CN109326220B - Cover plate and manufacturing method thereof, flexible display module and electronic equipment - Google Patents
Cover plate and manufacturing method thereof, flexible display module and electronic equipment Download PDFInfo
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- CN109326220B CN109326220B CN201811101653.3A CN201811101653A CN109326220B CN 109326220 B CN109326220 B CN 109326220B CN 201811101653 A CN201811101653 A CN 201811101653A CN 109326220 B CN109326220 B CN 109326220B
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- protrusion
- cover plate
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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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention provides a cover plate for a flexible screen, a manufacturing method of the cover plate, a flexible display module and electronic equipment, wherein the cover plate comprises: a substrate; a first clad layer covering the first surface of the substrate; the first bonding layer is used for bonding the first cladding layer to the substrate, and the first surface of the first bonding layer is provided with at least one first protrusion so as to form a hollow structure between the substrate and the first cladding layer. The cover plate can effectively improve the anti-fragmentation strength through the buffer action and the stress dispersion action of the protrusions.
Description
Technical Field
The invention relates to the technical field of display, in particular to a cover plate for a flexible screen, a manufacturing method of the cover plate, a flexible display module and electronic equipment.
Background
Electronic displays capable of bending deformation, also known as flexible displays, have been developed. In order to improve the surface hardness of a flexible display module consisting of a flexible screen and the like, a transparent hard film layer such as glass can be added into the display module, but the fragility of the display module is always a main problem which restricts the wide application.
Although some methods for enhancing the shatter resistance of the flexible display module have been proposed, none of these methods can improve the shatter resistance of the module, resulting in difficulty in mass use of the flexible screen.
Disclosure of Invention
In order to solve the above problems, the present invention provides a cover plate for a flexible screen, a method for manufacturing the cover plate, a flexible display module, and an electronic device, which can effectively improve the crack resistance of the flexible display module.
In one aspect, the present invention provides a cover plate for a flexible screen, comprising: a substrate; a first clad layer covering the first surface of the substrate; the first cladding is adhered to the substrate through the first adhesive layer, and the first surface of the first adhesive layer is provided with at least one first protrusion so as to form a hollow structure between the substrate and the first cladding.
According to a specific embodiment of the present invention, the first side of the first adhesive layer is the side facing the substrate.
According to a specific embodiment of the present invention, the cross-sectional shape of the first protrusion is circular, triangular, rectangular or diamond.
According to a specific embodiment of the present invention, the first protrusion has a cylindrical shape and has a diameter of 10 to 100 micrometers.
According to an embodiment of the present invention, the height of the first protrusion is 1/5 to 1/3 of the thickness of the first adhesive layer.
According to a specific embodiment of the present invention, the first protrusions are uniformly distributed on the first surface of the first adhesive layer.
According to a specific embodiment of the present invention, the cover plate further includes a second coating layer covering a second surface of the substrate opposite to the first surface, and a second adhesive layer adhering the second coating layer to the substrate, and a first surface of the second adhesive layer is provided with at least one second protrusion to form a hollow structure between the substrate and the second coating layer.
According to a specific embodiment of the present invention, the substrate is made of ultra-thin glass having a thickness of 300 μm or less, the first and second cover layers are each made of polyimide PI, and the first and second adhesive layers are each made of transparent optical cement OCA.
In another aspect, the invention provides a flexible display module, which includes the above cover plate and a flexible screen.
In another aspect, the present invention provides an electronic device, which includes a flexible display module, where the flexible display module includes the cover plate.
In another aspect, the present invention provides a method of manufacturing a cover plate for a flexible screen, including: manufacturing a first adhesive layer having at least one first protrusion on one surface; attaching a first coating layer to one surface of the first adhesive layer; and attaching the first surface of the substrate to the other surface of the first bonding layer to form a hollow structure between the substrate and the first coating.
According to a particular embodiment of the invention, a first adhesive layer having at least one first protrusion on one face is produced, comprising: manufacturing a mold for forming a first bonding layer with at least one first protrusion; the first adhesive layer is manufactured using a mold.
According to a particular embodiment of the invention, a first adhesive layer having at least one first protrusion on one face is produced, comprising: manufacturing a first bonding layer with at least one first bulge on the first surface; wherein, laminate the one side at first adhesive linkage with first cladding, include: attaching a first coating layer to a second surface of the first adhesive layer opposite to the first surface; wherein, laminate the another side at first adhesive linkage with the base plate, include: the substrate is attached to the first surface of the first adhesive layer.
According to a specific embodiment of the present invention, the method further comprises: attaching a protective film on the first surface of the first adhesive layer; the protective film is peeled off before the substrate is attached to the first surface of the first adhesive layer.
According to a specific embodiment of the present invention, the method further comprises: manufacturing a second adhesive layer having at least one second protrusion on one surface; attaching a second coating layer to one surface of the second adhesive layer; and attaching a second surface of the substrate, which is opposite to the first surface, to the other surface of the second bonding layer to form a hollow structure between the substrate and the second cladding layer.
The cover plate and the manufacturing method thereof according to the embodiment of the invention provide the bonding layer with the convex structure for bonding the substrate and the cladding layer, thereby forming the composite cover plate structure. The composite cover plate can disperse the stress of the base plate when the base plate is impacted and reduce the probability of the base plate cracking through the hollow structures between the convex structures, thereby effectively improving the crack resistance of the flexible screen, providing a buffer effect for the base plate, improving the shear resistance of the cover plate and improving the bending reliability.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1A is a schematic structural diagram of a cover plate according to an embodiment of the invention;
FIG. 1B shows a plan view of a first adhesive layer of a cover plate according to the embodiment of FIG. 1A;
FIG. 2 illustrates a plan view of a first adhesive layer of a cover plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a cover plate according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a flexible display module according to an embodiment of the invention;
fig. 5 shows a schematic flow diagram of a method for manufacturing a cover plate according to an embodiment of the invention.
Detailed Description
The present invention is described in detail below with reference to specific embodiments in order to make the concept and idea of the present invention more clearly understood by those skilled in the art. It is to be understood that the embodiments presented herein are only a few of all embodiments that the present invention may have. Those skilled in the art who review this disclosure will readily appreciate that many modifications, variations, or alterations to the described embodiments, either in whole or in part, are possible and within the scope of the invention as claimed.
Embodiments of the present invention provide a cover plate for a flexible screen, a method of manufacturing the same, a flexible display module using the cover plate, and an electronic device having the flexible display module using the cover plate. In the embodiments of the present invention, the electronic device may be a mobile phone, a computer, a tablet computer, an e-book reader, a digital television, or the like. In embodiments of the present invention, a flexible screen may refer to a deformable and bendable electronic display screen made of a flexible material, such as AMOLED. Types of flexible screens may include bendable (bendable) flexible screens, foldable (foldable) flexible screens, and rollable (rollable) flexible screens. The flexible screen which can be bent is also called a fixed curved screen, and the display screen is bent according to a fixed angle to form a curved surface shape. The foldable flexible screen can be repeatedly folded along one or more folding lines, and the using state can be changed in an infinite number of ways. The flexible screen that can be rolled up can be bent at any position on the surface of the entire display screen, and is the flexible screen with the highest degree of freedom of change. In each embodiment of the invention, the flexible screen and the cover plate form the flexible display module, and the cover plate is a protective structure on the outermost layer of the flexible display module. The flexible display module may refer to a structure capable of being directly connected to other components (e.g., a main board) of the electronic device without adding other electronic components. In the flexible display module, a polarizer, a touch panel, a flexible screen, a support film, etc. may also be disposed under the cover plate.
Fig. 1A is a schematic structural diagram of a cover plate 100 according to an embodiment of the invention. Fig. 1B illustrates a plan view of the first adhesive layer 130 of the cap plate 100 of the embodiment of fig. 1A.
In the present embodiment, the cover plate 100 includes: a substrate 110; a first clad layer 120, the first clad layer 120 covering the first surface 111 of the substrate 110; a first adhesive layer 130, the first clad layer 120 being adhered to the substrate 110 by the first adhesive layer 130, at least one first protrusion 131 being provided on a first surface of the first adhesive layer 130 to form a hollow structure 132 between the substrate 110 and the first clad layer 120.
The cover plate according to the embodiment is formed by compounding the substrate and the first coating layer, so that the cover plate can integrate the mechanical properties of the substrate and the coating layer, and has more comprehensive applicability. The base plate is connected with the first coating through the first bonding layer provided with the first protrusions, so that the first protrusions form a hollow structure, stress borne by the cover plate when the cover plate is impacted can be buffered, the probability of breakage of the base plate is reduced, the anti-shearing performance of the cover plate can be improved, and the bending reliability is improved.
In the present embodiment, the substrate 110 may refer to a structure that bears a main load of the cover plate 100 and plays a role of supporting as a main body of the cover plate 100. The material of the substrate 110 may be ultra-thin glass, PI (polyimide), PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), PU (polyurethane), or the like. In the present embodiment, the ultra-thin glass may refer to glass having a thickness of 300 μm or less. In one embodiment of the present invention, ultra-thin glass may refer to glass having a thickness of less than or equal to 50 microns. In one embodiment of the present invention, the substrate 110 is made of ultra-thin glass. The ultra-thin glass, which is used as a material of the substrate 110, has good thermal stability and chemical properties, good flexibility, visible light transmittance, water vapor and oxygen barrier properties, high surface smoothness and surface hardness, high scratch resistance, and is insulating. According to the embodiment of the invention, the bonding layer with the convex structure on the surface is attached to the upper surface and/or the lower surface of the ultrathin glass, so that the surface hardness of the composite cover plate can be enhanced, the stress borne by the ultrathin glass can be buffered when the cover plate is impacted, and the glass fragmentation probability is reduced.
In the present embodiment, the first clad layer 120 may refer to a layered structure covering the first surface 111 of the substrate 110. The first cladding layer 120 may be a planar structure, and may be made of PI, PMMA, PDMS (polydimethylsiloxane), or other materials. The provision of the first coating layer 120 can improve the fall resistance of the cap plate 100, and can improve the smoothness, strength, scratch resistance, oil resistance, and the like of the cap plate 100. In one embodiment of the present invention, the first cladding layer 120 is made of a PI material. The PI has good thermal stability, good mechanical property and chemical property.
In the present embodiment, the first surface 111 of the substrate 110 may be an upper surface of the substrate (as shown in fig. 1A) or a lower surface of the substrate (not shown). The first cladding layer 120 covers the first surface 111 of the substrate 110, which may mean that the first cladding layer 120 completely covers the substrate 110 over the entire area of the substrate 110, or that the first cladding layer 120 covers most of the area of the substrate 110.
In the present embodiment, the first adhesive layer 130 is an intermediate layer for connecting the cover and the substrate, and plays a role of adhesion. In the present embodiment, the first cladding layer 120 is adhered to the substrate 110 by the first adhesive layer 130, which may mean that the first adhesive layer 130 is sandwiched between the first cladding layer 120 and the substrate 110, and adheres the two together by its own adhesive force. In this embodiment, the material of the first adhesive layer 130 may be transparent optical adhesive oca (optical clear adhesive), solid transparent optical adhesive sca (solid optical clear adhesive), pressure sensitive adhesive psa (pressure sensitive adhesive), or optically transparent resin ocr (optical clear resin). According to this embodiment, through adhesive linkage laminating cladding and base plate, be favorable to improving the holistic structural integrity of apron, avoid causing defects such as split, stagger. According to an embodiment of the present invention, the first adhesive layer 130 is made of OCA glue. The OCA adhesive has the performances of high clarity, high light transmittance (total light transmittance is more than 99%), high adhesion, high weather resistance, water resistance, high temperature resistance, ultraviolet resistance and the like, has a controlled thickness, can provide uniform spacing, and does not cause yellowing (yellowing), peeling and deterioration after long-term use.
In the present embodiment, the first protrusion 131 of the first adhesive layer 130 may refer to an object extending beyond the surface height of the first adhesive layer to form a protrusion-like structure. In the present embodiment, the first protrusion 131 may have only one, for example, a strip-shaped protrusion extending along a curve and distributed on the entire surface of the first adhesive layer 130, or may have a plurality of, for example, a plurality of column-shaped protrusions dispersedly arranged on the entire surface of the first adhesive layer 130, and the embodiment of the present invention is not limited thereto, for example, the first protrusion 131 may also have a grid-shaped structure. In the present embodiment, the hollow structure 132 may refer to a gap formed between the first adhesive layer 130 and the substrate 110 or the first clad layer 120 due to the presence of the first protrusion 131. The hollow structures may be connected together in one piece (as shown in fig. 1B) or may be separated (as shown in fig. 2). In the present embodiment, the distribution of the hollow structures 132 on the plane may depend on the planar distribution of the first protrusions 131.
In the present embodiment, the first surface of the first adhesive layer 130 provided with the first protrusions 131 may be an upper surface (not shown) of the first adhesive layer, or may be a lower surface of the first adhesive layer (as shown in fig. 1A).
According to an embodiment of the present invention, the first surface of the first adhesive layer 130 is a surface facing the substrate 110. In this way, the first protrusions 131 directly contact the substrate 110, and the hollow structures between the first protrusions 131 also directly contact the substrate 110, so that the stress applied to the substrate 110 during collision or bending can be more fully dispersed. According to another embodiment of the invention, the first side of the first adhesive layer is the side facing away from the substrate. The first protrusions directly contact the first coating layer at this time, and also have the function of buffering and dispersing stress, thereby improving the crack resistance of the cap plate.
According to an embodiment of the present invention, the cross-section of the first protrusion 131 may have various shapes including a circle, a triangle, a rectangle, or a diamond. The longitudinal section of the first protrusion 131 may be trapezoidal, rectangular, or the like. For example, when the cross section of the first protrusion 131 is circular and the longitudinal section of the first protrusion 131 is trapezoidal, the first protrusion has a truncated cone shape, and when the cross section of the first protrusion 131 is circular and the longitudinal section of the first protrusion 131 is rectangular, the first protrusion has a cylindrical shape.
Referring to fig. 1B, according to an embodiment of the present invention, the first protrusion 131 has a cylindrical shape and has a diameter of 10 to 100 micrometers. The first protrusions 131 having a cylindrical shape can effectively increase the bonding area of the side of the first adhesive layer 130 having the protrusions, thereby improving the bonding firmness. Cylindrical protrusions having a diameter between 10 and 100 microns ensure both a sufficiently large bonding area and a sufficiently large gap between the protrusions to provide effective cushioning.
According to an embodiment of the present invention, the height of the first protrusion 131 is 1/5 to 1/3 of the thickness of the first adhesive layer 130. In the present embodiment, the thickness of the first adhesive layer 130 is the distance between the substrate 110 and the first clad layer 120, that is, the maximum thickness from the bottom surface of the first adhesive layer 130 to the top surface of the protrusion. When the height of the protrusion is 1/5 to 1/3 of the thickness of the bonding layer, the protrusion can not only provide effective buffer effect for the cover plate 100, but also ensure a certain supporting capability of the protrusion, so as to prevent the cover layer or the substrate from collapsing or unevenness caused by insufficient structural strength of the bonding layer with the protrusion.
According to an embodiment of the present invention, the first protrusions 131 are uniformly distributed on the first surface of the first adhesive layer 130. In this embodiment, the uniform distribution may mean that the number of the first protrusions in a unit area is equal or substantially equal, or that the sum of the planar areas occupied by the first protrusions in a unit area is equal or substantially equal. The bulges are uniformly distributed on the bonding layer, so that the uniformity of the bonding effect and the buffering effect is favorably kept, and the stress concentration or uneven surface caused by nonuniform structure is avoided.
Fig. 2 illustrates a plan view of the first adhesive layer 230 of the cap plate according to an embodiment of the present invention. The first adhesive layer 230 may be an example of the first adhesive layer 130 of the embodiment of fig. 1A. In the present embodiment, the first adhesive layer 230 is provided with the first protrusions 231 in a grid shape. At this time, the first protrusions 231 form discrete, rectangular hollow structures 232 therebetween. The first grid-shaped bulges form a discrete hollow structure similar to a closed air bag, and can independently bear impact and absorb stress, so that a more remarkable buffering effect is provided.
Fig. 3 shows a schematic structural diagram of a cover plate 300 according to an embodiment of the invention. The cover plate 300 according to the present embodiment may be one example of the cover plate 100 of the embodiment of fig. 1A.
In the present embodiment, in addition to the substrate 310, the first clad layer 320, and the first adhesive layer 330, the cap plate 300 further includes a second clad layer 340 and a second adhesive layer 350, the second clad layer 340 is covered on a second surface 312 of the substrate 310 opposite to the first surface 311, the second adhesive layer 330 adheres the second clad layer 340 to the substrate 310, and at least one second protrusion 351 is provided on a first surface of the second adhesive layer 350 to form a hollow structure between the substrate 310 and the second clad layer 340.
In this embodiment, the second cladding layer 340 is substantially identical to the first cladding layer 320 in other respects, including structure and material, except for the location. The second adhesive layer 350 is substantially the same as the first adhesive layer 330 except for its position and orientation. Second protrusions 351 have substantially the same structure as first protrusions 331. In the present embodiment, the second surface 312 opposite to the first surface 311 may be an upper surface (not shown) of the substrate 310, or may be a lower surface (shown in fig. 3) of the substrate 310. The cover plate 300 according to the present embodiment has upper and lower coatings, which can provide more overall protection and support for the substrate 310, and can more fully disperse the stress generated by the substrate 310 when the substrate 310 is impacted, and there are more protrusions and gaps to provide a buffer effect for the substrate 210.
It is to be understood that the second adhesive layer 350 may also be structurally different from the first adhesive layer 330, for example, when the protrusions on the first adhesive layer 330 are discrete protrusions, the protrusions on the second adhesive layer 350 may be grid-like protrusions. According to the embodiment of the invention, different shape structures can be arranged for the two bonding layers according to different mechanical properties of the positions of the two bonding layers, so that the overall mechanical property of the cover plate is optimal. For example, when the flexible screen is often bent inward, the upper surface of the substrate is often subjected to compressive stress and the lower surface is often subjected to tensile stress. At this time, the adhesive layer on the upper surface may be provided with smaller protrusions and larger hollow structures so as to be more suitable for being subjected to compression, and the adhesive layer on the lower surface may be provided with larger protrusions and smaller hollow structures so as to be more suitable for being subjected to stretching.
Fig. 4 is a schematic structural diagram of a flexible display module 400 according to an embodiment of the invention.
The flexible display module 400 of fig. 4 includes a cover plate 410 and a flexible screen 420. The flexible screen 420 is disposed under the cover plate 410. For example, the flexible display module 400 may include a polarizer, a touch panel, a support film, foam, and other module structures besides the cover 410 and the flexible screen 420. Of course, the flexible display module according to the embodiment of the invention is not limited to the above module structure.
According to the flexible display module of this embodiment, the first bonding layer of the first protrusion is arranged between the substrate of the cover plate and the first coating layer, so that the hollow structure is formed between the first protrusions, the stress borne by the cover plate when the cover plate is impacted can be buffered, the probability of substrate fracture is reduced, the anti-shearing performance of the cover plate can be improved, the bending reliability is improved, and the anti-cracking performance and the service life of the flexible display module are improved.
Embodiments of the present invention also provide an electronic device including the flexible screen of the embodiment of fig. 4.
Fig. 5 illustrates a method of manufacturing a cover plate for a flexible screen according to an embodiment of the present invention. The method of fig. 4 may be used to prepare the cover plate described in the above embodiments, and a detailed description is appropriately omitted. The method comprises the following steps:
510. manufacturing a first adhesive layer having at least one first protrusion on one surface;
520. attaching a first coating layer to one surface of the first adhesive layer;
530. and attaching the first surface of the substrate to the other surface of the first bonding layer to form a hollow structure between the substrate and the first coating.
In this embodiment, the first adhesive layer and the protrusions formed thereon may be formed by a mold, or by machining protrusions on the surface of a previously formed planar adhesive layer. In this embodiment, the one side and the other side of the first adhesive layer may refer to opposite sides of the first adhesive layer. For details of the substrate, the first cover layer, the first adhesive layer, and the first bump in the present embodiment, see the above description. According to the cover plate manufacturing method of the present embodiment, the bump structure for dispersing stress and providing cushioning can be manufactured for improving the strength and the falling resistance of the substrate.
According to an embodiment of the present invention, 510 includes:
manufacturing a mold for forming a first bonding layer with the first protrusion;
the first adhesive layer is manufactured using a mold.
In this embodiment, the mold may refer to a molding tool capable of molding the first adhesive layer by injection molding, extrusion, or the like. The mold may be made of metal or other high temperature resistant material. The mode of making the mould can be casting or machining. The first adhesive layer manufactured by the die can be the first adhesive layer which is finally used, can also be a semi-finished product of the first adhesive layer, and can be finally formed only by processing in other modes. According to the manufacturing method of the cover plate, the first bonding layer is manufactured through the mold, so that the first bonding layer can be manufactured efficiently and quickly, and meanwhile, the stability of the shape and the structure of the first bonding layer is guaranteed.
According to an embodiment of the present invention, 510 includes: and manufacturing a first bonding layer with the first protrusion on the first surface. 520 includes: and attaching the first coating layer to a second surface, opposite to the first surface, of the first adhesive layer. 530 includes: the substrate is attached to the first surface of the first adhesive layer. In this embodiment, the first bump is directly attached to the substrate, so that the first bump can more directly provide the substrate with the functions of stress dispersion and buffering.
According to an embodiment of the present invention, the cover plate manufacturing method further includes:
attaching a protective film on the first surface of the first adhesive layer;
the protective film is peeled off before the substrate is attached to the first surface of the first adhesive layer.
In this embodiment, attaching the protective film to the first surface of the adhesive layer is advantageous in maintaining the adhesiveness of the first surface from being impaired or even lost during storage and transportation of the adhesive layer. Because the first surface of the adhesive layer is provided with the first bulge, the attaching performance of the protective film can ensure that the bulge structure is not damaged when the protective film is torn off. For example, the first surface is used as a heavy-lift-off surface, and a surface of the protective film that is relatively easy to tear is attached to the first surface of the adhesive layer. In another embodiment of the present invention, a protective film may also be attached to the second surface of the adhesive layer. In this case, the second surface may be a light release surface and may be attached to the second surface of the adhesive layer with a surface of the protective film that is relatively difficult to tear.
According to an embodiment of the present invention, the cover plate manufacturing method further includes:
manufacturing a second adhesive layer having at least one second protrusion on one surface;
attaching a second coating layer to one surface of the second adhesive layer;
and attaching a second surface of the substrate, which is opposite to the first surface, to the other surface of the second bonding layer to form a hollow structure between the substrate and the second cladding layer.
The manufacturing method according to the present embodiment attaches the coatings on both surfaces of the substrate, and both the coatings are bonded by the adhesive layer provided with the protrusions. Thus, the substrate can be protected more completely, the stress of the substrate when the substrate is impacted can be dispersed more sufficiently, and a more effective buffer effect can be provided for the substrate.
The concepts, principles and concepts of the invention have been described above in detail in connection with specific embodiments. It will be appreciated by persons skilled in the art that embodiments of the invention are not limited to the specific forms disclosed above, and that many modifications, alterations and equivalents of the steps, methods, apparatus and components described in the above embodiments may be made by those skilled in the art after reading this specification, and that such modifications, alterations and equivalents are to be considered as falling within the scope of the invention. The scope of the invention is only limited by the claims.
Claims (15)
1. A cover plate for a flexible screen, comprising:
a substrate;
a first cladding layer overlying the first surface of the substrate;
a first adhesive layer through which the first clad layer is adhered to the substrate, at least one first protrusion being provided on a first surface of the first adhesive layer to form a hollow structure between the substrate and the first clad layer,
wherein the first protrusion is an object extending beyond the surface height of the first adhesive layer to form a protrusion-like structure.
2. The patch according to claim 1, wherein the first side of the first adhesive layer is the side facing the substrate.
3. The decking of claim 1, wherein the first projections have a cross-sectional shape that is circular, triangular, rectangular or diamond.
4. The cap plate of claim 1, wherein the first protrusions have a cylindrical shape and have a diameter of 10 to 100 micrometers.
5. The cover sheet as claimed in claim 1, wherein the height of the first protrusions is 1/5 to 1/3 of the thickness of the first adhesive layer.
6. The cap plate according to claim 1, wherein when the number of the first protrusions is plural, the first protrusions are uniformly distributed on the first face of the first adhesive layer.
7. The cover sheet according to any one of claims 1 to 6, further comprising a second coating layer covering a second surface of the base sheet opposite to the first surface, and a second adhesive layer adhering the second coating layer to the base sheet, the second adhesive layer being provided on a first surface thereof with at least one second protrusion to form a hollow structure between the base sheet and the second coating layer.
8. The cover sheet of claim 7, wherein the substrate is made of ultra-thin glass having a thickness of 300 microns or less, the first and second cover layers are each made of polyimide, and the first and second adhesive layers are each made of transparent optical glue.
9. The utility model provides a flexible display module assembly which characterized in that includes:
the cover sheet according to any one of claims 1 to 8;
a flexible screen.
10. An electronic device comprising a flexible display module, the flexible display module comprising the cover sheet according to any one of claims 1 to 8.
11. A method of manufacturing a cover plate for a flexible screen, comprising:
manufacturing a first adhesive layer having at least one first protrusion on one surface;
attaching a first coating layer to one surface of the first adhesive layer;
attaching a first surface of a substrate to the other surface of the first adhesive layer to form a hollow structure between the substrate and the first clad layer,
wherein the first protrusion is an object extending beyond the surface height of the first adhesive layer to form a protrusion-like structure.
12. The method of claim 11, wherein fabricating a first adhesive layer having at least one first protrusion on one side comprises:
manufacturing a mold for forming the first adhesive layer with the first protrusion;
and manufacturing the first bonding layer by using the mold.
13. The method of claim 11, wherein fabricating a first adhesive layer having at least one first protrusion on one side comprises:
manufacturing the first bonding layer with the first protrusion on the first surface;
wherein, said laminating first cladding on one side of first adhesive linkage includes:
attaching the first cover layer to a second surface of the first adhesive layer opposite to the first surface;
wherein attaching a substrate to the other surface of the first adhesive layer includes:
and attaching the substrate to the first surface of the first adhesive layer.
14. The method of claim 13, further comprising:
attaching a protective film on the first surface of the first adhesive layer;
before the substrate is attached to the first surface of the first adhesive layer, the protective film is torn off.
15. The method of claim 11, further comprising:
manufacturing a second adhesive layer having at least one second protrusion on one surface;
attaching a second coating layer to one surface of the second adhesive layer;
and attaching a second surface of the substrate opposite to the first surface to the other surface of the second adhesive layer to form a hollow structure between the substrate and the second cladding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101653.3A CN109326220B (en) | 2018-09-20 | 2018-09-20 | Cover plate and manufacturing method thereof, flexible display module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101653.3A CN109326220B (en) | 2018-09-20 | 2018-09-20 | Cover plate and manufacturing method thereof, flexible display module and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN109326220A CN109326220A (en) | 2019-02-12 |
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