PIEZOELECTRIC VIBRATION ELEMENT, AND PIEZOELECTRIC VIBRATION DEVICE AND PORTABLE TERMINAL USING PIEZOELECTRIC VIBRATION ELEMENT

摘要

A piezoelectric vibration element which includes at least a plurality of electrodes and a plurality of piezoelectric layers alternately disposed in a first direction, and performs bending vibration in the first direction so as to change amplitude in a second direction vertical to the first direction by inputting an electric signal, and in which a center of a facing portion in the second direction is provided at a different position from a center of the piezoelectric vibration element in the second direction, the facing portion including a portion in which one of the piezoelectric layers interposed between the electrodes that are disposed so as to be adjacently opposed to each other, and a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element are provided.

主权项

1. A piezoelectric vibration element which includes at least a plurality of electrodes and a plurality of piezoelectric layers alternately disposed in a first direction, and performs bending vibration in the first direction so as to change amplitude in a second direction vertical to the first direction by inputting an electric signal,
wherein a center of a facing portion in the second direction is provided at a different position from a center of the piezoelectric vibration element in the second direction, the facing portion is a portion in which the electrodes that are disposed adjacent to each other in the first direction and have different electric potentials face each other by having each of the piezoelectric layers therebetween.