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