Circuit arrangement for ingniting and supplying power to a lamp

Details Circuit arrangement for ingniting and supplying power to a lamp Circuit arrangement for ingniting and supplying power to a lamp

1997-04-18

1998-12-01

Lee, Benny

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315225, 315224, 315209R, 315244, 315DIG7, G05F 100

Patent

active

058443800

ABSTRACT:
A circuit arrangement for igniting and supplying a discharge lamp by means of a substantially square-wave voltage at a frequency f1. It is possible to dim the lamp by adjusting the frequency of the substantially square-wave voltage to a value f2 which is different from f1. A protection circuit prevents damage to the lamp and to the circuit arrangement if the lamp current does not flow any more at the frequency f2.

REFERENCES:
patent: 5089751 (1992-02-01), Wong et al.
patent: 5099176 (1992-03-01), Fellows et al.
patent: 5381076 (1995-01-01), Nerone
patent: 5463284 (1995-10-01), Mattas
patent: 5528117 (1996-06-01), Bwij et al.

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