Display module, manufacturing method thereof and display device

Abstract

The embodiment of the invention provides a display module, a manufacturing method of the display module and a display device. The display module comprises a display screen body, a cover plate and a protective cover. The cover plate is located on one side of the display screen body. The protective cover covers the surface, away from the cover plate, of the display screen body and the side wall of the display screen body and is connected with the surface, close to the display screen body, of the cover plate. The protective cover comprises a flexible base material and a hardened layer, and the hardened layer is located on the side, away from the display screen body, of the flexible base material. The protection cover jointly formed by the flexible base material and the hardened layer covers the surface, away from the cover plate, of the display screen body and the side wall of the display screen body and can be used for replacing a metal protection cover in the related technology so as to improve the waterproof and air-proof effect of the display module and improve the anti-pressure ability of the display module, meanwhile, the protection cover has the advantages that the forming process of the protection cover is reduced, and the production cost is reduced. And the cost is reduced.

Description

Technical Field

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

[0002] Currently, display screens are widely used in products and equipment in various industries. Since display devices may encounter some problems in usage scenarios, such as physical damage, dust or moisture intrusion, some protective structures are often set in the display modules to improve the safety, reliability and durability of the display modules.

[0003] However, there are still some problems with the protection structure of the display module. Summary of the invention

[0004] The embodiments of the present application provide a display module, a method for manufacturing the display module, and a display device, so as to improve the problems existing in the protective structure of the display module in the related art.

[0005] In a first aspect, a display module is provided, the display module comprising a display screen, a cover plate and a protective cover. The cover plate is located on one side of the display screen; the protective cover covers the surface of the display screen away from the cover plate and the side wall of the display screen, and is connected to the surface of the cover plate close to the display screen; wherein the protective cover comprises a flexible substrate and a hardening layer, and the hardening layer is located on the side of the flexible substrate away from the display screen.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the orthographic projection of the hardening layer on the cover plate covers the orthographic projection of the flexible substrate on the cover plate.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the flexible substrate covers a surface of the display screen body facing away from the cover plate and a side wall of the display screen body, and is connected to a surface of the cover plate close to the display screen body.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the flexible substrate includes a first part and a second part, the first part covers the surface of the display screen body facing away from the cover plate, the second part covers the side wall of the display screen body, and the hardening layer covers the first part and the second part.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the hardness of the hardened layer is greater than the hardness of the flexible substrate.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the thickness of the hardened layer is greater than or equal to the thickness of the flexible substrate.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the density of the hardened layer is greater than the density of the flexible substrate.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the thickness of the flexible substrate is greater than or equal to 0.05 mm and less than or equal to 0.1 mm.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the thickness of the hardened layer is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the elastic modulus of the flexible substrate is greater than or equal to 2 GPa and less than or equal to 4 GPa.

[0015] In combination with the first aspect, in certain implementations of the first aspect, a hardness of the flexible substrate is greater than or equal to 2H and less than or equal to 3H.

[0016] In combination with the first aspect, in some implementations of the first aspect, the cover plate includes a main body area and a frame area surrounding the main body area, and the protective cover is connected to the frame area.

[0017] In combination with the first aspect, in certain implementations of the first aspect, the orthographic projection of the display screen on the cover plate is within the range of the main body area.

[0018] In combination with the first aspect, in some implementations of the first aspect, the display screen includes an organic light emitting display screen.

[0019] In combination with the first aspect, in some implementations of the first aspect, an ink layer is further included, the ink layer is attached to the frame area of ​​the cover plate on the side close to the display screen, and the protective cover is connected to the surface of the ink layer close to the display screen.

[0020] In combination with the first aspect, in some implementations of the first aspect, the flexible substrate includes an organic material; and / or the hardening layer includes an organic material.

[0021] In combination with the first aspect, in some implementations of the first aspect, the flexible substrate includes at least one of a polyethylene terephthalate film and a polyimide film.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the hardening layer includes at least one of a polyurethane adhesive layer and an epoxy adhesive layer.

[0023] In combination with the first aspect, in some implementations of the first aspect, it also includes an adhesive layer, and the adhesive layer bonds the protective cover and the cover plate.

[0024] In a second aspect, a display module is provided, comprising: a display screen; a cover plate located on one side of the display screen; and a protective cover covering a surface of the display screen facing away from the cover plate and a side wall of the display screen, and connected to a surface of the cover plate close to the display screen; wherein the protective cover comprises an adhesive layer and a flexible substrate, the adhesive layer being located on a side of the cover plate close to the display screen, the adhesive layer surrounding the side wall of the display screen, and the flexible substrate being located on a side of the adhesive layer and the display screen away from the cover plate.

[0025] In combination with the second aspect, in some implementations of the second aspect, the cover plate includes a main body area and a frame area surrounding the main body area, and the adhesive layer bonds the flexible substrate to connect with the frame area of ​​the cover plate.

[0026] In combination with the second aspect, in certain implementations of the second aspect, the orthographic projection of the display screen on the cover plate is within the range of the main body area.

[0027] In combination with the second aspect, in some implementations of the second aspect, the display screen includes an organic light emitting display screen.

[0028] In conjunction with the second aspect, in some implementations of the second aspect, the flexible substrate includes an organic material.

[0029] In combination with the second aspect, in certain implementations of the second aspect, the flexible substrate includes at least one of a polyethylene terephthalate film and a polyimide film.

[0030] In combination with the second aspect, in certain implementations of the second aspect, the thickness of the adhesive layer is greater than or equal to the thickness of the display screen.

[0031] In combination with the second aspect, in certain implementations of the second aspect, the surface of the adhesive layer away from the cover plate is flush with the surface of the display screen away from the cover plate, or the distance between the surface of the adhesive layer away from the cover plate and the cover plate is greater than the distance between the surface of the display screen away from the cover plate and the cover plate.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the thickness of the flexible substrate is greater than or equal to 0.05 mm and less than or equal to 0.1 mm.

[0033] In a third aspect, a method for manufacturing a display module is provided, comprising:

[0034] Providing a stacked display screen body and a cover plate;

[0035] A protective cover is attached to the side of the display screen body facing away from the cover plate, and the edge area of ​​the protective cover is connected to the cover plate;

[0036] The protective cover comprises a flexible substrate and a hardening layer, and the hardening layer is located on a side of the flexible substrate away from the display screen.

[0037] In a fourth aspect, a method for manufacturing a display module is provided, comprising:

[0038] Providing a stacked display screen body and a cover plate;

[0039] A flexible substrate is attached to the side of the display screen body facing away from the cover plate, and the edge area of ​​the flexible substrate is connected to the cover plate;

[0040] A hardening layer is prepared on a side of the flexible substrate away from the display screen.

[0041] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, preparing a hardening layer on a side of the flexible substrate away from the display screen body includes:

[0042] Spraying a hardening material on a side of the flexible substrate away from the display screen to form a hardening layer;

[0043] In combination with the fourth aspect, in certain implementations of the fourth aspect, the orthographic projection of the hardening layer on the cover plate covers the orthographic projection of the flexible substrate on the cover plate.

[0044] In a fifth aspect, a display device is provided, comprising any one of the display modules described above, or a display module obtained by any one of the methods for manufacturing the display modules described above.

[0045] The embodiment of the present application provides a display module, a method for manufacturing a display module, and a display device. The display module includes a display screen, a cover plate, and a protective cover. The cover plate is located on one side of the display screen; the protective cover covers the surface and side wall of the display screen away from the cover plate, and is connected to the surface of the cover plate close to the display screen; wherein the protective cover includes a flexible substrate and a hardening layer, and the hardening layer is located on the side of the flexible substrate away from the display screen.

[0046] The present application provides a protective cover composed of a flexible substrate and a hardened layer. The protective cover covers the surface of the display screen away from the cover plate and the side wall of the screen body. It can be used to replace the metal protective cover in the related technology to improve the waterproof and airtight effect of the display module and enhance the pressure resistance of the display module. At the same time, it also has the advantages of reducing the protective cover molding process, reducing costs, and / or reducing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0048] Figure 1a It is a schematic diagram of the cross-sectional structure of a display module in the related technology.

[0049] Figure 1b for Figure 1a The display module is shown in a top view along the AA' direction.

[0050] Figure 2a It is a schematic diagram of the cross-sectional structure of a display module in one embodiment of the present application.

[0051] Figure 2b for Figure 2a The display module is shown in a top view along the AA' direction.

[0052] Figure 2c for Figure 2a The display module is shown in a top view along the A'-A direction.

[0053] Figure 3a It is a schematic diagram of the cross-sectional structure of a display module in yet another embodiment of the present application.

[0054] Figure 3b for Figure 3a The top view of the module along the AA' direction is shown in FIG.

[0055] Figure 4 It is a schematic diagram of the cross-sectional structure of a display module in yet another embodiment of the present application.

[0056] Figure 5 It is a flow chart of a method for manufacturing a display module in one embodiment of the present application.

[0057] Figure 6 This is a flow chart of a method for manufacturing a display module in yet another embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The features and exemplary embodiments of various aspects of the present application will be described in detail below.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0060] The protection structure of the display module in the related art has some problems. Figure 1a and Figure 1b As shown, Figure 1a It is a schematic diagram of the cross-sectional structure of a display module in the related technology. Figure 1b for Figure 1a The top view of the display module along the AA' direction is shown. Figure 1a and Figure 1b As shown, in the related art, in order to prevent water vapor from affecting the display module, a metal protective cover 20 is designed on the outside of the screen body. However, the processing technology of the metal protective cover 20 is complicated and difficult, and the weight is large. In addition, since there are gaps such as welds at the metal joints of the metal protective cover 20, the water vapor blocking effect of the metal protective cover 20 is not ideal.

[0061] In view of this, the present application provides a display module, a method for manufacturing a display module, and a display device. The present application provides a protective cover composed of a flexible substrate and a hardening layer, the protective cover covers the surface of the display screen body away from the cover plate and the side wall of the display screen body, and can be used to replace the metal protective cover in the related art to improve the waterproof and gas-proof effect of the display module, enhance the pressure resistance of the display module, and also have the advantages of reducing the protective cover molding process, reducing costs, and / or reducing weight.

[0062] In one embodiment, the display module includes a display screen, a cover plate and a protective cover. The cover plate is located on one side of the display screen; the protective cover covers the surface and side wall of the display screen away from the cover plate, and is connected to the surface of the cover plate close to the display screen; wherein the protective cover includes a flexible substrate and a hardening layer, and the hardening layer is located on the side of the flexible substrate away from the display screen, specifically Figure 2a-Figure 4 For example, the cover plate is located on the display side of the display screen.

[0063] Figure 2a This is a schematic diagram of the cross-sectional structure of a display module in one embodiment of the present application. Figure 2b for Figure 2aThe top view of the display module along the AA' direction is shown. Figure 2c for Figure 2a The top view of the display module along the A'-A direction is shown. Figure 2a , Figure 2b and Figure 2c As shown, the display module includes a display screen 10, a cover plate 30 and a protective cover 40. The cover plate 30 is located on one side of the display screen 10; the protective cover 40 covers the surface and side wall of the display screen 10 away from the cover plate 30, and is connected to the surface of the cover plate 30 close to the display screen 10; wherein the protective cover 40 includes a flexible substrate 41 and a hardening layer 42, and the hardening layer 42 is located on the side of the flexible substrate 41 away from the display screen 10.

[0064] The present embodiment provides a protective cover 40 composed of a flexible substrate 41 and a hardening layer 42. The protective cover 40 covers the surface of the display screen 10 facing away from the cover plate 30 and the side wall of the display screen 10. It can be used to replace the metal protective cover in the related technology to improve the waterproof and gas-proof effect of the display module and enhance the pressure resistance of the display module. It also has the advantages of reducing the protective cover molding process and reducing costs.

[0065] In one embodiment, the flexible substrate 41 covers the surface of the display screen 10 facing away from the cover plate 30 and the side wall of the display screen 10 , and is connected to the surface of the cover plate 30 close to the display screen 10 .

[0066] In one embodiment, the flexible substrate 41 includes a first portion and a second portion, the first portion covers the surface of the display screen 10 facing away from the cover plate 30 , the second portion covers the sidewall of the display screen 10 , and the hardening layer 42 covers the first portion and the second portion.

[0067] In one embodiment, the hardness of the hardened layer 42 is greater than the hardness of the flexible substrate 41. This configuration can improve the barrier effect of the protective cover on water vapor, and / or the protection strength and support strength.

[0068] In one embodiment, the thickness t2 of the hardened layer 42 is greater than or equal to the thickness t1 of the flexible substrate 41. This configuration can improve the barrier effect of the protective cover on water vapor and / or the protection strength and support strength.

[0069] In one embodiment, the density of the hardened layer 42 is greater than the density of the flexible substrate 41. This configuration can improve the barrier effect of the protective cover on water vapor, and / or the protection strength and support strength.

[0070] In one embodiment, the thickness t1 of the flexible substrate 41 is greater than or equal to 0.05 mm and less than or equal to 0.1 mm. By optimizing the thickness t1 of the flexible substrate 41, it can be ensured that the flexible substrate 41 has sufficient strength to support and protect the display module, and does not increase the overall weight or affect the thin and light design of the device due to excessive thickness. For example, t1 can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm or 0.1 mm, etc.

[0071] In one embodiment, the thickness t2 of the hardened layer 42 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm. By optimizing the thickness t2 of the hardened layer 42, sufficient water vapor and pressure resistance can be provided while maintaining good flexibility and adhesion. In addition, a hardened layer of appropriate thickness can ensure that the hardened layer can effectively block water vapor and external pressure, while not affecting the overall flexibility and aesthetics due to excessive thickness. For example, t2 can be 0.05 mm, 0.1 mm, 0.15 mm, or 0.2 mm.

[0072] In one embodiment, the elastic modulus of the flexible substrate 41 is greater than or equal to 2 GPa and less than or equal to 4 GPa, which can ensure that the flexible substrate 41 has a certain deformation ability when subjected to external force, and can quickly return to its original shape, thereby providing stable protection. For example, the elastic modulus of the flexible substrate 41 can be 2 GPa, 2.5 GPa, 3 GPa, 3.5 GPa or 4 GPa, etc.

[0073] In one embodiment, the hardness of the flexible substrate 41 is greater than or equal to 2H and less than or equal to 3H, which can ensure that the flexible substrate 41 has certain performance in resisting scratches and wear, and will not be too hard to affect the overall flexibility and processing performance. In addition, it can also ensure that it has certain flexibility and plasticity to facilitate processing and bonding. For example, the hardness of the flexible substrate 41 can be 2H, 2.2H, 2.5H, 2.8H or 3H, etc.

[0074] Optionally, the number of the flexible substrate 41 may be one or more, the number of the hardening layer 42 may be one or more, and the flexible substrate 41 and the hardening layer 42 are alternately stacked along the thickness direction of the display screen (e.g., parallel to the A-A' direction). For example, the flexible substrate 41, the hardening layer 42, and the flexible substrate 41 are stacked in sequence along the thickness direction of the display screen. For example, the flexible substrate 41, the hardening layer 42, the flexible substrate 41, and the hardening layer 42 are stacked in sequence along the thickness direction of the display screen.

[0075] In one embodiment, the flexible substrate 41 comprises an organic material; and / or the hardening layer comprises an organic material.

[0076] In one embodiment, the flexible substrate 41 includes at least one of a polyethylene terephthalate film and a polyimide film. First, the polyethylene terephthalate film has high tensile strength and tear strength, and its strength is comparable to that of an aluminum film, which is more than 9 times that of a polyethylene film, and is suitable for occasions where high-strength packaging materials are required. In this embodiment, it is beneficial to enhance the supporting capacity of the protective cover 40. In addition, the polyethylene terephthalate film has excellent tolerance to most chemical reagents and can resist corrosion from common chemicals, except that it is prone to hydrolysis under strong alkali and certain hot water conditions. Thirdly, the polyethylene terephthalate film has good barrier properties to oxygen and water vapor, and can be used to protect the contents of the package from the influence of external gases and moisture, and is particularly suitable for the protection of the display screen 10 in this embodiment, and is used to block the influence of external water vapor on the display screen 10. The polyimide film has excellent heat resistance and low temperature resistance, and can be used continuously in a wide temperature range of -269°C to 280°C. In addition, it has excellent mechanical properties. The tensile strength of unreinforced polyimide matrix materials is above 100MPa, and the elastic modulus of polyimide fibers can reach 500MPa, second only to carbon fibers. Polyimide films also have good chemical stability and resistance to moisture and heat. Polyimide materials are generally insoluble in organic solvents and are resistant to corrosion and hydrolysis. By changing the molecular design, polyimide varieties with different structures can be obtained to adapt to different application environments.

[0077] In one embodiment, the hardened layer 42 includes at least one of a polyurethane glue layer and an epoxy glue layer. Polyurethane glue (hardened to form a hardened layer), also known as polyurethane adhesive, is an adhesive with excellent performance and is widely used in various industrial projects. Polyurethane glue has extremely high bonding strength and good toughness, can withstand large tensile and shear forces, and is suitable for a variety of structural bonding requirements. Polyurethane glue has good weather resistance and can maintain bonding performance for a long time in outdoor environments. Polyurethane glue has good water resistance and is suitable for use in humid environments. It is suitable for isolating the display screen from external water vapor in this embodiment. Polyurethane glue expands when solidified, can fill gaps and form a tight seal, and is particularly suitable for uneven or porous surfaces. The solidified polyurethane glue is flexible and can cope with shocks and vibrations. It is suitable for the hardened layer used as a protective cover in this embodiment, thereby improving the support capacity and protective effect of the protective cover. The curing conditions of epoxy glue (hardened to form a hardened layer) are flexible, and can be cured at room temperature or the curing process can be accelerated by heating. Epoxy glue has a wide temperature range, which can be used in the range of -60℃ to 150℃. Some high-temperature glues can even withstand temperatures of more than 200 degrees. It can be used in the range of -60℃ to 150℃. Some high-temperature glues can even withstand temperatures of more than 200 degrees. After curing, epoxy glue has chemical stability such as acid and alkali resistance and solvent resistance. At the same time, it can also resist the erosion of most molds. After curing, epoxy glue can maintain a stable size, is not easy to deform, and has good electrical insulation properties. It is suitable for electronic and electrical fields.

[0078] In one embodiment, the cover plate 30 includes a main body area VA and a frame area NA surrounding the main body area VA, and the protective cover 40 is connected to the frame area NA. Figure 2a The main area VA may correspond to the display area of ​​the display module. The frame area NA may correspond to the non-display area of ​​the display module.

[0079] In one embodiment, the orthographic projection of the display screen 10 on the cover plate 30 is within the main body area VA.

[0080] In one embodiment, the display module further includes a polarizer 50, which is located on the side of the display screen 10 close to the cover plate 30. By using the polarizer 50, the contrast of the display screen 10 can be enhanced, making the black deeper and the white brighter, thereby improving the overall display effect. By using a specially designed polarizer, the energy efficiency of the display screen 10 can be improved, the energy loss can be reduced, and the use time of the device can be extended. In addition, the polarizer 50 can also protect the display screen 10, preventing moisture and oxygen in the external environment from damaging the panel, thereby extending the service life of the display module.

[0081] In one embodiment, the display module further includes an optical adhesive layer 60, which is located on the side of the polarizer 50 close to the cover plate 30. The optical adhesive layer 60 can improve the stability of the display module structure, and because the optical adhesive layer 60 has high light transmittance and low haze, it helps to reduce the scattering and reflection of light, thereby improving the brightness and contrast of the display module.

[0082] In one embodiment, the display module further includes an ink layer 70, which is attached to the frame area NA of the cover plate 30 on the side close to the display screen 10, and the protective cover 40 is connected to the surface of the ink layer 70 close to the display screen 10. The ink layer 70 is usually coated on the non-display area of ​​the display module to block the part that does not need to be displayed, and also serves as a decoration, making the appearance of the display module more neat and beautiful. In the frame area of ​​the display module, the ink layer 70 can prevent light from leaking from the edge of the display module, which can improve the light efficiency utilization rate and display effect of the display module. By using the ink layer 70 in the manufacturing process of the display module, the reliability and durability of the product can be improved, especially in applications under harsh environments.

[0083] Figure 3a This is a schematic diagram of the cross-sectional structure of a display module in another embodiment of the present application. Figure 3b for Figure 3a The top view of the module along the A-A' direction is shown in FIG. Figure 3a and Figure 3b As shown, the orthographic projection of the hardening layer 42 on the cover plate 30 covers the orthographic projection of the flexible substrate 41 on the cover plate 30 .

[0084] In this way, the hardening layer 42 covers a larger area of ​​the display screen 10, which is more conducive to increasing the overall strength and support capacity of the protective cover 40. At the same time, this embodiment provides a protective cover 40 composed of a flexible substrate 41 and a hardening layer 42. The protective cover 40 covers the surface of the display screen 10 away from the cover plate 30 and the side wall of the display screen, and can be used to replace the metal protective cover in the related art to improve the waterproof and gas-proof effect of the display module and enhance the pressure resistance of the display module. At the same time, it also has the advantages of reducing the protective cover molding process and reducing costs.

[0085] In one embodiment, the display module further includes an adhesive layer, such as a dispensing adhesive layer, which is located between the protective cover 40 and the cover plate 30 for bonding the protective cover 40 and the cover plate 30. This arrangement is used to further enhance the bonding force between the protective cover 40 and the cover plate 30.

[0086] In one embodiment, the adhesive layer is located between the ink layer 70 and the protective cover 40, and is used to bond the protective cover 40 and the cover plate 30. This arrangement is used to further enhance the bonding force between the protective cover 40 and the ink layer 70.

[0087] Figure 4 FIG. 1 is a schematic diagram of a cross-sectional structure of a display module in another embodiment of the present application. Figure 4 As shown, the display module further includes an adhesive layer 80, which is located on the side of the flexible substrate 41 close to the cover plate 30. In the case where the pressure resistance requirement is not high, by setting the flexible substrate 41 as the protective cover 40, under the adhesion of the adhesive layer 80, the display screen 10 is protected and the water vapor from the outside is also blocked.

[0088] In one embodiment, Figure 4 As shown, the display module includes: a display screen 10, a cover plate 30 and a protective cover 40. The cover plate 30 is located on one side of the display screen 10. The protective cover 40 covers the surface of the display screen 10 away from the cover plate 30 and the side wall of the display screen 10, and is connected to the surface of the cover plate 30 close to the display screen 10. The protective cover 40 includes an adhesive layer 80 and a flexible substrate 41, the adhesive layer 80 is located on the side of the cover plate 30 close to the display screen 10, the adhesive layer 80 surrounds the side wall of the display screen 10, and the flexible substrate 41 is located on the side of the adhesive layer 80 and the display screen 10 away from the cover plate 30. In this way, the barrier effect of the protective cover on water vapor can be improved.

[0089] This embodiment can be combined with part or all of the features of the above embodiments, which will not be described in detail here.

[0090] In one embodiment, the cover plate 30 includes a main body area VA and a border area NA surrounding the main body area, and the adhesive layer 80 bonds the flexible substrate 41 to connect with the border area NA of the cover plate 30 .

[0091] In one embodiment, the orthographic projection of the display screen 10 on the cover plate 30 is within the main body area VA.

[0092] In one embodiment, the display screen 10 includes an organic light emitting display screen.

[0093] In one embodiment, flexible substrate 10 includes an organic material.

[0094] In one embodiment, the flexible substrate 10 includes at least one of a polyethylene terephthalate film and a polyimide film.

[0095] In one embodiment, the thickness of the adhesive layer 80 is greater than or equal to the thickness of the display screen 10 .

[0096] The adhesive layer 80 may be an adhesive tape. The adhesive layer 80 may be an annular shape, such as a circular ring or a rectangular ring. The annular shape may be a closed annular shape or a non-closed annular shape.

[0097] In one embodiment, the surface of the adhesive layer 80 away from the cover plate 30 is flush with the surface of the display screen 10 away from the cover plate 30 .

[0098] Optionally, the distance between the surface of the adhesive layer 80 away from the cover plate 30 and the cover plate 30 is greater than or equal to the distance between the surface of the display screen 10 away from the cover plate 30 and the cover plate 30 .

[0099] In one embodiment, the thickness t1 of the flexible substrate 41 is greater than or equal to 0.05 mm and less than or equal to 0.1 mm.

[0100] The present application also provides a method for manufacturing a display module, the specific steps are as follows: Figure 5 As shown, Figure 5 Flow chart of a method for manufacturing a display module in one embodiment of the present application. Figure 5 As shown, the specific steps of the method for manufacturing the display module in this embodiment are as follows:

[0101] S510: Provide a stacked display screen body and a cover plate.

[0102] S520: attaching a protective cover to the side of the display screen away from the cover plate, and connecting the edge area of ​​the protective cover to the cover plate. The protective cover includes a flexible substrate and a hardening layer, and the hardening layer is located on the side of the flexible substrate away from the display screen.

[0103] The present embodiment provides a protective cover composed of a flexible substrate and a hardened layer. The protective cover covers the surface of the display screen away from the cover plate and the side wall of the display screen. It can be used to replace the metal protective cover in the related technology to improve the waterproof and airtight effect of the display module and enhance the pressure resistance of the display module. It also has the advantages of reducing the protective cover molding process and reducing costs.

[0104] In this embodiment, the protective cover is already formed by combining the flexible substrate and the hardening layer before being assembled to the display module. This method can simplify the assembly process of the display module, thereby further reducing the assembly difficulty.

[0105] In one embodiment, the flexible substrate comprises a polyethylene terephthalate film. First, the polyethylene terephthalate film has high tensile strength and tear strength, and its strength is comparable to that of an aluminum film, and is suitable for occasions where high-strength packaging materials are required. In the present embodiment, it is beneficial to enhance the supporting capacity of the protective cover. In addition, the polyethylene terephthalate film has excellent tolerance to most chemical reagents and can resist corrosion from common chemicals, except that it is easily hydrolyzed under strong alkali and certain hot water conditions. Again, the polyethylene terephthalate film has good barrier properties to oxygen and water vapor, and can be used to protect the package contents from the influence of external gases and moisture, and is particularly suitable for the protection of the display screen body in the present embodiment, and is used to block the influence of external water vapor on the display screen body.

[0106] In one embodiment, the hardened layer includes polyurethane glue. Polyurethane glue, also known as polyurethane adhesive, is an adhesive with excellent performance and is widely used in various industrial projects. Polyurethane glue has extremely high bonding strength and good toughness, can withstand large tensile and shear forces, and is suitable for a variety of structural bonding needs. Polyurethane glue has good weather resistance and can maintain bonding performance for a long time in outdoor environments. Polyurethane glue has good water resistance and is suitable for use in humid environments. It is suitable for isolating the display screen from external water vapor in this embodiment. Polyurethane glue expands when solidified, can fill gaps and form a tight seal, and is particularly suitable for uneven or porous surfaces. The cured polyurethane glue is flexible and can cope with shocks and vibrations. It is suitable for use as a hardened layer of the protective cover in this embodiment, thereby improving the supporting capacity and protective effect of the protective cover.

[0107] The present application also provides a method for manufacturing a display module, the specific steps are as follows: Figure 6 As shown, Figure 6 This is a flow chart of a method for manufacturing a display module in yet another embodiment of the present application.

[0108] Reference Figure 6 As shown, the specific steps of the method for manufacturing the display module in this embodiment are as follows:

[0109] S610: Provide a stacked display screen body and a cover plate.

[0110] S620: attaching a flexible substrate to a side of the display screen body facing away from the cover plate, and an edge area of ​​the flexible substrate is connected to the cover plate.

[0111] S630: preparing a hardening layer on a side of the flexible substrate away from the display screen body.

[0112] The present embodiment provides a protective cover composed of a flexible substrate and a hardened layer. The protective cover covers the surface of the display screen away from the cover plate and the side wall of the display screen. It can be used to replace the metal protective cover in the related technology to improve the waterproof and airtight effect of the display module and enhance the pressure resistance of the display module. It also has the advantages of reducing the protective cover molding process and reducing costs.

[0113] In this embodiment, during the process of assembling the display module, the protective cover is provided by first attaching the flexible substrate and then preparing a hardening layer on the flexible substrate. This method can make the protective cover more compact and have more outstanding water vapor barrier performance.

[0114] In one embodiment, preparing a hardening layer on a side of the flexible substrate away from the display screen includes:

[0115] A hardening material is sprayed on a side of the flexible substrate away from the display screen to form a hardening layer.

[0116] In one embodiment, the spraying thickness of the hardening material is greater than or equal to 10 micrometers and less than or equal to 20 micrometers.

[0117] In one embodiment, after spraying the hardening material on the side of the flexible substrate away from the display screen body, the method further comprises:

[0118] The hardening material sprayed to a specific position is cured to form a hardened layer. In this embodiment, the hardening layer is formed by the curing process, so that the hardening material can be quickly cured and the production efficiency can be improved.

[0119] In one embodiment, the curing treatment method includes UV curing or thermal curing. Among them, UV curing can be completed within a few seconds to a few minutes, which is suitable for high-speed production lines. In addition, UV curing can produce a high-quality surface effect, so that the cured hardened layer has good scratch resistance and chemical corrosion resistance. Thermal curing is suitable for a variety of materials, and the chemical bonds formed during the thermal curing process can make the cured material have higher bonding strength and durability. In addition, the thermal curing method can improve better cost-effectiveness.

[0120] In one embodiment, the flexible substrate comprises a polyethylene terephthalate film. First, the polyethylene terephthalate film has high tensile strength and tear strength, and its strength is comparable to that of an aluminum film, and is suitable for occasions where high-strength packaging materials are required. In the present embodiment, it is beneficial to enhance the supporting capacity of the protective cover. In addition, the polyethylene terephthalate film has excellent tolerance to most chemical reagents and can resist corrosion from common chemicals, except that it is easily hydrolyzed under strong alkali and certain hot water conditions. Again, the polyethylene terephthalate film has good barrier properties to oxygen and water vapor, and can be used to protect the package contents from the influence of external gases and moisture, and is particularly suitable for the protection of the display screen body in the present embodiment, and is used to block the influence of external water vapor on the display screen body.

[0121] In one embodiment, the hardened layer includes polyurethane glue. Polyurethane glue, also known as polyurethane adhesive, is an adhesive with excellent performance and is widely used in various industrial projects. Polyurethane glue has extremely high bonding strength and good toughness, can withstand large tensile and shear forces, and is suitable for a variety of structural bonding needs. Polyurethane glue has good weather resistance and can maintain bonding performance for a long time in outdoor environments. Polyurethane glue has good water resistance and is suitable for use in humid environments. It is suitable for isolating the display screen from external water vapor in this embodiment. Polyurethane glue expands when solidified, can fill gaps and form a tight seal, and is particularly suitable for uneven or porous surfaces. The cured polyurethane glue is flexible and can cope with shocks and vibrations. It is suitable for use as a hardened layer of the protective cover in this embodiment, thereby improving the supporting capacity and protective effect of the protective cover.

[0122] In one embodiment, the orthographic projection of the hardened layer on the cover plate covers the orthographic projection of the flexible substrate on the cover plate. With this arrangement, the hardened layer covers a larger area of ​​the display screen, which is more conducive to increasing the overall strength and support capacity of the protective cover. At the same time, this embodiment provides a protective cover composed of a flexible substrate and a hardened layer. The protective cover covers the surface of the display screen away from the cover plate and the side wall of the display screen. It can be used to replace the metal protective cover in the related art to improve the waterproof and gas-proof effect of the display module and enhance the pressure resistance of the display module. It also has the advantages of reducing the protective cover molding process and reducing costs.

[0123] In one embodiment, providing a stacked display screen and a cover plate includes:

[0124] A display screen, a polarizer, an optical adhesive layer and a cover plate are provided, which are stacked in sequence. The use of the polarizer can enhance the contrast of the display screen, making the black deeper and the white brighter, thereby improving the overall display effect. The optical adhesive layer can improve the stability of the display module structure, and because the optical adhesive layer has high light transmittance and low haze, it helps to reduce the scattering and reflection of light, thereby improving the brightness and contrast of the display module.

[0125] In one embodiment, the display module also includes an ink layer, which is attached to the edge area of ​​the cover plate close to the display screen. The ink layer is usually coated on the non-display area of ​​the display module to block the part that does not need to be displayed. It also plays a decorative role, making the appearance of the display module more neat and beautiful.

[0126] In one embodiment, a flexible substrate is attached to a side of the display screen away from the cover plate, and an edge area of ​​the flexible substrate is connected to the cover plate, including:

[0127] A flexible substrate is attached to the side of the display screen body facing away from the cover plate, and the edge area of ​​the flexible substrate is connected to the ink layer.

[0128] The present application also provides a display device, including any of the above display modules, or including a display module obtained by any of the above display module manufacturing methods. The display device can be any device with a display function, for example, a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA) and other mobile devices, and can also be a personal computer (PC), a television (TV), a teller machine or a self-service machine and other non-mobile devices.

[0129] It should be noted that in the drawings of the present application document, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0130] In addition, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0131] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display module, characterized in that: include: Display screen; A cover plate, located on one side of the display screen; as well as A protective cover, covering a surface of the display screen body away from the cover plate and a side wall of the display screen body, and connected to a surface of the cover plate close to the display screen body; Wherein, the protection cover comprises a flexible substrate and a hardening layer, and the hardening layer is located on a side of the flexible substrate away from the display screen body.

2. The display module according to claim 1, characterized in that: The orthographic projection of the hardened layer on the cover plate covers the orthographic projection of the flexible substrate on the cover plate; Preferably, the flexible substrate covers the surface of the display screen body away from the cover plate and the side wall of the display screen body, and is connected to the surface of the cover plate close to the display screen body; Preferably, the flexible substrate comprises a first part and a second part, the first part covers the surface of the display screen body away from the cover plate, the second part covers the side wall of the display screen body, and the hardening layer covers the first part and the second part; Preferably, the hardness of the hardened layer is greater than the hardness of the flexible substrate; Preferably, the thickness of the hardened layer is greater than or equal to the thickness of the flexible substrate; Preferably, the density of the hardened layer is greater than the density of the flexible substrate; Preferably, the thickness of the flexible substrate is greater than or equal to 0.05 mm and less than or equal to 0.1 mm; Preferably, the thickness of the hardened layer is greater than or equal to 0.05 mm and less than or equal to 0.2 mm; Preferably, the elastic modulus of the flexible substrate is greater than or equal to 2 GPa and less than or equal to 4 GPa; Preferably, the hardness of the flexible substrate is greater than or equal to 2H and less than or equal to 3H.

3. The display module according to claim 1, characterized in that: The cover plate includes a main body area and a frame area surrounding the main body area, and the protective cover is connected to the frame area; Preferably, the orthographic projection of the display screen on the cover plate is within the range of the main body area; Preferably, the display screen includes an organic light emitting display screen; Preferably, the display module further comprises an ink layer, the ink layer is attached to the frame area on the side of the cover plate close to the display screen, and the protective cover is connected to the surface of the ink layer close to the display screen.

4. The display module according to claim 1, characterized in that: The flexible substrate comprises an organic material; and / or the hardened layer comprises an organic material; Preferably, the flexible substrate comprises at least one of a polyethylene terephthalate film and a polyimide film; Preferably, the hardened layer includes at least one of a polyurethane adhesive layer and an epoxy adhesive layer; Preferably, the display module further comprises an adhesive layer, and the adhesive layer bonds the protective cover and the cover plate.

5. A display module, characterized in that: include: Display screen; A cover plate, located on one side of the display screen; as well as A protective cover, covering a surface of the display screen body away from the cover plate and a side wall of the display screen body, and connected to a surface of the cover plate close to the display screen body; The protective cover comprises an adhesive layer and a flexible substrate, wherein the adhesive layer is located on a side of the cover plate close to the display screen, the adhesive layer surrounds the side wall of the display screen, and the flexible substrate is located on a side of the adhesive layer and the display screen away from the cover plate.

6. The display module according to claim 5, characterized in that: The cover plate comprises a main body area and a frame area surrounding the main body area, and the adhesive layer bonds the flexible substrate to the frame area of ​​the cover plate; Preferably, the orthographic projection of the display screen on the cover plate is within the range of the main body area; Preferably, the display screen includes an organic light emitting display screen; Preferably, the flexible substrate comprises an organic material; Preferably, the flexible substrate comprises at least one of a polyethylene terephthalate film and a polyimide film; Preferably, the thickness of the adhesive layer is greater than or equal to the thickness of the display screen; Preferably, the surface of the adhesive layer away from the cover plate is flush with the surface of the display screen away from the cover plate; Alternatively, the distance between the surface of the adhesive layer away from the cover plate and the cover plate is greater than the distance between the surface of the display screen away from the cover plate and the cover plate; Preferably, the thickness of the flexible substrate is greater than or equal to 0.05 mm and less than or equal to 0.1 mm;.

7. A method for manufacturing a display module, characterized in that: include: Providing a stacked display screen body and a cover plate; Attaching a protective cover to a side of the display screen body facing away from the cover plate, and connecting an edge area of ​​the protective cover to the cover plate; Wherein, the protection cover comprises a flexible substrate and a hardening layer, and the hardening layer is located on a side of the flexible substrate away from the display screen body.

8. A method for manufacturing a display module, characterized in that: include: Providing a stacked display screen body and a cover plate; A flexible substrate is attached to a side of the display screen body facing away from the cover plate, and an edge area of ​​the flexible substrate is connected to the cover plate; A hardening layer is prepared on a side of the flexible substrate away from the display screen.

9. The manufacturing method according to claim 8, characterized in that: Preparing a hardening layer on a side of the flexible substrate away from the display screen body comprises: Spraying a hardening material on a side of the flexible substrate away from the display screen to form a hardening layer; Preferably, the orthographic projection of the hardened layer on the cover plate covers the orthographic projection of the flexible substrate on the cover plate.

10. A display device, characterized in that: A display module comprising any one of claims 1-6, or a display module obtained by the manufacturing method according to any one of claims 7-9.

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