Laser beam color image display apparatus
First Claim
1. A laser beam color image display apparatus comprising:
- first laser beam generating means for generating a blue laser beam;
second laser beam generating means for generating a green laser beam;
third laser beam generating means for generating a red laser beam;
said third laser beam generating means comprising mixing means for 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, thereby generating the red laser beam; and
scanning means for scanning a display screen with said blue laser beam, said green laser beam, and said red laser beam to display a color image on the display screen;
said third laser beam generating means further comprising first modulating means for modulating the intensity of said laser beam having the wavelength of 568.2 nm with a red signal component of a video signal and second modulating means for modulating the intensity of said laser beam having the wavelength of 647.1 nm with said red signal component.
1 Assignment
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Accused Products
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.
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Citations
9 Claims
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1. A laser beam color image display apparatus comprising:
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first laser beam generating means for generating a blue laser beam; second laser beam generating means for generating a green laser beam; third laser beam generating means for generating a red laser beam; said third laser beam generating means comprising mixing means for 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, thereby generating the red laser beam; and scanning means for scanning a display screen with said blue laser beam, said green laser beam, and said red laser beam to display a color image on the display screen; said third laser beam generating means further comprising first modulating means for modulating the intensity of said laser beam having the wavelength of 568.2 nm with a red signal component of a video signal and second modulating means for modulating the intensity of said laser beam having the wavelength of 647.1 nm with said red signal component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification