Laser beam color image display apparatus

Details Laser beam color image display apparatus Laser beam color image display apparatus

1991-11-21

1993-10-19

Oberley, Alvin E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

353 31, 358 61, H04N 931

Patent

active

052550826

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.

REFERENCES:
patent: 3597536 (1971-08-01), Fowler
patent: 3710015 (1973-01-01), Fowler
patent: 3783185 (1974-01-01), Spaulding
patent: 3818129 (1974-06-01), Yamamoto
patent: 4145712 (1979-03-01), Spooner et al.
Proceedings of the S.I.D., vol. 12, Nr 2, Second Quarter 1971, pp. 72-76, Schlafer & Al, "A Low Voltage Multiple-Wavelength, Electro-Optic Modulator".
Electronics, pp. 143-146, Jul. 25, 1966, Probing the News, "Toward Large Color Displays:Eliminating Film from the Picture".
IEEE Spectrum, Dec. 1968, pp. 39-50, Baker, "Laser Display Technology".

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