WO2021212632A1 - 曲面屏保护膜及曲面盖板 - Google Patents

曲面屏保护膜及曲面盖板 Download PDF

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Publication number
WO2021212632A1
WO2021212632A1 PCT/CN2020/096181 CN2020096181W WO2021212632A1 WO 2021212632 A1 WO2021212632 A1 WO 2021212632A1 CN 2020096181 W CN2020096181 W CN 2020096181W WO 2021212632 A1 WO2021212632 A1 WO 2021212632A1
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WO
WIPO (PCT)
Prior art keywords
protective film
screen protective
curved
curved screen
recessed portion
Prior art date
Application number
PCT/CN2020/096181
Other languages
English (en)
French (fr)
Inventor
周浩
Original Assignee
武汉华星光电半导体显示技术有限公司
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Publication of WO2021212632A1 publication Critical patent/WO2021212632A1/zh

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a general shape other than plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products 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 form; Layered products 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
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products 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 formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • 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
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2483/00—Presence of polysiloxane

Definitions

  • This application relates to the field of display technology, in particular to a curved screen protective film and a curved cover plate.
  • the embodiments of the present application provide a curved screen protective film and a curved cover plate, which can improve the problem that when the curved screen protective film is attached to the curved screen or the curved cover plate, the edge of the curved screen protective film tends to lift up and generate air bubbles.
  • the embodiment of the present application provides a curved screen protective film, which includes a flat area and at least one curved area located outside the flat area.
  • the curved screen protective film corresponds to each The portion of the bending area has at least one recess.
  • a portion of the curved screen protective film corresponding to each of the curved areas has a plurality of the recesses.
  • the depths of the plurality of recesses are equal; and the plurality of recesses are distributed at equal intervals.
  • the depth of at least part of the recesses increases from close to the plane area to farther from the plane area.
  • the plurality of recessed portions include a first recessed portion, a second recessed portion, and a third recessed portion;
  • the first recessed portion is arranged away from the plane area
  • the third recessed portion is arranged close to the plane area
  • the second recessed portion is located between the first recessed portion and the third recessed portion;
  • the depth of the first recessed portion is greater than the depth of the second recessed portion, and the depth of the second recessed portion is equal to the depth of the third recessed portion.
  • the depth of the first concave portion is equal to 0.8 times the thickness of the curved screen protective film, and the depth of the second concave portion and the third concave portion is equal to that of the curved screen 0.5 times the thickness of the protective film.
  • the width of the first recessed portion from the second recessed portion is smaller than the width of the second recessed portion from the third recessed portion.
  • the width of the second recessed portion from the third recessed portion is equal to 1.1 to 2 times the width of the first recessed portion from the second recessed portion.
  • the concave portion is provided at the junction of the curved area and the flat area.
  • the depth of the recess is equal to 0.8 times the thickness of the curved screen protective film.
  • the depth of the recess is smaller than the thickness of the curved screen protective film.
  • the thickness of the curved screen protective film is greater than or equal to 0.01 mm and less than or equal to 0.04 mm.
  • the difference between the depth of the recess and the thickness of the curved screen protective film is greater than or equal to 0.005 mm.
  • the curved screen protective film is provided with an adhesive layer on a surface opposite to the surface where the recessed portion is provided.
  • the thickness of the adhesive layer is less than the thickness of the curved screen protective film.
  • the thickness of the adhesive layer is 0.02 mm.
  • the depth of the recess is equal to half of the sum of the thickness of the curved screen protective film and the adhesion layer.
  • the longitudinal section of the recessed portion is at least one of a rectangular shape, an arc shape or a stepped shape.
  • An embodiment of the present application also provides a curved cover, the curved cover includes a curved screen protective film, the curved screen protective film includes a flat area and at least one curved area located outside the flat area, the curved screen protector When the film is in a flat state, the curved screen protective film has at least one recessed portion corresponding to each bending area.
  • An embodiment of the present application also provides a display panel, the display panel includes a curved screen protective film, the curved screen protective film includes a flat area and at least one curved area located outside the flat area, the curved screen protective film is located In the flat state, the curved screen protective film has at least one recessed portion corresponding to each curved area.
  • the curved screen protective film and the curved cover provided by the embodiments of the present application include a flat area and at least one curved area located outside the flat area.
  • the curved screen protective film When in the flattened state, the curved screen protective film has at least one recessed portion corresponding to each of the curved areas, so as to improve the bending performance of the curved screen protective film and improve the adhesion of the curved screen protective film to the curved surface
  • the edge of the curved screen protective film is easy to lift up, causing the problem of air bubbles.
  • FIG. 1A is a schematic structural diagram of a curved screen protective film in a flattened state according to the first embodiment of the application;
  • Fig. 1B is a top view of the curved screen protective film shown in Fig. 1A;
  • Fig. 1C is a schematic structural diagram of the curved screen protective film shown in Fig. 1A in a bent state;
  • FIG. 2 is a schematic diagram of the structure of the curved screen protective film in the flattened state according to the second embodiment of the application;
  • FIG. 3 is a schematic diagram of the structure of the curved screen protective film in the flattened state according to the third embodiment of the application;
  • 4A is a schematic diagram of the structure of the curved screen protective film in a flattened state according to the fourth embodiment of the application;
  • FIG. 4B is a top view of the curved screen protective film shown in FIG. 4A;
  • FIG. 5 is a schematic diagram of the structure of the curved screen protective film in the flattened state according to the fifth embodiment of the application;
  • 6A is a schematic diagram of the structure of the curved screen protective film in the flattened state according to the sixth embodiment of the application;
  • Fig. 6B is a schematic structural diagram of the curved screen protective film shown in Fig. 6A in a bent state;
  • FIG. 7 is a schematic structural diagram of a curved cover provided by an embodiment of the application.
  • FIG. 1A is a schematic structural diagram of the curved screen protective film of the first embodiment of the application in a flat state
  • FIG. 1B which is a top view of the curved screen protective film shown in FIG. 1A
  • the curved screen protection film 100 includes a flat area 100a and at least one curved area 100b located outside the flat area 100a.
  • the curved screen protection film 100 corresponds to each of the A portion of the bending area 100b has at least one recess 101.
  • the recessed portion 101 is enclosed by a bottom wall 101a and inner side walls 101b and outer side walls 101c located on opposite sides of the bottom wall 101a.
  • the plane area 100a and the bending area 100b are parallel to the x-axis; the inner side wall 101b and the outer side wall 101c are parallel to the y-axis.
  • FIG. 1C is a schematic structural diagram of the curved screen protection film shown in FIG.
  • the curved area 100b has flexibility, and the curved area 100b is curved to form an arc with a radius of curvature r; the radius of curvature r may vary depending on the application of the curved screen protective film 100.
  • the recessed portion 101 can reduce the bending stress of the curved area 100b, and avoid the problem that the curved area 100b is prone to warp and generate air bubbles when the curved screen protective film 100 is attached to the curved screen.
  • the longitudinal section of the recessed portion 101 is at least one of a rectangular shape, an arc shape, or a stepped shape. Specifically, it can be set according to different curvatures of the bending area 100b when bending, so that the bending area 100b has a better bending performance.
  • the bending performance That is, when the bending area 100b is bent, the smaller the curvature, the smaller the degree of bending when the bending area 100b is bent, and the longitudinal section of the recessed portion 101 is either a rectangle or an arc; When the region 100b is bent, the curvature is greater, and the bending degree of the bending region 100b is greater when the bending region 100b is bent.
  • the longitudinal section of the concave portion 101 is stepped to reduce the influence of bending stress on the bending region 100b.
  • the preparation material of the curved screen protective film 100 is polyethylene terephthalate.
  • the curved screen protective film 100 is provided with an adhesive layer 102 on the surface opposite to the surface where the recess 101 is provided.
  • the adhesive layer 102 is made of silica gel, and the thickness of the adhesive layer 102 is less than The thickness of the curved screen protective film 100; specifically, the adhesive layer 102 is 0.02 mm.
  • the depth of the concave portion 101 is less than the thickness of the curved screen protective film 100.
  • the thickness of the curved screen protective film 100 is greater than or equal to 0.01 mm and less than or equal to 0.04 mm.
  • the depth of the concave portion 101 The thickness difference with the curved screen protective film 100 is greater than or equal to 0.005 mm; further, the depth of the recess 101 is equal to half of the sum of the thickness of the curved screen protective film 100 and the adhesion layer 102; further Ground, the depth of the recess 101 is equal to 0.025 mm.
  • the curved screen protective film 100 has a plurality of recesses 101 in a portion corresponding to each of the curved areas 100b, and at least part of the recesses 101 have a depth ranging from close to the flat area 100a to far away from the flat area 100a.
  • the plane area 100a is incremented.
  • FIG. 2 is a schematic structural diagram of the curved screen protective film in a flattened state according to the second embodiment of this application;
  • the recessed portion 101 includes a first recessed portion 1011, a second recessed portion 1012, and a third recessed portion 1013;
  • the first recessed portion 1011 is located away from the plane area 100a;
  • the third recessed portion 1013 is disposed close to the plane area 100a;
  • the second recessed portion 1012 is located between the first recessed portion 1011 and the third recessed portion 1013;
  • the depth of the first recessed portion 1011 is greater than the depth of the second recessed portion 1012, and the depth of the second recessed portion 1012 is equal to the depth of the third recessed portion 1013, so as to be in a curved state in the curved region 100b At this time, the influence of tensile stress on the bending area 100b is reduced in the bending area 100b far away from the plane area 100a.
  • the depth of the first recessed portion 1011 is equal to 0.8 times the thickness of the curved screen protective film 100
  • the depth of the second recessed portion 1012 and the third recessed portion 1013 is equal to the curved screen protective film 100 0.5 times the thickness.
  • the first concave portion 1011, the second The distances between the two recessed portions 1012 and the third recessed portion 1013 are different.
  • the width a1 of the first recessed portion 1011 from the second recessed portion 1012 is smaller than the width a2 of the second recessed portion 1012 from the third recessed portion 1013, so as to reduce the effect of bending stress on the bending.
  • the width a2 of the second recessed portion 1012 from the third recessed portion is equal to 1.1 to 2 times the width a1 of the first recessed portion 1011 from the second recessed portion 1012.
  • FIG. 3 is a schematic structural diagram of a curved screen protective film in a flattened state according to the third embodiment of the application.
  • the third recessed portion 1013 may be provided with a plurality of recesses on the side close to the boundary of the curved area 100b, that is, the third recessed portion 1013 may be provided on the side close to the boundary of the curved area 100b.
  • a recess 1014 is also provided.
  • the depth of the second recessed portion 1012 may be greater than the depth of the third recessed portion 1013; specifically, the depth of the first recessed portion 1011 The depth is equal to 0.8 times the thickness of the curved screen protective film 100, the depth of the second concave portion 1012 is equal to 0.6 times the thickness of the curved screen protective film 100, and the depth of the third concave portion 1013 is equal to the thickness of the curved screen 0.4 times the thickness of the protective film 100.
  • FIG. 4A is a schematic structural diagram of the fourth curved screen protective film provided in an embodiment of the application in a flat state, as shown in FIG. 4B, which is a top view of the curved screen protective film shown in FIG. 4A;
  • the curved screen protective film 100 has a plurality of recesses 101 in a portion corresponding to each of the curved regions 100b, and the depths of the plurality of recesses 101 are equal; further, the distance between the plurality of recesses 101 In particular, the plurality of recesses 101 starts at a distance a from the junction of the flat area 100a and the curved area 100b, and maintains the direction a at the distance between each recess 101.
  • the boundary of the bending zone 100b is evenly distributed, and further, the distance a is equal to 1 mm.
  • FIG. 5 is a schematic structural diagram of the fifth curved screen protective film provided in an embodiment of the application in a flat state; because the junction of the curved area 100b and the flat area 100a is curved, it will also Therefore, in order to reduce the bending stress at the junction of the bending zone 100b and the plane zone 100a, the concave portion 1015 is provided at the junction of the bending zone 100b and the plane zone 100a.
  • the depth of the recessed portion 1015 is greater than or equal to the depth of the first recessed portion 1011 having the deepest depth in the curved area 100b; specifically, the depth of the recessed portion 1015 is equal to the curved screen protective film 100 0.8 times the thickness.
  • FIG. 6A is a schematic structural diagram of the sixth curved screen protective film provided in an embodiment of the application in a flat state
  • FIG. 6B which is the sixth curved screen protective film in FIG. 6A in a bent state Schematic diagram of the structure
  • the curved screen protective film 600 includes a flat area 603 and a curved area 604;
  • the bending area 604 includes a first bending area 6041 and a second bending area 6042;
  • the flat area 603 is located on opposite sides of the second curved area 6042, and the first curved area 6041 is located on the side of the flat area 603 away from the second curved area 6042;
  • the first bending area 6041 is provided with the recessed portion 6011, and the second bending area 6042 is provided with the recessed portion 6012 to reduce the bending stress when the bending area 604 is bent.
  • the depth and distribution density of the recessed portion 6012 are greater than the depth and distribution density of the recessed portion 6011.
  • the adhesion layer 602 is provided on a surface opposite to the surface of the recess 601.
  • FIG. 7 is a schematic structural diagram of a curved cover provided by an embodiment of the application.
  • the curved cover includes the curved screen protective film 700 and a cover body 703.
  • the cover body 703 includes a non-bending area 703a and at least one bending area 703b located outside the non-bending area 703a; the bending area 703b can be bent.
  • the flat area 700a of the curved screen protective film 700 is provided corresponding to the non-bending area 703a, and the curved area 700b of the curved screen protective film 700 is provided corresponding to the bending area 703b, so as to avoid the curved surface.
  • the screen protection film 700 is attached to the cover body 703, the curved screen protection film 700 is easy to lift up, causing air bubbles.
  • the curved screen protective film 700 is attached to the cover body 703 through the adhesive layer 702.
  • the material of the cover body 703 is glass.
  • the curved screen protective film 700 and the curved cover can be applied to a display panel; further, the display panel includes a liquid crystal display panel and a flexible display panel.
  • the curved screen protective film 700 and the curved cover can also be applied to display devices; the display devices include mobile terminals (such as mobile phones, notebook computers, etc.), non-mobile terminals (such as TVs, desktop computers, etc.). and many more.
  • the display devices include mobile terminals (such as mobile phones, notebook computers, etc.), non-mobile terminals (such as TVs, desktop computers, etc.). and many more.
  • the application also provides a display panel including the curved screen protective film.
  • the curved screen protective film and the curved cover provided by the embodiments of the present application, the curved screen protective film includes a flat area and at least one curved area located outside the flat area, when the curved screen protective film is in a flat state,
  • the curved screen protective film has at least one recessed portion corresponding to each curved area, so as to improve the bending performance of the curved screen protective film, and improve when the curved screen protective film is attached to the curved screen or the curved cover.
  • the edge of the curved screen protective film is easy to lift up, causing the problem of air bubbles.

Abstract

一种曲面屏保护膜（100）及曲面盖板，曲面屏保护膜（100）包括平面区（100a）及位于平面区（100a）外侧的至少一弯曲区（100b），曲面屏保护膜（100）处于展平态时，曲面屏保护膜（100）对应每个弯曲区（100b）的部分至少具有一凹陷部（101），以提高曲面屏保护膜（100）的弯曲性能，改善曲面屏保护膜（100）贴附在曲面屏或曲面盖板上时，曲面屏保护膜（100）边缘易翘起，产生气泡的问题。

Description

曲面屏保护膜及曲面盖板 技术领域
本申请涉及显示技术领域，尤其涉及一种曲面屏保护膜及曲面盖板。
 背景技术
随着技术的不断发展，在显示面板中越来越多的采用曲面显示屏设计以提升显示面板的屏占比，而异形显示面板以及弯曲显示面板也开始崭露头角，但由于显示屏边缘弯曲，传统的保护膜在贴附完成后，在一定的时间内就会容易出现保护膜边角翘起、产生气泡甚至边缘脱落等问题，导致保护膜不能对盖板起到很好的保护作用。
 技术问题
本申请实施例提供一种曲面屏保护膜及曲面盖板，可以改善曲面屏保护膜贴附在曲面屏或曲面盖板上时，曲面屏保护膜边缘易翘起，产生气泡的问题。
 技术解决方案
本申请实施例提供一种曲面屏保护膜，包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
在所述的曲面屏保护膜中，所述曲面屏保护膜对应每个所述弯曲区的部分具有多个所述凹陷部。
在所述的曲面屏保护膜中，多个所述凹陷部的深度相等；多个所述凹陷部等间隔分布。
在所述的曲面屏保护膜中，至少部分所述凹陷部的深度从靠近所述平面区至远离所述平面区递增。
在所述的曲面屏保护膜中，多个所述凹陷部包括第一凹陷部、第二凹陷部及第三凹陷部；
所述第一凹陷部远离所述平面区设置；
所述第三凹陷部靠近所述平面区设置；
所述第二凹陷部位于所述第一凹陷部与所述第三凹陷部之间；
所述第一凹陷部的深度大于所述第二凹陷部的深度，所述第二凹陷部的深度等于所述第三凹陷部的深度。
在所述的曲面屏保护膜中，所述第一凹陷部的深度等于所述曲面屏保护膜厚度的0.8倍，所述第二凹陷部和所述第三凹陷部的深度等于所述曲面屏保护膜厚度的0.5倍。
在所述的曲面屏保护膜中，所述第一凹陷部距所述第二凹陷部的宽度小于所述第二凹陷部距所述第三凹陷部的宽度。
在所述的曲面屏保护膜中，所述第二凹陷部距所述第三凹陷部的宽度等于所述第一凹陷部距所述第二凹陷部宽度的1.1倍~2倍。
在所述的曲面屏保护膜中，所述弯曲区与所述平面区的交接处设置有所述凹陷部。
在所述的曲面屏保护膜中，所述凹陷部的深度等于所述曲面屏保护膜厚度的0.8倍。
在所述的曲面屏保护膜中，所述凹陷部的深度小于所述曲面屏保护膜的厚度。
在所述的曲面屏保护膜中，所述曲面屏保护膜的厚度为大于或等于0.01毫米且小于或等于0.04毫米。
在所述的曲面屏保护膜中，所述凹陷部的深度与所述曲面屏保护膜的厚度之差大于或等于0.005毫米。
在所述的曲面屏保护膜，所述曲面屏保护膜在设置有所述凹陷部表面相对的一侧表面设置有粘附层。
在所述的曲面屏保护膜中，所述粘附层的厚度小于所述曲面屏保护膜的厚度。
在所述的曲面屏保护膜中，所述粘附层的厚度为0.02毫米。
在所述的曲面屏保护膜中，所述凹陷部的深度等于所述曲面屏保护膜与所述黏附层的厚度之和的一半。
在所述的曲面屏保护膜中，所述凹陷部的纵截面为矩形、弧形或阶梯形的至少一种。
本申请实施例还提供一种曲面盖板，所述曲面盖板包括曲面屏保护膜，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
本申请实施例还提供一种显示面板，所述显示面板包括曲面屏保护膜，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
 有益效果
相较于现有技术，本申请实施例提供的曲面屏保护膜及曲面盖板，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部，以提高所述曲面屏保护膜的弯曲性能，改善所述曲面屏保护膜贴附在曲面屏或曲面盖板上时，所述曲面屏保护膜边缘易翘起，产生气泡的问题。
 附图说明
图1A为本申请第一实施例曲面屏保护膜在展平状态下的结构示意图；
图1B为图1A所示的曲面屏保护膜的俯视图；
图1C为图1A所示的曲面屏保护膜在弯曲状态下结构示意图；
图2为本申请第二实施例曲面屏保护膜在展平状态下的结构示意图；
图3为本申请第三实施例曲面屏保护膜在展平状态下的结构示意图；
图4A为本申请第四实施例曲面屏保护膜在展平状态下的结构示意图；
图4B为图4A所示的曲面屏保护膜的俯视图；
图5为本申请第五实施例曲面屏保护膜在展平状态下的结构示意图；
图6A为本申请第六实施例曲面屏保护膜在展平状态下的结构示意图；
图6B为图6A所示的曲面屏保护膜在弯曲状态下的结构示意图；
图7为本申请实施例提供的曲面盖板的结构示意图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
具体的，请参阅图1A，其为本申请第一实施例曲面屏保护膜在展平状态下的结构示意图，如图1B所示，其为图1A所示的曲面屏保护膜的俯视图；所述曲面屏保护膜100包括平面区100a及位于所述平面区100a外侧的至少一弯曲区100b，所述曲面屏保护膜100处于展平态时，所述曲面屏保护膜100对应每个所述弯曲区100b的部分至少具有一凹陷部101。
所述凹陷部101由一底壁101a和位于所述底壁101a相对两侧的内侧壁101b和外侧壁101c围合而成。
在展平状态下，所述平面区100a及所述弯曲区100b与x轴相平行；所述内侧壁101b及所述外侧壁101c与y轴相平行。
请参阅图1C，其为图1A所示的曲面屏保护膜在弯曲状态下的结构示意图；在弯曲状态下，所述曲面屏保护膜100的所述平面区100a仍保持与x轴相平行，而所述弯曲区100b具有可弯曲性，所述弯曲区100b弯曲形成曲率半径为r的弧形；所述曲率半径r依据所述曲面屏保护膜100应用场合的不同会有所不同。所述凹陷部101可减小所述弯曲区100b的弯曲应力，避免所述曲面屏保护膜100在贴附至曲面屏上时，所述弯曲区100b易出现翘起产生气泡的问题。
所述凹陷部101的纵截面为矩形、弧形或阶梯形的至少一种，具体地可根据所述弯曲区100b弯曲时曲率的不同设置，以使所述弯曲区100b在弯曲时具有较好的弯曲性能。即在所述弯曲区100b弯曲时，曲率越小，所述弯曲区100b弯曲时的弯曲程度也越小，所述凹陷部101的纵截面为矩形、弧形的其中一种；若所述弯曲区100b弯曲时，曲率较大，所述弯曲区100b弯曲时的弯曲程度也越大，所述凹陷部101的纵截面为阶梯形，以减小弯曲应力对所述弯曲区100b的影响。
所述曲面屏保护膜100的制备材料为聚对苯二甲酸乙二醇酯。
所述曲面屏保护膜100在设置有所述凹陷部101表面相对的一侧表面设置有粘附层102，所述粘附层102的制备材料为硅胶，所述粘附层102的厚度小于所述曲面屏保护膜100的厚度；具体地，所述粘附层102为0.02毫米。
所述凹陷部101的深度小于所述曲面屏保护膜100的厚度，具体地，所述曲面屏保护膜100的厚度为大于或等于0.01毫米且小于或等于0.04毫米，所述凹陷部101的深度与所述曲面屏保护膜100的厚度差大于或等于0.005毫米；进一步地，所述凹陷部101的深度等于所述曲面屏保护膜100与所述黏附层102的厚度之和的一半；更进一步地，所述凹陷部101的深度等于0.025毫米。
在一些实施例中，所述曲面屏保护膜100对应每个所述弯曲区100b的部分具有多个所述凹陷部101，至少部分所述凹陷部101的深度从靠近所述平面区100a至远离所述平面区100a递增。
具体地，请参阅图2，其为本申请第二实施例曲面屏保护膜在展平状态下的结构示意图；
所述凹陷部101包括第一凹陷部1011、第二凹陷部1012及第三凹陷部1013；
所述第一凹陷部1011远离所述平面区100a设置；
所述第三凹陷部1013靠近所述平面区100a设置；
所述第二凹陷部1012位于所述第一凹陷部1011与所述第三凹陷部1013之间；
所述第一凹陷部1011的深度大于所述第二凹陷部1012的深度，所述第二凹陷部1012的深度等于所述第三凹陷部1013的深度，以在所述弯曲区100b处于弯曲状态时，在远离所述平面区100a的所述弯曲区100b内减小拉应力对所述弯曲区100b的影响。
具体地，所述第一凹陷部1011的深度等于所述曲面屏保护膜100厚度的0.8倍，所述第二凹陷部1012和所述第三凹陷部1013的深度等于所述曲面屏保护膜100厚度的0.5倍。
由于所述弯曲区100b在弯曲时处于所述弯曲区100b内的各点所受到的弯曲应力不同，为降低弯曲应力对所述弯曲区100b的影响，所述第一凹陷部1011、所述第二凹陷部1012以及所述第三凹陷部1013的间距不同。
具体地，所述第一凹陷部1011距所述第二凹陷部1012的宽度a1小于所述第二凹陷部1012距所述第三凹陷部1013的宽度a2，以减小弯曲应力对所述弯曲区100b的影响。具体地，所述第二凹陷部1012距所述第三凹陷部的宽度a2等于所述第一凹陷部1011距所述第二凹陷部1012宽度a1的1.1倍~2倍。
请参图3，其为本申请第三实施例曲面屏保护膜在展平状态下的结构示意图，所述第二凹陷部1012、所述第三凹陷部1013位于所述第一凹陷部1011的相对两侧，所述第三凹陷部1013靠近所述弯曲区100b的边界的一侧还可设置多个所述凹陷部，即所述第三凹陷部1013靠近所述弯曲区100b的边界一侧还设置有凹陷部1014。
由于所述第三凹陷部1013位于所述第二凹陷部1012外侧，所述第二凹陷部1012的深度可大于所述第三凹陷部1013的深度；具体地，所述第一凹陷部1011的深度等于所述曲面屏保护膜100厚度的0.8倍，所述第二凹陷部1012的深度等于所述曲面屏保护膜100厚度的0.6倍，所述第三凹陷部1013的深度等于所述曲面屏保护膜100厚度的0.4倍。
请参阅图4A，其为本申请实施例提供的第四种曲面屏保护膜在展平状态下的结构示意图，如图4B所示，其为图4A所示的曲面屏保护膜的俯视图；所述曲面屏保护膜100对应每个所述弯曲区100b的部分具有多个所述凹陷部101,多个所述凹陷部101的深度相等；进一步地，多个所述凹陷部101之间的距离相等，具体地，多个所述凹陷部101自距所述平面区100a与所述弯曲区100b的交接处的距离a处开始，以每个所述凹陷部101之间间隔距离保持a向所述弯曲区100b的边界处均匀分布，进一步地，所述距离a等于1mm。
请参阅图5，其为本申请实施例提供的第五种曲面屏保护膜在展平状态下的结构示意图；由于所述弯曲区100b与所述平面区100a的交界处在弯曲时，也会受到的弯曲应力，所以为减小所述弯曲区100b与所述平面区100a的交界处的弯曲应力，在所述弯曲区100b与所述平面区100a的交界处设置有所述凹陷部1015。
所述凹陷部1015的深度大于或等于位于所述弯曲区100b内的具有最深深度的所述第一凹陷部1011的深度；具体地，所述凹陷部1015的深度等于所述曲面屏保护膜100厚度的0.8倍。
请参阅图6A，其为本申请实施例提供的第六种曲面屏保护膜在展平状态下的结构示意图；如图6B，其为图6A中的第六种曲面屏保护膜在弯曲状态下的结构示意图；所述曲面屏保护膜600包括平面区603及弯曲区604；
所述弯曲区604包括第一弯曲区6041以及第二弯曲区6042；
所述平面区603位于所述第二弯曲区6042的相对两侧，所述第一弯曲区6041位于所述平面区603远离所述第二弯曲区6042的一侧；
所述第一弯曲区6041设置有所述凹陷部6011，所述第二弯曲区6042设置有所述凹陷部6012，以减小所述弯曲区604弯曲时的弯曲应力。
进一步地，所述凹陷部6012的深度及分布密度大于所述凹陷部6011的深度及分布密度。
所述粘附层602设置在与所述凹陷部601表面相对的一侧表面。
请参阅图7，其为本申请实施例提供的曲面盖板的结构示意图，所述曲面盖板包括所述曲面屏保护膜700及盖板本体703，所述盖板本体703包括非弯折区703a及位于所述非弯折区703a外侧的至少一弯折区703b；所述弯折区703b可弯折。
所述曲面屏保护膜700的所述平面区700a对应所述非弯折区703a设置，所述曲面屏保护膜700的所述弯曲区700b对应所述弯折区703b设置，以避免所述曲面屏保护膜700贴附在所述盖板本体703时，所述曲面屏保护膜700易翘起，产生气泡的问题。
所述曲面屏保护膜700通过所述黏附层702贴附在所述盖板本体703上。所述盖板本体703的制备材料为玻璃。
可以理解的，所述曲面屏保护膜700、所述曲面盖板可以应用于显示面板中；进一步地，所述显示面板包括液晶显示面板、柔性显示面板。
更进一步地，所述曲面屏保护膜700、所述曲面盖板还可以应用于显示装置中；所述显示装置包括移动终端(如手机、笔记本电脑等)、非移动终端(如电视、台式电脑等)等。
本申请还提供一种显示面板，所述显示面板包括所述的曲面屏保护膜。
本申请实施例提供的曲面屏保护膜及曲面盖板，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部，以提高所述曲面屏保护膜的弯曲性能，改善所述曲面屏保护膜贴附在曲面屏或曲面盖板上时，所述曲面屏保护膜边缘易翘起，产生气泡的问题。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种曲面屏保护膜及曲面盖板进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种曲面屏保护膜，其中，包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
  2. 根据权利要求1所述的曲面屏保护膜，其中，所述曲面屏保护膜对应每个所述弯曲区的部分具有多个所述凹陷部。
  3. 根据权利要求2所述的曲面屏保护膜，其中，多个所述凹陷部的深度相等；多个所述凹陷部等间隔分布。
  4. 根据权利要求2所述的曲面屏保护膜，其中，至少部分所述凹陷部的深度从靠近所述平面区至远离所述平面区递增。
  5. 根据权利要求4所述的曲面屏保护膜，其中，多个所述凹陷部包括第一凹陷部、第二凹陷部及第三凹陷部；
    所述第一凹陷部远离所述平面区设置；
    所述第三凹陷部靠近所述平面区设置；
    所述第二凹陷部位于所述第一凹陷部与所述第三凹陷部之间；
    所述第一凹陷部的深度大于所述第二凹陷部的深度，所述第二凹陷部的深度等于所述第三凹陷部的深度。
  6. 根据权利要求5所述的曲面屏保护膜，其中，所述第一凹陷部的深度等于所述曲面屏保护膜厚度的0.8倍，所述第二凹陷部和所述第三凹陷部的深度等于所述曲面屏保护膜厚度的0.5倍。
  7. 根据权利要求5所述的曲面屏保护膜，其中，所述第一凹陷部距所述第二凹陷部的宽度小于所述第二凹陷部距所述第三凹陷部的宽度。
  8. 根据权利要求7所述的曲面屏保护膜，其中，所述第二凹陷部距所述第三凹陷部的宽度等于所述第一凹陷部距所述第二凹陷部宽度的1.1倍~2倍。
  9. 根据权利要求1所述的曲面屏保护膜，其中，所述弯曲区与所述平面区的交接处设置有所述凹陷部。
  10. 根据权利要求9所述的曲面屏保护膜，其中，所述凹陷部的深度等于所述曲面屏保护膜厚度的0.8倍。
  11. 根据权利要求1所述的曲面屏保护膜，其中，所述凹陷部的深度小于所述曲面屏保护膜的厚度。
  12. 根据权利要求11所述的曲面屏保护膜，其中，所述曲面屏保护膜的厚度为大于或等于0.01毫米且小于或等于0.04毫米。
  13. 根据权利要求11所述的曲面屏保护膜，其中，所述凹陷部的深度与所述曲面屏保护膜的厚度之差大于或等于0.005毫米。
  14. 根据权利要求1所述的曲面屏保护膜，其中，所述曲面屏保护膜在设置有所述凹陷部表面相对的一侧表面设置有粘附层。
  15. 根据权利要求14所述的曲面屏保护膜，其中，所述粘附层的厚度小于所述曲面屏保护膜的厚度。
  16. 根据权利要求15所述的曲面屏保护膜，其中，所述粘附层的厚度为0.02毫米。
  17. 根据权利要求14所述的曲面屏保护膜，其中，所述凹陷部的深度等于所述曲面屏保护膜与所述黏附层的厚度之和的一半。
  18. 根据权利要求1所述的曲面屏保护膜，其中，所述凹陷部的纵截面为矩形、弧形或阶梯形的至少一种。
  19. 一种曲面盖板，其中，所述曲面盖板包括曲面屏保护膜，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
  20. 一种显示面板，其中，所述显示面板包括曲面屏保护膜，所述曲面屏保护膜包括平面区及位于所述平面区外侧的至少一弯曲区，所述曲面屏保护膜处于展平态时，所述曲面屏保护膜对应每个所述弯曲区的部分至少具有一凹陷部。
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