Liquid crystal light valve apparatus with a pair of non-parallel phase difference plates
US5490006A · kind A · utility
25Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Apr 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133632
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a liquid crystal light valve apparatus comprising an incident side polarizing plate, a twisted nematic liquid crystal cell of active matrix type and an outgoing side polarizing plate, two phase difference plates are provided between the incident side polarizing plate and the liquid crystal cell. Optical axes of both the phase difference plates are perpendicular with each other, and one of them is slanted by an angle, and thereby, a phase difference which is caused by the liquid crystal cell is compensated by the phase difference caused by two phase difference plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.