Liquid crystal display device having retardation film formed of liquid crystalline polyimide having photoreactive group
US8730435B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jun 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a liquid crystal display device having a plurality of retardation films for alleviating a deterioration in display quality depending on a viewing angle direction, and a driving liquid crystal layer selected from the group consisting of a driving liquid crystal layer typified by a VA mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned perpendicular to a substrate when no electric field is applied, a driving liquid crystal layer typified by an IPS mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned parallel to the substrate when no electric field is applied, and a driving liquid crystal layer that shows optical isotropy when no voltage is applied, a retardation film of a positive A-plate formed of a liquid crystalline polyimide having a photoreactive group is used as at least one layer of the plurality of retardation films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.