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. 18, 2008
Filed:
Oct. 31, 2005
Masakazu Ushijima, Tokyo, JP;
Masakazu Ushijima, Tokyo, JP;
Other;
Abstract
A high efficiency current resonance inverter circuit for a discharge lamp includes: a step-up transformer, a primary winding of the step-up transformer having a center tap being connected to a power source side, two other terminals of the primary winding being connected to collectors of two transistors, respectively, emitters of the two transistors being connected to respective terminals of a primary winding of a current transformer having a center tap, the center tap of the current transformer being connected to a ground side. A secondary winding of the current transformer is connected to bases of the two transistors to detect emitter currents of the two transistors in order to detect a resonance current, thereby performing oscillation. When the current resonance inverter circuit is used for a discharge lamp, the need for a conventional collector resonance inverter circuit is eliminated.