Patent ID: 7325929
Filing Date: 2008-02-05
Classification: G09G,H04N

Abstract:
1. An arrangement for projecting an image on a projection surface comprising: a red laser source for generating a red laser beam; a blue laser source for generating a blue laser beam; a green laser source for generating a green laser beam; an acousto-optical modulator (AOM) for converting image data into acoustic signals for modulating one of the laser beams, the AOM including a crystal through which the one laser beam passes, and an acoustic transducer for converting the acoustic signals into acoustic waves in the crystal and operative for deflecting the one modulated laser beam modulated by the image data; a controller for controllably energizing the laser sources that generate other of the laser beams to modulate the other laser beams to form modulated other laser beams, a combiner for combining the modulated laser beams to form a composite beam; a scanner for sweeping the composite beam to form a scan line having pixels arranged along one direction, and for sweeping the scan line along another direction generally orthogonal to the one direction to form a raster pattern of scan lines on the projection surface; and the controller being operative to illuminate selected pixels on the scan lines to form the image on the projection surface.