Flexible display cover substrate
US11442201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2019 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jun 21, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/113
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A flexible display cover substrate is provided, including a transparent polyimide film and a device protective layer. The device protective layer is formed by a hard coating layer disposed on at least one side of the transparent polyimide film, and the hard coating layer is composed of three or more reactive functional group compounds, an initiator, an elastic oligomer, a nano inorganic modified particle, and a fluorescent pigment. The flexible display cover substrate of the invention, after being folded by a radius of curvature of 1 mm, does not cause cracks on the surface of the hard coating layer or break the substrate, and the yellow index YI of the flexible display cover substrate is less than 2.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.