| 摘要 |
A video projector ( 1 ) comprises a light source ( 11 ) enclosed in a lamp box ( 12 ), an optical engine ( 100 ) including a color wheel ( 13 ), an optical tunnel ( 15 ), a mirror ( 16 ) and a DMD (Digital Micro-mirror Device) ( 17 ), and a blower fan ( 30 a) disposed in the vicinity of the light source ( 11 ) and below the optical engine ( 100 ). The blower fan ( 30 b) sucks air through a portion of the optical engine ( 100 ) where the optical tunnel ( 159 and so an are provided except the color wheel ( 13 ), generates a cooling air and exhausts a part of the cooling air toward the color wheel ( 13 ) and the rest of the cooling air toward the light source ( 11 ), so that the elements of the optical engine ( 100 ) and the light source ( 11 ) are cooled by the blower fan ( 30 b) simultaneously.
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