Laser beam color image display apparatus
US5255082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Nov 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser beam color image display apparatus includes a single laser beam source for emitting a laser beam from which a plurality of blue, green, and red laser beams are separated, or a plurality of laser beam sources for emitting respective blue, green, and red laser beams. The red laser beam is generated by adding a laser beam having a wavelength of 568.2 nm and a laser beam having a wavelength of 647.1 nm by way of active mixture. The laser beams are modulated in intensity with color signal components, and then deflected by a light scanner, composed of a polygon mirror and a galvanometer mirror to scan a display screen for thereby displaying a color image thereon. The laser beam having the wavelength of 568.2 nm and the laser beam having the wavelength of 647.1 nm are added at an output power ratio of 1:20, with the resultant red laser beam having a wavelength of 612 nm. The single laser beam source may comprise an argon-krypton mixed gas laser, or the laser beam source for emitting the red laser beam may comprise a krypton gas laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.