WO2022110002A1 - 一种屏幕盖板、显示装置和电子设备 - Google Patents

一种屏幕盖板、显示装置和电子设备 Download PDF

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Publication number
WO2022110002A1
WO2022110002A1 PCT/CN2020/132195 CN2020132195W WO2022110002A1 WO 2022110002 A1 WO2022110002 A1 WO 2022110002A1 CN 2020132195 W CN2020132195 W CN 2020132195W WO 2022110002 A1 WO2022110002 A1 WO 2022110002A1
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WO
WIPO (PCT)
Prior art keywords
force
bearing plate
optical adhesive
screen cover
adhesive layer
Prior art date
Application number
PCT/CN2020/132195
Other languages
English (en)
French (fr)
Inventor
詹啟舜
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 CN202080099719.9A priority Critical patent/CN115398322B/zh
Priority to KR1020237020342A priority patent/KR20230107667A/ko
Priority to JP2023532415A priority patent/JP2023551003A/ja
Priority to EP20962893.2A priority patent/EP4235279A4/en
Priority to PCT/CN2020/132195 priority patent/WO2022110002A1/zh
Publication of WO2022110002A1 publication Critical patent/WO2022110002A1/zh
Priority to US18/324,345 priority patent/US20230311462A1/en

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    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • 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
    • B32B27/10—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 paper or cardboard
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • 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
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/872—Containers

Definitions

  • the present application relates to the technical field of electronic devices, and in particular, to a screen cover, a display device and an electronic device.
  • the main material of the screen cover is glass, which has the characteristics of high rigidity and is not easy to produce scratches, so as to provide good protection for the display screen.
  • plastic materials such as polyimide to replace the shielding cover made of glass. Since the screen cover made of plastic has good bendability, the screen cover can follow the flexible screen to produce good bending. However, the plastic screen cover has low hardness and is prone to scratches, thus reducing the display effect of the flexible screen.
  • the plastic screen cover is easily deformed, so that the impact force is obviously transmitted to the flexible screen. Therefore, the screen cover made of plastic cannot provide a good protection for the flexible screen.
  • the present application provides a screen cover, a display device and an electronic device with high rigidity, good bendability and strong impact resistance.
  • the present application provides a screen cover. It includes a first force-bearing plate, a second force-bearing plate and an optical adhesive layer. Wherein, the first force-bearing plate, the optical adhesive layer and the second force-bearing plate are stacked in sequence. Specifically, the optical adhesive layer is located between the first force-bearing plate and the second force-bearing plate, and is used for bonding the first force-bearing plate and the second force-bearing plate. Both the first force-bearing plate and the second force-bearing plate are flexible and transparent plates, so that they have good bendability and light transmittance.
  • the optical adhesive layer adopts a curable optical adhesive, so that the optical adhesive layer can have better rigidity and can effectively reduce the force transmission between the first force-bearing plate and the second force-bearing plate.
  • the optical adhesive layer can have better rigidity and can effectively reduce the force transmission between the first force-bearing plate and the second force-bearing plate. For example, when the first force receiving plate is pressed, a part of the pressure will be blocked, buffered and absorbed by the first force receiving plate. Another part of the pressure will be transmitted to the optical adhesive layer through the bending deformation of the first force-bearing plate. Since the optical adhesive layer has good rigidity, it can resist external force through its own structural strength, and weaken the force transmitted to the second force-bearing plate.
  • the screen cover adopts the structural form of the first force-bearing plate, the optical adhesive layer and the second force-bearing plate, which can effectively improve the overall structural rigidity of the screen cover, and at the same time, can also ensure the bending performance of the screen cover.
  • the screen cover can satisfy the relation:
  • E the first force-bearing plate is the Young's modulus of the first force-bearing plate
  • t the first force-bearing plate is the thickness of the first force-bearing plate
  • E optical adhesive layer is the Young's modulus of the optical adhesive layer
  • E The optical adhesive layer is the thickness of the optical adhesive layer
  • E the second force-bearing plate is the Young's modulus of the second force-bearing plate
  • t the second force-bearing plate is the thickness of the second force-bearing plate.
  • the material of the optical adhesive layer may be light-curable optical adhesive, heat-curable optical adhesive or other types of curable optical adhesive.
  • the curing process can be reasonably selected according to the curing type of the optical adhesive. For example, when the optical adhesive is a light-curable optical adhesive, it can be cured by an ultraviolet curing process. When the optical adhesive is a heat-curable optical adhesive, it can be cured by a heating process.
  • the specific material thereof may be a flexible material with high Young's modulus such as transparent polyimide (PI).
  • PI transparent polyimide
  • the first force bearing plate may also be made of other materials, which is not limited in this application.
  • the specific material of the second force-bearing plate may be a flexible material with a high Young's modulus, such as transparent polyimide, aramid, etc.
  • the second force bearing plate may also be made of other materials, which is not limited in this application.
  • the materials of the first force-bearing plate and the second force-bearing plate may be the same or different.
  • the outer side of the first force-bearing plate (the side away from the optical adhesive layer) can be used as a force-bearing surface.
  • the first force-bearing plate is disposed farther away from the display panel than the second force-bearing plate, so that an external force (such as the pressing of a human hand) will first act on the first force-bearing plate board, so as to play a good role in protecting the display panel.
  • the outer side of the second force-bearing plate (the side away from the optical adhesive layer) can also be used as a force-bearing surface, which is not limited in this application.
  • the thicknesses of the first force-bearing plate and the second force-bearing plate may be the same or different.
  • the thickness of the first force bearing plate may be greater than the thickness of the second force bearing plate.
  • the present application also provides a display device, comprising a display panel and the above-mentioned screen cover, where the screen cover is covered on a display surface of the display panel.
  • the second force-bearing plate in the screen cover can be attached to the display surface of the display panel through an adhesive layer, so as to realize the adhesion between the display panel and the screen cover. That is, the upper surface of the first force-receiving plate can be used as a force-receiving surface, or can be used as a touch surface of a human hand.
  • the adhesive layer can be selected from the same material as the optical adhesive layer described above, or other materials with good adhesion effect and light transmittance, which are not limited in this application.
  • the first force bearing plate can also be bonded to the display surface of the display panel, and in this case, the lower plate surface of the second force bearing plate can be used as the force bearing surface.
  • the display panel and the second force-bearing plate may be bonded through an adhesive layer, or may be arranged at intervals.
  • the display panel may be a rigid display panel or a flexible display panel.
  • the display panel when the display panel is a rigid display panel, it may specifically be a liquid crystal display panel or the like.
  • the display panel is a flexible display panel, it may specifically be an OLED display panel or the like.
  • the specific type of the display panel is not limited in this application.
  • the present application also provides an electronic device, including a casing and the above-mentioned display device.
  • the display device is fixedly mounted on the casing.
  • a accommodating cavity for accommodating electronic devices such as a processor, a battery, and a circuit board is formed between the display device and the casing.
  • the electronic device may be a tablet computer, a bar phone, a foldable mobile phone, etc.
  • the type of the electronic device is not limited in this application.
  • FIG. 1 is a schematic diagram of an application scenario of a screen cover provided by an embodiment of the present application
  • FIG. 2 is a schematic cross-sectional structure diagram of a screen cover plate provided by an embodiment of the present application
  • FIG. 3 is a schematic cross-sectional structure diagram of another screen cover provided by an embodiment of the present application.
  • FIG. 4 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional structure diagram of another display device provided by an embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present application.
  • FIG. 7 is a schematic cross-sectional structure diagram of another display device provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an exploded structure of an electronic device according to an embodiment of the present application.
  • the screen cover 01 provided in this embodiment of the present application can be applied to various types of display panels 021 such as liquid crystal screens and flexible screens (eg, OLED screens).
  • the screen cover 01 can be arranged on the display side of the display panel 021 (the upper side in the figure) to provide good protection for the display panel 021, and at the same time, it will not affect the display of the display panel 021. Effect.
  • the screen cover 01 since the screen cover 01 has good bendability, the screen cover 01 can also be well applied in flexible screens.
  • references in this specification to "one embodiment” or “some embodiments” and the like mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application.
  • appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in other embodiments,” etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless specifically emphasized otherwise.
  • the terms “including”, “including”, “having” and their variants mean “including but not limited to” unless specifically emphasized otherwise.
  • the screen cover 01 includes a first force bearing plate 10 , a second force bearing plate 20 and an optical adhesive layer 30 .
  • the first force-bearing plate 10 , the optical adhesive layer 30 and the second force-bearing plate 20 are stacked in sequence.
  • the optical adhesive layer 30 is located between the first force bearing plate 10 and the second force bearing plate 20 , and is used for bonding the first force bearing plate 10 and the second force bearing plate 20 .
  • Both the first force-bearing plate 10 and the second force-bearing plate 20 can be flexible transparent plates, so as to have good bendability and light transmittance.
  • the optical adhesive layer 30 can be a curable optical adhesive, so that the optical adhesive layer 30 can have better rigidity and can effectively reduce the force between the first force-bearing plate 10 and the second force-bearing plate 10. The transmission between the two force plates 20 . For example, when the first force bearing plate 10 is pressed, a part of the pressure will be blocked, buffered and absorbed by the first force bearing plate 10 .
  • the optical adhesive layer 30 has relatively good rigidity, it can resist external force through its own structural strength, and weaken the force transmitted to the second force bearing plate 20 . That is, the screen cover 01 adopts the structural form of the first force-bearing plate 10, the optical adhesive layer 30 and the second force-bearing plate 20, which can effectively improve the overall structural rigidity of the screen cover 01, and at the same time, can also ensure the Bending properties.
  • the material of the optical adhesive layer 30 may be a light-curing optical adhesive or a heat-curing optical adhesive.
  • the present application adopts the curable optical adhesive, so that the optical adhesive layer 30 has a larger Young's modulus and thus has a higher rigidity.
  • the Young's modulus of the non-curable optical adhesive is generally less than 0.001 GPa, while the Young's modulus of the curable optical adhesive is generally greater than 1 GPa. Therefore, compared with the non-curable optical adhesive, the Young's modulus of the cured optical adhesive will be greater than 1000 times, so that the overall rigidity of the screen cover 01 can be effectively improved.
  • the light-curable optical adhesive refers to an optical adhesive that can be cured by an ultraviolet curing process.
  • the so-called UV curing process is a process in which the photoinitiator in the optical adhesive is rapidly decomposed into free radicals under a certain intensity and wavelength of ultraviolet irradiation, which in turn initiates the polymerization of unsaturated organic compounds, and finally generates macromolecules with a cross-linked structure.
  • the photocurable optical adhesive may include a photoinitiator, a reactive diluent and a prepolymer.
  • the photoinitiator can be selected from benzoin, benzoin ether, benzoin dimethyl ether and the like.
  • Reactive diluents have both diluting and cross-linking functions in light-curable optical adhesives.
  • the reactive diluent can be selected from hydroxyethyl acrylate, hydroxypropyl methacrylate and the like.
  • the prepolymer can be selected from acrylate, urethane acrylate and the like.
  • the specific components of the photocurable optical adhesive and the ratio between the components can be adaptively selected and adjusted according to different requirements, which are not limited in this application.
  • thermosetting optical adhesive may be an adhesive in which a thermosetting resin containing a reactive group is an adhesive. Under heating conditions, the liquid binder molecules can further polymerize and cross-link to form a cured structure.
  • thermal curing optical adhesives can be made of polyurethane resin, melamine and other materials.
  • specific components of the thermally curable optical adhesive and the ratio between the components can be adaptively selected and adjusted according to different requirements, which are not limited in this application.
  • the optical adhesive layer 30 can also use other curable types of optical adhesives, and use a corresponding curing process to cure the optical adhesives, so as to increase the strength of the first stress-bearing board 10 and the second stress-bearing board 20 . To good adhesion, at the same time, it can also have good rigidity.
  • the optical adhesive in liquid or molten state may be disposed on the upper surface of the second force-bearing plate 20 by means of coating, spraying or other processes to form the optical adhesive layer 30 .
  • the first force-bearing plate 10 is placed on the upper side of the optical adhesive layer 30 , so that the lower plate surface of the first force-bearing plate 10 is fully attached to the optical adhesive layer 30 .
  • the optical adhesive layer 30 is cured by using an ultraviolet curing process or a thermal curing process.
  • the optical adhesive layer 30 may also be provided on the lower surface of the first force bearing plate 10 , or, on the lower plate surface of the first force bearing plate 10 and the second force bearing plate An optical adhesive layer 30 is provided on the upper plate surface of the 20 , and then the first force-bearing plate 10 and the second force-bearing plate 20 are bonded together.
  • first force-bearing plate 10 and the second force-bearing plate 20 can be cut into a desired shape and size (such as a rectangle), and then the first force-bearing plate 10 and the second force-bearing plate 10 and the second force-bearing plate 10 can be realized by optical glue. Bonding between the two stress plates 20 .
  • first force-bearing plate 10 and the second force-bearing plate 20 with a larger area can also be bonded by optical glue to form a preparatory material. Then, the preparatory material is cut according to the actual requirements, so as to prepare the screen cover 01 of the required shape and size.
  • the specific material thereof may be a flexible material with a relatively high Young's modulus, such as transparent polyimide (PI).
  • PI transparent polyimide
  • the first force-bearing plate 10 made of transparent polyimide material has good light transmittance and bendability, and is not easy to be broken when impacted by external force. Therefore, the overall rigidity and reliability of the screen cover 01 can be effectively guaranteed.
  • the specific material of the second force bearing plate 20 may be a flexible material with a relatively high Young's modulus, such as transparent polyimide, aramid, etc.
  • the second force-bearing plate 20 made of transparent polyimide material has good light transmittance and bendability, and is not easily broken when impacted by external force. Therefore, the overall rigidity and reliability of the screen cover 01 can be effectively guaranteed.
  • the second force-bearing plate 20 made of aramid has better light transmittance and bendability.
  • the second force-bearing plate 20 of aramid material has a higher Young's modulus, so the overall Young's modulus of the screen cover 01 can be effectively improved.
  • the screen cover 01 has better rigidity.
  • the second force-bearing plate 20 is made of aramid fiber, since the Young's modulus is higher, compared with the first force-bearing plate 10 , the second force-bearing plate 20 is easily broken when subjected to external force. Therefore, in an embodiment provided in this application, the outer side of the first force-bearing plate 10 can be used as a force-bearing surface to initially absorb and buffer external forces, so as to play a certain role in the second force-bearing plate 20. The protective effect can effectively reduce the risk of rupture of the second force-bearing plate 20.
  • the first force bearing plate 10 and the second force bearing plate 20 may be made of the same material.
  • both the first force bearing plate 10 and the second force bearing plate 20 may be made of transparent polyimide.
  • the outer side of the first force-bearing plate 10 (the side away from the optical adhesive layer 30 ) can be used as the force-bearing surface of the screen cover plate 01 .
  • external force such as pressing force or impact force, etc.
  • the first force bearing plate 10 since the first force bearing plate 10 also has a certain flexibility, the first force bearing plate 10 can buffer and absorb external force through its own elastic deformation, which can significantly reduce the force transmitted to the optical adhesive layer 30 .
  • the optical adhesive layer 30 since the optical adhesive layer 30 has good rigidity, it can further play a good blocking effect on the external force.
  • the external force is transmitted to the second force bearing plate 20 through the optical adhesive layer 30 , since the second force bearing plate 20 has a certain rigidity, the external force can be effectively blocked.
  • the second force bearing plate 20 since the second force bearing plate 20 also has a certain flexibility, the second force bearing plate 20 can buffer and absorb external force through elastic deformation.
  • the external force can be blocked, buffered and absorbed step by step, and at the same time, the damage of the structure itself due to external force can be effectively reduced.
  • first force bearing plate 10 and the second force bearing plate 20 are made of the same material, the thickness of the first force bearing plate 10 and the thickness of the second force bearing plate 20 may be the same or different.
  • the thickness of the first force bearing plate 10 may be greater than the thickness of the second force bearing plate 20 . Since the external force will first act on the first force-receiving plate 10 , by increasing the thickness of the first force-receiving plate 10 , the force-receiving performance of the first force-receiving plate 10 and the buffering and absorbing capacity of the external force can be improved.
  • the thickness of the second force bearing plate 20 may also be greater than or equal to the thickness of the second force bearing plate 20 , which is not limited in this application.
  • the outer side of the second force bearing plate 20 (the side away from the optical adhesive layer 30 ) can also be used as the force bearing surface of the screen cover plate 01 .
  • the first force bearing plate 10 and the second force bearing plate 20 may also be made of different materials.
  • the first force bearing plate 10 can be made of transparent polyimide
  • the second force bearing plate 20 can be made of aramid fiber.
  • the first force bearing plate 10 has better flexibility, and therefore can better buffer and absorb external forces.
  • the second force-receiving plate 20 has a higher Young's modulus, and therefore, has better rigidity, and is less likely to deform when subjected to external force, so as to have a better blocking effect on the transmission of the external force.
  • the outer side of the first force bearing plate 10 (the side away from the optical adhesive layer 30 ) can be used as the force bearing surface.
  • an external force such as pressing force or impact force, etc.
  • the first force-bearing plate 10 since the first force-bearing plate 10 also has a certain flexibility, the first force-bearing plate 10 can buffer and absorb external forces through elastic deformation, which can significantly reduce the force transmitted to the optical adhesive layer 30. can guarantee its own safety.
  • the external force is transmitted to the optical adhesive layer 30 through the first force bearing plate 10 , since the optical adhesive layer 30 has good rigidity, it can further play a good blocking effect on the external force.
  • the external force is transmitted to the second force-receiving plate 20 through the optical adhesive layer 30, since the second force-receiving plate 20 has better rigidity, the external force can be effectively blocked.
  • the external force can be blocked, buffered and absorbed step by step, and at the same time, the damage of the structure itself due to external force can be effectively reduced.
  • first force bearing plate 10 and the second force bearing plate 20 are made of different materials, the thickness of the first force bearing plate 10 and the thickness of the second force bearing plate 20 may be the same or different. This application does not limit this.
  • the overall Young's modulus of the screen cover 01 can be effectively improved through the combination of the first force bearing plate 10 , the second force bearing plate 20 and the optical adhesive layer 30 .
  • the screen cover 01 can meet the following requirements: The above formula requires:
  • E the first force bearing plate represents the Young's modulus of the first force bearing plate 10
  • t the first force bearing plate represents the thickness of the first force bearing plate 10
  • the E optical adhesive layer represents the Young's modulus of the optical adhesive layer 30
  • the E optical adhesive layer represents the thickness of the optical adhesive layer 30
  • E The second load bearing plate represents the Young's modulus of the second load bearing plate 20
  • t the second load bearing plate represents the thickness of the second load bearing plate 20 .
  • the overall Young's modulus of the screen cover 01 can be effectively improved through the combination of the first force bearing plate 10 , the second force bearing plate 20 and the optical adhesive layer 30 .
  • the outer side of the second force bearing plate 20 (the side away from the optical adhesive layer 30 ) can also be used as the force bearing surface of the screen cover plate 01 .
  • the screen cover 01 is not limited to include the above-mentioned one first stress plate 10 , one optical adhesive layer 30 and one second stress plate 20 .
  • the screen cover 01 may also include two or more first force bearing plates 10 and second force bearing plates 20 arranged in layers.
  • the adjacently stacked stress plates may be bonded by a curable optical adhesive, or a non-curable optical adhesive may be used for bonding.
  • hardening treatment may also be performed on the outer surface of the first force bearing plate 10 or the second force bearing plate 20 to improve the scratch resistance.
  • a hardened coating 11 may also be provided on the upper surface of the first force-receiving plate 10 .
  • the specific material of the hardened coating 11 may be acrylate or silane or the like.
  • the first force bearing plate 10 may be hardened by spraying, dipping and other processes to form a hardened coating 11 on the upper surface of the first force bearing plate 10 .
  • the hardened coating 11 may also be provided on the lower surface of the second force-bearing plate 20 to improve its scratch resistance.
  • the material, thickness and preparation process of the hardened coating 11 can be flexibly selected and adjusted, which is not limited in this application.
  • the screen cover 01 can be applied to a variety of different types of display panels to provide good protection for the display panels.
  • the thickness of the hardened coating 11 may be between 1-20 microns; the thickness of the first force bearing plate 10 may be between 20-100 microns; the thickness of the optical adhesive layer 30 may be between 0.1- between 10 microns; the thickness of the first force bearing plate 10 may be between 20-100 microns. It can be understood that, during specific implementation, the overall thickness of the screen cover 01 and the thickness of each component can be flexibly set, which is not limited in this application.
  • an embodiment of the present application further provides a display device 02 , which includes a display panel 021 and a screen cover 01 , and the screen cover 01 covers a display surface of the display panel 021 .
  • the screen cover 01 may be directly disposed on the display side (upper side in the figure) of the display panel 021 . That is, the upper surface of the first force-receiving plate 10 can be used as a force-receiving surface, or can be used as a touch surface of a human hand.
  • a hardened coating 11 may also be provided on the upper surface of the first force bearing plate 10 to improve its scratch resistance.
  • the screen cover 01 can be not only directly disposed on the display surface of the display panel 021 , but also can be glued and fixed on the display surface of the display panel 021 .
  • the second force-bearing plate 20 in the screen cover 01 can be attached to the display surface of the display panel 021 through the adhesive layer 022 to realize the adhesion between the display panel 021 and the screen cover 01 combine. That is, the upper surface of the first force-receiving plate 10 can be used as a force-receiving surface, or can be used as a touch surface of a human hand.
  • the adhesive layer 022 can be made of the same material as the optical adhesive layer 30 described above, or other materials with good adhesion effect and light transmittance, which are not limited in this application.
  • a hardened coating 11 may also be provided on the upper surface of the first force bearing plate 10 to improve its scratch resistance.
  • first force bearing plate 10 can also be bonded to the display surface of the display panel 021, and in this case, the lower plate surface of the second force bearing plate 20 can be used as the force bearing surface to use.
  • the display panel 021 and the second force bearing plate 20 may be bonded through the adhesive layer 022, or may be arranged at intervals or directly attached to each other.
  • the display panel 021 may be either a rigid display panel 021 or a flexible display panel 021 .
  • the display panel 021 when the display panel 021 is a rigid display panel 021, it may specifically be a liquid crystal display panel 021 or the like.
  • the display panel 021 When the display panel 021 is a flexible display panel 021, it may specifically be an OLED display panel 021 or the like.
  • the specific type of the display panel 021 is not limited in this application.
  • an embodiment of the present application further provides an electronic device.
  • the electronic device shown in the figure is a foldable mobile phone.
  • the casing 03 and the above-mentioned display device 02 are included.
  • the display device 02 is fixedly installed in the casing 03 , and an accommodation cavity (not shown in the figure) for accommodating electronic devices such as processors, batteries, and circuit boards is formed between the display device 02 and the casing 03 .
  • the electronic device may be a device with a touch screen function, such as a tablet computer, a bar phone, a foldable phone, a smart screen, etc.
  • a touch screen function such as a tablet computer, a bar phone, a foldable phone, a smart screen, etc.
  • the type of the electronic device is not limited in this application.

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Abstract

一种屏幕盖板（01）、显示装置（02）和电子设备，涉及电子设备技术领域，以解决屏幕盖板（01）使用性能差的技术问题；屏幕盖板（01）包括第一受力板（10）、第二受力板（20）和光学胶层（30）；第一受力板（10）和第二受力板（20）层叠设置，且第一受力板（10）和第二受力板（20）均为柔性透明板；光学胶层（30）位于第一受力板（10）和第二受力板（20）之间，用于粘合第一受力板（10）和第二受力板（20），其中，光学胶层（30）的材料为固化型光学胶。屏幕盖板（01）具有良好的可弯折性和刚性，因此，能够与柔性显示面板（021）进行良好适配，同时，还具有良好的抗碰撞能力，有利于提升显示面板（021）的安全性。

Description

一种屏幕盖板、显示装置和电子设备 技术领域
本申请涉及电子设备技术领域，尤其涉及一种屏幕盖板、显示装置和电子设备。
背景技术
随着显示技术的发展，柔性屏幕(如OLED屏幕)的产品质量和显示效果也得到了有效的提升。柔性屏幕因具有低功耗、可弯曲等特性逐渐被广泛应用在手机、笔记本电脑、显示器等电子设备中。但是，由于柔性屏幕在遭受外力(如大力按压、跌落等)时，容易出现破裂等不良情况。因此，在实际应用时，需要在柔性屏幕的外侧面(如用户的观看侧)配备屏幕盖板，以对柔性屏幕起到良好的保护作用。
目前，屏幕盖板的主要材料为玻璃，其具有刚性高、不易产生划痕等特点，从而能够为显示屏幕提供良好的保护作用。但是，玻璃材质的屏幕盖板由于可弯折性较差，当屏幕盖板跟随柔性屏幕产生弯折时，容易产生裂痕、甚至破碎，因此，不能良好的适用在柔性屏幕中。有些厂家开始采用聚酰亚胺等塑料材来替换玻璃材质的屏蔽盖板，由于塑料材质的屏幕盖板具有良好的可弯折性，因此，屏幕盖板能够跟随柔性屏幕产生良好的弯折。但是，塑料材质的屏幕盖板硬度较低，容易产生划痕，因此，会降低柔性屏幕的显示效果。另外，在遭受外力冲击(如人手的大力按压)时，塑料材质的屏幕盖板容易产生形变，使得冲击力会明显传递到柔性屏幕上。因此，塑料材质的屏幕盖板并不能为柔性屏幕起到良好的保护作用。
发明内容
本申请提供了一种刚性高、具有良好可弯折性、抗冲击性能强的屏幕盖板、显示装置和电子设备。
一方面，本申请提供了一种屏幕盖板。包括第一受力板、第二受力板和光学胶层。其中，第一受力板、光学胶层和第二受力板依次层叠设置。具体来说，光学胶层位于第一受力板和第二受力板之间，用于粘合第一受力板和第二受力板。第一受力板和第二受力板均为柔性透明板，从而具有良好的可弯折性和透光性。另外，光学胶层采用固化型光学胶，以使光学胶层能够具备较好的刚性，能够有效减弱第一受力板和第二受力板之间力的传递。例如，当第一受力板受到按压时，一部分压力会被第一受力板阻挡、缓冲和吸收。另外一部分压力会通过第一受力板的弯曲形变传递至光学胶层。由于光学胶层具有较好的刚性，因此，能够通过自身的结构强度来抵抗外力，减弱传递至第二受力板的作用力。即屏幕盖板采用第一受力板、光学胶层和第二受力板的结构形式，能够有效提升屏幕盖板的整体结构刚性，同时，还能够保证屏幕盖板的弯曲性能。
在具体实施时，屏幕盖板可以满足关系式：
Figure PCTCN2020132195-appb-000001
其中，E 第一受力板为第一受力板的杨氏模量，t 第一受力板为第一受力板的厚度；E 光学胶层为光学胶层的杨氏模量，E 光学胶层为光学胶层的厚度；E 第二受力板为第二受力板的杨氏模量，t 第二受力板为第二受力板的厚度。
在具体实施时，光学胶层的材料可以是光固化型光学胶、热固化型光学胶或者其他类型的可固化型光学胶。在具体实施时，可以根据光学胶的固化类型对固化工艺进行合理选择。例如，当光学胶为光固化型光学胶时，可以采用紫外固化工艺对其进行固化处理。当光学胶为热固化型光学胶时，可以采用加热工艺对其进行固化处理。
对于第一受力板，其具体材质可以是透明聚酰亚胺(polyimide，PI)等具备较高杨氏模量的柔性材料。当然，在其他的实施方式中，第一受力板也可以采用其他的材料进行制作，本申请对此不作限定。
对于第二受力板，其具体材质可以是透明聚酰亚胺、芳纶等具备较高杨氏模量的柔性材料。当然，在其他的实施方式中，第二受力板也可以采用其他的材料进行制作，本申请对此不作限定。
其中，第一受力板和第二受力板的材料可以相同也可以不同。另外，在进行使用时，第一受力板的外侧(远离光学胶层的一侧)可以作为受力面进行使用。例如，当屏幕盖板盖设在显示面板的显示面后，第一受力板相较于第二受力板远离显示面板设置，使得外力(如人手的按压)会首先作用在第一受力板上，从而对显示面板起到良好的保护作用。当然，在具体应用时，第二受力板的外侧(远离光学胶层的一侧)也可以作为受力面进行使用，本申请对此不作限定。
当然，在具体应用时，第一受力板和第二受力板的厚度可以相同也可以不同。例如，当第一受力板的外侧作为受力面进行使用时，第一受力板的厚度可以大于第二受力板的厚度。当第一受力板受到外力时，能够有效提升对外力的吸收、缓冲效果，同时，也能够有效提升第一受力板的结构强度。
另一方面，本申请还提供了一种显示装置，包括显示面板和上述的屏幕盖板，屏幕盖板盖设在显示面板的显示面。
在具体应用时，屏幕盖板中的第二受力板可以通过粘结层贴合在显示面板的显示面，以实现显示面板和屏幕盖板之间的粘合。即第一受力板的上板面可以作为受力面，或者，用作人手的触摸面。
在具体实施时，粘结层可以选用与上述的光学胶层相同的材料，也可以选用其他的具有良好粘合效果和透光性的材料，本申请不作限定。
可以理解的是，在另外的实施方式中，也可以将第一受力板与显示面板的显示面进行粘合，此时，第二受力板的下板面可以作为受力面进行使用。
当然，在具体应用时，显示面板和第二受力板之间即可以通过粘接层进行粘合，也可以间隔设置。
另外，显示面板既可以是硬性的显示面板也可以是柔性的显示面板。例如，当显示面板为硬性的显示面板时，其具体可以是液晶显示面板等。当显示面板为柔性的显示面板时，其具体可以是OLED显示面板等。其中，显示面板的具体类型本申请不作限制。
另一方面，本申请还提供了一种电子设备，包括壳体和上述的显示装置。其中，显示装置固定安装于壳体。显示装置和壳体之间形成有用于容纳处理器、电池、电路板等电子器件的容纳腔。
在具体实施时，电子设备可以是平板电脑、直板手机、可折叠手机等，本申请对电子设备的类型不作限定。
附图说明
图1为本申请实施例提供的一种屏幕盖板的应用场景示意图；
图2为本申请实施例提供的一种屏幕盖板的剖面结构示意图；
图3为本申请实施例提供的另一种屏幕盖板的剖面结构示意图；
图4为本申请实施例提供的一种显示装置的剖面结构示意图；
图5为本申请实施例提供的另一种显示装置的剖面结构示意图；
图6为本申请实施例提供的一种显示装置的剖面结构示意图；
图7为本申请实施例提供的另一种显示装置的剖面结构示意图；
图8为本申请实施例提供的一种电子设备的分解结构示意图。
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。
为了方便理解本申请实施例提供的屏幕盖板，下面首先介绍一下其应用场景。
如图1所示，本申请实施例提供的屏幕盖板01可以应用在液晶屏幕、柔性屏幕(如OLED屏幕)等多种类型的显示面板021中。在具体应用时，屏幕盖板01可以设置在显示面板021的显示侧(如图中的上侧)，用于为显示面板021提供良好的保护作用，同时，还不会影响显示面板021的显示效果。另外，由于屏幕盖板01具有良好的可弯折性，因此，屏幕盖板01还能够良好的应用在柔性屏幕中。
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图和具体实施例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”、“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。还应当理解，在本申请以下各实施例中，“至少一个”、“一个或多个”是指一个、两个或两个以上。术语“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系；例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。
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。
如图2所示，在本申请提供的一个实施例中，屏幕盖板01包括第一受力板10、第二 受力板20和光学胶层30。其中，第一受力板10、光学胶层30和第二受力板20依次层叠设置。具体来说，光学胶层30位于第一受力板10和第二受力板20之间，用于粘合第一受力板10和第二受力板20。第一受力板10和第二受力板20均可为柔性透明板，从而具有良好的可弯折性和透光性。当屏幕盖板01设置在显示面板(图中未示出)的显示侧时，显示面板所显示的图像画面能够高效的透过屏幕盖板01，从而能够为用户提供良好的视觉体验。另外，在本申请提供的屏幕盖板01中，光学胶层30可采用固化型光学胶，以使光学胶层30能够具备较好的刚性，能够有效减弱力在第一受力板10和第二受力板20之间的传递。例如，当第一受力板10受到按压时，一部分压力会被第一受力板10阻挡、缓冲和吸收。另外一部分压力会通过第一受力板10的弯曲形变传递至光学胶层30。由于光学胶层30具有较好的刚性，因此，能够通过自身的结构强度来抵抗外力，减弱传递至第二受力板20的作用力。即屏幕盖板01采用第一受力板10、光学胶层30和第二受力板20的结构形式，能够有效提升屏幕盖板01的整体结构刚性，同时，还能够保证屏幕盖板01的弯曲性能。
在具体实施时，光学胶层30的材料可以是光固化型光学胶，也可以是热固化型光学胶。与不可硬化的光学胶相比，本申请采用可固化的光学胶，使得光学胶层30具有较大的杨氏模量，从而具备较高的刚度。具体来说，不可固化的光学胶的杨氏模量一般都小于0.001GPa，而可固化后的光学胶的杨氏模量一般大于1GPa。因此，与不可固化的光学胶相比，固化后的光学胶的杨氏模量会大于1000倍，从而能够有效提升屏幕盖板01的整体刚度。
示例性的，光固化型光学胶指的是能采用紫外固化工艺产生固化效果的光学胶。所谓紫外固化工艺是在一定强度和波长的紫外照射下，使光学胶中的光引发剂迅速分解成自由基，进而引发不饱和有机化合物产生聚合反应，最终生成交联结构大分子的过程。在组成成分上，光固化型光学胶可以包括光引发剂、活性稀释剂和预聚物。其中，光引发剂可以选用安息香、安息香乙醚、安息香双甲醚等。活性稀释剂在光固化型光学胶中既有稀释作用，又有交联作用。活性稀释剂可以选用丙烯酸羟乙酯、甲基丙烯酸羟丙酯等。预聚物可以选用丙烯酸酯、聚氨酯丙烯酸酯等。
可以理解的是，在具体应用时，光固化型光学胶的具体组分及组分之间的配比可以根据不同需求进行适应性选择和调整，本申请对此不作限定。
示例性的，热固化型光学胶可以是含有反应性基团的热固性树脂为粘料的胶黏剂。在加热条件下，液态粘料分子可进一步聚合和交联，形成固化结构。在材料选择上，热固化型光学胶可以采用聚氨酯树脂、三聚氰胺等材料。在具体应用时，热固化型光学胶的具体组分及组分之间的配比可以根据不同需求进行适应性选择和调整，本申请对此不作限定。
在另外的实施方式中，光学胶层30也可以采用其他可固化类型的光学胶，并采用相应的固化工艺对光学胶进行固化，从而对第一受力板10和第二受力板20起到良好的粘合作用，同时，还能具备良好的刚性。
在进行制作时，可以采用涂覆、喷涂等工艺将液态或熔融态的光学胶设置在第二受力板20的上板面，以形成光学胶层30。然后将第一受力板10放置在光学胶层30的上侧，使第一受力板10的下板面与光学胶层30充分贴合。最后，采用紫外固化工艺或热固化工艺对光学胶层30进行固化处理。
可以理解的是，在另外的实施例中，也可以在第一受力板10的下板面设置光学胶层 30，或者，在第一受力板10的下板面和第二受力板20的上板面均设置光学胶层30，然后，再将第一受力板10和第二受力板20进行粘合。
另外，在具体制作时，可以先将第一受力板10和第二受力板20剪裁成所需的形状大小(如矩形)，然后，再通过光学胶实现第一受力板10和第二受力板20之间的粘合。或者，也可以先通过光学胶将较大面积的第一受力板10和第二受力板20进行粘合，以形成预备料。然后，根据实际需求对预备料进行剪裁，从而制备出所需形状大小的屏幕盖板01。
可以理解的是，屏幕盖板01的具体形状轮廓、制作工艺和制作顺序本申请不作限定。在进行制作时，可以根据实际情况对其进行灵活选择和调整。
对于第一受力板10，其具体材质可以是透明聚酰亚胺(polyimide，PI)等具备较高杨氏模量的柔性材料。其中，由透明聚酰亚胺材料所制成的第一受力板10，具有较好的透光性和可弯折性，并且，当受到外力冲击时，不易破裂。因此，能够有效保证屏幕盖板01的整体刚性和可靠性。
对于第二受力板20，其具体材质可以是透明聚酰亚胺、芳纶等具备较高杨氏模量的柔性材料。由透明聚酰亚胺材料所制成的第二受力板20，具有较好的透光性和可弯折性，并且，当受到外力冲击时，不易破裂。因此，能够有效保证屏幕盖板01的整体刚性和可靠性。由芳纶所制成的第二受力板20，具有较好的透光性可弯折性。并且，相较于透明聚酰亚胺材料的第二受力板20，芳纶材料的第二受力板20具有更高的杨氏模量，因此，能够有效提升屏幕盖板01的整体杨氏模量，使得屏幕盖板01具有更好的刚性。另外，当第二受力板20采用芳纶制成时，由于杨氏模量较高，因此，相较于第一受力板10，第二受力板20在遭受外力时容易破裂。因此，在本申请提供的一种实施例中，第一受力板10的外侧面可以作为受力面，以对外力进行初步的吸收和缓冲，从而能够对第二受力板20起到一定的保护作用，有效降低第二受力板20出现破裂等风险。
在具体实施时，第一受力板10和第二受力板20可以选用相同的材料进行制作。例如，第一受力板10和第二受力板20可以均由透明聚酰亚胺进行制作。当第一受力板10的外侧(远离光学胶层30的一侧)可以作为屏幕盖板01的受力面。当受力面受到外力(如按压力或冲击力等)时，由于第一受力板10具有一定的刚性，因此，可以对外力进行有效的阻挡。另外，由于第一受力板10还具有一定的柔性，因此，第一受力板10可通过自身的弹性形变对外力进行缓冲和吸收，能够明显降低传递至光学胶层30上的力。当外力通过第一受力板10传递到光学胶层30时，由于光学胶层30具有良好的刚性，因此，又能进一步对外力起到良好的阻挡作用。当外力通过光学胶层30传递到第二受力板20时，由于第二受力板20具有一定的刚性，因此，可以对外力进行有效的阻挡。另外，由于第二受力板20还具有一定的柔性，因此，第二受力板20可通过弹性形变对外力进行缓冲和吸收。即通过第一受力板10、光学胶层30和第二受力板20，能够逐级对外力进行阻挡、缓冲和吸收，同时，也能有效降低自身结构因遭受外力而产生损坏的情况。
可以理解的是，当第一受力板10和第二受力板20采用相同的材料进行制作时，第一受力板10的厚度和第二受力板20的厚度可以相同也可以不同。
例如，第一受力板10的厚度可以大于第二受力板20的厚度。由于外力首先会作用在第一受力板10上，因此，通过增加第一受力板10的厚度可以提升第一受力板10的受力性能以及对外力的缓冲和吸收能力。
当然，在其他的实施方式中，第二受力板20的厚度也可以大于或等于第二受力板20 的厚度，本申请对此不作限定。或者，在实际使用时，第二受力板20的外侧(远离光学胶层30的一侧)也可以作为屏幕盖板01的受力面。
另外，在一些实施方式中，第一受力板10和第二受力板20也可以选用不同的材料进行制作。例如，第一受力板10可以采用由透明聚酰亚胺进行制作、第二受力板20可以采用芳纶进行制作。其中，第一受力板10与第二受力板20相比，第一受力板10具有更好的柔性，因此，可以对外力进行更好的缓冲和吸收。第二受力板20具备更高的杨氏模量，因此，具有更好的刚性，当受到外力时，更不容易产生形变，从而能够对外力的传递起到更好的阻挡效果。或者，可以理解的是，当第一受力板10在遭受外力时，由于刚性较低，可以通过自身的弹性形变对外力进行有效的缓冲，因此，更不容易产生裂痕等情况。因此，在实际使用时，可以将第一受力板10的外侧(远离光学胶层30的一侧)作为受力面。当第一受力板10的外侧受到外力(如按压力或冲击力等)时，由于第一受力板10具有一定的刚性，因此，可以对外力进行有效的阻挡。另外，由于第一受力板10还具有一定的柔性，因此，第一受力板10可通过弹性形变对外力进行缓冲和吸收，能够明显降低传递至光学胶层30上的力，同时，还能保证自身的安全性。当外力通过第一受力板10传递到光学胶层30时，由于光学胶层30具有良好的刚性，因此，又能进一步对外力起到良好的阻挡作用。当外力通过光学胶层30传递到第二受力板20时，由于第二受力板20具备较好的刚性，因此，可以对外力进行有效的阻挡。即通过第一受力板10、光学胶层30和第二受力板20，能够逐级对外力进行阻挡、缓冲和吸收，同时，也能有效降低自身结构因遭受外力而产生损坏的情况。
可以理解的是，当第一受力板10和第二受力板20采用不同的材料进行制作时，第一受力板10的厚度和第二受力板20的厚度可以相同也可以不同。本申请对此不作限定。
在本申请提供的屏幕盖板01中，通过第一受力板10、第二受力板20和光学胶层30的结合，可以有效提升屏幕盖板01的整体杨氏模量。例如，当第一受力板10采用聚酰亚胺进行制作、第二受力板20采用芳纶进行制作、光学胶层30采用可固化的光学胶进行制作时，屏幕盖板01可以符合下述公式要求：
Figure PCTCN2020132195-appb-000002
其中，E 第一受力板表示第一受力板10的杨氏模量，t 第一受力板表示第一受力板10的厚度。E 光学胶层表示光学胶层30的杨氏模量，E 光学胶层表示光学胶层30的厚度。E 第二受力板表示第二受力板20的杨氏模量，t 第二受力板表示第二受力板20的厚度。
由此可见，通过第一受力板10、第二受力板20和光学胶层30的结合，可以有效提升屏幕盖板01的整体杨氏模量。
另外，在实际使用时，第二受力板20的外侧(远离光学胶层30的一侧)也可以作为屏幕盖板01的受力面。
当然，在实际应用时，屏幕盖板01并不仅限于包含上述的一个第一受力板10、一个光学胶层30和一个第二受力板20。例如，在屏幕盖板01中也可以包含两个或者更多个层叠设置的第一受力板10和第二受力板20。其中，相邻层叠设置的受力板之间可以通过可固化的光学胶进行粘合，也可以采用不可固化的光学胶进行粘合。
或者，在一些实施方式中，也可以在第一受力板10或第二受力板20的外侧面进行硬化处理，以提升其抗划能力。
例如，如图3所示，在本申请提供的一个实施例中，第一受力板10的上板面还可设有硬化涂层11。其中，硬化涂层11的具体材料可以是丙烯酸酯或者硅烷等。
在进行制作时，可以采用喷涂、浸入等工艺对第一受力板10进行硬化处理，以在第一受力板10的上板面形成硬化涂层11。
当然，在其他实施方式中，当第二受力板20的下板面作为受力面时，也可以在第二受力板20的下板面设置硬化涂层11，以提升其抗划能力。
可以理解的是，在具体实施时，硬化涂层11的材料、厚度以及制备工艺可以进行灵活选择和调整，本申请对此不作限定。
另外，在具体应用时，屏幕盖板01可以应用在多种不同类型的显示面板上，用于为显示面板提供良好的保护作用。
在具体实施时，硬化涂层11的厚度可以介于1-20微米之间；第一受力板10的厚度可以介于20-100微米之间；光学胶层30的厚度可以介于0.1-10微米之间；第一受力板10的厚度可以介于20-100微米之间。可以理解的是，在具体实施时，屏幕盖板01的整体厚度以及各组成部分的厚度可以进行灵活设置，本申请对此不作限定。
例如，如图4所示，本申请实施例还提供了一种显示装置02，包括显示面板021和屏幕盖板01，屏幕盖板01盖设在显示面板021的显示面。
具体来说，屏幕盖板01可以直接设置在显示面板021的显示侧(图中的上侧)。即第一受力板10的上板面可以作为受力面，或者，用作人手的触摸面。
另外，如图5所示，在具体实施时，第一受力板10的上板面还可设有硬化涂层11，以提升其抗划能力。
在具体实施时，屏幕盖板01除了可以直接设置在显示面板021的显示面以外，还可以粘接固定在显示面板021的显示面。
例如，如图6所示，屏幕盖板01中的第二受力板20可以通过粘结层022贴合在显示面板021的显示面，以实现显示面板021和屏幕盖板01之间的粘合。即第一受力板10的上板面可以作为受力面，或者，用作人手的触摸面。
在具体实施时，粘结层022可以选用与上述的光学胶层30相同的材料，也可以选用其他的具有良好粘合效果和透光性的材料，本申请不作限定。
另外，如图7所示，在具体实施时，第一受力板10的上板面还可设有硬化涂层11，以提升其抗划能力。
可以理解的是，在另外的实施方式中，也可以将第一受力板10与显示面板021的显示面进行粘合，此时，第二受力板20的下板面可以作为受力面进行使用。
当然，在具体应用时，显示面板021和第二受力板20之间即可以通过粘接层022进行粘合，也可以间隔设置或直接贴合设置。
另外，显示面板021既可以是硬性的显示面板021也可以是柔性的显示面板021。例如，当显示面板021为硬性的显示面板021时，其具体可以是液晶显示面板021等。当显示面板021为柔性的显示面板021时，其具体可以是OLED显示面板021等。其中，显示面板021的具体类型本申请不作限制。
另外，如图8所示，本申请实施例还提供了一种电子设备，具体来说，图中所示出的 电子设备为可折叠手机。包括壳体03和上述的显示装置02。其中，显示装置02固定安装于壳体03中，且显示装置02和壳体03之间形成有用于容纳处理器、电池、电路板等电子器件的容纳腔(图中未示出)。
在具体实施时，电子设备可以是平板电脑、直板手机、可折叠手机、智慧屏等具有触摸屏幕功能的设备，本申请对电子设备的类型不作限定。
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 (11)

  1. 一种屏幕盖板，其特征在于，包括：第一受力板和第二受力板；
    其中，所述第一受力板和所述第二受力板层叠设置，且所述第一受力板和所述第二受力板均为柔性透明板；
    光学胶层，位于所述第一受力板和所述第二受力板之间，用于粘合所述第一受力板和所述第二受力板；
    其中，所述光学胶层的材料为固化型光学胶。
  2. 根据权利要求1所述的屏幕盖板，其特征在于，所述屏幕盖板满足关系式：
    Figure PCTCN2020132195-appb-100001
    其中，E 第一受力板为所述第一受力板的杨氏模量，t 第一受力板为所述第一受力板的厚度；E 光 学胶层为所述光学胶层的杨氏模量，E 光学胶层为所述光学胶层的厚度；E 第二受力板为所述第二受力板的杨氏模量，t 第二受力板为所述第二受力板的厚度。
  3. 根据权利要求1或2所述的屏幕盖板，其特征在于，所述光学胶层的材料为光固化型光学胶或热固化型光学胶。
  4. 根据权利要求1至3中任一所述的屏幕盖板，其特征在于，所述第一受力板的材质为聚酰亚胺。
  5. 根据权利要求1至4中任一所述的屏幕盖板，其特征在于，所述第二受力板的材质为聚酰亚胺或芳纶。
  6. 根据权利要求1至5中任一所述的屏幕盖板，其特征在于，所述屏幕盖板还包括硬化涂层；
    所述硬化涂层位于所述第一受力板的远离所述光学胶层的板面。
  7. 根据权利要求6所述的屏幕盖板，其特征在于，所述硬化涂层的材质为丙烯酸酯或硅烷。
  8. 根据权利要求1至7中任一所述的屏幕盖板，其特征在于，所述第一受力板的柔性大于或等于所述第二受力板的柔性。
  9. 根据权利要求1至8中任一所述的屏幕盖板，其特征在于，所述第一受力板的厚度小于或等于所述第二受力板的厚度。
  10. 一种显示装置，其特征在于，包括显示面板和如权利要求1至9中任一所述的屏幕盖板；
    所述屏幕盖板设置在所述显示面板的显示面，且所述第一受力板相较于所述第二受力板远离所述显示面板设置。
  11. 一种电子设备，其特征在于，包括壳体和如权利要求10所述的显示装置；
    所述显示装置固定安装于所述壳体内。
PCT/CN2020/132195 2020-11-27 2020-11-27 一种屏幕盖板、显示装置和电子设备 WO2022110002A1 (zh)

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