ELECTRICALLY DRIVING METHOD OF STACKED PIEZO-ELECTRIC ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide the electrically driving method of a stacked piezoelectric element which suppresses the migration of silver. SOLUTION: When an intermittent voltage is applied to the stacked piezoelectric element 10, the applied voltage respectively includes a positive polarity voltage and a negative polarity voltage in every intermittent driving. The total amount of an electric charge flowed into the stacked piezoelectric element 10 in every respective intermittent driving is preferably set to a substantial zero. Further preferably, the larger absolute value out of the positive polarity voltage or the negative polarity voltage is determined as a main voltage. The voltage opposed to the main voltage in polarity is set to a sub-voltage. The absolute value of the sub-voltage is not more than 1/4 of the absolute value of the main voltage. COPYRIGHT: (C)2005,JPO&NCIPI