3D cover glass, mold for molding same, and method for manufacturing 3D cover glass
US11613490B2 · kind B2 · utility
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1References
18Claims
0Family size
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Key dates
| Filing date | May 29, 2020 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | May 29, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A 3D cover glass, having a polygonal shape in a plan view which corner part may comprise a rounded portion, and containing a central part being flat plane, and curved parts each with a three-dimensional curved surface having a curvature radius of 100 mm or less on peripheries of at least two of the sides of the polygonal shape, wherein the 3D cover glass shows the maximum value of retardation per 1 mm thickness being 16 nm/mm or less when measured by irradiating a light having a wavelength of 543 nm onto the central part orthogonally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.