Light valve system and method with pulsed readout
US4807976A · kind A · utility
13Cited by
9References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/135
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pulsed readout technique is described for liquid crystal light valves which eliminates the problem of readout beam leakage through the light valve mirror. The readout beam is pulsed on only when the light valve's semiconductor layer is out of a depletion state. This can occur during an accumulation state or, in certain applications, during a specially inserted quiescent period in the light valve voltage cycle. The invention is applicable to light valves with various types of modulating inputs, and can be used with either dielectric or metal matrix mirrors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.