Laser video projector
US6426781B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1999 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Mar 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser video projector for modulating light from a laser light source by an acousto-optic modulator (AOM) according to a video signal and projecting video information to a screen using a scanner is provided. The laser video projector includes a light source for outputting a beam of white light formed of first, second, and third main wavelengths, a light separator for separating the beam of the white light into beams of monochromatic lights having first, second, and third main wavelengths in a predetermined transmission factor and a predetermined reflectivity, light modulator for modulating the beams of the monochromatic lights according to a chrominance signal, light combiner for combining the monochromatic lights modulated by the light modulator into a beam, and light scanner for scanning the combined beam of the modulated monochromatic lights, thus forming an image. Furthermore, it is possible to clearly separate the monochromatic light incident on the acousto-optic modulator and to intercept lights having different wavelengths, thus realizing the color of the image focused on the screen closer to a natural color, by using the light source the white light laser emitted from whic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.