Patent ID: 7591571

Claim:
A light source device comprising: a lamp house comprising an air inlet port for introducing cooling air into said lamp house and an air outlet port for discharging the cooling air introduced through said air inlet port; a high-pressure discharge lamp disposed in said lamp house; and an air outlet duct comprising: a first duct member comprising: a first wall having an air intake port which is connected to said air outlet port for expelling the cooling air discharged through said air outlet port out of the light source device; a second wall having an opening; and a lid which covers said opening in a closed position, and swings on a hinge in a direction away from said air outlet port to uncover said opening; and a second duct member which is connected to an end of said first duct member, said second wall having said opening being formed on another end of said first duct member, wherein said lid is urged by a resilient member to move in a direction to close said opening.