Video projector
US6597409B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jan 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3114
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video projector which can obtain high brightness of a projected image, high color purity and low color shading and which can be downsized and reduce the manufacturing cost is provided. The video projector has: an optical source 1; a color selection scanning device 21 for selectively filter a color of a light from the optical source 1 to generate a light flux having a specific color in synchronism with a supplied video signal; a video displaying device 4 for modulating an intensity of the light flux in synchronism with the video signal pixel by pixel to form a modulated image responsive to the video image; an imaging lens 72 disposed between the color selection scanning device 21 and the video displaying device 4, for imaging an intensity distribution and a color distribution of the light flux outgoing from the color selection scanning device 21 on a surface of the video displaying device 4; and a projecting lens 5 for projecting the modulated image formed by the video displaying device 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.