CN113183550A - Optical compensation foldable glass composite cover plate and preparation method and application thereof - Google Patents
Optical compensation foldable glass composite cover plate and preparation method and application thereof Download PDFInfo
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- CN113183550A CN113183550A CN202110463714.6A CN202110463714A CN113183550A CN 113183550 A CN113183550 A CN 113183550A CN 202110463714 A CN202110463714 A CN 202110463714A CN 113183550 A CN113183550 A CN 113183550A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000011368 organic material Substances 0.000 claims description 8
- 229910010272 inorganic material Inorganic materials 0.000 claims description 7
- 239000011147 inorganic material Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
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- 239000002994 raw material Substances 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
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- 239000007822 coupling agent Substances 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical group [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
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- 230000002708 enhancing effect Effects 0.000 abstract description 2
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- 229920001721 polyimide Polymers 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
-
- 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Ceramic Engineering (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Compared with the prior art, the invention uses optical compensation material to coat the surface of the area thinning foldable glass to form an optical compensation filling layer to obtain the composite cover plate, which can compensate the thickness difference caused by the area thinning and the light and shadow difference caused by the area thinning thickness difference. Further enhancing the impact resistance of the foldable glass in the thinned regions while maintaining the folding capabilities of the thinned regions and the high impact strength advantages of the non-folded regions. The optical compensation filling layer meets the use specifications of electronic display products, including the requirements of optics, adhesive force, reliability and the like; and the impact resistance is obviously improved; in particular, the unfolded regions have the impact strength of conventional glass cover sheets and have a lower fold radius than conventional ultra-thin glass and OCA, CPI/PET conformable cover sheets.
Description
Technical Field
The invention belongs to the field of display screens, and particularly relates to an optical compensation foldable glass composite cover plate and a preparation method and application thereof.
Background
Foldable form consumer electronics products have since their arrival at the business, and there has been a continuing search for foldable product structures. Foldable cover plate materials are currently mature and adopt colorless transparent polyimide film (CPI), but have serious crease problems. The rigidity of the glass cover plate can well improve the problems. And when the thickness of the Glass is less than 0.1mm, namely Ultra-Thin Glass (UTG), the Ultra-Thin Glass has excellent foldability and high-hardness scratch resistance, and becomes a material which is important in the field of foldable flexible cover plates after CPI film materials.
The existing UTG product, although having a thickness of less than 0.1mm, has good folding performance and shows a tendency that the folding radius is smaller as UTG is thinner. However, UTG is thinner, the impact resistance is worse, the risk of cracking is higher, the impact strength is usually 2cm or less, and the use condition of the end product cannot be satisfied.
For UTG application on folding products such as mobile phones and pads, UTG is often required to have better folding performance and smaller folding radius at the folding position of the products; meanwhile, the non-folding area has better impact resistance. The conventional UTG product has low folding ability and cannot achieve a small folding radius while satisfying high impact resistance and excellent scratch resistance.
On the basis, a region thinning foldable glass form is proposed, as shown in fig. 1, the folding region is reduced to the thickness of less than 0.1mm by a region thinning method and has folding capacity; the non-folded region retains an original sheet thickness of more than 0.1mm, does not have folding ability but has high impact strength. However, in this form, the folding area and the non-folding area have a thickness difference, so that the impact strength of the folding area is greatly reduced, and the use of the foldable glass in this form is greatly limited due to factors such as a difference in light and shadow caused by the thickness difference.
Disclosure of Invention
The invention aims to provide an optical compensation foldable glass composite cover plate, wherein the surface of a region thinned foldable glass is provided with an optical compensation filling layer, the thickness difference between a folding region and a non-folding region is filled, and the optical compensation foldable glass composite cover plate not only has excellent folding capability, but also meets the overall thickness and optical requirements.
Another objective of the present invention is to provide a method for manufacturing an optical compensation foldable glass composite cover plate, in which an optical compensation material is coated on a folding area of an area thinned foldable glass, so as to fill an area thinned thickness difference, eliminate a light and shadow difference caused by the area thinned thickness difference, and simultaneously enhance an impact resistance of the thinned area glass.
It is a further object of the present invention to provide a use of an optically compensated foldable glass composite cover plate for making a display screen, particularly for a foldable display screen.
The specific technical scheme of the invention is as follows:
a preparation method of an optical compensation foldable glass composite cover plate comprises the following steps:
and coating an optical compensation material on the surface of the region thinning foldable glass, and curing.
The optical compensation material is coated on the grooved surface of the area thinning foldable glass, namely, on one side of the area thinning.
The foldable glass is thinned in the area, the thickness of the non-folding area is 0.1-1.0mm, the thickness of the folding area is 0.03-0.1mm, and when the thickness of the non-folding area is 0.1mm, the thickness of the folding area is less than 0.1 mm. The area thinning foldable glass stock and the size are not limited.
The folding zone folding diameter of the zone thinned foldable glass is 0.5-5.0 mm.
The processing mode of the region thinning foldable glass comprises but is not limited to physically or chemically performing region thinning to the target plate thickness of the folding region, and performing edge treatment and surface strength treatment, and can be obtained according to the conventional method.
The optical compensation material comprises an organic material, an inorganic material, a curing agent, a flatting agent and an adhesion promoter, and is prepared by mixing the above raw materials.
The optical compensation material has better processability, and can be processed and coated on the surface of the area thinning foldable glass by one or more means of blade coating or slit coating and the like;
the organic material includes but is not limited to acrylic glue, soluble PI slurry (polyimide slurry), epoxy resin, silica gel, polyurethane or polycarbonate transparent coating; the organic material in the optical compensation material has the characteristics of high transparency, good adhesion with glass and OCA glue, folding resistance and the like;
the inorganic material is a high-refractive-index metal oxide, preferably CaO or TiO2；
Preferably, the optical compensation material comprises the following raw materials in percentage by mass: 70-75% of organic material, 12-17% of inorganic material, 1-9% of flatting agent, 1-10% of curing agent and 0.1-2% of adhesion promoter; the total amount of the raw materials is 100 percent.
The viscosity of the optical compensation material is 10-10000 cps.
The curing agent comprises but is not limited to aliphatic amine curing agent, and the mass content ratio is 1-10%;
the leveling agent comprises but is not limited to acrylic leveling agent, organic silicon leveling agent or fluorocarbon leveling agent, and the mass content is 0.1-1%;
the adhesion promoter is a siloxane coupling agent, and comprises but is not limited to vinyl triethoxysilane or triethoxysilane, and the mass content is 0.1-2%;
the thickness of the wet film layer of the optical compensation material obtained by coating is 0.01-1.02 mm; after the optical compensation material is coated, the thickness difference between the folding area and the non-folding area is filled, the optical compensation material layer prepared on the surface of the foldable glass thinned in the area is a uniform plane, the thickness of a dry film of the coated optical compensation material in the non-folding area is 0.01-0.05 mm, and the thickness uniformity of a final product is within 0.005 mm.
The optical refractive index of the optical compensation material can be adjusted by the organic and inorganic materials cooperatively so as to match the refractive index of the glass material, and preferably, the refractive index of the optical compensation material of the invention is 1.4-1.6.
The surface of the coated optical compensation material is uniform and flat, an optical compensation filling layer is formed after curing, the refractive index is adjusted through the cooperation of organic and inorganic materials of the hybrid material, and the optical compensation material has the refractive index consistent with that of glass;
the refractive index matching of the optical compensation filling layer can eliminate the difference of light and shadow caused by thinning of the area;
the optical compensation filling layer comprises but is not limited to one or more of the optical compensation materials;
further, the optical compensation filling layer is one or more layers; after each layer is coated, the layer is scraped and cured and then coated.
The optical compensation filling layer is made of organic component materials which have certain flexibility after being cured and can resist folding conditions.
The curing means that the area thinned foldable glass coated with the optical compensation material is sent into a vacuum baking box body, the baking temperature is 50-300 ℃, and the baking time is 10-240 min;
according to the invention, through a coating process, optical material filling processing is carried out on the surface of the regional thinned foldable glass, the optical compensation layer can fill the thickness difference caused by regional thinning, the light and shadow difference caused by regional thinning is eliminated, the impact resistance of the foldable region can be improved, meanwhile, the loss of the folding capability is reduced to the maximum extent, and the use requirement of the foldable cover plate is met.
The optical compensation foldable glass composite cover plate is prepared by the method, and comprises area thinning foldable glass, wherein an optical compensation filling layer is arranged on the area thinning foldable glass. The thickness difference between the folding area and the non-folding area of the area thinning foldable glass is filled up by the optical compensation filling layer, the optical compensation filling layer has a certain thickness in the non-folding area, the thickness is 0.01-0.05 mm, and the thickness uniformity of a final product is within 0.005 mm.
The glass used by the foldable glass composite cover plate is area thinned glass, and the thinned area has excellent folding capability. The external dimensions of the foldable glass of the present invention are not limited, and include, but are not limited to, cover glasses for foldable display devices such as foldable mobile phones and foldable notebook computers. The optical compensation filling layer is obtained by coating, processing and curing an optical compensation material which is a liquid optical material, has proper processing characteristics and can meet the optical, reliability and folding capability characteristics of the display cover plate. The optical compensation foldable glass composite cover plate is obtained by filling and processing the surface of the foldable glass thinned in the area through the method in a specific process, so that the overall thickness and the optical requirements are met.
The invention provides application of an optical compensation foldable glass composite cover plate, which is used for manufacturing a display screen, and is preferably used for manufacturing a foldable display screen.
Compared with the prior art, the foldable glass surface is thinned by coating the area with the optical compensation material, the optical compensation filling layer is formed to obtain the composite cover plate, the thickness section difference caused by the area thinning can be complemented, and the light and shadow difference caused by the area thinning thickness difference can be complemented. Further enhancing the impact resistance of the foldable glass in the thinned regions while maintaining the folding capabilities of the thinned regions and the high impact strength advantages of the non-folded regions. The optical compensation filling layer meets the use specifications of electronic display products, including the requirements of optics, adhesive force, reliability and the like; and the impact resistance is obviously improved; the resulting product has superior impact resistance to conventional ultra-thin glass, especially impact strength of conventional glass cover sheets in the unfolded regions, and has a lower fold radius than conventional ultra-thin glass with OCA, CPI/PET conformable cover sheets.
Drawings
FIG. 1 is a cross-sectional view of a zone thinned foldable glass form;
FIG. 2 is a cross-sectional view of an optically compensated foldable glass composite cover plate in accordance with the present invention;
FIG. 3 is a schematic flow chart of the preparation method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
Example 1
A preparation method of an optical compensation foldable glass composite cover plate comprises the following steps:
1) conveying the area thinning foldable glass substrate with the specification and size to be produced into a continuous rolling brush cleaning machine for cleaning; the thickness of the non-folding area of the used area thinned foldable glass substrate is 0.1mm, and the thickness of the folding area is 0.06 mm; the folding radius of the folding area is 3 mm;
2) loading the cleaned glass substrate onto a coating platform;
3) configuring an optical compensation material: comprises an organic component of acrylic adhesive with the mass percent of 74 percent and an inorganic component of TiO215% of leveling agent, 7% of polyether modified polysiloxane material, 2% of curing agent, 2% of triallylamine and 2% of adhesion promoter, stirring and defoaming the materials to obtain an optical compensation material, wherein the refractive index of the optical compensation material is 1.46, the solid content of the optical compensation material is 99.9%, the viscosity of the optical compensation material is 10000cps, and the optical compensation material is dripped to the surface of the groove side of the thinned foldable glass substrate in the area to be coated and uniformly coated on the surface of the glass substrate; the running speed of the scraper is 100mm/s, the thickness of a coating wet film of the optical compensation material is controlled to be 0.5mm by the aid of a scraper gap, the running flatness of the scraper is less than 0.002mm, and the flatness of a coating platform is less than 0.002 mm.
4) The glass substrate coated with the hybrid material enters a vacuum baking box body along with a coating platform, the baking temperature is 120 ℃, and the baking time is 60 min;
5) taking off the baked glass substrate, and inspecting;
the thickness uniformity of the product is within 0.005 mm.
In the foldable optical compensation glass cover plate obtained in the embodiment, the thickness of a dry film layer of an optical compensation material coated on the foldable glass cover plate is 0.01mm in a non-folding area, the thickness difference between the whole thickness of the folding area and the whole thickness of the non-folding area is less than 0.002mm, the transmittance is 92.9%, the haze is 0.05%, the YI value is 1.4, the adhesion of the optical compensation filling material is 5B, the boiling range is not less than 4B, and no light and shadow difference exists when the optical compensation material is observed at angles of 90 °, 60/120 ° and 30/150 °, so that the requirement of optical compensation is met.
The impact strength of the folding area of the optical compensation foldable glass composite cover plate obtained in the embodiment is 36cm, the impact strength of the non-folding area is more than 100cm, and the optical compensation foldable glass composite cover plate is substantially improved compared with the impact strength of the ultrathin flexible foldable glass which is less than 2 cm. The detection standard is an industry standard, the test method is that 0.05mm OCA and 0.075mm PET are attached to the lower surface of a cover plate, a pen with 12.8g of a pen point and the diameter of 0.5mm is used for falling the pen point on the cover plate at a certain height, and the impact strength is defined by the broken height of cover plate glass.
According to the invention, the coating process is adopted, and the optical compensation material is coated and filled on the surface of the area thinning foldable glass, so that the effect of filling the area thinning thickness difference is achieved, the light and shadow difference caused by the area thinning thickness difference can be eliminated, and the impact resistance of the thinning area glass is synchronously enhanced. Compared with the conventional ultrathin glass product, the optical compensation foldable glass composite cover plate disclosed by the invention has stronger impact resistance and more excellent folding performance.
Claims (10)
1. A preparation method of an optical compensation foldable glass composite cover plate is characterized by comprising the following steps:
and coating an optical compensation material on the surface of the region thinning foldable glass, and curing.
2. The preparation method of claim 1, wherein the optical compensation material comprises the following raw materials in percentage by mass: 70-75% of organic material, 12-17% of inorganic material, 1-9% of flatting agent, 1-10% of curing agent and 0.1-2% of adhesion promoter; the total amount of the raw materials is 100 percent.
3. The method of claim 2, wherein the organic material includes but is not limited to acrylic glue, soluble PI paste, epoxy, silicone, polyurethane or polycarbonate transparent paint.
4. The production method according to claim 2 or 3, the inorganic material being a high-refractive-index metal oxide.
5. The method of claim 2 or 3, wherein the curing agent comprises, but is not limited to, an aliphatic amine curing agent.
6. The method of preparing according to claim 2 or 3, wherein the leveling agent includes, but is not limited to, an acrylic leveling agent, a silicone-based leveling agent, or a fluorocarbon-based leveling agent.
7. The method according to claim 2 or 3, wherein the adhesion promoter is a siloxane coupling agent.
8. The production method according to claim 2 or 3, wherein the refractive index of the optical compensation material is 1.4 to 1.6.
9. An optically compensated foldable glass composite cover sheet produced according to any one of the production methods of claims 1 to 8, wherein the optically compensated foldable glass composite cover sheet comprises an area-thinned foldable glass on which an optically compensated filler layer is disposed.
10. Use of the optically compensated foldable glass composite cover plate prepared by the preparation method according to any one of claims 1 to 8 for the manufacture of a display screen.
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| CN202110463714.6A CN113183550A (en) | 2021-04-26 | 2021-04-26 | Optical compensation foldable glass composite cover plate and preparation method and application thereof |
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| CN202110463714.6A CN113183550A (en) | 2021-04-26 | 2021-04-26 | Optical compensation foldable glass composite cover plate and preparation method and application thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113888983A (en) * | 2021-11-01 | 2022-01-04 | 合肥维信诺科技有限公司 | Cover plate and flexible display module |
| CN114120833A (en) * | 2021-11-26 | 2022-03-01 | 赛德半导体有限公司 | Ultrathin glass cover plate and preparation method thereof, display panel and display device |
| CN114373391A (en) * | 2022-01-11 | 2022-04-19 | 武汉华星光电半导体显示技术有限公司 | Foldable display module |
| CN114536893A (en) * | 2022-03-29 | 2022-05-27 | 芜湖长信科技股份有限公司 | Foldable glass cover plate structure and manufacturing method thereof |
| CN114563883A (en) * | 2022-03-01 | 2022-05-31 | 苏州兴派丽智能科技有限公司 | Tool, tool manufacturing method, detection machine table and manufacturing machine table applying tool manufacturing method |
| CN115064075A (en) * | 2022-06-30 | 2022-09-16 | 芜湖长信科技股份有限公司 | Flexible glass with continuously-changed regional thickness and preparation method and application thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114120833A (en) * | 2021-11-26 | 2022-03-01 | 赛德半导体有限公司 | Ultrathin glass cover plate and preparation method thereof, display panel and display device |
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| CN114536893A (en) * | 2022-03-29 | 2022-05-27 | 芜湖长信科技股份有限公司 | Foldable glass cover plate structure and manufacturing method thereof |
| CN115064075A (en) * | 2022-06-30 | 2022-09-16 | 芜湖长信科技股份有限公司 | Flexible glass with continuously-changed regional thickness and preparation method and application thereof |
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