Lighting circuit for discharge lamp

Details Lighting circuit for discharge lamp Lighting circuit for discharge lamp

1998-08-26

2000-03-07

Philogene, Haissa

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Inductance in the condenser circuit

315126, 315209R, 315307, 315DIG5, 315DIG7, H05B 3700

Patent

active

060344873

ABSTRACT:
A lighting circuit for a discharge lamp comprises a DC power supply circuit having a coil and a capacitor at its input stage, a DC-AC converter for converting the output voltage of the DC power supply circuit to an AC voltage and supplying the AC voltage to a discharge lamp, ignition means for generating an ignition pulse to the discharge lamp, and control means for performing variable control on the output voltage of the DC power supply circuit 3. The control means 6 performs such a boosting operation as to boost the output voltage of the DC power supply circuit 3 to a predetermined voltage under a loadless condition while the ignition pulse generated by the ignition means 5 is supplied to the discharge lamp 11 to thereby light the discharge lamp 11. During the boosting operation, the ignition means 5 applies the ignition pulse to the discharge lamp 11, lighting the discharge lamp.

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