CN115394194B - Cover plate and flexible display device - Google Patents

Abstract

The application provides a cover plate and a flexible display device, relates to the technical field of flexible display, and is used for solving the problem that the cover plate is easy to generate plastic deformation and affects the display effect of the flexible display device when the flexible display device is stretched, and comprises a supporting layer and a protective layer; the supporting layer comprises a plurality of supporting pieces and a plurality of connecting pieces, the connecting pieces are provided with bending parts, and at least part of the bending parts are arranged in different directions from the other bending parts; the protective layer is arranged on the surface of the supporting layer. The cover plate provided by the application reduces the possibility of plastic deformation of the cover plate when the cover plate is stretched, and improves the display effect of the flexible display device.

Description

Cover plate and flexible display device

Technical Field

The application relates to the technical field of flexible display, in particular to a cover plate and a flexible display device.

Background

With the development of display technology, flexible display devices that can be bent are receiving a great deal of attention. The flexible display device generally includes a flexible display panel, a glue layer, and a cover plate, which are sequentially stacked, and the cover plate is bonded to the flexible display panel through the glue layer to protect the flexible display panel. However, when the flexible display device is stretched, the cover plate is also stretched, and plastic deformation of the cover plate is easy to occur, so that the display effect of the flexible display device is affected.

Disclosure of Invention

In view of the above, embodiments of the present application provide a cover plate and a flexible display device, which are used to reduce the possibility of plastic deformation of the cover plate when the flexible display device is stretched, and improve the display effect of the flexible display device.

In order to achieve the above object, the embodiment of the present application provides the following technical solutions:

A first aspect of an embodiment of the present application provides a cover plate, including a support layer and a protective layer;

the supporting layer comprises a plurality of supporting pieces and a plurality of connecting pieces, and every two adjacent supporting pieces are connected through the connecting pieces; the connecting piece is provided with a bending part, and at least part of the bending parts are arranged in a direction different from the arrangement direction of other bending parts;

the protective layer is arranged on the surface of the supporting layer.

According to the cover plate provided by the embodiment of the application, the supporting layer is arranged to comprise the plurality of supporting pieces and the plurality of connecting pieces, and every two adjacent supporting pieces are connected through the connecting piece with the bending part, so that when the cover plate is stretched, the arrangement direction of at least part of the bending parts is different from the arrangement direction of other bending parts; the stress on the bending part can be reduced by utilizing the stress release of the bending part, so that the possibility of plastic deformation of the cover plate is reduced, and the display effect of the flexible display device is improved.

In one possible implementation manner, the plurality of supporting pieces are arranged in a plurality of rows and a plurality of columns, each two adjacent supporting pieces in the same row are connected through the connecting piece, and each two adjacent supporting pieces in the same column are connected through the connecting piece.

In one possible implementation, between two adjacent supports in the same row, the curved portion is a circular arc-shaped curved portion that protrudes with respect to the row direction of the supports;

between two adjacent supports in the same column, the curved portion is a circular arc-shaped curved portion that protrudes with respect to the column direction of the supports.

In one possible implementation, each of the supports in the same row has a first centerline, the first centerline being parallel to the row direction; the number of the connecting pieces is two between two adjacent supporting pieces in the same row, and the two connecting pieces are symmetrically arranged relative to the first central line.

In one possible implementation, one of the supports in the same column has a second centerline, the second centerline being parallel to the row direction; and the number of the connecting pieces is two between two adjacent supporting pieces in the same column, and the two connecting pieces are symmetrically arranged relative to the second central line.

In one possible implementation, each of the supporting members is plate-shaped, and each of the supporting members is provided with a plurality of grooves;

Preferably, each of the supporting members extends in a row direction of the supporting members, the grooves extend in a column direction of the supporting members, and the lengths of the grooves are smaller than the widths of the supporting members.

In one possible implementation, each of the supporting members is provided with a plurality of through holes, and the plurality of through holes are arranged in a plurality of rows and columns.

In one possible implementation, the support layer further comprises a filler glue, the filler glue being provided as an elastic filler glue, the elastic filler glue being provided between adjacent support members.

In one possible implementation, the method further comprises a glue layer;

The glue film set up in the surface of supporting layer, the glue film is kept away from the surface connection of supporting layer the protective layer.

A second aspect of an embodiment of the present application provides a flexible display device, which includes the cover plate described above.

The embodiment of the application provides a flexible display device, which includes the cover plate described in any one of the above, and therefore, the advantages of the flexible display device including the cover plate described in any one of the above can be seen from the above related description, and the detailed description is omitted here.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of a related art flexible display device according to an embodiment of the present application;

FIG. 2 is a diagram showing stress and deformation of a cover plate in a tensile test of the cover plate according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a cover plate provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of a support layer provided with a trench according to an embodiment of the present application;

FIG. 5 is a schematic stress diagram of a support layer with grooves when bending a cover plate along a reference line according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a support layer provided with a through hole according to an embodiment of the present application;

FIG. 7 is a diagram showing stress and deformation of a cover plate in a tensile test of the cover plate according to an embodiment of the present application;

fig. 8 is a cross-sectional view of a flexible display device according to an embodiment of the present application.

Reference numerals illustrate:

100. A cover plate;

110. a support layer; 111. a support; 1111. a groove; 1112. a through hole; 1113. a first centerline; 1114. a second centerline; 112. a connecting piece; 1121. a bending portion; 113. filling glue; 120. a protective layer; 130. a glue layer; 140. a reference line;

200. A polarizer;

300. a flexible display panel;

400. an adhesive layer;

500. Stainless steel layer.

Detailed Description

As described in the background art, referring to fig. 1, in the related art, a flexible display device generally includes a flexible display panel 300, an adhesive layer 400, and a cover plate 100 which are sequentially stacked, a hardened coating is formed on a surface of the cover plate 100, and is adhered to the flexible display panel 300 through the adhesive layer 400, and a stainless steel layer 500 (Steel Use Stainless, abbreviated as SUS) is further adhered to a surface of the flexible display panel 300 facing away from the cover plate 100, so as to support the flexible display panel 300 through the cover plate 100 and the stainless steel layer 500 disposed on both sides of the flexible display panel 300. The cover plate 100 is typically made of a colorless transparent polyimide (Colorless Polyimide, abbreviated CPI) sheet material.

Referring to fig. 2, when the tensile test is performed using the above-described cover plate 100 having an initial length of 60mm as an example, when the deformation amount of the cover plate 100 made of colorless transparent polyimide is less than 10%, the stress of the cover plate 100 is linearly related to the deformation amount, the variation of the stress of the cover plate 100 is not changed, the cover plate 100 is in an elastic deformation stage, and when the deformation amount of the cover plate 100 exceeds 10%, the variation of the stress of the cover plate 100 is gradually reduced, that is, the cover plate 100 is plastically deformed, thereby affecting the shape recovery of the cover plate 100. Therefore, when the cover plate 100 is stretched to fold or stretch the flexible display device, the cover plate 100 is easily deformed plastically, thereby affecting the display effect of the flexible display device.

In view of the above technical problems, embodiments of the present application provide a cover plate, a flexible display device, and a flexible display device, where the cover plate includes a supporting layer and a protective layer covering a surface of the supporting layer, and the supporting layer is configured to include a plurality of supporting pieces and a plurality of connecting pieces, and each two adjacent supporting pieces are connected through a connecting piece having a bending portion, so that when the flexible display device is stretched or folded, stress directions of each bending portion are different, so that stress of each bending portion is released by using the bending portion of the connecting piece, and stress of each bending portion is reduced, so that deformation amount generated by the supporting layer can be reduced, further, possibility of plastic deformation of the cover plate is reduced, and display effect of the flexible display device is improved.

In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 3-6, an embodiment of the present application provides a cover plate 100, where the cover plate 100 includes a supporting layer 110 and a protective layer 120, a first surface of the supporting layer 110 is used for connecting with a flexible display panel 300to support the flexible display panel 300 through the supporting layer 110, and the protective layer 120 is disposed on a second surface of the supporting layer 110 to protect the supporting layer 110 and reduce the possibility of damage of the supporting layer 110.

Referring to fig. 4 and 6, the support layer 110 includes a plurality of support members 111 and a plurality of connection members 112, each two adjacent support members 111 being connected by the connection members 112; the connecting member 112 has bent portions 1121, and at least part of the bent portions 1121 are arranged in a direction different from that of the other bent portions 1121, so that when the cover plate 100 is stretched or bent, the stress direction is different from each other at least part of the bent portions 1121, whereby part of the tensile stress can be released through the bent portions 1121.

In some implementations of the embodiments of the present application, the plurality of supporting members 111 are arranged in a plurality of rows and a plurality of columns, and each two adjacent supporting members 111 in the same row are connected by a connecting member 112, and each two adjacent supporting members 111 in the same column are connected by a connecting member 112.

Illustratively, the cover plate 100 has a reference line 140, the reference line 140 configured to: when the cover plate 100 is stretched, the stress directions on both sides of the reference line 140 are opposite. To reduce the amount of deformation of the support layer 110 by releasing the stress applied to the support layer 110 through the bent portion 1121 when the cover plate 100 is stretched or bent along the reference line 140 of the cover plate 100.

With continued reference to fig. 4 and 6, exemplary angles are formed between the row and column directions, and the angle of the angles may be set to 90 °, or the angle of the angles may also be set to 60 °. When one of the row direction and the column direction is parallel to the reference line 140, then the other of the row direction and the column direction intersects the reference line 140; or both the row and column directions intersect the reference line 140 to ensure that at least a portion of the bending 1121 is stressed differently when the cover plate 100 is stretched or bent along the reference line 140.

Referring to fig. 5, exemplary, the reference lines 140 are disposed in parallel in the column direction, and the bent portion 1121 is provided with points a and B. When the cover plate 100 is stretched or bent along the reference line 140, the bending portion 1121 receives a stretching force, the force receiving direction at the point a is the tangential direction of the point a, and the force receiving direction at the point B is the tangential direction of the point B, so that the force receiving directions of the bending portion 1121 are different from each other to be able to release a part of the stress by the bending portion 1121.

In some implementations of the embodiments of the present application, the support 111 may be made of colorless transparent polyimide, so that light emitted from the flexible display panel 300 can pass through the support 111. Referring to fig. 4, the support members 111 may be provided in various shapes, and illustratively, each support member 111 has a plate shape, and in a plane of the support layer 110, the support members 111 have a rectangular shape, and each support member 111 extends in a row direction. Each support 111 is provided with at least one groove 1111 to release stress applied to the corresponding support 111 through the groove 1111 when stretching or bending the cover plate 100 along the reference line 140, reducing the amount of deformation generated by the corresponding support 111.

For example, on each support 111, the number of the grooves 1111 may be set to one or more, and when the number of the grooves 1111 is set to a plurality, the plurality of grooves 1111 may be arranged in the row direction to the support 111, each groove 1111 extending in the column direction. In the column direction, the length of the grooves 1111 is smaller than the width of the corresponding support 111 to reduce the possibility of breakage of the support 111.

In some implementations of embodiments of the present application, the groove 1111 may be disposed at various positions of the support 111, for example, in a column direction, both ends of the groove 1111 are disposed in the support 111, or one end of the groove 1111 is disposed in the support 111, and the other end extends to an edge of the support 111 in the column direction. Along the thickness direction of the support 111, the groove 1111 may also penetrate the support 111, i.e. the depth of the groove 1111 is equal to the thickness of the support 111; or the groove 1111 may be provided as a blind groove, i.e., the depth of the groove 1111 is smaller than the thickness of the support 111.

Or referring to fig. 6, each support 111 is further provided with a plurality of through holes 1112, and the plurality of through holes 1112 may be arranged in a plurality of rows and columns on the corresponding support 111, or the plurality of through holes 1112 may be arranged in a dispersed manner on the corresponding support 111, so that when the cover 100 is stretched or bent along the reference line 140 of the cover 100, the stress applied to the corresponding support 111 can be released through the plurality of through holes 1112, and the deformation amount generated by the corresponding support 111 is reduced.

In some implementations of embodiments of the present application, the extending direction of the through holes 1112 may be parallel to the thickness direction of the support 111, or the extending direction of the through holes 1112 may also form an angle with the thickness direction of the support 111; the cross-sectional shape of the through hole 1112 may be set to be square or circular with a plane perpendicular to the extending direction of the through hole 1112 as a cross section.

Referring to fig. 4 and 6, the distance between the adjacent two supports 111 in the same row may be equal to the distance between the adjacent two supports 111 in the same column, or when each support 111 is provided with a groove 1111 extending in the column direction, the distance between the adjacent two supports 111 in the same row may be further greater than the distance between the adjacent two supports 111 in the same column, so that part of the stress in the row direction can be released through the groove 1111, the stress to which the connection member 112 connecting the adjacent two supports 111 in the same row is subjected can be reduced, and thus the number of supports 111 arranged in the same row can be reduced.

It is easily understood that when the cover plate 100 is stretched or bent along the reference line 140 of the cover plate 100, the supporting members 111 are subjected to a stretching force in the row and/or column directions, and the supporting members 111 are also subjected to a pressing or stretching force in the thickness direction of the supporting layer 110, i.e., the sides of the supporting members 111 close to each other are subjected to the pressing force, and the sides of the supporting members 111 away from each other are subjected to the stretching force. The support 111 provided with the grooves 1111 or the through holes 1112 can release a pressing force or a stretching force in the thickness direction of the support layer 110 through the grooves 1111 or the through holes 1112 to reduce the amount of deformation generated by the support 111.

The connection member 112 may be made of colorless transparent polyimide, so that light emitted from the flexible display panel 300 can pass through the connection member 112, and in an exemplary embodiment, the connection member 112 may be integrally formed with the support member 111, so that the connection between the connection member 112 and the support member 111 is more stable, and in the thickness direction of the support layer 110, the thickness of the connection member 112 is equal to the thickness of the support member 111, so that the connection member 112 and the support member 111 arranged in the same layer are more uniformly stressed when the cover plate 100 is stretched or bent along the reference line 140.

Referring to fig. 4 and 6, in some implementations of embodiments of the application, each support 111 in the same row has a first centerline 1113, the first centerline 1113 being parallel to the row direction, and each support 111 in the same column has a second centerline 1114, the second centerline 1114 being parallel to the column direction. Between the adjacent two supporting pieces 111, the number of the connecting pieces 112 may be set to one or more, for example, the number of the connecting pieces 112 may be set to two, and the two connecting pieces 112 may be disposed between the adjacent two supporting pieces 111 at intervals, and illustratively, in the same row, between the adjacent two supporting pieces 111, the two connecting pieces 112 are symmetrically disposed with respect to the first center line 1113, and between the adjacent two supporting pieces 111 in the same column, the two connecting pieces 112 are symmetrically disposed with respect to the second center line 1114, so as to enhance the connection effect of the adjacent two supporting pieces 111 by the symmetrically disposed two connecting pieces 112.

Illustratively, between each adjacent two of the supporting members 111 in the same row, the two connecting members 112 are arranged in the column direction, a first end of each connecting member 112 is connected to one of the supporting members 111, a second end of each connecting member 112 is connected to the other supporting member 111, the curved portions 1121 of the connecting members 112 are provided as arc-shaped curved portions, and in the column direction, the curved portions 1121 of the two connecting members 112 are each protruded away from the first center line 1113; between every two adjacent support pieces 111 in the same column, two connection pieces 112 are arranged along the row direction, the first end of each connection piece 112 is connected with one support piece 111, the second end of each connection piece 112 is connected with the other support piece 111, the bending parts 1121 of the connection pieces 112 are arranged to be arc-shaped bending parts, and in the row direction, the bending parts 1121 of the two connection pieces 112 are protruded away from the second center line 1114, so that the connection between the two adjacent support pieces 111 is more stable, and the supporting effect of the support layer 110 can be further improved.

With continued reference to fig. 4 and 6, in some implementations of embodiments of the application, the number of bends 1121 of each connector 112 may be set to one or more, and illustratively, the number of bends 1121 of each connector 112 is set to one; the angle of the central angle corresponding to the curved portion 1121 having an arc shape is set to 90 °, and the diameter of the curved portion 1121 is greater than or equal to half the length of the corresponding connection member 112, so that most of the stress applied to the corresponding connection member 112 can be released through the curved portion 1121, thereby further reducing the amount of deformation generated by the support layer 110.

When the cover plate 100 is stretched or bent along the reference line 140 of the cover plate 100, the connection members 112 are subjected to a pressing force or a stretching force along the thickness direction of the supporting layer 110, that is, a pressing force is applied to a surface of the connection members 112 close to each other, a stretching force is applied to a surface of the connection members 112 far from each other, and the connection members 112 can release the pressing force or the stretching force along the thickness direction of the supporting layer 110 through the curved portions 1121 in an arc shape, so as to reduce the deformation amount generated by the connection members 112.

By adopting the above technical solution, as shown in fig. 7, the supporting layer 110 is configured to include a plurality of supporting members 111 and a plurality of connecting members 112, the plurality of supporting members 111 are arranged in a plurality of rows and a plurality of columns, and each two adjacent supporting members 111 in the same row and each two adjacent supporting members 111 in the same column are connected by the connecting member 112 having the bending portion 1121. When the cover plate 100 is stretched or bent along the reference line 140 in a tensile test, the support layer 110 can release stress through the connecting pieces 112 having the bending portions 1121 when the deformation amount of the support layer 110 is greater than 200%, so that the plurality of support pieces 111 and the connecting pieces 112 arranged in a plurality of rows and a plurality of columns do not have large plastic deformation, and compared with the cover plate 100 in the related art, the cover plate 100 provided by the embodiment of the application can select colorless transparent polyimide, and release stress through the connecting pieces 112 having the bending portions 1121, so as to reduce the possibility of plastic deformation of the cover plate 100.

Referring to fig. 3 to 6, in some implementations of the embodiment of the present application, the supporting layer 110 further includes a filling compound 113, the filling compound 113 is an elastic filling compound, the filling compound 113 is disposed between adjacent supporting members 111, the filling compound 113 is filled between adjacent connecting members 112 to protect the supporting members 111 and the connecting members 112, so that when the cover plate 100 is stretched or bent along the reference line 140, the filling compound 113 can abut against the corresponding supporting members 111 and the corresponding connecting members 112 to protect the corresponding supporting members 111 and the corresponding connecting members 112, and reduce deformation amounts of the corresponding supporting members 111 and the corresponding connecting members 112, thereby reducing the possibility of plastic deformation of the cover plate 100.

Illustratively, the filling compound 113 may be configured as a light transmissive optical compound (Optically CLEAR ADHESIVE, abbreviated as OCA) so that light emitted from the flexible display panel 300 attached to the second surface of the supporting layer 110 can pass through the filling compound 113. In the thickness direction of the supporting layer 110, the thickness of the filling glue 113 is equal to the thickness of the supporting member 111, and when the second surface of the supporting layer 110 is connected with the flexible display panel 300, the filling glue 113 formed by the optical glue covers the flexible display panel 300, so that the plurality of supporting members 111 and the plurality of connecting members 112 are adhered to the surface of the flexible display panel 300, and the connection between the supporting layer 110 and the flexible display panel 300 is more stable.

With continued reference to fig. 3-6, in some implementations of embodiments of the present application, the cover plate 100 provided by embodiments of the present application further includes a glue layer 130; the adhesive layer 130 is disposed on the second surface of the supporting layer 110, and the surface of the adhesive layer 130 away from the supporting layer 110 is connected with the protective layer 120, so that the protective layer 120 is adhered to the second surface of the supporting layer 110 through the adhesive layer 130, so that the connection between the protective layer 120 and the supporting layer 110 is more stable.

For example, the adhesive layer 130 may be provided as an optical adhesive so that light emitted from the flexible display panel 300 can sequentially pass through the support layer 110 and the adhesive layer 130. When the adhesive layer 130 and the filling adhesive 113 are made of the same material, the adhesive layer 130 and the filling adhesive 113 may be integrally formed on the plurality of supporting members 111, for example, after forming the supporting members 111 distributed in a plurality of rows and a plurality of columns and the connecting members 112 connecting the adjacent supporting members 111, the optical adhesive is coated between the plurality of supporting members 111 to form the filling adhesive 113 forming the supporting layer 110, and the optical adhesive is further coated on the second surface of the supporting layer 110 to form the adhesive layer 130 on the second surface of the supporting layer 110, so that the connection between the adhesive layer 130 and the filling adhesive 113 is more stable, and the possibility of generating a gap between the adhesive layer 130 and the supporting layer 110 is reduced.

In some implementations of the embodiment of the present application, the protective layer 120 covers the surface of the adhesive layer 130 away from the supporting layer 110, and the protective layer 120 may be made of a super-elastic material such as a silicone film, so as to reduce the possibility that the protective layer 120 is plastically deformed to affect the display effect of the flexible display device.

By adopting the above technical scheme, the cover plate 100 is stretched or bent along the reference line 140, so that when the deformation amount of the protective layer 120 is greater than 200%, the protective layer 120 molded by the silica gel is not subjected to large plastic deformation, and the possibility that the display effect of the flexible display device is affected by the plastic deformation of the cover plate 100 due to the occurrence of the protective layer 120 can be reduced on the basis of protecting the supporting layer 110.

In summary, by arranging the cover plate 100 to include the supporting layer 110, the protective layer 120 and the adhesive layer 130, the supporting layer 110 is configured to include a plurality of supporting members 111 and a plurality of connecting members 112, the plurality of supporting members 111 are arranged in a plurality of rows and a plurality of columns, and each two adjacent supporting members 111 in the same row and each two adjacent supporting members 111 in the same column are connected by the connecting member 112 having the bending portion 1121; the protection layer 120 is disposed on the surface of the support layer 110, and is adhered to the support layer 110 through the adhesive layer 130 to protect the support layer 110.

When the cover plate 100 is stretched or bent along the reference line 140, and thus the flexible display device is folded, the stress direction of each part of the bending part 1121 intersects with the reference line 140, so that the stress of the supporting layer 110 is released by using the bending part 1121 of the connecting piece 112, and the stress of each part of the bending part 1121 is reduced, so that the deformation amount generated by the supporting piece 111 and the connecting piece 112 can be reduced, and when the deformation amount of the whole supporting layer 110 is greater than 200%, the plurality of supporting pieces 111 and the connecting piece 112 which are arranged in a plurality of rows and columns still do not generate larger plastic deformation, thereby reducing the possibility of plastic deformation of the cover plate 100 and improving the display effect of the flexible display device.

The embodiment of the application also provides a flexible display device, which comprises the cover plate 100 described in each embodiment.

Referring to fig. 8, in some implementations of the embodiment of the present application, the flexible display device may further include a flexible display panel 300 and a polarizer 200 (Polarizer, abbreviated as POL), wherein the polarizer 200 is disposed on the first surface of the support layer 110, and a surface of the polarizer 200 remote from the support layer 110 is used for connecting the flexible display panel 300, so that light emitted from the flexible display panel 300 can sequentially pass through the polarizer 200, the support layer 110 and the protective layer 120.

The flexible display device may further include an adhesive layer 400, the adhesive layer 400 being disposed between the polarizer 200 and the support layer 110, the adhesive layer 400 being disposed on a surface of the polarizer 200 remote from the flexible display panel 300, the surface of the adhesive layer 400 remote from the polarizer 200 adhering to a first surface of the support layer 110, thereby adhering the cover plate 100 to the polarizer 200 and the flexible display panel 300. The adhesive layer 400 may be provided as a light-transmissive optical adhesive so that light emitted from the flexible display panel 300 can pass through the adhesive layer 400.

Since the flexible display device includes the cover plate 100, the flexible display device includes the advantages of the cover plate 100, and the embodiments of the present application will not be described again.

By way of example, the flexible display device may be a cell phone, tablet computer, notebook computer, electronic book, electronic paper, car computer, smart watch, wearable device, etc.

Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (5)

1. A cover sheet, wherein the cover sheet is stretchable, the cover sheet comprising a support layer and a protective layer;

the supporting layer comprises a plurality of supporting pieces and a plurality of connecting pieces, and every two adjacent supporting pieces are connected through the connecting pieces; the connecting piece is provided with a bending part, and at least part of the bending parts are arranged in a direction different from the arrangement direction of other bending parts;

the protective layer is arranged on the surface of the supporting layer;

the supporting layer further comprises filling glue, the filling glue is elastic filling glue, the elastic filling glue is arranged between the adjacent supporting pieces, and the filling glue can transmit light;

The plurality of supporting pieces are arranged in a plurality of rows and a plurality of columns, every two adjacent supporting pieces in the same row are connected through the connecting pieces, and every two adjacent supporting pieces in the same column are connected through the connecting pieces;

between two adjacent support pieces in the same row, the curved portion is a circular arc-shaped curved portion that protrudes with respect to the row direction of the support pieces;

between two adjacent support pieces in the same column, the curved portion is a circular arc-shaped curved portion that protrudes with respect to the column direction of the support pieces;

each of the supports in the same row has a first centerline, the first centerline being parallel to the row direction; the number of the connecting pieces is two between two adjacent supporting pieces in the same row, and the two connecting pieces are symmetrically arranged relative to the first central line;

each of the supports in the same column has a second centerline, the second centerline being parallel to the row direction; the number of the connecting pieces is two between two adjacent supporting pieces in the same column, and the two connecting pieces are symmetrically arranged relative to the second central line;

Each supporting piece is plate-shaped, and each supporting piece is provided with a plurality of grooves.

2. The cover plate of claim 1, wherein each of the supports extends in a row direction of the supports, the grooves extend in a column direction of the supports, and a length of the grooves is smaller than a width of the supports.

3. The cover plate according to claim 1, wherein each of the supporting members is provided with a plurality of through holes, and the plurality of through holes are arranged in a plurality of rows and a plurality of columns.

4. A cover sheet according to any one of claims 1-3, further comprising a glue layer;

The glue film set up in the surface of supporting layer, the glue film is kept away from the surface connection of supporting layer the protective layer.

5. A flexible display device comprising a cover plate according to any one of claims 1-4.