WO2021000605A1 - 柔性显示盖板、柔性显示模组和柔性显示装置 - Google Patents

柔性显示盖板、柔性显示模组和柔性显示装置 Download PDF

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Publication number
WO2021000605A1
WO2021000605A1 PCT/CN2020/080073 CN2020080073W WO2021000605A1 WO 2021000605 A1 WO2021000605 A1 WO 2021000605A1 CN 2020080073 W CN2020080073 W CN 2020080073W WO 2021000605 A1 WO2021000605 A1 WO 2021000605A1
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WO
WIPO (PCT)
Prior art keywords
layer
flexible display
flexible
glass
display cover
Prior art date
Application number
PCT/CN2020/080073
Other languages
English (en)
French (fr)
Inventor
欧阳辰鑫
唐中帜
吕旺春
赵静
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202090000691.4U priority Critical patent/CN217955362U/zh
Priority to KR1020227002316A priority patent/KR102694472B1/ko
Priority to JP2021578023A priority patent/JP7323654B2/ja
Priority to EP20834776.5A priority patent/EP3979228A4/en
Publication of WO2021000605A1 publication Critical patent/WO2021000605A1/zh
Priority to US17/567,576 priority patent/US12064939B2/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/325—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polycycloolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1641—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being formed by a plurality of foldable display components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B2307/00—Properties of the layers or laminate
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    • B32B2307/536—Hardness
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    • B32B2571/00—Protective equipment

Definitions

  • This application relates to the field of terminal technology, and in particular to a flexible display cover, a flexible display module, and a flexible display device.
  • the foldable mobile phone is only the size of a traditional mobile phone (5-6 inches) after being folded, which is convenient to carry around, but when opened, it can have the display size of a tablet (7-8 inches). Once the foldable mobile phone was released, it has received widespread attention, and major mobile phone manufacturers are also intensively optimizing and improving the design plan to promote the mass production of foldable mobile phones.
  • flexible OLED screens also have great application prospects in other flexible electronic devices such as flexible wearable devices and foldable computers.
  • the millimeter-thick glass cover for straight mobile phones cannot be bent along with the flexible OLED screen, so it cannot be directly used as a display cover for foldable mobile phone screens.
  • transparent polymer film is mainly used as the cover to protect the display screen of the display module, such as polyethylene terephthalate (PET) or polyimide (PI) plastic film. Both PET and PI have very good flexibility, and the bending limit can reach R1.
  • PET and PI have very good flexibility, and the bending limit can reach R1.
  • the polymer transparent film material does not have some of the excellent properties of the traditional glass cover.
  • the surface hardness of the polymer film is much lower than that of the glass. The only way to improve the scratch resistance and abrasion resistance of the cover plate is by coating the outer layer with a transparent hard coat.
  • the modulus of the polymer cover plate is low, which cannot provide strong protection for the display module.
  • the polymer cover plate will occur after a long period of static bending or multiple dynamic bending. Creep, it is difficult to completely restore the original state.
  • polymer materials are prone to aging and fatigue, and there will be a certain crease and a certain probability of fatigue fracture after multiple bending.
  • Ultra-thin glass is a potential cover material that not only has good bending properties, but also retains to a certain extent the excellent properties of glass such as high modulus, high hardness, high strength and high transmittance.
  • the thickness of ultra-thin glass can be 0.03mm ⁇ 0.15mm, the bending limit can reach R2, and there is no obvious creep phenomenon at room temperature.
  • UTG Ultra-thin glass
  • the main problem is the decrease in reliability caused by the decrease of UTG thickness, which is prone to brittle fracture during collision and cracks after scratching. Therefore, it is necessary to protect the surface of UTG to improve its scratch resistance, impact resistance and chipping resistance.
  • This application provides a flexible display cover, a flexible display module, and a flexible display device containing ultra-thin glass, so as to solve or improve the flexible display cover composed of a polymer film that is prone to arching, creases, and creases during use. It is easy to fatigue and break, and rainbow lines appear. At the same time, it improves the scratch resistance, impact resistance and chipping resistance of the flexible display cover.
  • the present application provides a flexible display cover, which is used to cover a flexible screen in a flexible display module.
  • the flexible display module is applied to a flexible display device and has flexibility.
  • the above-mentioned flexible display cover includes at least two stacked structures, namely a glass layer and a hardened layer.
  • the glass layer is connected to the flexible display screen by optically clear adhesive (OCA) and optically clear resin (OCR), etc.
  • OCA optically clear adhesive
  • OCR optically clear resin
  • the hardened layer has good hardness and strength, can protect the glass layer, and reduce the flexible display cover from being scratched, broken, broken by impact, and splashed by glass fragments after being broken, which is beneficial to improve the user experience. Since the glass layer has good linear elasticity and hardly undergoes plastic deformation before brittle fracture, the flexible display cover can be restored to its original state even after a period of high temperature static bending. And the glass layer has high modulus (strengthened glass modulus can exceed 70GPa), high hardness, can stabilize the polymer layer in the display module, reduce arching, improve flatness, and improve the overall display effect.
  • the thickness of the glass layer may satisfy M 1 : 50 ⁇ m ⁇ M 1 ⁇ 150 ⁇ m, and the composition may be soda lime glass, aluminum silicate glass, soda alumina silicate glass, lithium aluminum silicate glass, phosphoaluminosilicate glass Or any of the glass ceramics.
  • the chemical strengthening treatment can form a compressive stress layer in the thickness range of 10-20 ⁇ m on the glass surface to ensure that the stretched surface of the glass will not develop surface microcracks due to excessive tensile stress when the glass is bent to a large angle.
  • the presence of the surface compressive stress layer also improves the drop resistance and impact resistance of the glass layer and the entire cover, effectively protecting the inner flexible display screen and other structures.
  • the thickness of the hardened layer M 2 satisfy: 5 ⁇ m ⁇ M 1 ⁇ 50 ⁇ m, including UV resin material, urethane resin, acrylic resin, epoxy resin, amino resin, alkyd resin, silicone resin , Siloxane, silica, alumina, zirconia, graphene or diamond, or a combination of at least two.
  • the hardened layer needs to have good bending properties and light transmittance to ensure that the bending performance and optical properties of the ultra-thin glass are not significantly deteriorated after the hardened layer is covered.
  • the silicon-based material can be used as the hardened layer or the transition layer between the glass and the hardened layer. Better guarantee that the adhesion force exceeds 3B in the 100 grid test. Thirdly, the hardened layer should protect the glass, especially the glass surface: the pencil hardness of the hardened layer should exceed 2H, and the impact resistance of the glass after covering the hardened layer should also be improved.
  • the flexible protective layer there is a flexible protective layer around the glass layer.
  • the flexible protective layer can reduce the risk of crack propagation or even the entire glass layer fragmentation caused by the side stress concentration of the glass layer, and improve the yield rate of the flexible display cover assembly process and the service life of the whole machine.
  • the material of the flexible protective layer includes one or a combination of at least two of silica gel, polyurethane elastomer, thermoplastic elastomer, thermoplastic polyester elastomer, thermoplastic dynamic vulcanizate, and EPDM rubber.
  • the flexible display cover may further include an explosion-proof layer, and the explosion-proof layer is disposed on a side of the glass layer away from the hardened layer.
  • the explosion-proof layer has explosion-proof and impact resistance, and even if the glass layer is broken, there will be no fragmentation problem, thereby improving the reliability and safety of the flexible display cover.
  • the explosion-proof layer can be reliably fixed under the glass layer through the adhesive layer.
  • the material of the adhesive layer can be selected according to requirements, and it is specifically required to make the adhesive layer have good adhesion, flexibility and light permeability. Specifically, it may be an optically transparent adhesive layer or a photosensitive adhesive layer.
  • the thickness M 4 of the adhesive layer may satisfy: 5 ⁇ m ⁇ M 4 ⁇ 100 ⁇ m. The adhesive layer with this thickness has sufficient viscosity and can reduce the impact on the flexible display module.
  • the material of the explosion-proof layer can be a transparent polymer flexible layer or a shear thickening material layer, and the explosion-proof layers of both materials have good explosion-proof effects.
  • the thickness M 5 of the transparent polymer flexible layer may satisfy: 5 ⁇ m ⁇ M 5 ⁇ 100 ⁇ m.
  • the transparent polymer flexible layer with this thickness has better explosion-proof effect and better flexibility.
  • the material can include polyimide, polyethylene terephthalate, polyethylene naphthalate, polycarbonate or polymethyl methacrylate PMMA Any one or a copolymer of at least two or a combination of at least two. From the overall consideration of the display module and the design of the whole machine, the user chooses the thickness and material of the transparent polymer flexible layer according to the requirements, which can make the explosion-proof layer have a better explosion-proof effect.
  • the explosion-proof layer can be a transparent polymer flexible layer or a shear thickening material layer.
  • the shear thickening material layer has a thickness satisfying M 6: 50 ⁇ m ⁇ M 6 ⁇ 200 ⁇ m.
  • the shear thickening material layer with this thickness can have sufficient explosion-proof effect, and has good flexibility and light permeability.
  • the material of the shear thickening material layer may include an elastomer composite material based on hydroxyl-terminated polysiloxane, polyurethane, or styrene block polymer, or a shear thickening fluid fiber Composite materials.
  • the present application provides a flexible display module, the flexible display module includes at least a flexible screen and a flexible display cover in any of the above technical solutions, the flexible display cover and the flexible screen overlap .
  • the cover of the flexible display device includes a laminated glass layer and a hardened layer.
  • the hardened layer has good hardness and strength, can protect the glass layer, and reduce the situation that the flexible display cover is scratched or easily broken by pressure, which is beneficial to Improve user experience. Since the glass layer has good linear elasticity and hardly undergoes plastic deformation before brittle fracture, the flexible display cover can be restored to its original state even after a period of high temperature static bending.
  • the glass layer has high modulus (strengthened glass modulus can exceed 70GPa), high hardness, good protection for the display panel, and can also stabilize the polymer layer in the display module, reduce arching, improve flatness, and improve the overall display effect.
  • the present application provides a flexible display device.
  • the flexible display device includes a housing and a flexible display module installed in the housing.
  • the flexible display module is the flexible display module in the above technical solution.
  • the flexible display cover of the flexible display device includes a laminated glass layer and a hardened layer.
  • the hardened layer has good hardness and strength and can protect the glass layer. Reduce the situation that the flexible display cover is scratched or easily broken under pressure, which is beneficial to improve the user experience. Since the glass layer has good linear elasticity and hardly undergoes plastic deformation before brittle fracture, the flexible display cover can be restored to its original state even after a period of high temperature static bending.
  • the glass layer has high modulus (strengthened glass modulus can exceed 70 GPa), high hardness, and good protection for the display panel.
  • the glass layer has high flatness, anti-buckling and anti-crease, which can improve the appearance and texture of the flexible display module.
  • FIG. 1 is a schematic structural diagram of a flexible display device in an unfolded state provided by an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a folded state of a flexible display device provided by an embodiment of the application
  • FIG. 3 is a schematic diagram of another structure of a flexible display device provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a structure of a flexible screen provided by an embodiment of the application.
  • FIG. 5 is a schematic diagram of another structure of a flexible screen provided by an embodiment of the application.
  • FIG. 6 is a schematic cross-sectional structure diagram of a flexible display device provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of a cross-sectional structure of a flexible display module provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of another cross-sectional structure of a flexible display module provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of a top view structure of a flexible display module provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of another cross-sectional structure of a flexible display module provided by an embodiment of the application.
  • FIG. 11 is a schematic diagram of another cross-sectional structure of a flexible display module provided by an embodiment of the application.
  • FIG. 12 is a schematic diagram of the microstructure of a material with a shear thickening effect provided by an embodiment of the application.
  • FIG. 13 is a schematic diagram of another cross-sectional structure of a flexible display module provided by an embodiment of the application.
  • 22-flexible display cover 221-glass layer;
  • references described in this specification to "one embodiment” or “some embodiments”, etc. mean that one or more embodiments of the present application include a specific feature, structure, or characteristic described in combination with the embodiment. Therefore, the phrases “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in some other embodiments”, etc. appearing in different places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless it is specifically emphasized otherwise.
  • the terms “including”, “including”, “having” and their variations all mean “including but not limited to” unless otherwise specifically emphasized.
  • FIG. 1 shows the shape of a flexible display device when it is unfolded
  • FIG. 2 shows the shape of the flexible display device shown in FIG. 1 after being folded.
  • the flexible display device includes a housing 10 and a flexible display module 20.
  • the housing 10 has a folding part 11 that can be folded.
  • the flexible display module 20 can be folded as the folding part 11 is folded.
  • FIG. 3 shows a schematic structural diagram of another flexible display device. This embodiment provides After the flexible display device is folded, the housing 10 is exposed, and the flexible display module 20 is located inside the housing 10. It can be seen from the above description that the flexible display module 20 can be bent following the folding of the folding portion 11 in the flexible display device, and unfolded following the unfolding of the flexible display device. It should be understood that the foregoing are only a few specific embodiments, and the flexible display device involved in the present application may include any flexible display device whose flexible display module can be folded, bent, or rolled.
  • the aforementioned flexible display module may include a flexible screen, a touch layer and a flexible display cover.
  • the flexible screen may adopt an integrated flexible display screen, as shown in FIG. 4, which shows a schematic structural diagram of a flexible screen.
  • the flexible screen 21 may also adopt two rigid screen parts 211 and two A spliced display screen composed of a flexible screen portion 212 between the rigid screen portions 211; as shown in FIG. 5, FIG. 5 shows a schematic structural diagram of another flexible screen.
  • the flexible screen 21 can also adopt at least three rigid screens. When the portion 211 and at least two flexible screen portions 212 are implemented, one flexible screen portion 212 is spliced between any two adjacent rigid screen portions 211.
  • the touch layer may also adopt a flexible and foldable structure. The specific structure and structure of the flexible display module 20 will be described in detail below.
  • FIG. 6, shows a schematic cross-sectional structure diagram of a flexible display device 20 in an embodiment of the present application.
  • the flexible display module 20 provided by the embodiment of the present application may include a flexible screen 21 and a flexible display cover 22.
  • the cover 22 is used to cover the flexible screen 21 as a protective layer of the flexible display module 20.
  • FIG. 7, shows another schematic cross-sectional structure diagram of the flexible display module 20 provided by an embodiment of the present application.
  • the flexible display cover 22 may include a two-layer structure, respectively, a glass layer 221 and a hardened layer 222.
  • the glass layer 221 may be an ultra-thin flexible glass layer.
  • the glass layer 221 itself is flexible and can be bent.
  • the above-mentioned hardened layer 222 overlaps the glass layer 221 and is located on the side of the glass layer 221 away from the flexible screen 21, that is, the hardened layer 222 is located on the outer surface of the glass layer 221, that is, when the user uses the flexible display module 20, The surface of the glass layer 221 facing the user direction.
  • the hardened layer 222 has good hardness and strength, can protect the glass layer 221, reduce the situation that the flexible display cover 22 is scratched or easily broken under pressure, which is beneficial to improve the user experience. Since the glass layer 221 has good linear elasticity and hardly undergoes plastic deformation before brittle fracture, the flexible display cover can be restored to its original state even after a period of high temperature static bending.
  • the glass layer 221 has a high modulus (strengthened glass modulus can exceed 70 GPa), high hardness, and good protection for the display panel.
  • the glass layer has high flatness, anti-buckling and anti-crease, which can improve the appearance and texture of the flexible display module.
  • the thickness of the above-mentioned glass layer 221 needs to make the glass layer have sufficient flexibility and also need to have sufficient strength.
  • Embodiments of the present application herein is calculated according to experience a large amount of data analysis and simulation, a glass layer is that the thickness of the M 1 satisfy: 50 ⁇ m ⁇ M 1 ⁇ 150 ⁇ m.
  • Chemically strengthening method can be selected, typically selected LAS glass (including aluminosilicate glass, soda aluminosilicate glass, lithium aluminosilicate glass or aluminosilicate glass phosphorus and the like) and the like relatively easily mechanical strengthened glass, for example, the Na 2 O- Al 2 O 3 -SiO 2 series glass is put into molten potassium nitrate, in the temperature range below the glass transition point, the ionic radius/volume larger potassium ion (K + ) in the molten salt replaces the ionic radius/ Smaller sodium ions (Na + ), and form a pressure layer on the glass surface.
  • LAS glass including aluminosilicate glass, soda aluminosilicate glass, lithium aluminosilicate glass or aluminosilicate glass phosphorus and the like
  • relatively easily mechanical strengthened glass for example, the Na 2 O- Al 2 O 3 -SiO 2 series glass is put into molten potassium nitrate, in the temperature
  • the above-mentioned compressive stress layer formed on the surface of the glass can inhibit the growth of surface micro-cracks to a certain extent, ensure that the glass does not break during the bending process, and can improve the strength of the glass and protect the flexible screen.
  • the glass can also be soda-lime glass or glass-ceramic. Specifically, the ratio of chemical components in the glass can be selected according to requirements.
  • the hardened layer 222 can be directly produced on the surface of the glass layer 221 through a process of roll coating, brush coating, spray coating, curtain coating, dip coating, vapor deposition, sputtering plating or ion plating.
  • the hardening layer 222 can be an organic material, or an inorganic material, specifically UV resin, polyurethane resin, acrylic resin, epoxy resin, amino resin, alkyd resin, silicone resin, siloxane, silicon dioxide, One or a combination of at least two of alumina, zirconia, graphene or diamond.
  • the organic material selected for the hardened layer can generally be directly coated on the glass substrate by the low-temperature process such as roller coating, brush coating, spray coating, curtain coating or dip coating, and cured by air drying, thermal curing, and UV (ultraviolet) curing.
  • the inorganic materials selected to make the hardened layer such as zirconia and alumina, usually need to be filmed on the glass surface by vacuum evaporation, sputtering or ion plating, or used as fillers and pigments to mix with the organic coating Afterwards, it is coated on the glass surface by the process of roll coating, brush coating, spray coating, curtain coating or dip coating.
  • the hardened layer 222 may be a single material or a composite material.
  • the hardened layer 222 may be composed of epoxy resin and aluminum oxide, and the combination process is not limited.
  • the above two materials are added in the required proportion when preparing the hardened layer solution to form a hardened layer composed of two materials.
  • the material of the hardened layer 222 has higher hardness, better flexibility and higher light transmittance.
  • its thickness M 2 may satisfy: 5 ⁇ m ⁇ M 1 ⁇ 50 ⁇ m.
  • the thickness of the hardened layer may be 8 ⁇ m, 10 ⁇ m, 12 ⁇ m, 15 ⁇ m, 18 ⁇ m, 20 ⁇ m, 23 ⁇ m, 25 ⁇ m, 29 ⁇ m, 30 ⁇ m, 31 ⁇ m, 34 ⁇ m, 35 ⁇ m, 38 ⁇ m, 40 ⁇ m, 42 ⁇ m, 45 ⁇ m, or 47 ⁇ m.
  • the hardened layer 222 has sufficient flexibility when it has a sufficient protective effect on the glass layer 221.
  • the manufacturing process, material, and thickness can be designed and selected according to requirements, and the hardness of the hardened layer 222 can be at least 2H pencil hardness through reasonable design.
  • the flexible glass layer 221 can have a better protective effect.
  • the glass layer 221 is flexible, so the thickness is relatively thin and fragile, especially the edge area is easily damaged, even a few microns of defects will cause the glass layer 221 to break.
  • Figure 8 shows another schematic cross-sectional structure of the flexible display module provided by the embodiment of the present application
  • Figure 9 shows the schematic diagram of the flexible display module provided by the embodiment of the present application
  • the peripheral side of the glass layer 221 is further provided with a flexible protective layer 223.
  • the flexible protective layer 223 may completely cover the circumference of the glass layer 221, or it may only cover the glass layer 221 according to the actual product structure. Fragile areas.
  • the flexible protective layer 223 can absorb the pressure received, play the role of protecting the glass layer 221, and reduce the glass layer 221 from being broken due to the stress on the side. In the case of cracks, the service life of the flexible display cover 22 is increased.
  • the material of the flexible protective layer 223 can be silicone, polyurethane elastomer (PU), thermoplastic elastomer (TPE), thermoplastic polyester elastomer (TPEE), thermoplastic dynamic vulcanizate (TPV), Any one or a combination of at least two kinds of ethylene propylene diene rubber (EPDM).
  • the flexible protective layer 223 may be a single material or a composite material formed by combining at least two materials.
  • the silica gel and the thermoplastic polyester elastic material can be combined, and the combination process is not limited.
  • the above two materials can be added in proportion when preparing the flexible protective layer solution. It can be selected according to requirements.
  • the flexible protective layer 223 has certain elasticity, so that when it is subjected to external pressure, the flexible protective layer 223 can absorb the pressure and relieve the stress on the glass layer 221.
  • the flexible protective layer thickness can be 223 M 3 satisfy 10 ⁇ m ⁇ M 3 ⁇ 200 ⁇ m.
  • the flexible protective layer 223 of this thickness can have a better protective effect. Specifically, the greater the thickness of the flexible protective layer and the better the flexibility, the better the protective effect on the glass layer 221.
  • the thickness of the flexible protective layer 223 may be 20 ⁇ m, 30 ⁇ m, 50 ⁇ m, 80 ⁇ m, 100 ⁇ m, 120 ⁇ m, 130 ⁇ m, 150 ⁇ m, 170 ⁇ m, or 180 ⁇ m.
  • the size tolerance of the edge of the glass layer 221 should also be combined. If the size tolerance of the edge of the glass layer 221 is too large, it should be filled with a more flexible material to reduce the size of the edge of the glass layer 221. The squeezing force of the flexible layer.
  • FIG. 10 shows another schematic cross-sectional structure diagram of a flexible display module provided by an embodiment of the present application.
  • the glass layer 221 also has an explosion-proof layer 224 inside, that is, the explosion-proof layer 224 is located on the glass layer.
  • 221 is close to the side of the flexible screen 21, that is, the glass layer 221 is located between the hardened layer 222 and the explosion-proof layer 224.
  • the explosion-proof layer 224 has explosion-proof properties. In this way, even if the glass layer 221 is broken, there will be no splashing. Therefore, the reliability and safety of the flexible display cover 22 are improved. In addition, the impact resistance of the flexible display cover 22 can also be improved. Please refer to FIG.
  • the explosion-proof layer 224 may be bonded and fixed to the glass layer 221 through the adhesive layer 225, so that the explosion-proof layer 224 is more reliably fixed to the lower side of the glass layer 221.
  • the adhesive layer 225 may be an optically transparent adhesive layer, or may also be a photosensitive adhesive layer.
  • the adhesive layer 225 may have good adhesion to improve the reliability of the adhesion of the explosion-proof layer 224 and the glass layer 221, and the reliability of the work of the explosion-proof layer 224; the adhesive layer 225 may also have sufficient flexibility, In order to be bent with the flexible display module 20, in addition, the adhesive layer 225 can also have better light transmittance to reduce the influence on the display effect of the flexible display module 20.
  • the thickness of the adhesive layer needs to make the adhesive layer 225 sufficiently sticky; on the other hand, the thickness of the adhesive layer 225 should be as thin as possible to reduce the influence on the flexible display module.
  • the thickness M 4 of the adhesive layer may satisfy: 5 ⁇ m ⁇ M 4 ⁇ 100 ⁇ m.
  • the thickness of the adhesive layer 225 may be 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 25 ⁇ m, 30 ⁇ m, 35 ⁇ m, 40 ⁇ m, 45 ⁇ m, 50 ⁇ m, 55 ⁇ m, 60 ⁇ m, 65 ⁇ m, 70 ⁇ m, 75 ⁇ m, 80 ⁇ m, 85 ⁇ m, 90 ⁇ m, 95 ⁇ m, etc.
  • a suitable type of adhesive material and thickness can be selected according to the material characteristics of the adhesive layer 225 and the bonding strength requirements of the explosion-proof layer 224 and the glass layer 221.
  • the explosion-proof layer 224 may be a transparent polymer flexible layer, and the transparent polymer flexible layer has a certain explosion-proof type, specifically.
  • the transparent polymer flexible layer can be made of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), ring Any one of olefin copolymer (COC) or polymethyl methacrylate PMMA, or a combination of at least two of the above materials.
  • PI polyimide
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PC polycarbonate
  • COC olefin copolymer
  • PMMA polymethyl methacrylate
  • the explosion-proof layer 224 when the explosion-proof layer 224 is a transparent polymer flexible layer, its thickness M 5 can satisfy: 5 ⁇ m ⁇ M 5 ⁇ 100 ⁇ m, and its thickness can specifically be 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 25 ⁇ m, 30 ⁇ m, 35 ⁇ m, 40 ⁇ m, 45 ⁇ m, 50 ⁇ m, 55 ⁇ m, 60 ⁇ m, 65 ⁇ m, 70 ⁇ m, 75 ⁇ m, 80 ⁇ m, 85 ⁇ m, 90 ⁇ m or 95 ⁇ m etc.
  • the explosion-proof layer 224 with this thickness has better explosion-proof effect and better flexibility. The user can select an appropriate thickness of the explosion-proof layer 224 according to the explosion-proof requirements of the flexible display cover 22 and the material of the explosion-proof layer 224.
  • the explosion-proof layer 224 may be a layer of shear thickening material.
  • the shear thickening material usually refers to a non-Newtonian fluid whose viscosity increases with the increase of the shear rate. The apparent viscosity increases sharply upon impact, and this material can be used as a good protective material.
  • this kind of fluid is in a liquid state, has a short service life and is weak in anti-aging performance and secondary damage resistance, which limits its large-scale application.
  • materials with such a shear thickening effect that use polymers as a matrix and dispersed particles have gradually become the direction of development. Therefore, materials with a shear thickening effect are also called shear thickening materials.
  • FIG. 12 shows a schematic view of the microstructure of a material with a shear thickening effect in an embodiment of the present application.
  • Figure 12 shows a material with a shear thickening effect.
  • Dispersed particles 2242 are added to the matrix 2241. This material with a shear thickening effect is in a viscous flow state under a quasi-static load.
  • the dispersed particles 2242 added in the slab are in a uniformly dispersed state (as shown in part a in Fig. 12), while the dispersed particles 2242 absorb energy under the impact load F and are in an aggregated state (as shown in part b in Fig. 12).
  • the thickening effect material is in a solid state; therefore, when subjected to an impact load F, the material exhibits impact resistance, and the impact resistance increases with the increase of the impact speed.
  • the impact load F disappears, the dispersed particles 2242 in the matrix 2241 return to a uniformly dispersed state (as shown in part c in FIG. 12), which exhibits elasticity and realizes flexible bending. Therefore, by using the thickening material layer as the explosion-proof layer 224, the explosion-proof layer 224 can have better explosion-proof type and impact resistance.
  • the material of the shear thickening material layer may be an elastomer composite material based on hydroxyl-terminated polysiloxane (PDMS), polyurethane (PU) and styrene block polymer. Adding dispersed particles can obtain a material with better shear thickening effect; or, the material of the shear thickening material layer can also be a shear thickening fluid fiber composite material. Users can choose suitable materials as the shear thickening material layer according to their needs. When specifically setting the shear thickening material layer, the thickness M 6 of the shear thickening material layer may satisfy: 50 ⁇ m ⁇ M 6 ⁇ 200 ⁇ m.
  • the thickness can be 55 ⁇ m, 60 ⁇ m, 65 ⁇ m, 70 ⁇ m, 75 ⁇ m, 80 ⁇ m, 85 ⁇ m, 90 ⁇ m, 95 ⁇ m, 100 ⁇ m, 105 ⁇ m, 110 ⁇ m, 115 ⁇ m, 120 ⁇ m, 125 ⁇ m, 130 ⁇ m, 135 ⁇ m, 140 ⁇ m or 145 ⁇ m.
  • the thick material layer can have sufficient explosion-proof effect, and has good flexibility and light permeability.
  • the user can choose a suitable explosion-proof layer 224 according to the explosion-proof requirements of the flexible display cover 22 and the material of the shear thickening material layer. thickness of.
  • an embodiment of the present application provides a flexible display cover
  • the flexible display cover uses ultra-thin flexible glass with a thickness of 100 ⁇ m as the glass layer 221, and a layer is coated on the outer surface of the glass layer 221 through a curtain coating process
  • the 10 ⁇ m hardened layer 222 prevents scratches in daily use, and the surface pencil hardness of the hardened layer 222 is ⁇ 5H.
  • the edge of the ultra-thin flexible glass layer 221 is covered with a layer of 20 ⁇ m flexible silica gel as the flexible protective layer 223 through a roll coating process to prevent the edge of the flexible glass layer 221 from directly contacting hard objects such as structural parts and causing breakage.
  • the flexible display cover shown in FIG. 10 has the advantages of improving surface hardness and flatness, reducing the probability of glass edge fragmentation, preventing glass fragmentation and splashing, and improving impact resistance. It should be understood that this embodiment is only a specific implementation.
  • the flexible display cover can also use ultra-thin flexible glass with a thickness of 70 ⁇ m as the glass layer 221, and a layer of 20 ⁇ m hardening is applied to the outer surface of the glass layer 221 through a spraying process.
  • the layer 222 prevents scratches in daily use, and the surface pencil hardness of the hardened layer 222 is ⁇ 5H.
  • the edge of the ultra-thin flexible glass layer 221 is covered with a layer of 20 ⁇ m flexible silica gel as the flexible protective layer 223 through a roll coating process to prevent the edge of the flexible glass from directly contacting with hard objects such as structural parts and causing breakage.
  • the flexible display cover shown in FIG. 10 has the advantages of improving surface hardness and flatness, reducing the probability of glass edge chipping, preventing glass fragmentation and splashing, and impact resistance. It should be understood that this embodiment is only used as a specific implementation.
  • an embodiment of the present application also provides a foldable display module 20.
  • the flexible display module 20 may include a flexible screen 21 and the flexible display cover 22 described in any of the above embodiments.
  • the board 22 is used to cover the flexible screen 21 as a protective layer of the flexible display module 20.
  • the flexible display cover 22 includes at least two layers, namely a glass layer 221 and a hardened layer 222.
  • the glass layer 221 may be an ultra-thin flexible glass layer.
  • the glass layer 221 is flexible and can be bent. fold.
  • the above-mentioned hardened layer 222 overlaps the glass layer 221, and is located on the side of the glass layer 221 away from the flexible screen 21, that is, the hardened layer 222 is located on the outer surface of the glass layer 221. From another perspective, the outer surface is the user using the flexible display mold. In group 20, the glass layer 221 faces the surface of the user.
  • the hardened layer 222 has good hardness and strength, can protect the glass layer 221, reduce the situation that the flexible display cover 22 is scratched or easily broken under pressure, which is beneficial to improve the user experience. Since the glass layer 221 has good linear elasticity and hardly undergoes plastic deformation before brittle fracture, the flexible display cover can be restored to its original state even after a period of high temperature static bending.
  • the glass layer 221 has a high modulus (strengthened glass modulus can exceed 70 GPa), high hardness, and good protection for the display panel.
  • the glass layer has high flatness, anti-buckling and anti-crease, which can improve the appearance and texture of the flexible display module.
  • the embodiment of the present application also provides a flexible display device.
  • the flexible display device includes a housing 10 and a flexible display module 20.
  • the housing 10 has a folding portion 11 that can be folded.
  • the display module 20 is folded as the folding part 11 is folded.
  • the flexible display module 20 can be bent following the folding of the flexible display device, and unfolded following the unfolding of the flexible display device.
  • the above-mentioned flexible display module 20 includes the flexible display cover 22 introduced in the above-mentioned embodiment, and the flexible display cover 22 is used to cover the flexible screen 21 as a protective layer of the flexible display module 20.

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Abstract

本申请提供了一种柔性显示盖板、柔性显示模组和柔性显示装置，上述柔性显示盖板用于覆盖柔性显示模组的柔性屏。该柔性显示模组应用于柔性显示装置，具有可弯折性。上述柔性显示盖板包括至少两层叠置的结构，分别为玻璃层和硬化层，其中，硬化层位于玻璃层远离柔性屏的一侧，即位于玻璃层的外侧。除了基本的玻璃层和硬化层，在玻璃层靠近显示屏一侧设置防爆层或在玻璃四周添加柔性保护层可以增加玻璃层的抗冲击、抗碎裂能力，提高显示盖板的稳定性和可靠性。

Description

柔性显示盖板、柔性显示模组和柔性显示装置
相关申请的交叉引用
本申请要求在2019年7月3日提交中华人民共和国知识产权局、申请号为201910601375.6、发明名称为“柔性显示盖板、柔性显示模组和柔性显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及终端技术领域，尤其涉及到一种柔性显示盖板、柔性显示模组和柔性显示装置。
背景技术
更大的屏幕和更好的显示效果一直是便携智能电子产品追求的目标。过去十年，智能手机厂商通过取消实体键盘、用屏幕指纹取代Home键和压缩前置摄像头等方式不断增加屏占比，目前有些智能手机的全面屏的屏占比已经超过92％。继续通过缩小中框宽度等方式能够提高的屏占比已经非常有限。就在2018年某些厂商先后推出了采用柔性OLED屏幕的可折叠手机原型机，突破了原来直板手机设计的思路，即将成为新的手机发展趋势。可折叠手机折叠后只有传统手机大小(5-6英寸)，方便随身携带，而打开后却可以有平板的显示尺寸(7-8英寸)。可折叠手机一经发布就受到了广泛关注，各大手机厂商也都在紧锣密鼓地优化完善设计方案，推动可折叠手机的量产化。除了可折叠屏手机，柔性OLED屏幕在其它柔性穿戴设备、可折叠电脑等柔性电子设备上也具有巨大的应用前景。
直板手机毫米级厚度的玻璃盖板不能随柔性OLED屏幕一起弯折，因此不能直接用做可折叠手机屏幕的显示盖板。目前在柔性显示盖板的设计方案中，主要是采用透明的高分子薄膜作为盖板保护显示模组的显示屏，如聚对苯二甲酸乙二酯(PET)或聚酰亚胺(PI)塑料薄膜。PET和PI的柔韧性都非常好，弯折极限可达到R1。但高分子透明薄膜材料不具备传统玻璃盖板的一些优异性能。首先高分子薄膜表面硬度比玻璃低很多，只能通过外层涂覆透明硬化涂层(hard coats)来提高盖板的防刮和耐磨能力。其次高分子盖板模量低，无法对显示模组提供强有力的保护，而且由于高分子材料的黏弹性本质，在长时间静态弯折或者多次动态弯折后，高分子盖板会发生蠕变，难以完全恢复最初的状态。另外，高分子材料易老化疲劳，在多次弯折之后会存在一定的折痕和一定几率的疲劳断裂。
玻璃如果能够具备良好的弯折性能，或许可以成为更好的柔性屏盖板材料。超薄玻璃(UTG)就是一种既具备良好弯折性能，又在一定程度上保留了玻璃高模量、高硬度、高强度和高透过率等优异性能的潜力盖板材料。目前超薄玻璃的厚度可以做到0.03mm～0.15mm，弯折极限可达R2，常温下也不存在明显的蠕变现象。使用UTG做盖板材料也存在一些问题，主要的问题是UTG厚度降低导致的可靠性下降，容易在冲撞过程中发生脆性碎裂，也容易在划伤后产生裂纹。因此需要对UTG的表面进行一定的保护，提高其抗刮花、抗冲击和抗碎裂能力。
发明内容
本申请提供了一种包含超薄玻璃的柔性显示盖板、柔性显示模组和柔性显示装置，以解决或者改善高分子膜组成的柔性显示盖板在使用过程中易起拱、有折痕、易疲劳断裂、出现彩虹纹等问题，同时提高柔性显示盖板抗刮花、抗冲击和抗碎裂能力。
第一方面，本申请提供了一种柔性显示盖板，该柔性显示盖板用于覆盖柔性显示模组中的柔性屏。该柔性显示模组应用于柔性显示装置，具有可弯折性。上述柔性显示盖板包括至少两层叠置的结构，分别为玻璃层和硬化层。其中，玻璃层通过光学透明胶(OCA)和光学透明树脂(OCR)等连接在所述柔性显示屏上，硬化层位于玻璃层远离柔性屏的一侧，即位于玻璃层的外侧。硬化层具有较好的硬度和强度，可以保护玻璃层，减少柔性显示盖板被划伤破裂、受到冲击破碎以及碎裂后玻璃碎片飞溅的情况，有利于提高用户使用体验。由于玻璃层具有良好的线弹性，在脆性断裂前几乎不会发生塑性变形，因此，即使在高温静态弯折一段时间之后，柔性显示盖板仍可以恢复到初始状态。且玻璃层高模量(强化玻璃模量可以超过70GPa)、高硬度、可以稳定显示模组中的高分子层，减少起拱，改善平整度，提高整体显示效果。
在具体设置玻璃层时，所述玻璃层的厚度可以M 1满足：50μm≤M 1≤150μm，组成可以是钠钙玻璃、铝硅玻璃、钠铝硅玻璃、锂铝硅玻璃、磷铝硅玻璃或微晶玻璃中的任一种。一般为保证玻璃具备良好的弯折性能(例如弯折到R3不断裂)，需要对玻璃表面进行化学强化处理。化学强化处理可以在玻璃表面10-20μm厚度的范围内形成压应力层，保证玻璃在弯折到大角度时受拉伸面不会因为拉应力过大发生表面微裂纹扩展。表面压应力层的存在也提升了玻璃层和整个盖板的抗跌落和抗冲击能力，有效保护内侧的柔性显示屏等结构。
在具体设置硬化层时，所述硬化层的厚度M 2可以满足：5μm≤M 1≤50μm，材质包括UV树脂、聚氨酯树脂、丙烯酸树脂、环氧树脂、氨基树脂、醇酸树脂、有机硅树脂、硅氧烷、二氧化硅，氧化铝，氧化锆，石墨烯或金刚石中的一种或者至少两种的组合。首先,硬化层需要具备良好的弯折性和透光性，保证超薄玻璃在覆盖硬化层后弯折性能和光学性能没有明显变差。其次,硬化层与玻璃之间应该有良好的附着力，保证弯折过程中硬化层和玻璃不会分离，可优先考虑硅系材质做硬化层或者做玻璃和硬化层之间的过渡层，可以更好地保证附着力在百格测试中超过3B。再次，硬化层应对玻璃尤其是玻璃表面起到保护作用：所属硬化层的铅笔硬度应该超过2H，覆盖硬化层之后的玻璃的抗冲击性能也应有所提升。
此外，上述玻璃层的四周还具有柔性保护层。所述柔性保护层高度(在垂直于玻璃面板的方向上)与玻璃层厚度接近，所述柔性保护层厚度(从玻璃边缘垂直向外延伸距离)M 3可以满足10μm≤M 3≤200μm。该柔性保护层可以降低玻璃层因侧边应力集中导致裂纹扩展甚至整个玻璃层碎裂的风险，提高柔性显示盖板组装过程的良品率和整机的使用寿命。所述柔性保护层的材质包括硅胶、聚氨酯弹性体、热塑性弹性体、热塑性聚酯弹性体、热塑性动态硫化胶、三元乙丙橡胶中的一种或者至少两种的组合。
另一个技术方案中，柔性显示盖板还可以包括防爆层，该防爆层设置于玻璃层远离硬化层的一侧。该防爆层具有防爆性和抗冲击性，即使玻璃层出现碎裂，也不会出现碎片飞溅的问题，从而提高柔性显示盖板的可靠性和安全性。
在具体设置防爆层时，可以通过粘胶层将防爆层可靠地固定在玻璃层下面。在具体设置粘胶层时，粘胶层的材质可以根据需求选择，具体需要使粘胶层具有较好的粘接性、柔 性和透光性。具体可以为光学透明胶层，也可以为光敏胶层。所述粘胶层的厚度M 4可以满足：5μm≤M 4≤100μm。该厚度下的粘胶层具有足够的粘性，且可以减少对柔性显示模组的影响。
具体的技术方案中，防爆层的材质可以选择透明高分子柔性层或剪切增稠材料层，两种材质的防爆层均具有较好的防爆效果。在具体选择透明高分子柔性层做防爆层时，该透明高分子柔性层的厚度M 5可以满足：5μm≤M 5≤100μm。该厚度下的透明高分子柔性层具有较好的防爆效果，且具有较好的柔性。在具体选择透明高分子柔性层做防爆层时，材质可以包括聚酰亚胺、聚对苯二甲酸乙二酯、聚萘二甲酸乙二醇酯、聚碳酸酯或聚甲基丙烯酸甲酯PMMA中的任一种或者至少两种的共聚物或者至少两种的组合。用户从显示模块整体考虑和整机设计角度出发，根据需求选择该透明高分子柔性层的厚度和材质，可以使防爆层具有更好的防爆效果。
该包含防爆层的技术方案中，所述防爆层除了可以是透明高分子柔性层，也可以是剪切增稠材料层。所述剪切增稠材料层的厚度M 6满足：50μm≤M 6≤200μm。该厚度下的剪切增稠材料层可以具有足够的防爆效果，且具有较好的柔性和透光性。在具体设置防爆层时，所述剪切增稠材料层的材质可以包括以端羟基聚硅氧烷、聚氨酯、苯乙烯嵌段聚合物为基体的弹性体复合材料，或者剪切增稠流体纤维复合材料。
第二方面，本申请提供了一种柔性显示模组，该柔性显示模组至少包括柔性屏和上述任一技术方案中的柔性显示盖板，所述柔性显示盖板与所述柔性屏叠置。该柔性显示装置的盖板包括叠置的玻璃层和硬化层，硬化层具有较好的硬度和强度，可以保护玻璃层，减少柔性显示盖板被划伤或者受到压力易破碎的情况，有利于提高用户使用体验。由于玻璃层具有良好的线弹性，在脆性断裂前几乎不会发生塑性变形，因此，即使在高温静态弯折一段时间之后，柔性显示盖板仍可以恢复到初始状态。玻璃层的模量高(强化玻璃模量可超过70GPa)、硬度较高，对显示面板的保护性好，也可以稳定显示模组中的高分子层，减少起拱，改善平整度，提高整体显示效果。
第三方面，本申请提供了一种柔性显示装置，该柔性显示装置包括壳体和安装于上述壳体内的柔性显示模组。该柔性显示模组为上述技术方案中的该柔性显示模组，柔性显示装置的柔性显示盖板包括叠置的玻璃层和硬化层，硬化层具有较好的硬度和强度，可以保护玻璃层，减少柔性显示盖板被划伤或者受到压力易破碎的情况，有利于提高用户使用体验。由于玻璃层具有良好的线弹性，在脆性断裂前几乎不会发生塑性变形，因此，即使在高温静态弯折一段时间之后，柔性显示盖板仍可以恢复到初始状态。玻璃层的模量高(强化玻璃模量可超过70GPa)、硬度较高，对显示面板的保护性好。玻璃层平整度高，抗起拱，抗折痕，可以提高柔性显示模组的外观质感。
附图说明
图1为本申请实施例提供的柔性显示装置的展开状态结构示意图；
图2为本申请实施例提供的柔性显示装置的折叠状态结构示意图；
图3为本申请实施例提供的柔性显示装置的另一种结构示意图；
图4为本申请实施例提供的柔性屏的一种结构示意图；
图5为本申请实施例提供的柔性屏的另一种结构示意图；
图6为本申请实施例提供的柔性显示装置的剖面结构示意图；
图7为本申请实施例提供的柔性显示模组的一种剖面结构示意图；
图8为本申请实施例提供的柔性显示模组的另一种剖面结构示意图；
图9为本申请实施例提供的柔性显示模组的一种俯视结构示意图；
图10为本申请实施例提供的柔性显示模组的另一种剖面结构示意图；
图11为本申请实施例提供的柔性显示模组的另一种剖面结构示意图；
图12为本申请实施例提供的一种剪切增稠效应的材料的微观结构示意图；
图13为本申请实施例提供的柔性显示模组的另一种剖面结构示意图。
附图标记：
10-壳体；                             11-折叠部；
20-柔性显示模组；                     21-柔性屏；
211-刚性屏部；                        212-柔性屏部；
22-柔性显示盖板；                     221-玻璃层；
222-硬化层；                          223-柔性保护层；
224-防爆层；                          2241-基体；
2242-分散粒子；                       225-粘胶层。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
以下实施例中所使用的术语只是为了描述特定实施例的目的，而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样，单数表达形式“一个”、“一种”、“所述”、“上述”、“该”和“这一”旨在也包括例如“一个或多个”这种表达形式，除非其上下文中明确地有相反指示。
在本说明书中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。
本申请实施例提供的柔性显示盖板可以应用于可折叠的柔性显示装置，如手机、平板电脑等常见的可折叠移动终端。例如，图1示出了一种柔性显示装置在展开时的形状；图2示出了图1所示的柔性显示装置在折叠后的形状。柔性显示装置包括壳体10和柔性显示模组20，壳体10具有能够进行折叠的折叠部11，柔型显示模组20可以随着折叠部11的折叠而折叠。首先如图1中所示，在柔性显示装置展开时，柔性显示装置的壳体10展开；同时，设置在壳体10的柔性显示模组20也展开。如图2中所示，在柔性显示装置折叠时，柔性显示装置的壳体10折叠；同时，柔性显示模组20也折叠。图2中所示的柔性显示模组20在柔性显示装置折叠时位于壳体10外露的一侧，请参考图3，图3示出了另一种柔性显示装置的结构示意图，该实施例提供的柔性显示装置在折叠后，壳体10外露，而柔性显示模组20位于壳体10的内侧。由上述描述可以看出，柔性显示模组20可以实现跟随柔性显示装置中的折叠部11的折叠而弯折，跟随柔性显示装置的展开而展开。应理解， 上述仅仅为几种具体的实施例，本申请涉及的柔性显示装置可以包括任一种柔性显示模组能够实现折叠、弯折或者卷曲的柔性显示装置。
上述的柔性显示模组可以包括柔性屏、触控层及柔性显示盖板。其中，该柔性屏可以采用一个一体的柔性显示屏，如图4所示，图4示出了一种柔性屏的结构示意图，该柔性屏21也可以采用两个刚性屏部211以及位于两个刚性屏部211之间的一个柔性屏部212组成的拼接显示屏；如图5所示，图5示出了另一种柔性屏的结构示意图，该柔性屏21也可以采用至少三个刚性屏部211以及至少两个柔性屏部212时，在任意相邻两个刚性屏部211之间拼接一个柔性屏部212来实现。触控层也可以采用柔性可折叠的结构，下文将对柔性显示模组20的具体结构和构造进行详尽说明。
请参考图6，图6示出了本申请一实施例中柔性显示装置20的剖面结构示意图，本申请实施例提供的柔性显示模组20可以包括柔性屏21和柔性显示盖板22，柔性显示盖板22用于覆盖柔性屏21，作为柔性显示模组20的保护层。请参考图7，图7示出了本申请实施例提供的柔性显示模组20的另一种剖面结构示意图。该柔性显示盖板22可以包括两层结构，分别为玻璃层221和硬化层222，上述玻璃层221可以为超薄柔性玻璃层，该玻璃层221自身具有柔性，可以实现弯折。上述硬化层222与玻璃层221叠置，且位于玻璃层221远离柔性屏21的一侧，即硬化层222位于玻璃层221的外表面，即该外表面为用户使用柔性显示模组20时，玻璃层221朝向用户方向的表面。硬化层222具有较好的硬度和强度，可以保护玻璃层221，减少柔性显示盖板22被划伤或者受到压力易破碎的情况，有利于提高用户使用体验。由于玻璃层221具有良好的线弹性，在脆性断裂前几乎不会发生塑性变形，因此，即使在高温静态弯折一段时间之后，柔性显示盖板仍可以恢复到初始状态。玻璃层221的模量高(强化玻璃模量可超过70GPa)、硬度较高，对显示面板的保护性好。玻璃层平整度高，抗起拱，抗折痕，可以提高柔性显示模组的外观质感。
具体的，上述玻璃层221的厚度需要使玻璃层具有足够的柔性，还需要具有足够的强度。通常情况下，玻璃层的厚度越小，越有利于提高柔性显示盖板22的柔性，从而提高弯折效果；玻璃层的厚度越大，越有利于提高玻璃层的强度，从而不易碎裂损坏。本申请实施例这里根据大量的数据分析和模拟计算经验，认为玻璃层的厚度M 1可以满足：50μm≤M 1≤150μm。在具体设置玻璃层的厚度时，可以采用53μm、55μm、58μm、60μm、65μm、70μm、75μm、80μm、85μm、90μm、95μm、100μm、105μm、110μm、115μm、120μm、125μm、130μm、135μm、140μm或者145μm等厚度，从而实现柔性显示盖板22的柔性，以及具有足够的强度。
在具体设置该玻璃层221时，要保证玻璃在弯折过程中不断裂，需要对玻璃进行预应力强化。可以选择化学强化方法，通常选择铝硅系玻璃(包括铝硅玻璃、钠铝硅玻璃、锂铝硅玻璃或磷铝硅玻璃等)等比较容易进行力学强化的玻璃，例如可以把Na 2O-Al 2O 3-SiO 2系玻璃放入熔融硝酸钾中，在低于玻璃转变点的温度范围内，熔盐中离子半径/体积较大的钾离子(K +)替换玻璃表层中离子半径/体积较小的钠离子(Na +)，并在玻璃表面形成压力层。上述在玻璃表层形成的压应力层可以在一定程度上抑制表面微裂纹的扩展，保证玻璃在弯折过程中不断裂，并且可起到提升玻璃强度和保护柔性屏的作用。玻璃也可以为钠钙玻璃或微晶玻璃，具体的，玻璃中的化学成分比例可以根据需求进行选择。
在具体制作硬化层222时，可以通过辊涂、刷涂、喷涂、淋涂、浸涂、蒸镀、溅射镀或离子镀的工艺，在玻璃层221的表面直接制作上述硬化层222。该硬化层222可以为有 机材料，也可以为无机材料，具体可以为UV树脂、聚氨酯树脂、丙烯酸树脂、环氧树脂、氨基树脂、醇酸树脂、有机硅树脂、硅氧烷、二氧化硅，氧化铝，氧化锆，石墨烯或金刚石中的一种或者至少两种的组合。选为制作硬化层的有机材料一般可以直接采用所述辊涂、刷涂、喷涂、淋涂或浸涂等低温工艺在玻璃基板上涂布通过风干、热固化和UV(紫外线)固化等方式固化，而选为制作硬化层的无机材料，如氧化锆和氧化铝，通常需要通过真空蒸镀、溅射镀或离子镀等方法在玻璃表面成膜，或者作为填料和颜料与所述有机涂料混合后，采用所述辊涂、刷涂、喷涂、淋涂或浸涂等工艺涂布在玻璃表面。该实施例中，硬化层222可以为单一材料，也可以为复合材料。具体的，硬化层222可以由环氧树脂和氧化铝组合而成，组合工艺不限定，例如，在硬化层溶液配制时按所需比例添加上述两者材料，从而形成两种材料组合的硬化层。该硬化层222的材质硬度较高，且具有较好的柔性和较高的透光性。具体制作该硬化层222时，其厚度M 2可以满足：5μm≤M 1≤50μm。具体实施例中，该硬化层的厚度可以为8μm、10μm、12μm、15μm、18μm、20μm、23μm、25μm、29μm、30μm、31μm、34μm、35μm、38μm、40μm、42μm、45μm或47μm。使硬化层222在对玻璃层221具有足够保护效果的情况下，具有足够的柔性。在制作硬化层222时，其制作工艺、材质和厚度均可以根据需求进行设计和选择，通过合理的设计可以使硬化层222的硬度至少为2H的铅笔硬度。硬化层222的硬度达到上述程度，则对柔性的玻璃层221可以起到较好的保护效果。
本申请的技术方案中，玻璃层221具有柔性，因此厚度较薄，较为脆弱，特别是边缘区域容易受到损伤，即使是几微米的缺陷都会导致玻璃层221碎裂。为解决这个问题，请继续参考图8和图9，其中，图8示出了本申请实施例提供的柔性显示模组的另一种剖面结构示意图；图9示出了本申请实施例提供的柔性显示模组的一种俯视结构示意图。图8所示实施例中，玻璃层221的周侧还具有柔性保护层223，该柔性保护层223可以完全包覆玻璃层221的四周，也可以根据实际产品结构，仅包覆于玻璃层221易碎裂的区域。从而当玻璃层221的周侧受到压力或者任何刺激时，柔性保护层223可以吸收受到的压力，起到保护玻璃层221的作用，可以减少玻璃层221因侧边受到应力导致整个玻璃层221碎裂的情况，提高柔性显示盖板22的使用寿命。
具体设置上述柔性保护层223时，柔性保护层223的材质可以为硅胶、聚氨酯弹性体(PU)、热塑性弹性体(TPE)、热塑性聚酯弹性体(TPEE)、热塑性动态硫化胶(TPV)、三元乙丙橡胶(EPDM)中的任一种或者至少两种的组合。在制作柔性保护层223时，柔性保护层223可以为单一材料，也可以为至少两种材料组合而成的复合材料。具体的，可以使硅胶和热塑性聚酯弹性材料组合，组合工艺不限定，例如，可以在柔性保护层溶液配制时按比例添加上述两者材料。根据需求选择即可，该柔性保护层223具有一定的弹性，从而受到外界的压力时，柔性保护层223可以吸收压力，缓解玻璃层221受到的应力。
具体设置上述柔性保护层223的厚度时，既要考虑给玻璃层221的边缘提供足够的保护，又要结合玻璃层221边缘的尺寸公差。考虑到通常超薄玻璃的边缘尺寸公差在10到100微米量级，可以使柔性保护层223的厚度M 3满足10μm≤M 3≤200μm。该厚度的柔性保护层223可以起到较好的保护效果，具体的，柔性保护层的厚度越大，且柔性越好，对玻璃层221的保护效果越好。但因为保护层223和玻璃层221之间的折射率等参数不同，柔性保护层223的厚度太大可能会影响屏幕边缘的显示效果。具体的实施例中，柔性保护层223的厚度可以为20μm、30μm、50μm、80μm、100μm、120μm、130μm、150μm、170μm 或者180μm。在制作柔性保护223层时，也要结合玻璃层221边缘的尺寸公差的大小，221边缘尺寸公差偏大时应该采用柔性更好的材料填充，以减少玻璃层221边缘尺寸取极大值时受到柔性层的挤压力。
请参考图10，图10示出了本申请实施例提供的柔性显示模组的另一种剖面结构示意图，该实施例中，玻璃层221内侧还具有防爆层224，即防爆层224位于玻璃层221靠近柔性屏21的一侧，也即，玻璃层221位于硬化层222和防爆层224之间，该防爆层224具有防爆性，这样的话，即使玻璃层221出现碎裂，也不会出现飞溅的问题，从而提高柔性显示盖板22的可靠性和安全性。此外，还可以提高柔性显示盖板22的抗冲击性。请参考图11，图11示出了本申请实施例提供的柔性显示模组的另一种剖面结构示意图。具体的实施例中，该防爆层224可以通过粘胶层225粘接固定于玻璃层221，从而使防爆层224较为可靠的固定于玻璃层221下侧。具体的，该粘胶层225可以为光学透明胶层，或者也可以为光敏胶层。该粘胶层225可以具有较好的粘接性，以提高防爆层224与玻璃层221粘接的可靠性，以及防爆层224工作的可靠性；该粘胶层225还可以具有足够的柔性，以便于随柔性显示模组20进行弯折，此外，该粘胶层225还可以具有较好的透光性，以减少对柔性显示模组20显示效果的影响。
具体制作该粘胶层时，一方面粘胶层厚度需要使粘胶层225具有足够的粘性，另一方面，粘胶层225的厚度还要尽量薄，以降低对柔性显示模组的影响。具体的，该粘胶层的厚度M 4可以满足：5μm≤M 4≤100μm。具体地，粘胶层225的厚度可以为10μm、15μm、20μm、25μm、30μm、35μm、40μm、45μm、50μm、55μm、60μm、65μm、70μm、75μm、80μm、85μm、90μm或95μm等。具体可以根据粘胶层225的材质特性以及防爆层224和玻璃层221的粘接强度要求来选择合适类型的粘胶材料以及厚度来实现。
具体设置上述防爆层224时，该防爆层224可以为透明高分子柔性层，透明高分子柔性层具有一定的防爆型，具体的。该透明高分子柔性层的材质可以为聚酰亚胺(PI)、聚对苯二甲酸乙二酯(PET)、聚萘二甲酸乙二醇酯(PEN)、聚碳酸酯(PC)、环烯烃共聚物(COC)或聚甲基丙烯酸甲酯PMMA中的任一种，或者上述材质中至少两种材质的组合。用户根据需求选择和设计防爆层224的具体材质即可，以使防爆层224具有足够的防爆效果。具体设置防爆层224为透明高分子柔性层时，其厚度M 5可以满足：5μm≤M 5≤100μm，其厚度具体可以为10μm、15μm、20μm、25μm、30μm、35μm、40μm、45μm、50μm、55μm、60μm、65μm、70μm、75μm、80μm、85μm、90μm或95μm等。该厚度下的防爆层224具有较好的防爆效果，且具有较好的柔性。用户可以根据对柔性显示盖板22的防爆性要求，以及防爆层224的材质选择合适的防爆层224的厚度。
具体设置上述防爆层224时，该防爆层224可以为剪切增稠材料层，剪切增稠材料通常指的是一种非牛顿流体，其黏度随着剪切速率的增加而增加，在高速冲击下表观黏度急剧增加，这种材料可作为良好的防护材料。但是这种流体呈液体状态，使用寿命短并且抗老化性能及抗二次损伤性能弱等缺陷限制了其大规模应用。而以聚合物为基体添加分散粒子的具有这种剪切增稠效应的材料则逐渐成为发展的方向，因此，将具有剪切增稠效应的材料也称为剪切增稠材料。如图12所示，图12示出了本申请一实施例中一种剪切增稠效应的材料的微观结构示意图。图12示出了一种剪切增稠效应的材料，其在基体2241中添加了分散粒子2242，这种具有剪切增稠效应的材料在准静态载荷下呈黏性流动状态，在基体2241中添加的分散粒子2242呈均匀分散状态(如图12中a部分所示)，而在冲击载荷 F下分散粒子2242吸收能量，呈聚集状态(如图12中b部分所示)，剪切增稠效应的材料呈固体状态；因此，当受到冲击载荷F时，材料表现出抗冲击性能，且抗冲击性能随着冲击速度的提高而增强。而当冲击载荷F消失时，则基体2241中的分散粒子2242又恢复均匀分散状态(如图12中c部分所示)，表现为弹性而实现柔性弯折。从而通过使用增稠材料层作为防爆层224，可以使得防爆层224具有较好的防爆型和抗冲击性。
具体的实施例中，剪切增稠材料层的材质可以为以端羟基聚硅氧烷(PDMS)、聚氨酯(PU)和苯乙烯嵌段聚合物为基体的弹性体复合材料，在上述基体中添加分散粒子则获得具有较好剪切增稠效应的材料；或者，剪切增稠材料层的材质还可以为剪切增稠流体纤维复合材料。用户根据需求选择合适材质作为剪切增稠材料层即可。具体设置剪切增稠材料层时，剪切增稠材料层的厚度M 6可以满足：50μm≤M 6≤200μm。其厚度具体可以为55μm、60μm、65μm、70μm、75μm、80μm、85μm、90μm、95μm、100μm、105μm、110μm、115μm、120μm、125μm、130μm、135μm、140μm或者145μm，该厚度下的剪切增稠材料层可以具有足够的防爆效果，且具有较好的柔性和透光性，用户根据对柔性显示盖板22的防爆性要求，以及剪切增稠材料层的材质可以选择合适的防爆层224的厚度。
请参考图13，本申请实施例提供了一种柔性显示盖板，该柔性显示盖板采用厚度100μm的超薄柔性玻璃作为玻璃层221，通过淋涂工艺在玻璃层221外侧表面涂覆一层10μm的硬化层222，防止日常使用划伤，该硬化层222的表面铅笔硬度≥5H。通过辊涂工艺在超薄柔性玻璃层221边缘包覆一层20μm的柔性硅胶作为柔性保护层223，避免柔性玻璃层221边缘与结构件等硬物直接碰触导致碎裂。通过厚度为50μm的低模量的光学透明粘胶(OCA)作为粘胶层225，将超薄柔性玻璃层221内表面粘接剪切增稠材料层(防爆层224)，起到防止玻璃碎裂飞溅的作用，同时改善柔性显示盖板表面抗冲击性。这样图10所示的柔性显示盖板具备改善表面硬度和平整度，减少玻璃边缘碎裂的概率，防止玻璃碎裂飞溅，改善抗冲击性等优势。应理解，该实施例仅作为一种具体的实施方式。
当然在上述图13所示的柔性显示盖板中，该柔性显示盖板也可以采用厚度70μm的超薄柔性玻璃作为玻璃层221，通过喷涂工艺在玻璃层221外侧表面涂覆一层20μm的硬化层222，防止日常使用划伤，该硬化层222的表面铅笔硬度≥5H。通过辊涂工艺在超薄柔性玻璃层221边缘包覆一层20μm的柔性硅胶作为柔性保护层223，避免柔性玻璃边缘与结构件等硬物直接碰触导致碎裂。通过厚度为30μm的低模量的光学透明粘胶(OCA)作为粘胶层225，将超薄柔性玻璃层221内侧粘接柔性透明聚酰亚胺(PI)薄膜(防爆层224)，起到防止玻璃碎裂飞溅的作用。这样图10所示的柔性显示盖板具备改善表面硬度和平整度，减少玻璃边缘碎裂的概率，防止玻璃碎裂飞溅，抗冲击性等优势。应理解，该实施例也仅作为一种具体的实施方式。
如图6所示，本申请实施例还提供了一种可折叠显示模组20，该柔性显示模组20可以包括柔性屏21和上述任一实施例介绍的柔性显示盖板22，柔性显示盖板22用于覆盖柔性屏21，作为柔性显示模组20的保护层。请参考图7，上述柔性显示盖板22至少包括两层结构，分别为玻璃层221和硬化层222，上述玻璃层221可以为超薄柔性玻璃层，该玻璃层221自身具有柔性，可以实现弯折。上述硬化层222与玻璃层221叠置，且位于玻璃层221远离柔性屏21的一侧，即硬化层222位于玻璃层221的外表面，换个角度说，该外表面也就是用户使用柔性显示模组20时，玻璃层221朝向用户方向的表面。硬化层222具有较好的硬度和强度，可以保护玻璃层221，减少柔性显示盖板22被划伤或者受到压力 易破碎的情况，有利于提高用户使用体验。由于玻璃层221具有良好的线弹性，在脆性断裂前几乎不会发生塑性变形，因此，即使在高温静态弯折一段时间之后，柔性显示盖板仍可以恢复到初始状态。玻璃层221的模量高(强化玻璃模量可超过70GPa)、硬度较高，对显示面板的保护性好。玻璃层平整度高，抗起拱，抗折痕，可以提高柔性显示模组的外观质感。
继续参考图1及图2，本申请实施例还提供了一种柔性显示装置，该柔性显示装置包括壳体10和柔性显示模组20，壳体10具有能够进行折叠的折叠部11，柔型显示模组20随着折叠部11的折叠而折叠。首先如图1中所示，在柔性显示装置展开时，柔性显示装置的壳体10展开；同时，设置在壳体10的柔性显示模组20也展开。即柔性显示模组20可以实现跟随柔性显示装置的折叠而弯折，跟随柔性显示装置的展开而展开。上述柔性显示模组20包括上述实施例中介绍的柔性显示盖板22，该柔性显示盖板22用于覆盖柔性屏21，作为柔性显示模组20的保护层。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (20)

  1. 一种柔性显示盖板，用于覆盖柔性显示模组中的柔性屏，其特征在于，包括叠置的玻璃层和硬化层，所述硬化层位于所述玻璃层远离所述柔性屏的一侧。
  2. 根据权利要求1所述的柔性显示盖板，其特征在于，所述硬化层的厚度M 2满足：5μm≤M 1≤50μm。
  3. 根据权利要求1或2所述的柔性显示盖板，其特征在于，所述硬化层的材质包括UV树脂、聚氨酯树脂、丙烯酸树脂、环氧树脂、氨基树脂、醇酸树脂、有机硅树脂、硅氧烷、二氧化硅，氧化铝，氧化锆，石墨烯或金刚石中的一种或者至少两种的组合。
  4. 根据权利要求1～3任一项所述的柔性显示盖板，其特征在于，所述硬化层的硬度至少为2H的铅笔硬度。
  5. 根据权利要求1～4任一项所述的柔性显示盖板，其特征在于，所述玻璃层远离所述硬化层的一侧叠置有防爆层。
  6. 根据权利要求5所述的柔性显示盖板，其特征在于，所述防爆层包括透明高分子柔性层或者剪切增稠材料层。
  7. 根据权利要求6所述的柔性显示盖板，其特征在于，所述防爆层为透明高分子柔性层，所述透明高分子柔性层的厚度M 5满足：5μm≤M 5≤100μm。
  8. 根据权利要求6或7所述的柔性显示盖板，其特征在于，所述防爆层为透明高分子柔性层，所述透明高分子柔性层的材质包括聚酰亚胺、聚对苯二甲酸乙二酯、聚萘二甲酸乙二醇酯、聚碳酸酯或聚甲基丙烯酸甲酯、环烯烃中的任一种或者至少两种的共聚物或者至少两种的组合。
  9. 根据权利要求6所述的柔性显示盖板，其特征在于，所述防爆层为剪切增稠材料层，所述剪切增稠材料层的厚度M 6满足：50μm≤M 6≤200μm。
  10. 根据权利要求6或9所述的柔性显示盖板，其特征在于，所述防爆层为剪切增稠材料层，所述剪切增稠材料层的材质包括以端羟基聚硅氧烷、聚氨酯、苯乙烯嵌段聚合物为基体的弹性体复合材料，或者剪切增稠流体纤维复合材料。
  11. 根据权利要求1～10任一项所述的柔性显示盖板，其特征在于，所述玻璃层的周侧具有柔性保护层。
  12. 根据权利要求11所述的柔性显示盖板，其特征在于，所述柔性保护层的厚度M 3满足10μm≤M 3≤200μm。
  13. 根据权利要求11或12所述的柔性显示盖板，其特征在于，所述柔性保护层的材质包括硅胶、聚氨酯弹性体、热塑性弹性体、热塑性聚酯弹性体、热塑性动态硫化胶、三元乙丙橡胶中的一种或者至少两种的组合。
  14. 根据权利要求5～13任一项所述的柔性显示盖板，其特征在于，所述防爆层与所述玻璃层之间具有粘胶层。
  15. 根据权利要求14所述的柔性显示盖板，其特征在于，所述粘胶层包括光学透明胶层或者光敏胶层。
  16. 根据权利要求14或15所述的柔性显示盖板，其特征在于，所述粘胶层的厚度M 4满足：5μm≤M 4≤100μm。
  17. 根据权利要求1～16任一项所述的柔性显示盖板，其特征在于，所述玻璃层的厚 度M 1满足：50μm≤M 1≤150μm。
  18. 根据权利要求1～17任一项所述的柔性显示盖板，其特征在于，所述玻璃层包括钠钙玻璃、铝硅玻璃、钠铝硅玻璃、锂铝硅玻璃、磷铝硅玻璃或微晶玻璃中的任一种玻璃。
  19. 一种柔性显示模组，其特征在于，包括柔性屏和如权利要求1～18任一项所述的柔性显示盖板，所述柔性显示盖板与所述柔性屏叠置。
  20. 一种柔性显示装置，其特征在于，包括壳体和设置于所述壳体上的如权利要求19所述的柔性显示模组。
PCT/CN2020/080073 2019-07-03 2020-03-18 柔性显示盖板、柔性显示模组和柔性显示装置 WO2021000605A1 (zh)

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