STRUCTURE FOR COOLING AN ILLUMINATION OPTICAL SYSTEM AND PROJECTION DISPLAY APPARATUS
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United States of America Patent
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Feb 23, 2017
app pub date -
Apr 30, 2014
filing date -
Apr 30, 2014
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Abstract
A cooling structure for an illumination optical system includes: a fluorescent unit having a fluorescent layer that emits fluorescent light due to excitation light radiated from a light source; a fan for blowing cooling air to the fluorescent unit; and a duct that partitions an internal space and an external space, the internal space having the fluorescent unit disposed therein, and that guides the cooling air blown from the fan to the fluorescent unit.
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