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. 08, 2008
Filed:
Sep. 24, 2004
Takeshi Fujimura, Sendai, JP;
Masaaki Toyama, Saitama, JP;
Takeshi Fujimura, Sendai, JP;
Masaaki Toyama, Saitama, JP;
Taiheiyo Cement Corporation, Tokyo, JP;
Abstract
A piezoelectric transformer, which operates in a half wavelength mode, includes an input part having input electrodes laminated in a thickness direction on a central part in a longitudinal direction of a piezoelectric element with rectangular shape, in which the input part is polarized in the thickness direction between the input electrodes, a pair of output parts provided along the longitudinal direction so as to sandwich the input part, in which the output parts are polarized in the same direction along the longitudinal direction, and an output electrode provided at an end part of each of the output parts, wherein LLand Lsatisfy a relationship of 0.1≦(4L−L)/4L≦0.5, where Lis a length of the piezoelectric element in the longitudinal direction, Lis a length of the input part in the longitudinal direction, and Lis a length of either one of the output electrodes in the longitudinal direction.