Patent ID: 9049522
Filing Date: 2015-06-02
Classification: H04R

Abstract:
1. A piezoelectric microspeaker comprising: a substrate which has a through hole formed therein; a diaphragm which is disposed on the substrate and covers the through hole; and a plurality of piezoelectric actuators that are separated from each other with portions of the diaphragm disposed between the plurality of piezoelectric actuators, wherein the plurality of piezoelectric actuators comprise a central actuator which is disposed on a central portion of the diaphragm, and a plurality of edge actuators which are disposed a predetermined distance apart from the central actuator and are formed on a plurality of edge portions of the diaphragm, and wherein the diaphragm comprises a plurality of actuating portions and a plurality of non-actuating portions between the plurality of actuating portions, each of the plurality of actuating portions comprising a first insulating portion, and each of the plurality of the non-actuating portions comprising a second insulating portion.