Patent ID: 7665852

Claim:
An image projection arrangement for projecting an image, comprising: an energizable laser assembly including a plurality of lasers for generating a plurality of laser beams of different wavelengths each laser having an output power when energized; an energizable scanner including a pair of oscillatable scan mirrors for sweeping the laser beams at respective scan rates as a pattern of scan lines at a distance from the laser assembly, each scan line having a number of pixels; a controller operatively connected to the laser assembly and the scanner, for causing selected pixels along the scan lines to be illuminated, and rendered visible, by the laser beams to produce the image; and a safety circuit for detecting a malfunction of at least one of the laser assembly and the scanner, and for deenergizing at least one of the lasers when a total output power of all of the lasers exceeds a threshold proportional to one of the scan rates of one of the scan mirrors.