Patent ID: 7052144
Filing Date: 2006-05-30
Classification: G03B

Abstract:
1. A projector, comprising: a light source device; an optical modulator that modulates a light beam irradiated by the light source device in accordance with image information; a projection optical device that projects the modulated light beam in an enlarged manner; and a substantially rectangular parallelepiped casing in which the light source device, the optical modulator, and the projection optical device are arranged, wherein an exhaust hole that exhausts air inside the casing to the outside is formed on the casing on one of end surfaces substantially orthogonal to a projection direction of the light beam from the projection optical device, wherein an exhaust fan that sucks the air inside the casing and discharges the air via the exhaust hole is provided on the casing, the exhaust fan being opposed to the exhaust hole, and wherein the exhaust fan is a centrifugal fan that discharges the air sucked from a fan rotation axis direction to a rotation tangential direction, a suction side of the exhaust fan being disposed along a plane orthogonal to an optical path plane defined by the light source device, the optical modulator and the projection optical device, a discharge side thereof being inclined in a fan rotation direction, so that the sucked air is discharged substantially toward the center of the end surface with the exhaust hole formed in a direction orthogonal to the optical path plane.