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AssigneeGeneral Electric Company
InventorsJames Dominic Mieskoski, Gang Yao
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This disclosure describes embodiments of a lighting device with circuitry that can manage current and voltage levels across a plurality of fluorescent lamps. In one embodiment, the circuitry has cross-coupled inductors in series with a pair of lamp sockets. This configuration of components causes fluorescent lamps installed in the lamp sockets to generate substantially the same amount of light by drawing approximately equivalent current throughout the entire operable range of a dimmer control. The circuitry also includes a protection circuit with a winding magnetically coupled with the cross-coupled inductors and a control circuit that can cause impedance across the winding to change from a first impedance to a second impedance in response to operating conditions in the lamps. This feature avoids high operating voltages that can occur across the cross-coupled inductors when one of the fluorescent lamps is inoperable and/or removed from the lamp sockets.
A lighting device, comprising:
A lighting device with a first lamp and a second lamp, said lighting device comprising:
A ballast circuit for a lighting device comprising a pair of fluorescent lamps, said ballast circuit comprising:
Dependencies are inferred from the claim text.