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. 15, 1994
Filed:
Feb. 16, 1993
Jun Kawai, Tokyo, JP;
Satoru Tagami, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A piezoelectric transformer is constituted of a piezoelectric plate in the form of an elongated plate and electrodes formed thereon. A pair of driver sections and a generator section are formed in two opposite end regions of the piezoelectric plate containing a mechanical resonance node and in a central region of the piezoelectric plate containing a mechanical resonance node, respectively, in an oscillation mode of three times of 1/2 of the resonance wavelength .lambda. of the longitudinal mechanical oscillation in length of the piezoelectric plate. The driver sections are polarized in a thickness direction but in directions opposite to each other. The driver sections have a distance of .lambda./2 from the corresponding end of the piezoelectric plate.