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. 25, 2001
Filed:
Nov. 02, 1999
Gueorgui L. Grouev, Arlington Heights, IL (US);
Kent E. Crouse, Schaumburg, IL (US);
Donald G. Huvaere, Palatine, IL (US);
William L. Keith, Algonquin, IL (US);
Energy Savings, Inc., Schaumburg, IL (US);
Abstract
A digitally controlled electronic ballast, on command, optically transmits its identification signature or other data by CW modulation of the luminosity of one or more lamps connected to the ballast. The data is transmitted by momentarily interrupting the lamp current to mark the beginning and the end of successive periods, wherein the periods represent either a logic one or a logic zero in accordance with the data to be transmitted. Each ballast has a unique identification, which is included in the transmitted digital data. A receiver monitors the luminosity of a lamp and compares instantaneous luminosity to average luminosity to detect the beginning and end of each period.