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:
Feb. 26, 2013
Filed:
Nov. 12, 2008
Yasuharu Onishi, Tokyo, JP;
Yasuhiro Sasaki, Tokyo, JP;
Masatake Takahashi, Tokyo, JP;
Ukyo Mori, Tokyo, JP;
Jun Kuroda, Tokyo, JP;
Nozomi Toki, Saitama, JP;
Yukio Yokoyama, Saitama, JP;
Yasuharu Onishi, Tokyo, JP;
Yasuhiro Sasaki, Tokyo, JP;
Masatake Takahashi, Tokyo, JP;
Ukyo Mori, Tokyo, JP;
Jun Kuroda, Tokyo, JP;
Nozomi Toki, Saitama, JP;
Yukio Yokoyama, Saitama, JP;
NEC Corporation, Tokyo, JP;
Abstract
A piezoelectric acoustic device comprises: at least two piezoelectric actuators; a support body that supports the at least two piezoelectric actuators; and a signal input unit that drives the at least two piezoelectric actuators at respective arbitrary times. At least one pair of piezoelectric actuators among the at least two piezoelectric actuators is arranged in such a manner that their sound radiation surfaces face each other with a predetermined gap.