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...

2005-08-16

2005-08-16

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S224000, C315SDIG007

Reexamination Certificate

active

06930454

ABSTRACT:
The invention relates to a method for operating at least one low-pressure discharge lamp using an inverter (T1, T2), the occurrence of a rectifier effect in the at least one low-pressure discharge lamp (FL1, FL2) being monitored during the operation of the at least one low-pressure discharge lamp (FL1, FL2) 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 (FL1, FL2), the electric power (P) fed into the inverter (T1, T2), the d.c. voltage drop (Udc1, Udc2) across the electric connections of the at least one low-pressure discharge lamp (FL1, FL2) and the r.m.s. value (Uac) of the a.c. voltage component of the running voltage of the at least one low-pressure discharge lamp (FL1, FL2) are evaluated.

REFERENCES:
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European Patent Office Search Report (referencing all documents listed above) dated Mar. 29, 2004.

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