Patent ID: 7854517

Claim:
A projector comprising: a light source unit; a light source side optical system; a display device for producing a projection image; a projection side optical system for projecting the projection image; a single cooling fan for cooling the light source unit; an exhaust air temperature reducing unit for reducing a temperature of highly heated air which is produced as a result of the cooling of the light source unit by the cooling fan; a vent hole for expelling exhaust air which has passed through the exhaust air temperature reducing unit to the outside; and a bulkhead which separates the light source unit from other compartments within the projector and which guides air flows having different temperatures which have been caused to cool the light source unit by the single cooling fan such that the air flows are applied to respective different locations of the exhaust air temperature reducing unit; wherein the exhaust air temperature reducing unit absorbs and dissipates heat of the highly heated air at the different locations to which the air flows having the different temperatures guided by the bulkhead are applied, to equalize the temperatures of the air flows, such that the temperature of the highly heated air is reduced.