WO2022252560A1 - 用于显示屏的盖板、盖板制备方法及显示装置 - Google Patents

用于显示屏的盖板、盖板制备方法及显示装置 Download PDF

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Publication number
WO2022252560A1
WO2022252560A1 PCT/CN2021/137873 CN2021137873W WO2022252560A1 WO 2022252560 A1 WO2022252560 A1 WO 2022252560A1 CN 2021137873 W CN2021137873 W CN 2021137873W WO 2022252560 A1 WO2022252560 A1 WO 2022252560A1
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WO
WIPO (PCT)
Prior art keywords
cover plate
film layer
display screen
thickness
plastic body
Prior art date
Application number
PCT/CN2021/137873
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English (en)
French (fr)
Inventor
刘仁杰
彭兆基
陆胜林
Original Assignee
合肥维信诺科技有限公司
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Publication date
Application filed by 合肥维信诺科技有限公司 filed Critical 合肥维信诺科技有限公司
Publication of WO2022252560A1 publication Critical patent/WO2022252560A1/zh
Priority to US18/341,227 priority Critical patent/US20230337385A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • 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
    • B32B27/30—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
    • 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
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/004—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/008—Watch crystals; Fastening or sealing of crystals; Clock glasses with means for magnified reading
    • 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
    • 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
    • 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
    • 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
    • B32B2307/536—Hardness
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/56—Damping, energy absorption
    • 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
    • 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
    • B32B2571/00—Protective equipment

Definitions

  • the application belongs to the technical field of electronic products, and in particular relates to a cover plate for a display screen, a preparation method of the cover plate and a display device.
  • the flexible display screen has the characteristics of being bendable.
  • people can bend or fold the display device, so that it can be applied to wearable devices such as watches, bringing convenience to people's carrying and using the display device.
  • the hardness and dimensional stability of the cover plate of the existing flexible display screen are not enough to protect the display screen well.
  • the internal display devices are often arranged relatively compact or relatively small in size. Small, affecting the display effect.
  • the embodiment of the present application provides a cover plate for a display screen, a preparation method of the cover plate and a display device. Display the display effect of the device.
  • an embodiment of the present application provides a cover plate for a display screen, the cover plate includes a central area, and an edge area located at least part of the peripheral side of the central area, and the thickness of the cover plate is determined by the The central area gradually decreases to the edge area; the cover plate includes a laminated plastic body and at least one first stable film layer; the thickness of at least one of the plastic body and the first stable film layer is determined by the The central area gradually decreases to the edge area.
  • the thickness of one of the plastic body and the at least one first stabilizing film layer gradually decreases from the central region to the edge region, and the other is Structures with equal thickness.
  • the thickness of the plastic body gradually decreases from the central region to the edge region
  • the at least one first stabilizing film layer is multi-layered
  • the multi-layered first Each layer in a stable film layer is a structure with equal thickness.
  • the plastic body has a structure of equal thickness, the thickness of at least one layer of the first stabilizing film layer gradually decreases from the central region to the edge region, and the At least one first stable film layer is multi-layer, the thickness of the film layer away from the plastic main body in the multi-layer first stable film layer gradually decreases from the central area to the edge area, and the multi-layer
  • the film layers close to the plastic main body in the first stable film layer have a structure of equal thickness.
  • the inner surface of the cover plate that covers the object is a curved surface that is curved with a first curvature along a first trajectory
  • the outer surface of the cover plate that is in contact with the outside is a curved surface along the first trajectory.
  • the second curvature at the point where the perpendicular line perpendicular to the direction of the cover plate intersects the outer surface is greater than or equal to the second curvature at the point where the perpendicular line perpendicular to the direction of the cover plate intersects the outer surface first curvature.
  • the inner surface of the cover plate that covers the object is a plane
  • the outer surface of the cover plate that is in contact with the outside is a curved surface that is curved along a second trajectory with a second curvature.
  • the cross section of the cover plate in a section perpendicular to the first direction, is an arcuate surface with a thick middle and thin sides.
  • the orthographic projection of the cover plate in the horizontal plane is one of rectangle, ellipse, circle, quasi-ellipse and quasi-circle.
  • the maximum thickness of the central region of the plastic body is 1.2mm-1.7mm, and the minimum thickness of the edge region of the plastic body is 0.6mm-1.2mm.
  • a hardening coating is further included, and the hardening coating is provided on a side of the first stable film layer away from the plastic main body.
  • the hardness h1 of the first stable film layer provided with the hardened coating satisfies the relationship between the hardness h2 of the first stable film layer and the hardness h3 of the plastic body : h1>h2>h3.
  • the hardness h1 of the first stable film layer provided with the hardened coating layer is greater than or equal to 6H on the Mohs scale.
  • the maximum thickness of the first stabilizing film layer is smaller than the maximum thickness of the plastic body.
  • the maximum thickness of the first stable film layer is 0.1mm-0.4mm.
  • the embodiment of the present application also provides a method for preparing a cover plate, the cover plate has a central area and an edge area located at least partially around the central area, comprising: forming a plastic body by injection molding through a first mold; The first stabilizing film layer is compounded on the outer surface of the plastic main body by hot melting, wherein the thickness of at least one of the plastic main body and the first stabilizing film layer is from the central region to the edge The area gradually decreases.
  • the step of compounding the first stabilizing film layer on the outer surface of the plastic main body by hot melting it further includes: hardening the surface of the first stabilizing film layer away from the plastic main body. cloth handle.
  • the embodiment of the present application also provides a display device, including: a cover plate, which is the cover plate used for the display screen in the above embodiment; side.
  • the cover plate for the display screen in the embodiment of the present application includes a central area and an edge area located at least partially around the central area, and the thickness of the cover plate gradually decreases from the central area to the edge area.
  • the outer surface of the cover plate in contact with the outside world is an arc-shaped surface that protrudes outward relative to the inner surface of the cover plate and the object, that is, it appears as a convex lens that is thicker in the center and thinner on the peripheral side.
  • the thickness of at least one of the plastic body and the first stable film layer can gradually decrease from the central area to the edge area in the thickness direction of the cover plate.
  • the hardness and dimensional stability of the cover plate can be improved by providing the first stabilizing film layer.
  • the cover plate provided by the embodiment of the present application has high hardness and dimensional stability, and has a mirror magnification effect, increases the viewing angle, and improves the display effect of the display device in the display screen.
  • FIG. 1 is a schematic structural view of a cover plate according to an embodiment of the present application.
  • Fig. 2 is a cross-sectional view along the B-B direction in an embodiment of Fig. 1;
  • FIG. 3 is a schematic structural view of a cover plate according to another embodiment of the present application.
  • Fig. 4 is a sectional view along the B-B direction in another embodiment of Fig. 1;
  • FIG. 5 is a flow chart of a method for preparing a cover plate according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of the preparation of a plastic body in an embodiment of the present application.
  • Fig. 7 is a schematic diagram of the preparation of covering the first stable film layer on the outer surface of the plastic body in an embodiment of the present application
  • Fig. 8 is a schematic diagram of the preparation of the cover plate in an embodiment of the present application.
  • a cover plate for a display screen a method for preparing the cover plate, and a display device according to an embodiment of the present application will be described in detail below with reference to FIG. 1 to FIG. 8 .
  • an embodiment of the present application provides a cover plate 100 for a display screen.
  • the cover plate 100 includes a central area AA and an edge area PA located at least partially around the central area AA.
  • the cover plate 100 The thickness gradually decreases from the central area AA to the edge area PA.
  • the cover plate 100 includes a laminated plastic body 1 and at least one first stable film layer 2; at least one of the plastic body 1 and the first stable film layer 2 The thickness gradually decreases from the central area AA to the peripheral area PA.
  • the cover plate 100 for the display screen in the embodiment of the present application includes a central area AA, and an edge area PA located at least partially around the central area AA, and the thickness of the cover plate 100 gradually increases from the central area AA to the edge area PA. reduced, so that the outer surface of the cover plate 100 in contact with the outside world is an arc-shaped surface that protrudes outward relative to the inner surface of the cover plate 100 that covers the object, that is, it is thicker in the center and thinner on the peripheral side. convex lens. According to the imaging principle of the convex lens, specifically, the thickness of at least one of the plastic body 1 and the first stable film layer 2 can be gradually reduced from the central area AA to the edge area PA in the thickness direction of the cover plate 100 .
  • the hardness and dimensional stability of the cover plate 100 can be improved by providing the first stabilizing film layer 2 .
  • the cover plate 100 provided by the embodiment of the present application has high hardness and dimensional stability, and has a mirror magnification effect, which increases the viewing angle and improves the display effect of the display device in the display screen.
  • the cover plate 100 for the display screen in the embodiment of the present application includes a central area AA, an edge area PA located at least part of the peripheral side of the central area AA, at least part of the peripheral area PA can be located at The edge areas on both sides of the central area may also be the edge areas located around the central area as shown in FIG. 3 .
  • the cover plate 100 includes a plastic body 1 and at least one first stabilizing film layer 2 arranged in layers.
  • the plastic body 1 includes opposite inner surfaces 11 and outer surfaces 12, the inner surface 11 of the plastic body 1 is covered with an object, and the first stable film layer 2 is at least partially covered on the outer surface 12 of the plastic body 1, that is, formed with plasticity
  • the main body 1 is the inner surface
  • the first stable film layer 2 is the outer surface of the cover plate 100 .
  • the thickness of at least one of the plastic body 1 and the first stable film layer 2 can be reduced from the central area AA in the thickness direction of the cover plate 100 It gradually decreases to the edge area PA, so that the overall film thickness of the laminated plastic body 1 and the first stable film layer 2 gradually decreases from the central area AA to the edge area PA.
  • the thickness of at least one of the plastic main body 1 and the first stable film layer 2 gradually decreases from the central area AA to the edge area PA in the thickness direction of the cover plate 100 means that, on the one hand, the plastic main body 1 and the The thickness of the first stable film layer 2 gradually decreases from the central area AA to the edge area PA.
  • the thickness of one of the plastic body 1 and the first stable film layer 2 can also be gradually reduced from the central area AA to the edge area PA, and the other has an equal thickness structure. Specifically, the thickness of the plastic body 1 gradually decreases from the central area AA to the edge area PA, and at least one layer of the first stable film layer 2 has an equal thickness; if at least one layer of the first stable film layer is multi-layered , each of the multiple layers of the first stable film layer has a structure with equal thickness.
  • the plastic body 1 is of equal thickness, and the thickness of at least one layer of the first stable film layer 2 gradually decreases from the central area AA to the edge area PA to have an equal thickness; if at least one layer of the first stable film layer is more than When layering, the thickness of the film layer far away from the plastic body in the multi-layer first stable film layer gradually decreases from the central area to the edge area, and the thickness of the multi-layer first stable film layer close to the
  • the membrane layers of the plastic body are structures of equal thickness.
  • the other first stable film layers are film layers with equal thickness.
  • the first stable film layer in contact with the plastic body in the multilayer is a film layer with equal thickness.
  • the thickness of the plastic body 1 gradually decreases from the central area AA to the peripheral area PA, and the first stabilizing film layer 2 has the same thickness as an example.
  • the extension direction of the plastic body 1 along the transverse direction is defined as the first direction X
  • the extension direction along the longitudinal direction is defined as the second direction Y
  • the central area AA of the plastic body 1 is defined as the center line of the plastic body 1 along the first direction X.
  • Reference, a partial area extending along the second direction Y, and the edge area PA is the two side areas connected to the central area AA.
  • the thickness of the cover plate 100 and the plastic body 1 and the first stable film layer 2 of the cover plate 100 specifically refers to the length of the plastic body 1 and the first stable film layer 2 along the direction perpendicular to the first direction X .
  • the thickness of the plastic body 1 gradually decreases from the central area AA to the edge area PA, that is, the outer surface 12 is formed as an arc-shaped surface that protrudes outward relative to the inner surface 11, and its surface is formed by the plastic body 1 along the first Based on the center line of one direction X, along the second direction Y, the plastic body 1 gradually decreases from the central area AA to the peripheral area PA and transitions in an arc, that is, it appears as a convex lens that is thicker in the center and thinner on both sides.
  • the convex lens will enlarge the display device in the display screen, so that the cover plate 100 has the effect of increasing the viewing angle .
  • the thickness of the central area AA of the cover plate 100 and the distance between the central area AA and the devices in the display screen will affect the mirror magnification ratio of the cover plate 100, so the inner surface and outer surface of the cover plate 100 can be adjusted Size structure, to improve the display effect of the display screen.
  • the inner surface of the cover plate 100 that covers the object is a curved surface along a first trajectory with a first curvature
  • the outer surface 12 of the cover plate 100 that contacts the outside is a curved surface along a second trajectory with a second curvature.
  • Curved curved surface; the second curvature at the point where the perpendicular to the direction of the cover intersects the outer surface is greater than or equal to the first curvature at the point where the perpendicular to the direction of the cover intersects the outer surface.
  • the curvature of the curve of the inner surface along the first direction X in the longitudinal section is the first curvature
  • the curvature of the curve of the outer surface along the first direction X in the longitudinal section is the second curvature.
  • the outer surface of the cover plate 100 can be set as a curved surface to be suitable for various display screens.
  • the second curvature at the point where the vertical line perpendicular to the direction of the cover plate intersects the outer surface can be greater than or equal to the second curvature perpendicular to the direction of the cover plate.
  • the first curvature at the point where the vertical line intersects the outer surface to ensure that the image is not distorted after the light is refracted between the inner surface and the outer surface.
  • the specific values of the second curvature and the first curvature and the difference between them can be adjusted according to actual conditions, and are not specifically limited here.
  • the inner surface of the cover plate can also be a plane
  • the outer surface can be a curved surface with a second curvature along the track extending along the first direction X, that is, a plano-convex mirror.
  • the outer surface is a convex curved surface that protrudes away from the inner surface relative to the inner surface, so as to form a plano-convex mirror or a convex lens.
  • plano-convex mirrors are more reliable in protecting the devices in the display screen, and are also convenient for application in wearable devices.
  • the inner surface 11 of the plastic body 1 can be set as a curved surface or plane curved with the first curvature along the first track
  • the outer surface 12 can be set as The curvature adjustment of the inner surface and the outer surface of the cover plate 100 is realized as a curved surface curved with the second curvature along the second track.
  • the cross section of the cover plate is an arcuate surface with a thick middle and thin sides.
  • the curvature of the two side surfaces of the arcuate surface is specifically determined by the surface curvature of the plastic body 1 and the first stable film layer 2 .
  • the specific shape of the cover plate 100 can be adjusted according to the requirements of the display device, as long as its thickness gradually decreases from the central area AA to the edge PA area, and its specific shape is not specifically limited here.
  • the outer contour of the cover plate 100 can be a straight line or a curved line, that is, when the cross section of the cover plate is an arcuate surface with a thick middle and thin sides, the orthographic projection of the cover plate 100 in the horizontal plane can be rectangular or elliptical. Any of shape, circle, quasi-ellipse, quasi-circle.
  • the cover plate 100 can be applied to display screens of different sizes and shapes, so as to meet the needs of different types of display devices.
  • the maximum thickness of the central area AA of the plastic body 1 is 1.2mm-1.7mm, and the minimum thickness of the edge area PA of the plastic body 1 is 0.6mm-1.2mm.
  • the thickness of the central area AA should be greater than the thickness of the edge area PA; on the other hand, in order to ensure the overall hardness and dimensional stability of the cover plate 100, the minimum thickness of the edge area PA should not be too thin. Therefore, the thicknesses of the central area AA and the peripheral area PA can be adjusted according to actual conditions, that is, to meet the design requirements while ensuring a smooth transition between the central area AA and the peripheral area PA.
  • the maximum thickness of the first stabilizing film layer 2 provided on the side of the outer surface 12 of the plastic body 1 is smaller than the maximum thickness of the plastic body 1 .
  • the maximum thickness of the first stabilizing film layer 2 is 0.1 mm ⁇ 0.4 mm, which can effectively ensure the overall hardness and dimensional stability of the cover plate 100 .
  • the cover plate further includes a hard coating 3 , and the hard coating 3 is provided on the side of the first stable film layer 2 away from the plastic body 1 .
  • the hardness of the cover plate 100 can be further enhanced, ensuring the safety of the display device and improving the service life of the display screen.
  • the cover plate 100 further includes a second stabilizing film layer 8 covering the inner surface 11 of the plastic body 1 .
  • the second stabilizing film layer 8 can be made of the same material as the first stabilizing film layer 2 , that is, the stabilizing film layers are provided on both the inner and outer sides of the plastic body 1 .
  • the hardness h1 of the first stable film layer 2 provided with the hardened coating 3 and the hardness h2 of the first stable film layer 2 and the hardness h3 of the plastic body 1 meet Relationship: h1>h2>h3, that is to ensure that the hardness of the cover plate 100 can be enhanced after covering the first stable film layer 2 on the plastic body 1 .
  • the first stable film layer 2 provided with the hardened coating 3 specifically refers to the first stable film layer 2 after hardening treatment by setting the hardened coating 3, and the first stable film layer 2 after the hardening treatment has Higher hardness.
  • the hardness h1 of the first stable film layer 2 provided with the hardened coating 3 ⁇ Mohs hardness 6H, the material of the plastic body 1 can be set to polycarbonate (PC), and the PC material has a certain light transmittance , taking into account a certain degree of flexibility, the flexibility of the organic material can be used to improve the bendability of the cover plate, so that the plastic body 1 can also release part of the external force through deformation under the impact of external force, so as to reduce the impact of external force on the cover plate 100 .
  • the first stable film layer 2 includes one or more of a polyimide layer (PI), a polyethylene layer (PE) and a polymethyl methacrylate layer (PMMA), and the PMMA material has high transparency.
  • the first stable film layer 2 made of PMMA material with high hardness is set as the inner layer of the cover plate 100.
  • the outer layer means that the cover plate 100 has the advantages of high dimensional stability and high hardness, so as to satisfy the use of wearable devices and increase the service life.
  • the hard coating 3 can be set as a hard coat (Hard Coat, HC) film
  • the HC film is a film-shaped material formed by curing a hard coat material or a film with hard coat treatment on both sides of the film substrate.
  • the present application also provides a cover plate preparation method
  • the cover plate 100 has a central area AA, and an edge area PA located at least partially around the central area AA
  • the cover plate preparation method includes:
  • S120 Composite the first stabilizing film layer 2 on the outer surface 12 of the plastic body 1 by hot-melting, wherein the thickness of at least one of the plastic body 1 and the first stabilizing film layer 2 is from the central area AA to the edge area PA slowing shrieking.
  • the first mold 4 includes a first groove 41 , the first groove 41 corresponds to the shape and size of the plastic body 1 , and the plastic body 1 can be injection molded through the first mold 4 .
  • the concave degree of the first groove 41 gradually decreases from the central area AA to the peripheral area PA, so that the thickness of the injection-molded plastic body 1 gradually decreases from the central area AA to the peripheral area PA, so as to achieve a mirror magnified display effect.
  • the injection molding material can be made of PC to ensure good dimensional stability and toughness under the premise of improving light transmittance.
  • the first stable film layer 2 is compounded on the outer surface 12 of the plastic body 1 by hot melting, so that the cover plate 100 has good dimensional stability and toughness at the same time.
  • the first stable film layer 2 can be stably arranged on the outer surface 12 of the plastic body 1, and the second mold 5 and the third mold 6 can be arranged up and down, and the plastic body 1 and the first stable film layer 2 are stacked on the second mold 5 and the third mold 6, and the first stable film layer 2 is arranged on the outer surface 12 of the plastic body 1, and the second mold 5 and the third mold 6 are pressed by hot melting, so that the first stable film can be realized
  • the layer 2 is firmly composited on the outer surface 12 of the plastic body 1 .
  • the inner surface 11 of the plastic body 1 is a curved surface with a first curvature
  • the outer surface 12 is a curved surface with a second curvature
  • a second mold 5 protruding with the first curvature can be provided, and the second curvature is concave.
  • the third mold 6, by abutting the convex part of the second mold 5 against the inner surface 11 of the plastic body 1, and abutting the concave part of the third mold 6 against the outer surface of the first stable film layer 2, through By pressing the second mold 5 and the third mold 6, the first stable film layer 2 can be stably compounded on the outer surface 12 of the plastic body 1 .
  • the surface of the first stable film layer 2 facing away from the plastic body 1 can also be subjected to HC coating treatment, wherein the HC coating can be cured by using a nano-hard coating, specifically through a dimpled coating roller Or spray the nano hard coating on the surface of the first stable film layer 2 facing away from the plastic body 1 , and form a hard coating 3 after curing to form a film, so as to further increase the hardness of the cover plate 100 .
  • the embodiment of the present application also provides a display device, including a cover plate 100 and a display screen.
  • the cover plate is the cover plate 100 for the display screen in the above embodiment, and the cover plate 100 is arranged on the light emitting side of the display screen.
  • the safety of each device in the display screen is ensured; on the other hand, the display device in the display screen can be magnified by a mirror, thereby increasing the viewing angle.
  • the display device provided by the embodiment of the present application has the technical effect of the technical solution for the cover plate of the display screen in any of the above embodiments, and the same or corresponding structures and terminology explanations of the above embodiments will not be repeated here.
  • the display device provided in the embodiment of the present application can be a wearable device, or any electronic product with a display function, including but not limited to the following categories: TV, notebook computer, desktop display, tablet computer, digital camera, smart Bracelets, smart glasses, vehicle displays, medical equipment, industrial control equipment, touch interaction terminals, etc., are not specifically limited in this embodiment of the present application.

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Abstract

一种用于显示屏的盖板（100）、盖板（100）制备方法及显示装置，盖板（100）包括中心区域（AA）、位于中心区域（AA）至少部分周侧的边缘区域（PA），盖板（100）的厚度由中心区域（AA）至边缘区域（PA）逐渐减小；盖板（AA）包括层叠设置的可塑性主体（1）和至少一层第一稳固膜层（2）；可塑性主体（1）和第一稳固膜层（2）中的至少一者的厚度由中心区域（AA）至边缘区域（PA）逐渐减小。

Description

用于显示屏的盖板、盖板制备方法及显示装置
相关申请的交叉引用
本申请要求享有于2021年05月31日提交的名称为“用于显示屏的盖板、盖板制备方法及显示装置”的中国专利申请第202121197400.8号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请属于电子产品技术领域，尤其涉及一种用于显示屏的盖板、盖板制备方法及显示装置。
背景技术
随着智能终端技术的发展，智能终端屏幕不再局限于平面，更多制造商开始尝试在智能终端上采用曲面屏幕。柔性显示屏具有可弯折等特点，利用显示屏的柔性，人们可以将显示装置进行弯折或折叠，从而可应用于手表等穿戴式装置中，给人们的携带和使用显示装置带来便利。然而，现有的柔性显示屏的盖板硬度和尺寸稳定性不够，不能对显示屏起到很好的保护作用，同时由于屏体内部空间有限，其内部显示器件往往设置的较为紧凑或尺寸较小，影响显示效果。
因此，亟需一种新的用于显示屏的盖板、盖板制备方法及显示装置。
申请内容
本申请实施例提供了一种用于显示屏的盖板、盖板制备方法及显示装置，盖板具有高硬度和尺寸稳定性，且具有镜面放大效果，增大了视角，提高了显示屏内显示器件的显示效果。
第一方面，本申请实施例提供了一种用于显示屏的盖板，所述盖板包括中心区域、位于所述中心区域至少部分周侧的边缘区域，所述盖板的厚度由所述中心区域至所述边缘区域逐渐减小；所述盖板包括层叠设置的可 塑性主体和至少一层第一稳固膜层；所述可塑性主体和第一稳固膜层中的至少一者的厚度由所述中心区域至所述边缘区域逐渐减小。
在本申请一方面的一些实施例中，所述可塑性主体和所述至少一层第一稳固膜层中的一者的厚度由所述中心区域至所述边缘区域逐渐减小，另一者为具有相等厚度的结构。
在本申请一方面的一些实施例中，所述可塑性主体的厚度由所述中心区域至所述边缘区域逐渐减小，所述至少一层第一稳固膜层为多层，多层所述第一稳固膜层中的每一层为具有相等厚度的结构。
在本申请一方面的一些实施例中，所述可塑性主体为相等厚度的结构，至少一层所述第一稳固膜层的厚度由所述中心区域至所述边缘区域逐渐减小，并且所述至少一层第一稳固膜层为多层，多层所述第一稳固膜层中远离所述可塑性主体的膜层的厚度由所述中心区域至所述边缘区域逐渐减小，多层所述第一稳固膜层中靠近所述可塑性主体的膜层为相等厚度的结构。
在本申请一方面的一些实施例中，所述盖板与物体盖合的内表面为沿第一轨迹以第一曲率弯曲的曲面，所述盖板与外界接触的外表面为沿所述第二轨迹以第二曲率弯曲的曲面，在垂直于盖板方向的垂线与外表面相交的点处的第二曲率大于或等于在垂直于盖板方向的垂线与外表面相交的点处的第一曲率。
在本申请一方面的一些实施例中，所述盖板与物体盖合的内表面为平面，所述盖板与外界接触的外表面为沿第二轨迹以第二曲率弯曲的曲面。
在本申请一方面的一些实施例中，在沿垂直于第一方向的截面内，所述盖板的横断面呈中间厚两边薄的弓形面。
可选地，所述盖板在水平面内的正投影呈矩形、椭圆形、圆形、类椭圆形、类圆形中的一种。
在本申请一方面的一些实施例中，所述可塑性主体的所述中心区域的最大厚度为1.2mm～1.7mm，所述可塑性主体的所述边缘区域的最小厚度为0.6mm～1.2mm。
在本申请一方面的一些实施例中，还包括硬化涂层，所述硬化涂层设于所述第一稳固膜层背离所述可塑性主体一侧。
在本申请一方面的一些实施例中，设有所述硬化涂层的所述第一稳固膜层的硬度h1与所述第一稳固膜层的硬度h2与所述可塑性主体的硬度h3满足关系：h1＞h2＞h3。
可选地，设有所述硬化涂层的所述第一稳固膜层的硬度h1≥莫氏硬度6H。
在本申请一方面的一些实施例中，所述第一稳固膜层的最大厚度小于所述可塑性主体的最大厚度。
可选地，所述第一稳固膜层的最大厚度为0.1mm～0.4mm。
第二方面，本申请实施例还提供了一种盖板制备方法，所述盖板具有中心区域、位于所述中心区域至少部分周侧的边缘区域，包括：通过第一模具注塑形成可塑性主体；通过热熔方式将第一稳固膜层复合于所述可塑性主体的外侧表面，其中，所述可塑性主体和所述第一稳固膜层中的至少一者的厚度由所述中心区域至所述边缘区域逐渐减小。
可选地，在所述通过热熔方式将第一稳固膜层复合于所述可塑性主体的外侧表面的步骤后还包括：对所述第一稳固膜层背离所述可塑性主体的表面进行硬化涂布处理。
第三方面，本申请实施例还提供了一种显示装置，包括：盖板，为上述实施例中的用于显示屏的盖板；显示屏，所述盖板设于所述显示屏的出光侧。
与现有技术相比，本申请实施例中的用于显示屏的盖板，盖板包括中心区域、位于中心区域至少部分周侧的边缘区域，盖板的厚度由中心区域至边缘区域逐渐减小，从而使得盖板与外界接触的外表面为相对于盖板与物体盖合的内表面呈现为向外凸出的弧形表面，即呈现为中央较厚、周侧较薄的凸透镜。根据凸透镜的成像原理，具体可以使可塑性主体和第一稳固膜层中的至少一者的厚度在盖板的厚度方向上由中心区域至边缘区域逐渐减小。另外通过设置第一稳固膜层能够提高盖板的硬度以及尺寸稳定性。本申请实施例所提供的盖板具有高硬度和尺寸稳定性，且具有镜面放大效果，增大了视角，提高了显示屏内的显示器件的显示效果。
附图说明
图1是根据本申请一实施例的盖板的结构示意图；
图2是图1一实施例中的沿B-B方向的剖视图；
图3是根据本申请另一实施例的盖板的结构示意图；
图4是图1另一实施例中的沿B-B方向的剖视图；
图5是根据本申请一实施例的盖板制备方法的流程图；
图6是本申请一实施例中的可塑性主体的制备示意图；
图7是本申请一实施例中的将第一稳固膜层覆盖于可塑性主体外侧表面的制备示意图；
图8是本申请一实施例中的盖板的制备示意图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本申请的全面理解。但是，对于本领域技术人员来说很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。
为了更好地理解本申请，下面结合图1至图8根据本申请实施例的用于显示屏的盖板、盖板制备方法及显示装置进行详细描述。
请参阅图1至图8，本申请实施例提供了一种用于显示屏的盖板100，盖板100包括中心区域AA、位于中心区域AA至少部分周侧的边缘区域PA，盖板100的厚度由中心区域AA至边缘区域PA逐渐减小，盖板100包括层叠设置的可塑性主体1和至少一层第一稳固膜层2；可塑性主体1和第一稳固膜层2中的至少一者的厚度由中心区域AA至边缘区域PA逐渐减小。
本申请实施例中的用于显示屏的盖板100，盖板100包括中心区域AA、位于中心区域AA至少部分周侧的边缘区域PA，盖板100的厚度由中心区域AA至边缘区域PA逐渐减小，从而使得盖板100与外界接触的外表面为相对于盖板100与物体盖合的内表面呈现为向外凸出的弧形表面，即呈现为中央较厚、周侧较薄的凸透镜。根据凸透镜的成像原理，具体可以使可 塑性主体1和第一稳固膜层2中的至少一者的厚度在盖板100的厚度方向上由中心区域AA至边缘区域PA逐渐减小。另外通过设置第一稳固膜层2能够提高盖板100的硬度以及尺寸稳定性。本申请实施例所提供的盖板100具有高硬度和尺寸稳定性，且具有镜面放大效果，增大了视角，提高了显示屏内的显示器件的显示效果。
本申请实施例中的用于显示屏的盖板100，盖板100包括中心区域AA、位于中心区域AA至少部分周侧的边缘区域PA，至少部分周侧的边缘区域PA可以如图1中位于中心区域两侧的边缘区域，也可以是如图3位于中心区域周测的边缘区域。
为了保证盖板100的硬度和尺寸稳定性，盖板100包括层叠设置的可塑性主体1和至少一层第一稳固膜层2。可塑性主体1包括相背的内侧表面11和外侧表面12，可塑性主体1的内侧表面11盖合于物体，第一稳固膜层2至少部分覆盖于可塑性主体1的外侧表面12设置，即形成以可塑性主体1为内表面、第一稳固膜层2为外表面的盖板100。通过将盖板100的内表面设置为尺寸稳定性好的可塑性主体1，将盖板100的外表面设置为硬度高的第一稳固膜层2，使得盖板100能够同时兼具良好的尺寸稳定性和硬度，以满足穿戴式装置的使用需求。根据实际对于盖板100的硬度需求，第一稳固膜层2可以设置一层或者多层。
为使盖板100的厚度由中心区域AA至边缘区域PA逐渐减小，可使可塑性主体1和第一稳固膜层2中的至少一者的厚度在盖板100的厚度方向上由中心区域AA至边缘区域PA逐渐减小，从而使得层叠设置的可塑性主体1和第一稳固膜层2的整体膜厚由中心区域AA至边缘区域PA逐渐减小。
其中，可塑性主体1和第一稳固膜层2中的至少一者的厚度在盖板100的厚度方向上由中心区域AA至边缘区域PA逐渐减小是指，一方面，可使可塑性主体1和第一稳固膜层2的厚度均由中心区域AA至边缘区域PA逐渐减小。
另一方面，也可使可塑性主体1和第一稳固膜层2中的一者的厚度由中心区域AA至边缘区域PA逐渐减小，另一者为具有相等厚度的结构。具体的，塑性主体1的厚度由中心区域AA至边缘区域PA逐渐减小、至少一层所述第一稳固膜层2具有相等厚度；若至少一层所述第一稳固膜层为多 层时，多层所述第一稳固膜层中的每一层为具有相等厚度的结构。或者，塑性主体1为相等厚度，至少一层所述第一稳固膜层2的厚度由中心区域AA至边缘区域PA逐渐减小具有相等厚度；若至少一层所述第一稳固膜层为多层时，多层所述第一稳固膜层中远离所述可塑性主体的膜层的厚度由所述中心区域至所述边缘区域逐渐减小，多层所述第一稳固膜层中靠近所述可塑性主体的膜层为相等厚度的结构。其他第一稳固膜层为相等厚度的膜层。优选以多层中与塑性主体接触的第一稳固膜层为厚度相等的膜层。
请参阅图1和图2，为便于描述，以可塑性主体1的厚度由中心区域AA至边缘区域PA逐渐减小、第一稳固膜层2具有相等厚度为例进行说明。将可塑性主体1沿横向的延伸方向定义为第一方向X，沿纵向的延伸方向定义为第二方向Y，则可塑性主体1的中心区域AA为以可塑性主体1沿第一方向X的中心线为基准，沿第二方向Y扩展的部分区域，而边缘区域PA则为与中心区域AA相接的两侧区域。需要说明的是，盖板100以及盖板100的可塑性主体1和第一稳固膜层2的厚度具体是指可塑性主体1和第一稳固膜层2沿垂直于第一方向X的方向上的长度。
需要说明的是，可塑性主体1的厚度由中心区域AA至边缘区域PA逐渐减小，即形成外侧表面12为相对于内侧表面11向外凸出的弧形表面，其表面以可塑性主体1沿第一方向X的中心线为基准，沿第二方向Y可塑性主体1由中心区域AA至边缘区域PA逐渐减小且呈弧形过渡，即呈现为中央较厚、两侧较薄的凸透镜。因此，当使用者从可塑性主体1的外侧表面12向内侧表面11注视显示屏时，根据光的折射原理，凸透镜将会放大显示屏内的显示器件，从而使得盖板100具有增大视角的效果。
根据凸透镜的成像原理，盖板100中心区域AA的厚度以及中心区域AA与显示屏内器件间的距离将影响盖板100的镜面放大比例，因此可通过调整盖板100的内表面和外表面的尺寸结构，来提高显示屏的显示效果。
请参阅图1和图2，盖板100与物体盖合的内表面为沿第一轨迹以第一曲率弯曲的曲面，盖板100与外界接触的外侧表面12为沿第二轨迹以第二曲率弯曲的曲面；在垂直于盖板方向的垂线与外表面相交的点处的第二曲率大于或等于在垂直于盖板方向的垂线与外表面相交的点处的第一曲率。其中，内表面在纵截面内沿第一方向X的曲线曲率为第一曲率，外表面在纵截面内沿第一方向X的曲线曲率为第二曲率。考虑到现有的穿戴式设备 外轮廓往往设置为曲面，因此可通过将盖板100的外表面设置为曲面来适用于多种显示屏。
根据光的折射原理，为了保证盖板100内显示器件的真实成像，可将在垂直于盖板方向的垂线与外表面相交的点处的第二曲率大于或等于在垂直于盖板方向的垂线与外表面相交的点处的第一曲率，以保证光线在内表面和外表面间折射后成像不失真。而第二曲率和第一曲率的具体数值和两者间的差值可根据实际情况调整，在此不作具体限定。此外，为便于盖板100的制作，也可使盖板的内表面为平面，外表面沿第一方向X延伸的轨迹以第二曲率弯曲的曲面，即形成平凸镜。具体是指，外表面为相对于内表面向远离内表面的方向凸出的外凸曲面，以形成平凸镜或凸透镜。平凸镜相比于凸透镜，其对显示屏内器件的保护更为可靠，同时也便于应用在穿戴式设备中。
可以理解的是，当第一稳固膜层2的厚度为相等厚度时，可将可塑性主体1的内侧表面11设置为沿第一轨迹以第一曲率弯曲的曲面或平面，且将外侧表面12设置为沿第二轨迹以第二曲率弯曲的曲面，来实现盖板100内表面和外表面的曲率调整。
请参阅图1和图3，具体的，在沿垂直于第一方向X的截面内，即盖板的厚度方向所在的截面内，盖板的横截面呈中间厚两边薄的弓形面。弓形面的两侧表面的弧度具体由可塑性主体1和第一稳固膜层2的表面弧度决定。其中，盖板100的具体形状可根据显示装置的需求调整，保证其厚度由中心区域AA至边缘PA区域逐渐减小即可，其具体形状在此不作具体限定。具体的，盖板100的外轮廓线可以是直线，也可以是曲线，即在盖板的横截面呈中间厚两边薄的弓形面时，盖板100在水平面内的正投影可以呈矩形、椭圆形、圆形、类椭圆形、类圆形中任一种。通过调整盖板100的形状，可将盖板100应用于不同尺寸形状的显示屏上，以适应不同类型显示装置的需要。
本申请实施例中，可塑性主体1的中心区域AA的最大厚度为1.2mm～1.7mm，可塑性主体1的边缘区域PA的最小厚度为0.6mm～1.2mm。一方面为保证盖板100的放大成像效果，中心区域AA的厚度应大于边缘区域PA的厚度，另一方面为保证盖板100的整体硬度和尺寸稳定性，边缘区域PA的最小厚度也不应过薄。因此，其中心区域AA和边缘区域PA 的厚度可根据实际情况调整，即满足设计要求同时保证中心区域AA和边缘区域PA平滑过渡即可。
进一步的，在可塑性主体1的外侧表面12一侧设置的第一稳固膜层2的最大厚度小于可塑性主体1的最大厚度。通过控制第一稳固膜层2的厚度，可便于实现盖板100的超薄化，同时能够避免第一稳固膜层2过厚而影响显示器件的显示效果。可选的，第一稳固膜层2的最大厚度为0.1mm～0.4mm，能够有效保证盖板100的整体硬度和尺寸稳定性。
请参阅图1和图2，为了提高盖板100的硬度和稳定性，盖板还包括硬化涂层3，硬化涂层3设于第一稳固膜层2背离可塑性主体1一侧。通过对盖板100背离显示屏内显示器件的一侧进行硬涂处理形成硬化涂层3，能够进一步增强盖板100的硬度，保证了显示器件的安全性，提高显示屏的使用寿命。
请参阅图4，为了进一步提高盖板的硬度和稳定性，盖板100还包括第二稳固膜层8，第二稳固膜层8覆盖于可塑性主体1的内侧表面11设置。第二稳固膜层8可设置为与第一稳固膜层2相同的材料，即在可塑性主体1的内外侧均设置稳固膜层。通过在可塑性主体1的内侧表面11设置第二稳固膜层8，保证了可塑性主体1内侧的安全性，避免显示屏内显示器件移动而磕碰损伤可塑性主体1的内侧表面11。
本申请实施例中，为了确保盖板100的硬度符合要求，设有硬化涂层3的第一稳固膜层2的硬度h1与第一稳固膜层2的硬度h2与可塑性主体1的硬度h3满足关系：h1＞h2＞h3，即确保在可塑性主体1上覆盖第一稳固膜层2后，能够增强盖板100的硬度。
需要说明的是，设有硬化涂层3的第一稳固膜层2具体是指通过设置硬化涂层3进行硬化处理后的第一稳固膜层2，硬化处理后的第一稳固膜层2具有较高的硬度。
可选的，设有硬化涂层3的第一稳固膜层2的硬度h1≥莫氏硬度6H，可将可塑性主体1的材料设置为聚碳酸酯(PC)，PC材质具有一定的透光性，也兼顾一定的柔性，利用有机材料的柔性特性可以提高盖板的可弯折性，使得在外力冲击下可塑性主体1也可以通过形变释放部分外力，以降低外力对盖板100的冲击。第一稳固膜层2包括聚酰亚胺层(PI)、聚乙烯层(PE)和聚甲基丙烯酸甲酯层(PMMA)中的一种或多种，PMMA材 料具有高透明度。因此，通过将由尺寸稳定性高、韧性好的PC材料制成的可塑性主体1设置为盖板100的内层、将由硬度大的PMMA材料制成的第一稳固膜层2设置为盖板100的外层，即可使盖板100兼具尺寸稳定性高、硬度大等优点，以满足穿戴式设备的使用，增加使用寿命。
此外，硬化涂层3可以设置为硬涂(Hard Coat，HC)膜，HC膜为由固化硬涂材料而成的膜状材料或膜基材的两面经过硬涂处理的膜。通过对第一稳固膜层2背离可塑性主体1的一侧进行HC喷淋涂布处理，可以显著增加盖板100的硬度，使盖板100的表面硬度稳定至莫氏硬度6H以上。
请参阅图5至图8，本申请还提供了一种盖板制备方法，盖板100具有中心区域AA、位于中心区域AA至少部分周侧的边缘区域PA，盖板制备方法包括：
S110：通过第一模具4注塑形成可塑性主体1；
S120：通过热熔方式将第一稳固膜层2复合于可塑性主体1的外侧表面12，其中，可塑性主体1和第一稳固膜层2中的至少一者的厚度由中心区域AA至边缘区域PA逐渐减小。
请参阅图6，在步骤S110中，第一模具4包括第一凹槽41，第一凹槽41与可塑性主体1形状尺寸相对应，可塑性主体1可通过第一模具4注塑成型。第一凹槽41的凹陷程度从中心区域AA至边缘区域PA逐渐减小，使得注塑成型的可塑性主体1的厚度由中心区域AA至边缘区域PA逐渐减小，以实现镜面放大的显示效果。其中，注塑材料可选用PC材质，以在提高透光率的前提下，保证良好的尺寸稳定性和韧性。
请参阅图7，在步骤S120中，通过热熔方式在可塑性主体1的外侧表面12上复合第一稳固膜层2，以使盖板100同时兼具良好的尺寸稳定性和强韧性，为保证第一稳固膜层2能够稳固设置于可塑性主体1的外侧表面12，可上下设置第二模具5和第三模具6，通过将可塑性主体1和第一稳固膜层2层叠放置于第二模具5和第三模具6之间，且第一稳固膜层2设置于可塑性主体1的外侧表面12，并通过热熔方式压紧第二模具5和第三模具6，即可实现将第一稳固膜层2稳固复合于可塑性主体1的外侧表面12上。
具体的，由于可塑性主体1的内侧表面11为第一曲率弯曲的曲面，外侧表面12为第二曲率弯曲的曲面，因此可设置以第一曲率凸出的第二模具 5，以及第二曲率凹陷的第三模具6，通过将第二模具5的凸出部抵接于可塑性主体1的内侧表面11，并将第三模具6的凹陷部抵接于第一稳固膜层2的外表面，通过压紧第二模具5和第三模具6，即可实现将第一稳固膜层2稳固复合于可塑性主体1的外侧表面12上。
进一步的，在步骤S120后，还可以对第一稳固膜层2背离可塑性主体1的表面进行HC涂布处理，其中HC涂层可采用纳米硬涂料固化而成，具体是通过微凹涂布辊或喷淋方式将纳米硬涂料涂覆在第一稳固膜层2背离可塑性主体1的表面上，待固化成膜后即可形成硬化涂层3，以进一步提高盖板100的硬度。
请参阅图8，在对第一稳固膜层2背离可塑性主体1的表面进行HC涂布处理后，在第四模具7上通过计算机数控(Computerized Numerical Control，CNC)加工去除多余材料，最终实现盖板100的成型。为保证第一稳固膜层2能够完全覆盖可塑性主体1的外侧表面12，第一稳固膜层2的面积往往大于可塑性主体1的外侧表面12，因此在将第一稳固膜层2复合于可塑性主体1后，往往需要切除其多余材料。此外，也可修整盖板100边角的形状，以实现最终的盖板100成型
本申请实施例还提供了一种显示装置，包括盖板100和显示屏，盖板为上述实施例中的用于显示屏的盖板100，盖板100设于显示屏的出光侧。一方面保证了显示屏内的各器件的安全性，另一方面能够对显示屏内的显示器件起到镜面放大的作用，增大了视角。
本申请实施例提供的显示装置具有上述任一实施例中用于显示屏的盖板的技术方案所具有的技术效果，与上述实施例相同或相应的结构以及术语的解释在此不再赘述。本申请实施例提供的显示装置可以为穿戴式装置，也可以为任何具有显示功能的电子产品，包括但不限于以下类别：电视机、笔记本电脑、桌上型显示器、平板电脑、数码相机、智能手环、智能眼镜、车载显示器、医疗设备、工控设备、触摸交互终端等，本申请实施例对此不作特殊限定。
以上，仅为本申请的具体实施方式，所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、模块和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。应理解，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，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。
还需要说明的是，本申请中提及的示例性实施例，基于一系列的步骤或者装置描述一些方法或系统。但是，本申请不局限于上述步骤的顺序，也就是说，可以按照实施例中提及的顺序执行步骤，也可以不同于实施例中的顺序，或者若干步骤同时执行。

Claims (18)

  1. 一种用于显示屏的盖板，所述盖板包括中心区域、位于所述中心区域至少部分周侧的边缘区域，所述盖板的厚度由所述中心区域至所述边缘区域逐渐减小；
    所述盖板包括层叠设置的可塑性主体和至少一层第一稳固膜层；
    所述可塑性主体和第一稳固膜层中的至少一者的厚度由所述中心区域至所述边缘区域逐渐减小。
  2. 根据权利要求1所述的用于显示屏的盖板，其中，所述可塑性主体和所述至少一层第一稳固膜层中的一者的厚度由所述中心区域至所述边缘区域逐渐减小，另一者为具有相等厚度的结构。
  3. 根据权利要求2所述的用于显示屏的盖板，其中，所述可塑性主体的厚度由所述中心区域至所述边缘区域逐渐减小，所述至少一层第一稳固膜层为具有相等厚度的结构。
  4. 根据权利要求3所述的用于显示屏的盖板，其中，至少一层所述第一稳固膜层为多层，多层所述第一稳固膜层中的每一层为具有相等厚度的结构。
  5. 根据权利要求2所述的用于显示屏的盖板，其中，所述可塑性主体为相等厚度的结构，所述至少一层第一稳固膜层的厚度由所述中心区域至所述边缘区域逐渐减小，并且所述至少一层第一稳固膜层为多层，多层所述第一稳固膜层中远离所述可塑性主体的膜层的厚度由所述中心区域至所述边缘区域逐渐减小，多层所述第一稳固膜层中靠近所述可塑性主体的膜层为相等厚度的结构。
  6. 根据权利要求1或2所述的用于显示屏的盖板，其中，所述盖板与物体盖合的内表面为沿第一轨迹以第一曲率弯曲的曲面，所述盖板与外界接触的外表面为沿第二轨迹为以第二曲率弯曲的曲面；在垂直于盖板方向的垂线与外表面相交的交点处的第二曲率大于或等于在垂直于盖板方向的垂线与外表面相交的交点处的第一曲率。
  7. 根据权利要求1或2所述的用于显示屏的盖板，其中，所述盖板与物 体盖合的内表面为平面，所述盖板与外界接触的外表面为沿第二轨迹以第二曲率弯曲的曲面。
  8. 根据权利要求6所述的用于显示屏的盖板，其中，在沿垂直于第一方向的截面内，所述盖板的横断面呈中间厚两边薄的弓形面。
  9. 根据权利要求8所述的用于显示屏的盖板，其中，所述盖板在水平面内的正投影呈矩形、椭圆形、圆形、类椭圆形、类圆形中的一种。
  10. 根据权利要求1或2所述的用于显示屏的盖板，其中，所述可塑性主体的所述中心区域的最大厚度为1.2mm～1.7mm，所述可塑性主体的所述边缘区域的最小厚度为0.6mm～1.2mm。
  11. 根据权利要求1或2所述的用于显示屏的盖板，还包括硬化涂层，所述硬化涂层设于所述第一稳固膜层背离所述可塑性主体一侧。
  12. 根据权利要求6所述的用于显示屏的盖板，其中，设有所述硬化涂层的所述第一稳固膜层的硬度h1与所述第一稳固膜层的硬度h2与所述可塑性主体的硬度h3满足关系：h1＞h2＞h3。
  13. 根据权利要求7所述的用于显示屏的盖板，其中，设有所述硬化涂层的所述第一稳固膜层的硬度h1≥莫氏硬度6H。
  14. 根据权利要求1所述的用于显示屏的盖板，其中，所述第一稳固膜层的最大厚度小于所述可塑性主体的最大厚度。
  15. 根据权利要求14所述的用于显示屏的盖板，其中，所述第一稳固膜层的最大厚度为0.1mm～0.4mm。
  16. 一种盖板制备方法，所述盖板具有中心区域、位于所述中心区域至少部分周侧的边缘区域，包括：
    通过第一模具注塑形成可塑性主体；
    通过热熔方式将第一稳固膜层复合于所述可塑性主体的外侧表面，其中，所述可塑性主体和所述第一稳固膜层中的至少一者的厚度由所述中心区域至所述边缘区域逐渐减小。
  17. 根据权利要求16所述的盖板制备方法，在所述通过热熔方式将第一稳固膜层复合于所述可塑性主体的外侧表面的步骤后还包括：
    对所述第一稳固膜层背离所述可塑性主体的表面进行硬化涂布处理。
  18. 一种显示装置，包括：
    权利要求1至15任一项所述的用于显示屏的盖板；
    显示屏，所述盖板设于所述显示屏的出光侧。
PCT/CN2021/137873 2021-05-31 2021-12-14 用于显示屏的盖板、盖板制备方法及显示装置 WO2022252560A1 (zh)

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CN205142299U (zh) * 2015-10-28 2016-04-06 东莞酷派软件技术有限公司 一种显示屏盖板
CN107861570A (zh) * 2017-11-20 2018-03-30 广东欧珀移动通信有限公司 显示组件及移动终端
CN108111646A (zh) * 2017-12-19 2018-06-01 广东欧珀移动通信有限公司 面盖组件、显示模组和移动终端
JP2019049640A (ja) * 2017-09-11 2019-03-28 アルパイン株式会社 表示装置用のカバー板の製造方法、および前記カバー板を使用した表示装置の製造方法
CN111508343A (zh) * 2020-05-29 2020-08-07 武汉天马微电子有限公司 一种显示面板和显示装置
CN112689816A (zh) * 2019-08-19 2021-04-20 京东方科技集团股份有限公司 柔性显示装置及其制作方法

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CN204990246U (zh) * 2015-09-24 2016-01-20 广东欧珀移动通信有限公司 一种2.5d盖板玻璃及电子显示屏
CN205142299U (zh) * 2015-10-28 2016-04-06 东莞酷派软件技术有限公司 一种显示屏盖板
JP2019049640A (ja) * 2017-09-11 2019-03-28 アルパイン株式会社 表示装置用のカバー板の製造方法、および前記カバー板を使用した表示装置の製造方法
CN107861570A (zh) * 2017-11-20 2018-03-30 广东欧珀移动通信有限公司 显示组件及移动终端
CN108111646A (zh) * 2017-12-19 2018-06-01 广东欧珀移动通信有限公司 面盖组件、显示模组和移动终端
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