Method for driving piezoelectric element or optical modulator including piezoelectric element
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United States of America Patent
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Aug 4, 2009
Grant Date -
Dec 4, 2008
app pub date -
May 28, 2008
filing date -
Jun 1, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are a method for driving a piezoelectric element or an optical modulator including a piezoelectric element and a recorded medium recorded with a program for executing the same. In accordance with an embodiment of the present invention, the method for driving a piezoelectric element causing a displacement object to be displaced by being contracted or expanded according to a supplied driving voltage, including supplying a driving signal to the piezoelectric element during a first driving period in a first voltage range; supplying a control signal for controlling a polarization hysteresis of the piezoelectric element according to a driving, performed during the first driving period, to the piezoelectric element; and supplying the driving signal to the piezoelectric element during a second driving period in a second voltage range.
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