Patent ID: 7665853

Claim:
An arrangement for enhancing image projection, comprising: a light source for generating a light beam; a mirror assembly, including a scan mirror, for reflecting the light beam as a pattern of scan lines on a projection surface, each scan line having a number of pixels; a controller for causing selected pixels in the scan lines to be illuminated, and rendered visible, by the light beam to form an image on the projection surface during a forward scan of the pattern, and for non-illuminating the pixels in the scan lines during a return scan of the pattern; and a drive for moving the scan mirror during the forward scan, for holding the scan mirror stationary during a holding period interval intermediate the forward scan and the return scan, and for driving the scan mirror during the return scan with a first drive pulse of one polarity during a first return interval of the return scan, and with a second drive pulse of opposite polarity during a subsequent, second return interval of the return scan.