Identification of a defective filament in a fluorescent lamp

Details Identification of a defective filament in a fluorescent lamp Identification of a defective filament in a fluorescent lamp

2011-03-29

2011-03-29

Natalini, Jeff (Department: 2858)

Electricity: measuring and testing

Electric lamp or discharge device

Electric lamp

C315S224000

Reexamination Certificate

active

07915896

ABSTRACT:
Control of delivery of current through one or more discharge lamps. Methods include alternately switching on and off switching elements that control a fluorescent lamp, in response to receiving input, until the brightness of the lamp decreases to a threshold. Further, methods include providing control signals at complementary duty cycles to further decrease the brightness and alternating the duty cycles of the signals applied to the filaments of the fluorescent lamp.

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