To irradiate a light of a projector corresponding to a person's movement by preventing the lowering in the illuminance of a moving place when the person moves outside the irradiation range of the light of the projector.
This projector 1 comprising a light 2 and a support mount 9 is so formed that rotary tables 4 and 8 is attached to the support mount 9, the light 2 and a human body position sensor 3 are attached to the rotary tables 4 and 8, the position of the moving person is detected by the human body position sensor 3, the rotary tables 4 and 8 are rotated by the output of the human body position sensor 3, and the rotary tables 4 and 8 of the projector 1 are controlled, so that the irradiation range of the light 2 is turned to the direction of the person.
IIMURA YOSHIO
ORIGASA HIROAKI
