CN114582239B - Flexible cover plate, display device and preparation method of flexible cover plate - Google Patents
Flexible cover plate, display device and preparation method of flexible cover plate Download PDFInfo
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- CN114582239B CN114582239B CN202210275767.XA CN202210275767A CN114582239B CN 114582239 B CN114582239 B CN 114582239B CN 202210275767 A CN202210275767 A CN 202210275767A CN 114582239 B CN114582239 B CN 114582239B
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- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 75
- 238000000576 coating method Methods 0.000 claims abstract description 75
- 239000000853 adhesive Substances 0.000 claims description 99
- 230000001070 adhesive effect Effects 0.000 claims description 99
- 239000000463 material Substances 0.000 claims description 71
- 238000007493 shaping process Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 238000007790 scraping Methods 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
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- 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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a preparation method of flexible apron, display device and flexible apron, flexible apron is including supporting layer and the hardening coating of range upon range of setting, and the supporting layer includes body portion and bonding portion, and body portion includes towards the first surface of hardening coating to and by the holding tank that first surface was sunken to form along flexible apron thickness direction, bonding portion inlays in each holding tank, and the diapire of holding tank passes through bonding portion and is connected with the hardening coating, and the hardness parameter of part bonding portion is greater than the hardness parameter of body portion. Be provided with the holding tank on the supporting layer in the flexible apron of this application embodiment, the holding tank is embedded to have bonding portion, and bonding portion can improve the scratch resistance on flexible apron surface when realizing that holding tank diapire is connected with the hardening coating, improves flexible apron's reliability.
Description
Technical Field
The application relates to the technical field of display equipment, in particular to a flexible cover plate, a display device and a preparation method of the flexible cover plate.
Background
With the rapid development of display technology, there is an increasing demand for display devices, and in order to further realize the requirement that the display devices can be conveniently stored or carried when not in use, flexible display devices that are foldable or rollable are attracting more and more attention.
The size of foldable or rollable flexible display devices is continuously reduced in view of space saving and portability, so that the design requirements for the terminal mechanism are higher and higher, which is a great challenge for the current display industry.
Disclosure of Invention
The embodiment of the application provides a flexible cover plate, a display device and a preparation method of the flexible cover plate, which can prolong the service life of the flexible cover plate.
In a first aspect, the embodiment of the application provides a flexible apron, including supporting layer and the hardening coating of range upon range of setting, the supporting layer includes body portion and bonding portion, and body portion includes towards the first surface of hardening coating to and by the holding tank that first surface was sunken formation along flexible apron thickness direction, bonding portion inlays in each holding tank, and the diapire of holding tank is connected with the hardening coating through bonding portion, and the hardness parameter of part bonding portion is greater than the hardness parameter of body portion.
In some embodiments, the bonding portion includes a first bonding portion and a second bonding portion stacked in a thickness direction of the flexible cover plate, the first bonding portion being connected to the bottom wall by the second bonding portion; the hardness parameter of the first bonding part is larger than that of the main body part and larger than that of the second bonding part.
In some embodiments, the hardness parameter of the second bond is less than the hardness parameter of the body portion.
In some embodiments, a gap is formed between the first bonding portion and the side wall of the accommodating groove, the bonding portion further comprises a third bonding portion arranged in the gap, the first bonding portion is connected with the side wall through the third bonding portion, and the hardness parameter of the first bonding portion is larger than that of the third bonding portion.
In some embodiments, the hardness parameter of the third bond is less than the hardness parameter of the body portion.
In some embodiments, the third bond is disposed around the outer peripheral side of the first bond.
In some embodiments, the hardened coating includes a first hardened portion and a second hardened portion, the first hardened portion includes a plurality of receiving portions that are spaced apart, and the second hardened portion is embedded within each receiving portion to form a film layer structure that covers the support layer, the second hardened portion having a hardness parameter that is greater than the hardness parameter of the first hardened portion.
In some embodiments, the orthographic projection of the third bond portion on the hardened coating at least partially overlaps the second hardened portion.
In some embodiments, the orthographic projection of the third bond portion on the hardened coating is within the outer contour of the second hardened portion.
In some embodiments, the orthographic projection of the third bond portion on the hardened coating at least partially overlaps the orthographic projection of the second bond portion on the hardened coating, the receiving portion extends through the hardened coating, the second bond portion is connected to the second bond portion by the third bond portion, and at least a portion of the first bond portion is connected to the second bond portion by the first bond portion.
In some embodiments, the first adhesive portion includes a second surface facing away from the bottom wall, and the third adhesive portion includes a third surface facing away from the bottom wall, the second surface being flush with the third surface.
In some embodiments, the second surface is flush with the first surface.
In some embodiments, the bonding portions are a plurality of, the plurality of bonding portions being spaced apart along the first direction.
In some embodiments, the plurality of bonding portions are spaced apart along a second direction, the first direction intersecting the second direction.
In a second aspect, an embodiment of the present application further provides a display device, including a flexible display panel and a flexible cover plate according to any one of the foregoing embodiments, where the flexible cover plate is disposed on a light emitting surface side of the flexible display panel.
In a third aspect, an embodiment of the present application further provides a method for manufacturing a flexible cover plate, including:
providing a first material layer, wherein the first material layer comprises a first surface positioned on one side in the thickness direction of the first material layer and a containing groove formed by recessing the first surface;
filling an adhesive material in the accommodating groove, shaping the adhesive material to form an adhesive part, wherein the hardness parameter of part of the adhesive part is larger than that of the first material layer;
a hardened coating is formed on the first surface, and the hardened coating is connected to the bottom wall of the accommodating groove through an adhesive portion.
In some embodiments, filling the adhesive material in the accommodating groove and shaping the adhesive material to form the adhesive portion includes:
filling a second bonding material in the accommodating groove, and shaping the second bonding material to form a second bonding part;
and filling the first bonding material on the second bonding part, and shaping the first bonding material to form the first bonding part, wherein the hardness parameter of the first bonding part is larger than that of the second bonding part.
In some embodiments, filling the first bonding material on the second bonding material and shaping the first bonding material to form the first bonding portion includes: a gap exists between the shaped first bonding part and the side wall of the accommodating groove;
filling the holding groove with an adhesive material, setting the adhesive material to form an adhesive part, and further comprising:
and filling a third bonding material in a gap between the first bonding part and the side wall of the accommodating groove, and shaping the third bonding material to form a third bonding part, wherein the hardness parameter of the first bonding part is larger than that of the third bonding part.
The embodiment of the application provides a preparation method of flexible apron, display device and flexible apron, is provided with the holding tank on the supporting layer in the flexible apron, and the holding tank is embedded to have bonding portion, and bonding portion can improve the scratch resistance on flexible apron surface when realizing that holding tank diapire is connected with the hardening coating, improves the reliability of flexible apron.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
Fig. 1 is a schematic structural view of a flexible cover plate according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the structure at B-B in FIG. 1;
FIG. 3 is a schematic view of a support layer in a flexible cover plate according to another embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of FIG. 3 at C-C;
FIG. 5 is a schematic cross-sectional view of a further flexible cover plate according to an embodiment of the present application;
FIG. 6 is a schematic view of a support layer in a flexible cover plate according to an embodiment of the present disclosure;
fig. 7 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure;
FIG. 8 is a flowchart of a method for manufacturing a flexible cover plate according to an embodiment of the present application;
fig. 9a to 9c are schematic process diagrams of a method for manufacturing a flexible cover plate according to an embodiment of the present application;
FIG. 10 is a flowchart of a method for manufacturing a flexible cover plate according to an embodiment of the present disclosure;
fig. 11a to 11c are schematic process diagrams of a preparation method of another flexible cover plate according to an embodiment of the present application.
Marking:
1. a support layer; 11. a body portion; 111. a receiving groove; 1111. a bottom wall; 1112. a sidewall; 12. an adhesive part; 121. a first adhesive part; 122. a second adhesive portion; 123. a third adhesive part;
2. hardening the coating; 21. a first hardened portion; 211. a housing part; 22. a second hardening portion;
3. a flexible display panel;
a1, a first surface; a2, a second surface; a3, a third surface;
x, a first direction; y, second direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Foldable or rollable display devices have been developed to meet the needs of users for large screens, large fields of view, and portability. The display device is required to be continuously switched between a contracted state and a flat state when in use so as to meet the requirements of different situations such as display and carrying. The existing flexible cover plate is required to meet the need of curling or folding, so that the mechanical property of the existing flexible cover plate is usually low, the surface is easy to scratch, and the folding or curling service life of the product is low.
In order to solve the above-mentioned problems, referring to fig. 1 and 2, in one aspect, the present embodiment provides a flexible cover plate, including a support layer 1 and a hardened coating 2 that are stacked, the support layer 1 includes a body portion 11 and an adhesion portion 12, the body portion 11 includes a first surface A1 facing the hardened coating 2, and a receiving slot 111 formed by recessing the first surface A1 along a thickness direction of the flexible cover plate, the adhesion portion 12 is embedded in each receiving slot 111, a bottom wall 1111 of the receiving slot 111 is connected with the hardened coating 2 through the adhesion portion 12, and a hardness parameter of a portion of the adhesion portion 12 is greater than a hardness parameter of the body portion 11.
The flexible cover plate comprises a supporting layer 1 and a hardening coating 2, wherein the hardening coating 2 is arranged on the supporting layer 1, and the supporting layer 1 and the hardening coating 2 are transparent film layers. Wherein the supporting layer 1 is used for providing supporting function for the flexible cover plate, and the hardening coating 2 is used for improving the surface rigidity of the flexible cover plate. When the flexible cover plate is arranged on the flexible display panel 3 to form a display device, the supporting layer 1 is arranged adjacent to the flexible display panel 3, and light rays emitted by the flexible display panel 3 are emitted into the hardening coating 2 through the supporting layer 1 and then emitted out through the hardening coating 2 to form a corresponding display effect.
It will be appreciated that although the hardness of the stiffening coating 2 is greater than the hardness of the support layer 1, the scratch resistance of the flexible cover sheet may be improved to some extent. However, the thickness of the hardening coating 2 is generally thin, and in order to satisfy the curling or folding effect, the hardness parameter of the hardening coating 2 should not be too large, so that it is difficult to satisfy the scratch resistance requirement of the flexible cover plate simply by means of the hardening coating 2.
In order to improve the scratch resistance of the flexible cover plate, the structure of the supporting layer 1 is changed in the embodiment of the application, specifically: the support layer 1 includes a body portion 11 and an adhesive portion 12, and the body portion 11 may be made of colorless polyimide (Colorless Polyimide CPI). The body part 11 includes a first surface A1, which is a surface of the body part 11 in contact with the hardened coating 2, and a receiving groove 111 formed by recessing the first surface A1, and the hardened coating 2 may be directly formed on the first surface A1. The adhesive part 12 is arranged in the accommodating groove 111, the adhesive part 12 has certain viscosity, the connection between the bottom wall 1111 of the accommodating groove 111 and the hardening coating 2 can be realized, and meanwhile, the hardness of part of the adhesive part 12 is larger than that of the body part 11, so that the scratch resistance of the flexible cover plate at the corresponding position can be improved due to the existence of the adhesive part 12, and the reliability of the flexible cover plate is improved.
The number of the accommodating grooves 111 is plural and is set at intervals, that is, the main body 11 is provided between the adjacent bonding portions 12. The body part 11 between the adjacent bonding parts 12 can meet the curling or folding requirement of the flexible cover plate, so that the embodiment of the application can improve the scratch resistance of the flexible cover plate on the premise of meeting the curling or folding requirement. In addition, the present embodiment does not limit the number of shapes and arrangement of the adhesive portions 12.
Be provided with holding tank 111 on the supporting layer 1 in this embodiment, holding tank 111 is embedded to have bonding portion 12, and bonding portion 12 can improve the scratch resistance on flexible apron surface when realizing that holding tank 111 diapire 1111 is connected with hardening coating 2, improves flexible apron's reliability.
In some embodiments, referring to fig. 2, the bonding portion 12 includes a first bonding portion 121 and a second bonding portion 122 stacked in a thickness direction of the flexible cover plate, the first bonding portion 121 being connected to the bottom wall 1111 by the second bonding portion 122; wherein, the hardness parameter of the first bonding portion 121 is greater than the hardness parameter of the main body portion 11 and greater than the hardness parameter of the second bonding portion 122.
The first adhesive part 121 is adhered to the cured coating 2, and the second adhesive part 122 is adhered to the bottom wall 1111 of the housing groove 111. The first bonding part 121 is closer to the surface of the flexible cover plate than the second bonding part 122, and the hardness parameter is larger than that of the body part 11, so that the scratch resistance of the surface of the flexible cover plate can be improved; and the second bonding portion 122 is used for connecting the first bonding portion 121 and the bottom wall 1111, and the hardness parameter is smaller, and the existence of the second bonding portion 122 can play a role in slowing down the interaction force between the first bonding portion 121 and the bottom wall 1111 when the flexible cover plate is scratched, so as to reduce the risk of deformation of the accommodating groove 111 and improve the reliability of the flexible cover plate.
In some alternative embodiments, the hardness parameter of the second adhesive portion 122 is less than the hardness parameter of the body portion 11.
The second bonding portion 122 is used for buffering the interaction force between the first bonding portion 121 and the bottom wall 1111, and in order to enhance the buffering effect of the second bonding portion 122, in this embodiment of the present application, the hardness parameter of the second bonding portion 122 is set to be smaller than the hardness parameters of the body portion 11 and the first bonding portion 121 at the same time, so that the acting force generated by external scraping on the accommodating groove 111 is further buffered, and the risk of deformation of the accommodating groove is reduced. Alternatively, the second adhesive part 122 may employ a high-permeability flexible adhesive, and the first adhesive part 121 may include at least one of a thermosetting adhesive and a photosensitive adhesive (Ultraviolet Rays UV), and the second adhesive part 122 may include at least one of a pressure-sensitive adhesive (pressure sensitive adhesive PSA), a photosensitive adhesive, and an optical adhesive (Optical Clear Resin OCR).
The ratio of the internal components of the material such as the photosensitive paste determines the hardness parameter thereof, so that the hardness requirements of the first bonding portion 121 and the second bonding portion 122 can be satisfied by changing the ratio of the internal components of the material such as the photosensitive paste.
In some embodiments, referring to fig. 3 and 4, a gap is formed between the first adhesive portion 121 and the accommodating groove 111, the adhesive portion 12 further includes a third adhesive portion 123 disposed in the gap, the first adhesive portion 121 is connected to the sidewall 1112 through the third adhesive portion 123, and a hardness parameter of the first adhesive portion 121 is greater than a hardness parameter of the third adhesive portion 123.
The receiving groove 111 is formed by a side wall 1112 and a bottom wall 1111, and the side wall 1112 may be formed by a plurality of sub-walls connected end to end. The number of the sub-walls is determined according to practical situations, and the size and shape of the accommodating groove 111 are determined by the shape and height of the side wall 1112, which is not limited in the embodiment of the present application.
When the flexible cover plate is used, the scraping force applied to the flexible cover plate from the outside can be simultaneously influenced to the side wall 1112 and the bottom wall 1111 through the first bonding portion 121, so that the deformation risk of the accommodating groove 111 occurs. In order to reduce the influence on the side wall 1112 of the accommodating groove 111, in the embodiment of the application, the first bonding portion 121 and the side wall 1112 are arranged at intervals, and the third bonding portion 123 is filled between the first bonding portion 121 and the side wall 1112, and the hardness of the third bonding portion 123 is smaller than that of the first bonding portion 121, so that the buffering effect on the side wall 1112 is achieved.
In some alternative embodiments, the hardness parameter of the third adhesive portion 123 is less than the hardness parameter of the body portion 11.
It will be appreciated that the hardness parameter of the third bonding portion 123 is set to be smaller than the hardness parameter of the body portion 11 and the first bonding portion 121 at the same time, so that the acting force of external scraping on the accommodating groove 111 can be further buffered, and the risk of deformation thereof is reduced. The third bonding portion 123 and the second bonding portion 122 have similar actions and effects, so that they can be made of the same material, thereby reducing material cost; or the two materials can also be prepared respectively by adopting different materials, and the embodiment of the application is not limited to the above.
In some embodiments, the third adhesive part 123 is disposed around the outer circumferential side of the first adhesive part 121.
In the embodiment of the present application, the third bonding portion 123 is disposed around the outer periphery of the first bonding portion 121, that is, the orthographic projection of the third bonding portion 123 on the cured coating 2 is in a ring-shaped structure. This design can completely separate the first adhesive part 121 from the side wall 1112, avoiding contact between the first adhesive part 121 and the side wall 1112, thereby further improving the cushioning effect of the third adhesive part 123. Alternatively, the orthographic projection of the second adhesive part 122 on the hardened coating 2 covers the orthographic projection of the third adhesive part 123 on the hardened coating 2, i.e. the third adhesive part 123 is connected to the bottom wall 1111 by the second adhesive part 122. Alternatively, the orthographic projection of the third adhesive part 123 on the cured coating 2 surrounds the orthographic projection of the second adhesive part 122 on the cured coating 2, that is, the third adhesive part 123 surrounds both the first adhesive part 121 and the second adhesive part 122 and is directly connected to the bottom wall 1111.
In some embodiments, referring to fig. 5, the cured coating 2 includes a first cured portion 21 and a second cured portion 22, the first cured portion 21 includes a plurality of accommodating portions 211 spaced apart from each other, the second cured portion 22 is embedded in each of the accommodating portions 211 to form a film structure covering the supporting layer 1, and a hardness parameter of the second cured portion 22 is greater than a hardness parameter of the first cured portion 21.
The hardened coating 2 comprises a first hardened portion 21 and a second hardened portion 22 with different hardness, the first hardened portion 21 is provided with a receiving portion 211 for filling the second hardened portion 22, wherein the receiving portion 211 may or may not penetrate the first hardened portion 21. Meanwhile, when the accommodating portion 211 does not penetrate the first hardened portion 21, the accommodating portion 211 may be located on a side of the first hardened portion 21 away from the supporting layer 1, or may be located on a side of the first hardened layer close to the supporting layer 1.
In some embodiments, the orthographic projection of the third bond 123 on the hardened coating 2 at least partially overlaps the second hardened portion 22.
As can be seen from the foregoing, the third bonding portion 123 is disposed in the gap between the first bonding portion 121 and the sidewall 1112, and is used for buffering the interaction force therebetween, and the first bonding portion 121 has a larger hardness parameter, so that the scratch resistance at the corresponding region can be improved; and the third bonding portion 123 has weak scratch resistance due to a small hardness parameter.
In order to improve the scratch resistance of the area corresponding to the third bonding portion 123, the second hardening portion 22 is additionally provided, the second hardening portion 22 is located in the accommodating portion 211 of the first hardening portion 21, and the orthographic projection of the third bonding portion 123 on the hardened coating 2 at least partially overlaps with the second hardening portion 22, that is, the third bonding portion 123 at least partially corresponds to the second hardening portion 22.
It is understood that the first hardening portion 21 and the second hardening portion 22 each include a plurality of components, and the hardness of the first hardening portion 21 and the second hardening portion 22 can be adjusted by changing the types of the components and the ratio of the components in the first hardening portion 21 and the second hardening portion 22.
In some alternative embodiments, the orthographic projection of the third bond 123 on the hardened coating 2 is within the outer contour of the second hardened portion 22. The second hardening portion 22 may cover the third bonding portion 123, so that scratch resistance of the area where the third bonding portion 123 is located can be ensured. It can be understood that the first bonding portion 121 is provided with the first hardening portion 21 at a position corresponding to the first bonding portion 121, and the first bonding portion 121 is used for improving scratch resistance at the position corresponding to the first hardening portion 21.
In some embodiments, as shown in fig. 5, the orthographic projection of the third bonding part 123 on the hardened coating 2 at least partially overlaps the orthographic projection of the second bonding part 122 on the hardened coating 2, the receiving part 211 penetrates the hardened coating 2, and the second hardening part 22 is connected to the second bonding part 122 through the third bonding part 123.
In this embodiment of the present application, the first hardened portion 21 may be connected to the body portion 11 or the first bonding portion 121 with the supporting layer 1, and the second hardened portion 22 penetrates through the hardened coating 2, so in order to achieve connection between the second hardened portion 22 and the supporting layer 1 in the thickness direction, in this embodiment of the present application, the orthographic projection of the third bonding portion 123 on the hardened coating 2 and the orthographic projection of the second bonding portion 122 on the hardened coating 2 overlap at least partially, so that the second hardened portion 22 can be connected to the bottom wall 1111 through the third bonding portion 123 and the second bonding portion 122, so as to achieve connection to the supporting layer 1, and avoid the risk of relative displacement between the first hardened portion 21 and the second hardened portion 22 in the thickness direction.
In some embodiments, as shown in fig. 5, the first adhesive 121 includes a second surface A2 facing away from the bottom wall 1111 and the third adhesive 123 includes a third surface A3 facing away from the bottom wall 1111, the second surface A2 being flush with the third surface A3.
The hardening coating 2 is formed on the surface of the first bonding portion 121 and the third bonding portion 123 facing away from the bottom wall 1111, and in this embodiment of the present application, the second surface A2 and the third surface A3 are flush, so that the second surface A2 and the third surface A3 are located in the same plane, thereby being beneficial to the preparation of the hardening coating 2 on the second surface A2 and the third surface A3, and reducing the preparation difficulty.
In some embodiments, the second surface A2 is flush with the first surface A1.
The first surface A1, the second surface A2 and the third surface A3 are all flush, namely, the surface of the supporting layer 1 facing the hardening coating 2 is a flat surface, so that the preparation of the hardening coating 2 on the supporting layer 1 is further facilitated, meanwhile, the formation of the flat hardening coating 2 is facilitated, the surface of the whole flexible cover plate is smooth and flat, and the hand feeling of the end use is improved.
In some embodiments, as shown in fig. 3, the bonding portions 12 are plural, and the plural bonding portions 12 are arranged at intervals along the first direction X.
In this embodiment of the present application, the plurality of bonding portions 12 may be disposed in multiple segments, each bonding portion 12 may extend along the second direction Y, and the length of the bonding portion 12 in the second direction Y may be the same as the length of the flexible cover plate in the second direction Y. The first direction X and the second direction Y may be any direction parallel to the first surface A1, as long as the two directions intersect, which is not limited in the embodiment of the present application.
In some alternative embodiments, referring to fig. 6, the plurality of bonding portions 12 are spaced apart along the second direction Y, and the first direction X intersects the second direction Y.
In the embodiment of the present application, the plurality of bonding portions 12 are disposed at intervals along both the first direction X and the second direction Y, that is, the single bonding portion 12 has a block-shaped structure, and the plurality of bonding portions 12 are distributed in an array. The first direction X is perpendicular to the second direction Y, and the first direction X and the second direction Y are a length direction and a width direction of the flexible cover plate, respectively.
In a second aspect, referring to fig. 7, an embodiment of the present application provides a display device, including a flexible display panel 3 and a flexible cover plate according to any of the foregoing embodiments, where the flexible cover plate is disposed on a light-emitting surface side of the flexible display panel 3.
The display device provided in this embodiment of the present application has the beneficial effects of the flexible cover plate provided in this embodiment of the present application, and specific descriptions of the flexible cover plate in the foregoing embodiments may be referred to specifically, which is not described herein again.
In a third aspect, referring to fig. 8 and 9, an embodiment of the present application provides a method for manufacturing a flexible cover plate, including:
s100: a first material layer is provided, the first material layer including a first surface on one side in a thickness direction thereof and a receiving groove formed by recessing the first surface.
Referring to fig. 9a, in step S100, a first material layer is used to form a body portion 11 of a supporting layer, where the first material layer includes a plurality of receiving grooves 111, and the plurality of receiving grooves 111 are used to carry bonding portions formed later. It should be noted that in step S100, the first material layer needs to be shaped to fix the shape of the accommodating groove 111, where the preparation process of the first material layer is not limited in the embodiments of the present application. Alternatively, the first material layer may be formed by a process such as curing, and the receiving groove 111 may be formed by CNC machining.
In some alternative embodiments, the first material layer may be prepared by a process comprising: firstly, a special-shaped base is provided, wherein the special-shaped base comprises a square substrate and a plurality of protruding structures arranged on the upper surface of the square substrate. And then coating a first material on the surface of the special-shaped base platform, which is provided with the convex structure, and shaping the first material to form a first material layer, wherein the position corresponding to the convex structure is the position of the accommodating groove of the first material layer, and the size and shape of the convex structure determine the size and shape of the accommodating groove.
S110: filling the holding groove with an adhesive material, shaping the adhesive material to form an adhesive part, and making the hardness parameter of part of the adhesive part larger than that of the first material layer.
Referring to fig. 9b, in step S110, an adhesive material is used to form an adhesive portion 12, and the adhesive portion 12 is used to connect the bottom wall 1111 of the receiving groove 111 with a subsequently formed hardened coating. Meanwhile, the hardness parameter of part of the bonding part is larger than that of the first material layer, so that the hardness of the part of the flexible cover plate can be improved by forming the bonding part 12, and the scratch resistance of the flexible cover plate can be improved. The adhesive material may include a plurality of different materials, which are not limited in the embodiment of the present application.
S120: a hardened coating is formed on the first surface, and the hardened coating is connected with the bottom wall of the accommodating groove through the bonding part.
Referring to fig. 9c, in step S120, a hardened coating 2 is formed on the first surface A1, and the hardened coating 2 is formed to increase the strength of the flexible cover plate. Illustratively, the thickness of the stiffening coating 2 is 3 μm, which allows to increase the strength of the flexible cover sheet as much as possible while meeting the need for curling or folding the flexible cover sheet.
In some embodiments, referring to fig. 10 and 11, in step S110, the method includes:
s111: and filling the accommodating groove with a second bonding material, and shaping the second bonding material to form a second bonding part.
Referring to fig. 11a, in step S111, first, a second bonding portion 122 is formed in the accommodating groove 111, and the second bonding portion 122 is used to connect the bottom wall 1111 of the accommodating groove 111 and a first bonding portion formed subsequently. The hardness parameter of the second bonding portion is smaller, so that the formed second bonding portion 122 can play a role of buffering friction between the first bonding portion and the bottom wall 1111 of the accommodating groove 111, and the risk of deformation of the accommodating groove 111 is reduced. Optionally, the hardness parameter of the second adhesive portion is smaller than the hardness parameter of the first material layer.
S112: and filling the first bonding material on the second bonding part, and shaping the first bonding material to form the first bonding part, wherein the hardness parameter of the first bonding part is larger than that of the second bonding material.
Referring to fig. 11b, in step S112, a first adhesive material is used to form a first adhesive portion 121, and the hardness of the first adhesive portion is greater than that of the second adhesive portion and is also greater than the hardness parameter of the first material layer. The first adhesive part 121 can thus function to improve scratch resistance of the flexible cover plate, and improve strength of the flexible cover plate.
In some embodiments, as shown in fig. 11b, in step S112, it includes: a gap exists between the first bonding portion 121 after the shaping and the side wall 1112 of the accommodating groove 111, and the size of the gap can be determined according to the actual manufacturing situation, which is not limited in the embodiment of the present application.
As shown in fig. 10 and 11, in step S110, further includes:
s113: and filling a third bonding material in a gap between the first bonding part and the side wall of the accommodating groove, and shaping the third bonding material to form a third bonding part, wherein the hardness parameter of the first bonding part is larger than that of the third bonding part.
Referring to fig. 11c, in step S113, similar to the action of the second adhesive, the third adhesive 123 formed by the third adhesive is used to buffer the interaction force between the first adhesive 121 and the sidewall 1112, so as to reduce the risk of deformation of the accommodating groove 111. It is understood that the third adhesive material may be the same as the second adhesive material. Alternatively, the third adhesive portion 123 after the third adhesive material is shaped has a ring-like structure and is disposed around the first adhesive portion 121.
Although the embodiments disclosed in the present application are described above, the descriptions are merely embodiments adopted for the purpose of facilitating understanding of the present application, and are not intended to limit the present invention. Any person skilled in the art to which this application pertains will be able to make any modifications and variations in form and detail of implementation without departing from the spirit and scope of the disclosure, but the scope of protection of this application shall be subject to the scope of the claims that follow.
In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, substitution of other connection manners described above may refer to corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.
Claims (12)
1. The flexible cover plate is characterized by comprising a support layer and a hardening coating, wherein the support layer and the hardening coating are arranged in a stacked mode, the support layer comprises a body part and an adhesion part, the body part comprises a first surface facing the hardening coating, and a containing groove formed by the first surface in a recessed mode along the thickness direction of the flexible cover plate, the adhesion part is embedded in the containing groove, the bottom wall of the containing groove is connected with the hardening coating through the adhesion part, and the hardness parameter of part of the adhesion part is larger than that of the body part;
the bonding part comprises a first bonding part and a second bonding part which are stacked along the thickness direction of the flexible cover plate, and the first bonding part is connected with the bottom wall through the second bonding part;
wherein the hardness parameter of the first bonding part is greater than the hardness parameter of the body part and greater than the hardness parameter of the second bonding part;
a gap is formed between the first bonding part and the side wall of the accommodating groove, the bonding part further comprises a third bonding part arranged in the gap, the first bonding part is connected with the side wall through the third bonding part, and the hardness parameter of the first bonding part is larger than that of the third bonding part;
the hardness parameter of the third bonding part is smaller than that of the body part, and the third bonding part is arranged around the outer periphery of the first bonding part.
2. The flexible cover sheet of claim 1 wherein the hardness parameter of the second adhesive portion is less than the hardness parameter of the body portion.
3. The flexible cover sheet of claim 1, wherein the hardened coating comprises a first hardened portion and a second hardened portion, the first hardened portion comprising a plurality of spaced apart receiving portions, the second hardened portion being embedded within each of the receiving portions to form a film layer structure that covers the support layer, the second hardened portion having a hardness parameter that is greater than the hardness parameter of the first hardened portion.
4. A flexible cover sheet according to claim 3, wherein the orthographic projection of the third adhesive portion on the hardened coating at least partially overlaps the second hardened portion.
5. The flexible cover sheet of claim 4 wherein an orthographic projection of the third bond within the hardened coating is within an outer contour of the second hardened portion.
6. A flexible cover sheet according to claim 3, wherein the orthographic projection of the third adhesive portion on the hardened coating and the orthographic projection of the second adhesive portion on the hardened coating at least partially overlap, the receiving portion penetrates the hardened coating, the second adhesive portion is connected to the second adhesive portion by the third adhesive portion, and at least part of the first adhesive portion is connected to the second adhesive portion by the first adhesive portion.
7. The flexible cover sheet of claim 6 wherein the first adhesive portion includes a second surface facing away from the bottom wall and the third adhesive portion includes a third surface facing away from the bottom wall, the second surface being flush with the third surface.
8. The flexible cover sheet of claim 7 wherein the second surface is flush with the first surface.
9. The flexible cover sheet of claim 1, wherein the plurality of adhesive portions are spaced apart along the first direction.
10. The flexible cover sheet of claim 9 wherein a plurality of said adhesive segments are spaced apart along a second direction, said first direction intersecting said second direction.
11. A display device, comprising a flexible display panel and the flexible cover plate according to any one of claims 1 to 10, wherein the flexible cover plate is disposed on a light-emitting surface side of the flexible display panel.
12. A method of making a flexible cover sheet comprising:
providing a first material layer, wherein the first material layer comprises a first surface positioned on one side in the thickness direction of the first material layer and a containing groove formed by recessing the first surface;
filling a second bonding material in the accommodating groove, and shaping the second bonding material to form a second bonding part;
filling a first bonding material on the second bonding part, and shaping the first bonding material to form a first bonding part, wherein the hardness parameter of the first bonding part is larger than that of the second bonding part;
forming a hardening coating on the first surface, wherein the hardening coating is connected with the bottom wall of the accommodating groove through the first bonding part and the second bonding part;
the filling of the first adhesive material on the second adhesive material and the shaping of the first adhesive material to form a first adhesive part comprises: a gap exists between the first bonding part formed by shaping and the side wall of the accommodating groove;
filling a first bonding material on the second bonding part, shaping the first bonding material to form a first bonding part, and after the hardness parameter of the first bonding part is larger than that of the second bonding part, further comprising:
and filling a third bonding material in a gap between the first bonding part and the side wall of the accommodating groove, and shaping the third bonding material to form a third bonding part, wherein the hardness parameter of the first bonding part is larger than that of the third bonding part.
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| CN202210275767.XA CN114582239B (en) | 2022-03-21 | 2022-03-21 | Flexible cover plate, display device and preparation method of flexible cover plate |
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| CN202210275767.XA CN114582239B (en) | 2022-03-21 | 2022-03-21 | Flexible cover plate, display device and preparation method of flexible cover plate |
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| CN114582239B true CN114582239B (en) | 2023-12-19 |
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| CN115019660B (en) * | 2022-06-29 | 2023-12-01 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
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| CN114582239A (en) | 2022-06-03 |
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