Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, an isolation structure and a pixel definition layer. The isolation structure is arranged on the substrate and encloses a plurality of isolation openings. At least part of a boundary line formed by intersection of the second side face and the second top face of the pixel limiting layer is located on the extending face of the first side face of the second layer, and / or at least part of the boundary line is located on the side, facing the first layer, of the extending face of the first side face, on one hand, the second layer can partially block an etching material in the follow-up manufacturing process, and the etching efficiency is improved. The etching damage to the pixel limiting part is reduced, so that the etching protection of the pixel limiting part is realized; and on the other hand, the width of the pixel limiting part between the adjacent pixel openings is reduced, the area of the pixel openings is increased, and the aperture ratio of the display panel is increased, so that the display effect and the use performance of the display panel are improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (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, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel, aiming to improve the performance of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, which includes: a substrate; an isolation structure located on the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure includes a first layer and a second layer, the second layer is located on a side of the first layer facing away from the substrate, the first layer is located within the second layer's projection on the substrate, the second layer includes a first top surface and a first bottom surface relatively arranged along a thickness direction of the display panel, and a first side surface connected between the first top surface and the first bottom surface; a pixel definition layer located on the substrate, the pixel definition layer includes a pixel defining portion and a plurality of pixel openings enclosed by the pixel defining portion, the pixel openings are connected to the corresponding isolation openings, the pixel defining portion includes a second top surface and a second bottom surface relatively arranged along the thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface; wherein the second side surface and the second top surface intersect to form a boundary line, at least a portion of the boundary line is located on an extension surface of the first side surface, and / or at least a portion of the boundary line is located on a side of the extension surface of the first side surface facing the first layer.

[0006] According to an implementation of the first aspect of the present application, the orthographic projection of the boundary line on the substrate is located within the orthographic projection of the second layer on the substrate.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure further includes a third layer located on the side of the first layer facing the substrate, and the orthographic projection of the first layer on the substrate is located within the orthographic projection of the third layer on the substrate.

[0008] According to any of the aforementioned implementations of the first aspect of the present application, the isolation structure is located on a side of the pixel defining portion facing away from the substrate.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the third layer includes a first segment located on the second top surface, and the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the first segment on the substrate.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the first segment protrudes from the second side surface to form a protrusion.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the width of the protrusion is less than or equal to 0.3 μm.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the third layer also includes a second segment located on a side of the first segment close to the pixel opening, the second segment is in contact with the first segment, and is located on the second side and covers at least a portion of the second side.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer includes a main body portion and at least one protrusion, and the at least one protrusion is located on a side of the main body portion facing the isolation opening.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the at least one protrusion includes a plurality of protrusions.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, a cross-sectional diagram of the first layer in the thickness direction of the display panel includes a bent edge.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the bent edge is serrated.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, at least one protrusion and the main body portion are an integrated structure.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, at least one protrusion and the main body portion are made of the same material.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer includes a third top surface and a third bottom surface that are relatively arranged along the thickness direction of the display panel, and a third side surface connected between the third top surface and the third bottom surface, wherein: the roughness of the third side surface is greater than the roughness of the third top surface, and / or the roughness of the third side surface is greater than the roughness of the third bottom surface. According to any of the aforementioned embodiments of the first aspect of the present application, the display panel also includes: a light-emitting layer, located on the substrate, the light-emitting layer includes a plurality of light-emitting units, and the light-emitting units are located in corresponding isolation openings; a first electrode layer, located on the side of the light-emitting layer away from the substrate, and including a plurality of first electrodes, the first electrodes are located in corresponding isolation openings, and the first electrodes are electrically connected to the isolation structure.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the light-emitting unit on the substrate is located within the orthographic projection of the first electrode on the substrate.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the light-emitting unit and the isolation structure are spaced apart.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer includes a conductive material.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the second layer includes a conductive material or an insulating material.

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer and the second layer both include metal materials, and the materials of the first layer and the second layer are different.

[0027] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel further includes a second electrode, the second electrode is located between the substrate and the pixel definition layer, and the second electrode is exposed by the pixel opening.

[0028] According to a second aspect of the present application, there is provided a display panel, which comprises: a substrate; an isolation structure located on the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a third layer, a first layer, and a second layer stacked one at a time in a direction away from the substrate, the orthographic projection of the first layer on the side facing the second layer on the substrate being located within the orthographic projection of the second layer on the substrate, and the orthographic projection of the first layer on the substrate being located within the orthographic projection of the third layer on the substrate; a pixel definition layer located on the substrate, the pixel definition layer comprising a pixel defining portion and a plurality of pixel openings enclosed by the pixel defining portion, the pixel openings being connected to the corresponding isolation openings, the pixel defining portion comprising a second top surface and a second bottom surface relatively arranged in a thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface; wherein the orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate are located at the orthographic projection of the third layer on the substrate and have an overlapping portion.

[0029] According to an implementation of the second aspect of the present application, the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate.

[0030] According to any of the aforementioned embodiments of the second aspect of the present application, the third layer includes a first segment located on the second top surface, and the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the first segment on the substrate.

[0031] According to any of the aforementioned embodiments of the second aspect of the present application, the first segment protrudes from the second side surface to form a protrusion.

[0032] According to any of the aforementioned embodiments of the second aspect of the present application, the width of the protrusion is less than or equal to 0.3 μm.

[0033] According to any of the aforementioned embodiments of the second aspect of the present application, the third layer also includes a second segment located on the side of the first segment close to the pixel opening, the second segment is in contact with the first segment, and is located on the second side and covers at least a portion of the second side.

[0034] According to any of the aforementioned embodiments of the second aspect of the present application, the first layer includes a main body portion and at least one protrusion, and the at least one protrusion is located on a side of the main body portion facing the isolation opening.

[0035] According to any of the aforementioned embodiments of the second aspect of the present application, the at least one protrusion includes a plurality of protrusions.

[0036] According to any of the aforementioned embodiments of the second aspect of the present application, a cross-sectional diagram of the first layer in the thickness direction of the display panel includes a bent edge.

[0037] According to any of the aforementioned embodiments of the second aspect of the present application, the bent edge is serrated.

[0038] According to any of the aforementioned embodiments of the second aspect of the present application, at least one protrusion and the main body portion are an integrated structure.

[0039] According to any of the aforementioned embodiments of the second aspect of the present application, at least one protrusion and the main body portion are made of the same material.

[0040] According to any of the aforementioned embodiments of the second aspect of the present application, the first layer includes a third top surface and a third bottom surface relatively arranged along the thickness direction of the display panel, and a third side surface connected between the third top surface and the third bottom surface, wherein: the roughness of the third side surface is greater than the roughness of the third top surface, and / or the roughness of the third side surface is greater than the roughness of the third bottom surface.

[0041] An embodiment of a third aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments.

[0042] An embodiment of a fourth aspect of the present application provides a method for preparing a display panel, including:

[0043] A pixel definition layer is prepared on the substrate, the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion, the pixel definition portion includes a second top surface and a second bottom surface that are oppositely arranged along the thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, and the second side surface and the second top surface intersect to form a boundary line;

[0044] An isolation structure is prepared on the side of the pixel definition layer facing away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure includes a first layer and a second layer, the second layer is located on the side of the first layer facing away from the substrate, the orthographic projection of the first layer facing the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, the second layer includes a first top surface and a first bottom surface relatively arranged along the thickness direction of the display panel, and a first side surface connected between the first top surface and the first bottom surface, the pixel opening is connected to the corresponding isolation opening, at least part of the boundary line is located on the extension surface of the first side surface, and / or, at least part of the boundary line is located on the side of the extension surface of the first side surface close to the first layer.

[0045] According to an implementation of the fourth aspect of the present application, the isolation structure further includes a third layer located on the side of the first layer facing the substrate, and the orthographic projection of the first layer on the substrate is located within the orthographic projection of the third layer on the substrate.

[0046] According to any of the aforementioned embodiments of the fourth aspect of the present application, the isolation structure is located on a side of the pixel defining portion facing away from the substrate.

[0047] According to any of the aforementioned embodiments of the fourth aspect of the present application, the orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion.

[0048] According to any of the aforementioned embodiments of the fourth aspect of the present application, the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate.

[0049] According to any of the aforementioned embodiments of the fourth aspect of the present application, the third layer includes a first segment located on the second top surface, and the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the first segment on the substrate.

[0050] According to any of the aforementioned embodiments of the fourth aspect of the present application, the third layer also includes a second segment located in the first segment close to the pixel opening, and the second segment is located on the second side and covers at least a portion of the second side.

[0051] An embodiment of a fifth aspect of the present application provides a method for preparing a display panel, including:

[0052] preparing a pixel definition material layer on a substrate;

[0053] An isolation structure is prepared on a side of the pixel definition material layer facing away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a third layer, a first layer, and a second layer stacked one at a time in a direction away from the substrate, an orthographic projection of the first layer on the side facing the second layer on the substrate is located within an orthographic projection of the second layer on the substrate, and an orthographic projection of the first layer on the substrate is located within an orthographic projection of the third layer on the substrate;

[0054] The pixel definition material layer is patterned to form a pixel definition layer, wherein the pixel definition layer includes a pixel definition portion and a plurality of pixel openings enclosed by the pixel definition portion, the pixel openings are connected to the corresponding isolation openings, the pixel definition portion includes a second top surface and a second bottom surface that are relatively arranged along the thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, and the orthographic projection of the third layer on the substrate has an overlapping portion with the orthographic projection of the second side surface on the substrate.

[0055] According to an implementation of the fifth aspect of the present application, in the step of patterning the pixel definition material layer, the method further includes:

[0056] The pixel definition material layer and the isolation structure are patterned to form a pixel defining portion and a third side of the first layer having a protrusion, wherein the third layer includes a first segment located on the second top surface, and the first segment protrudes from the second side to form a protrusion.

[0057] According to the display panel of the embodiment of the present application, the display panel includes a substrate, an isolation structure and a pixel definition layer. The isolation structure is arranged on the substrate and encloses a plurality of isolation openings to separate the light-emitting layer to form mutually disconnected light-emitting units, thereby reducing the crosstalk of carriers in the light-emitting layer, improving the display effect of the display panel, and the light-emitting unit can be prepared without using a precision mask plate, which can reduce the development and use of the precision mask plate and reduce the preparation cost. The pixel definition part defines the setting area of ​​each light-emitting unit to reduce the cross-color poor between each light-emitting unit. At least part of the boundary line formed by the intersection of the second side surface and the second top surface of the pixel definition layer is located on the extension surface of the first side surface of the second layer, and / or at least part of the boundary line is located on the side of the extension surface of the first side surface facing the first layer. On the one hand, the second layer can partially block the etching material in the subsequent process, reduce the etching damage to the pixel definition part, and realize the etching protection of the pixel definition part; on the other hand, the width of the pixel definition part between adjacent pixel openings is reduced, the area of ​​the pixel opening is increased, and the aperture ratio of the display panel is increased, thereby improving the display effect and use performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0059] Figure 1 is a partial cross-sectional view of a display panel provided in an embodiment of the present application;

[0060] Figure 2 is a partial cross-sectional view of a display panel in another embodiment;

[0061] Figure 3 is a partial cross-sectional view of a display panel in yet another embodiment;

[0062] Figure 4 is a partial cross-sectional view of a display panel in yet another embodiment;

[0063] Figure 5 is a partial cross-sectional view of a display panel in yet another embodiment;

[0064] Figure 6 is a partial cross-sectional view of a display panel in yet another embodiment;

[0065] Figure 7 is a partial cross-sectional view of a display panel in yet another embodiment;

[0066] Figure 8 is a partial cross-sectional view of a display panel in yet another embodiment;

[0067] Fig. 9 It is a schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0068] Fig.10 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application.

[0069] Description of reference numerals:

[0070] 10. Display panel;

[0071] 100. Substrate;

[0072] 200, isolation structure; 210, first layer; 211, third side surface; 212, protrusion; 220, second layer; 221, first top surface; 222, first bottom surface; 223, first side surface; 230, third layer; 231, first segment; 232, second segment; 233, protrusion; 240, isolation opening;

[0073] 300, light-emitting layer; 310, light-emitting unit;

[0074] 400, first electrode layer; 410, first electrode;

[0075] 500, pixel definition layer; 510, pixel defining portion; 511, second top surface; 512, second bottom surface; 513, second side surface; 514, boundary line; 520, pixel opening; 530, second electrode;

[0076] 600. Packaging department. DETAILED DESCRIPTION

[0077] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0078] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0079] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0080] Embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel. Embodiments of the display panel, the display device, and the method for manufacturing a display panel are described below in conjunction with the accompanying drawings.

[0081] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0082] Please also read Figure 1 , Figure 2 and Figure 8 , Figure 1 is a partial cross-sectional view of a display panel provided in an embodiment of the present application; Figure 2 is a partial cross-sectional view of a display panel in another embodiment; Figure 8 is a partial cross-sectional view of a display panel in yet another embodiment.

[0083] like Figure 1 , Figure 2 and Figure 8 As shown, the first embodiment of the present application provides a display panel 10, the display panel 10 includes: a substrate 100; an isolation structure 200, which is located on the substrate 100, and the isolation structure 200 encloses a plurality of isolation openings 240, the isolation structure 200 includes a first layer 210 and a second layer 220, the second layer 220 is located on the side of the first layer 210 away from the substrate 100, the orthographic projection of the side of the first layer 210 facing the second layer 220 on the substrate 100 is located within the orthographic projection of the second layer 220 on the substrate 100, the second layer 220 includes a first top surface 221 and a first bottom surface 222 which are arranged opposite to each other along the thickness direction of the display panel 10, and a first side surface 223 connected between the first top surface 221 and the first bottom surface 222; pixel positioning The pixel definition layer 500 is located on the substrate 100, and the pixel definition layer 500 includes a pixel defining portion 510 and a plurality of pixel openings 520 formed by the pixel defining portion 510, the pixel openings 520 are connected to the corresponding isolation openings 240, and the pixel defining portion 510 includes a second top surface 511 and a second bottom surface 512 that are relatively arranged along the thickness direction of the display panel 10, and a second side surface 513 connected between the second top surface 511 and the second bottom surface 512; wherein the second side surface 513 and the second top surface 511 intersect to form a boundary line 514, and at least a portion of the boundary line 514 is located on the extension surface of the first side surface 223, and / or, at least a portion of the boundary line 514 is located on the side of the extension surface of the first side surface 223 facing the first layer 210.

[0084] According to the display panel 10 of the embodiment of the present application, the display panel 10 includes a substrate 100, an isolation structure 200 and a pixel definition layer 500. The isolation structure 200 is arranged on the substrate 100 and encloses a plurality of isolation openings 240 to separate the light-emitting layer 300 to form mutually disconnected light-emitting units 310, thereby reducing the crosstalk of carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and preparing the light-emitting unit 310 does not require the use of a precision mask plate, which can reduce the development and use of precision masks and reduce the preparation cost. The pixel defining portion 510 defines the setting area of ​​each light-emitting unit 310 to reduce the cross-color defects between each light-emitting unit 310. At least part of the boundary line 514 formed by the intersection of the second side surface 513 and the second top surface 511 of the pixel defining layer is located on the extension surface of the first side surface 223 of the second layer 220, and / or at least part of the boundary line 514 is located on the side of the extension surface of the first side surface 223 facing the first layer 210. On the one hand, the second layer 220 can partially block the etching material in the subsequent process, reduce the etching damage to the pixel defining part 510, and achieve etching protection for the pixel defining part 510; on the other hand, the width of the pixel defining part 510 between adjacent pixel openings 520 is reduced, the area of ​​the pixel opening 520 is increased, and the aperture ratio of the display panel 10 is increased, thereby improving the display effect and performance of the display panel 10. Among them, the width of the pixel defining part 510 refers to the size of the pixel defining part 510 in the direction in which the pixel openings 520 are arranged side by side.

[0085] The first layer 210 and the second layer 220 are stacked to form the isolation structure 200. The orthographic projection of the first layer 210 disposed close to the substrate 100 on the substrate 100 is located within the orthographic projection of the second layer 220 on the substrate 100. The orthographic projection area of ​​the second layer 220 is larger than the orthographic projection area of ​​the first layer 210. The second layer 220 covers the surface of the first layer 210 close to the second layer 220. At this time, the first layer 210 is recessed relative to the second layer 220 in a direction away from the isolation opening 240. When preparing the light-emitting layer 300, the light-emitting layer 300 has a large drop at the edge of the isolation structure 200, and the first layer 210 is recessed relative to the second layer 220. The light-emitting layer 300 is difficult to connect at the edge of the isolation structure 200, and thus breaks. The light-emitting layer 300 breaks to form mutually disconnected light-emitting units 310.

[0086] When the pixel opening 520 and the isolation opening 240 are prepared, when the light-emitting units 310 of different colors and their corresponding first electrodes 410 and the packaging part 600 are prepared, these film layer materials will be etched and removed at the isolation openings 240 corresponding to the light-emitting units 310 of other colors when the light-emitting units 310, the first electrodes 410 and the packaging part 600 are prepared first, which may easily cause etching damage to the pixel defining parts 510 in the other isolation openings 240. Therefore, the boundary line 514 formed by the intersection of the second side surface 513 and the second top surface 511 of the pixel defining layer is located on the extension surface of the first side surface 223 of the second layer 220, or the boundary line 514 is located on the side of the extension surface of the first side surface 223 facing the first layer 210. The second layer 220 configured in this way can block the etching material to a certain extent, thereby reducing the etching damage to the pixel defining part 510.

[0087] There are many ways to set the substrate 100. For example, the substrate 100 may include a substrate and an array substrate arranged on the substrate. Alternatively, the substrate 100 is the substrate. Alternatively, the substrate 100 includes a buffer layer and a support plate on a side away from the substrate.

[0088] See also Figure 3 , Figure 3 is a partial cross-sectional view of a display panel in yet another embodiment.

[0089] like Figure 3 As shown, optionally, the orthographic projection of the boundary line 514 on the substrate 100 is located within the orthographic projection of the second layer 220 on the substrate 100, that is, the orthographic projection of the second top surface 511 on the substrate 100 is located within the orthographic projection of the second layer 220 on the substrate 100, further limiting the width of the pixel defining portion 510. On the one hand, the second layer 220 can partially block the etching material in the subsequent process, further reducing the etching damage to the pixel defining portion 510, so as to achieve etching protection for the pixel defining portion 510; on the other hand, the width of the pixel defining portion 510 between adjacent pixel openings 520 is further reduced, the area of ​​the pixel opening 520 is further increased, and the aperture ratio of the display panel 10 is increased, thereby improving the display effect and performance of the display panel 10.

[0090] See also Figure 4 , Figure 4 is a partial cross-sectional view of a display panel in yet another embodiment.

[0091] like Figure 4 As shown, in some optional embodiments, the isolation structure 200 further includes a third layer 230 located on the side of the first layer 210 facing the substrate 100 , and the orthographic projection of the first layer 210 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100 .

[0092] In these optional embodiments, in order to obtain the first layer 210 with a concave setting, the first layer 210 has a faster etching rate than the second layer 220 and the third layer 230 during the etching process, thereby forming the concave first layer 210. Since the etching rate of the first layer 210 is faster, the waste generated by etching is more likely to enter other positions of the display panel 10, thereby causing adverse effects. After the third layer 230 is set, the first layer 210 can be well attached to the third layer 230, and the generated etching waste falls on the third layer 230, which is easy to clean.

[0093] Optionally, the isolation structure 200 is located on the side of the pixel defining portion 510 away from the substrate 100, and the step difference between the second layer 220 of the isolation structure 200 and the pixel opening 520 is increased, so that the light-emitting layer 300 is disconnected at the edge of the second layer 220 to form a light-emitting unit 310 located in the pixel opening 520. When the third layer 230 is subsequently set, the third layer 230 can cover part of the pixel defining portion 510 to further protect the pixel defining portion 510 from etching.

[0094] In some optional embodiments, an orthographic projection of the third layer 230 on the substrate 100 and an orthographic projection of the second side surface 513 on the substrate 100 have an overlapping portion.

[0095] In these optional embodiments, the third layer 230 of the isolation structure 200 partially covers the pixel defining portion 510. When at least part of the second side 513 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100, the third layer 230 protects the second side 513 of the pixel defining portion 510, thereby reducing etching damage to the second side 513 of the pixel defining portion 510.

[0096] Please also read Figure 4 and Figure 5 , Figure 5 is a partial cross-sectional view of a display panel in yet another embodiment.

[0097] like Figure 4 and Figure 5 As shown, in some optional embodiments, the orthographic projection of the second top surface 511 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100 .

[0098] In these optional embodiments, the third layer 230 of the isolation structure 200 partially covers the pixel defining portion 510. When the orthographic projection of the second top surface 511 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100, the second top surface 511 of the pixel defining portion 510 is completely covered by the third layer 230, thereby increasing the coverage of the pixel defining portion 510 by the third layer 230, achieving a wider range of protection for the pixel defining portion 510, and further reducing the etching damage to the pixel defining portion 510. In order to make the orthographic projection of the second top surface 511 on the substrate 100 located within the orthographic projection of the third layer 230 on the substrate 100, the width of the pixel defining portion 510 is limited, thereby increasing the area of ​​the pixel opening 520, and improving the aperture ratio and display effect of the display panel 10.

[0099] like Figure 5 As shown, in some optional embodiments, the third layer 230 includes a first segment 231 located on the second top surface 511 , and the orthographic projection of the second top surface 511 on the substrate 100 is located within the orthographic projection of the first segment 231 on the substrate 100 .

[0100] In these optional embodiments, the first segment 231 partially covers the pixel defining portion 510. When the orthographic projection of the second top surface 511 on the substrate 100 is located within the orthographic projection of the first segment 231 on the substrate 100, that is, the second top surface 511 of the pixel defining portion 510 is completely covered by the first segment 231, the coverage of the pixel defining portion 510 by the first segment 231 is increased, a wider range of protection for the pixel defining portion 510 is achieved, and the etching damage to the pixel defining portion 510 is further reduced.

[0101] like Figure 5 As shown, in some optional embodiments, the first segment 231 protrudes from the second side surface 513 to form a protrusion 233 .

[0102] In these optional embodiments, the protrusion 233 is arranged to protrude toward the pixel opening 520 relative to the second side surface 513. When the light-emitting layer 300 is subsequently prepared, the light-emitting layer 300 is disconnected at the edge of the protrusion 233 to form a light-emitting unit 310 located in the pixel opening 520. The light-emitting unit 310 formed by disconnection is difficult to contact with the third layer 230, thereby avoiding the undesirable phenomenon of lateral leakage caused by the light-emitting unit 310 contacting the isolation structure 200. The formation of the protrusion 233 makes the surface width of the first segment 231 close to the substrate 100 larger than the width of the second top surface 511 of the pixel defining portion 510, and the width refers to the dimension along the pixel opening 520 pointing to the adjacent pixel opening 520.

[0103] In some optional embodiments, the width of the protrusion 233 is less than or equal to 0.3 μm, for example, the width of the protrusion 233 is 0.1 μm, 0.2 μm, 0.25 μm or 0.3 μm, etc. The width of the protrusion 233 refers to the size of the protrusion 233 in the direction in which the pixel openings 520 are arranged side by side.

[0104] In these optional embodiments, the width of the protrusion 233 is less than or equal to 0.3 μm, which can improve the problem that the width of the protrusion 233 is too large, resulting in the first electrode layer 400 being disconnected at the edge of the protrusion 233 during the subsequent preparation of the first electrode layer 400, and the first electrode 410 is difficult to overlap with the isolation structure 200. It can also improve the problem that the width of the protrusion 233 is too large, resulting in the protrusion 233 blocking the light of the light-emitting unit 310 in the pixel opening 520, thereby affecting the display effect of the display panel 10.

[0105] See also Figure 6 , Figure 6 is a partial cross-sectional view of a display panel in yet another embodiment.

[0106] like Figure 6 As shown, in some optional embodiments, the third layer 230 also includes a second segment 232 located on the side of the first segment 231 close to the pixel opening 520 , the second segment 232 is in contact with the first segment 231 , and is located on the second side 513 and covers at least a portion of the second side 513 .

[0107] In these optional embodiments, the second segment 232 of the third layer 230 covers the second side surface 513 of the pixel defining portion 510, thereby increasing the coverage of the pixel defining portion 510 by the third layer 230, achieving a wider range of protection for the pixel defining portion 510, and further reducing etching damage to the pixel defining portion 510. Moreover, the second segment 232 is disposed on the second side surface 513 of the pixel defining portion 510, which can facilitate the overlap of the first electrode 410 and the third layer 230, thereby increasing the overlap effect of the first electrode 410 and the isolation structure 200, thereby ensuring that adjacent first electrodes 410 are electrically connected through the isolation structure 200 to form a full-surface electrode.

[0108] See also Figure 7 , Figure 7 is a partial cross-sectional view of a display panel in yet another embodiment.

[0109] like Figure 7 As shown, in some optional embodiments, the first layer 210 includes a main body portion and at least one protrusion 212 , and the at least one protrusion 212 is located on a side of the main body portion facing the isolation opening 240 .

[0110] In these optional embodiments, a protrusion 212 is formed on the side of the main portion of the first layer 210 facing the isolation opening 240. When the encapsulation part 600 of the inorganic material is subsequently prepared, the bonding area between the encapsulation part 600 and the first layer 210 is larger and the bonding effect is better, thereby better preventing the wet etching solution from invading and corroding the first electrode 410 through the path between the encapsulation part 600 and the first layer 210, thereby improving the light-emitting reliability of the display panel 10.

[0111] Optionally, at least one protrusion 212 includes multiple protrusions 212, further improving the bonding area and bonding effect between the packaging part 600 and the third side 211, preventing the wet etching solution from invading and corroding the first electrode 410 through the path between the packaging part 600 and the third side 211, and improving the luminescence reliability of the display panel 10.

[0112] Optionally, the cross-sectional pattern of the first layer 210 in the thickness direction of the display panel 10 includes a bent edge, which further increases the bonding area and bonding effect between the encapsulation part 600 and the first layer 210, prevents the wet etching solution from invading and corroding the first electrode 410 through the path between the encapsulation part 600 and the first layer 210, and improves the light-emitting reliability of the display panel 10. For example, the bent edge is a sawtooth shape, that is, the bent edge is a burr structure, and the sawtooth-shaped bent edge has a better bonding effect with the encapsulation part 600.

[0113] Optionally, at least one protrusion 212 and the main body are an integrated structure. Optionally, at least one protrusion 212 and the main body are made of the same material. The protrusion 212 and the main body can be prepared simultaneously with the same material, simplifying the preparation process.

[0114] In these optional embodiments, the first layer 210 includes a third top surface and a third bottom surface relatively arranged along the thickness direction of the display panel 10, and a third side surface 211 connected between the third top surface and the third bottom surface, wherein: the roughness of the third side surface 211 is greater than the roughness of the third top surface, and / or the roughness of the third side surface 211 is greater than the roughness of the third bottom surface.

[0115] In these optional embodiments, the third side surface 211 has a greater roughness. When the encapsulation part 600 of the inorganic material is subsequently prepared, the bonding area between the encapsulation part 600 and the third side surface 211 is larger, and the bonding effect is better, so that the wet etching liquid can be better prevented from invading and corroding the first electrode 410 through the path between the encapsulation part 600 and the third side surface 211, thereby improving the light emitting reliability of the display panel 10. Figure 8As shown, in some optional embodiments, the display panel 10 also includes: a light-emitting layer 300, located on the substrate 100, the light-emitting layer 300 includes a plurality of light-emitting units 310, and the light-emitting units 310 are located in corresponding isolation openings 240; a first electrode layer 400, located on the side of the light-emitting layer 300 away from the substrate 100, and includes a plurality of first electrodes 410, the first electrodes 410 are located in corresponding isolation openings 240, and the first electrodes 410 are electrically connected to the isolation structure 200.

[0116] In these optional embodiments, the light-emitting unit 310 is located in the pixel opening 520 to realize the light-emitting display of the display panel 10. The isolation structure 200 separates the first electrode layer 400 to form mutually spaced first electrodes 410, and the mutually spaced first electrodes 410 are electrically connected through the isolation structure 200 to form a whole-surface electrode to ensure the normal light emission of the light-emitting unit 310.

[0117] Optionally, the orthographic projection of the light emitting unit 310 on the substrate 100 is located within the orthographic projection of the first electrode 410 on the substrate 100, that is, the first electrode 410 is arranged to cover the light emitting unit 310 to serve as an electrode of the light emitting unit 310, thereby ensuring the normal light emission of the light emitting unit 310 and improving the display effect of the display panel 10. In some optional embodiments, the light emitting unit 310 is spaced apart from the isolation structure 200.

[0118] Optionally, the light-emitting unit 310 and the isolation structure 200 are spaced apart, that is, the light-emitting units 310 are spaced apart from each other, so as to reduce the crosstalk of carriers between the light-emitting units 310 and improve the cross-color problem of the light-emitting units 310 .

[0119] Optionally, the display panel 10 further includes a second electrode 530, the second electrode 530 is located between the substrate 100 and the pixel definition layer 500, and the second electrode 530 is exposed by the pixel opening 520. One of the second electrode 530 and the first electrode 410 serves as the anode of the light-emitting unit 310, and the other serves as the cathode of the light-emitting unit 310. In the embodiment of the present application, the second electrode 530 is used as the anode of the light-emitting unit 310, and the first electrode 410 is used as the cathode of the light-emitting unit 310 for illustration.

[0120] Optionally, the first layer 210 includes a conductive material, for example, the first layer 210 includes a non-metallic conductive material or a metallic conductive material, so as to achieve electrical connection between the isolation structure 200 and the first electrode 410 .

[0121] In some optional embodiments, the second layer 220 includes a conductive material or an insulating material, wherein the insulating material may be at least one of silicon nitride or silicon oxide.

[0122] In these optional embodiments, the second layer 220 includes a conductive material, for example, the second layer 220 includes a non-metallic conductive material or a metallic conductive material. When the second layer 220 is a non-metallic conductive material or an insulating material, the second layer 220 is difficult to be etched during wet etching of the first layer 210 using an etching solution, thereby making it easier for the first layer 210 to be concave relative to the second layer 220. When the auxiliary structure is electrically connected to the touch electrode, the second layer 220 is a conductive material.

[0123] In some optional embodiments, the first layer 210 and the second layer 220 include metal materials, and the materials of the first layer 210 and the second layer 220 are different.

[0124] In these optional embodiments, when both the first layer 210 and the second layer 220 are made of metal materials, the first layer 210 may be wet-etched with an etching solution, and the etching rate of the second layer 220 may be lower than the etching rate of the first layer 210 by setting the etching solution. Since the etching rate of the first layer 210 is relatively high, when the etching solution is used for wet etching, even if the second layer 220 is etched to a certain extent, the first layer 210 is etched faster, so that the first layer 210 is concavely arranged relative to the second layer 220. Optionally, the material of the first layer 210, the second layer 220 or the third layer 230 includes materials such as Ti, Al, Mo, Cu, Ti, ITO or their alloy materials.

[0125] Optionally, the material of the second layer 220 is titanium (Ti) or molybdenum (Mo), the material of the first layer 210 is aluminum (Al), silver (Ag) or copper (Cu), and the material of the third layer 230 is titanium (Ti) or molybdenum (Mo). For example, the isolation structure 200 is a three-layer metal composite material of Ti / Al / Ti (titanium / aluminum / titanium) or Ti / Al / Mo (titanium / aluminum / molybdenum).

[0126] Optionally, the material of the first electrode 410 includes a transparent conductive material, such as MgAg alloy, ITO, etc.

[0127] Optionally, the material of the second electrode 530 includes metal oxide, metal or a multi-layer material composite structure, such as ITO / Ag / ITO. The display panel 10 also includes a pixel circuit, which supplies power to the second electrode 530 to control the display of the display panel 10.

[0128] Optionally, the material of the pixel defining portion 510 includes an insulating material. Optionally, the material of the pixel defining portion 510 includes an inorganic material. Optionally, the material of the pixel defining portion 510 includes an inorganic material containing Si, such as SiO, SiN, etc., which has a protective effect on the second electrode 530 and prevents the second electrode 530 from being oxidized.

[0129] Optionally, the material of the packaging part 600 includes inorganic materials, such as SiO, SiN, etc., which have good water and oxygen isolation performance.

[0130] Patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, and PCT / CN2024 / 099072 record relevant contents of the isolation structure 200 (or partition structure or isolation column) for reference.

[0131] Optionally, the light emitting layer 300 includes an electron injection layer (EIL), an electron transport layer (ETL), a light emitting material layer, a hole injection layer (HIL) and a hole transport layer (HTL).

[0132] like Figure 6 As shown, the second aspect of the present application provides a display panel 10, the display panel 10 includes: a substrate 100; an isolation structure 200, located on the substrate 100, the isolation structure 200 encloses a plurality of isolation openings 240, the isolation structure 200 includes a third layer 230, a first layer 210 and a second layer 220 stacked one at a time in a direction away from the substrate 100, the orthographic projection of the first layer 210 toward the second layer 220 on the substrate 100 is located within the orthographic projection of the second layer 220 on the substrate 100, and the orthographic projection of the first layer 210 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100; a pixel definition layer 500, located on the substrate 100, the pixel definition layer 500 includes a pixel defining portion 510 and a plurality of pixel openings 520 enclosed by the pixel defining portion 510, the pixel openings 520 are connected to the corresponding isolation openings 240, the pixel defining portion 510 includes a second top surface 511 and a second bottom surface 512 arranged opposite to each other along the thickness direction of the display panel 10, and a second side surface 513 connected between the second top surface 511 and the second bottom surface 512; wherein, the orthographic projection of the third layer 230 on the substrate 100 and the orthographic projection of the second side surface 513 on the substrate 100 are located at the orthographic projection of the third layer 230 on the substrate 100 and have an overlapping portion.

[0133] According to the display panel 10 of the embodiment of the present application, the display panel 10 includes a substrate 100, an isolation structure 200 and a pixel definition layer 500. The isolation structure 200 is arranged on the substrate 100 and encloses a plurality of isolation openings 240 to separate the light-emitting layer 300 to form mutually disconnected light-emitting units 310, thereby reducing the crosstalk of carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and preparing the light-emitting unit 310 does not require the use of a precision mask plate, which can reduce the development and use of precision masks and reduce the preparation cost. The pixel defining portion 510 defines the setting area of ​​each light-emitting unit 310 to reduce the cross-color defects between each light-emitting unit 310. The third layer 230 of the isolation structure 200 partially covers the pixel defining portion 510. When at least part of the second side surface 513 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100, the third layer 230 protects the second side surface 513 of the pixel defining portion 510 and reduces etching damage to the second side surface 513 of the pixel defining portion 510.

[0134] The structural design in this embodiment can be applied to other display panels 10 , and the specific selection can be made according to actual conditions, and this application does not impose any specific restrictions on it.

[0135] The embodiment of the third aspect of the present application further provides a display device, comprising the display panel 10 of any of the above embodiments. Since the display device provided by the embodiment of the third aspect of the present application comprises the display panel 10 of any of the above embodiments, the display device provided by the embodiment of the third aspect of the present application has the beneficial effects of the display panel 10 of any of the above embodiments, which will not be described in detail here.

[0136] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0137] See also Fig. 9 , Fig. 9 It is a schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application.

[0138] The fourth aspect of the present application also provides a method for preparing a display panel 10. The display panel 10 may be the display panel 10 provided by any of the above embodiments. Figures 1 to 8 , the preparation method comprises:

[0139] Step S01: Prepare a pixel definition layer on a substrate, the pixel definition layer comprising a pixel defining portion and a pixel opening enclosed by the pixel defining portion, the pixel defining portion comprising a second top surface and a second bottom surface relatively arranged along a thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, the second side surface and the second top surface intersect to form a boundary line.

[0140] Step S02: Prepare an isolation structure on the side of the pixel definition layer facing away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure includes a first layer and a second layer, the second layer is located on the side of the first layer facing away from the substrate, the orthographic projection of the first layer facing the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, the second layer includes a first top surface and a first bottom surface relatively arranged along the thickness direction of the display panel, and a first side surface connected between the first top surface and the first bottom surface, the pixel opening is connected to the corresponding isolation opening, at least part of the boundary line is located on the extension surface of the first side surface, and / or, at least part of the boundary line is located on the side of the extension surface of the first side surface close to the first layer.

[0141] According to the preparation method of the fourth aspect of the present application, the pixel definition layer 500 is prepared by step S01, and the pixel definition part 510 defines the setting area of ​​each light-emitting unit 310, thereby reducing the cross-color defect between each light-emitting unit 310. The isolation structure 200 is prepared by step S02, and the isolation structure 200 is arranged on the substrate 100 and encloses a plurality of isolation openings 240 to separate the light-emitting layer 300 to form mutually disconnected light-emitting units 310, thereby reducing the crosstalk of carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and the preparation of the light-emitting unit 310 can be prepared without using a precision mask plate, which can reduce the development and use of precision mask plates and reduce the preparation cost. The boundary line 514 formed by the intersection of the second side surface 513 and the second top surface 511 of the pixel defining layer is located on the extension surface of the first side surface 223 of the second layer 220, or the boundary line 514 is located on the side of the extension surface of the first side surface 223 facing the first layer 210. On the one hand, the second layer 220 can partially block the etching material in the subsequent process to reduce the etching damage to the pixel defining portion 510, so as to achieve etching protection for the pixel defining portion 510; on the other hand, the width of the pixel defining portion 510 between adjacent pixel openings 520 is reduced, the area of ​​the pixel opening 520 is increased, and the aperture ratio of the display panel 10 is increased, thereby improving the display effect and performance of the display panel 10. Step S01 is located before step S02, and a pixel definition layer 500 having a pixel opening 520 is first formed on the substrate 100, and then the isolation structure 200 is prepared, so as to control the width of the second layer 220 of the isolation structure 200 and the positional relationship between the extended surface of the first side 223 and the boundary line 514, so that the boundary line 514 is located on the extended surface of the first side 223 or on the side of the extended surface of the first side 223 close to the first layer 210.

[0142] Optionally, the third layer 230 includes a first segment 231 located on the second top surface 511 , and an orthographic projection of the second top surface 511 on the substrate 100 is located within an orthographic projection of the first segment 231 on the substrate 100 .

[0143] Optionally, the third layer 230 further includes a second segment 232 located near the pixel opening 520 in the first segment 231 , and the second segment 232 is located on the second side surface 513 and covers at least a portion of the second side surface 513 .

[0144] In these optional embodiments, in order to form a third layer 230 having a first segment 231 and a second segment 232, with the second segment 232 covering at least a portion of the second side 513, it is necessary to first prepare a pixel definition layer 500 having a pixel opening 520, and prepare an isolation structure 200 on the pixel definition layer 500, that is, step S01 is before step S02, so that the second segment 232 of the third layer 230 can be located on the second side 513 of the pixel defining portion 510.

[0145] See also Fig.10 , Fig.10 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application.

[0146] The fifth aspect of the present application also provides a method for preparing a display panel 10. The display panel 10 may be the display panel 10 provided by any of the above embodiments. Figures 1 to 8 , the preparation method comprises:

[0147] Step S1: preparing a pixel definition material layer on a substrate.

[0148] Step S2: preparing an isolation structure on the side of the pixel definition material layer facing away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a third layer, a first layer, and a second layer stacked one at a time in a direction away from the substrate, the orthographic projection of the first layer toward the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, and the orthographic projection of the first layer on the substrate is located within the orthographic projection of the third layer on the substrate.

[0149] Step S3: patterning the pixel definition material layer to form a pixel definition layer, wherein the pixel definition layer includes a pixel defining portion and a plurality of pixel openings enclosed by the pixel defining portion, the pixel openings are connected to the corresponding isolation openings, the pixel defining portion includes a second top surface and a second bottom surface relatively arranged along the thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, and the orthographic projection of the third layer on the substrate has an overlapping portion with the orthographic projection of the second side surface on the substrate.

[0150] According to the preparation method of the fifth embodiment of the present application, the pixel definition layer 500 is prepared by step S01, and the pixel definition part 510 defines the setting area of ​​each light-emitting unit 310, thereby reducing the cross-color defect between each light-emitting unit 310. The isolation structure 200 is prepared by step S02, and the isolation structure 200 is arranged on the substrate 100 and encloses a plurality of isolation openings 240 to separate the light-emitting layer 300 to form mutually disconnected light-emitting units 310, thereby reducing the crosstalk of carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and the preparation of the light-emitting unit 310 can be prepared without using a precision mask plate, which can reduce the development and use of precision mask plates and reduce the preparation cost. The third layer 230 of the isolation structure 200 partially covers the pixel defining portion 510. When at least part of the second side surface 513 on the substrate 100 is located within the orthographic projection of the third layer 230 on the substrate 100, the third layer 230 protects the second side surface 513 of the pixel defining portion 510 and reduces etching damage to the second side surface 513 of the pixel defining portion 510.

[0151] Optionally, in step S3, the method further includes:

[0152] The pixel definition material layer and the isolation structure 200 are patterned to form a pixel defining portion 510 and a third side 211 of the first layer 210 having a protrusion 212. The third layer 230 includes a first segment 231 located on the second top surface 511. The first segment 231 protrudes from the second side 513 to form a protrusion 233.

[0153] In these optional embodiments, step S3 is located after step S2, and the isolation structure 200 is first formed on the substrate 100, and then the pixel definition material layer is patterned to form a pixel definition layer 500 with a pixel opening 520, so that the width of the pixel definition part 510 can be controlled, the protrusion 233 is formed, and the aperture ratio is improved. The pixel definition material layer and the isolation structure 200 are patterned simultaneously, and the pixel definition part 510 and the third side 211 of the first layer 210 with the protrusion 212 are formed at the same time, and the third layer 230 includes a first segment 231 located on the second top surface 511, and the first segment 231 protrudes from the second side 513 to form the protrusion 233, which simplifies the preparation process. The step of patterning the pixel definition material layer to form the pixel opening 520 and the step of patterning the isolation structure 200 to form the protrusion 212 can also be located in different steps, and prepared step by step.

[0154] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; an isolation structure, located on the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a first layer and a second layer, the second layer is located on a side of the first layer away from the substrate, the orthographic projection of the side of the first layer facing the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, the second layer comprises a first top surface and a first bottom surface that are oppositely arranged along a thickness direction of the display panel, and a first side surface connected between the first top surface and the first bottom surface; a pixel definition layer, located on the substrate, the pixel definition layer comprising a pixel definition portion and a plurality of pixel openings enclosed by the pixel definition portion, the pixel openings being connected to the corresponding isolation openings, the pixel definition portion comprising a second top surface and a second bottom surface oppositely disposed along a thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface; The second side surface and the second top surface intersect to form a boundary line, and at least part of the boundary line is located on an extension surface of the first side surface, and / or at least part of the boundary line is located on a side of the extension surface of the first side surface facing the first layer.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the boundary line on the substrate is located within the orthographic projection of the second layer on the substrate.

3. The display panel according to claim 1, characterized in that: The isolation structure further includes a third layer located on a side of the first layer facing the substrate, and an orthographic projection of the first layer on the substrate is located within an orthographic projection of the third layer on the substrate; Preferably, the isolation structure is located on a side of the pixel defining portion facing away from the substrate.

4. The display panel according to claim 3, characterized in that: The orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion; Preferably, the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate.

5. The display panel according to claim 3, characterized in that: The third layer includes a first segment located on the second top surface, and an orthographic projection of the second top surface on the substrate is located within an orthographic projection of the first segment on the substrate.

6. The display panel according to claim 5, characterized in that: The first segment protrudes from the second side surface to form a protrusion; Preferably, the width of the protrusion is less than or equal to 0.3 μm.

7. The display panel according to claim 5, characterized in that: The third layer further includes a second segment located on a side of the first segment close to the pixel opening. The second segment contacts the first segment and is located on the second side surface and covers at least a portion of the second side surface.

8. The display panel according to claim 1, characterized in that: The first layer comprises a main body portion and at least one protrusion, wherein the at least one protrusion is located on a side of the main body portion facing the isolation opening; Preferably, the at least one protrusion comprises a plurality of protrusions; Preferably, the cross-sectional shape of the first layer in the thickness direction of the display panel includes a bent edge; Preferably, the bent edge is serrated; Preferably, the at least one protrusion and the main body portion are an integral structure; Preferably, the at least one protrusion and the main body portion are made of the same material.

9. The display panel according to claim 1, characterized in that: The first layer includes a third top surface and a third bottom surface which are arranged opposite to each other along the thickness direction of the display panel, and a third side surface connected between the third top surface and the third bottom surface, wherein: The roughness of the third side surface is greater than the roughness of the third top surface, and / or the roughness of the third side surface is greater than the roughness of the third bottom surface.

10. The display panel according to claim 1, characterized in that: The display panel further includes: A light-emitting layer, located on the substrate, comprising a plurality of light-emitting units, wherein the light-emitting units are located in corresponding isolation openings; A first electrode layer, located on a side of the light-emitting layer away from the substrate, and comprising a plurality of first electrodes, wherein the first electrodes are located in corresponding isolation openings and are electrically connected to the isolation structure; Preferably, the orthographic projection of the light emitting unit on the substrate is located within the orthographic projection of the first electrode on the substrate; Preferably, the light emitting unit and the isolation structure are spaced apart; Preferably, the first layer comprises a conductive material; Preferably, the second layer comprises a conductive material or an insulating material; Preferably, the first layer and the second layer both comprise metal materials, and the materials of the first layer and the second layer are different; Preferably, the display panel further includes a second electrode, wherein the second electrode is located between the substrate and the pixel definition layer, and the second electrode is exposed from the pixel opening.

11. A display panel, characterized in that: The display panel comprises: substrate; an isolation structure, located on the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a third layer, a first layer, and a second layer stacked one at a time in a direction away from the substrate, the orthographic projection of the first layer facing the second layer on the substrate being located within the orthographic projection of the second layer on the substrate, and the orthographic projection of the first layer on the substrate being located within the orthographic projection of the third layer on the substrate; a pixel definition layer, located on the substrate, the pixel definition layer comprising a pixel definition portion and a plurality of pixel openings enclosed by the pixel definition portion, the pixel openings being connected to the corresponding isolation openings, the pixel definition portion comprising a second top surface and a second bottom surface oppositely disposed along a thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface; The orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion.

12. The display panel according to claim 11, characterized in that: The orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate.

13. The display panel according to claim 11, characterized in that: The third layer includes a first segment located on the second top surface, and an orthographic projection of the second top surface on the substrate is located within an orthographic projection of the first segment on the substrate; Preferably, the first segment protrudes from the second side surface to form a protrusion; Preferably, the width of the protrusion is less than or equal to 0.3 μm; Preferably, the third layer further includes a second segment located on a side of the first segment close to the pixel opening, the second segment is in contact with the first segment, and is located on the second side surface and covers at least a portion of the second side surface.

14. The display panel according to claim 11, characterized in that: The first layer comprises a main body portion and at least one protrusion, wherein the at least one protrusion is located on a side of the main body portion facing the isolation opening; Preferably, the at least one protrusion comprises a plurality of protrusions; Preferably, the cross-sectional shape of the first layer in the thickness direction of the display panel includes a bent edge; Preferably, the bent edge is serrated; Preferably, the at least one protrusion and the main body portion are an integral structure; Preferably, the at least one protrusion and the main body portion are made of the same material.

15. The display panel according to claim 11, characterized in that: The first layer includes a third top surface and a third bottom surface which are arranged opposite to each other along the thickness direction of the display panel, and a third side surface connected between the third top surface and the third bottom surface, wherein: The roughness of the third side surface is greater than the roughness of the third top surface, and / or the roughness of the third side surface is greater than the roughness of the third bottom surface.

16. A display device, characterized in that: A display panel comprising any one of claims 1-15.

17. A method for preparing a display panel, characterized in that: include: A pixel definition layer is prepared on a substrate, wherein the pixel definition layer includes a pixel definition portion and a plurality of pixel openings formed by the pixel definition portion, wherein the pixel definition portion includes a second top surface and a second bottom surface that are oppositely arranged along a thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, wherein the second side surface and the second top surface intersect to form a boundary line; An isolation structure is prepared on a side of the pixel definition layer facing away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a first layer and a second layer, the second layer is located on a side of the first layer facing away from the substrate, the side of the first layer facing the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, the second layer comprises a first top surface and a first bottom surface relatively arranged along the thickness direction of the display panel, and a first side surface connected between the first top surface and the first bottom surface, the pixel opening is connected to the corresponding isolation opening, at least a portion of the boundary line is located on an extension surface of the first side surface, and / or at least a portion of the boundary line is located on a side of the extension surface of the first side surface close to the first layer.

18. The preparation method according to claim 17, characterized in that: The isolation structure further includes a third layer located on a side of the first layer facing the substrate, and an orthographic projection of the first layer on the substrate is located within an orthographic projection of the third layer on the substrate; Preferably, the isolation structure is located on a side of the pixel defining portion away from the substrate; Preferably, the orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion; Preferably, the orthographic projection of the second top surface on the substrate is located within the orthographic projection of the third layer on the substrate; Preferably, the third layer includes a first segment located on the second top surface, and an orthographic projection of the second top surface on the substrate is located within an orthographic projection of the first segment on the substrate; Preferably, the third layer further includes a second segment located in the first segment close to the pixel opening, and the second segment is located on the second side surface and covers at least a portion of the second side surface.

19. A method for preparing a display panel, characterized in that: The method comprises: preparing a pixel definition material layer on a substrate; An isolation structure is prepared on a side of the pixel definition material layer facing away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation structure comprises a third layer, a first layer, and a second layer stacked one at a time in a direction away from the substrate, the orthographic projection of the first layer facing the second layer on the substrate is located within the orthographic projection of the second layer on the substrate, and the orthographic projection of the first layer on the substrate is located within the orthographic projection of the third layer on the substrate; The pixel definition material layer is patterned to form a pixel definition layer, wherein the pixel definition layer includes a pixel defining portion and a plurality of pixel openings enclosed by the pixel defining portion, wherein the pixel openings are connected to the corresponding isolation openings, and the pixel defining portion includes a second top surface and a second bottom surface that are relatively arranged along the thickness direction of the display panel, and a second side surface connected between the second top surface and the second bottom surface, and the orthographic projection of the third layer on the substrate and the orthographic projection of the second side surface on the substrate have an overlapping portion.

20. The preparation method according to claim 19, characterized in that: In the step of patterning the pixel definition material layer, the method further comprises: The pixel definition material layer and the isolation structure are patterned to form a pixel defining portion and a third side of the first layer having a protrusion, wherein the third layer includes a first segment located on the second top surface, and the first segment protrudes from the second side to form a protrusion.

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