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. 22, 2004
Filed:
Jan. 23, 2002
Michael H. Gurin, Glenview, IL (US);
Ken Roll, Oberlin, OH (US);
CogniTek Management Systems, Northfield, IL (US);
Abstract
A control algorithm and method to achieve arc stabilization for a gas discharge lamp having a light transmissive arc tube excitable to a discharge state upon introduction of a drive signal having a predetermined frequency associated therewith, includes a discrete modulating algorithm effective for providing a modulating signal which is imposed onto the drive signal. The modulating signal has a periodic cycling of discrete stepped frequencies that minimizes the acoustic resonance of the gases within the lamp. The control algorithm and method provides an effective stabilization of the gas discharge lamp's arc throughout the entire operating range of the lighting system.