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:
Aug. 16, 2005
Filed:
Nov. 17, 2003
Jörg Lott, Chieming, DE;
Jörg Lott, Chieming, DE;
Abstract
The invention relates to a method for operating at least one low-pressure discharge lamp using an inverter (T, T), the occurrence of a rectifier effect in the at least one low-pressure discharge lamp (FL, FL) being monitored during the operation of the at least one low-pressure discharge lamp (FL, FL) in order to determine the end of its life. For the purpose of monitoring the rectifier effect of the at least one low-pressure discharge lamp (FL, FL), the electric power (P) fed into the inverter (T, T), the d.c. voltage drop (U, U) across the electric connections of the at least one low-pressure discharge lamp (FL, FL) and the r.m.s. value (U) of the a.c. voltage component of the running voltage of the at least one low-pressure discharge lamp (FL, FL) are evaluated.