A projection type display device 1, wherein a scanning speed of the light deflection device is changed according to picture information and a period in which {HEAD ~ the area} outside of the effective display area is irradiated with the light is controlled according to a luminance level of {TAIL ~ the picture information} 
A projection type display device 1 , wherein a scanning speed of the light deflection device is changed according to picture information and a period in which { HEAD ~ the area } outside of the effective display area is irradiated with the light is controlled according to a luminance level of { TAIL ~ the picture information }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL