| 摘要 |
PROBLEM TO BE SOLVED: To provide a shutter device well closed even when the position of the shutter is not detected at the detection position of a position sensor. SOLUTION: The position sensor 50 for detecting the present position of the shutter is positioned between a full open position Ho and a full close position Hs. A storage part stores a first control amount P1 required for the distance between the detection position of the position sensor 50 and the full close position Hs, and the total control amount Ptotal obtained by adding a preliminary control amount Pαto a second control amount P2 required for the distance between the full open position Ho and the detection position of the sensor 50. The first control means controls a drive part according to the first control amount P1 when the position of the shutter is detected by the position sensor 50. The second control means controls the drive part according to the total control amount Ptotal when the position of the shutter is not detected by the position sensor 50. COPYRIGHT: (C)2008,JPO&INPIT
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