CN214587756U - Flexible cover plate, flexible display screen, display device and electronic equipment - Google Patents
Flexible cover plate, flexible display screen, display device and electronic equipment Download PDFInfo
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- CN214587756U CN214587756U CN202120379220.5U CN202120379220U CN214587756U CN 214587756 U CN214587756 U CN 214587756U CN 202120379220 U CN202120379220 U CN 202120379220U CN 214587756 U CN214587756 U CN 214587756U
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- flexible cover
- flexible substrate
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Abstract
The application provides a flexible cover plate, including flexible substrate and strengthening layer, the strengthening layer cover at least in flexible substrate faces a side surface of user. The reinforcing layer comprises at least one negative Poisson ratio material layer, the flexible base material is provided with an accommodating cavity, and an opening of the accommodating cavity faces the reinforcing layer and is used for accommodating part of the negative Poisson ratio material layer. The flexible cover plate is characterized in that the surface of the flexible base material of the flexible cover plate is provided with the reinforcing layer comprising at least one negative Poisson ratio material layer, and the negative Poisson ratio material layer has the negative Poisson ratio characteristic, so that the impact resistance of the flexible cover plate can be improved, and the risk that the flexible cover plate cracks and even breaks when being impacted by external force can be reduced. The application also provides a flexible display screen comprising the flexible cover plate, a display device comprising the flexible display screen, and an electronic device comprising the display device.
Description
Technical Field
The application relates to the technical field of display, especially, relate to a flexible apron that shock resistance is good, include the flexible display screen of flexible apron, include the display device of flexible display screen, and include display device's electronic equipment.
Background
In the flexible display screen, the flexible cover plate is a main film material for providing impact resistance to the flexible display screen, and therefore, the impact resistance of the flexible display screen is greatly affected by the flexible cover plate.
In the prior art, the flexible cover plate mainly has two kinds: one is a cover plate made by preparing a hardened layer on the surface of a transparent polymer material film, and the other is a cover plate made by directly adopting glass with a relatively thin thickness. However, the two cover plates have low impact resistance, and are easy to crack or even break when being impacted by external force, thereby affecting the related performance and application of the flexible display screen.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a flexible cover plate, a flexible display screen, a display device and an electronic device, wherein the flexible cover plate is provided with a reinforcing layer comprising at least one negative Poisson ratio material layer on the surface of a flexible base material, so that the impact resistance of the flexible cover plate is improved.
In order to realize above-mentioned purpose, the first aspect, this application provides a flexible apron, including flexible substrate and strengthening layer, the strengthening layer cover at least in flexible substrate faces a side surface of user, the strengthening layer includes at least one deck negative poisson's ratio material layer, flexible substrate has seted up and has accepted the chamber, the opening orientation of accepting the chamber the strengthening layer is in order to be used for accommodating the part negative poisson's ratio material layer.
In one embodiment, a projection shape of the receiving cavity on the surface of the flexible substrate includes one of a polygon, an ellipse, a oval, and a circle.
In one embodiment, the receiving cavity is formed by one of plasma etching, chemical etching and laser etching.
Preferably, in an embodiment, the accommodating cavities are multiple and arranged in an array structure, a grid structure, a net structure or a honeycomb structure.
Preferably, in an embodiment, the reinforcing layer is two layers and covers two opposite side surfaces of the flexible substrate respectively, and the accommodating cavities are formed in the two opposite side surfaces of the flexible substrate.
Further, in an embodiment, the reinforcing layer further includes a hardened material layer covering a side of the negative poisson's ratio material layer away from the flexible substrate.
In one embodiment, the material of the negative poisson's ratio material layer is selected from polyimide, polyformaldehyde, polyurethane, silicon dioxide, polytetrafluoroethylene, epoxy resin, graphene or indium-tin alloy.
In one embodiment, the material of the flexible substrate is selected from polyimide, polyethylene terephthalate, cyclic olefin polymer, cyclic olefin copolymer, or ultra-thin glass.
In a second aspect, the present application further provides a flexible display screen, which includes a flexible screen and the above-mentioned flexible cover plate, the flexible cover plate covers the display surface of the flexible screen.
In a third aspect, the present application further provides a display device, which includes a flexible display screen, where the flexible display screen includes the above flexible cover plate.
In a fourth aspect, the present application further provides an electronic device, which includes a display device, where the display device includes a flexible display screen, and the flexible display screen includes the above flexible cover plate.
Compared with the prior art, the beneficial effect that this application has does: the flexible cover plate is characterized in that the surface of the flexible base material is provided with the reinforcing layer comprising at least one negative Poisson ratio material layer, and the negative Poisson ratio material layer has the negative Poisson ratio characteristic, so that the impact resistance of the flexible cover plate can be improved, the risk that the flexible cover plate cracks or even breaks when being impacted by external force can be reduced, and the application of the flexible cover plate in flexible display screens, display devices and electronic equipment can be facilitated.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
Fig. 1 is a schematic perspective view of a flexible cover according to an embodiment of the present application.
Fig. 2 is a schematic sectional structure view of the flexible cover plate in fig. 1 along the direction II-II.
FIG. 3 is a top view of one embodiment of the flexible substrate of FIG. 2.
FIG. 4 is a top view of another embodiment of the flexible substrate of FIG. 2.
FIG. 5 is a top view of yet another embodiment of the flexible substrate of FIG. 2.
FIG. 6 is a top view of yet another embodiment of the flexible substrate of FIG. 2.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1 and fig. 2, the present application provides a flexible cover plate 1, which includes a flexible substrate 20 and a reinforcing layer 40, wherein the reinforcing layer 40 at least covers a side surface of the flexible substrate 20 facing a user (i.e., an upper surface of the flexible substrate 20 shown in fig. 1 and fig. 2).
As shown in fig. 1 and fig. 2, in an embodiment of the present application, the reinforcing layer 40 includes at least one negative poisson's ratio material layer 41, the flexible substrate 20 is provided with a receiving cavity 25 (see fig. 2), and an opening of the receiving cavity 25 faces the reinforcing layer 40 to receive a portion of the negative poisson's ratio material layer 41. It can be understood that the negative poisson's ratio material layer 41 is a layer structure made of a negative poisson's ratio material with a poisson ratio value between-1 and 0, and according to the negative poisson's ratio characteristic, when the negative poisson's ratio material layer 41 is impacted by an external force, the negative poisson's ratio material layer 41 contracts in the impact force direction and the direction perpendicular to the impact force direction at the same time, the material of the negative poisson's ratio material layer 41 flows to an impact position, so that the density of the impact position of the negative poisson's ratio material layer 41 by the external force is increased, and the more effective impact resistance is generated.
The application provides in the flexible apron 1, include at least one deck through the surface setting at its flexible substrate 20 the reinforcing layer 40 of negative poisson's ratio material layer 41, because negative poisson's ratio material layer 41 has negative poisson's ratio characteristic, thereby can improve the impact resistance of flexible apron 1 is favorable to reducing flexible apron 1 appears crackle when receiving external force impact and even cracked risk.
The number of the negative poisson's ratio material layers 41 included in the reinforcing layer 40 may be one layer, two layers, three layers or more, as long as the impact resistance of the flexible cover plate 1 can be improved, and is not limited. For convenience of description, in one embodiment shown in fig. 1 and fig. 2, the number of the negative poisson's ratio material layers 41 in the reinforcing layer 40 is one.
Wherein, the material of the flexible substrate 20 includes but is not limited to polyimide, polyethylene terephthalate, cyclic olefin polymer, cyclic olefin copolymer or ultra-thin glass; the material of the negative poisson's ratio material layer 41 includes, but is not limited to, polyimide, polyformaldehyde, polyurethane, silicon dioxide, polytetrafluoroethylene, epoxy resin, graphene or indium-tin alloy, any of the above materials can be modified and designed on a nanoscale through the prior art, and then has a negative poisson's ratio property, which is not described in detail. Specifically, in an embodiment of the present application, the flexible substrate 20 is made of ultra-thin glass, and the negative poisson's ratio material layer 41 is made of modified epoxy resin.
It will be appreciated that the overall thickness of the flexible cover 1 is generally thin, and therefore the thickness of the individual layer structures is also thin. The negative poisson's ratio material layer 41 may be attached to the flexible substrate 20 through an adhesive layer after being prepared by an atomic deposition process or a magnetron sputtering process, or may be directly prepared on the surface of the flexible substrate 20 by an atomic deposition process or a magnetron sputtering process, which is not limited in the embodiments of the present application. Specifically, as shown in fig. 1 and fig. 2, in an embodiment of the present application, the negative poisson's ratio material layer 41 is directly formed on the surface of the flexible substrate 20 by an atomic deposition process. In other embodiments, the negative poisson's ratio material layer 41 may be prepared by an atomic deposition process and then attached to the flexible substrate 20 through a glue layer, which includes but is not limited to an optical glue, a pressure sensitive glue, or an adhesive.
As shown in fig. 1 and fig. 2, in an embodiment of the present application, the flexible substrate 20 is provided with a receiving cavity 25 having an opening facing the reinforcing layer 40, the receiving cavity 25 is used for receiving a portion of the negative poisson's ratio material layer 41, so that a contact area between the negative poisson's ratio material layer 41 and the flexible substrate 20 is increased, which is beneficial to improving a binding force between the negative poisson's ratio material layer 41 and the flexible substrate 20 when the negative poisson's ratio material layer 41 is directly prepared on the surface of the flexible substrate 20, and thus the negative poisson's ratio material layer 41 can be prevented from falling off the flexible substrate 20. In other embodiments, when the negative poisson's ratio material layer 41 is attached to the flexible substrate 20 through a glue layer, the receiving cavity 25 may increase a contact area between the glue layer and the flexible substrate 20, and may also prevent the glue layer and the negative poisson's ratio material layer 41 attached to the glue layer from falling off from the flexible substrate 20.
In an alternative embodiment, the accommodating cavity 25 penetrates through the flexible substrate 20 along the thickness direction of the flexible substrate 20, that is, the accommodating cavity 25 is a through hole, and the processing efficiency can be improved by directly penetrating the accommodating cavity 25 through the flexible substrate 20; in another alternative embodiment, the receiving cavity 25 extends a partial distance along the thickness direction of the flexible base material 20 but does not penetrate through the flexible base material 20, that is, the receiving cavity 25 is a blind hole, and the hardness of the flexible base material 20 can be improved by not penetrating through the flexible base material 20 by the receiving cavity 25, so that the hardness of the flexible cover plate 1 is better. As shown in fig. 2, in an embodiment of the present application, the receiving cavity 25 does not penetrate through the flexible substrate 20. In the above embodiment, the hole diameters of the positions of the housing cavities 25 in the thickness direction of the flexible base material 20 are the same and do not vary, but the shape of the housing cavities 25 is not limited to this, and may be other shapes having varying hole diameters, such as a taper hole, a stepped hole, or a shaped hole, and the like, and is not limited thereto.
The shape of the projection of the receiving cavity 25 on the surface of the flexible substrate 20 includes, but is not limited to, a polygon, an ellipse, a waist circle, and a circle; moreover, the accommodating cavity 25 may be formed by any one of plasma etching, chemical etching and laser etching, which is not limited herein; in addition, the number of the receiving cavities 25 may be one, two or more, and is not limited as long as the contact area between the negative poisson's ratio material layer 41 and the flexible base material 20 can be increased to prevent the negative poisson's ratio material layer 41 from falling off from the flexible base material 20.
Preferably, as shown in fig. 2 and 3, in an embodiment of the present invention, the number of the receiving cavities 25 is multiple, and the receiving cavities 25 are arranged in an array structure on the surface of the flexible substrate 20 facing the reinforcing layer 40. In the plurality of receiving cavities 25, the projection shape of each receiving cavity 25 on the surface of the flexible substrate 20 may be the same or different. Preferably, for convenience of processing, in an embodiment of the present application, the projection shapes of the plurality of receiving cavities 25 on the surface of the flexible substrate 20 are the same, such as a rectangle shown in fig. 3 and a circle shown in fig. 4.
In other embodiments, the projection shapes of the plurality of receiving cavities 25 in an array structure on the surface of the flexible substrate 20 may be different, and may be any two or a combination of two or more of a polygon, a circle, an ellipse, and a oval.
As shown in fig. 5, in another embodiment, the plurality of receiving cavities 25 may also be formed by a plurality of rows or columns of receiving cavities 25, two adjacent rows or two adjacent columns of receiving cavities 25 are partially staggered, and the plurality of receiving cavities 25 are distributed in a mesh-like structure or a grid-like structure. The projection shapes of the plurality of receiving cavities 25 on the surface of the flexible substrate 20 may be the same or different, and the projection shape of each receiving cavity 25 is not limited. In the embodiment shown in fig. 5, the plurality of receiving cavities 25 have the same projection shape on the surface of the flexible substrate 20, and are all diamond-shaped.
In another embodiment, as shown in fig. 6, the receiving cavities 25 may also be arranged in a honeycomb structure on the surface of the flexible substrate 20 facing the reinforcing layer 40, the receiving cavities 25 include at least two receiving cavities 25 with different projection sizes, and at least one other receiving cavity 25 with a different projection size exists around each receiving cavity 25. The projection shapes of the plurality of receiving cavities 25 on the surface of the flexible substrate 20 may be the same or different, and the projection shape of each receiving cavity 25 is not limited. In the embodiment shown in fig. 6, the plurality of receiving cavities 25 include two receiving cavities 25 with different projection sizes, but the projection shape of each receiving cavity 25 on the surface of the flexible substrate 20 is the same and is a regular hexagon.
It can be understood that, by forming a plurality of receiving cavities 25 on the surface of the flexible substrate 20 facing the reinforcing layer 40, the contact area between the negative poisson's ratio material layer 41 and the flexible substrate 20 is further increased, which is more beneficial to preventing the negative poisson's ratio material layer 41 from falling off the flexible substrate 20.
Referring to fig. 1 and fig. 2 again, in an embodiment of the present application, the reinforcing layer 40 is two layers and covers two opposite side surfaces of the flexible substrate 20, and the receiving cavity 25 is formed on the two opposite side surfaces of the flexible substrate 20. Each side surface of the flexible substrate 20 is provided with a plurality of accommodating cavities 25 arranged in an array structure, each accommodating cavity 25 does not penetrate through the flexible substrate 20, and the plurality of accommodating cavities 25 on the two opposite side surfaces of the flexible substrate 20 correspond to each other one by one.
In other embodiments, the plurality of receiving cavities 25 on each side surface of the flexible substrate 20 may be arranged in a grid structure, a net structure or a honeycomb structure.
In other embodiments, the plurality of receiving cavities 25 on the two opposite side surfaces of the flexible substrate 20 may not correspond to each other.
In other embodiments, when the plurality of receiving cavities 25 are formed on both the opposite side surfaces of the flexible base material 20, some of the receiving cavities 25 may penetrate through the flexible base material 20, so that the negative poisson's ratio material layers 41 on the opposite side surfaces of the flexible base material 20 can be connected into a whole, which is more beneficial to preventing the negative poisson's ratio material layers 41 from falling off the flexible base material 20.
It can be understood that, in some embodiments of the present application, by disposing one reinforcing layer 40 on each of two opposite side surfaces of the flexible substrate 20, each of the two opposite side surfaces of the flexible cover 1 has high impact resistance, so that it is not necessary to distinguish between a front surface (i.e., a surface facing a user) and a back surface (i.e., a surface facing away from the user) of the flexible cover 1, thereby improving convenience of use of the flexible cover 1.
Of course, in other embodiments, the reinforcing layer 40 may only cover the surface of the flexible substrate 20 facing the user, so that the surface of the flexible cover 1 facing the user has a higher impact resistance.
Further preferably, as shown in fig. 1 and fig. 2, in an embodiment of the present application, the reinforcing layer 40 further includes a hardened material layer 43, and the hardened material layer 43 covers a side of the negative poisson's ratio material layer 41 away from the flexible base material 20, so that the surface hardness and the friction resistance of the flexible cover plate 1 can be improved. It should be noted that the thickness of the hardened material layer 43 is not too thick so as to avoid affecting the negative poisson's ratio characteristic of the negative poisson's ratio material layer 41 when being impacted by an external force.
To sum up, the present application provides flexible apron 1 includes at least one deck through the surface setting at its flexible substrate 20 the reinforcing layer 40 of negative poisson's ratio material layer 41 has improved flexible apron 1's shock resistance is favorable to reducing flexible apron 1 appears crackle when receiving external force and even cracked risk. Furthermore, the reinforcing layer 40 further includes a hardened material layer 43 covering the negative poisson's ratio material layer 41, which improves the surface hardness and the friction resistance of the flexible cover plate 1, thereby enhancing the practicability of the flexible cover plate 1.
The application also provides a flexible display screen, a display device comprising the flexible display screen, and an electronic device comprising the display device. The flexible display screen comprises a flexible screen and the flexible cover plate 1 in any embodiment, and the flexible cover plate 1 covers the display surface of the flexible screen. Because the flexible cover plate 1 has higher impact resistance, the flexible display screen is protected, and the application of the flexible cover plate 1 in the flexible display screen, the display device and the electronic equipment is enhanced.
It should be noted that the flexible cover 1 further has other functions and features that are the same as those of the flexible cover 1, and for a more detailed description, reference may be made to the related contents of the flexible cover 1, and details are not described here.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, references to the description of the terms "embodiment," "particular embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A flexible cover sheet, comprising:
a flexible substrate; and
the reinforcing layer at least covers one side surface of the flexible substrate facing the user, and comprises at least one negative Poisson's ratio material layer;
the flexible substrate is provided with an accommodating cavity, and an opening of the accommodating cavity faces the reinforcing layer and is used for accommodating part of the negative Poisson's ratio material layer.
2. The flexible cover sheet of claim 1, wherein a projected shape of the receiving cavity on the surface of the flexible substrate comprises one of a polygon, an ellipse, a oval, and a circle.
3. The flexible cover of claim 2, wherein the receiving cavity is formed by one of plasma etching, chemical etching and laser etching.
4. The flexible cover plate of claim 2, wherein the receiving cavity is a plurality of cavities arranged in an array structure, a grid structure, a net structure or a honeycomb structure.
5. The flexible cover sheet of any of claims 1 to 4, wherein the material of the layer of negative Poisson's ratio material is selected from polyimide, polyoxymethylene, polyurethane, silica, polytetrafluoroethylene, epoxy, graphene, or indium tin alloy.
6. The flexible cover plate of claim 5, wherein the reinforcing layer is two layers and covers two opposite side surfaces of the flexible substrate, and the receiving cavities are formed on the two opposite side surfaces of the flexible substrate.
7. The flexible cover sheet of claim 5, wherein the stiffening layer further comprises a layer of stiffening material covering a side of the layer of negative Poisson's ratio material remote from the flexible substrate.
8. The flexible cover sheet of any of claims 1 to 4, wherein the material of the flexible substrate is selected from the group consisting of polyimide, polyethylene terephthalate, cyclic olefin polymer, cyclic olefin copolymer, and ultra-thin glass.
9. A flexible display screen, comprising a flexible screen and the flexible cover plate according to any one of claims 1 to 8, wherein the flexible cover plate covers a display surface of the flexible screen.
10. A display device comprising a flexible display screen comprising a flexible cover sheet according to any one of claims 1 to 8.
11. An electronic device comprising a display device, the display device comprising a flexible display screen, the flexible display screen comprising the flexible cover sheet of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120379220.5U CN214587756U (en) | 2021-02-19 | 2021-02-19 | Flexible cover plate, flexible display screen, display device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120379220.5U CN214587756U (en) | 2021-02-19 | 2021-02-19 | Flexible cover plate, flexible display screen, display device and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN214587756U true CN214587756U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120379220.5U Expired - Fee Related CN214587756U (en) | 2021-02-19 | 2021-02-19 | Flexible cover plate, flexible display screen, display device and electronic equipment |
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| CN (1) | CN214587756U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114360386A (en) * | 2022-01-28 | 2022-04-15 | 合肥维信诺科技有限公司 | Flexible cover plate and display device |
| CN114596786A (en) * | 2022-03-22 | 2022-06-07 | 京东方科技集团股份有限公司 | Display cover plate, display device and preparation method |
| CN114783300A (en) * | 2022-05-30 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
-
2021
- 2021-02-19 CN CN202120379220.5U patent/CN214587756U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114360386A (en) * | 2022-01-28 | 2022-04-15 | 合肥维信诺科技有限公司 | Flexible cover plate and display device |
| CN114596786A (en) * | 2022-03-22 | 2022-06-07 | 京东方科技集团股份有限公司 | Display cover plate, display device and preparation method |
| CN114596786B (en) * | 2022-03-22 | 2024-03-01 | 京东方科技集团股份有限公司 | Display cover plate, display device and preparation method |
| CN114783300A (en) * | 2022-05-30 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
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