Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display, the display panel comprises a substrate, a light-emitting element located on one side of the substrate and a packaging structure, and a transparent packaging layer of the packaging structure is located on the side, away from the substrate, of the light-emitting element and covers the light-emitting element. The transparent packaging layer comprises a first part and a second part, and at least part of the second part is located in the edge area of the transparent packaging layer and at least part of the second part surrounds the first part. In the direction perpendicular to the plane where the display panel is located, the thickness of the area, including the second part, of the transparent packaging layer is not smaller than the thickness of the central area of the transparent packaging layer, and the second part can effectively solve the problem that the edge surface of the transparent packaging layer inclines downwards due to the first part; therefore, the problem that the inclination angle of the edge surface of the transparent packaging layer is large is effectively solved, the problem of bubbles between the transparent packaging layer and the upper film layer due to the large inclination angle of the edge of the transparent packaging layer is effectively solved, and the display effect and the yield of the display panel are improved.

Description

Technical Field

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

[0002] Display panels typically include a transparent encapsulation layer, also known as a transparent printing layer, for encapsulating light-emitting elements. However, due to the low viscosity of the material in this transparent printing layer, severe edge flow can lead to a large edge tilt angle and air bubbles between the transparent printing layer and the overlying film layer, affecting the yield of the display panel. Summary of the Invention

[0003] In view of this, this application provides a display panel, a display device, and a splicing display device, as follows:

[0004] A display panel, comprising:

[0005] substrate;

[0006] Multiple light-emitting elements located on one side of the substrate;

[0007] The packaging structure includes a transparent packaging layer located on the side of the plurality of light-emitting elements away from the substrate, covering the light-emitting elements;

[0008] The transparent encapsulation layer includes a first part and a second part, at least a portion of the second part is located in the edge region of the transparent encapsulation layer and at least a portion surrounds the first part; along a first direction, the thickness of the edge of the transparent encapsulation layer including the second part is not less than the thickness of the central region of the transparent encapsulation layer, and the first direction is perpendicular to the plane where the display panel is located.

[0009] Compared with related technologies, the beneficial effects of the technical solution of this application are as follows:

[0010] The display panel includes a substrate, a light-emitting element located on one side of the substrate, and an encapsulation structure. The encapsulation structure includes a transparent encapsulation layer located on the side of the light-emitting element away from the substrate and covering the light-emitting element. The transparent encapsulation layer includes a first portion and a second portion. At least a portion of the second portion is located in the edge region of the transparent encapsulation layer and at least a portion surrounds the first portion. Along a first direction, which is perpendicular to the plane of the display panel, the thickness of the region of the transparent encapsulation layer including the second portion is not less than the thickness of the central region of the transparent encapsulation layer. Therefore, the display panel can effectively solve the problem of the edge surface of the transparent encapsulation layer tilting downwards caused by the first portion by utilizing the second portion, so that all parts of the transparent encapsulation layer on the side away from the substrate are on the same horizontal plane relative to the plane of the substrate, suppressing the tilt of the edge surface of the transparent encapsulation layer as much as possible, effectively solving the problem of a large tilt angle of the edge surface of the transparent encapsulation layer, and thus also effectively solving the problem of air bubbles between the transparent encapsulation layer and the upper film layer caused by the large tilt angle of the edge surface of the transparent encapsulation layer, improving the display effect and yield of the display panel. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0013] Figure 1 This is a schematic diagram of the structure of an existing display panel;

[0014] Figure 2 A schematic diagram of the structure of a display panel provided in this application;

[0015] Figure 3 A schematic diagram of another display panel provided in this application;

[0016] Figure 4 A schematic diagram of the structure of another display panel provided in this application;

[0017] Figure 5 A schematic diagram of the structure of another display panel provided in this application;

[0018] Figure 6 A schematic diagram of the structure of another display panel provided in this application;

[0019] Figure 7 A schematic diagram of the structure of another display panel provided in this application;

[0020] Figure 8 A schematic diagram of the structure of another display panel provided in this application;

[0021] Figure 9 A schematic diagram of the structure of another display panel provided in this application;

[0022] Figure 10 A schematic diagram of the structure of another display panel provided in this application;

[0023] Figure 11 A schematic diagram of the structure of another display panel provided in this application;

[0024] Figure 12 A schematic diagram of the structure of a display device provided in this application;

[0025] Figure 13 This is a structural schematic diagram of a splicing display panel provided in this application. Detailed Implementation

[0026] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely one area of ​​this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] As described in the background section, the material viscosity of the transparent printed layer in the display panel is low, resulting in severe edge flow, such as... Figure 1 As shown, this results in a larger edge tilt angle for the transparent printing layer 1, specifically a smaller thickness in the edge region of the transparent printing layer 1. This causes the surface of the edge region to tilt downwards, leading to a difference in display effect between the edge region and the corresponding central region, thus affecting the final display effect of the display panel. Furthermore, because the surface of the edge region of the transparent printing layer 1 tilts downwards, it can also cause poor adhesion to the upper film layer 2 (e.g., a glass cover), resulting in air bubbles between the two layers and affecting the yield rate of the display panel.

[0029] It should be noted that the presence of air bubbles between the transparent printing layer 1 and the upper film layer 2 refers to the fact that the edge of the transparent printing layer 1 has a large tilt angle, which causes the edge of the transparent printing layer 1 to not adhere to the upper film layer 2, resulting in a gap 3. This gap 3 is the air bubble between the transparent printing layer 1 and the upper film layer 2.

[0030] Based on the above, this application provides a display panel, such as... Figure 2 As shown, Figure 2 This application provides a schematic diagram of the structure of a display panel, which includes a substrate 100, a plurality of light-emitting elements 200, and an encapsulation structure 300. The plurality of light-emitting elements 200 are located on one side of the substrate 100, and the encapsulation structure 300 includes a transparent encapsulation layer 310, which is located on the side of the plurality of light-emitting elements 200 away from the substrate 100 and covers the light-emitting elements 200.

[0031] It should be noted that, Figure 2 In this context, "502" represents a side encapsulation layer (e.g., transparent filler) for the display panel, disposed on the side between the front and back sides of the display panel. It covers at least the side of the second portion 314 of the transparent encapsulation layer 310 and the side traces 506 of the display panel, thus achieving side encapsulation of the display panel. "504" represents a side electrostatic conductive layer (e.g., low-resistivity ink), covering the outer side of the side encapsulation layer 502 and extending to the back side of the substrate 100. It surrounds the metal connection pads 512, ground terminal 514, side traces, etc., located on the back side of the display panel, thus eliminating (or rather, conducting) static electricity. Electrostatic discharge (ESD); "506" and "508" represent side traces, typically located in the non-display area of ​​the display panel and inside the side encapsulation layer 502, covered by it; "510" and "512" represent the metal connection pads on the front and back sides of the substrate 100, respectively, also known as metal connection pads; "514" represents the ground terminal, located on the back side of the substrate 100; "600" can represent the display-side glass cover, covering the transparent encapsulation layer 310 and the side encapsulation layer 502, with the electrostatic conduction layer 504 covering the side of the glass cover 600. If the above reference numerals appear in the following figures, they represent the same meaning and will not be repeated. It should be understood that... Figure 2 The display panels shown in the accompanying drawings below include the aforementioned structures 502, 504, 506, 508, 510, 512, and 514. These are merely illustrative examples of the structure of the display panels described in this application and are not intended to limit the structure of the display panels. The specific structure should be determined according to the circumstances.

[0032] The transparent encapsulation layer 310 includes a first portion 312 and a second portion 314. At least a portion of the second portion 314 is located in the edge region of the transparent encapsulation layer 310 and at least a portion surrounds the first portion 312. Specifically, at least a portion of the second portion 314 is located in the edge region of the transparent encapsulation layer 310, and at least a portion of the edge region of the transparent encapsulation layer 310 surrounds the first portion 312. Along a first direction, the thickness of the region of the transparent encapsulation layer 310 including the second portion 314 is not less than the thickness of the central region of the transparent encapsulation layer 310. This can also be understood as the thickness of the transparent encapsulation layer 310 corresponding to the second portion 314 being not less than the thickness of the central region of the transparent encapsulation layer 310. In other words, the thickness of the transparent encapsulation layer 310 in the region where the second portion 314 is located is not less than the thickness of the central region of the transparent encapsulation layer 310. The first direction is perpendicular to the plane of the display panel, that is, the first direction is perpendicular to the plane of each film layer (e.g., substrate, transparent encapsulation layer, etc.) in the display panel.

[0033] It should be noted that the central region of the aforementioned transparent encapsulation layer 310 includes the geometric center of the transparent encapsulation layer 310, with the edge region surrounding the central region. The geometric center of the first part 312 coincides with the center of the transparent encapsulation layer 310, or their geometric centers are close to each other. Furthermore, the aforementioned central region can be the region where the first part 312 is located, or the region where the surface tilt of the first part 312 meets the requirements. It should also be noted that the region in the aforementioned transparent encapsulation layer 310 that includes the second part 314 can include only the second part 314, in which case the thickness of the transparent encapsulation layer 310 including the second part 314 is the thickness of the second part 314; or it can include both the first part 312 and the second part 314, in which case the thickness of the transparent encapsulation layer 310 including the second part 314 is the sum of the thicknesses of the first part 312 and the second part 314. Similarly, the thickness of the central region of the transparent encapsulation layer 310 can be the thickness of the first part 312, or it can be the sum of the thicknesses of the first part 312 and the second part 314.

[0034] The first portion 312 of the aforementioned transparent encapsulation layer 310 can be understood as the transparent printing layer described in the background section. Therefore, the first portion 312 will also have a larger edge tilt due to edge flow, that is, the thickness of the area near the end of the first portion 312 becomes smaller, and the surface tilts downward. In other words, if the aforementioned transparent encapsulation layer 310 only includes the first portion 312, then the surface of the edge area of ​​the transparent encapsulation layer 310 tilts downward, and the tilt is greater closer to the edge area. However, in the display panel provided in this application, the transparent encapsulation layer 310 also includes a second portion 314, at least a portion of which is located in the edge area of ​​the transparent encapsulation layer 310 and surrounds the first portion 312. Furthermore, along the first direction, the thickness of the transparent encapsulation layer 310 corresponding to the second portion 314 is not less than the thickness of the central area of ​​the transparent encapsulation layer 310. Therefore, the transparent encapsulation layer 310 can effectively solve the problem of the downward tilt of the edge surface of the transparent encapsulation layer 310 caused by the first part 312 by utilizing the second part 314, so that all parts of the transparent encapsulation layer 310 on the side away from the substrate 100 are on the same horizontal plane relative to the plane where the substrate 100 is located, thus suppressing the tilt of the edge surface of the transparent encapsulation layer 310 as much as possible. Therefore, the display panel can effectively solve the problem of the large tilt angle of the edge surface of the transparent encapsulation layer 310, and also effectively solve the problem of air bubbles between the transparent encapsulation layer 310 and the upper film layer caused by the large tilt angle of the edge surface of the transparent encapsulation layer 310, thereby improving the display effect and yield of the display panel.

[0035] In one embodiment of this application, such as Figure 3 As shown, Figure 3 This application provides a schematic diagram of a display panel structure. The display panel typically includes a display area AA and a non-display area NA. The non-display area NA is located around the display area AA, typically surrounding it. Light-emitting elements 200 are located within the display area AA. At least a portion of the plurality of light-emitting elements 200 is covered by a first portion 312. A second portion 314 is located at the edge region of a transparent encapsulation layer 310, and is connected to and surrounds the first portion 312. Specifically, along a first direction, the distance between the side of the second portion 314 away from the substrate 100 and the substrate 100 is greater than the distance between the side of the light-emitting element 200 away from the substrate 100 and the substrate 100; that is, the side of the second portion 314 away from the substrate 100 extends beyond the side of the light-emitting element 200 away from the substrate 100. Therefore, the second portion 314 surrounds the first portion 312, and the side of the second portion 314 away from the substrate 100 is higher than the side of the light-emitting element 200 away from the substrate 100.

[0036] As described above, the second portion 314 is located in the edge region of the transparent encapsulation layer 310. Simultaneously, the second portion 314 is connected to and surrounds the first portion 312. That is, the transparent encapsulation layer 310 includes the first portion 312 and the second portion 314 located in the edge region and surrounding the first portion 312. Since the side of the second portion 314 furthest from the substrate 100 is higher than the side of the light-emitting element 200 furthest from the substrate 100, when forming the transparent encapsulation layer 310, the second portion 314 located in the edge region of the transparent encapsulation layer 310 can be formed first, and then the first portion 312 can be formed within the area enclosed by the second portion 314. The second portion 314 can act as a blocking structure for the first portion 312, suppressing the edge flow phenomenon of the first portion 312. This effectively solves the problem of a large edge tilt angle of the transparent encapsulation layer 310 caused by the edge flow phenomenon of the first portion 312, as well as the problem of air bubbles between the transparent encapsulation layer 310 and the upper film layer, effectively improving the display effect and yield of the display panel.

[0037] In one embodiment of this application, the material of the first part 312 is a first transparent adhesive, and the material of the second part 314 is a second transparent adhesive. The viscosity of the second transparent adhesive in the second part 314 is higher than the viscosity of the first transparent adhesive in the first part 312, and the refractive index difference between the first and second transparent adhesives is less than a preset value.

[0038] It should be noted that the viscosity of the second transparent adhesive in the second part 314 is higher than that of the first transparent adhesive in the first part 312. Therefore, the material of the second part 314 is a higher viscosity material, which is easier to shape and can more easily produce a second part 314 that meets the shape requirements. Therefore, in the process of forming the transparent encapsulation layer 310, the second part 314 of the preset shape can be formed first as a blocking structure for the first part 312 to suppress the edge flow phenomenon of the first part 312. Furthermore, the material of the second part 314 has a higher viscosity and is easier to shape, unlike the material of the first part 312, which is prone to edge flow and thus results in a large edge tilt angle. Therefore, the second part 314 can not only block the flow of the first part 312, but also prevent itself from having a large edge tilt angle. This can suppress the problem of large edge tilt angles of the first part 312 and the second part 314, that is, it can suppress the problem of large edge tilt angles of the transparent encapsulation layer 310 as a whole, as well as the problem of air bubbles between the edge of the transparent encapsulation layer 310 and the upper film layer, thereby improving the display effect and yield of the display panel.

[0039] Furthermore, as described above, the refractive index difference between the first and second transparent adhesives is less than a preset value. Consequently, the refractive index difference between the first portion 312 and the second portion 314 can also be less than the preset value, so that the refractive indices of the first portion 312 and the second portion 314 are as close as possible. Therefore, the visual difference caused by the difference in refractive indices of the first portion 312 and the second portion 314 can be suppressed as much as possible. This solves the problems of a large edge tilt angle of the transparent encapsulation layer 310 and air bubbles between it and the upper film layer, while ensuring the display effect of the display panel.

[0040] In one embodiment of this application, such as Figure 3 As shown, along the first direction, the projection of the first portion 312 covers the projection of the area where multiple light-emitting elements 200 are located, that is, the first portion 312 covers multiple light-emitting elements 200. Furthermore, along the first direction, the projection of the second portion 314 does not overlap with the projection of the area where the light-emitting elements 200 are located. In other words, the first portion 312 of the transparent encapsulation layer 310 covers the light-emitting elements 200, and the second portion 314 acts as a barrier to the first portion 312. However, it does not correspond to the area where the light-emitting elements 200 are located, that is, it is not located in the display area AA of the display panel, but in the non-display area NA. Therefore, the portion of the transparent encapsulation layer 310 corresponding to the display area AA only includes the first portion 312. Due to the difference in refractive index between the first portion 312 and the second portion 314, although it can be minimized as much as possible through material selection, it is difficult to achieve uniformity. Therefore, when both the first portion 312 and the second portion 314 are used for display, there are still differences in display effect. Therefore, in this embodiment, while solving the problem of a large edge tilt angle of the transparent encapsulation layer 310 and the bubble problem between it and the upper film layer, the display consistency of the display area AA is also ensured, thereby guaranteeing the display effect of the display panel.

[0041] In one embodiment of this application, such as Figure 4 As shown, Figure 4This application provides a schematic diagram of a display panel structure. Along a first direction, the projection of the first portion 312 covers a portion of the projection of the area containing multiple light-emitting elements 200, meaning the first portion 312 covers a portion of the multiple light-emitting elements 200. Furthermore, along the first direction, the projection of the second portion 314 covers the remaining portion of the projection of the area containing the multiple light-emitting elements 200, meaning the remaining portion of the multiple light-emitting elements 200 is covered by the second portion 314. In other words, along the first direction, the first portion 312 and the second portion 314 jointly cover the multiple light-emitting elements 200. Therefore, a portion of the display area AA of the display panel can be used to set the second portion 314 of the transparent encapsulation layer 310, thereby reducing the space in the non-display area NA of the display panel used to set the second portion 314, reducing the area of ​​the non-display area NA, and thus increasing the proportion of the display area AA in the display panel, which helps to achieve a narrow bezel or zero bezel in the display panel. It should be noted that the aforementioned narrow bezel refers to a very small proportion of the non-display area NA in the display panel, while a zero bezel refers to a further reduction in the proportion of the non-display area NA in the display panel, which can be considered as a zero bezel.

[0042] In one embodiment of this application, such as Figure 4 As shown, along the first direction, at least a portion of the projection of the second portion 314 lies within the projection of the area where the light-emitting element 200 is located. Specifically, in one embodiment of this application, along the first direction, the first portion 312 and the second portion 314 together cover the light-emitting element 200, and a portion of the projection of the second portion 314 along the first direction lies within the projection of the area where the light-emitting element 200 is located, so that the second portion 314 can be disposed as much as possible in the display area AA and as little as possible in the non-display area NA, thereby further reducing the space in the non-display area NA of the display panel used to dispose of the second portion 314, and achieving a narrow bezel or zero bezel for the display panel.

[0043] In addition, the display area AA of the display panel includes both the area corresponding to the first part 312 and the area corresponding to the second part 314. That is, the non-display area NA of the display panel other than the display area AA can use less space to set the second part 314, so that the display panel can have more space to set other components.

[0044] In one embodiment of this application, such as Figure 5 As shown, Figure 5This is a schematic diagram of a display panel provided in this application. The display panel further includes a light-shielding layer 400. The light-shielding layer 400 and the light-emitting element 200 are located on the same side of the substrate 100, and the light-shielding layer 400 covers the portion of the light-emitting element 200 except for its light-emitting side. The light-emitting side of the light-emitting element 200 is the side away from the substrate 100. The first portion 312 and the second portion 314 are located on the side of the light-shielding layer 400 away from the substrate 100. Along the first direction, the thickness H2 of the second portion 314 is not less than the thickness H1 of the first portion 312, and the first portion 312 and the second portion 314 are flush with the side away from the substrate. Therefore, the transparent encapsulation layer 310 can be located on the side of the light-shielding layer 400 away from the substrate 100, covering the light-emitting element 200. In the first direction, the thickness of the second part 314 of the transparent encapsulation layer 310 is not less than the thickness of the first part 312, so that the second part 314 is not lower than the first part 312, blocking the flow of the first part 312. This can effectively solve the problems of the large edge tilt angle of the first part 312 and the presence of air bubbles between the edge of the first part 312 and the upper film layer, thereby improving the yield of the display panel.

[0045] It should be noted that, along the first direction, the thickness H2 of the second portion 314 is not less than the thickness H1 of the first portion 312; typically, the thickness H2 of the second portion 314 is equal to the thickness H1 of the first portion 312. This is to ensure that the second portion 314 can block the flow from the edge of the first portion 312, and also to ensure that the sides of the first portion 312 and the second portion 314 away from the substrate 100 are at the same horizontal level relative to the plane of the substrate 100. This effectively solves the problem of the transparent encapsulation layer 310's surface tilting downwards on the side away from the substrate 100.

[0046] It should also be noted that the surface of the lower film layer (e.g., the light-shielding layer 400) of the transparent encapsulation layer 310 is generally considered to be on the same horizontal plane relative to the plane of the substrate 100. Therefore, the thicknesses of the second portion 314 and the first portion 312 are equal, which allows the side of the transparent encapsulation layer 310 away from the substrate 100 to be on the same horizontal plane. However, if the surface of the lower film layer of the transparent encapsulation layer 310 is not on the same horizontal plane, but rather, as with the transparent encapsulation layer described in related art, the surface near its edge slopes downwards, then the thickness H2 of the second portion 314 is greater than the thickness H1 of the first portion 312, so that the surface of the side of the transparent encapsulation layer 310 away from the substrate 100 is on the same horizontal plane. However, it should also be understood that if the surface of the lower film layer of the transparent encapsulation layer 310 near its edge slopes upwards, then the thickness H2 of the second portion 314 is less than the thickness H1 of the first portion 312.

[0047] In one embodiment of this application, such as Figure 6 As shown, Figure 6 This application provides a schematic diagram of a display panel structure. The display panel typically includes a display area AA and a non-display area NA. The non-display area NA is located around the display area AA, typically surrounding it. Light-emitting elements 200 are located in the display area AA. At least a portion of the plurality of light-emitting elements 200 is covered by a first portion 312, and a second portion 314 is located on the side of the first portion 312 away from the substrate 100, with at least a portion of the second portion 314 covering the first portion 312. That is, the transparent encapsulation layer 310 may include a stacked first portion 312 and a second portion 314, with at least a portion of the second portion 314 covering the first portion 312, and at least a portion of the plurality of light-emitting elements 200 being covered by the first portion 312.

[0048] The second part 314 includes a first sub-part 316 and a second sub-part 318. The second sub-part 318 is located around the first sub-part 316 and can surround the first sub-part 316, thus also surrounding the first part 312. Specifically, along the first direction, the thickness H4 of the second sub-part 318 is greater than the thickness H3 of the first sub-part 316, and the distance between the side of the second sub-part 318 facing the substrate 100 and the substrate 100 is less than the distance between the side of the first sub-part 316 facing the substrate 100 and the substrate 100. That is, the thickness of the second sub-part 318 can be greater than the thickness of the first sub-part 316, and in the direction facing the substrate 100, the side of the second sub-part 318 facing the substrate 100 is higher than the side of the first sub-part 316 facing the substrate 100.

[0049] As described above, the first portion 312 experiences edge flow, resulting in a reduced thickness near the edge and a sloping surface in that area. In this embodiment, the second portion 314 is located on the side of the first portion 312 away from the substrate 100, and a second sub-portion 318 of the edge region of the second portion 314 can surround the first portion 312. Since the second sub-portion 318 is thicker than the first sub-portion 316, and on the side of the second portion 314 facing the substrate 100, the second sub-portion 318 is higher than the first sub-portion 316. Therefore, in the display panel described in this embodiment, the second sub-portion 318 of the second portion 314 can compensate for the thickness of the edge region of the first portion 312. Since the side of the second sub-part 318 facing the substrate 100 is higher than the side of the first sub-part 316 facing the substrate 100, the second part 314 can compensate for the thickness of the edge region of the first part 312 while keeping the side of the transparent encapsulation layer 310 away from the substrate 100 horizontal relative to the plane of the substrate 100. This minimizes the surface tilt of the edge region of the transparent encapsulation layer 310, thereby effectively solving the problem of a large edge tilt angle of the transparent encapsulation layer 310. It also effectively solves the problem of air bubbles between the transparent encapsulation layer 310 and the upper film layer caused by the large edge tilt angle of the transparent encapsulation layer 310, thus improving the display effect and yield of the display panel.

[0050] In one embodiment of this application, such as Figure 6 As shown, along the first direction, the projection of the first sub-part 316 lies within the projection of the first part 312, and at least a portion of the projection of the second sub-part 318 lies within the projection of the first part 312. That is, the first sub-part 316 and the second sub-part 318 together cover the side of the first part 312 away from the substrate 100. It is known that the second sub-part 318 is located in the edge region of the first sub-part 316, so that the second sub-part 318 can also correspond to the edge region of the first part 312, that is, the region of the surface tilt caused by edge flow of the first part 312. This allows for compensation of the thickness of the edge region of the first part 312, so that the side of the transparent encapsulation layer 310 away from the substrate 100 remains horizontal relative to the plane of the substrate 100 as much as possible.

[0051] In one embodiment of this application, such as Figure 6As shown, along the first direction, the projection of the first portion 312 covers the projection of the area where the multiple light-emitting elements 200 are located, and the projection of the first sub-portion 316 covers the projection of the area where the multiple light-emitting elements 200 are located. That is, the first portion 312 and the first sub-portion 316 of the second portion 314 correspond to the display area AA of the display panel, while the second sub-portion 318, which compensates for the thickness of the edge area of ​​the first portion 312, is located in the non-display area NA of the display panel. Thus, the inclined surface area of ​​the first portion 312 and the second sub-portion 318 are located in the non-display area NA of the display panel. In other words, the area where the second sub-portion 318 is in contact with the inclined surface of the first portion 312 is located in the non-display area NA of the display panel. This allows the transparent encapsulation layer 310 to remain horizontal on the side away from the substrate 100, while avoiding the display effect of the display panel being affected by the area where the second sub-portion 318 is in contact with the inclined surface of the first portion 312 being located in the display area AA.

[0052] In one embodiment of this application, such as Figure 7 As shown, Figure 7 This application provides a schematic diagram of a display panel structure. Along a first direction, the projection of the first sub-part 316 lies within the projection of the area where the plurality of light-emitting elements 200 are located, and at least a portion of the projection of the second sub-part 318 lies within the projection of the area where the plurality of light-emitting elements 200 are located. That is, the first sub-part 316 is located in the display area, and at least a portion of the second sub-part 318 is located within the display area AA. In other words, along the first direction, both the first sub-part 316 and the second sub-part 318 of the second part 314 correspond to the display area AA of the display panel. Compared to the aforementioned embodiments, this embodiment can increase the proportion of the display area AA in the display panel, thereby contributing to the achievement of narrow bezels and zero bezels.

[0053] It should be noted that the above embodiment is described using the example of the first part 312 covering multiple light-emitting elements 200, but this application does not limit this. The first part 312 may also cover some of the light-emitting elements 200, in which case at least part of the second sub-part 318 covers the remaining light-emitting elements 200, such as... Figure 8 As shown. However, it should be noted that it is still required that the second sub-part 318 of the second part 314 can perform thickness compensation on the edge region of the first part 312.

[0054] In one embodiment of this application, such as Figure 9 As shown, Figure 9This application provides a schematic diagram of the structure of a display panel. Along a first direction, the distance between the area of ​​the second sub-part 318 relative to the first part 312 and the substrate 100 gradually decreases along the direction away from the first sub-part 316. That is, the thickness H3 of the area of ​​the second sub-part 318 corresponding to the first part 312 gradually increases along the direction away from the first sub-part 316. In other words, the thickness H3 of the area of ​​the second sub-part 318 located on the side of the first part 312 away from the substrate 100 gradually increases along the direction away from the first sub-part 316. This allows the thickness variation trend of the area of ​​the second sub-part 318 relative to the first part 312 to match the thickness variation area of ​​the edge area of ​​the first part 312, thereby achieving better fit between the area of ​​the second sub-part 318 corresponding to the first part 312 and the inclined edge of the first part 312.

[0055] In addition, such as Figure 10 and Figure 11 As shown, the first portion 312 covers part of the light-emitting element 200, and the first portion 312 covers all of the light-emitting elements 200. The second sub-portion 318 may also include a region that does not correspond to the first portion 312. The thickness H4 of the region in the second sub-portion 318 that does not correspond to the first portion 312 may no longer vary according to the surface inclination of the edge region of the first portion 312, but only covers the underlying film layer and / or structure, and ensures that the side of the transparent encapsulation layer 310 away from the substrate 100 is horizontal relative to the plane of the substrate 100. Therefore, the second sub-portion 318, which ensures that the side of the transparent encapsulation layer 310 away from the substrate 100 is horizontal relative to the plane of the substrate 100, can also achieve the fixation of the film layers on the upper and lower sides of the display panel and the structural support of the display panel.

[0056] This application also provides a display device, such as... Figure 12 As shown, Figure 12 This is a schematic diagram of the structure of the display device, which includes the display panel 001 described in any of the above embodiments.

[0057] This application also provides a splicing display device, such as... Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of the splicing display device. The display device 001 includes the display panel 01 described in any of the above embodiments, and is formed by splicing the display panels 01 described in any of the above embodiments. It should be noted that the splicing display device 001 does not limit the number of display panels 01 spliced ​​together, but depends on the specific situation.

[0058] In summary, this application provides a display panel, a display device, and a splicing display device. The display panel includes a substrate, a light-emitting element located on one side of the substrate, and an encapsulation structure. The encapsulation structure includes a transparent encapsulation layer located on the side of the light-emitting element away from the substrate and covering the light-emitting element. The transparent encapsulation layer has a first portion and a second portion, with at least a portion of the second portion located at the edge region of the transparent encapsulation layer and at least a portion surrounding the first portion. Along a first direction, which is perpendicular to the plane of the display panel, the thickness of the region of the transparent encapsulation layer including the second portion is not less than the thickness of the central region of the transparent encapsulation layer. Therefore, this display panel can effectively solve the problem of the edge surface of the transparent encapsulation layer tilting downwards caused by the first portion by utilizing the second portion, so that all parts of the transparent encapsulation layer on the side away from the substrate are on the same horizontal plane relative to the plane of the substrate, suppressing the tilt of the edge surface of the transparent encapsulation layer as much as possible, effectively solving the problem of a large tilt angle of the edge surface of the transparent encapsulation layer, and improving the display effect and yield of the display panel.

[0059] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on the differences from other embodiments, and similar or identical areas between embodiments can be referred to mutually.

[0060] It should be noted that, in the description of this application, the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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 of this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0061] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, include: substrate; Multiple light-emitting elements located on one side of the substrate; The packaging structure includes a transparent packaging layer located on the side of the plurality of light-emitting elements away from the substrate, covering the light-emitting elements; The transparent encapsulation layer includes a first part and a second part, wherein at least a portion of the second part is located in the edge region of the transparent encapsulation layer and at least a portion surrounds the first part; Along the first direction, the thickness of the region including the second part in the transparent encapsulation layer is not less than the thickness of the central region of the transparent encapsulation layer, and the first direction is perpendicular to the plane where the display panel is located.

2. The display panel according to claim 1, characterized in that, The plurality of light-emitting elements are located in the display area of ​​the display panel, and at least a portion of the plurality of light-emitting elements is covered by the first portion. The second portion is located in the edge area of ​​the transparent encapsulation layer, connected to the first portion, and surrounding the first portion. In this case, along the first direction, the side of the second portion away from the substrate is higher than the side of the light-emitting elements away from the substrate.

3. The display panel according to claim 2, characterized in that, The material of the first part is a first transparent adhesive, and the material of the second part is a second transparent adhesive; The viscosity of the second transparent adhesive is higher than that of the first transparent adhesive, and the difference in refractive index between the first transparent adhesive and the second transparent adhesive is less than a preset value.

4. The display panel according to claim 2, characterized in that, Along the first direction, the projection of the first part covers the projection of the area where the plurality of light-emitting elements are located, and the projection of the second part does not overlap with the projection of the area where the plurality of light-emitting elements are located.

5. The display panel according to claim 2, characterized in that, Along the first direction, the projection of the first portion covers a portion of the projection of the region where the plurality of light-emitting elements are located, and the projection of the second portion covers the remaining portion of the projection of the region where the plurality of light-emitting elements are located.

6. The display panel according to claim 5, characterized in that, Along the first direction, at least a portion of the projection of the second part lies within the projection of the region where the light-emitting element is located.

7. The display panel according to any one of claims 2-6, characterized in that, The display panel further includes a light-shielding layer, which is located on the same side of the substrate as the light-emitting element, and the light-shielding layer covers the portion of the light-emitting element except for the light-emitting side, wherein the light-emitting side of the light-emitting element is the side away from the substrate; The first portion and the second portion are located on the side of the light-shielding layer away from the substrate, and along the first direction, the thickness of the second portion is not less than the thickness of the first portion, and the second portion and the first portion are flush with the side of the first portion away from the substrate.

8. The display panel according to claim 1, characterized in that, The light-emitting element is located in the display area of ​​the display panel, at least a portion of the plurality of light-emitting elements is covered by the first portion, and the second portion is located on the side of the first portion away from the substrate; The second part includes a first sub-part and a second sub-part, the second sub-part being located around the first sub-part, and at least a portion of the second sub-part being located on the side of the first part away from the substrate; wherein, along the first direction, the thickness of the second sub-part is greater than the thickness of the first sub-part, and the side of the second sub-part facing the substrate is higher than the side of the first sub-part facing the substrate.

9. The display panel according to claim 8, characterized in that, Along the first direction, the projection of the first sub-part lies within the projection of the first part, and at least a portion of the projection of the second sub-part lies within the projection of the first part.

10. The display panel according to claim 8, characterized in that, Along the first direction, the projection of the first portion covers the projection of the region where the plurality of light-emitting elements are located, and the projection of the first sub-portion covers the projection of the region where the plurality of light-emitting elements are located.

11. The display panel according to claim 8, characterized in that, Along the first direction, the projection of the first sub-part lies within the projection of the region where the plurality of light-emitting elements are located, and at least a portion of the projection of the second sub-part lies within the projection of the region where the plurality of light-emitting elements are located.

12. The display panel according to claim 8, characterized in that, Along the first direction, the distance between the region of the second sub-part corresponding to the first part and the substrate on the side facing the substrate gradually decreases along the direction away from the first sub-part.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 1-12.

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