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. 09, 2008
Filed:
Oct. 02, 2006
Ernest C. Weyhrauch, Richmond, KY (US);
Matthew B. Ballenger, Lexington, KY (US);
George B. Kendrick, Lexington, KY (US);
Brent J. Eastwood, Lexington, KY (US);
Ernest C. Weyhrauch, Richmond, KY (US);
Matthew B. Ballenger, Lexington, KY (US);
George B. Kendrick, Lexington, KY (US);
Brent J. Eastwood, Lexington, KY (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
A method for converting a line voltage to an RMS load voltage in a lamp includes providing a control circuit which includes a switch and a microcontroller that operates the switch to establish an RMS load voltage for the lamp. The load voltage of the lamp is sensed and the sensed load voltage is compared in the microcontroller to a reference RMS voltage. Operation of the switch is adjusted in response to the comparison so that the RMS load voltage is substantially constant at the reference RMS voltage over a first operating range of the line voltage and so that the RMS load voltage decreases with decreasing line voltage at non-zero line voltages less than the first operating range.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile