Patent ID: 7314280

Claim:
A projector apparatus comprising: an optical system unit including an optical prism unit and a PS conversion device for aligning polarization directions of light from a light source lamp; cooling means for cooling the optical system unit; and a cabinet containing therein the optical system unit and the cooling means; wherein the cooling means further comprises: a sirocco fan having a suction port; a first air trunk for guiding air from the sirocco fan through a first duct to the optical prism unit; and a second air trunk for guiding air from the sirocco fan through the first duct and a second duct to the PS conversion device, the second air trunk being shielded from the first air trunk by a partition wall; and wherein the cabinet receives the air from the first air trunk and the second air trunk so as to cool the air to normal temperature before recirculating into the suction port of the sirocco fan.