Dimming ballast and method

Details Dimming ballast and method Dimming ballast and method

2007-07-24

2007-07-24

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Pulsating or a.c. supply to the cathode or heater circuit

C315S219000, C315S291000, C315S2090SC, C315S244000, C315S276000, C315SDIG002, C315SDIG002

Reexamination Certificate

active

11300841

ABSTRACT:
A ballast lamp circuit and method of operation is disclosed. The ballast lamp circuit comprising an inverter circuit and cathode heating circuit, wherein a lamp current, generated by the inverter circuit, is inversely proportional to a lamp cathode voltage generated by the cathode heating circuit.

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patent: 2006/0103317 (2006-05-01), Chen et al.

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