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:
Apr. 05, 2016
Filed:
Dec. 20, 2011
Yasuharu Onishi, Kanagawa, JP;
Yuichiro Kishinami, Kanagawa, JP;
Shigeo Satou, Kanagawa, JP;
Jun Kuroda, Kanagawa, JP;
Yukio Murata, Kanagawa, JP;
Motoyoshi Komoda, Kanagawa, JP;
Nobuhiro Kawashima, Kanagawa, JP;
Tatsuya Uchikawa, Kanagawa, JP;
Yasuharu Onishi, Kanagawa, JP;
Yuichiro Kishinami, Kanagawa, JP;
Shigeo Satou, Kanagawa, JP;
Jun Kuroda, Kanagawa, JP;
Yukio Murata, Kanagawa, JP;
Motoyoshi Komoda, Kanagawa, JP;
Nobuhiro Kawashima, Kanagawa, JP;
Tatsuya Uchikawa, Kanagawa, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In an electro-acoustic transducerwhich is an oscillator device, center positions of principal surfaces of piezoelectric elementsthat are positioned on both surfaces of an elastic memberare different from each other. As such, since the two piezoelectric elementsare disposed asymmetrically on the upper and lower sides in the electro-acoustic transducer, it is possible to prevent vibrations of reversed phases at the time of divided vibration in which the reversed phases overlap with each other. In other words, since it is possible to prevent the generation of sound waves due to the vibration of local reversed phases, the sound pressure level can be improved.