A display module and an electronic device

Abstract

An embodiment of the present application provides a display module and an electronic device. The display module includes a flexible display functional stack and a flexible display cover plate disposed on the display functional stack. Wherein, the flexible display cover plate includes a substrate, and a first post-curing film layer is disposed on at least one side of the substrate, and / or the display functional stack includes a second post-curing film layer. By respectively disposing the first post-curing film layer and the second post-curing film layer in the flexible display cover plate and / or the display functional stack, the mechanical properties after curing of the first post-curing film layer and the second post-curing film layer are used to improve the impact resistance of the flexible display cover plate and / or the display functional stack, reduce the probability of the display cover plate cracking when being impacted, and at the same time alleviate the damage to the display functional stack caused by the impact, ensure the display effect of the display module, improve the use reliability of the display module and the user experience.

Description

Technical Field

[0001] This application relates to the technical field of terminals, and particularly relates to a display module and an electronic device. Background Art

[0002] Foldable terminal electronic devices based on flexible organic light-emitting diode (OLED) screens have been popular due to their high screen occupation ratio and clarity. Taking foldable mobile phones as an example, after folding, the mobile phone is only the size of a traditional mobile phone (5-6 inches), which is convenient to carry around, while when opened, it can have the display size of a tablet (7-8 inches). In addition to foldable screen mobile phones, flexible OLED screens also have great application prospects in other flexible electronic devices such as flexible wearable devices, foldable computers, and rollable TVs.

[0003] Currently, the flexible display module in flexible electronic devices usually includes a flexible display function laminate and a flexible display cover plate attached to the display function laminate, and the display cover plate mainly serves to protect the display function laminate. Among them, a common flexible display cover plate solution is to use one or several layers of bendable polymer films attached to the display function laminate through a soft glue. The good bendable properties of the polymer films, such as transparent polyimide (CPI) and polyethylene terephthalate (PET) with a thickness of less than 0.1 mm, can generally be bent to a curvature radius of less than 1 mm, so that the display module has good bendability.

[0004] However, in the above flexible display module, the polymer film has a relatively thin thickness and a low elastic modulus, and is easily penetrated when subjected to local impact, resulting in poor impact resistance. This causes the display cover plate to be easily broken, and may even cause damage and fragmentation of the display function laminate, reducing the impact resistance of the display module and possibly affecting the display performance of the display module. Summary of the Invention

[0005] This application provides a display module and an electronic device, which solve the problems that in the existing flexible display module, the display cover plate is easily broken, may even cause damage to the display function laminate, the impact resistance of the display module is poor, and it may affect the display performance of the display module.

[0006] An embodiment of this application provides a display module, including: a flexible display function laminate and a flexible display cover plate disposed on the display function laminate;

[0007] The flexible display cover plate includes a substrate, at least one side of the substrate is provided with a first post-cured film layer, and / or the display function stack includes a second post-cured film layer. In this way, the first post-cured film layer and the second post-cured film layer are respectively provided in the flexible display cover plate and / or the display function stack, and the mechanical properties of the first post-cured film layer and the second post-cured film layer after curing are used to improve the impact resistance of the flexible display cover plate and / or the display function stack, reduce the probability of the display cover plate breaking when impacted, and at the same time alleviate the damage of the impact to the display function stack, ensure the display effect of the display module, and improve the reliability of the display module and the user experience.

[0008] In addition, the post-cured film layer can be cured to different degrees after being bonded to the substrate to optimize the degree of curing and mechanical properties. The first post-cured film layer with high thickness and large modulus can be bonded to the surface of the substrate while ensuring the bending performance, ensuring better impact resistance and explosion-proof performance. At the same time, the first post-cured film can be cured to different degrees after being bonded to the substrate, and the degree of curing can be adjusted to optimize various properties such as surface performance and impact resistance. It has strong adjustability and high mass production.

[0009] In a possible implementation, the substrate is an ultra-thin glass plate or a polymer film layer. The display cover plate formed by the ultra-thin glass plate has a smoother surface and a higher texture. The ultra-thin glass plate itself has a certain strength and impact resistance, which helps to improve the impact resistance of the flexible display cover plate, improve the reliability of the display module, and ensure the display effect of the display module. The polymer film layer has good bendability and can improve the foldability of the display module. In addition, in the event of a rupture of the display module, the polymer film layer can also prevent the scattering of fragments or protrusions formed by the rupture of the display module, thereby avoiding harm to people.

[0010] In a possible implementation, the first post-curing film layer is located on the side of the substrate away from the display functional stack. That is, the first post-curing film layer can be located above the substrate to protect the substrate during impact, thereby protecting the display functional stack, and reducing the probability of damage to the substrate and the display functional stack.

[0011] In a possible implementation, the flexible display cover plate further includes a functional film layer, and the functional film layer is located on the side of the first post-cured film layer away from the display functional stack. That is, the functional film layer is located above the first post-cured film layer, and the first post-cured film layer is located between the display functional stack and the functional film layer, so that the functional film layer is located at the outermost side of the display module, and the functional film layer can protect the ultra-thin glass plate and the display functional stack located on the inner side, and at the same time, the functional film layer can also give the display module surface special functions (such as hydrophobicity, beautiful color change, etc.).

[0012] In a possible implementation, the first post-curing film layer is located between the substrate and the display function laminate. That is, the first post-curing film layer is located below the substrate and above the display function laminate. The first post-curing film layer has impact resistance performance and can still play a role in improving the impact resistance performance of the flexible display cover plate. At the same time, even if the substrate cracks under the impact, the first post-curing film layer is located between the substrate and the display function laminate, and the first post-curing film layer can play a good protective role for the display function laminate, reducing the damage to the display function laminate caused by impacts or broken fragments, ensuring the display effect, and reducing or avoiding the occurrence of phenomena such as display failure.

[0013] In a possible implementation, the flexible display cover plate further includes a functional film layer, and the functional film layer is located on the side of the substrate facing away from the display function laminate. In this way, the functional film layer is located on the outermost side of the display module, playing a protective role for the substrate, display function laminate, etc. located inside, and at the same time endowing the surface of the display module with special functions.

[0014] In a possible implementation, the first post-curing film layer includes a first post-curing layer and a second post-curing layer. The first post-curing layer is located on the side of the substrate facing away from the display function laminate, and the second post-curing layer is located between the substrate and the display function laminate. That is, both the upper and lower sides of the substrate have post-curing film layers, namely the first post-curing layer and the second post-curing layer. Both the first post-curing layer and the second post-curing layer have high impact resistance performance, jointly playing a protective role for the flexible display cover plate and the display function laminate, further improving the impact resistance performance of the display cover plate, that is, further enhancing the impact resistance reliability of the display module, reducing the probability of damage to the display function laminate, and ensuring the display performance of the display module.

[0015] In a possible implementation, the flexible display cover plate further includes a functional film layer, and the functional film layer is located on the side of the first post-curing layer facing away from the display function laminate. In this way, the functional film layer is located on the outermost side of the display module, playing a protective role for the substrate, display function laminate, etc. located inside, and at the same time realizing the functionalization of the surface of the display module.

[0016] In a possible implementation, the flexible display cover plate further includes a polymer film layer. The substrate is an ultra-thin glass plate, and the polymer film layer is located on the side of the substrate facing away from the display function laminate. The polymer film layer can provide certain impact resistance and further improve the impact resistance of the display cover plate. In addition, the polymer film layer is located above the substrate, and the polymer film layer can prevent the fragments or protrusions formed by the breaking of the substrate glass, etc. from scattering when being impacted, effectively avoiding harm to people.

[0017] In a possible implementation, the first post-curing film layer is located between the polymer film layer and the substrate. That is, the first post-curing film layer is located between the polymer film layer and the ultra-thin glass plate. The impact resistance of the first post-curing film layer can improve the impact resistance of the display cover plate, thereby improving the impact reliability of the display module.

[0018] In a possible implementation, the first post-curing film layer is located between the substrate and the display function stack. That is, the first post-curing film layer is located between the ultra-thin glass plate and the display function stack, and the polymer film layer is located above the ultra-thin glass plate. The first post-curing film layer can improve the impact resistance of the display cover plate. At the same time, the first post-curing film layer can play a good protective role for the display function stack, reducing the damage to the display function stack caused by impacts or broken fragments, ensuring the display effect, and reducing or avoiding the occurrence of phenomena such as display failure.

[0019] In a possible implementation, the first post-curing film layer includes a first post-curing layer and a second post-curing layer. The first post-curing layer is located between the polymer film layer and the substrate, and the second post-curing layer is located between the substrate and the display function stack. That is, post-curing film layers are provided on both sides of the substrate. The first post-curing layer and the second post-curing layer jointly protect the flexible cover plate and the display function stack, further improving the impact resistance of the display cover plate, enhancing the impact reliability of the display module, reducing the probability of damage to the display function stack, and ensuring the display performance of the display module.

[0020] In a possible implementation, the flexible cover plate further includes a functional film layer, and the functional film layer is located on the side of the polymer film layer facing away from the display function stack. In this way, the functional film layer is located on the outermost side of the display module. The functional film layer can protect the polymer film layer, ultra-thin glass plate, and display function stack located inside, and at the same time can realize the functionalization of the surface of the display module.

[0021] In a possible implementation, the first post-curing film layer is completely cured. That is, the first post-curing film layer has a high degree of curing. The first post-curing film layer with a high degree of curing has a high crosslinking degree, that is, it has stronger puncture resistance, effectively reducing the probability of an impact object piercing the surface of the display cover plate. In addition, the first post-curing film layer with a high degree of curing has a higher elastic modulus, which can provide better support, disperse the impact deformation to a wider range, and prevent the ultra-thin glass plate from undergoing local deformation and cracking.

[0022] In a possible implementation, the curing rate of the first post-curing film layer is 10%-90%. That is, the first post-curing film layer is in an incompletely cured state, which can ensure that both the ultra-thin glass plate and the display function stack have the best impact resistance and improve the impact resistance of the display cover plate.

[0023] In a possible implementation, the first post-curing layer is completely cured, and the curing rate of the second post-curing layer is 10%-90%. In this way, the impact resistance of the display cover plate can be effectively improved, the display cover plate can be protected from cracking, and at the same time, the deformation amount of the display module can be reduced.

[0024] In a possible implementation, the forming material of the first post-curing film layer and / or the second post-curing film layer is one of ultraviolet-curable or thermally curable polyurethane resin, acrylic resin, epoxy resin, amino resin, alkyd resin, silicone resin, polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA).

[0025] In a possible implementation, the forming material of the first post-curing film layer and / or the second post-curing film layer is an organic-inorganic hybrid material in which a resin material is doped with siloxane, silica, alumina, zirconia, graphene, diamond or other inorganic materials.

[0026] In a possible implementation, the display function laminate includes a support plate, and a back film, a light-emitting layer and a polarizer sequentially arranged on the support plate, that is, a back film is arranged above the support plate, the light-emitting layer is arranged above the back film, and the polarizer is arranged above the light-emitting layer.

[0027] In a possible implementation, the second post-curing film layer is located between the polarizer and the flexible display cover plate. That is, the second curing film layer is located above the entire display function laminate and close to the flexible display cover plate, which can play a good protective role for the display function laminate, reduce the damage to the display function laminate during impact, and reduce the occurrence of problems such as display failure.

[0028] In a possible implementation, the second post-curing film layer is located between the polarizer and the light-emitting layer. Specifically, there may be a first pressure-sensitive adhesive layer between the polarizer and the light-emitting layer, the polarizer and the light-emitting layer are adhered through the first pressure-sensitive adhesive layer, and the second post-curing film layer may be located between the polarizer and the first pressure-sensitive adhesive layer.

[0029] In a possible implementation, the second post-curing film layer is located between the light-emitting layer and the back film. Specifically, there may be a second pressure-sensitive adhesive layer between the light-emitting layer and the back film, the light-emitting layer and the back film are adhered through the second pressure-sensitive adhesive layer, and the second post-curing film layer may be located between the second pressure-sensitive adhesive layer and the back film.

[0030] In a possible implementation, the second post-curing film layer is located between the back film and the support plate.

[0031] In a possible implementation, there is an optical adhesive layer between the flexible display cover plate and the display function laminate, that is, the flexible display cover plate can be bonded to the display function laminate through an optical transparent adhesive such as OCA.

[0032] The embodiment of the present application also provides an electronic device, which at least includes the display module described in any one of the above. By including the display module, a first post-curing film layer and a second post-curing film layer are respectively provided in the flexible display cover plate and / or the display function laminate of the display module. The mechanical properties after curing of the first post-curing film layer and the second post-curing film layer are used to improve the impact resistance of the flexible display cover plate and / or the display function laminate, reduce the probability of the display cover plate cracking when being impacted, and at the same time relieve the damage to the display function laminate caused by the impact, ensuring the display effect of the display module. This helps to extend the service life of the electronic device, improve the use reliability of the electronic device and the user experience. Description of the Drawings

[0033] Figure 1 It is a schematic cross-sectional structure diagram of a display module provided in Embodiment 1 of the present application;

[0034] Figure 2 It is another schematic cross-sectional structure diagram of a display module provided in Embodiment 1 of the present application;

[0035] Figure 3 It is yet another schematic cross-sectional structure diagram of a display module provided in Embodiment 1 of the present application;

[0036] Figure 4 It is a schematic diagram of the pen-down test result of the first post-curing layer in yet another display module provided in Embodiment 1 of the present application;

[0037] Figure 5 It is a schematic diagram of the pen-down test result of the second post-curing layer in yet another display module provided in Embodiment 1 of the present application;

[0038] Figure 6 It is a schematic diagram of the influence of the curing degree of the second post-curing layer on the deformation amount of the display module in yet another display module provided in Embodiment 1 of the present application;

[0039] Figure 7 It is a schematic cross-sectional structure diagram of a display module provided in Embodiment 2 of the present application;

[0040] Figure 8 It is another schematic cross-sectional structure diagram of a display module provided in Embodiment 2 of the present application;

[0041] Figure 9 It is yet another schematic cross-sectional structure diagram of a display module provided in Embodiment 2 of the present application;

[0042] Figure 10Schematic cross-sectional structure diagram of a display module provided in Embodiment 3 of the present application;

[0043] Figure 11 Schematic cross-sectional structure diagram of another display module provided in Embodiment 3 of the present application;

[0044] Figure 12 Schematic cross-sectional structure diagram of yet another display module provided in Embodiment 3 of the present application;

[0045] Figure 13 Schematic cross-sectional structure diagram of a display module provided in Embodiment 4 of the present application;

[0046] Figure 14 Schematic cross-sectional structure diagram of another display module provided in Embodiment 4 of the present application;

[0047] Figure 15 Schematic cross-sectional structure diagram of yet another display module provided in Embodiment 4 of the present application;

[0048] Figure 16 Schematic cross-sectional structure diagram of yet another display module provided in Embodiment 4 of the present application.

[0049] Explanation of reference numerals:

[0050] 10 - Display cover plate; 11 - Substrate; 12 - First post-curing film layer;

[0051] 121 - First post-curing layer; 122 - Second post-curing layer; 13 - Functional film layer;

[0052] 14 - Polymer film layer; 15 - Adhesive layer; 20 - Display function stack;

[0053] 21 - Second post-curing film layer; 22 - Support plate; 23 - Back film;

[0054] 24 - Light-emitting layer; 25 - Polarizer; 26 - First pressure-sensitive adhesive layer;

[0055] 27 - Second pressure-sensitive adhesive layer; 30 - Optical adhesive layer. Detailed implementation manners

[0056] The terms used in the implementation manners part of the present application are only for explaining the specific embodiments of the present application, and are not intended to limit the present application.

[0057] The advent of foldable terminal electronic devices based on flexible organic light-emitting diode (OLED) screens has broken through the original limit that the display area ratio does not exceed 100%. By simply folding once, the efficiency of information interaction can be doubled. In the future, new designs such as multiple folds and scroll types can completely subvert the way of information interaction. Taking the foldable mobile phone as an example, after folding, the mobile phone is only the size of a traditional mobile phone (5-6 inches), which is convenient to carry around, while when opened, it can have the display size of a tablet (7-8 inches). In addition to foldable screen mobile phones, flexible OLED screens also have great application prospects in other flexible wearable devices, foldable computers, retractable TVs and other flexible electronic devices. In order to ensure bendability, flexible OLED screens use polymer films to replace the glass carrier plates in ordinary rigid screens. Lacking rigid support and protection, they are much more fragile than ordinary rigid screens and urgently need high-strength flexible cover plates to provide protection.

[0058] Currently, the most common flexible display cover plate solution is to use one or several layers of bendable polymer films bonded to the display module through soft glue. The biggest advantage of polymer films is their good bendable performance. For example, transparent polyimide (CPI) and polyethylene terephthalate (PET) with a thickness of less than 0.1 mm can generally be bent to a curvature radius of less than 1 mm. However, the thickness of polymer films is relatively thin, usually less than 100 μm, and their rigidity is poor, and the elastic modulus is relatively low, usually less than 8 GPa. When subjected to impacts (such as writing, bumping against the table corner, scratching with keys, etc.), the impact resistance of the display cover plate is poor, which is likely to cause the display cover plate to break, and may even cause damage to the display function stack, affecting the display of the display module, that is, reducing the impact resistance of the display module and may cause problems such as display failure.

[0059] Based on the above technical problems, the embodiments of the present application provide a display module, in which a first post-curing film layer and a second post-curing film layer are respectively arranged in the flexible display cover plate and / or the display function stack. The mechanical properties after curing of the first post-curing film layer and the second post-curing film layer are used to improve the impact resistance of the flexible display cover plate and / or the display function stack, reduce the probability of the display cover plate cracking when being impacted, and at the same time alleviate the damage to the display function stack caused by the impact, ensure the display effect of the display module, improve the use reliability of the display module and the user experience.

[0060] Among them, the display module can be applied to fixed terminals or mobile terminals with flexible displays such as mobile phones, tablet computers, laptop computers, handheld computers, touch TVs, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, etc. The following uses different embodiments to specifically illustrate the display module.

[0061] Embodiment 1

[0062] See Figure 1 As shown, the display module includes: a flexible display function stack 20 and a flexible display cover plate 10 disposed on the display function stack 20. Among them, the display function stack 20 refers to a layer group composed of film layers capable of realizing display functions. Specifically, the display function stack 20 may include a polarizer, a touch layer, a packaging layer, a light-emitting layer, a back film, a bottom support plate, etc. The display cover plate 10 is disposed on the display function stack 20. Specifically, the display cover plate 10 is located on the side of the display function stack 20 facing the display screen, and the display cover plate 10 mainly functions to protect the display function stack 20.

[0063] The flexible display function stack 20 and the flexible display cover plate 10 mean that the display function stack 20 and the display cover plate 10 are deformable and bendable, that is, the display function stack 20 and the display cover plate 10 can be folded when stressed, so as to realize the foldability of the display module. Among them, the display module can be folded once, or can also be folded multiple times, wound up, etc.

[0064] Among them, see Figure 1 As shown, the flexible display cover plate 10 includes a substrate 11, and at least one side of the substrate 11 is provided with a first post-curing film layer 12. The post-curing film layer refers to a type of polymer film that can still change the curing rate and its mechanical properties (such as performance parameters such as storage modulus, loss modulus, crosslinking degree, buffer rate, and energy absorption rate) by adjusting conditions such as light and temperature after the adhesive film is adhered. The cured first post-curing film layer 12 has high impact resistance, can improve the impact resistance of the flexible display cover plate 10, can effectively reduce the probability of the flexible display cover plate 10 being broken when impacted, thereby improving the impact resistance of the display module, and at the same time reducing the damage to the display function stack 20 caused by the impact, and ensuring the display effect of the display module.

[0065] In the embodiment of the present application, the first post-curing film layer 12 may be an ultraviolet post-curing film layer, a heat post-curing film layer, etc. For example, it may be an ultraviolet-cured or heat-cured polyurethane resin, acrylic resin, epoxy resin, amino resin, alkyd resin, silicone resin, polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), etc., or may also be an organic-inorganic hybrid adhesive film material doped with inorganic materials such as siloxane, silica, alumina, zirconia, graphene, or diamond in the above resin materials.

[0066] Taking the ultraviolet post-curing film layer as an example, after the heating and solvent volatilization of the adhesive film stock solution of the post-curing film layer, relatively good bonding ability remains, and it can be directly bonded to the substrate 11. After bonding, corresponding ultraviolet light can be selected for irradiation according to the absorption wavelength range of the adhesive film. As the irradiation time or irradiation dose increases, cross-linking reactions in the adhesive film continuously occur, the curing rate of the adhesive film increases, and the mechanical properties also change significantly. Therefore, the post-curing film layer can completely cure the adhesive film into a hard film similar to transparent polyimide (CPI) and polyethylene terephthalate (PET), or the post-curing film layer can also partially cure and then stop the curing reaction, making the adhesive film in any intermediate state between complete curing and non-curing.

[0067] To improve the hardness and impact resistance of the flexible cover plate, in the prior art, a flexible impact-resistant or explosion-proof coating is also coated on the surface of the substrate. This coating needs to ensure the impact resistance, explosion-proof performance, and bendability of the substrate at the same time. Usually, the thickness of the coating is between 10um and 50um. When the coating thickness is relatively thin, it cannot effectively protect the cover plate from being fragile during impact. When the coating thickness is relatively thick, the texture of the cover plate will decline, and it is easy to crack during bending. In addition, the properties of the coating need to be continuously adjusted to optimize various properties such as surface performance and impact resistance. However, once the post-curing coating is directly completely cured after coating, the performance cannot be adjusted and optimized, and the mass production performance is relatively low.

[0068] In the embodiment of the present application, after the substrate 11 and the first post-curing film layer 12 are bonded, the first post-curing film layer 12 can be cured to different degrees to optimize the curing degree and mechanical properties. Compared with coating a thin coating on the surface of the substrate 11, a first post-curing film layer 12 with a high modulus of elasticity and a large thickness can be bonded to the surface of the substrate 11 while ensuring the bending performance, ensuring better impact resistance and explosion-proof performance. At the same time, the first post-curing film layer 12 can be cured to different degrees after being bonded to the substrate 11. The surface performance, impact resistance, and other various properties can be optimized by adjusting the curing degree, and the adjustability is relatively strong, with high mass production performance.

[0069] In addition, the adhesive film stock solution of the post-curing film layer has a certain bonding ability and can be directly bonded to the substrate 11 such as an ultra-thin glass plate. Other film layers such as the functional film layer 13 can also be directly bonded to the first post-curing film layer 12. In this way, the use of an adhesive layer such as an optical clear adhesive (OCA) and other soft adhesives can be reduced or avoided, which can improve the flatness of the surface of the flexible display cover plate 10, reduce the risk of the film being easily pierced, and effectively reduce the thickness of the flexible display cover plate 10 while ensuring the impact reliability.

[0070] See Figure 1As shown, in the embodiment of the present application, there is an optical adhesive layer 30 between the flexible display cover plate 10 and the display function laminate 20. That is, the flexible display cover plate 10 can be adhered to the display function laminate 20 through an optical transparent adhesive such as OCA.

[0071] Among them, in the embodiment of the present application, the substrate 11 can be an ultra-thin glass plate, and the thickness of the ultra-thin glass plate is less than or equal to 0.1 mm. Through the ultra-thin glass processing technology, the common display glass plate can achieve repeated bending with a bending radius of less than 5 mm. Compared with the polymer film layer substrate, the surface of the display cover plate 10 formed by the ultra-thin glass plate is flatter and has a higher surface texture. The ultra-thin glass plate itself has a certain strength and impact resistance, which helps to improve the impact resistance of the flexible display cover plate 10, improve the reliability of the display module, and ensure the display effect of the display module.

[0072] See Figure 1 As shown, in a possible implementation manner, the first post-curing film layer 12 is located on the side of the substrate 11 facing away from the display function laminate 20. When in use, the side of the display function laminate 20 facing the user is the upper side, and the opposite side is the lower side. That is, the first post-curing film layer 12 is located above the ultra-thin glass plate, which plays a role in protecting the ultra-thin glass plate and thus protecting the display function laminate 20 during impact, reducing the probability of damage to the ultra-thin glass plate and the display function laminate 20.

[0073] The flexible display cover plate 10 further includes a functional film layer 13. Specifically, the functional film layer 13 refers to a film layer that can endow the display cover plate 10 with certain functions, such as explosion-proof, waterproof, and aesthetics. The functional film layer 13 is located on the side of the first post-curing film layer 12 facing away from the display function laminate 20, that is, the functional film layer 13 is located above the first post-curing film layer 12, and the first post-curing film layer 12 is located between the display function laminate 20 and the functional film layer 13. That is, the functional film layer 13 is located on the outermost side of the display module, and the functional film layer 13 can protect the ultra-thin glass plate, the display function laminate 20, etc. located inside, and at the same time, the functional film layer 13 can also endow the surface of the display module with special functions (such as hydrophobicity, color change and aesthetics).

[0074] Among them, the functional film layer 13 can be a film layer that can achieve one function, or it can also be a laminate of multiple functional film layers 13. The functional film layer 13 can be formed on the first post-curing film layer 12 by a direct coating method, or it can also be formed by an OCA lamination method, and a polymer film with this function is laminated on the first post-curing film layer 12.

[0075] Specifically, taking the formation of a functional film layer 13 on the first post-curing film layer 12 to improve the hardness and hydrophobic performance of the surface of the display cover plate 10 as an example, the functional film layer 13 may include a hardening layer and a hydrophobic layer. The hardening layer and the hydrophobic layer can be jointly coated on the first post-curing film layer 12 to form a functional film layer 13. Alternatively, a hardening layer can be first coated on the first post-curing film layer 12, and then a hydrophobic layer can be coated on the hardening layer. The thickness of the functional film layer 13 can be between 1 μm and 20 μm, the pencil hardness ≥ HB, the water contact angle ≥ 100°, and the friction coefficient < 0.1, so as to further improve the scratch resistance and oil resistance of the surface of the flexible display cover plate 10.

[0076] In the embodiment of the present application, the first post-curing film layer 12 can be fully cured. That is, after the post-curing adhesive film is bonded to the ultra-thin glass plate and the functional film layer 13, the curing rate of the first post-curing film layer 12 can be adjusted to be close to 100% by adjusting the curing conditions. The first post-curing film layer 12 with a high degree of curing has a high cross-linking degree and thus has stronger impact resistance, which can effectively prevent the impact object from piercing the surface of the ultra-thin glass plate. In addition, the first post-curing film layer 12 with a high degree of curing has a relatively high elastic modulus, which can provide a better supporting effect, disperse the impact deformation generated during the impact process to a wider range, and prevent local deformation and cracking of the ultra-thin glass plate. At the same time, it can also improve the flatness of the surface of the flexible display cover plate 10 and reduce the probability of indentation and scratches.

[0077] The elastic modulus of the fully cured first post-curing film layer 12 can be between 10 MPa and 10 GPa, the loss modulus is between 1 MPa and 1 GPa, the thickness is between 10 - 200 μm, the light transmittance of the first post-curing film layer 12 can be greater than 85%, the haze and yellowness index are less than 2%, and the 180° peel strength from the glass surface is greater than 4 N / cm.

[0078] See Figure 2 As shown, in another possible implementation, the first post-curing film layer 12 is located between the substrate 11 and the display function stack 20, that is, the first post-curing film layer 12 is located below the ultra-thin glass plate and above the display function stack 20. The impact resistance of the first post-curing film layer 12 can still play a role in improving the impact resistance of the flexible display cover plate 10. At the same time, even if the substrate 11 breaks under the impact, since the first post-curing film layer 12 is located between the substrate 11 and the display function stack 20, the first post-curing film layer 12 can play a good protective role for the display function stack 20, reduce the damage to the display function stack 20 caused by impacts or broken fragments, ensure the display effect, and reduce or avoid the occurrence of phenomena such as display failure.

[0079] Among them, see Figure 2As shown, the functional film layer 13 is located on the side of the substrate 11 facing away from the display functional stack 20, that is, the functional film layer 13 is located above the ultra-thin glass plate. Similarly, the functional film layer 13 can be located on the outermost side of the display module, playing a role in protecting the ultra-thin glass plate, the display functional stack 20, etc. located inside, and at the same time endowing the surface of the display module with special functions.

[0080] Among them, the curing rate of the first post-curing film layer 12 is 10%-90%, that is, the first post-curing film layer 12 is not completely cured. This is because the first post-curing film layer 12 is located below the substrate 11. Taking the substrate 11 as an ultra-thin glass plate as an example, if the hardness of the first post-curing film layer 12 below the ultra-thin glass plate is low, there may be no good support for the ultra-thin glass plate, which may cause the overall deformation of the ultra-thin glass plate to be too large when it is impacted and lead to fragmentation. If the hardness of the first post-curing film layer 12 is high, although the overall deformation of the ultra-thin glass plate can be reduced, the ultra-thin glass plate will be in a state of being clamped by hard objects on both the upper and lower sides, which may cause excessive local stress on the ultra-thin glass plate and lead to fragmentation. Therefore, making the first post-curing film layer 12 located below the substrate 11 not completely cured, but cured to an intermediate state of 10%-90% can ensure that both the ultra-thin glass plate and the display functional stack 20 have the best impact resistance performance and improve the impact resistance performance of the display cover plate 10.

[0081] The elastic modulus of the first post-curing film layer 12 after partial curing can be between 10 MPa and 1 GPa, the loss modulus is between 1 MPa and 1 GPa, the thickness is between 10-200 μm, the light transmittance > 85%, the haze and yellowness index < 2%, and the 180° peel force from the glass surface > 4 N / cm. When optimizing the curing rate of the first post-curing film layer 12, multiple parameters such as the impact force, the impact deformation buffer rate, and the energy absorption index should also be considered. Among them, the buffer rate of the impact force and impact deformation of the first post-curing film layer 12 after partial curing can be between 5% and 90%.

[0082] See Figure 3 As shown, in another possible implementation, post-curing films can be provided on both sides of the substrate 11. Specifically, such as Figure 3As shown in the figure, the first post-curing film layer 12 includes a first post-curing layer 121 and a second post-curing layer 122. Among them, the first post-curing layer 121 is located on the side of the substrate 11 away from the display function stack 20, and the second post-curing layer 122 is located between the substrate 11 and the display function stack 20. That is, post-curing film layers are provided on both the upper and lower sides of the ultra-thin glass plate, namely the first post-curing layer 121 and the second post-curing layer 122 respectively. Both the first post-curing layer 121 and the second post-curing layer 122 have high impact resistance performance, jointly playing a protective role for the flexible display cover plate 10 and the display function stack 20, further improving the impact resistance performance of the display cover plate 10, that is, further enhancing the impact resistance reliability of the display module, reducing the probability of damage to the display function stack 20, and ensuring the display performance of the display module.

[0083] Among them, the first post-curing layer 121 can be completely cured. Refer to Figure 4 and Figure 5 As shown in the figure, in the embodiment of the present application, taking the first post-curing layer 121 and the second post-curing layer 122 as ultraviolet curing film layers as an example, after the first post-curing layer 121 is attached above the ultra-thin glass, the first post-curing layer 121 is cured to different degrees, and the influence of the curing degree on the elastic modulus is studied. Other mechanical parameters affecting the impact performance, such as loss modulus, buffer rate, energy absorption rate, and adhesion, etc., can also be optimized and designed according to a similar method.

[0084] Specifically, an LED with a wavelength of 365 nm can be used for irradiation, and the irradiation energies are 0.5 J / cm 2 , 1 J / cm 2 , 1.5 J / cm 2 , 2 J / cm 2 , as Figure 4 shown in the figure, the elastic moduli of the first post-curing layer 121 after irradiation are 0.3 MPa, 5 MPa, 50 MPa, and 900 MPa respectively. When the thickness of the first post-curing layer 121 is 100 um, a 11 g neutral pen is used for the pen-down test, and it is found that the critical pen-down heights corresponding to the fracture of the display cover plate 10 formed by the 70 um ultra-thin glass plate and the first post-curing layer 121 are 5 cm, 8 cm, 12 cm, and 18 cm respectively.

[0085] That is, as the curing degree of the first post-curing layer 121 above the ultra-thin glass plate increases, the curing modulus increases, and the ability of the display cover plate 10 to resist pen-down impact is significantly improved. At the same time, the first post-curing layer 121 with a high curing degree has a high crosslinking degree, that is, it has stronger anti-piercing performance, effectively reducing the probability of the impact object piercing the surface of the display cover plate 10. In addition, the first post-curing layer 121 with a high curing degree has a higher elastic modulus, which can provide better support, disperse the impact deformation to a wider range, and avoid local deformation and fracture of the ultra-thin glass plate.

[0086] The curing rate of the second post-curing layer 122 can be 10%-90%. The second post-curing layer 122 is bonded under the ultra-thin glass. Refer to Figure 5 As shown, 365nm LEDs can also be used to irradiate 0.5J / cm 2 , 1J / cm 2 , 1.5J / cm 2 , 2J / cm 2 . After irradiation, the elastic modulus of the second post-curing layer 122 changes from 0.3MPa to 900MPa. The result of the pen-down test shows that as the cured modulus increases from 0.3MPa to 5MPa, the fracture height of the cover plate 10 in the pen-down test increases from 15cm to 30cm. However, as the cured modulus further increases to 50MPa and 900MPa, the critical pen-down height decreases from 30cm to 25cm and 10cm. That is, when the second post-curing layer 122 is in an incompletely cured state, the display cover plate 10 has better impact resistance.

[0087] Refer to Figure 6 As shown, computer simulation can be performed on the display module structure as in Figure 3 , and the deformation of the display module of the second post-curing layer 122 at different curing degrees can be calculated using the relevant data packets of ABAQUS / explicit. Refer to Figure 6 As shown, as the cured elastic modulus increases, the deformation of the pen-down display module first decreases and reaches the minimum near 50MPa, about 0.21%. As the cured modulus of the second post-curing layer 122 reaches 900MPa, the deformation of the display module rapidly increases to 0.38%. Therefore, when the elastic modulus of the second post-curing layer 122 is near 50MPa, the display module has the smallest deformation and is least likely to have problems such as display failure of the display module. In summary, in the embodiment of the present application, the curing rate of the second post-curing layer 122 is 10%-90%, which can effectively improve the impact resistance of the display cover plate 10, protect the display cover plate 10 from cracking, and at the same time reduce the deformation of the display module.

[0088] The forming materials of the first post-curing layer 121 and the second post-curing layer 122 can be the same, or the forming materials of the first post-curing layer 121 and the second post-curing layer 122 can be different.

[0089] Refer to Figure 3 As shown, in the embodiment of the present application, the functional film layer 13 is located on the side of the first post-curing layer 121 facing away from the display functional stack 20, that is, the functional film layer 13 is located above the first post-curing layer 121. Similarly, the functional film layer 13 can be located on the outermost side of the display module, playing a role in protecting the ultra-thin glass plate, display functional stack 20, etc. located inside, and at the same time realizing the functionalization of the surface of the display module.

[0090] Example Two

[0091] Different from Example One, in the embodiment of the present application, the substrate 11 is a polymer film layer, and a first post-cured film layer 12 is provided on at least one side of the polymer film layer. The polymer film layer has good bendability, which can improve the foldability of the display module. The first post-cured film layer 12 can improve the impact resistance reliability of the display cover plate, thereby improving the impact resistance reliability of the display module, and at the same time ensuring the display effect of the display module.

[0092] In addition, in the case where the display module is broken, the setting of the polymer film layer can also prevent the fragments or protrusions formed by the breakage of the display module from scattering, avoiding harm to people.

[0093] Among them, the polymer film layer can be transparent polyimide (CPI), polyethylene terephthalate (PET), polyarylene, polyethylene naphthalate (PEN), polycarbonate (PC), polymethyl methacrylate (PMMA), thermoplastic polyurethane elastomer rubber (TPU), etc. The thickness of the polymer film layer can be 10-200 μm.

[0094] See Figure 7 As shown, in a possible implementation manner, the first post-cured film layer 12 is located on the side of the polymer film layer away from the display function stack 20, that is, the first post-cured film layer 12 is located above the polymer film layer, playing a role in protecting the polymer film layer and the display function stack 20 during impact.

[0095] The flexible display cover plate 10 further includes a functional film layer 13. The functional film layer 13 can be located above the first post-cured film layer 12. See Figure 7 As shown, that is, the functional film layer 13 is located on the outermost side of the display module, playing a role in protecting the polymer film layer, the display function stack 20, etc. located on the inner side.

[0096] Among them, the forming material, forming method, and film layer parameters of the functional film layer 13 can refer to Example One, and will not be elaborated in the embodiment of the present application.

[0097] Among them, the first post-cured film layer 12 can be fully cured, so that the first post-cured film layer 12 located above the polymer film layer has stronger impact resistance, can effectively prevent the impact object from piercing the surface of the display cover plate 10, and at the same time can provide a better supporting effect, dispersing the impact deformation generated during the impact to a wider range, and avoiding local deformation and fragmentation of the polymer film layer. The forming material of the first post-cured film layer 12 and the mechanical parameters after the first cured film layer is cured can also refer to Example One, and will not be elaborated here.

[0098] SeeFigure 8 As shown, in another possible implementation, the first post-curing film layer 12 is located between the polymer film layer and the display function stack 20, that is, the first post-curing film layer 12 is located below the polymer film layer and above the display function stack 20. While improving the impact resistance of the flexible display cover plate 10, it can play a good protective role for the display function stack 20 to reduce the damage to the display function stack 20 caused by impact and ensure the display effect of the display module.

[0099] Among them, referring to Figure 8 As shown, the functional film layer 13 can be located on the side of the polymer film layer facing away from the display function stack 20, that is, the functional film layer 13 is located above the polymer film layer, which is also located on the outermost side of the display module, playing a protective role for the polymer film layer, the display function stack 20, etc. located inside, and at the same time realizing the functionalization of the surface of the display module.

[0100] Among them, the curing rate of the first post-curing film layer 12 can be 10%-90%, that is, the first post-curing film layer 12 is not completely cured to ensure that the polymer film layer 14 and the display function stack 20 have the best impact resistance, improve the impact resistance of the display cover plate 10, and further ensure the impact resistance reliability of the display module.

[0101] Referring to Figure 9 As shown, in yet another possible implementation, post-curing film layers can be provided on both sides of the polymer film layer. For example, the first post-curing film layer 12 includes a first post-curing layer 121 and a second post-curing layer 122. The first post-curing layer 121 is located on the side of the high-molecular film layer facing away from the display function stack 20, and the second post-curing layer 122 is located between the polymer film layer and the display function stack 20. The first post-curing layer 121 and the second post-curing layer 122 jointly play a protective role for the flexible display cover plate 10 and the display function stack 20, further improving the impact resistance of the display cover plate 10, enhancing the impact resistance reliability of the display module, reducing the probability of damage to the display function stack 20, and ensuring the display performance of the display module.

[0102] Among them, the first post-curing layer 121 can be completely cured, and the curing rate of the second post-curing layer 122 can be 10%-90%. In this way, the impact resistance of the display cover plate 10 can be effectively improved, the display cover plate 10 can be ensured not to break, and at the same time, the deformation amount of the display module can be reduced, and the impact on the display effect of the display module can be reduced.

[0103] Referring to Figure 9As shown, the functional film layer 13 is located on the side of the first post-curing layer 121 away from the display functional stack 20, that is, the functional film layer 13 is located above the first post-curing layer 121. In this way, the functional film layer 13 is located on the outermost side of the display module, protecting the polymer film layer and the display functional stack 20 located inside, and at the same time realizing the functionalization of the surface of the display module.

[0104] Embodiment III

[0105] In the embodiment of the present application, different from Embodiment I, the flexible display cover plate 10 further includes a polymer film layer 14. The substrate 11 can be an ultra-thin glass plate. The polymer film layer 14 is located on the side of the substrate 11 away from the display functional stack 20, that is, the polymer film layer 14 is located above the ultra-thin glass plate.

[0106] Among them, the polymer film layer 14 can also provide a certain degree of impact resistance, further improving the impact resistance of the display cover plate 10. In addition, the polymer film layer 14 is located above the ultra-thin glass plate, and the polymer film layer 14 can prevent the scattering of fragments or protrusions formed by the breakage of the ultra-thin glass when being impacted, effectively avoiding harm to people.

[0107] The thickness of the polymer film layer 14 can be 10-200 μm, and the forming material of the polymer film layer 14 can be transparent polyimide (CPI), polyethylene terephthalate (PET), polyaramid, polyethylene naphthalate (PEN), polycarbonate (PC), polymethyl methacrylate (PMMA), thermoplastic polyurethane elastomer rubber (TPU), etc.

[0108] In the embodiment of the present application, the functional film layer 13 is located on the side of the polymer film layer 14 away from the display functional stack 20, that is, the functional film layer 13 is located above the polymer film layer 14. In this way, the functional film layer 13 is located on the outermost side of the display module, and the functional film layer 13 can protect the polymer film layer 14, the ultra-thin glass plate, and the display functional stack 20 located inside, and at the same time can realize the functionalization of the surface of the display module.

[0109] Among them, referring to Figure 10 As shown, in a possible implementation manner, the first post-curing film layer 12 is located between the polymer film layer 14 and the substrate 11, that is, the first post-curing film layer 12 is located between the polymer film layer 14 and the ultra-thin glass plate. The impact resistance of the first post-curing film layer 12 can improve the impact resistance of the display cover plate 10, and further improve the impact resistance reliability of the display module.

[0110] Among them, the first post-curing film layer 12 and the polymer film layer 14 can be bonded through an optical adhesive such as OCA, that is, a polymer film layer 14 can be attached to the first post-curing film layer 12, such as Figure 10As shown, there is an adhesive layer 15 between the polymer film layer 14 and the first post-curing film layer 12. The adhesive layer 15 between the display cover plate 10 and the display function laminate 20 can be the same or different from the optical adhesive layer 30.

[0111] The first post-curing film layer 12 can be fully cured to make the display module have stronger impact resistance, ensure that the display cover plate 10 will not break, and at the same time improve the surface flatness of the display cover plate 10 and reduce the probability of indentation and scratches. For the forming material of the first post-curing film layer 12 and the parameters after curing, reference can be made to Embodiment 1, which will not be elaborated in the embodiments of the present application.

[0112] See Figure 11 As shown, in another possible implementation, the first post-curing film layer 12 is located between the substrate 11 and the display function laminate 20, that is, the first post-curing film layer 12 is located between the ultra-thin glass plate and the display function laminate 20, and the polymer film layer 14 is located above the ultra-thin glass plate. The first post-curing film layer 12 can improve the impact resistance of the display cover plate 10. At the same time, the first post-curing film layer 12 can play a good protective role for the display function laminate 20, reduce the damage to the display function laminate 20 caused by impacts or broken fragments, ensure the display effect, and reduce or avoid the occurrence of phenomena such as display failure.

[0113] Among them, the first post-curing film layer 12 can be incompletely cured, and its curing rate can be 10%-90% to ensure that the polymer film layer 14 and the display function laminate 20 have the best impact resistance, improve the impact resistance of the display cover plate 10, and further ensure the impact reliability of the display module.

[0114] See Figure 11 As shown, the polymer film layer 14 and the ultra-thin glass plate can be bonded through an optical adhesive such as OCA, that is, a polymer film layer 14 can be attached to the ultra-thin glass plate, such as Figure 11 As shown, there is an adhesive layer 15 between the polymer film layer 14 and the ultra-thin glass plate.

[0115] See Figure 12 As shown, in yet another possible implementation, post-curing film layers can be provided on both sides of the substrate 11. For example, the first post-curing film layer 12 includes a first post-curing layer 121 and a second post-curing layer 122. The first post-curing layer 121 is located between the polymer film layer 14 and the substrate 11, and the second post-curing layer 122 is located between the substrate 11 and the display function laminate 20. The first post-curing layer 121 and the second post-curing layer 122 jointly play a protective role for the flexible cover plate and the display function laminate 20, further improve the impact resistance of the display cover plate 10, enhance the impact reliability of the display module, reduce the probability of damage to the display function laminate 20, and ensure the display performance of the display module.

[0116] Among them, the first post-curing layer 121 can be completely cured, and the curing rate of the second post-curing layer 122 can be 10%-90%. In this way, the impact resistance of the display cover plate 10 can be effectively improved to ensure that the display cover plate 10 does not break, and at the same time, the deformation amount of the display module can be reduced, and the impact on the display effect of the display module can be reduced.

[0117] Embodiment 4

[0118] In the embodiment of the present application, the display function stack 20 includes a second post-curing film layer 21. The display function stack 20 is a stack group composed of film layers capable of realizing display functions. The second post-curing film layer 21 can be set between any two layers, or the second post-curing film layer 21 can replace one or several of them. The second post-curing film layer 21 has high impact resistance, which can improve the impact resistance of the flexible display function stack 20, and further improve the impact resistance of the display module, and can reduce or avoid the damage to the display function stack 20 when being impacted, and ensure the display effect of the display module.

[0119] Specifically, in the embodiment of the present application, refer to Figure 13 As shown, the display function stack 20 includes a support plate 22, and a back film 23, a light-emitting layer 24, and a polarizer 25 are sequentially arranged on the support plate 22, that is, the back film 23 is arranged above the support plate 22, the light-emitting layer 24 is arranged above the back film 23, and the polarizer 25 is arranged above the light-emitting layer 24.

[0120] In a possible implementation manner, as Figure 13 shown, the second post-curing film layer 21 is located between the polarizer 25 and the flexible display cover plate 10, that is, the second curing film layer is located above the entire display function stack 20 and close to the flexible display cover plate 10, which can play a good protective role for the display function stack 20, reduce the damage to the display function stack 20 during impact, and reduce the occurrence of problems such as display failure.

[0121] Refer to Figure 14 shown, the second post-curing film layer 21 can be located between the polarizer 25 and the light-emitting layer 24. Specifically, there can be a first pressure-sensitive adhesive layer 26 between the polarizer 25 and the light-emitting layer 24. The polarizer 25 and the light-emitting layer 24 are adhered through the first pressure-sensitive adhesive layer 26, and the second post-curing film layer 21 can be located between the polarizer 25 and the first pressure-sensitive adhesive layer 26.

[0122] Refer to Figure 15 shown, the second post-curing film layer 21 can also be located between the light-emitting layer 24 and the back film 23. Specifically, there can be a second pressure-sensitive adhesive layer 27 between the light-emitting layer 24 and the back film 23. The light-emitting layer 24 and the back film 23 are adhered through the second pressure-sensitive adhesive layer 27, and the second post-curing film layer 21 can be located between the second pressure-sensitive adhesive layer 27 and the back film 23.

[0123] See Figure 16 As shown, the second post-curing film layer 21 can also be located between the back film 23 and the support plate 22. Specifically, the setting position of the second post-curing film can be selected and set according to design requirements. The curing state of the second post-curing film can also be selected and set according to specific strength requirements.

[0124] The forming material of the second post-curing film layer 21 can be the same as that of the first post-curing film layer 12, or it can be different. The second post-curing film layer 21 can be an ultraviolet post-curing film layer, a heat post-curing film layer, etc. Specifically, it can be a polyurethane resin, an acrylic resin, an epoxy resin, an amino resin, an alkyd resin, a silicone resin, etc. that are ultraviolet-cured or thermally cured, or it can also be an organic-inorganic hybrid film material in which inorganic materials such as siloxane, silica, alumina, zirconia, graphene or diamond are doped in the above resin materials.

[0125] In the embodiments of the present application, by providing a post-curing film layer in the flexible display cover plate 10 and / or the flexible display function laminate 20, the impact resistance of the display cover plate 10 and / or the display function laminate 20 is improved. It should be noted that the post-curing film layer can also be applied to the back surface of the display module in the flexible electronic device (such as in the back cover), adding a post-curing film layer or replacing a certain film layer therein. It can also be applied to flexible circuit boards and any other flexible laminates that can be rolled up or folded.

[0126] The embodiments of the present application also provide an electronic device, which at least includes the display module in any one of Embodiments 1 to 4. Among them, the electronic device can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a touch TV, a walkie-talkie, a netbook, a POS machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, etc., which are fixed terminals or mobile terminals with flexible displays.

[0127] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0128] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims, and drawings of the embodiments of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that, include: A flexible display function stack and a flexible display cover plate arranged on the display function stack; The flexible display cover comprises a substrate, and a first post-curing film layer is disposed on at least one side of the substrate; the post-curing film layer refers to a type of polymer film whose curing rate can be changed after the adhesive film is attached; The first post-cured film layer comprises a first post-cured layer and a second post-cured layer, the first post-cured layer is located on a side of the substrate away from the display function stack, and the second post-cured layer is located between the substrate and the display function stack; The first post-cured layer is completely cured, and the curing rate of the second post-cured layer is 10%-90%.

2. The display module according to claim 1, characterized in that, The substrate is an ultra-thin glass plate or a polymer film layer.

3. The display module according to claim 2, characterized in that, The first post-curing film layer is located on a side of the substrate facing away from the display function stack.

4. The display module according to claim 3, characterized in that, The flexible display cover plate further includes a functional film layer, and the functional film layer is located on a side of the first post-curing film layer away from the display functional stack.

5. The display module according to claim 2, characterized in that, The first post-curing film layer is located between the substrate and the display function stack.

6. The display module according to claim 5, characterized in that, The flexible display cover further includes a functional film layer, and the functional film layer is located on a side of the substrate away from the display functional stack.

7. The display module according to claim 1, characterized in that, The display function stack includes a second post-curing film layer.

8. The display module according to claim 1, characterized in that, The flexible display cover further includes a functional film layer, and the functional film layer is located on a side of the first post-curing layer away from the display functional stack.

9. The display module according to claim 1, characterized in that, The flexible display cover plate further includes a polymer film layer, the substrate is an ultra-thin glass plate, and the polymer film layer is located on a side of the substrate away from the display function stack.

10. The display module according to claim 9, characterized in that, The first post-curing film layer is located between the polymer film layer and the substrate.

11. The display module according to claim 9, characterized in that, The first post-curing film layer is located between the substrate and the display function stack.

12. The display module according to claim 9, characterized in that, The first post-curing layer is located between the polymer film layer and the substrate, and the second post-curing layer is located between the substrate and the display function stack.

13. The display module according to any one of claims 10 - 12, characterized in that, The flexible display cover plate further comprises a functional film layer, and the functional film layer is located on a side of the polymer film layer away from the display functional stack.

14. The display module according to claim 3 or 10, characterized in that, The first post-cured film layer is completely cured.

15. The display module according to claim 5 or 11, characterized in that, The curing rate of the first post-curing film layer is 10%-90%.

16. The display module according to claim 1, characterized in that, The display function stack comprises a support plate, and a back film, a light emitting layer and a polarizer which are sequentially arranged on the support plate.

17. The display module according to claim 7, characterized in that, The molding material of the first post-cured film layer and / or the second post-cured film layer is one of UV-curing or heat-curing polyurethane resin, acrylic resin, epoxy resin, amino resin, alkyd resin, silicone resin, polyvinyl butyral (PVB), and ethylene-vinyl acetate copolymer (EVA).

18. The display module according to claim 17, characterized in that, The molding material of the first post-cured film layer and / or the second post-cured film layer is an organic-inorganic hybrid material in which siloxane, silicon dioxide, aluminum oxide, zirconium oxide, graphene, diamond or other inorganic materials are doped into a resin material.

19. The display module according to claim 7, wherein, The display function stack comprises a support plate, and a back film, a light emitting layer and a polarizer which are sequentially arranged on the support plate.

20. The display module according to claim 19, wherein, The second post-curing film layer is located between the polarizer and the flexible display cover.

21. The display module according to claim 19, wherein, The second post-cured film layer is located between the polarizer and the light-emitting layer.

22. The display module according to claim 19, wherein, The second post-curing film layer is located between the light-emitting layer and the back film.

23. The display module according to claim 19, wherein, The second post-curing film layer is located between the back film and the support plate.

24. The display module according to claim 1, wherein, There is an optical adhesive layer between the flexible display cover plate and the flexible light-emitting layer.

25. An electronic device, wherein, It includes at least the display module according to any one of claims 1-24 above.

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