Piezoelectric device piezoelectric actuator including the device and piezoelectric module including the actuator

摘要

According to an embodiment, a piezoelectric element comprises a piezoelectric part, a plurality of first electrodes and a plurality of second electrodes which are alternately spaced apart and laminated at predetermined intervals in the piezoelectric part, and a first outer electrode connected to the plurality of first electrodes and a second outer electrode connected to the plurality of second electrodes disposed on a side surface of the piezoelectric part. A separation interval of one of a plurality of separation intervals formed between the plurality of first electrodes and the plurality of second electrodes can be different from the other separation interval. Therefore, a resonance displacement occurs at low frequencies resulting in excellent bass output.