Patent ID: 6832838
Filing Date: 2004-12-21
Classification: G03B

Abstract:
A projector, comprising:a casing; a plurality of inlet ports formed on the casing; a plurality of outlet ports formed on the casing; a light source positioned within the casing; an optical engine for processing light rays from the light source and projecting an image onto a display screen; and a fan installed within the casing to suck air streams into the casing from the inlet ports and to exhaust the air streams out of the casing from the outlet ports, wherein a buffer chamber is defined among the fan, the outlet ports, and the casing, and the casing comprises: a first housing; and a second housing, wherein the first housing is retractable relative to the second housing so that a volume of the buffer chamber may be changed, and the inlet ports and the outlet ports are formed on each of the first housing and the second housing.