Optically anisotropic substance and liquid crystal display
US9399736B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 17, 2014 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Dec 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To provide an optically anisotropic substance having a negative uniaxial phase difference film and a positive uniaxial phase difference film, and excellent heat resistance and sputtering resistance. The positive uniaxial phase difference film is formed in combination with a bifunctional polymerizable liquid crystal compound, the negative uniaxial phase difference film is formed in combination of the bifunctional polymerizable liquid crystal compound with an optically active compound having a polymerizable binaphthol moiety, and additional thermosetting treatment (postcure) is applied after the negative uniaxial phase difference film is photocured, and when glass transition temperature after the negative uniaxial phase difference film is cured is 85° C. or higher and 115° C. or lower, additional thermosetting treatment temperature is adjusted to 220° C. or higher and 250° C. or lower, and when the glass transition temperature is higher than 115° C., the additional thermosetting treatment temperature is adjusted to 200° C. or higher and 250° C. or lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.