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:
Sep. 17, 2019
Filed:
Sep. 05, 2017
Taiyo Yuden Co., Ltd., Chuo-ku, Tokyo, JP;
Gouki Watanabe, Takasaki, JP;
Takayuki Goto, Takasaki, JP;
Keiichi Hatano, Takasaki, JP;
Sumiaki Kishimoto, Takasaki, JP;
Yutaka Doshida, Takasaki, JP;
TAIYO YUDEN CO., LTD., Tokyo, JP;
Abstract
A piezoelectric ceramic speaker includes a piezoelectric element using a vibration sheet formed with piezoelectric ceramic having a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains, wherein the primary phase is constituted by ceramic grains expressed by a composition formula Pb {(ZrTi)·(NiNb)·(ZnNb)}O(where 0<x≤0.85, 0≤y<1, 0<z<1, x+y+z=1, and 0.45≤a≤0.60); and an enclosure which encloses the piezoelectric element.