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:
May. 11, 1999
Filed:
Feb. 14, 1997
Koji Ogiso, Moriyami, JP;
Akira Ando, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A piezoelectric transformer has a plate shaped piezoelectric member including a driving section disposed at one portion of the piezoelectric member including one end thereof and a power-generating section at the other portion of the piezoelectric member including the other end thereof. The driving section includes driving electrodes and a portion of the piezoelectric member which is polarized in the thickness direction. The power-generating section includes a power-generating electrode and a portion of the piezoelectric member polarized in the longitudinal direction. At least one polarization electrode which is exposed in part on a surface of the piezoelectric member is provided between the driving section and the power-generating electrode. The degree of polarization in a portion of the power generating section located between the driving section and the at least one polarization electrode is lower than the degree of polarization in a portion of the power generating section located between the power-generating electrode and the at least one polarization electrode.