Patent ID: 7993010

Claim:
A light source compartment storing a light source unit, the light source compartment comprising: a light source storing section which is defined by partitioning walls which surround the light source unit; an air inlet port which is provided in the partitioning walls for causing air discharged from a cooling fan to flow into the light source storing section; and at least one rotatable light shielding member which includes a rotational shaft and a plurality of vane portions on the rotational shaft, and which is provided in an air outlet port which is defined in the partitioning walls to let out the air; wherein the air outlet port has a flow path partitioning wall which defines an outlet flow path for guiding air discharged from the light source storing section; wherein the rotational shaft of the light shielding member is disposed in a vicinity of the flow path partitioning wall so that the vane portions close the outlet flow path; wherein a curved portion is formed in the flow path partitioning wall so as to permit rotational passage of the vane portions; and wherein the rotational shaft is disposed in a vertical direction with respect to a flow of air discharged from the outlet flow path.