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Registered PIEZOELECTRIC SPEAKER AND METHOD OF MANUFACTURING THE SAME

압전형 스피커 및 그 제조 방법
이미지 확대
Inventors
Hye Jin Kim, Lee Hongyeol, Lee Sung Q, Kang-Ho Park, Kim Jongdae, Koo Kunmo
Application No.
12878293 (2010.09.09)
Publication No.
20110135123 (2011.06.09)
Registration No.
8335329 (2012.12.18)
Country
UNITED STATES
Project Code
09MB1500, Components/Module Technology for Ubiquitous Terminals, Kim Jongdae
Abstract
In a piezoelectric speaker, an acoustic diaphragm is thicker than a piezoelectric thin film and is formed of a more flexible and higher elasticity material than the piezoelectric thin film, thereby greatly improving output sound pressure in a low frequency band and reducing sound distortion. Further, the piezoelectric thin film is attached to the acoustic diaphragm in an inclined structure in which the piezoelectric thin film is horizontally turned from the acoustic diaphragm, thereby preventing a standing wave from being created by structural symmetry and minimizing sound distortion.
KSP Keywords
Piezoelectric speaker, Piezoelectric thin film, Sound pressure, Standing Wave, frequency band, low-frequency, thin film(TF)