Light modulation device and optical display device, and light modulation method and image display method
US7236285B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Feb 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection type display device includes dichroic mirrors which separate the light from the light source into light of the three primary colors R, G and B, a plurality of color modulation light valves upon which the light beams separated by the dichroic mirrors are respectively incident and comprising a plurality of picture elements which are capable of being individually controlled with regard to their transmittivity ratios, a dichroic prism which combines the light beams from the color modulation light valves, a relay lens which forms the optical images of the color modulation light valves upon the picture element surface of a reflective type liquid crystal light valve, and a reflective type liquid crystal light valve upon which the light from the relay lens is incident and comprising a plurality of picture elements whose reflectivity ratios can be individually controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.