PIEZOELECTRIC ELEMENT, PIEZOELECTRIC ACTUATOR INCLUDING ELEMENT, AND PIEZOELECTRIC MODULE INCLUDING ACTUATOR

摘要

According to an embodiment, a piezoelectric element comprises a piezoelectric part having a plate shape having a height, a lateral width greater than the height, and a vertical width greater than the lateral width, a plurality of internal electrodes disposed in parallel inside the piezoelectric part and spaced apart in the vertical width direction, an external electrode disposed on a side surface of the piezoelectric part defined by the height and the vertical width, and a protective part covering the piezoelectric part and the external electrode; and a polarization direction and a longitudinal direction of the piezoelectric part coincide with each other, and a sound signal is transmitted through one surface of the piezoelectric part defined by the vertical width and the lateral width.;COPYRIGHT KIPO 2019