Patent ID: 6837583
Filing Date: 2005-01-04
Classification: F21V,H04N

Abstract:
1. A projector device comprising as housed in a casing a lamp unit serving as a light source, and an optical system for separating light from the lamp unit into beams of three primary colors, combining the beams of three primary colors into a color image-forming beam and projecting the resulting beam forward from a projection lens, wherein the lamp unit comprises a lamp disposed within a housing having at least four peripheral walls and an exhaust fan disposed to the rear of the lamp, at least one of the four peripheral walls of the housing surrounding the lamp being provided with an opening pattern arranged asymmetrically about an optical axis of the lamp by forming at least one air inlet opening in a position deviated from the optical axis toward a direction orthogonal to the axis for producing a swirling air current within the housing by rotating the exhaust fan.