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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.:

US 6794796 B1

PDFFull Text
Expired
Date of Patent:
Sep. 21, 2004

Filed:

Jan. 09, 2003

Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer

Applicant:
Inventors:

Hiroshi Nakatsuka, Neyagawa, JP;

Katsunori Moritoki, Takatsuki, JP;

Toshiyuki Asahi, Osaka, JP;

Kojiro Okuyama, Ikoma, JP;

Osamu Kawasaki, Kyotanabe, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka, JP;

Attorney:

Smith, Gambrell & Russell, LLP

Primary Examiner:

Mark Budd

Int. Cl.
CPC ...
H01L 4/108 ;
U.S. Cl.
CPC ...
H01L 4/108 ;
Abstract

The piezoelectric transformer of the present invention has a piezoelectric element mainly formed of a piezoelectric material, primary electrodes U and D which are formed on the piezoelectric element and to which a voltage is applied, a secondary electrode which is formed on the piezoelectric element and from which a voltage higher than the voltage applied to the primary electrode is output, and a sensor electrode which is formed on the piezoelectric element and from which a voltage lower than the output voltage of the secondary electrode is output.

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Nakatsuka, Hiroshi. (2004). Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer (U.S. Patent No. 6794796). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6794796

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