Inventors

Hye Jin Kim, Yang Woo Seok, Kim Jongdae

Application No.

13289225 (2011.11.04)

Publication No.

20120148073 (2012.06.14)

Registration No.

8873776 (2014.10.28)

Country

UNITED STATES

Project Code

10MB3300, Development of self-powered smart sensor node platform for smart&green building, Kim Jongdae

Abstract

Disclosed is a piezoelectric speaker including: a piezoelectric layer that converts electrical signals into oscillation and outputs sound; an electrode that is formed on a top or a bottom of the piezoelectric layer to apply the electrical signals to the piezoelectric layer; an acoustic diaphragm that is made of a hetero material including a first acoustic diaphragm and a second acoustic diaphragm and is attached to the bottom of the piezoelectric layer on which the electrode is formed; and a frame attached in a form enclosing a side of the acoustic diaphragm.

KSP Keywords

Electrical signal, Piezoelectric speaker, piezoelectric layer