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:
Jun. 24, 2008
Filed:
Apr. 22, 2004
Fred C. Lee, Blacksburg, VA (US);
Jinghai Zhou, Santa Clara, CA (US);
Yan Jiang, Blacksburg, VA (US);
Masanao Okawa, Woburn, MA (US);
Dung A. Tran, Wakefield, MA (US);
Hiroyasu Eriguchi, Lexington, MA (US);
Fred C. Lee, Blacksburg, VA (US);
Jinghai Zhou, Santa Clara, CA (US);
Yan Jiang, Blacksburg, VA (US);
Masanao Okawa, Woburn, MA (US);
Dung A. Tran, Wakefield, MA (US);
Hiroyasu Eriguchi, Lexington, MA (US);
Matsushita Electric Works, Ltd., Osaka, JP;
Virginia Tech Intellectual Properties, Inc., Blacksburg, VA (US);
Abstract
A discharge lamp lighting control device () having a DC power converter, a power factor improving power converter (), a polarity reversing circuit (), a starter circuit (), and a controller (). The power factor improving power converterincludes a switching device S, a power factor improver, and a power converter. The power factor improver operates to smooth a rectified voltage by storing energy in a first inductive device Land by discharging energy from a second inductive device L, in which the first and second inductive devices are magnetically coupled together. The storing and discharging is performed by turning ON and OFF the switching device S. A predetermined DC voltage is converted by energy stored and discharged by a third inductive device Lin response to the turning ON and OFF of the switching device S.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile