| 摘要 |
<p>PURPOSE:To provide a camera in which the stable polarization state of a piezoelectric body is maintained for a long time and a piezoelectric actuator is always in an action feasible state. CONSTITUTION:This camera is provided with the piezoelectric body 103, the actuator driven by the piezoelectric body 103, a maximum driving voltage impressing means 102 for impressing maximum driving voltage for forming polarization on the body 103, and a maximum driving voltage impressing signal generating means 101 for allowing the means 102 to act in accordance with at least either specified time or specified operation.</p> |
