Optical display device and projection-type display device
US7445345B2 · kind B2 · utility
7Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2004 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection-type display device 1 including a light source 10, an optical integrator 20, dichroic mirrors 30 and 35, a reflecting mirror 36, a relay optical system 40, parallelizing lenses 50B, 50G and 50R, liquid crystal light valves 60B, 60G and 60R, incident side lenses 70B, 70G and 70R, a light-synthesizing cross dichroic prism 80, a relay lens 90, an emergent side lens 95, a liquid crystal light valve 100 and a projection lens 110, and liquid crystal light valve 100 is provided in the rear stage of liquid crystal light valves 60B, 60G and 60R.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.