Cover plate, display panel and display device

Abstract

The application provides a cover plate, a display panel and a display device, and relates to the technical field of display. The cover plate is used for covering a display screen module and has an inner surface facing the display screen module and an outer surface away from the display screen module. The cover plate comprises a planar part and a side surface part arranged at the edge of the planar part. The side surface part is located in the circumferential direction of the planar part and comprises at least a partial curved surface. The curved surface comprises a first edge connected with the planar part and a second edge opposite to the first edge. At least one of the first edge and the second edge is provided with a limiting boss protruding from the inner surface on the inner surface. The limiting boss extends in the circumferential direction of the planar part. In this way, the corresponding display screen module is attached to the corresponding planar part or side surface part, and does not exceed the preset attachment area, thereby improving the attachment precision between the display screen module and the cover plate.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a cover plate, a display panel, and a display device having the display panel. Background Technology

[0002] With the development of display technology, flexible displays are widely used in various electronic terminal products. Furthermore, based on market demand, their application has expanded from flat displays to side-mounted displays, such as dual-curved and quad-curved displays. This not only increases the screen-to-body ratio but also expands display applications, such as adding specific functional areas to the sides. However, this display method increases the difficulty of manufacturing the display panel. Specifically, the bonding process between a curved display and a cover plate is relatively more difficult than that between a non-curved display (circular screen) and a cover plate. Additionally, issues have arisen regarding the poor bonding precision between the display, especially the curved portion, and the cover plate.

[0003] Therefore, there is an urgent need to propose a technical solution to improve the bonding accuracy between curved displays and cover plates. Summary of the Invention

[0004] A first aspect of this application provides a cover plate for fitting onto a display module. The cover plate has an inner surface facing the display module and an outer surface away from the display module. The cover plate includes a planar portion and a side portion disposed at the edge of the planar portion. The side portion is located in the circumferential direction of the planar portion and includes at least a partially curved surface. The curved surface includes a first edge connected to the planar portion and a second edge opposite to the first edge. On the inner surface, at least one of the first edge and the second edge is provided with a limiting boss protruding from the inner surface, and the limiting boss extends in the circumferential direction of the planar portion.

[0005] In the above solution, the design of setting a limiting boss on at least one edge of the side part of the cover plate can form a limit on the boundary between the flat part and the side part of the cover plate, so that the display module can be attached to the corresponding flat part or side part according to the limit, thereby improving the bonding accuracy between the display module and the cover plate.

[0006] In conjunction with the first aspect, in some embodiments, the limiting boss is continuously disposed on the first edge and / or the second edge and surrounds the planar portion. Further, the shape of the orthographic projection of the limiting boss onto the plane containing the planar portion is a closed loop.

[0007] In the above solution, the design of setting the limiting boss on the first edge and / or surrounding the planar portion can effectively define the side attachment area corresponding to the side portion, separating it from the planar attachment area corresponding to the planar portion of the cover plate. This effectively prevents the part corresponding to the display module from entering the planar portion when it is attached to the side portion, effectively limiting the part of the display module that is attached to the side portion of the cover plate, thereby effectively improving the bonding accuracy between the display module and the cover plate.

[0008] In conjunction with the first aspect, in some embodiments, the limiting boss includes a plurality of sub-limiting bosses, and the plurality of sub-limiting bosses are arranged at circumferential intervals along the planar portion. Further, the spacing between adjacent sub-limiting bosses is equal.

[0009] In the above scheme, the design of setting the limiting boss on the edge of the side of the cover plate with multiple sub-limiting bosses can achieve more precise limiting of the corresponding area of ​​the display module attached to the cover plate, thereby more effectively improving the attachment accuracy between the cover plate and the display module.

[0010] In conjunction with the first aspect, in some embodiments, a sub-limiting boss is provided on the first edge, or a sub-limiting boss is provided on the second edge.

[0011] In conjunction with the first aspect, in some embodiments, a sub-limiting boss is provided on the first edge, and a sub-limiting boss is provided on the second edge. Further, the sub-limiting bosses on the first edge and the sub-limiting bosses on the second edge are correspondingly arranged and / or spaced apart and / or staggered.

[0012] In the above scheme, the design of setting sub-limiting bosses on the first and second edges of the side circumferential direction effectively improves the attachment accuracy of the display module and the cover plate.

[0013] In conjunction with the first aspect, in some embodiments, the surface of the limiting boss is curved, and the curved surface smoothly connects with the corresponding flat portion and side portion. Furthermore, the limiting boss is integrally formed with the cover plate.

[0014] In the above solution, the limiting boss is set to smoothly connect with the inner surface of the cover plate, which reduces the probability of stress concentration between the cover plate and the limiting boss, reduces the risk of cracks at the connection between the two, and thus improves the quality of the cover plate.

[0015] In conjunction with the first aspect, in some embodiments, when both the first edge and the second edge are provided with limiting bosses, the curvature of the arc surface of the limiting boss located on the first edge is equal to the curvature of the arc surface of the limiting boss located on the second edge.

[0016] In the above scheme, the limiting bosses on different edges of the cover plate are designed to have the same curvature, which facilitates the processing of the limiting bosses on different edges and saves the production cost of the cover plate.

[0017] In conjunction with the first aspect, in some embodiments, the outer contour of the side portion is conical, and / or the outer contour of the planar portion is circular. Furthermore, the cover plate as a whole has a bowl-shaped structure.

[0018] In the above scheme, the flat part and the side part of the cover plate are designed to be smoothly connected, which reduces the stress concentrated at the junction of the flat part and the side part and improves the quality of the cover plate.

[0019] A second aspect of this application provides a display panel, the display device including a cover plate and a display module as described in any of the first aspects above. The display module is disposed on the inner surface of the planar portion and the inner surface of the side portion.

[0020] In conjunction with the second aspect, in some embodiments, the maximum distance from the surface of the limiting boss away from the side portion to the inner surface of the side portion is greater than the distance from the surface of the display module away from the side portion to the inner surface of the side portion.

[0021] In the above solution, the limitation on the relationship between the maximum distance between the limiting boss and the inner surface of the side part and the distance between the display module and the inner surface of the side part means that the depth of the side attachment area of ​​the side part is greater than the thickness of the display module, which more effectively achieves the limitation of the display module.

[0022] A third aspect of this application provides a display device that includes a display panel according to any of the second aspects described above. Attached Figure Description

[0023] Figure 1 The image shown is a perspective view of a cover plate provided in an exemplary embodiment of this application.

[0024] Figure 2 The image shown is for this application. Figure 1 Enlarged view of point A in one structure of the middle cover plate.

[0025] Figure 3 The image shown is for this application. Figure 1 Enlarged view of point A in another structure of the middle cover plate.

[0026] Figure 4 The image shown is for this application. Figure 1 Enlarged view of point A in another structure of the middle cover plate.

[0027] Figure 5 The image shown is for this application. Figure 1 Enlarged view of point A in another structure of the middle cover plate.

[0028] Figure 6 The image shown is for this application. Figure 1 Enlarged view of point A in another structure of the middle cover plate.

[0029] Figure 7 The image shown is for this application. Figure 4 Enlarged view of point A in another structure of the middle cover plate.

[0030] Figure 8 The image shown is for this application. Figure 4 Enlarged view of point A in another structure of the middle cover plate.

[0031] Figure 9 The image shown is for this application. Figure 4 Enlarged view of point A in another structure of the middle cover plate.

[0032] Figure 10 The image shown is an exploded view of a display module provided in an exemplary embodiment of this application.

[0033] Explanation of reference numerals in the attached figures

[0034] Cover Plate-10

[0035] Inner surface - S1; Outer surface - S2; Flat surface - A1; Side surface - A2;

[0036] First edge -11; Second edge -12;

[0037] Limiting boss-13; First limiting boss 13a; Second limiting boss 13b; Sub-limiting boss 131; First sub-limiting boss 131a; Second sub-limiting boss 131b;

[0038] Display module-20; main display unit AA1; side display unit AA2; limiting groove-21. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] With the development of display technology, flexible display panels, due to their numerous advantages such as bendability, foldability, high flexibility, thinness, lightness, and low power consumption, can be widely used in electronic devices such as smartphones and wearable products to enhance user experience. As user needs have evolved, flexible display panels have progressed from two-curved to four-curved displays, and now to circular 3D displays. This requires that the front of the flexible display panel can display (e.g., a circular display) and its sides can also display (e.g., a conical display) to improve the user's visual experience. A flexible display panel consists of a display module for display and a cover plate attached to the light-emitting side of the display module; the two are bonded together.

[0041] Specifically, the cover plate is generally located on the outermost layer of the display panel, used to protect the structural layer inside the display module. If the display module is designed to have the aforementioned 3D display effect, the cover plate will correspondingly be curved. Considering the physical structure of the cover plate, a circular display module cannot be directly bonded, as this would result in bonding wrinkles. To solve the problems encountered during the bonding process between the cover plate and the display module, the side display area of ​​the display module can be bonded separately. Specifically, a separate annular display module is used to form a conical side display area. During the bonding process, a contouring head is often used to lift the display module, allowing it to adhere to the inner surface of the cover plate, thus achieving bonding. Furthermore, a guide film is used to bend the display module and attach it to the surface of the contouring head. Because the screen is bonded to a conical surface in a ring shape, the magnitude and direction of the force applied to the guide film need to be constantly adjusted when pulling the guide film. Existing processes and equipment cannot easily achieve this, which increases the bonding difficulty of the display module. It is not only difficult to achieve a conical display area formed by the ring side, but also difficult to maintain a high bonding accuracy between the display module and the inner surface of the cover plate.

[0042] In view of this, this application provides a cover plate that, through structural design, improves the fitting accuracy between the annular side surface and the cover plate without affecting the conical display area formed by the annular side surface. The design scheme of this cover plate is described below.

[0043] Embodiments of this application provide a cover plate for fitting onto a display module. The cover plate has an inner surface facing the display module and an outer surface away from the display module. The cover plate includes a planar portion and a side portion disposed at the edge of the planar portion. The side portion is located in the circumferential direction of the planar portion and includes at least a partially curved surface. The curved surface includes a first edge connected to the planar portion and a second edge opposite to the first edge. On the inner surface, at least one of the first edge and the second edge is provided with a limiting boss protruding from the inner surface, and the limiting boss extends in the circumferential direction of the planar portion. Thus, the design of providing a limiting boss on at least one edge of the side portion of the cover plate can form a limiting at the boundary between the planar portion and the side portion of the cover plate, so that the corresponding display module is attached to the corresponding planar portion or side portion, improving the bonding accuracy between the display module and the cover plate.

[0044] For example, such as Figure 1 As shown, the cover plate 10 includes a planar portion A1 and a side portion A2 surrounding the planar portion A1. The planar portion A1 is circular or nearly circular in shape, and the side portion A2 is curved and surrounds the outer edge (the edge away from the center) of the circle. The side portion A2, which is entirely curved, includes a first edge 11 connected to the outer edge of the planar portion A1 and a second edge 12 disposed opposite to the first edge 11. The side portion A2 forms a cone-shaped display area, that is, the longitudinal cross-section of the side portion A2 is cone-shaped. Furthermore, the cover plate 10 is used to cover the display module 20. The side facing the display module 20 is the inner surface S1, and the exposed side is the outer surface S2 (also the side visible to the user). A limiting boss 13 is provided at the first edge 11 on the inner side of the cover plate 10. The limiting boss 13 separates the flat part A1 and the side part A2 of the cover plate 10. In this way, during the bonding process of the display module 20 corresponding to the side part A2 of the cover plate 10, the bonding area of ​​the display module 20 during the bonding process can be limited, so that it cannot enter the part of the flat part A1 near the first edge 11, thereby improving the bonding accuracy of the display module 20 on the side part A2 of the cover plate 10.

[0045] It should be understood that the above example is only a schematic diagram of a cover plate structure, and the cover plate can also be configured with other structures. For example, the side portion includes a partially curved surface located at the corner, which, together with the corresponding display module, forms a dual-curved or quad-curved display panel.

[0046] There are several ways to set protrusions on the side of the cover plate. The following is a detailed introduction to the distribution of limiting protrusions on the edge of the cover plate.

[0047] For example, in some embodiments, the limiting boss is continuously disposed on the first edge and / or the second edge and surrounds the planar portion. In at least one embodiment, the shape of the orthographic projection of the limiting boss onto the plane containing the planar portion is a closed loop.

[0048] For example, such as Figure 1 and Figure 2 As shown, the limiting protrusion 13 provided on the first edge 11 of the side portion A2 surrounding the outer edge of the planar portion A1 surrounds the planar portion A1 on the surface of the cover plate 10, and the shape of the limiting protrusion 13 on the surface of the planar portion A1 of the cover plate 10 is annular. This design of the limiting protrusion 13 surrounding the planar portion A1 helps to prevent the portion corresponding to the display module 20 from entering the planar portion A1 when it is attached to the side portion A2, thus limiting the portion of the display module 20 attached to the side portion A2 of the cover plate 10 (also known as the attachment area), thereby effectively improving the attachment accuracy between the display module 20 and the cover plate 10.

[0049] To clearly describe the design scheme based on setting the limiting boss as a continuous ring structure, this embodiment will now specifically introduce the design scheme where the limiting boss is located on different edges of the cover plate.

[0050] For example, such as Figure 2 As shown, a first limiting protrusion 13a is provided on the inner surface S1 of the cover plate 10 and on the first edge 11 where the side part A2 connects with the flat part A1. The first limiting protrusion 13a is annular around the outer edge of the flat part A1. In this way, the first limiting protrusion 13a separates the inner edge of the bonding area of ​​the side part A2 of the cover plate 10, so that the bonding area of ​​the display module 20 corresponding to the side part A2 is not easily bonded to the flat part A1 during the bonding process.

[0051] For example, such as Figure 3 As shown, a second limiting protrusion 13b is provided on the inner surface S1 of the cover plate 10 and on the second edge 12 of the side portion A2 away from the plane portion A1. The second limiting protrusion 13b is annular around the second edge 12 of the side portion A2. The orthographic projection of the second limiting protrusion 13b on the plane portion A1 surrounds the plane portion A1. In this way, the second limiting protrusion 13b defines the outer edge of the bonding area of ​​the side portion A2, so that the bonding area of ​​the display module 20 corresponding to the side portion A2 is not easy to move outside the area of ​​the cover plate 10 during the bonding process.

[0052] For example, such as Figure 4As shown, on the inner surface S1 of the cover plate 10, a first limiting protrusion 13a is provided on the first edge 11 (i.e., the inner edge) where the side part A2 intersects with the plane part A1, and a second limiting protrusion 13b is provided on the second edge 12 (i.e., the outer edge) where the side part A2 intersects with the first edge 11. In this way, the first limiting protrusion 13a and the second limiting protrusion 13b limit the inner edge and the outer edge of the bonding area where the display module 20 corresponding to the side part A2 of the cover plate 10 is bonded. This makes it difficult for the corresponding display module 20 to cross the first limiting protrusion 13a into the plane part A1 during the bonding process, and it is also difficult for it to cross the second limiting protrusion 13b into the outer edge of the cover plate 10, thereby effectively improving the bonding accuracy of the display module 20 to the cover plate 10.

[0053] Unlike the above design scheme that designs the limiting boss as a closed loop, the limiting boss can also be set with multiple spaced sub-limiting bosses, as shown in the following design scheme.

[0054] In some embodiments, the limiting boss includes a plurality of sub-limiting bosses, and the plurality of sub-limiting bosses are circumferentially spaced on the planar portion. In at least one embodiment, the side portion is curved, and the spacing between adjacent sub-limiting bosses is equal.

[0055] For example, such as Figure 5 As shown, the limiting boss 13 includes multiple sub-limiting bosses 131, and the multiple sub-limiting bosses 131 extend circumferentially on the planar portion A1 along a preset distribution rule (e.g., equally spaced intervals) on the first edge 11 of the side portion A2 of the cover plate 10. Thus, the design of providing the limiting boss 13 with multiple sub-limiting bosses 131 distributed on the edge of the side portion A2 of the cover plate 10 enables more precise limiting of the corresponding area of ​​the display module 20 attached to the cover plate 10, thereby more effectively improving the attachment accuracy between the cover plate 10 and the display module 20.

[0056] Based on the design scheme of setting the limiting boss to include multiple sub-limiting bosses, this embodiment will now describe in detail the design scheme of the sub-limiting bosses on the edge of the side part of the cover plate.

[0057] For example, in some embodiments, such as Figure 5 As shown, a first sub-limiting boss 131a is provided on the first edge 11 of the side portion A2 of the cover plate 10 that connects with the flat portion A1.

[0058] For example, in some embodiments, such as Figure 6 As shown, a second sub-limiting boss 131b is provided on the second edge 12 of the side portion A2 of the cover plate 10, which is opposite to the first edge 11.

[0059] For example, in some embodiments, such as Figure 7As shown, the first edge 11 of the side portion A2 of the cover plate 10 is provided with a first sub-limiting boss 131a, and the second edge 12, which is disposed opposite to the first edge 11, is provided with a second sub-limiting boss 131b.

[0060] Furthermore, based on the case where a first sub-limiting boss and a second sub-phase boss are simultaneously provided on the first edge and the second edge of the side portion, this embodiment also limits the relative positional relationship between the first sub-limiting boss and the second sub-limiting boss, as follows.

[0061] For example, in at least one embodiment, such as Figure 7 As shown, a first sub-limiting boss 131a on the first edge 11 and a second sub-phase boss on the second edge 12 are disposed opposite to each other. For example, in at least one embodiment, as Figure 8 As shown, the first sub-limiting boss 131a on the first edge 11 and the second sub-limiting boss 131b on the second edge 12 are spaced apart.

[0062] For example, in at least one embodiment, such as Figure 9 As shown, the first sub-limiting protrusion 131a on the first edge 11 and the second sub-limiting protrusion 131b on the second edge 12 are staggered. Furthermore, the relative positional relationship between the first sub-limiting protrusion 131a on the first edge 11 and the second sub-limiting protrusion 131b on the second edge 12 can be a combination of at least two of the above three methods (relative arrangement, spaced arrangement, and staggered arrangement), which will not be described in detail here.

[0063] In addition, such as Figures 7-9 As shown, the gap between adjacent first sub-limiting protrusions 131a is equal to the gap between adjacent second sub-limiting protrusions 131b. Thus, there are various design schemes for providing sub-limiting protrusions 131 on the first edge 11 and second edge 12 of the side portion A2 in the circumferential direction. This allows for the design of the relative positions of the sub-limiting protrusions 131 between different edges on the cover plate 10 according to different requirements of the display panel, improving the applicability of the design scheme of providing limiting protrusions 131 on the cover plate 10 to improve the attachment accuracy between the display module 20 and the cover plate 10.

[0064] It should be understood that this proposal only provides an illustrative design scheme for a limiting boss comprising multiple sub-limiting bosses disposed on a first edge and / or a second edge, and does not specifically limit the parameters between the sub-limiting bosses. For example, each of the aforementioned first sub-limiting bosses or each of the second sub-limiting bosses can be configured as a strip and / or a dot, and the parameters (e.g., length, shape, etc.) of each first sub-limiting boss or second sub-limiting boss can be the same or different. For example, the parameters (e.g., length, shape, spacing, etc.) of the first sub-limiting boss and the second sub-limiting boss can be the same or different. All of the above can be designed according to the requirements of the cover plate, and will not be elaborated here.

[0065] After introducing the relevant design schemes for the distribution of the limiting boss on the first edge and / or the second edge, this embodiment then defines the shape of the limiting boss.

[0066] In some embodiments, the surface of the limiting boss is curved, and the curved surface smoothly connects with the corresponding flat portion and side portion. By configuring the limiting boss to smoothly connect with the inner surface of the cover plate, the probability of stress concentration between the cover plate and the limiting boss is reduced, lowering the risk of cracks at the connection point and thus improving the quality of the cover plate.

[0067] For example, not only as Figures 1-3 As shown, in the design scheme where the limiting boss 13 is set as a closed loop surrounding the flat portion A1, the surface of the limiting boss 13 is set as an arc surface, and as... Figures 7-9 As shown, in the design scheme where the limiting boss 13 is configured to include multiple sub-limiting bosses 131, the surface of each sub-limiting boss 131, namely the first sub-limiting boss 131a and the second sub-limiting boss 131b, is also configured as an arc surface. Furthermore, the arc surface on the limiting boss 13 or sub-limiting boss 131 located on the first edge 11 allows the limiting boss 13 or sub-limiting boss 131 to smoothly connect with the flat portion A1 and the side portion A2, and the arc surface on the limiting boss 13 or sub-limiting boss 131 located on the second edge 12 allows the limiting boss 13 or sub-limiting boss 131 to smoothly connect with the side portion A2.

[0068] In at least one embodiment, the limiting boss 13 is integrally formed with the cover plate 10, and a groove is formed on the outer surface S2 of the cover plate 10 corresponding to the area of ​​the limiting boss 13. In at least one embodiment, after the limiting boss 13 is formed, an adhesive material can be coated on the surface of the limiting boss 13 to provide a certain cushioning effect when the limiting boss 13 is compressed. Specifically, the adhesive material coated on the limiting boss 13 may include, but is not limited to, polyurethane rubber (PU), silicone or thermoplastic polyurethane elastomer rubber (TPU), optical adhesive, etc.

[0069] It should be understood that the preparation of the limiting boss is not limited to the one-piece molding method in the above example. Other methods can also be used, such as processing it directly on the inner surface of the cover plate. This can be designed according to the process conditions of the cover plate, which will not be elaborated here.

[0070] In some embodiments, when both the first edge and the second edge are provided with limiting bosses, the curvature of the arc surface of the limiting boss on the first edge is equal to the curvature of the arc surface of the limiting boss on the second edge. Thus, by setting the limiting bosses on different edges of the cover plate to have the same curvature, it is easier to process the limiting bosses on different edges, saving on the production cost of the cover plate.

[0071] For example, such as Figure 1 As shown, in the design scheme where the limiting boss 13 is configured as a closed loop, the curvature of the arc surface of the first limiting boss 13a on the first edge 11 of the side portion A2 of the cover plate 10 is equal to the curvature of the arc surface of the second limiting boss 13b on the second edge 12 of the side portion A2. As described above... Figure 9 As shown, in the design scheme in which the limiting boss 13 is configured to include multiple sub-limiting bosses 131, the curvature of the arc surface of the first sub-limiting boss 131a located on the first edge 11 of the side portion A2 of the cover plate 10 is equal to the curvature of the arc surface of the second sub-limiting boss 131b located on the second edge 12 of the side portion A2.

[0072] It should be understood that the design scheme for providing limiting bosses on the first and second edges of the side of the cover plate is not limited to the schemes in the examples above. For example, the limiting boss on the first edge can be a closed loop, while the limiting boss on the second edge can include multiple sub-limiting bosses. Another example is that the limiting boss on the first edge can include multiple sub-limiting bosses, while the limiting boss on the second edge can be a closed loop. These can be designed according to the requirements of the cover plate, and will not be elaborated upon here.

[0073] In some embodiments, such as Figure 1 As shown, the planar portion A1 and the side portion A2 are inclined and smoothly connected, meaning that the surface containing the planar portion A1 and the surface containing the side portion A2 are not on the same plane, forming an angle between them. This angle can be any one of an obtuse angle, an acute angle, or a right angle. Thus, by designing the planar portion A1 and the side portion A2 of the cover plate 10 to be smoothly connected, the stress concentrated at the junction of the planar portion A1 and the side portion A2 is reduced, improving the quality of the cover plate 10. In at least one embodiment, as... Figure 1 As shown, the outer contour of the side portion A2 is conical, and the outer contour of the planar portion A1 is circular. In at least one embodiment, as... Figure 1 As shown, the cover plate 10 has an overall bowl-shaped structure.

[0074] It should be understood that the outer contour of the side panel is not limited to a conical shape; it can also be other shapes, such as a rectangle, paired with a flat panel with a similarly circular outer contour. Similarly, the outer contour of the flat panel is not limited to a circular shape; it can also be other shapes, such as a rectangle or triangle, paired with a side panel with a similarly conical outer contour. These can be designed according to the requirements of the cover plate, and will not be elaborated upon here.

[0075] Embodiments of this application also provide a display panel, such as... Figure 10 As shown, the display panel includes a cover plate 10 and a display module 20 as described in any of the above embodiments. The display module 20 includes a main display portion AA1 and a side display portion AA2 disposed on the outer edge of the main display portion AA1 and extending outward. The main display portion AA1 is attached to the inner surface S1 of the planar portion A1, and the side display portion AA2 is attached to the inner surface of the side portion A2. The display module 20 may be a flexible display module.

[0076] In some embodiments, the maximum distance between the surface of the limiting boss away from the side portion and the inner surface of the side portion is greater than the distance between the surface of the display module away from the side portion and the inner surface of the side portion.

[0077] For example, such as Figure 1 and Figure 10 As shown, limiting protrusions 13 are respectively provided on the first edge 11 and the second edge 12 of the cover plate 10. Furthermore, the maximum distance from the surface of the limiting protrusion 13 away from the side portion A2 to the inner surface S1 of the side portion A2 is greater than the distance from the surface of the flexible display module 20 away from the side portion A2 to the inner surface S1 of the side portion A2. Thus, limiting the relationship between the maximum distance of the limiting protrusion 13 away from the inner surface of the side portion A2 and the distance from the flexible display module 20 to the inner surface S1 of the side portion A2 effectively limits the depth of the side attachment area of ​​the side portion A2 to be greater than the thickness of the flexible display module 20, thereby more effectively limiting the flexible display module 20.

[0078] It should be understood that when a limiting boss is provided on the first edge or the second edge, the limiting boss can also be configured in the above manner, so that the maximum distance between the limiting boss and the inner surface of the side part is the same as the distance between the flexible display module and the inner surface of the side part. This will not be elaborated here.

[0079] This application also provides a display device, which includes any of the display panels described above. For example, the display device in the embodiments of this application can be any product or component with display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, or navigator.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cover plate for covering a display module, characterized in that, The cover plate has an inner surface facing the display module and an outer surface away from the display module, the cover plate comprising: Planar part; A side portion, disposed at the edge of the planar portion, the side portion being inclined to the planar portion, and in the circumferential direction of the planar portion, the side portion including at least a partially curved surface, wherein the curved surface includes a first edge connected to the planar portion and a second edge opposite to the first edge, the outer contour of the side portion being conical and / or the outer contour of the planar portion being circular; and A limiting boss is disposed on the inner surface, located on the first edge and the second edge respectively and protruding from the inner surface. The limiting boss extends in the circumferential direction of the planar portion. The surface of the limiting boss is an arc surface, which smoothly connects with the corresponding planar portion and the side portion. The curvature of the arc surface of the limiting boss located on the first edge is equal to the curvature of the arc surface of the limiting boss located on the second edge. The limiting boss located on the first edge defines the inner edge of the contact area of ​​the side portion, and the limiting boss located on the second edge defines the outer edge of the contact area of ​​the side portion, so as to physically separate the flat portion and the side portion and define different contact areas.

2. The cover plate according to claim 1, characterized in that, The limiting boss is continuously disposed on the first edge and the second edge and surrounds the planar portion.

3. The cover plate according to claim 2, characterized in that, The shape of the orthographic projection of the limiting boss onto the plane containing the planar portion is a closed loop.

4. The cover plate according to claim 1, characterized in that, The limiting boss includes multiple sub-limiting bosses, and the multiple sub-limiting bosses are arranged at circumferential intervals along the planar portion.

5. The cover plate according to claim 4, characterized in that, The spacing between adjacent sub-limiting bosses is equal.

6. The cover plate according to claim 5, characterized in that, The first edge is provided with the sub-limiting boss; or The second edge is provided with the sub-limiting boss.

7. The cover plate according to claim 5, characterized in that, The first edge is provided with the sub-limiting boss, and the second edge is provided with the sub-limiting boss.

8. The cover plate according to claim 7, characterized in that, The sub-limiting protrusions on the first edge are correspondingly set and / or spaced apart and / or staggered with the sub-limiting protrusions on the second edge.

9. The cover plate according to any one of claims 1-8, characterized in that, The limiting boss is integrally formed with the cover plate.

10. The cover plate according to claim 1, characterized in that, The cover plate has an overall bowl-shaped structure.

11. A display panel, characterized in that, include: The cover plate as described in any one of claims 1-10; as well as A display module, wherein the display module is disposed on the inner surface of the planar portion and the inner surface of the side portion.

12. The display panel according to claim 11, characterized in that, The maximum distance from the surface of the limiting boss away from the side portion to the inner surface of the side portion is greater than the distance from the surface of the display module away from the side portion to the inner surface of the side portion.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 11-12.

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