Optical unit and image display device thereof
US6493149B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Sep 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/123
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single plate type optical unit and display device to utilize light with high efficiency in a simple method is configured so a dichroic mirror separates light into a plurality of colors, and the plurality of colors of light reflected by the dichroic mirror are beamed onto a rotating multisurface element, the plurality of colors of light emitted from the rotating multisurface element are each beamed onto different locations on the display element, and by rotating the rotating multisurface element, the plurality of colors of light are moved in one direction along the display element, and a color image is beamed from a projection lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.