LCD projection system which aligns the larger beam spread angle of the light source with the larger acceptance angle of the light valve and a nonimaging reflector for an illumination system
US5467207A · kind A · utility
8Cited by
12References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Jul 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection system comprising a liquid crystal light valve having a wider acceptance angle for incident light in a first direction than in a second direction transverse to the first direction and an illumination system. The illumination system provides light to the liquid crystal light valve at a greater beam spread angle in the first direction than in the second direction. The system also includes projection optics for receiving light from the liquid crystal light valve and projecting such light toward a projection surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.