An inverter driven lamp arrangement having a current detection c

Details An inverter driven lamp arrangement having a current detection c An inverter driven lamp arrangement having a current detection c

1993-04-15

1995-08-22

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315209R, 315308, 315DIG7, 315DIG5, H05B 4136

Patent

active

054443369

ABSTRACT:
The present invention relates to an inverter driven lamp arrangement. The arrangement provides for the sensing of both lamp voltage and current. The arrangement also provides for a large current during times of low voltage and a small current during times of high voltage. The sensing of lamp current is done by a current detector that is connected to a resonance circuit whose output is applied in signal form to a lamp start control circuit. The resonant circuit is a series connected resonant circuit composed of a choke coil and a first capacitor. This series connected arrangement is further connected in series with a second non-resonant capacitor. Also the arrangement includes circuitry to gradually reduce the frequency of the inverter just after the lamp starts.

REFERENCES:
patent: 3611021 (1971-10-01), Wallace
patent: 4791338 (1988-12-01), Dean et al.
patent: 4914558 (1990-04-01), Flickinger
patent: 4935672 (1990-06-01), Lammers et al.
patent: 5083065 (1992-01-01), Sakata et al.

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