CN114842747B - Flexible cover plate, flexible display screen and electronic equipment - Google Patents
Flexible cover plate, flexible display screen and electronic equipment Download PDFInfo
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- CN114842747B CN114842747B CN202210377158.5A CN202210377158A CN114842747B CN 114842747 B CN114842747 B CN 114842747B CN 202210377158 A CN202210377158 A CN 202210377158A CN 114842747 B CN114842747 B CN 114842747B
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- 239000000758 substrate Substances 0.000 claims abstract description 115
- 239000011241 protective layer Substances 0.000 claims abstract description 73
- 238000005452 bending Methods 0.000 claims abstract description 71
- 239000010410 layer Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims description 15
- 239000004642 Polyimide Substances 0.000 claims description 12
- 229920001721 polyimide Polymers 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000005340 laminated glass Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Laminated Bodies (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a flexible cover plate, a flexible display screen and electronic equipment. The flexible cover plate comprises a bending region and an adjacent non-bending region, and comprises a substrate, a protective layer and a flexible layer; wherein, the stiffness of the part of the base plate corresponding to the non-bending area is larger than the stiffness of the part of the base plate corresponding to the bending area; the protective layer is laminated with the substrate; the stiffness of the protective layer is not more than the stiffness of the part of the substrate corresponding to the bending area; the flexible layer is disposed between the substrate and the protective layer. The part of this flexible apron needs to buckle has better bendability, and the part of need not buckling has sufficient stiffness, has effectively weakened the whole surface of this flexible apron and has taken place the risk of deformation.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible cover plate, a flexible display screen and electronic equipment.
Background
Along with the progress of science and technology and the development of society, the flexible display screen gradually goes into the field of vision of people, and brings brand-new user experience for consumers while being convenient for the consumers to live.
Currently, flexible display screens generally include a flexible cover plate, a base plate, and a display screen body disposed between the flexible cover plate and the base plate. The flexible cover plate is used for protecting the display screen body, and can be folded or bent along with the display screen body. However, in order to ensure that the flexible cover plate has good folding or bending performance, the existing flexible cover plate has low stiffness and the whole surface of the existing flexible cover plate is easy to deform.
Disclosure of Invention
The application provides a flexible cover plate, a flexible display screen and electronic equipment, and aims to solve the problems that the existing flexible cover plate is low in stiffness and the whole surface of the existing flexible cover plate is easy to deform.
In order to solve the technical problems, the application adopts a technical scheme that: a flexible cover plate is provided. The flexible cover plate comprises a bending region and an adjacent non-bending region; the flexible cover plate includes: a substrate, a protective layer, and a flexible layer; wherein, the stiffness of the part of the base plate corresponding to the non-bending area is larger than the stiffness of the part of the base plate corresponding to the bending area; the protective layer is laminated with the substrate; the stiffness of the protective layer is not more than the stiffness of the part of the substrate corresponding to the bending area; the flexible layer is disposed between the substrate and the protective layer.
In one possible embodiment, the protective layer has a uniform stiffness; the stiffness of the part of the substrate corresponding to the bending area is the same as that of the protective layer;
Preferably, the orthographic projection of the protective layer and the flexible layer on the substrate is completely coincident with the substrate.
In one possible embodiment, the substrate has thinned regions and non-thinned regions disposed at intervals; wherein the thinning area is positioned in the bending area, and at least part of the flexible layer is filled in the thinning area; the non-thinning area is positioned in the non-bending area;
preferably, the material of the thinning area and the material of the non-thinning area are the same and are integrally formed;
preferably, the thickness of the protective layer is not greater than the thickness of the thinned region.
In one possible implementation manner, at least one groove is formed on the surface of the substrate, which is close to the protective layer, a thinning area is formed on the part of the substrate corresponding to the groove, and a non-thinning area is formed on the rest part of the substrate;
Preferably, the flexible layer fills each recess.
In one possible embodiment, the number of the grooves is one, one groove is a through groove extending along the first direction of the substrate, and the non-thinning region comprises a first non-thinning region and a second non-thinning region which are respectively positioned at two opposite sides of the groove; or alternatively, the first and second heat exchangers may be,
The number of the grooves is multiple, and the grooves are arranged at intervals along the second direction of the substrate; wherein the first direction is perpendicular to the second direction.
In one possible embodiment, the inner surface of the groove is curved;
Preferably, the inner surface of the groove is an arc surface.
In one possible implementation, the materials of the substrate and the protective layer are glass; or alternatively, the first and second heat exchangers may be,
The substrate is made of glass, and the protective layer comprises a transparent polyimide layer and a hardening layer laminated on the first surface and the second surface of the transparent polyimide layer; or the protective layer comprises laminated glass and transparent polyimide layers; wherein the first surface and the second surface are arranged in opposite directions;
Preferably, the flexible layer is a transparent optical adhesive.
In one possible embodiment, the substrate has a uniform thickness, and the elastic modulus of the portion of the substrate corresponding to the non-bending region is greater than the elastic modulus of the portion of the substrate corresponding to the bending region, and the elastic modulus of the protective layer is not greater than the elastic modulus of the bending region.
In order to solve the technical problems, the application adopts another technical scheme that: a flexible display screen is provided. The flexible display screen comprises the flexible cover plate, the display screen body and the bottom plate; the display screen body is arranged between the flexible cover plate and the bottom plate.
In order to solve the technical problems, the application adopts another technical scheme that: an electronic device is provided. The electronic device comprises the flexible display screen referred to above.
According to the flexible cover plate, the flexible display screen and the electronic equipment provided by the embodiment of the application, the laminated substrate and the protective layer are arranged on the flexible cover plate, so that the stiffness of the part of the substrate corresponding to the non-bending area is larger than the stiffness of the part of the substrate corresponding to the bending area, and the stiffness of the protective layer is not larger than the stiffness of the part of the substrate corresponding to the bending area; therefore, the protection layer and the stiffness of the part, which needs to be bent, on the base plate can be set according to the folding or bending performance of the flexible cover plate, so that the flexible cover plate is ensured to have better bending performance; and meanwhile, the part of the base plate which does not need to be bent has enough stiffness so as to reduce the risk of deformation of the whole surface of the flexible cover plate as much as possible. Meanwhile, the flexible layer is arranged between the substrate and the protective layer, so that the gap can be filled when the gap exists between the substrate and the protective layer, the whole thickness of the flexible cover plate is uniform, and the surface smoothness is good.
Drawings
FIG. 1 is a schematic view of a flexible cover plate according to an embodiment of the present application;
FIG. 2a is a bottom view of a substrate according to an embodiment of the present application;
FIG. 2b is a bottom view of a substrate according to another embodiment of the present application;
FIG. 2c is a bottom view of a substrate according to another embodiment of the present application;
FIG. 3 is a schematic view of a flexible cover plate according to another embodiment of the present application;
FIG. 4 is a schematic structural view of a flexible cover plate according to another embodiment of the present application;
FIG. 5 is a schematic view of a flexible cover plate according to another embodiment of the present application;
FIG. 6 is a schematic diagram of a flexible display screen provided by the present application;
fig. 7 is a schematic diagram of an electronic device according to the present application.
Description of the reference numerals
A flexible cover plate 10; a bending region 10a; a non-inflection region 10b; a substrate 11; a thinned region 111; a non-thinned region 112; a groove 113; a protective layer 12; a transparent polyimide layer 121; a hardened layer 122; a flexible layer 13; a flexible display screen 20; a display screen body 21; a bottom plate 22; an electronic device 30.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described 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.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The present application will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a flexible cover plate 10 according to an embodiment of the application; in the present embodiment, a flexible cover plate 10 is provided, and the flexible cover plate 10 is used to attach to a display screen body 21 (see fig. 6 below) so as to protect the display screen body 21. The flexible cover sheet 10 may be folded, specifically including a folded region 10a and an adjacent non-folded region 10b. Wherein, the bending area 10a refers to the bending part of the flexible cover plate 10 in the bending process; the non-bending region 10b refers to a portion of the flexible cover plate 10 that does not need to be bent during bending.
As shown in fig. 1, the flexible cover sheet 10 includes a substrate 11, a protective layer 12, and a flexible layer 13. The substrate 11 and the protective layer 12 are stacked, and the protective layer 12 may be an integrally formed structure, and the protective layer 12 has a uniform stiffness. The flexible layer 13 is disposed between the substrate 11 and the protective layer 12. For convenience of description, the following defines that the portion of the substrate 11 corresponding to the bending region 10a is a bending portion, and the portion of the substrate 11 corresponding to the non-bending region 10b is a non-bending portion.
As shown in fig. 1, in the embodiment, the stiffness of the non-bending portion of the substrate 11 is greater than the stiffness of the bending portion, and the stiffness of the protective layer 12 is not greater than the stiffness of the bending portion; the stiffness of the protective layer 12 and the portion of the substrate 11 to be bent can be set according to the foldable or bending property of the flexible cover plate 10, so as to ensure that the flexible cover plate 10 has better bending property; at the same time, the non-bending part of the base plate 11 facing away from the display screen body 21, which does not need to be bent, has enough stiffness to reduce the risk of deformation of the whole surface of the flexible cover plate 10 as much as possible. In a specific embodiment, the stiffness of the protective layer 12 is the same as the stiffness of the bending portion of the base plate 11, and the specific stiffness value may be the same as or similar to the stiffness of the conventional flexible cover plate 10.
In an embodiment, referring to fig. 2a and 2b, fig. 2a is a bottom view of a substrate 11 according to an embodiment of the present application. Fig. 2b is a bottom view of a substrate 11 according to another embodiment of the present application; the substrate 11 shown in fig. 1 is A-A view of fig. 2 b. The substrate 11 has thinned regions 111 and non-thinned regions 112 arranged at intervals. Wherein the thinned region 111 is located in the bending region 10a, and forms a bending portion of the substrate 11, and at least part of the flexible layer 13 is filled in the thinned region 111; the non-thinned region 112 is located on the non-inflection region 10b and forms a non-inflection portion of the substrate 11.
In this embodiment, the thickness of the non-thinned region 112 is greater than the thickness of the thinned region 111, so that the thickness of the non-thinned region 112 of the substrate 11 is thicker, with enough stiffness, and the thickness of the non-thinned region 112 is thinner to achieve buckling or bending. Thus, the bending performance of the substrate 11 is not affected, and the overall stiffness of the substrate 11 can be improved, so that the deformation of the whole surface of the substrate 11 is avoided. Specifically, in this embodiment, the thickness of the protective layer 12 is not greater than the thickness of the thinned region 111 of the substrate 11. Preferably, the thickness of the protective layer 12 is the same as the minimum thickness of the thinned region 111 of the substrate 11; to effectively ensure the overall folding performance of the flexible cover 10.
Specifically, the thinned region 111 and the non-thinned region 112 of the substrate 11 are integrally formed, and the thinned region 111 and the non-thinned region 112 are the same in material, i.e., the elastic modulus of the two is the same.
Specifically, as shown in fig. 1 to 2b, at least one groove 113 is formed on the surface of the substrate 11 adjacent to the protective layer 12, a thinned region 111 is formed on a portion of the substrate 11 corresponding to each groove 113, and a plurality of non-thinned regions 112 are formed on the remaining portion.
In one embodiment, as shown in fig. 2a, the number of the grooves 113 is one, and one groove 113 is a through groove extending along the first direction B of the substrate 11, so as to ensure the overall bending performance of the substrate 11. In this embodiment, the substrate 11 includes one thinned region 111 and two non-thinned regions 112, and the two non-thinned regions 112 are a first non-thinned region 112a and a second non-thinned region 112b located on opposite sides of the groove 113, respectively.
In another embodiment, as shown in fig. 2b, unlike the substrate 11 corresponding to fig. 2a, the number of the grooves 113 is plural, and the plural grooves 113 are arranged at intervals along the second direction C of the substrate 11. In this embodiment, the substrate 11 includes a plurality of thinned regions 111 and a plurality of non-thinned regions 112 alternately arranged with the plurality of thinned regions 111 and connected to each other. That is, the flexible cover 10 may be bent in a plurality of positions.
Specifically, as shown in fig. 2b, the number of grooves 113 is two, and the two grooves 113 are a first groove 113a and a second groove 113b, respectively; the first grooves 113a and the second grooves 113b are spaced apart along the second direction C of the substrate 11. In this particular embodiment, the substrate 11 includes two thinned regions 111 and three non-thinned regions 112. The three non-thinned regions 112 are a third non-thinned region 112c and a fourth non-thinned region 112d located on opposite sides of the first recess 113a, respectively, and a fifth non-thinned region 112e located on a side of the second recess 113b facing away from the first recess 113 a.
Specifically, the inner surface of each groove 113 may be a curved surface, that is, the thickness of the thinned region 111 of the substrate 11 is gradually reduced, and the maximum thickness of the thinned region 111 is the same as the thickness of the non-thinned region 112 of the substrate 11; the probability of breakage of the substrate 11 at the junction of the thinned region 111 and the non-thinned region 112 during bending of the substrate 11 can be reduced more effectively than if the recess 113 were rectangular. Specifically, each groove 113 or at least a part of the inner surface of the groove 113 may be an arc surface.
Of course, in other embodiments, as shown in fig. 2c, fig. 2c is a bottom view of a substrate 11 according to still another embodiment of the present application; each of the thinning regions 111 may also be provided with a plurality of grooves 113, and the plurality of grooves 113 are arranged at intervals along the first direction B, so as to prevent the flexible cover plate 10 from breaking or cracking at the thinning region 111 while ensuring good bending performance of each of the thinning regions 111. Wherein each groove 113 of the plurality of grooves 113 may extend in the first direction B, or as shown in fig. 2C, each groove 113 extends in the second direction C; or a portion of the grooves 113 of the plurality of grooves 113 extend in the first direction B, and a portion of the grooves 113 extend in the second direction C; or each groove 113 extends obliquely at a predetermined angle to the first direction B. The angle value of the preset included angle can be 30 degrees, 60 degrees, 120 degrees or the like.
In this embodiment, through setting up the protective layer 12 at the one side surface of recess 113 at base plate 11, can make this flexible apron 10 and the one side surface that display screen body 21 laminated (namely the protective layer 12 deviates from the one side surface of base plate 11) and the opposite side surface that is opposite to this surface (namely the base plate 11 deviates from the one side surface of protective layer 12) all have better planarization, compare in the scheme of laminating base plate 11 directly with display screen body 21, can improve the laminating degree between flexible apron 10 and the display screen body 21, be convenient for laminate flexible apron 10 in display screen body 21, thereby avoid causing the influence to flexible apron 10's bending property and/or display performance. Meanwhile, since the stiffness of the protective layer 12 is not greater than that of the thinned region 111 of the substrate 11, the folding or bending performance of the flexible cover 10 is not affected even if the protective layer 12 is added.
Further, referring to fig. 3, fig. 3 is a schematic view of the flexible layer 13 filling only the recess 113; in this embodiment, the substrate 11 is directly contacted with the protective layer 12, and the flexible layer 13 fills each groove 113 to ensure the uniformity of the overall thickness of the flexible cover plate 10; thus, the flexible cover plate 10 and the display screen body 21 are tightly combined, the overall hardness of the flexible cover plate 10 can be effectively ensured, the position of the flexible cover plate 10 corresponding to the groove 113 is avoided, the concave pit facing the display screen body 21 is formed under the action of external force, and the service life of the flexible cover plate 10 is effectively prolonged.
In a preferred embodiment, in order to avoid the flexible layer 13 affecting the bending performance and the display performance of the flexible cover plate 10, the flexible layer 13 may be specifically a transparent optical adhesive with a low elastic modulus. The flexible layer 13 thus further bonds the substrate 11 and the protective layer 12 together while filling the recess 113 to form a unitary flexible cover 10. Specifically, as shown in fig. 1, the flexible layer 13 further extends from within the groove 113 to the edge positions of the substrate 11 and the protective layer 12, so that the portion of the flexible layer 13 extending outside the groove 113 is arranged to be laminated with the substrate 11 and the protective layer 12. Specifically, the orthographic projection of the protective layer 12 and the flexible layer 13 on the substrate 11 is completely coincident with the substrate 11. In this way, the flexible layer 13 can be further used to fill other gaps between the substrate 11 and the protective layer 12, so as to avoid the influence of the gaps on the adhesion between the flexible cover plate 10 and the display screen body 21, the bending of the flexible cover plate 10, and the display performance; meanwhile, the substrate 11 and the protective layer 12 can be completely bonded to avoid the problem of delamination or cracking during bending.
Of course, in other embodiments, the flexible layer 13 may also be a transparent liquid. In this embodiment, the flexible layer 13 may be filled only in the groove 113, and edges of the substrate 11 and the protective layer 12 may be bonded by other glue.
In this embodiment, the materials of the substrate 11 and the protective layer 12 may be glass; the protective layer 12 may be made of ultra-thin glass, and the thickness of the ultra-thin glass may be the same as the existing structure of the flexible cover plate 10, so as to ensure that the protective layer 12 has better folding or bending performance. The glass material can be any one of acrylic glue, soluble polyimide slurry, epoxy resin, silica gel, polyurethane or polycarbonate transparent paint. Of course, in other embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a flexible cover plate 10 according to still another embodiment of the present application; the protective layer 12 may also specifically include a transparent polyimide layer 121 and a cured layer 122 laminated on the first and second surfaces of the transparent polyimide layer 121. The organic material of the hardening layer 122 may be one or more of acrylic, epoxy, silicone, and urethane. Of course, in other embodiments, the protective layer 12 may be a laminated structure combining the two. For example, the protective layer 12 includes a laminated ultra thin glass and transparent polyimide layer 121.
Specifically, in this embodiment, the thickness of the non-thinned region 112 of the substrate 11 may range from 0.5mm to 2mm; the minimum thickness of the thinned region 111 of the substrate 11 may range from 0.01mm to 0.3mm; the thickness of the protective layer 12 may range from 0.01mm to 0.2mm.
The three-layer structure of the flexible cover plate 10 according to the present embodiment is provided with the substrate 11, so that the thickness of the non-thinned region 112 of the substrate 11, which does not need to be bent, is thicker, and has sufficient stiffness, and the thickness of the thinned region 111, which needs to be bent or curved, is thinner, so that the flexible cover plate 10 can be bent or curved. Meanwhile, by providing the flexible layer 13 and adopting the transparent optical adhesive with low elastic modulus, bending is facilitated, and the gap between the substrate 11 and the protective layer 12 can be filled and flattened by using the flexible layer 13. In addition, the protective layer 12 adopts ultra-thin glass with uniform thickness and flat surface, or a transparent polyimide layer 121 with a hardened layer 122 coated on the front side and the back side, or a laminated structure combining the two, so that any position of the layer has bending capability. The first surface and the second surface of the flexible cover plate 10 opposite to the first surface are flat surfaces, the whole thickness of the flexible cover plate 10 is uniform, local folding or bending can be realized, and meanwhile, the area without bending can be ensured to have enough stiffness; meanwhile, the thickness is uniform, the surface is flat, and the flexible display screen is easier to attach.
In another embodiment, referring to fig. 5, fig. 5 is a schematic structural diagram of a flexible cover plate 10 according to still another embodiment of the present application; the substrate 11 has a uniform thickness, and the elastic modulus of the material of the non-bending portion of the substrate 11 is greater than that of the material of the bending portion; and the elastic modulus of the material of the protective layer 12 is not greater than the elastic modulus of the material of the bending portion of the substrate 11; thus, the elastic modulus of the bending region 10a of the flexible cover plate 10 can be lower, so that the flexible cover plate 10 can be folded or curled; the elastic modulus of the non-bending part of the substrate 11 is made larger to improve the stiffness of the non-bending part of the substrate 11 and avoid the deformation of the whole surface of the substrate 11. It will be appreciated that in this embodiment, the non-bent portion and the bent portion of the substrate 11 may be injection molded from different materials. The hardness of the non-bent portion of the substrate 11 may be 9H or more; the hardness of the bending portion of the substrate 11 and the protective layer 12 may be 4H or less. The non-bending portion of the substrate 11 may be toughened glass, and the material of the bending portion of the substrate 11 may be the material of the conventional glass flexible cover plate 10. In this embodiment, the thickness of the substrate 11 may be greater than or equal to the thickness of the protective layer 12; of course, the thickness of the substrate 11 may also be smaller than the thickness of the protective layer 12. Specifically, in this embodiment, the flexible layer 13 may not be provided between the substrate 11 and the protective layer 12.
Specifically, in this embodiment, the thickness of the substrate 11 may be 0.5mm to 2mm, and the thickness of the protective layer 12 may be 0.01mm to 0.2mm.
In this embodiment, referring to fig. 6, fig. 6 is a schematic structural diagram of a flexible display screen 20 provided by the present application; a flexible display 20 is provided, the flexible display 20 comprising a flexible cover 10, a display body 21 and a base 22. The flexible cover 10 is the flexible cover 10 according to any of the above embodiments, and the specific structure and function of the flexible cover 10 according to the above embodiments may be described in the related description of the flexible cover 10 provided by the above embodiments, which is not repeated herein.
The display screen 21 is disposed between the flexible cover 10 and the base 22, and is used for displaying images during operation. The bottom plate 22 is used for supporting the display screen body 21. The specific structure and function of the display screen body 21 and the bottom plate 22 are the same as or similar to those of the display screen body 21 and the bottom plate 22 in the conventional flexible display screen 20, and the same or similar technical effects can be achieved, and the detailed description thereof will not be repeated herein.
In this embodiment, referring to fig. 7, fig. 7 is a schematic diagram of an electronic device 30 provided by the present application; an electronic device 30 is provided, and the electronic device 30 may be a mobile phone, a computer, a notebook, a smart watch, etc. The electronic device 30 includes the flexible display 20 according to any of the embodiments described above to display a picture. The specific structure and function of the flexible display 20 can be referred to the related description of the flexible display 20 provided in the above embodiments, and the same or similar technical effects can be achieved, which will not be repeated here. Of course, the electronic device 30 further includes other structures or components of the existing electronic device 30, which can be specifically referred to in the prior art, and can achieve the same or similar technical effects, which are not described herein.
The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the application.
Claims (13)
1. A flexible cover sheet comprising a inflection region and an adjacent non-inflection region, the flexible cover sheet comprising:
a substrate; the stiffness of the part of the substrate corresponding to the non-bending region is greater than that of the part of the substrate corresponding to the bending region;
A protective layer which is laminated with the substrate and is in direct contact and lamination with the substrate; the stiffness of the protective layer is not greater than that of the part of the substrate corresponding to the bending area; wherein, the surface of the substrate close to the protective layer forms at least one groove, and the at least one groove is positioned in the bending area;
The flexible layers are filled in each groove and are arranged between the substrate and the protective layer;
The protective layer has uniform stiffness;
the substrate is provided with thinning areas and non-thinning areas which are arranged at intervals; wherein the thinning area is positioned in the bending area, and at least part of the flexible layer is filled in the thinning area; the non-thinning area is positioned in the non-bending area; the thickness of the protective layer is the same as the minimum thickness of the thinned region of the substrate.
2. The flexible cover sheet of claim 1, wherein a portion of the substrate corresponding to the inflection region has the same stiffness as the protective layer;
The orthographic projection of the protective layer and the flexible layer on the substrate is completely overlapped with the substrate.
3. The flexible cover sheet of claim 1 wherein the flexible cover sheet comprises a flexible cover sheet,
The material of the thinning area and the material of the non-thinning area are the same and the thinning area and the non-thinning area are integrally formed.
4. A flexible cover sheet according to claim 3, wherein the thickness of the protective layer is no greater than the thickness of the thinned region.
5. A flexible cover sheet according to claim 3, wherein a portion of the base sheet corresponding to the recess forms the thinned region and the remainder forms the non-thinned region.
6. The flexible cover sheet of claim 5 wherein said flexible layer fills each of said grooves.
7. The flexible cover sheet of claim 5 wherein the flexible cover sheet comprises,
The number of the grooves is one, one groove is a through groove extending along the first direction of the substrate, and the non-thinning areas comprise a first non-thinning area and a second non-thinning area which are respectively positioned at two opposite sides of the groove; or alternatively, the first and second heat exchangers may be,
The number of the grooves is multiple, and the grooves are arranged at intervals along the second direction of the substrate; wherein the first direction is perpendicular to the second direction.
8. A flexible cover sheet according to any one of claims 5 to 7, wherein the inner surface of the recess is curved.
9. The flexible cover sheet of claim 8 wherein the inner surface of the groove is an arcuate surface.
10. A flexible cover sheet according to claim 3, wherein the substrate and the protective layer are both glass; or alternatively, the first and second heat exchangers may be,
The substrate is made of glass, and the protective layer comprises a transparent polyimide layer and a hardening layer laminated on the first surface and the second surface of the transparent polyimide layer; or the protective layer includes laminated glass and the transparent polyimide layer; wherein the first surface and the second surface are disposed opposite to each other.
11. The flexible cover sheet of claim 10 wherein the flexible layer is a transparent optical adhesive.
12. A flexible display screen comprising the flexible cover sheet, the display screen body, and the base sheet of any one of claims 1-11; the display screen body is arranged between the flexible cover plate and the bottom plate.
13. An electronic device comprising the flexible display of claim 12.
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