Patent ID: 7255445

Claim:
A projection type image display device comprising: projecting means for projecting an image onto a screen for image display by scanning laser light; wherein said laser light includes a plurality of laser beams; said projecting means irradiates a substantially identical position on said screen with at least two of said plurality of laser beams with a time difference; and an image signal applied to each of said laser beams has the time difference such that a preceding said laser beam is delayed with respect to a succeeding said laser beam so as to correspond to said time difference in irradiation, wherein said plurality of laser beams comprise laser beams of different display colors, and a color image is displayed as said image on said screen, and wherein a ratio between laser outputs of the display colors at a time of white display is satisfied, and a number of light sources for the laser beams of the display colors is set so as to equalize outputs of the laser beams.