Device and method for displaying image

摘要

A deviation of an optic axis of a laser projector (10) is detected, and the deviation is corrected. Laser projector's CPU (160) executes: commanding (S410) a laser beam source of one color, out of laser beam sources of three colors, to emit a laser beam; shutting off the laser when sensing that the laser beam is received in a light-receiving region; applying (S430) a laser of a color to be detected as to the presence or absence of a deviation of the axis until its reception in the light-receiving region is sensed; keeping (S440) time starting when light reception in the light-receiving region is sensed and ending when light reception in a light-receiving region adjacent thereto is sensed; calculating a relative time difference of each of the colors with respect to a reference color; and correcting (S470) a light emission timing of the laser beam source of each of the color, based on the calculated time.