Patent ID: 7083286

Claim:
A projector projecting an image onto a screen, comprising: a lamp emitting light; an optical system having an optical synthesizer including a blue panel, a green panel and a red panel, and an optical component disposed along an optical path from the lamp to the optical synthesizer; a cooling fan generating cool air cooling the optical system; a guiding duct comprising a first and a second passage, the first and second passages extending from an area proximate to an inlet portion of the projector to an area proximate to a mid-section of the projector, guiding the cool air into interior sections of the projector; and a heating component provided outside of the optical system, wherein the first passage of the guiding duct guides the cool air toward a place where a relatively high-temperature heat is generated in the optical system, wherein the second passage of the guiding duct guides the cool air to flow toward a place where a relatively low-temperature heat is generated in the optical system, and wherein the cool air passing through the second passage becomes higher in temperature than the cool air passing through the first passage as the cool air passing through the second passage meets the heating component.