Patent ID: 8204091

Claim:
A method of controlling a laser projection system comprising a visible light source, wherein the visible light source comprises a semiconductor laser and a wavelength conversion device, the method comprises: generating at least a portion of a scanned laser image by configuring the semiconductor laser for optical emission of encoded image data and scanning an output beam of the visible light source across a plurality of image pixels or encoded data periods, the semiconductor laser comprising a gain section, a phase section, and a wavelength selective section; and shifting the optical emission across a plurality of laser cavity modes by applying a quasi-periodic phase shifting signal I/V Φ to the phase section of the semiconductor laser, the quasi-periodic phase shifting signal I/V Φ having only two distinct drive levels, a maximum drive level and a minimum drive level, wherein the quasi-periodic signal transitions periodically between the maximum drive level and the minimum drive level at a frequency that varies randomly over time independently of a drive signal I GAIN applied to the gain section of the semiconductor laser.