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:
Nov. 29, 2016
Filed:
Dec. 02, 2013
Nec Casio Mobile Communications, Ltd., Kawasaki-shi, Kanagawa, JP;
Yasuharu Onishi, Kawasaki, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An electroacoustic transducer comprises a plurality of layered piezoelectric vibrator units that are arranged side by side in a direction intersecting a vibrating direction, wherein the plurality of layered piezoelectric vibrator units comprise respectively, a plurality of piezoelectric vibrators with different resonance frequencies, arranged in the vibrating direction in layers with a predetermined space therebetween; a plurality of vibrating members that hold the plurality of piezoelectric vibrators respectively; and a frame that supports edges of the plurality of vibrating members, and the plurality of vibrating members are arranged in the vibrating direction in layers with a predetermined space therebetween such that an area of the each of the plurality of vibrating members increases or decreases monotonically in the vibrating direction.