A projection type display device includes {TAIL ~ a light source}, a picture information display element, and a light deflection device that deflects light from {HEAD ~ the light source} and irradiates the deflected light on one region of the picture information display element 
A projection type display device includes { TAIL ~ a light source } , a picture information display element , and a light deflection device that deflects light from { HEAD ~ the light source } and irradiates the deflected light on one region of the picture information display element
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH