| 摘要 |
PROBLEM TO BE SOLVED: To efficiently forcibly cool a light modulation means part, a light source part, etc., while making an entire projection display device small-sized and light-weight by preventing broken glass pieces or the like from being scattered into a housing of a projector device through a cooled air inlet under a lamp bulb at the breakdown or replacement of the lamp bulb and reducing the number of cooling fans for use. SOLUTION: A lamp box 41 is so constituted that cooled air sent from a fan for ventilation may be sent to three space light modulation element parts, a PS conversion element part, and a discharge lamp 6 part by a duct 33 for ventilation to forcibly cool them, and a light source is stored in the lamp box 41, and the lamp box 41 can be attached to and detached from the housing and has a cooled air inlet 407, through which cooled air is taken in, and is provided with a shutter 55 which is provided in the cooled air inlet 47 and automatically opens the cooled air inlet 47 by setting the lamp box 41 in the housing 2 and automatically closed the cooled air inlet 47 by detaching the lamp 41 out of the housing 2.
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