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:
Dec. 31, 2002
Filed:
Dec. 22, 2000
Masaaki Totsuka, Tsurugashima, JP;
Kachiyasu Satoh, Tsurugashima, JP;
Takahiro Inokuchi, Tsurugashima, JP;
Toshihiro Takahashi, Tsurugashima, JP;
Toko Kabushiki Kaisha, Tokyo-To, JP;
Abstract
A piezoelectric transformer driving circuit comprises a piezoelectric transformer which boosts an input voltage to obtain a voltage required in igniting a cold cathode tube, a restart circuit which detects the voltage output from said piezoelectric transformer and allows said piezoelectric transformer to repeatedly output a high voltage required in initially igniting said cold cathode tube, a PWM controller which allows said piezoelectric transformer to intermittently output a voltage in order to adjust the brightness of said cold cathode tube, and a stopping unit which stops the control operation of said PWM controller when restart circuit is operative.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile