| 摘要 |
A safety device for a power window which can perform an appropriate safety control operation even immediately after a battery change. An opening and closing speeds detecting portion 35 detects the opening and closing speeds of a windowpane based on voltages VA, VB outputted from a potensiosensor 20 provided on a driving motor 9 for operating the windowpane to open and close, and further detects a fully opened position of the windowpane based on the opening and closing speeds so detected. Then, a fully closed position of the windowpane 1 is estimated referring to opening and closing strokes of the windowpane, whereby a safety control area is set based on this fully closed position. Thus, even in a state resulting just after a battery change in which a fully closed position of the windowpane 1 is not accurately recognized and hence the safety control area is not accurately set, the safety control area can be set highly reliably based on the estimated fully closed position, whereby an accurate safety control operation can be secured for a power window apparatus all the time.
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