{HEAD ~ A projection type display device} 1, wherein {TAIL ~ a scanning speed} of the light deflection device is changed according to 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 
wherein
{ HEAD ~ A projection type display device } 1 , wherein { TAIL ~ a scanning speed } of the light deflection device is changed according to 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
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH