolation portion 310 and a second isolation portion 304. 20. The first isolation portion 310 is located on the side where the first sidewall 620 is located, and the second isolation portion 320 is located on the side where the second sidewall 630 is located. The light-emitting layer includes light-emitting units 400 located in each pixel opening 610. The first sidewall 620 has a first end 621 facing the substrate 100, and the second sidewall 630 has a second end 631 facing the substrate 100. Along the direction X perpendicular to the thickness direction Z of the display panel, the distance between the first end 621 and the first isolation portion 310 facing the substrate 100 is a first distance a, and the distance between the second end 631 and the second isolation portion 320 facing the substrate 100 is a second distance b. The first distance a is greater than the second distance b.

[0055] In this embodiment, the pixel defining portion 600 of the pixel defining layer encloses and forms a pixel opening 610 to house the light-emitting unit 400, enabling the light-emitting unit 400 to emit light normally. Furthermore, the pixel defining portion 600 defines the placement area of ​​each light-emitting unit 400, reducing color crosstalk between the light-emitting units 400. An isolation structure 300 is disposed on the side of the pixel defining portion 600 facing away from the substrate 100. The isolation structure 300 encloses and forms an isolation opening 304 communicating with the pixel opening 610. When the light-emitting layer is fabricated, the fabrication material of the light-emitting layer experiences a significant drop on the side of the isolation structure 300, causing the fabrication material to break off on the side of the isolation structure 300 and fall into the isolation opening 304 to form the light-emitting unit 400 in the pixel opening 610. This eliminates the need for a precision mask, reducing the development and use of precision masks and lowering fabrication costs.

[0056] Optionally, the display panel includes a first electrode layer, which includes a plurality of first electrodes 200 spaced apart. The orthographic projection of the first electrodes 200 on the substrate 100 and the orthographic projection of the pixel opening 610 on the substrate 100 at least partially overlap. Each first electrode 200 is exposed through the pixel opening 610. At least a portion of the edge of the first electrode 200 extends into the pixel defining portion 600 on the side facing the substrate 100. The first electrodes 200 are used to drive the light-emitting unit 400. Along the thickness direction Z of the display panel, the first sidewall 620 has a first end 621 facing the substrate 100, and the second sidewall 630 has a second end 631 facing the substrate 100. The light-emitting unit 400 includes a light-emitting structure 410 and a carrier layer 401 disposed between the light-emitting structure 410 and the first electrode 200. The carrier layer 401 is in contact with the first isolation portion 310. The first electrode 200 extends from the first end 621 to the first isolation portion 310 through the current transmission path between the carrier layer 401 and the first isolation portion 310. Along the direction X perpendicular to the thickness direction Z of the display panel, the distance between the first end 621 and the first isolation portion 310 facing the substrate 100 is the first distance a, and the distance between the second end 631 and the second isolation portion 320 facing the substrate 100 is the second distance b. The first distance a is greater than the second distance b, which makes the current transmission path between the first electrode 200 and the first isolation portion 310 longer, thereby reducing leakage between the first electrode 200 and the first isolation portion 310. The second distance b between the second end 631 and the second isolation portion 320 facing the substrate 100 is smaller, which helps to increase the opening area of ​​the pixel opening 610, improve the aperture ratio of the pixel opening 610, improve the display effect of the display panel, and improve the performance of the display panel.

[0057] like Figure 2 and Figure 3 As shown, in some optional embodiments, the light-emitting unit 400 includes a light-emitting structure 410 and a carrier layer 401 disposed between the light-emitting structure 410 and the first electrode 200, with the carrier layer 401 and the second isolation portion 320 being spaced apart.

[0058] In these alternative embodiments, in order to increase the opening area of ​​the pixel opening 610, the second distance b between the second end 631 and the second isolation portion 320 facing the substrate 100 is smaller, and the carrier layer 401 and the second isolation portion 320 are spaced apart, thereby reducing the risk of the first electrode 200 leaking current to the second isolation portion 320 through the carrier layer 401.

[0059] Optional, such as Figure 3As shown, at least a portion of the carrier layer 401 is in contact with the first isolation portion 310, and the first spacing a is greater than the second spacing b, thereby making the current transmission path between the first electrode 200 and the first isolation portion 310 longer, thereby reducing leakage current generated between the first electrode 200 and the carrier layer 401 and the first isolation portion 310.

[0060] like Figure 4 and Figure 5 As shown, in some optional embodiments, the carrier layer 401 includes a hole injection layer 430 and a hole transport layer 420 stacked along the direction away from the substrate 100. The hole transport layer 420 is in contact with the first isolation portion 310, and the hole transport layer 420 and the second isolation portion 320 are spaced apart.

[0061] In these optional embodiments, the current in the first electrode 200 is transmitted to the hole transport layer 420 through the hole injection layer 430. The hole transport layer 420 is in contact with the first isolation portion 310, and the current transmission path between the first electrode 200 and the first isolation portion 310 extends from the first end 621 to the first isolation portion 310. The longer current transmission path between the first electrode 200 and the first isolation portion 310 reduces leakage current between them. The smaller second distance b between the second end 631 and the second isolation portion 320 facing the substrate 100, and the spaced-apart arrangement of the hole transport layer 420 and the second isolation portion 320, reduces the risk of leakage current from the first electrode 200 to the second isolation portion 320 through the hole transport layer 420.

[0062] Optionally, the hole injection layer 430 is in contact with the first isolation portion 310, and the hole injection layer 430 and the second isolation portion 320 are spaced apart.

[0063] like Figure 6 As shown, in some optional embodiments, the charge carrier layer 401 and the first isolation portion 310 are spaced apart, and the distance between the ends of the charge carrier layer 401 and the second isolation portion 320 near the substrate 100 is greater than the distance between the ends of the charge carrier layer 401 and the first isolation portion 310 near the substrate 100.

[0064] In these optional embodiments, the carrier layer 401 is spaced apart from the first isolation portion 310, and the carrier layer 401 is spaced apart from the second isolation portion 320. Since the first spacing a is greater than the second spacing b, the risk of leakage from the first electrode 200 to the second isolation portion 320 through the carrier layer 401 is relatively high. The spacing between the ends of the carrier layer 401 and the second isolation portion 320 near the substrate 100 is greater than the spacing between the ends of the carrier layer 401 and the first isolation portion 310 near the substrate 100, so as to reduce the risk of leakage of the display panel.

[0065] like Figure 5 As shown, in some optional embodiments, the isolation structure 300 includes a first sub-layer 301, a second sub-layer 302, and a third sub-layer 303. The third sub-layer 303 is disposed between the first sub-layer 301 and the pixel limiting portion 600. The second sub-layer 302 is disposed on the side of the first sub-layer 301 facing away from the substrate 100, along the direction X perpendicular to the thickness direction Z of the display panel. The distance between the first end 621 and the third sub-layer 303 of the first isolation portion 310 is greater than the distance between the second end 631 and the third sub-layer 303 of the second isolation portion 320.

[0066] In these optional embodiments, the isolation structure 300 includes a third sublayer 303, a first sublayer 301, and a second sublayer 302 stacked in a direction away from the substrate 100. When the first sublayer 301 is side-etched, the third sublayer 303 can provide protection to the film layer on the substrate 100 side. The third sublayer 303 of the isolation structure 300 facing the substrate 100 is used to contact the hole transport layer 420. The distance between the first end 621 and the third sublayer 303 of the first isolation portion 310 is greater than the distance between the second end 631 and the third sublayer 303 of the second isolation portion 320, thereby making the current transmission path between the first electrode 200 and the third sublayer 303 of the first isolation portion 310 longer, thereby reducing leakage current between the first electrode 200 and the third sublayer 303 of the first isolation portion 310.

[0067] In some optional embodiments, the charge-carrying sublayer 401 is in contact with the third sublayer 303 of the first isolation portion 310. Optionally, such as... Figure 5 As shown, the hole transport layer 420 of the charge carrier layer 401 is in contact with the third sublayer 303 of the first isolation section 310. The hole transport layer 420 and the third sublayer 303 of the second isolation section 320 are provided with insulation between them.

[0068] like Figure 6 As shown, in some alternative embodiments, the current carrier layer 401 is spaced apart from the first isolation portion 310, and the distance between the current carrier layer 401 and the third sub-layer 303 of the second isolation portion 320 is greater than the distance between the current carrier layer 401 and the third sub-layer 303 of the first isolation portion 310.

[0069] In these optional embodiments, the current carrier layer 401 is spaced apart from the third sublayer 303 of the first isolation portion 310, and the current carrier layer 401 is spaced apart from the third sublayer 303 of the second isolation portion 320. Since the first spacing a is greater than the second spacing b, the risk of leakage from the first electrode 200 to the third sublayer 303 of the second isolation portion 320 through the current carrier layer 401 is relatively high. Therefore, the spacing between the current carrier layer 401 and the third sublayer 303 of the second isolation portion 320 is set to be greater than the spacing between the current carrier layer 401 and the third sublayer 303 of the first isolation portion 310 to improve the leakage problem of the display panel. Optionally, such as... Figure 5 As shown, the orthographic projection of the first sublayer 301 on the substrate 100 lies within the orthographic projection of the second sublayer 302 on the substrate 100. The orthographic projection area of ​​the side of the first sublayer 301 facing away from the substrate 100 on the substrate 100 is smaller than the orthographic projection area of ​​the second sublayer 302 on the substrate 100. The second sublayer 302 covers the surface of the first sublayer 301 closest to the second sublayer 302. At this time, the first sublayer 301 is recessed relative to the second sublayer 302 in a direction away from the isolation opening 304. During the fabrication process of the light-emitting layer, the fabrication material of the light-emitting layer has a large drop at the edge of the isolation structure 300, and the first sublayer 301 is recessed relative to the second sublayer 302. The fabrication material of the light-emitting layer is difficult to connect at the edge of the isolation structure 300, resulting in breakage. The breakage of the fabrication material of the light-emitting layer forms mutually disconnected light-emitting units 400.

[0070] Optional, such as Figure 5 As shown, the orthographic projection of the first sublayer 301 on the substrate 100 is located within the orthographic projection of the third sublayer 303 on the substrate 100. The orthographic projection area of ​​the first sublayer 301 on the substrate 100 is smaller than the orthographic projection area of ​​the third sublayer 303 on the substrate 100, thereby improving the protective effect of the third sublayer 303 on the side film layer of the substrate 100.

[0071] Optional, such as Figure 5 As shown, the orthographic projection of the third sublayer 303 on the substrate 100 lies within the orthographic projection of the second sublayer 302 on the substrate 100. The orthographic projection area of ​​the third sublayer 303 on the substrate 100 is smaller than the orthographic projection area of ​​the second sublayer 302 on the substrate 100, thereby reducing the risk of leakage from the first electrode 200 to the third sublayer 303 through the current-carrying sublayer 401.

[0072] Optional, such as Figure 2 and Figure 5 As shown, the hole transport layer 420 and the third sub-layer 303 of the second isolation section 320 are spaced apart to reduce the risk of leakage from the first electrode 200 to the third sub-layer 303 of the second isolation section 320 through the hole transport layer 420.

[0073] Optional, such as Figure 6As shown, the light-emitting structure 410 and the third sub-layer 303 of the second isolation portion 320 are spaced apart. The distance between the edges of the light-emitting structure 410 and the third sub-layer 303 of the second isolation portion 320 is smaller than the distance between the hole transport layer 420 and the third sub-layer 303 of the second isolation portion 320. The portion of the light-emitting structure 410 near the second isolation portion 320 covers the portion of the hole transport layer 420 near the second isolation portion 320. The light-emitting structure 410 is located between the hole transport layer 420 and the third sub-layer 303 of the second isolation portion 320, thereby reducing the risk of leakage from the hole transport layer 420 to the third sub-layer 303 of the second isolation portion 320.

[0074] like Figure 5 As shown, in some optional embodiments, along the direction X perpendicular to the thickness direction Z of the display panel, there is a third gap between the third sub-layer 303 of the first isolation portion 310 facing the isolation opening 304 and the first sub-layer 301 facing the same isolation opening 304, and there is a fourth gap between the third sub-layer 303 of the second isolation portion 320 facing the isolation opening 304 and the first sub-layer 301 facing the same isolation opening 304, and the third gap is equal to the fourth gap.

[0075] In these optional embodiments, along the direction X perpendicular to the thickness direction Z of the display panel, there is a third spacing between the third sub-layer 303 of the first isolation portion 310 facing the isolation opening 304 and the first sub-layer 301 facing the same isolation opening 304. That is, the first sub-layer 301 protrudes relative to the third sub-layer 303 in the direction facing the isolation opening 304, and the protrusion distance is the third spacing. There is a fourth spacing between the third sub-layer 303 of the second isolation portion 320 facing the isolation opening 304 and the first sub-layer 301 facing the same isolation opening 304. That is, the first sub-layer 301 protrudes relative to the third sub-layer 303 in the direction facing the isolation opening 304, and the protrusion distance is the fourth spacing. The third spacing and the fourth spacing are equal, thereby allowing the first isolation portion 310 and the second isolation portion 320 to have the same manufacturing process, thus simplifying the manufacturing process of the isolation structure 300.

[0076] like Figure 7As shown, in some optional embodiments, the first electrode 200 is disposed on the side of the light-emitting unit 400 facing the substrate 100, and the orthographic projection of the isolation structure 300 on the substrate 100 covers the orthographic projection edge of the first electrode 200 on the substrate 100; for the same pixel opening 610, the first electrode 200 includes a first edge 210 located on the side where the first sidewall 620 is located and a second edge 220 located on the side where the second sidewall 630 is located; the distance L between the first edge 210 and the first sidewall 620 facing the isolation opening 304 is equal to the distance K between the second edge 220 and the second sidewall 630 facing the isolation opening 304; the distance between the orthographic projection edge of the first isolation portion 310 on the substrate 100 near the pixel opening 610 and the first edge 210 is greater than the distance between the orthographic projection edge of the second isolation portion 320 on the substrate 100 near the pixel opening 610 and the second edge 220.

[0077] In these optional embodiments, the first edge 210 of the first electrode 200 extends to the side of the first isolation portion 310 facing the substrate 100, and the second edge 220 of the first electrode 200 extends to the side of the second isolation portion 320 facing the substrate 100. The first sidewall 620 and the second sidewall 630 enclose to form a pixel opening 610. The distance L between the first edge 210 and the first sidewall 620 facing the isolation opening 304, and the distance K between the second edge 220 and the second sidewall 630 facing the isolation opening 304, are L = K. The pixel opening 610 is directly opposite the first electrode 200, and the side of the first isolation portion 310 near the pixel opening 610 is directly projected onto the substrate 100. The distance between the shadow edge and the first edge 210 is greater than the distance between the orthographic projection edge of the second isolation portion 320 on the substrate 100 near the pixel opening 610 and the second edge 220. By adjusting the positional relationship between the first isolation portion 310 and the second isolation portion 320 and the pixel opening 610, the distance between the first isolation portion 310 near the pixel opening 610 and the pixel opening 610 is closer, and the distance between the second isolation portion 320 near the pixel opening 610 and the second sidewall 630 is greater than the distance between the first isolation portion 310 near the pixel opening 610 and the first sidewall 620, so as to reduce the risk of leakage from the first electrode 200 to the second isolation portion 320.

[0078] like Figure 5 As shown, in some optional embodiments, the display panel further includes a second electrode layer, which includes a second electrode 500 located in each isolation opening 304. The second electrode 500 is disposed on the side of the light-emitting unit 400 away from the substrate 100, and the second electrode 500 is in contact with the first isolation portion 310.

[0079] In these optional embodiments, the second electrode 500 is disposed on the side of the light-emitting unit 400 away from the substrate 100 for driving the light-emitting unit 400. The second electrode 500 is disposed in contact with the first isolation portion 310, and the isolation structure 300 separates the second electrode layer to form mutually spaced second electrodes 500. The mutually spaced second electrodes 500 are electrically connected through the isolation structure 300 to form a full-surface electrode, ensuring the normal light emission of the light-emitting unit 400.

[0080] Optionally, the material of the first sublayer 301 may include aluminum.

[0081] Optionally, the material of the second sublayer 302 includes titanium.

[0082] Optional, such as Figure 5 As shown, the second electrode 500 is in contact with the third sub-layer 303 of the first isolation portion 310. The material of the third sub-layer 303 may include molybdenum, which helps to reduce the resistivity of the third sub-layer 303 and reduce power consumption. A portion of the second electrode 500 is located on the side of the third sub-layer 303 of the first isolation portion 310 facing away from the substrate 100. The second electrode 500 covers at least a portion of the side of the third sub-layer 303 facing away from the substrate 100 to increase the contact area between the second electrode 500 and the third sub-layer 303.

[0083] Optional, such as Figure 5 As shown, the second electrode 500 also extends to the side wall of the first sub-layer 301 of the first isolation portion 310 facing the isolation opening 304, thereby further increasing the contact area between the second electrode 500 and the first isolation portion 310.

[0084] Optional, such as Figure 8 As shown, the second electrode 500 is also in contact with the second isolation portion 320, and the contact area between the second electrode 500 and the second isolation portion 320 is smaller than the contact area between the second electrode 500 and the first isolation portion 310. The vapor deposition opening of the vapor deposition apparatus is tilted toward the first isolation portion 310, thereby increasing the distance between the carrier layer 401 and the second isolation portion 320. When the second electrode 500 is formed by vapor deposition, since the vapor deposition opening is tilted toward the first isolation portion 310, the contact area between the second electrode 500 and the second isolation portion 320 is smaller than the contact area between the second electrode 500 and the first isolation portion 310. In addition, it can also reduce the leakage of the first electrode 200 to the second electrode 500 through the carrier layer 401 and the second isolation portion 320.

[0085] Optional, such as Figure 2 and Figure 5 As shown, the evaporation source reciprocates relative to the substrate 100 with the isolation structure 300 along the scanning direction for evaporating the light-emitting layer and the second electrode layer. The first isolation portion 310 and the second isolation portion 320 are arranged opposite to each other along the scanning direction.

[0086] Optional, such as Figure 2 and Figure 5 As shown, the second electrode 500 and the third sub-layer 303 of the second isolation portion 320 are spaced apart. During the deposition process of the second electrode 500 and the hole transport layer 420, the materials used to prepare the second electrode 500 and the hole transport layer 420 do not extend to the third sub-layer 303 of the second isolation portion 320, thereby making the second electrode 500 and the third sub-layer 303 of the second isolation portion 320 spaced apart.

[0087] Optional, such as Figure 5 As shown, along the direction X perpendicular to the thickness of the display panel, the spacing 'a' between the first end 621 and the third sub-layer 303 of the first isolation portion 310 is 6 micrometers to 11 micrometers. This results in a longer current transmission path between the first electrode 200 and the third sub-layer 303 of the first isolation portion 310, reducing the risk of leakage. The spacing 'a' between the first end 621 and the third sub-layer 303 of the first isolation portion 310 can be 6 micrometers, 6.5 micrometers, 7 micrometers, 7.5 micrometers, 8 micrometers, 8.5 micrometers, 9 micrometers, 9.5 micrometers, 10 micrometers, 10.5 micrometers, 11 micrometers, etc.

[0088] Optional, such as Figure 5 As shown, along the direction X perpendicular to the thickness direction Z of the display panel, the distance b between the second end 631 and the third sub-layer 303 of the second isolation portion 320 is 1.8 micrometers to 5.5 micrometers. Setting the distance b between the second end 631 and the third sub-layer 303 of the second isolation portion 320 to be small is beneficial for increasing the area of ​​the pixel opening 610. The distance b between the second end 631 and the third sub-layer 303 of the second isolation portion 320 can be 1.8 micrometers, 8 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, 5 micrometers, 5.5 micrometers, etc.

[0089] like Figure 2 and Figure 5As shown, in some optional embodiments, the first isolation portion 310 and the second isolation portion 320 form an isolation structure surrounding the same light-emitting unit 400. The first isolation portion 310 includes a first segment 311, and the first segment 311 and the second isolation portion 320 are disposed opposite to each other along a first direction X. The first sidewall 620 includes a first sub-part 622, which is located on the side of the pixel opening 610 facing the first segment 311, and the second sidewall 630 is located on the side of the pixel opening 610 facing the second isolation portion 320. Along the direction X perpendicular to the thickness direction of the display panel, the distance between the first end 621 of the first sub-part 622 and the side of the first segment 311 facing the substrate 100 is greater than the distance between the second end 631 and the side of the second isolation portion 320 facing the substrate 100. The hole transport layer 420 is disposed in contact with the first segment 311, and the hole transport layer 420 is disposed spaced apart from the second isolation portion 320.

[0090] In these optional embodiments, the first segment 311 and the second isolation portion 320 are disposed opposite to each other along a first direction X, which is parallel to the scanning direction. The distance between the first end 621 of the first sub-part 622 and the side of the first segment 311 facing the substrate 100 is greater than the distance between the second end 631 and the side of the second isolation portion 320 facing the substrate 100. The hole transport layer 420 is disposed in contact with the first segment 311 and is disposed spaced apart from the second isolation portion 320, thereby reducing the risk of leakage from the first electrode 200 to the first segment 311 and the second isolation portion 320 through the hole transport layer 420.

[0091] like Figure 6 As shown, in some alternative embodiments, the hole transport layer 420 is spaced apart from the first segment 311, and the hole transport layer 420 is spaced apart from the second isolation portion 320. The distance between the hole transport layer 420 and the first segment 311 is smaller than the distance between the hole transport layer 420 and the second isolation portion 320, thereby reducing the risk of the first electrode 200 leaking current to the first segment 311 and the second isolation portion 320 through the hole transport layer 420.

[0092] Optional, such as Figure 2 and Figure 5 As shown, the hole transport layer 420 is in contact with the third sub-layer 303 of the first segment 311, and the hole transport layer 420 is spaced apart from the third sub-layer 303 of the second isolation portion 320. Optionally, the second electrode 500 is in contact with the third sub-layer 303 of the first segment 311, and the second electrode 500 is spaced apart from the third sub-layer 303 of the second isolation portion 320.

[0093] like Figure 2 and Figure 9As shown, in some optional embodiments, the first isolation portion 310 further includes a second segment 312 and a third segment 313, which are spaced apart along the second direction Y. The first segment 311, the second segment 312, the third segment 313, and the second isolation portion 320 enclose an isolation opening 304. The first sidewall 620 further includes a second sub-part 622 and a third sub-part 624, which enclose a pixel opening 610. The second sub-part 623 is located on the side of the pixel opening 610 facing the second segment 312, and the third sub-part 624 is located on the side of the pixel opening 610 facing the third segment 312. On one side of 3, the first direction X and the second direction Y intersect; along the direction Y perpendicular to the thickness direction Z of the display panel, the distance d between the first end 621 of the second sub-part 623 and the side of the second segment 312 facing the substrate 100 is greater than or equal to the distance b between the second end 631 and the side of the second isolation portion 320 facing the substrate 100, and the hole transport layer 420 is in contact with the second segment 312; and / or, the distance c between the first end 621 of the third sub-part 624 and the side of the third segment 313 facing the substrate 100 is greater than or equal to the distance b between the second end 631 and the side of the second isolation portion 320 facing the substrate 100, and the hole transport layer 420 is in contact with the third segment 313.

[0094] In these optional embodiments, the first segment 311, the second segment 312, the third segment 313, and the second isolation portion 320 enclose an isolation opening 304. The second segment 312 is connected between the first segment 311 and the second isolation portion 320, and the third segment 313 is connected between the first segment 311 and the second isolation portion 320. The first sub-part 622, the second sub-part 623, the third sub-part 624, and the second sidewall 630 enclose a pixel opening 610. The second sub-part 623 is connected between the first sub-part 622 and the second sidewall 630, and the third sub-part 624 is connected between the first sub-part 622 and the second sidewall 630.

[0095] Optional, such as Figure 5 and Figure 9 As shown, along the direction perpendicular to the thickness direction Z of the display panel, the distance d between the first end 621 of the second sub-part 623 and the side of the second segment 312 facing the substrate 100 is greater than or equal to the distance b between the second end 631 and the side of the second isolation part 320 facing the substrate 100. The hole transport layer 420 is in contact with the second segment 312, thereby reducing the risk of the first electrode 200 leaking current to the second segment 312 through the hole transport layer 420.

[0096] Optional, such as Figure 5 and Figure 9As shown, along the direction perpendicular to the thickness direction Z of the display panel, the distance c between the first end 621 of the third sub-part 624 and the side of the third segment 313 facing the substrate 100 is greater than or equal to the distance b between the second end 631 and the side of the second isolation part 320 facing the substrate 100. The hole transport layer 420 is in contact with the third segment 313, thereby reducing the risk of the first electrode 200 leaking current to the third segment 313 through the hole transport layer 420.

[0097] Optional, such as Figure 9 As shown, the hole transport layer 420 is in contact with the third sublayer 303 of the second segment 312.

[0098] Optional, such as Figure 5 and Figure 9 As shown, the distance d between the first end 621 of the second sub-part 623 and the side of the second segment 312 facing the substrate 100 is greater than the distance a between the first end 621 of the first sub-part 622 and the side of the first segment 311 facing the substrate 100, so as to reduce the risk of leakage from the first electrode 200 to the second segment 312.

[0099] Optional, such as Figure 9 As shown, the hole transport layer 420 is in contact with the third sublayer 303 of the third segment 313.

[0100] Optional, such as Figure 9 As shown, the distance c between the first end 621 of the third sub-part 624 and the side of the third segment 313 facing the substrate 100 is greater than the distance a between the first end 621 of the first sub-part 622 and the side of the first segment 311 facing the substrate 100, so as to reduce the risk of leakage from the first electrode 200 to the third segment 313.

[0101] Optionally, the first direction X and the second direction Y are perpendicular.

[0102] Optionally, the second direction Y is perpendicular to the scanning direction, and in the evaporation process of the light-emitting layer and the second electrode layer, multiple evaporation sources are spaced apart along the second direction Y.

[0103] Optional, such as Figure 5 As shown, the display panel also includes a packaging section 700. The packaging section 700 is disposed within each isolation opening 304 and located on the side of the second electrode 500 away from the substrate 100. The packaging section 700 is used to package the light-emitting unit 400, reducing the intrusion of water, oxygen, etc. into the light-emitting unit 400. The packaging section 700 extends from within the isolation opening 304 to the side of the isolation structure 300 away from the substrate 100, thereby increasing the packaging area of ​​the packaging section and improving the packaging effect.

[0104] Optional, such as Figure 4As shown, the light-emitting unit 400 may include a hole injection layer 430 (HIL), a hole transport layer 420 (HTL), a light-emitting structure 410, an electron injection layer 440 (EIL), and an electron transport layer 450 (ETL) arranged sequentially along the direction away from the substrate 100.

[0105] like Figure 10 As shown, a display panel provided in the first aspect of this application includes: a substrate 100, a first electrode layer, a pixel definition layer, an isolation structure 300, and a light-emitting layer. The first electrode layer is disposed on one side of the substrate 100 and includes a plurality of spaced-apart first electrodes 200. The pixel definition layer is disposed on one side of the substrate 100 and includes a pixel defining portion 600 and a pixel opening 610 formed by the pixel defining portion 600. Each first electrode 200 is exposed through the pixel opening 610. The pixel defining portion 600 includes a first sidewall 620 and a second sidewall 630 facing the same pixel opening 610. The isolation structure 300 is disposed on the side of the pixel defining portion 600 away from the substrate 100. The orthographic projection of the isolation structure 300 on the substrate 100 covers the edge of the orthographic projection of the first electrode 200 on the substrate 100. The isolation structure 300 forms an isolation opening communicating with the pixel opening 610. The isolation structure 300 includes a first isolation portion 310 and a second isolation portion 320. The first isolation portion 310 is located on the side where the first sidewall 620 is located, and the second isolation portion 320 is located on the side where the second sidewall 630 is located. Along the direction perpendicular to the thickness of the display panel, the edge of the first isolation portion 310 near the pixel opening 610 has a fifth spacing N with the first edge 210, and the edge of the second isolation portion 320 near the pixel opening 610 has a sixth spacing M with the second edge 220. The fifth spacing N and the sixth spacing M are the same. The first sidewall 620 has a first end 621 facing the first electrode 200, and the second sidewall 630 has a second end 631 facing the first electrode 200. Along the direction perpendicular to the thickness of the display panel, the spacing between the first end 621 and the first edge 210 is greater than the spacing between the second end 631 and the second edge 220.

[0106] In this embodiment, the orthographic projection of the isolation structure 300 onto the substrate 100 covers the orthographic projection edge of the first electrode 200 onto the substrate 100. The first edge 210 of the first electrode 200 extends to the side of the first isolation portion 310 facing the substrate 100, and the second edge 220 of the first electrode 200 extends to the side of the second isolation portion 320 facing the substrate 100. A fifth distance N exists between the edge of the first isolation portion 310 near the pixel opening 610 and the first edge 210. A fifth distance N exists between the edge of the second isolation portion 320 near the pixel opening 610 and the second edge 220. The sixth pitch M is the same as the fifth pitch N. The isolation opening 304 formed by the first isolation portion 310 and the second isolation portion 320 is directly opposite the first electrode 200. The distance between the first end 621 and the first edge 210 is greater than the distance between the second end 631 and the second edge 220. That is, the distance between the first end 621 and the first isolation portion 310 is greater than the distance between the second end 631 and the second isolation portion 320. By increasing the distance between the first end 621 and the first isolation portion 310, leakage current between the first electrode 200 and the first isolation portion 310 is reduced. The second pitch b between the second end 631 and the second isolation portion 320 on the side facing the substrate 100 is smaller, which helps to increase the opening area of ​​the pixel opening 610, improve the aperture ratio of the pixel opening 610, improve the display effect of the display panel, and improve the performance of the display panel.

[0107] Optionally, the distance between the first end 621 and the first isolation portion 310 facing the substrate 100 is a first distance a, and the distance between the second end 631 and the second isolation portion 320 facing the substrate 100 is a second distance b. The first distance a is greater than the second distance b, so as to reduce leakage between the first electrode 200 and the first isolation portion 310.

[0108] In some optional embodiments, the arrangement and beneficial effects of the first electrode 200, the isolation structure 300, the carrier layer 401, and the second electrode 500 are as shown above, and will not be repeated here.

[0109] The second aspect of this application also provides a display device, including the display panel of any of the first aspect embodiments described above. Since the display device provided in the second aspect of this application includes the display panel of any of the first aspect embodiments described above, it has the beneficial effects of the display panel of any of the first aspect embodiments described above, which will not be elaborated further here.

[0110] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0111] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A pixel definition layer is disposed on one side of the substrate. The pixel definition layer includes a pixel defining portion and a plurality of pixel openings formed by the pixel defining portion. The pixel defining portion includes a first sidewall and a second sidewall facing the same pixel opening. An isolation structure is disposed on the side of the pixel defining portion away from the substrate. The isolation structure encloses and forms a plurality of isolation openings that communicate with the pixel opening. The isolation structure includes a first isolation portion and a second isolation portion. The first isolation portion is located on the side where the first sidewall is located, and the second isolation portion is located on the side where the second sidewall is located. The light-emitting layer includes light-emitting units located in each of the pixel openings; The first sidewall has a first end facing the substrate, and the second sidewall has a second end facing the substrate. Along a direction perpendicular to the thickness of the display panel, the distance between the first end and the first isolation portion facing the substrate is a first distance, and the distance between the second end and the second isolation portion facing the substrate is a second distance. The first distance is greater than the second distance.

2. The display panel according to claim 1, characterized in that, The light-emitting unit includes a light-emitting structure and a charge carrier layer disposed on the side of the light-emitting structure near the substrate, wherein the charge carrier layer is disposed at a distance from the second isolation portion; Preferably, at least a portion of the charge carrier layer is in contact with the first isolation portion; preferably, the charge carrier layer includes a hole injection layer and a hole transport layer stacked along a direction away from the substrate, the hole transport layer is in contact with the first isolation portion, and the hole transport layer is spaced apart from the second isolation portion; Preferably, the charge carrier layer is spaced apart from the first isolation portion, and the distance between the end of the charge carrier layer and the end of the second isolation portion near the substrate is greater than the distance between the end of the charge carrier layer and the end of the first isolation portion near the substrate.

3. The display panel according to claim 2, characterized in that, The isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer. The third sub-layer is disposed between the first sub-layer and the pixel defining portion. The second sub-layer is disposed on the side of the first sub-layer away from the substrate. Along the direction perpendicular to the thickness of the display panel, the distance between the first end and the third sub-layer of the first isolation portion is greater than the distance between the second end and the third sub-layer of the second isolation portion. Preferably, at least a portion of the current-carrying sublayer is in contact with the third sublayer of the first isolation portion; Preferably, the current-carrying sublayer is spaced apart from the first isolation portion, and the distance between the current-carrying sublayer and the third sublayer of the second isolation portion is greater than the distance between the current-carrying sublayer and the third sublayer of the first isolation portion; Preferably, the orthographic projection of the first sublayer on the substrate lies within the orthographic projection of the second sublayer on the substrate; Preferably, the orthographic projection of the first sublayer on the substrate is located within the orthographic projection of the third sublayer on the substrate, and the orthographic projection of the third sublayer on the substrate is located within the orthographic projection of the second sublayer on the substrate; Preferably, the material of the third sublayer includes molybdenum; Preferably, the material of the first sublayer includes aluminum; Preferably, the material of the second sublayer includes titanium.

4. The display panel according to claim 3, characterized in that, The display panel further includes a first electrode layer disposed between the substrate and the pixel definition layer. The first electrode layer includes a plurality of spaced first electrodes, each of which is exposed through the pixel opening. The hole transport layer is spaced apart from the third sub-layer of the second isolation portion. Preferably, the light-emitting structure is spaced apart from the third sub-layer of the second insulating portion; The distance between the light-emitting structure and the edge of the third sub-layer of the second isolation part is less than the distance between the hole transport layer and the third sub-layer of the second isolation part.

5. The display panel according to claim 3, characterized in that, Along a direction perpendicular to the thickness of the display panel, there is a third spacing between the third sub-layer of the first isolation portion facing the isolation opening and the first sub-layer facing the same isolation opening, and there is a fourth spacing between the third sub-layer of the second isolation portion facing the isolation opening and the first sub-layer facing the same isolation opening, wherein the third spacing is equal to the fourth spacing.

6. The display panel according to claim 3, characterized in that, The display panel further includes a first electrode layer, which is disposed on one side of the substrate and includes a plurality of spaced first electrodes. The first electrodes are disposed on the side of the light-emitting unit facing the substrate, and the orthographic projection of the isolation structure on the substrate covers the edge of the orthographic projection of the first electrodes on the substrate. For the same pixel opening, the first electrode includes a first edge located on the side where the first sidewall is located and a second edge located on the side where the second sidewall is located; The distance between the first edge and the first sidewall facing the isolation opening is equal to the distance between the second edge and the second sidewall facing the isolation opening. The distance between the orthographic projection edge of the first isolation portion near the pixel opening side on the substrate and the first edge is greater than the distance between the orthographic projection edge of the second isolation portion near the pixel opening side on the substrate and the second edge.

7. The display panel according to claim 3, characterized in that, The display panel further includes a second electrode layer, which includes a second electrode located in each of the isolation openings. The second electrode is disposed on the side of the light-emitting unit away from the substrate and is in contact with the first isolation portion. Preferably, the second electrode is disposed in contact with the third sublayer of the first isolation portion, and a portion of the second electrode is located on the side of the third sublayer of the first isolation portion away from the substrate; Preferably, the second electrode further extends to the side wall of the first sub-layer of the first isolation portion facing the isolation opening; Preferably, the second electrode is also in contact with the second isolation portion, and the contact area between the second electrode and the second isolation portion is smaller than the contact area between the second electrode and the first isolation portion; Preferably, the second electrode and the third sublayer of the second isolation portion are spaced apart.

8. The display panel according to claim 3, characterized in that, Along a direction perpendicular to the thickness of the display panel, the spacing between the first end and the third sublayer of the first isolation portion is 6 micrometers to 11 micrometers; and / or, the spacing between the second end and the third sublayer of the second isolation portion is 1.8 micrometers to 5.5 micrometers.

9. The display panel according to claim 3, characterized in that, The first isolation portion includes a first segment, the first segment and the second isolation portion are disposed opposite to each other along a first direction, the first sidewall includes a first sub-part, the first sub-part is located on the side of the pixel opening facing the first segment, and the second sidewall is located on the side of the pixel opening facing the second isolation portion; Along a direction perpendicular to the thickness of the display panel, the distance between the first end of the first sub-part and the side of the first segment facing the substrate is greater than the distance between the second end and the side of the second isolation part facing the substrate. The hole transport layer is either in contact with or spaced from the first segment, and the hole transport layer is spaced from the second isolation part. Preferably, the hole transport layer is disposed in contact with the third sub-layer of the first segment, and the hole transport layer is disposed at an interval from the third sub-layer of the second isolation portion.

10. The display panel according to claim 9, characterized in that, The first isolation portion further includes a second segment and a third segment, which are spaced apart along a second direction. The first segment, the second segment, the third segment, and the second isolation portion together form the isolation opening. The first sidewall further includes a second sub-part and a third sub-part, which are spaced together with the second sidewall to form the pixel opening. The second sub-part is located on the side of the pixel opening facing the second segment, and the third sub-part is located on the side of the pixel opening facing the third segment. The first direction and the second direction intersect. Along a direction perpendicular to the thickness of the display panel, the distance between the first end of the second sub-part and the side of the second segment facing the substrate is greater than or equal to the distance between the second end and the side of the second isolation portion facing the substrate, and the hole transport layer is in contact with the second segment; and / or, the distance between the first end of the third sub-part and the side of the third segment facing the substrate is greater than or equal to the distance between the second end and the side of the second isolation portion facing the substrate, and the hole transport layer is in contact with the third segment.

11. The display panel according to claim 10, characterized in that, The hole transport layer is configured to contact the third sub-layer of the second segment.

12. The display panel according to claim 10, characterized in that, The hole transport layer is configured to contact the third sub-layer of the third segment.

13. A display panel, characterized in that, include: substrate; A first electrode layer is disposed on one side of the substrate and includes a plurality of spaced-apart first electrodes. A pixel definition layer is disposed on one side of the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. Each first electrode is exposed through the pixel opening. The pixel defining portion includes a first sidewall and a second sidewall facing the same pixel opening. An isolation structure is disposed on the side of the pixel defining portion away from the substrate. The orthographic projection of the isolation structure on the substrate covers the orthographic projection edge of the first electrode on the substrate. The isolation structure encloses and forms an isolation opening communicating with the pixel opening. The isolation structure includes a first isolation portion and a second isolation portion. The first isolation portion is located on the side where the first sidewall is located, and the second isolation portion is located on the side where the second sidewall is located. For the same pixel opening, the first electrode includes a first edge located on the side where the first sidewall is located and a second edge located on the side where the second sidewall is located. Along a direction perpendicular to the thickness of the display panel, the first isolation portion has a fifth spacing between its edge near the pixel opening and the first edge, and the second isolation portion has a sixth spacing between its edge near the pixel opening and the second edge, wherein the fifth spacing and the sixth spacing are the same; The first sidewall has a first end facing the first electrode, and the second sidewall has a second end facing the first electrode. The distance between the first end and the first edge is greater than the distance between the second end and the second edge.

14. The display panel according to claim 13, characterized in that, Along a direction perpendicular to the thickness of the display panel, the distance between the first end and the side of the first isolation portion facing the substrate is a first distance, and the distance between the second end and the side of the second isolation portion facing the substrate is a second distance, wherein the first distance is greater than the second distance; Preferably, the display panel further includes a light-emitting layer, the light-emitting layer including light-emitting units located in each of the pixel openings, the light-emitting unit including a light-emitting structure and a charge carrier layer disposed between the light-emitting structure and the first electrode, the charge carrier layer being in contact with the first isolation portion; the charge carrier layer being spaced apart from the second isolation portion.

15. The display panel according to claim 14, characterized in that, The charge carrier layer includes a hole injection layer and a hole transport layer stacked in a direction away from the substrate. The hole transport layer is in contact with the first isolation portion and is spaced apart from the second isolation portion.

16. A display device, characterized in that, Includes the display panel as described in any one of claims 1-15.

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