Mirror and aperture based color phase detector for use in a multimedia projection system
US6474818B1 · kind B1 · utility
11Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Nov 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multimedia projector employing a color wheel housed within a shroud uses a light guide that is integral with the shroud and formed as an aperture extending through the shroud to transmit light from the color wheel to a photo detector that detects a particular color or colors of light to provide an index mark signal to a display controller to synchronize red, green, and blue image data with the associated color wheel filter segments. A reflector is located at an exit end of the light guide to reflect the light through a dichroic filter positioned on the shroud toward the photo detector on a circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.