Patent ID: 7824085

Claim:
A vehicular illumination device comprising: a vehicular illumination unit whose light distribution is alterable; a detection unit that detects an illumination object comprising at least one of other vehicles and pedestrians; a light distribution control unit that performs an alteration control of the vehicular illumination unit such that light illuminated from the vehicular illumination unit to a region corresponding to the illumination object detected by the detection unit is non-illuminated or reduced; a determination unit that, when the illumination object detected by the detection unit ceases to be detected, determines whether or not there is a need to maintain the alteration control by the light distribution control unit in a current state, and determines that there is a need to maintain the alteration control by the light distribution control unit in the current state when a vertical movement is detected by a vertical movement detection unit, which detects a vertical movement of the vehicle; and a control unit that, when it is determined by the determination unit that there is a need to maintain the alteration control in the current state, controls the light distribution control unit so as to maintain the alteration control by the light distribution control unit in the current state.