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