Flexible screen cover plate, flexible screen and foldable electronic equipment

Abstract

The embodiment of the invention discloses a flexible screen cover plate, a flexible screen and foldable electronic equipment, relates to the field of ultra-thin glass, and solves the problem that an existing protective film layer is poor in improvement effect on the impact resistance of the ultra-thin glass. The flexible screen cover plate comprises ultra-thin glass, a first buffer coating and a second buffer coating. The ultra-thin glass is provided with a first surface and a second surface which are oppositely arranged. The first buffer coating is disposed on the first surface, and the second buffer coating is disposed on the second surface. The first buffer coating and the second buffer coating can form physical protection on the first surface and the second surface of the ultra-thin glass, so that the impact resistance of the ultra-thin glass is improved.

Description

Technical Field

[0001] The present application relates to the field of ultra-thin glass technology, and in particular to a flexible screen cover, a flexible screen and a foldable electronic device. Background Art

[0002] With the development of display technology, the display screens of mobile terminals have evolved from straight screens to flexible screens, among which ultra-thin glass (UTG) as a protective cover is one of the important components of flexible screens.

[0003] Ultra-thin glass has the disadvantages of being thin, fragile, easy to hurt people, low strength, and poor impact resistance. It cannot be directly used as a protective cover, and usually requires a protective film layer to be set on the ultra-thin glass. However, the existing protective film layer structure on ultra-thin glass has a poor effect on improving the impact resistance of ultra-thin glass. Summary of the invention

[0004] The embodiments of the present application provide a flexible screen cover, a flexible screen and a foldable electronic device, which solve the problem that the existing protective film layer has a poor effect on improving the impact resistance of ultra-thin glass.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a flexible screen cover. The flexible screen cover comprises ultra-thin glass, a first buffer coating and a second buffer coating. The ultra-thin glass has a first surface and a second surface arranged opposite to each other. The first buffer coating is arranged on the first surface, and the second buffer coating is arranged on the second surface. Therefore, the first buffer coating and the second buffer coating can form physical protection for both the first surface and the second surface of the ultra-thin glass. Compared with a flexible screen cover having only a single buffer layer, the flexible screen cover of the embodiment of the present application has stronger impact resistance.

[0007] Based on the structure of the flexible screen cover, in some embodiments of the present application, the material of the first buffer coating includes any one or more of acrylate resin, silicone resin, epoxy resin, and polyurethane resin. These materials have the advantages of good light transmittance and excellent elastic deformation performance, and can improve the warpage of the overall structure of the flexible screen cover by utilizing their own volume shrinkage while improving the impact resistance.

[0008] Furthermore, in some embodiments of the present application, the thickness of the first buffer coating is in the range of 5-30 μm. The first buffer coating can reduce the influence on the thickness of the flexible screen cover plate while having good impact resistance.

[0009] In addition, in some embodiments of the present application, the material of the second buffer coating includes any one or more of acrylate modified polyurethane, epoxy modified polyurethane, hyperbranched polyurethane, acrylic resin, silicone resin, and epoxy resin. These materials also have the advantages of good light transmittance, excellent elastic deformation performance, and good impact resistance. In addition, the elastic modulus of the second buffer coating is 10Mpa-5Gpa, which can ensure that the second buffer coating has good impact resistance.

[0010] Furthermore, in some embodiments of the present application, the second buffer coating includes a plurality of sub-buffer coatings, and the plurality of sub-buffer coatings are stacked. At least two of the plurality of sub-buffer coatings are made of different materials. Thus, the impact resistance requirements of various flexible screen cover plates can be met.

[0011] In addition, in some embodiments, the thickness of the second buffer coating is in the range of 5-100 μm. The second buffer coating can reduce the impact on the thickness of the flexible screen cover plate while having good impact resistance, which is conducive to the thinness of the flexible screen.

[0012] Furthermore, in some embodiments of the present application, the flexible screen cover further includes an adhesive layer, and the adhesive layer is located between the second buffer coating and the second surface. The second buffer coating is disposed on the second surface through the adhesive layer. The adhesive layer can improve the adhesion between the second buffer coating and the second surface of the ultra-thin glass, and improve the bending durability of the flexible screen cover.

[0013] In some embodiments of the present application, the material of the adhesive layer includes any one or more of a photocurable acrylic oligomer resin, an amino silane coupling agent, and a mercapto silane coupling agent. These materials have good light transmittance, adhesion, and can dry quickly.

[0014] Furthermore, in some embodiments of the present application, the thickness of the adhesive layer is in the range of 0.1-10 μm. The adhesive layer has sufficient thickness to reduce the impact on the thickness of the flexible screen cover while ensuring the bonding performance, which is conducive to the thinning of the flexible screen.

[0015] In order to further improve the hardness of the flexible screen cover, in some embodiments of the present application, the flexible screen cover further includes a hardening coating, which is disposed on a surface of the second buffer coating away from the adhesive layer. The hardening coating can increase the surface hardness of the flexible screen cover.

[0016] In some embodiments of the present application, the material of the hardened coating includes any one or more of multifunctional acrylic resin, epoxy-modified acrylic resin, polyurethane-modified acrylic resin, fluoropolyether-modified acrylic resin, polysiloxane, and epoxy resin. These materials have the advantages of high hardness, good adhesion, good water resistance, and excellent chemical resistance, and can also provide glass texture. In addition, the elastic modulus of the hardened coating is 1-10Gpa to ensure that the hardened coating has sufficient elastic modulus and can also produce corresponding deformation when the flexible screen is folded.

[0017] Furthermore, in some embodiments of the present application, the thickness of the hardened coating is in the range of 3-10 μm. The hardened coating has sufficient thickness, which reduces the impact on the thickness of the flexible screen cover while ensuring sufficient hardness of the flexible screen cover.

[0018] In addition, in some embodiments of the present application, the flexible screen cover further includes an anti-fingerprint coating, which is disposed on a surface of the hardened coating away from the second buffer coating. The anti-fingerprint coating can make the flexible screen cover have a smooth surface and anti-fingerprint properties.

[0019] Furthermore, in some embodiments, the anti-fingerprint coating includes any one or more of active silane group materials, perfluoropolyether, polytetrafluoroethylene, and polyvinylidene fluoride. These materials have good hydrophobicity and oleophobicity, so that the flexible screen cover has the functions of waterproof, oil-proof, anti-fouling, and anti-fingerprint adhesion.

[0020] In the second aspect, the embodiment of the present application provides a flexible screen, which includes the flexible screen cover plate and the flexible display panel described in the above embodiment. The flexible display panel is laminated with the first buffer coating in the flexible screen cover plate. Since the flexible screen cover plate in the flexible screen of the embodiment of the present application has the same structure as the flexible screen cover plate described in the above embodiment, the two can solve the same technical problems and obtain the same technical effects, which will not be described in detail here.

[0021] In the third aspect, the embodiment of the present application provides a foldable electronic device, including a housing and the flexible screen described in the above embodiment. The flexible screen is arranged on the housing. Since the flexible screen in the foldable electronic device of the embodiment of the present application has the same structure as the flexible screen described in the above embodiment, both can solve the same technical problems and obtain the same technical effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a foldable electronic device in an embodiment of the present application, which is a foldable mobile phone;

[0024] Figure 2 This is a structural schematic diagram of a foldable mobile phone in an unfolded posture according to an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the foldable mobile phone in a folded position according to an embodiment of the present application;

[0026] Figure 4 This is a cross-sectional schematic diagram of a flexible screen in a foldable mobile phone according to an embodiment of the present application;

[0027] Figure 5 This is a cross-sectional schematic diagram of a flexible screen cover in a foldable mobile phone according to an embodiment of the present application;

[0028] Figure 6 This is a cross-sectional schematic diagram of a flexible screen cover with two layers of sub-buffer coating in a foldable mobile phone according to an embodiment of the present application;

[0029] Figure 7 This is a cross-sectional schematic diagram of a flexible screen cover with an adhesive layer in a foldable mobile phone according to an embodiment of the present application;

[0030] Figure 8 This is a cross-sectional schematic diagram of a flexible screen cover with a hardened coating in a foldable mobile phone according to an embodiment of the present application;

[0031] Fig. 9 This is a cross-sectional schematic diagram of a flexible screen cover with an anti-fingerprint coating in a foldable mobile phone according to an embodiment of the present application.

[0032] Figure Number:

[0033] 1000-foldable mobile phone; 100-shell; 101-first shell; 102-second shell; 200-flexible screen; 10-flexible screen cover; 1-ultra-thin glass; 11-first surface; 12-second surface; 2-first buffer coating; 3-second buffer coating; 31-sub-buffer coating; 4-adhesive layer; 5-hardening coating; 6-anti-fingerprint coating; 20-flexible display panel; 300-hinge shaft. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0035] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0036] In addition, in the present application, directional terms such as "up", "down", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0037] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can refer to the connection of mechanical structure or physical structure. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be directly connected or indirectly connected through an intermediate medium. It can also be understood as the physical contact and electrical conduction of components, and it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as PCB copper foil or wires that can transmit electrical signals.

[0038] The embodiment of the present application includes a foldable electronic device, which includes a mobile phone, a computer, and other electronic devices that require a foldable screen. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned foldable electronic device. For the convenience of explanation, the following is taken as an example. Figure 1 The foldable mobile phone shown is used as an example for illustration.

[0039] Figure 1 The foldable electronic device of the embodiment of the present application is a three-dimensional diagram of a foldable mobile phone. Figure 1 The foldable mobile phone 1000 includes a housing 100 and a flexible screen 200. The housing 100 includes a first housing 101 and a second housing 102, and the first housing 101 is movably connected to the second housing 200. For example, the foldable mobile phone 1000 also includes Figure 2 The hinge shaft 300 shown in the figure can rotatably connect the first housing 101 and the second housing 200. The foldable display screen 300 is mounted on the first housing 101 and the second housing 200. The flexible screen 200 has the following features: Figure 2 The unfolded posture shown and Figure 3 When the flexible screen 200 switches from the unfolded posture to the folded posture, as shown in FIG. Figure 2 In the direction of the arrow shown, the first housing 101 can be rotated toward the direction close to the second housing 200, or the second housing 200 can be rotated toward the direction close to the first housing 101, until the first housing 101 and the second housing 200 are arranged opposite to each other. Figure 3 As shown, the flexible screen 200 is in a folded posture. Alternatively, the foldable mobile phone 1000 may further include a translation mechanism, which movably connects the first housing 101 and the second housing 200.

[0040] Understandably, Figure 1 The foldable mobile phone 1000 shown is a foldable mobile phone, and the flexible screen 200 has only one fold line. The flexible screen 200 of the embodiment of the present application may also have two or more fold lines, and other folding forms may be realized, which is not limited by the present application. Accordingly, for mobile phones with other folding methods, the foldable mobile phone 1000 may have more than two shells, and the connection method between the two shells may also be changed according to the folding method.

[0041] The flexible screen 200 is one of the important components of the foldable mobile phone 1000. The flexible screen 200 of the embodiment of the present application includes: Figure 4 The flexible screen cover plate 10 and the flexible display panel 20 are shown. The flexible screen cover plate 10 is attached to the flexible display panel 20. When the foldable mobile phone 1000 is in the unfolded state, the flexible screen cover plate 10 is located on the side surface of the flexible display panel 20 facing outward (i.e., the side away from the housing 100). The flexible screen cover plate 10 is used to protect the flexible display panel 20. Figure 5 The flexible screen cover 10 includes ultra-thin glass 1, which has the advantages of good light transmittance, high hardness, high temperature resistance, scratch resistance and protection. It can form a certain physical protection effect on the flexible display panel 20 without affecting the display effect of the flexible display panel 20.

[0042] However, the ultra-thin glass 1 has the disadvantages of being thin, fragile, easy to hurt people, low strength, and poor impact resistance, and cannot be directly used as a protective cover. Figure 5 The flexible screen cover plate 10 of the embodiment of the present application further includes a first buffer coating 2 and a second buffer coating 3. The ultra-thin glass 1 has a first surface 11 and a second surface 12 arranged opposite to each other. For example, Figure 5 The first surface 11 shown in the figure is the surface of the ultra-thin glass 1 close to the flexible display panel 20, and the second surface 12 is the surface of the ultra-thin glass 1 away from the flexible display panel 20. The first buffer coating 2 can be coated on the first surface 11, and the second buffer coating 3 can be coated on the second surface 12. Therefore, compared with the flexible screen cover 10 having only a single buffer layer, the first buffer coating 2 and the second buffer coating 3 can form physical protection for both the first surface 11 and the second surface 12 of the ultra-thin glass 1, thereby improving the impact resistance of the ultra-thin glass 1.

[0043] Furthermore, the first buffer coating 2 and the second buffer coating 3 are made of transparent materials. Therefore, the first buffer coating 2 and the second buffer coating 3 are coated on the ultra-thin glass 1, which can ensure that the flexible screen cover 10 has good light transmittance.

[0044] In some embodiments of the present application, the material of the first buffer coating 2 includes any one or more of acrylate resin, silicone resin, epoxy resin, and polyurethane resin. These materials have the advantages of good light transmittance and excellent elastic deformation performance, and can improve the warpage of the overall structure by utilizing their own volume shrinkage on the basis of improving the impact resistance.

[0045] Furthermore, in some embodiments, the thickness range T1 of the first buffer coating 2 is 5-30 μm, which ensures that the first buffer coating 2 has sufficient thickness. The first buffer coating 2 can reduce the thickness impact on the flexible screen cover 10 while having good impact resistance.

[0046] In addition, in some embodiments of the present application, the material of the second buffer coating 3 includes any one or several of acrylate modified polyurethane, epoxy modified polyurethane, hyperbranched polyurethane, acrylic resin, silicone resin, and epoxy resin. These materials also have the advantages of good light transmittance, excellent elastic deformation performance, and good impact resistance. In addition, the elastic modulus of the second buffer coating 3 is 10Mpa-5Gpa, which can ensure that the second buffer coating 3 has good impact resistance.

[0047] Furthermore, in some embodiments of the present application, Figure 5 As shown, the second buffer coating is only one buffer coating. Alternatively, in other embodiments of the present application, refer to Figure 6 The second buffer coating includes a plurality of sub-buffer coatings 31, and the sub-buffer coatings 31 are stacked. At least two of the plurality of sub-buffer coatings 31 are made of different materials. Thus, the impact resistance requirements of various flexible screen cover plates 10 can be met. For example, Figure 6 The illustrated second buffer coating includes two sub-buffer coatings 31 , and the two sub-buffer coatings 31 are made of different materials.

[0048] In addition, in some embodiments of the present application, the thickness range T2 of the second buffer coating 3 is 5-100 μm, which ensures that the second buffer coating 3 has sufficient thickness. The second buffer coating 3 can reduce the thickness impact of the flexible screen cover 10 on the basis of having good impact resistance, which is conducive to the thinness of the flexible screen 100.

[0049] The above mainly describes the material and thickness of the first buffer coating 2 and the material and thickness of the second buffer coating 3. Based on the structure of the above-mentioned flexible screen cover plate 10, in some embodiments of the present application, the above-mentioned flexible screen cover plate 10 also includes the following Figure 7The adhesive layer 4 shown is located between the second buffer coating 3 and the second surface 12 of the ultra-thin glass 1. Thus, the second buffer coating 3 is disposed on the second surface 12 through the adhesive layer 4. The adhesive layer 4 can improve the adhesion between the second buffer coating 3 and the second surface 12, and improve the bending durability of the flexible screen cover 10.

[0050] Furthermore, in some embodiments of the present application, the material of the adhesive layer 4 includes any one or more of light-curable acrylic oligomer resin, amino silane coupling agent, and mercapto silane coupling agent. These materials have the advantages of good light transmittance and adhesion, and can be dried quickly.

[0051] In some embodiments, the thickness T3 of the adhesive layer 4 is in the range of 0.1-10 μm. The adhesive layer 4 has sufficient thickness to reduce the thickness impact on the flexible screen cover 10 while ensuring the bonding performance, which is conducive to the thinning of the flexible screen 100.

[0052] Furthermore, in order to further improve the hardness of the flexible screen cover plate 10, in some embodiments of the present application, the flexible screen cover plate 10 further includes: Figure 8 The hardening coating 5 shown is arranged on the surface of the second buffer coating 3 on one side away from the bonding layer 4. The hardening coating 5 can increase the surface hardness of the flexible screen cover 10.

[0053] Based on this, in some embodiments of the present application, the material of the hardened coating 5 includes any one or more of multifunctional acrylic resin, epoxy-modified acrylic resin, polyurethane-modified acrylic resin, fluoropolyether-modified acrylic resin, polysiloxane, and epoxy resin. These materials have the advantages of high hardness, good adhesion, good water resistance, and excellent chemical resistance, and can also provide glass texture. In addition, the elastic modulus of the hardened coating 5 is 1-10Gpa to ensure that the hardened coating 5 has sufficient elastic modulus to produce corresponding deformation when the flexible screen 100 is folded.

[0054] Based on this, in some embodiments of the present application, the thickness T4 of the hardened coating 5 is in the range of 3-10 μm. The hardened coating 5 has sufficient thickness, which reduces the impact on the thickness of the flexible screen cover 10 while ensuring sufficient hardness of the flexible screen cover 10, which is conducive to the thinning of the flexible screen 100.

[0055] In addition, in some embodiments of the present application, the flexible screen cover 10 further includes: Fig. 9 The anti-fingerprint coating 6 shown is arranged on the surface of the hardening coating 5 on one side away from the second buffer coating 3. The anti-fingerprint coating 6 can make the flexible screen cover 10 have a smooth surface and anti-fingerprint properties.

[0056] Furthermore, in some embodiments of the present application, the anti-fingerprint coating 6 includes any one or more of active silane group materials, perfluoropolyether, polytetrafluoroethylene, and polyvinylidene fluoride. These materials have good hydrophobicity and oleophobicity, so that the flexible screen cover 10 has the functions of waterproof, oil-proof, anti-fouling, and anti-fingerprint adhesion.

[0057] Each coating layer in the flexible screen cover plate 10 of the embodiment of the present application adopts the above thickness and material settings. Therefore, in some embodiments of the present application, the total thickness T of the flexible screen cover plate 10 ranges from 5 to 20 nm, and the water drop angle ranges from 100° to 110°.

[0058] Based on the structure of the above-mentioned flexible screen cover plate 10, the flexible screen cover plate 10 of the embodiment of the present application can be manufactured by the following manufacturing method. The manufacturing method includes:

[0059] S100: Provides ultra-thin glass1.

[0060] The ultra-thin glass 1 needs to be cleaned to ensure the cleanliness of the first surface 11 and the second surface 12 of the ultra-thin glass 1 .

[0061] S200: coating an adhesive layer 4 on the second surface 12 of the ultra-thin glass 1 , and curing the adhesive layer 4 .

[0062] The coating process of the adhesive layer 4 may be a wire bar coating process or a slit coating process, and the curing process of the adhesive layer 4 may be a thermal curing process.

[0063] S300: coating the second buffer coating 3 on the adhesive layer 4, and then curing the second buffer coating 3.

[0064] The coating process of the second buffer coating 3 may be a wire rod coating process or a slit coating process. The curing process of the second buffer coating 3 may include a thermal curing process and a UV (ultraviolet) curing process. The second buffer coating 3 is first cured by a thermal curing process and then cured by a UV curing process.

[0065] S400: coating the hardening coating 5 on the second buffer coating 3, and then curing the hardening coating 5.

[0066] The coating process of the hardening coating 5 may be a wire bar coating process or a slit coating process. The curing process of the hardening coating 5 may include a thermal curing process and a UV curing process. The hardening coating 5 is first cured by a thermal curing process and then cured by a UV curing process.

[0067] S500 : forming an anti-fingerprint coating layer 6 on the hardening coating layer 5 .

[0068] The anti-fingerprint coating 6 may be made by a vapor deposition process, that is, the anti-fingerprint coating 6 is made by a vapor deposition process on the hardening coating 5, and the anti-fingerprint coating 6 is solidified after being cooled.

[0069] S600: coating a first buffer coating 2 on the first surface 11 of the ultra-thin glass 1 , and then curing the first buffer coating 2 .

[0070] The coating process of the first buffer coating 2 may be a wire rod coating process or a slit coating process. The curing process of the first buffer coating 2 may include a thermal curing process and a UV curing process. The first buffer coating 2 is first cured by a thermal curing process and then cured by a UV curing process.

[0071] The above is a description of the structural composition, coating materials and parameters, and manufacturing process of the flexible screen cover 10 of the embodiment of the present application. The flexible screen cover 10 of the embodiment of the present application is further described below in conjunction with several specific embodiments.

[0072] Example 1

[0073] The flexible screen cover 10 in this example includes ultra-thin glass 1, a first buffer coating 2, an adhesive layer 4, a second buffer coating 3, a hardening coating 5 and an anti-fingerprint coating 6. The ultra-thin glass 1 has a first surface 11 and a second surface 12 arranged opposite to each other. The first buffer coating 2 is arranged on the first surface 11. The adhesive layer 4, the second buffer coating 3, the hardening coating 5 and the anti-fingerprint coating 6 are sequentially stacked on the second surface 12. The following Table 1 illustrates the various parameters of the flexible screen cover 10 in this example, such as the material, thickness parameters and manufacturing process of each coating. " / " in the table means none or omitted. Among them, omission refers to the prior art, which is not involved in this patent and will not be described in detail here. In addition, " / " in other tables below also means the same meaning.

[0074] Table 1 Parameters of flexible screen cover

[0075] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0076] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 2 below.

[0077] Table 2 Test results of flexible screen cover

[0078]

[0079] It can be seen from the data in Table 2 that compared with the flexible screen cover plate 10 having only the second buffer coating 3, the first buffer coating 2 in the flexible screen cover plate 10 of this example can be used as a hard substrate, and the ultra-thin glass 1 has a double-sided buffer coating, which improves the impact resistance of the flexible screen cover plate 10, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance.

[0080] Example 2

[0081] The coating composition of the flexible screen cover plate 10 of this example is the same as that of the coating composition of Example 1, except that some parameters are different. Table 3 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0082] Table 3 Parameters of flexible screen cover

[0083] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Mercapto silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0084] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 4 below.

[0085] Table 4 Test results of flexible screen cover

[0086]

[0087]

[0088] From the data in Table 4, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. Moreover, compared with Example 1, the adhesive layer 4 in this example is replaced with a mercapto-type silane coupling agent, and the hundred-grid test result of the coating in the flexible screen cover plate 10 is improved from 4B to 5B. The second buffer coating 3, the hardening coating 5, and the anti-fingerprint coating 6 have stronger adhesion.

[0089] Example 3

[0090] The coating composition of the flexible screen cover plate 10 of this example is the same as that of the coating composition of Example 1, except that some parameters are different. Table 5 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0091] Table 5 Parameters of flexible screen cover

[0092] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Dodecafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0093] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 6 below.

[0094] Table 6 Test results of flexible screen cover

[0095]

[0096] From the data in Table 6, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. Moreover, compared with Example 1, the hardening coating 5 in this example is replaced with dodecafunctional acrylate, which improves the hardness of the hardening coating 5, so that the hardness of the flexible screen cover plate 10 is increased from 2H to 3H.

[0097] Example 4

[0098] The coating composition of the flexible screen cover plate 10 of this example is the same as that of the coating composition of Example 1, except that some parameters are different. Table 7 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0099] Table 7 Parameters of flexible screen cover

[0100]

[0101]

[0102] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 8 below.

[0103] Table 8 Test results of flexible screen cover

[0104]

[0105] From the data in Table 8, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. In addition, compared with Example 1, the coating process in this example is changed from wire rod coating to slit coating, which improves the coating accuracy and thickness uniformity, thereby improving the anti-warping performance of the flexible screen cover plate 10, so that the warping degree of the flexible screen cover plate 10 is increased from 0.8mm to 0.6mm.

[0106] Example 5

[0107] The coating composition of the flexible screen cover plate 10 of this example is the same as that of the coating composition of Example 1, except that some parameters are different. Table 9 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0108] Table 9 Parameters of flexible screen cover

[0109] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 50μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0110] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 10 below.

[0111] Table 10 Test results of flexible screen cover

[0112]

[0113]

[0114] From the data in Table 10, it can be seen that the flexible screen cover 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. Moreover, compared with Example 1, the thickness of the ultra-thin glass 1 in this example is replaced from 30μm to 50μm, which improves the impact strength and anti-warping performance of the flexible screen cover 10, and the pen drop performance is improved from 28cm to 35cm, and the warping degree is improved from 0.8mm to 0.2mm.

[0115] Example 6

[0116] The coating composition of the flexible screen cover plate 10 of this example is the same as that of the coating composition of Example 1, except that some parameters are different. Table 11 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0117] Table 11 Parameters of flexible screen cover

[0118] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 20nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0119] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 12 below.

[0120] Table 12 Test results of flexible screen cover

[0121]

[0122] From the data in Table 12, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. Moreover, compared with Example 1, the thickness of the anti-fingerprint coating 6 in this example is increased from 10 μm to 20 μm, which improves the smoothness and anti-fingerprint performance of the surface of the flexible screen cover plate 10, and the water drop angle is increased from 105° to more than 110°.

[0123] Example 7

[0124] The coating composition in the flexible screen cover plate 10 of this example is the same as that in Example 1, except that some parameters are different. Table 13 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0125] Table 13 Parameters of flexible screen cover

[0126] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Acrylate modified polyurethane 40μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0127] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 14 below.

[0128] Table 14 Test results of flexible screen cover

[0129]

[0130] From the data in Table 14, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. Moreover, compared with Example 1, the material of the second buffer coating 3 in this example is replaced from hyperbranched polyurethane to acrylate-modified polyurethane, which improves the impact strength of the flexible screen cover plate 10, and the pen drop performance is improved from 28cm to 30cm.

[0131] Example 8

[0132] The coating composition in the flexible screen cover plate 10 of this example is the same as that in Example 1, except that some parameters are different. Table 15 illustrates various parameters of the flexible screen cover plate 10 of this example, such as the material, thickness parameters and manufacturing process of each coating.

[0133] Table 15 Parameters of flexible screen cover

[0134] Structure Name Material thickness Coating process Curing process Anti-fingerprint coating Perfluoropolyether 10nm Evaporation / Hard coating Hexafunctional acrylate 8μm Wire rod coating Thermal and UV curing Second buffer coating Hyperbranched polyurethane 50μm Wire rod coating Thermal and UV curing Adhesive layer Amino silane coupling agent 5μm Wire rod coating Heat curing Ultra-thin glass Glass 30μm / / First buffer coating Acrylate 20μm Wire rod coating Thermal and UV curing

[0135] Various tests were performed on the flexible screen cover 10 in this example, and the results are shown in Table 16 below.

[0136] Table 16 Test results of flexible screen cover

[0137]

[0138] From the data in Table 16, it can be seen that the flexible screen cover plate 10 of this example has good impact resistance, and has the advantages of high hardness, good anti-warping performance, smooth surface, and good anti-fingerprint performance. In addition, compared with Example 1, the thickness of the second buffer coating 3 in this example is increased from 40 μm to 50 μm, which improves the impact strength of the flexible screen cover plate 10, and the pen drop performance is improved from 28 cm to 32 cm.

[0139] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A flexible screen cover, characterized in that: include: Ultra-thin glass, the ultra-thin glass having a first surface and a second surface arranged opposite to each other; a first buffer coating disposed on the first surface; A second buffer coating is disposed on the second surface.

2. The flexible screen cover according to claim 1, characterized in that: The flexible screen cover also includes: An adhesive layer is located between the second buffer coating and the second surface, and the second buffer coating is arranged on the second surface through the adhesive layer.

3. The flexible screen cover according to claim 1 or 2, characterized in that: The flexible screen cover also includes: A hardening coating is provided on a surface of the second buffer coating layer away from the bonding layer.

4. The flexible screen cover according to any one of claims 1 to 3, characterized in that: The flexible screen cover also includes: An anti-fingerprint coating is disposed on a surface of the hardening coating that is away from the second buffer coating.

5. The flexible screen cover according to any one of claims 1 to 4, characterized in that: The material of the first buffer coating layer includes any one or more of acrylate resin, silicone resin, epoxy resin, and polyurethane resin.

6. The flexible screen cover according to any one of claims 1 to 5, characterized in that: The thickness of the first buffer coating ranges from 5 to 30 μm.

7. The flexible screen cover according to any one of claims 2 to 6, characterized in that: The material of the second buffer coating layer includes any one or any combination of acrylate-modified polyurethane, epoxy-modified polyurethane, hyperbranched polyurethane, acrylic resin, silicone resin, and epoxy resin.

8. The flexible screen cover according to any one of claims 2 to 7, characterized in that: The second buffer coating includes a plurality of sub-buffer coatings, and the sub-buffer coatings are stacked; at least two of the plurality of sub-buffer coatings are made of different materials.

9. The flexible screen cover according to any one of claims 2 to 8, characterized in that: The thickness of the second buffer coating ranges from 5 to 100 μm.

10. The flexible screen cover according to any one of claims 3 to 9, characterized in that: The material of the adhesive layer includes any one or any combination of photocurable acrylic oligomer resin, amino silane coupling agent, and mercapto silane coupling agent.

11. The flexible screen cover according to any one of claims 3 to 10, characterized in that: The thickness of the adhesive layer ranges from 0.1 to 10 μm.

12. The flexible screen cover according to any one of claims 4 to 11, characterized in that: The material of the hardened coating layer includes any one or more of multifunctional acrylic resin, epoxy-modified acrylic resin, polyurethane-modified acrylic resin, fluoropolyether-modified acrylic resin, polysiloxane, and epoxy resin.

13. The flexible screen cover according to any one of claims 4 to 12, characterized in that: The thickness of the hardened coating layer ranges from 3 to 10 μm.

14. The flexible screen cover according to any one of claims 4 to 13, characterized in that: The material of the anti-fingerprint coating includes any one or any combination of active silane group materials, perfluoropolyether, polytetrafluoroethylene, and polyvinylidene fluoride.

15. A flexible screen, characterized in that: include: The flexible screen cover according to any one of claims 1 to 14; A flexible display panel is laminated with the first buffer coating in the flexible screen cover.

16. A foldable electronic device, characterized in that: It comprises a shell and the flexible screen as described in claim 15, wherein the flexible screen is arranged on the shell.

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