The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2012
Filed:
Sep. 09, 2010
Hye Jin Kim, Daejeon, KR;
Sung Q Lee, Daejeon, KR;
Hong Yeol Lee, Cheongju, KR;
Kang Ho Park, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Kun MO Koo, Daegu, KR;
Hye Jin Kim, Daejeon, KR;
Sung Q Lee, Daejeon, KR;
Hong Yeol Lee, Cheongju, KR;
Kang Ho Park, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Kun Mo Koo, Daegu, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
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.