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. 04, 2002
Filed:
Jul. 13, 2000
Norbert Primisser, Fraxern, AT;
Reinhard Böckle, Mäder, AT;
Stefan Koch, Dornbirn, AT;
Stefan Rhyner, Niederurnen, CH;
Tridonic Bauelemente GmbH, Dornbirn, AT;
Abstract
Process for the recognition of the rectifier effect appearing in a gas discharge lamp (G , G ) and an electronic ballast, for the operation of gas discharge lamps (G , G ), with which such a process finds employment. The electronic ballast includes a monitoring or control circuit (IC ) which monitors an operating parameter of a load circuit (E) of the electronic ballast, whereby this operating parameter corresponds to the lamp voltage or is dependent thereon. The monitoring circuit (IC ) integrates this monitored operating parameter over a full period and determines upon the presence of a rectifier effect if the integration result deviates from a predetermined integration desired value. Further, for the recognition of the rectifier effect, the duration of the positive and negative half-waves of the monitored parameter can be compared.