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:
Apr. 27, 2004
Filed:
Sep. 28, 2002
John G. Konopka, Deer Park, IL (US);
Sivakumar Thangavelu, Rolling Meadows, IL (US);
Sameer Sodhi, Vernon Hills, IL (US);
Osram Sylvania, Inc., Danvers, MA (US);
Abstract
A dimming control system includes a first circuit ( ) and a second circuit ( ). First circuit ( ) is coupled in series with the AC line source ( ) and receives brighten and dim commands from a user. The brighten and dim commands are communicated to second circuit ( ) by momentarily altering the AC voltage waveforms observed by second circuit ( ). Second circuit ( ) provides an adjustable output signal that is coupled to inverter circuitry within an electronic dimming ballast. The output signal is adjusted by the second circuit ( ) in dependence on the observed AC voltage waveforms.