LAMINATED PIEZOELECTRIC ELEMENT, PIEZOELECTRIC ACTUATOR USING THE SAME, PIEZOELECTRIC SENSOR AND ULTRASONIC MOTOR

摘要

PROBLEM TO BE SOLVED: To control a displacement, using a simple control circuit. ;SOLUTION: This laminated piezoelectric element 100 is formed as an integrated structure, in which a first laminated piezoelectric element 110 and a second piezoelectric element 120 are stacked in the thickness direction. The first laminated piezoelectric element 110 is formed, in such a way that piezoelectric elements 111 which are thinner than piezoelectric elements 121 constituting the second piezoelectric element 120 are laminated. In the first laminated piezoelectric element 110, electrodes 112 are installed between the respective piezoelectric elements 111, and they are electrically connected in parallel at the outside every other layer. In the piezoelectric elements 111, 112, their polarization is treated in the thickness direction. In addition, even in the second laminated piezoelectric element 120, electrodes 122 are installed between the respective piezoelectric elements 121, and they are electrically connected in parallel at the outside every other layer.;COPYRIGHT: (C)2000,JPO