Patent ID: 8142028

Claim:
A projection type display device comprising: a plurality of light sources; a display device; a light-combining unit for combining output light beams from the plurality of light sources; a condensing unit for propagating an output light beam from the light-combining unit to the display device; a projecting unit for projecting an image with the use of an output light beam from the display device; and a cooling unit having a ventilating fan and disposed on each of the plurality of light sources, wherein the projection type display device further comprises a flow direction adjusting unit for switching blow-off positions where air from the fan is discharged, and a control unit for controlling switching of the blow-off positions operated by the flow direction adjusting unit, and the control unit controls the flow direction adjusting unit to switch the blow-off positions on the basis of posture information on at least one of an inclination angle of an optical axis of the plurality of light sources and a rotation angle about the optical axis.