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. 02, 2008
Filed:
Apr. 01, 2005
George B. Kendrick, Lexington, KY (US);
Ernest C. Weyhrauch, Cookeville, TN (US);
Matthew B. Ballenger, Lexington, KY (US);
George B. Kendrick, Lexington, KY (US);
Ernest C. Weyhrauch, Cookeville, TN (US);
Matthew B. Ballenger, Lexington, KY (US);
OSRAM Sylvania Inc., Danvers, MA (US);
Abstract
A lamp contains a lamp voltage conversion circuit which includes a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control clipping circuit has a time-based pulse source that triggers conduction of the phase-control clipping circuit independently of line voltage magnitude during time periods spanning polarity changes of the load voltage that are separated by intervals when conduction is not triggered.