Transparent substrate for liquid crystal device and light control sheet
US12174492B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2023 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Oct 16, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A transparent substrate for a liquid crystal device includes an alignment layer that regulates an alignment direction of liquid crystal molecules contained in a light control layer included in a light control sheet, which is the liquid crystal device, and a base layer on which the alignment layer is formed. The substrate includes a first surface and a second surface opposite to the first surface. The first surface is part of the alignment layer. The second surface is part of the base layer. A surface, which contacts the alignment layer, of the base layer has surface roughness Ra1 of 20 nm or less in a pencil hardness test. A sum Ra1+Ra2 of the surface roughness Ra1 and surface roughness Ra2 of the second surface is 5 nm or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.