{HEAD ~ A projection type display device} includes a light source, a picture information display element, and {TAIL ~ 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 
includes
{ HEAD ~ A projection type display device } includes a light source , a picture information display element , and { TAIL ~ 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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