Method for operating at least one low-pressure discharge...

Details Method for operating at least one low-pressure discharge... Method for operating at least one low-pressure discharge...

2006-06-20

2006-06-20

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S312000, C363S132000

Reexamination Certificate

active

07064499

ABSTRACT:
The invention relates to a method for operating at least one low-pressure discharge lamp using an inverter, during the operation of the at least one low-pressure discharge lamp the occurrence of a rectifier effect in the at least one low-pressure discharge lamp being monitored 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, the DC voltage drop across the electrical connections of the at least one low-pressure discharge lamp and the current through the at least one low-pressure discharge lamp are evaluated.

REFERENCES:
patent: 4117400 (1978-09-01), Feldman
patent: 5359274 (1994-10-01), Bandel
patent: 5569984 (1996-10-01), Holtslag
patent: 5623187 (1997-04-01), Caldeira et al.
patent: 6198231 (2001-03-01), Schemmel et al.
patent: 6232727 (2001-05-01), Chee et al.
patent: 6794828 (2004-09-01), Tyson
patent: WO 99/56506 (1999-11-01), None
European Patent Office Search Report (referencing document listed above) dated Nov. 2004.

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