Efficient optical system for a high resolution projection display employing reflection light valves
US5777789A · kind A · utility
51Cited by
21References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. The illumination system includes a light tunnel having a cross-sectional shape corresponding to the geometrical shape of the spacial light modulator to optimize the amount of light projected onto the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.