Laser beam projection display for head-up display

摘要

A laser beam display device includes a dimming setting input unit into which a dimming value corresponding to one of a plural dimming steps may be input. A first dimming processing unit having plural dimming LUTs stores dimming amounts, regarding the respective dimming steps, with the corresponding gradation levels as indexes. A second dimming processing unit having one gain LUT, holding gains regarding the respective dimming steps, and a multiplier. This creates the indexes for the respective dimming LUTs by multiplying a video signal by the gains, and a light source drive unit drives a laser diode on the basis of reference results obtained by referring to the dimming LUTs of the first dimming processing unit. Thus the luminance of the emission beam of the laser diode, which corresponds to the video signal, is dimmed in accordance with a dimming setting input from the dimming setting input unit.