CN-122024592-A - Cover plate, display device and preparation method of cover plate

CN122024592ACN 122024592 ACN122024592 ACN 122024592ACN-122024592-A

Abstract

The embodiment of the application provides a cover plate, a display device and a preparation method of the cover plate, wherein the preparation method of the cover plate comprises the steps of providing a supporting layer, coating an adhesive material on the surface of the supporting layer, performing semi-curing to form a semi-cured adhesive layer, providing a glass layer, adhering the glass layer on the semi-cured adhesive layer, coating a paint on one surface and the side surface of the glass layer, which are away from the semi-cured adhesive layer, curing the paint to form a first protective layer, completely curing the semi-cured adhesive layer to form a second protective layer, and removing the supporting layer to obtain the cover plate. The cover plate, the display device and the preparation method of the cover plate provided by the embodiment of the application can improve the mechanical property of the cover plate and the molding yield of the cover plate preparation.

Inventors

ZHANG YING
LEI YANG

Assignees

荣耀终端股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. A method of making a cover sheet comprising: Providing a support layer; coating an adhesive material on the surface of the supporting layer and performing semi-curing to form a semi-cured adhesive layer; providing a glass layer, and adhering the glass layer to the semi-solidified bonding layer; coating paint on one surface and the side surface of the glass layer, which are away from the semi-cured adhesive layer; Curing the paint to form a first protective layer, and completely curing the semi-cured bonding layer to form a second protective layer; And removing the supporting layer to obtain the cover plate.
2. The method of manufacturing a cover sheet according to claim 1, wherein after said curing the coating material to form a first protective layer and said semi-cured adhesive layer is completely cured to form a second protective layer, further comprising: Providing a functional layer, wherein the functional layer is arranged on one side of the first protective layer, which is away from the second protective layer, or the functional layer is arranged on one side of the second protective layer, which is away from the first protective layer.
3. The method of manufacturing a cover sheet according to claim 2, wherein the functional layer includes at least one of a hardened layer, an anti-reflection coating, an anti-glare coating, and an anti-fingerprint coating.
4. The method of manufacturing a cover sheet according to claim 1, further comprising, prior to said removing the support layer: Cutting the cured cover plate material, wherein the cover plate material comprises the supporting layer, the first protective layer, the glass layer and the second protective layer.
5. The method for manufacturing a cover plate according to claim 1, wherein the material of the supporting layer comprises at least one of polyethylene terephthalate film, polyimide film, polymethyl methacrylate film, and cellulose triacetate film; The thickness of the supporting layer is greater than or equal to 25 mu m.
6. The method of claim 1, wherein the glass layer comprises a central region and an edge region surrounding the central region, and the thickness of the edge region is smaller than the thickness of the central region.
7. The method for manufacturing a cover plate according to claim 1, wherein the glass layer is made of ultra-thin glass or microcrystalline ultra-thin glass; the Young's modulus of the glass layer is between 65GPa and 130 GPa.
8. The method according to claim 1, wherein the material of the first protective layer and the material of the second protective layer comprise at least one of silicone resins, epoxy resins, acrylic resins, polyurethane resins, silicone resins, polysilazane resins, polyimide resins, polycarbonates, polyesters, cellulose acetate resins; The thickness of the first protective layer and the thickness of the second protective layer are both 5-100 mu m; the Young's modulus of the first protective layer and the Young's modulus of the second protective layer are between 0.5MPa and 1500 MPa; the Young modulus of the semi-solidified bonding layer is smaller than that of the second protective layer, and the Young modulus of the semi-solidified bonding layer is between 0.01MPa and 1000 MPa; The elongation at break of the first protective layer and the second protective layer is greater than or equal to 5% at 25 ℃; the first protective layer and the second protective layer have an elongation at break of greater than or equal to 2% at minus 20 ℃.
9. A cover sheet, comprising: The glass layer comprises a first main surface, a second main surface and a plurality of side surfaces, wherein the first main surface and the second main surface are arranged in a way of deviating from each other along a first direction, and the side surfaces are connected with the first main surface and the second main surface, and the first direction is the thickness direction of the glass layer; A first protective layer covering and adhering to the first main surface and the plurality of side surfaces; a second protective layer covering and adhered to the second main surface and connected with the first protective layer; the second protective layer is for coating on a preparation support layer and for carrying the glass layer such that the first protective layer can be coated on the first major surface and a plurality of the sides of the glass layer.
10. A display device is characterized by comprising a display module and the cover plate of claim 9; the cover plate is arranged on one side of the display surface of the display module.

Description

Cover plate, display device and preparation method of cover plate Technical Field The embodiment of the application relates to the technical field of display screens, in particular to a cover plate, a display device and a preparation method of the cover plate. Background In recent years, foldable electronic devices have become a new trigger for the development of the electronic industry, and consumers have higher demands for the performances of light weight, high quality, and the like of the foldable electronic devices. The flexible screen of the foldable electronic device needs to adapt to repeated bending stress, so that permanent folds are easily generated on the flexible screen, and the visual experience and the service life of the product are seriously affected. To improve the folds, the cover plates of flexible screens of foldable electronic devices currently on the market use ultra-thin glass (ultra-THIN GLASS, UTG) as core material. The ultrathin glass has the problem of easy fracture and mechanical reliability, so that the ultrathin glass cannot be directly used as a cover plate of the outermost layer of the display device. In order to make ultra-thin glass applicable to the cover plate of flexible screen, it is necessary to protect the ultra-thin glass. In the related art, an organic protective material is generally coated on one side or both sides of ultra-thin glass to achieve the purpose of protection. However, the manner of coating the organic protective material on one or both sides of the ultra-thin glass may cause problems of low final molding yield of the cover plate and poor mechanical properties of the cover plate. Disclosure of Invention The embodiment of the application provides a cover plate, a display device and a preparation method of the cover plate, which can solve the problems of low final forming yield of the cover plate and poor mechanical property of the cover plate in the related technology. In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme: In a first aspect, an embodiment of the present application provides a method for manufacturing a cover plate, including: s100, providing a supporting layer. And S200, coating an adhesive material on the surface of the supporting layer and performing semi-curing to form a semi-cured adhesive layer. And S300, providing a glass layer, and adhering the glass layer to the semi-solidified bonding layer. And S400, coating paint on one surface and the side surface of the glass layer, which are away from the semi-cured adhesive layer. S500, curing the paint to form a first protective layer, and completely curing the semi-cured bonding layer to form a second protective layer. S800, removing the supporting layer to obtain the cover plate. According to the preparation method of the cover plate provided by the embodiment of the application, the glass layer can be wrapped in the first protective layer and the second protective layer, and the glass layer can be comprehensively protected. And when the glass layer deviates from one side of the semi-cured adhesive layer and the side surface is coated with the coating, the thickness and the coating position of the coating can be accurately controlled, and the problem of weak edge reliability of the cover plate can be solved by matching with the second protective layer, so that the mechanical property of the cover plate is improved. In addition, when the supporting layer is removed, a force can be applied to the second protective layer, and the whole cover plate can be peeled off from the supporting layer. The first protective layer and the glass layer can be prevented from being separated when the supporting layer is removed, or the first protective layer is broken, so that the preparation yield of the cover plate is improved. In addition, the preparation method of the cover plate provided by the embodiment of the application is simple and feasible, is beneficial to batch production of the cover plate and reduces the production period. In one possible implementation, after the coating is cured to form the first protection layer and the semi-cured bonding layer is completely cured to form the second protection layer, the method further comprises the step of providing a functional layer, wherein the functional layer is arranged on one side of the first protection layer, which is away from the second protection layer, or the functional layer is arranged on one side of the second protection layer, which is away from the first protection layer. The functional layer may implement additional functions required when the cover plate is applied to the foldable electronic device. Wherein the functional layer comprises at least one of a hardening layer, an anti-reflection coating, an anti-glare coating and an anti-fingerprint coating. In one possible embodiment, before the removing the supporting layer, the method further comprises S700, cutting the