Drive device for vibrating member, vibration type actuator using the same, and imaging apparatus
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United States of America Patent
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Nov 21, 2017
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app pub date -
Jul 11, 2016
filing date -
Jul 14, 2015
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Abstract
When stopping a vibration type actuator at a final target stopping position, driving frequency and phase difference of AC signals input to a piezoelectric element are set in accordance with a first deviation obtained from a command position sequentially determined and a relative position of a vibrating member and driven element, and also pulse duty is adjusted in accordance with a second deviation obtained from a final target stopping position and the relative position.
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