Cover plate structure, display module and display device

Abstract

The present application provides a cover plate structure, a display module and a display device. The cover plate structure is used for packaging and protecting the display module, and includes: a flexible cover plate body and a protective coating. The flexible cover plate body includes a covering structure and a thinning structure located around the covering structure. The covering structure is located in the middle area of ​​the flexible cover plate body and is used to match the display area of ​​the display module. The protective coating is arranged along the edge of the thinning structure and at least partially covers the thinning structure. The cover plate structure provided by the present application arranges a protective coating on the thinning structure of the flexible cover plate body. The protective coating can at least cover a part of the thinning structure, thereby protecting the edge of the flexible cover plate body, thereby improving the collision resistance of the edge of the flexible cover plate body, which is beneficial to improving the product strength and service life of the display module and the corresponding display device.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular, to a cover plate structure, a display module and a display device. Background Art

[0002] Folding display products are gradually maturing and entering the market. Since folding products use more flexible polymer materials, such as PET or polyimide (PI) materials, the polymer materials will creep due to long-term stress in the folded state, resulting in creases or deformation. In order to improve the crease problem of folding display products, ultra-thin glass can be used to replace polymer materials.

[0003] When ultra-thin glass is used as the cover of the display module, the biggest risk is that the glass is easy to break. In glass processing, the edge treatment of the glass is particularly important. The edge of the glass needs to be polished, and different polishing treatments can improve the bending performance of the glass. However, during product processing and use, the edge of the glass is easily hit by external forces. Due to the extremely thin thickness of foldable glass, it is more likely to break, causing product failure. In addition, the polishing of the edge cannot prevent damage caused by impact, and the edge of the glass may be more likely to break when hit due to local thinning due to polishing. Summary of the invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a cover plate structure, a display module and a display device to solve the problem that the edge of the ultra-thin glass cover plate of the existing display module is easily broken by impact.

[0005] In the first aspect, an embodiment of the present application provides a cover structure for packaging and protecting a display module, comprising: a flexible cover body and a protective coating; the flexible cover body comprises a covering structure and a thinning structure located at the periphery of the covering structure, the covering structure is located in the middle area of ​​the flexible cover body, and is used to match the display area of ​​the display module; the protective coating is arranged along the edge of the thinning structure and at least covers a portion of the thinning structure.

[0006] In some possible implementations, a projection of the protective coating in the plane where the flexible cover body is located is a closed annular structure.

[0007] In some possible implementations, the protective coating has a U-shaped structure in a cross section perpendicular to the flexible cover body of the covering structure; the U-shaped structure includes a first covering segment located on one side of the thinning structure, a second covering segment located on the other side of the thinning structure, and a connecting segment connecting the first covering segment and the second covering segment;

[0008] The first covering section is in contact with one side of the thinning structure, the second covering section is in contact with the other side of the thinning structure, and the connecting section is in contact with the edge of the thinning structure.

[0009] In some possible implementations, a side of the connecting section away from the thinning structure is an arc structure.

[0010] In some possible implementations, the thickness of the first covering segment and the second covering segment in a direction perpendicular to the covering structure gradually increases from an end away from the connecting segment to an end close to the connecting segment.

[0011] In some possible implementations, the first covering segment and / or the second covering segment extends toward the covering structure away from one end of the connecting segment and partially covers the covering structure.

[0012] In some possible implementations, the thickness of the covering structure in a direction perpendicular to the flexible cover body is 5 microns to 15 microns; and / or the thickness of the thinning structure and the protective coating covering the thinning structure in a direction perpendicular to the flexible cover body is 8 microns to 20 microns.

[0013] In some possible implementations, the material of the protective coating includes at least: transparent polyimide or, polyimide doped with silicon particles or.

[0014] In some possible implementations, the material of the protective coating layer also includes an ink material with a preset color.

[0015] In some possible implementations, the material of the flexible cover body includes at least: a single layer of ultra-thin glass, a single layer or multiple layers of flexible polymer film material, a combination of a single layer or multiple layers of flexible polymer film material and ultra-thin glass, or ultra-thin glass with a single-sided or double-sided polymer coating.

[0016] In a second aspect, an embodiment of the present application further provides a display module, comprising the cover plate structure described in the first aspect.

[0017] In some possible implementations, the display module further includes: a stacked supporting film material, a flexible display screen, and a functional film material; and the cover plate structure is arranged on a side of the functional film material away from the flexible display screen.

[0018] In a third aspect, an embodiment of the present application further provides a display device, comprising the display module described in the second aspect.

[0019] In some possible implementations, the display device further includes: a foldable whole-machine component; and the display module is installed in cooperation with the whole-machine component.

[0020] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application are:

[0021] The cover plate structure provided in the embodiment of the present application arranges a protective coating on the edge of the thinning structure of the flexible cover plate body. The protective coating can at least cover a portion of the thinning structure, thereby protecting the edge of the flexible cover plate body, thereby improving the collision resistance of the edge of the flexible cover plate body, which is beneficial to improving the product strength and service life of the display module and the corresponding display device.

[0022] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A top view of a cover plate structure provided in an embodiment of the present application;

[0025] Figure 2 Provided in the embodiments of this application Figure 1 A schematic diagram of a structure along the AA section;

[0026] Figure 3 Provided in the embodiments of this application Figure 2 A is an enlarged schematic diagram;

[0027] Figure 4 Provided in the embodiments of this application Figure 1 Another structural schematic diagram along the AA section;

[0028] Figure 5 Provided in the embodiments of this application Figure 4 The enlarged diagram of B in the middle;

[0029] Figure 6 Provided in the embodiments of this application Figure 1 Another structural schematic diagram along the AA section;

[0030] Figure 7 A schematic diagram of the internal structure of a display module provided in an embodiment of the present application;

[0031] Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0032] in:

[0033] 1-Display module;

[0034] 100-cover plate structure;

[0035] 110-flexible cover body; 111-covering structure; 112-thinning structure;

[0036] 120-protective coating; 121-first covering section; 122-second covering section; 123-connecting section;

[0037] 200-functional membrane material;

[0038] 300-Flexible display;

[0039] 400-support membrane material;

[0040] 500-optical glue;

[0041] 600-rubber;

[0042] 2-complete machine assembly; 21-bending area; 22-rotating shaft. DETAILED DESCRIPTION

[0043] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0045] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0046] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0047] Combination Figure 1 and Figure 2 As shown, the embodiment of the present application provides a cover structure 100 for packaging and protecting the display module 1, including: a flexible cover body 110 and a protective coating 120; the flexible cover body 110 includes a covering structure 111 and a thinning structure 112 located around the covering structure 111, and the covering structure 111 is located in the middle area of ​​the flexible cover body 110, and is used to correspond to the display area of ​​the display module 1, and can protect the display area while achieving light transmission. The protective coating 120 is arranged along the edge of the thinning structure 112 and at least covers a portion of the thinning structure 112.

[0048] The cover structure 100 provided in the embodiment of the present application arranges a protective coating 120 on the edge of the thinning structure 112 of the flexible cover body 110. The protective coating 120 can at least cover a portion of the thinning structure 112, thereby protecting the edge of the flexible cover body 110, thereby improving the collision resistance of the edge of the flexible cover body 110, which is beneficial to improving the product strength and service life of the display module 1 and the corresponding display device.

[0049] Specifically, the cover structure 100 in this embodiment is used for packaging and protecting the display module 1. In order to facilitate the installation of the cover structure 100 and taking into account the total thickness of the entire cover structure 100, the edge area of ​​the flexible cover body 110 needs to be thinned, that is, the thinning structure 112 in this embodiment. Wrapping the thinning structure 112 can not only protect the edge of the flexible cover body 110, but also control the thickness of the edge of the entire cover structure 100.

[0050] It can be understood that for the protective coating 120 that at least partially covers the thinning structure 112, only a portion of the thinning structure 112 may be covered by the protective coating 120. Since the thinning structure 112 is located at the edge area of ​​the flexible cover body 110, the thinning structure 112 covered by the protective coating 120 can play a protective and buffering role, thereby reducing the risk of edge breakage of the flexible cover body 110 as a whole.

[0051] In addition, the covering structure 111 and the thinning structure 112 defined in the embodiment of the present application are mainly for the convenience of describing the positional relationship of the protective coating 120, and do not limit the specific structure and size of the covering structure 111 and the thinning structure 112.

[0052] Optionally, the material of the flexible cover body 110 can be a single layer of ultra-thin glass, a single layer or multiple layers of flexible polymer film, a combination of a single layer or multiple layers of flexible polymer film and ultra-thin glass, or ultra-thin glass with a single-sided or double-sided polymer coating.

[0053] Optionally, the protective coating 120 may be made of organic polymer materials such as polyimide (PI), because PI has good thermal stability and mechanical properties, can be well combined with the edge of the flexible cover body 110, and can provide good protection for the flexible cover body 110 wrapped inside the PI. Specifically, the protective coating 120 may be transparent polyimide or polyimide doped with silicon particles.

[0054] Optionally, the protective coating 120 may also be an ink material with a preset color, such as black, white or red ink, so that the protective coating 120 not only protects the edge of the flexible cover body 110, but also can be used for ink decoration.

[0055] Optionally, the thickness of the protective coating 120 utilizes the natural properties of the solution (eg, ink material) to slowly level out to form a gradual slope, which is beneficial for the ink material to adhere; and is also beneficial for the optically clear adhesive (OCA) to absorb the thickness difference.

[0056] In some embodiments, continue to refer to Figure 1 The projection of the protective coating 120 in the plane where the flexible cover body 110 is located is a closed annular structure, that is, the protective coating 120 is arranged along the periphery of the flexible cover body 110 .

[0057] Specifically, the thinning structure 112 in the embodiment of the present application is located in the edge area of ​​the flexible cover body 110 (that is, located around the covering structure 111). In order to further improve the protection of the protective coating 120 on the edge of the flexible cover body 110, the protective coating 120 is spread over the entire peripheral area of ​​the flexible cover body 110 and forms a closed annular structure, which can comprehensively protect the edge of the flexible cover body 110, thereby further improving the collision resistance of the edge of the flexible cover body 110.

[0058] It should be noted that the plane where the flexible cover body 110 is located refers to Figure 1 The plane where the graphic corresponding to the top view of the flexible cover body 110 is located.

[0059] In the cover structure 100 provided in this embodiment, the protective coating 120 is arranged along the entire edge of the flexible cover body 110, so as to fully protect the edge of the flexible cover body 110, thereby improving the structural strength of the cover structure 100 and extending its service life.

[0060] In some embodiments, in combination Figure 2 and Figure 3 As shown, the cross section of the protective coating 120 in a direction perpendicular to the flexible cover body 110 is a U-shaped structure, and the openings of the U-shaped structure are all facing the covering structure 111 .

[0061] Among them, the U-shaped structure includes in sequence: a first covering section 121, a connecting section 123 and a second covering section 122, the first covering section 121 is located on one side of the thinning structure 112 and is fitted with one side of the thinning structure 112, and the second covering section 122 is located on the other side of the thinning structure 112 and is fitted with the other side of the thinning structure 112; the connecting section 123 is fitted with the edge of the thinning structure 112, and connects the first covering section 121 and the second covering section 122 to serve as a transition between the first covering section 121 and the second covering section 122.

[0062] It is understandable that the first covering section 121, the connecting section 123 and the second covering section 122 are only defined for the convenience of describing the specific structure of the U-shaped structure. The U-shaped structure is actually an integral structure and can be manufactured in the edge area of ​​the flexible cover body 110 by a painting process.

[0063] Combination Figure 1 and Figure 4 As shown, Figure 1 In the cover structure 100, the protective coating 120 has a U-shaped structure in any cross section perpendicular to the flexible cover body 110, so that the thinning structure 112 at the edge of the entire flexible cover body 110 is covered, thereby improving the protection effect on the edge of the flexible cover body 110.

[0064] Optionally, the first covering section 121 and the second covering section 122 of the U-shaped structure may be symmetrical or asymmetrical about the connecting section 123 , which depends on whether the slopes on both sides of the thinning structure 112 of the flexible cover body 110 are symmetrical.

[0065] Alternatively, if Figure 4 and Figure 5 As shown, considering the manufacturing process of the protective coating 120 and the packaging bonding effect, the side of the connecting section 123 of the U-shaped structure away from the thinning structure 112 is an arc structure, that is, the edge of the U-shaped structure is processed into the edge of the rounded structure.

[0066] Alternatively, if Figure 4 and Figure 5As shown, in order to improve the coating effect of the protective coating 120 and improve the protection effect of the flexible cover body 110 , the edge of the thinning structure 112 is processed into an edge of a rounded structure by grinding and polishing, which facilitates the coating and production of the protective coating 120 .

[0067] Optionally, the protective coating 120 may be coated by dipping and then cured, or may be coated by double-sided printing and cured by thermal curing, UV curing, or the like.

[0068] In some embodiments, continue to refer to Figure 4 and Figure 5 In order to make the thickness of the edge area (thinning structure 112) of the cover structure 100 as consistent as possible with the thickness of the middle area (covering structure 111), the thickness of the first covering section 121 and the second covering section 122 in a direction perpendicular to the covering structure 111 gradually increases from the end away from the connecting section 123 to the end close to the connecting section 123.

[0069] In this embodiment, since both sides of the thinning structure 112 of the flexible cover body 110 have a certain slope, the thickness of the thinning structure 112 along the direction perpendicular to the flexible cover body 110 is less than the thickness of the covering structure 111 along the direction perpendicular to the flexible cover body 110, ensuring that the total thickness of the thinning structure 112 after being coated with the protective coating 120 remains substantially unchanged. In order to adapt to the slope of the thinning structure 112 and control the total thickness of the edge of the flexible cover body 110, it is necessary to set the thickness of the first covering section 121 and the second covering section 122 coated with the protective coating to gradually increase from the end away from the connecting section 123 to the end close to the connecting section 123, so that the thickness of any position in the thinning structure 112 along the direction perpendicular to the flexible cover body 110 can be controlled within a relatively consistent range, which is conducive to the matching installation of the cover structure 100, and can also ensure the structural strength of the edge of the cover structure 100.

[0070] Optionally, continue to Figure 4 The connecting section 123 of the protective coating 120 can be an arc-shaped structure, and the thickness of the arc-shaped structure along any radial direction can be set to be consistent.

[0071] Alternatively, if Figure 4 As shown, the thickness of the covering structure 111 in a direction perpendicular to the flexible cover body 110 (ie, the thickness of the middle region of the flexible cover body 110 ) is 5 μm to 15 μm, including end points of 5 μm and 15 μm.

[0072] Optionally, the thickness of the thinning structure 112 and the protective coating 120 covering the thinning structure 112 in a direction perpendicular to the flexible cover body 110 (ie, the total thickness of the edge region of the flexible cover body 110 ) is 8 μm to 20 μm, including endpoint values ​​of 8 μm and 20 μm.

[0073] In some embodiments, Figure 6 As shown, in order to further enhance the protection effect of the thinning structure 112, the end of the first covering section 121 or the second covering section 122 away from the connecting section 123 can be extended toward the covering structure 111, and partially cover the covering structure 111. Of course, the ends of the first covering section 121 and the second covering section 122 away from the connecting section 123 can also be extended toward the covering structure 111 at the same time, and cover a partial area of ​​the covering structure 111.

[0074] It should be noted that the coverage area of ​​the first covering section 121 and the second covering section 122 in the covering structure 111 should not be too large, so as not to affect the light output of the display module 1 and increase the overall thickness of the entire cover plate structure 100. In addition, for a transparent protective coating, the first covering section 121 and the second covering section 122 can be appropriately extended a little further to the area where the covering structure 111 is located; for an opaque protective coating (such as colored ink), the first covering section 121 and the second covering section 122 generally do not need to extend to the area where the covering structure 111 is located, so as not to affect the normal display of the display module.

[0075] The cover structure 100 provided in this embodiment extends the first covering section 121 and / or the second covering section 122 toward the covering structure 111 on each side to ensure that the thinning structure 112 is completely covered, thereby increasing the protection effect on the thinning structure 112 and making the edge of the entire cover structure 100 more stable when impacted by external force.

[0076] Based on the same inventive concept, Figure 7 As shown, the embodiment of the present application further provides a display module 1, which includes the aforementioned cover plate structure 100 in the embodiment of the present application.

[0077] The display module 1 provided in this embodiment includes a cover structure 100 whose edge is covered by a protective coating 120. The cover structure 100 arranges a protective coating 120 on the thinning structure 112 of the flexible cover body 110. The protective coating 120 can at least cover a portion of the thinning structure 112, thereby protecting the edge of the flexible cover body 110, thereby improving the collision resistance of the edge of the flexible cover body 110, and is beneficial to improving the product strength and service life of the display module 1 and the corresponding display device.

[0078] In some embodiments, continue to refer to Figure 7The display module 1 further includes: a stacked supporting film material 400 , a flexible display screen 300 and a functional film material 200 ; and the cover plate structure 100 is arranged on a side of the functional film material 200 away from the flexible display screen 300 .

[0079] Specifically, Figure 7 The structure of the display module 1 in the embodiment includes a supporting film material 400 and a flexible display screen 300, a functional film material 200 and a cover plate structure 100 stacked on the supporting film material 400. The flexible display screen 300 is fixedly connected to the supporting film material 400 through an adhesive material 600, and the two sides of the functional film material 200 (such as a polarizing layer or a touch layer) are fixedly connected to the flexible display screen 300 and the flexible cover plate through optical adhesive 500 (OCA). OCA is a special adhesive used for bonding transparent optical elements. It has the characteristics of being colorless and transparent, having a light transmittance of more than 90%, having good bonding strength, being curable at room temperature or medium temperature, and having small curing shrinkage.

[0080] Based on the same inventive concept, Figure 8 As shown, the embodiment of the present application further provides a display device, including the aforementioned display module 1 in the embodiment of the present application.

[0081] The display device provided in this embodiment includes the aforementioned display module 1 in the embodiment of the present application, and the cover structure 100 whose aforementioned edge is covered by the protective coating 120. The cover structure 100 arranges the protective coating 120 on the thinning structure 112 of the flexible cover body 110. The protective coating 120 can at least cover a part of the thinning structure 112, thereby protecting the edge of the flexible cover body 110, thereby improving the collision resistance of the edge of the flexible cover body 110, which is beneficial to improving the product strength and service life of the display module 1 and the corresponding display device.

[0082] In some embodiments, continue to refer to Figure 8 The display device further includes: a foldable whole machine component 2; a display module 1 and the whole machine component 2 are installed in coordination.

[0083] In this embodiment, the display device is a foldable display device, which includes a foldable whole assembly 2. The whole assembly 2 specifically includes a housing structure, circuit components, and connectors, and the whole assembly 2 is configured according to actual size and function. The bending area 21 of the whole assembly 2 is folded by a rotating shaft 22, and cooperates with the flexible display module 1 to achieve bending of the display module 1 during the bending of the whole assembly 2.

[0084] Each embodiment of the present application has at least the following technical effects:

[0085] 1. By arranging a protective coating 120 on the thinning structure 112 of the flexible cover body 110, the protective coating 120 can at least cover a portion of the thinning structure 112, thereby protecting the edge of the flexible cover body 110, thereby improving the collision resistance of the edge of the flexible cover body 110, which is beneficial to improving the product strength and service life of the display module 1 and the corresponding display device.

[0086] 2. The flexible cover body 110 in this embodiment is used for packaging and protecting the display module 1. In order to facilitate the installation of the flexible cover and taking into account the total thickness of the entire cover structure 100, the edge area of ​​the flexible cover body 110 needs to be thinned, that is, the thinning structure 112 in this embodiment. Wrapping the thinning structure 112 can not only protect the edge of the flexible cover body 110, but also control the thickness of the edge of the entire cover structure 100.

[0087] 3. The protective coating 120 can be made of organic polymer materials such as polyimide, which has good thermal stability and mechanical properties, can be well combined with the edge of the flexible glass cover, and can provide good protection for the flexible glass cover wrapped inside.

[0088] 4. The protective coating 120 can also be an ink material with a preset color, which not only plays a protective role, but also can be used for ink decoration.

[0089] 5. The protective coating 120 is arranged along the entire edge of the flexible cover body 110, so as to fully protect the edge of the flexible cover body 110, thereby improving the structural strength of the cover structure 100 and extending the service life.

[0090] 6. The protective coating 120 has a U-shaped structure in any cross section perpendicular to the flexible cover body 110 , so that the thinning structure 112 at the edge of the entire flexible cover body 110 is covered, thereby improving the protection effect on the edge of the flexible cover body 110 .

[0091] 7. In order to improve the coating effect of the protective coating 120 and improve the protection effect of the flexible cover body 110, the edge of the thinning structure 112 is processed into the edge of a rounded structure by grinding and polishing, so as to facilitate the coating and production of the protective coating 120.

[0092] 8. The thickness of the first covering section 121 and the second covering section 122 of the coating are set to gradually increase from the end away from the connecting section 123 to the end close to the connecting section 123, so that the thickness at any position in the thinning structure 112 along the direction perpendicular to the flexible cover body 110 can be controlled within a relatively consistent range, which is beneficial to the matching installation of the cover structure 100 and can also ensure the structural strength of the edge of the cover structure 100.

[0093] 9. By extending the first covering section 121 and / or the second covering section 122 to the covering structure 111 domain on each side, it is ensured that the thinning structure 112 can be completely covered, thereby increasing the protection effect of the thinning structure 112 and making the edge of the entire cover structure 100 more stable when impacted by external force.

[0094] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0095] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0096] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0098] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A cover plate structure for packaging and protecting a display module, characterized in that: include: Flexible cover body and protective coating; The flexible cover body comprises a covering structure and a thinning structure located around the covering structure, wherein the covering structure is located in the middle area of ​​the flexible cover body and is used to match the display area of ​​the display module; The protective coating is arranged along the edge of the thinned structure and covers at least a portion of the thinned structure; The cross section of the protective coating in a direction perpendicular to the flexible cover body is in a U-shaped structure; The U-shaped structure comprises a first covering section located at one side of the thinning structure, a second covering section located at the other side of the thinning structure, and a connecting section connecting the first covering section and the second covering section; The first covering section is in contact with one side of the thinning structure, the second covering section is in contact with the other side of the thinning structure, and the connecting section is in contact with the edge of the thinning structure; The side of the connecting section away from the thinning structure is an arc structure; The thickness of the first covering section and the second covering section in a direction perpendicular to the covering structure gradually increases from an end away from the connecting section to an end close to the connecting section.

2. The cover plate structure according to claim 1, characterized in that: The projection of the protective coating in the plane where the flexible cover plate body is located is a closed annular structure.

3. The cover plate structure according to claim 1, characterized in that: The first covering section and / or the second covering section extends toward the covering structure from one end of the connecting section and partially covers the covering structure.

4. The cover plate structure according to claim 1, characterized in that: The thickness of the covering structure in a direction perpendicular to the flexible cover body is 5 microns to 15 microns; And / or, the thickness of the thinning structure and the protective coating covering the thinning structure along a direction perpendicular to the flexible cover plate body is 8 micrometers to 20 micrometers.

5. The cover plate structure according to claim 1, characterized in that: The material of the protective coating layer at least includes: transparent polyimide, polyimide doped with silicon particles, or ink material with a preset color.

6. The cover plate structure according to claim 1, characterized in that: The material of the flexible cover body includes at least: Single-layer ultra-thin glass, single-layer or multi-layer flexible polymer film material, a combination of single-layer or multi-layer flexible polymer film material and ultra-thin glass, or ultra-thin glass with single-sided or double-sided polymer coating.

7. A display module, characterized in that: The invention comprises the cover plate structure according to any one of claims 1 to 6.

8. The display module according to claim 7, characterized in that: Also includes: Laminated support films, flexible display screens and functional films; The cover plate structure is arranged on a side of the functional film material away from the flexible display screen.

9. A display device, characterized in that: Comprising the display module described in claim 7 or 8.

10. The display device according to claim 9, characterized in that: Also includes: Foldable whole machine components; The display module is installed in coordination with the complete machine assembly.

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