Dimmable, single stage fluorescent lamp

Details Dimmable, single stage fluorescent lamp Dimmable, single stage fluorescent lamp

1998-04-17

1999-11-09

Riley, Shawn

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323908, 315247, G05F 140, H05B 3702

Patent

active

059821590

ABSTRACT:
A dimmable fluorescent lamp including a feedback circuit for drawing sufficient current to maintain an appropriate charge across the buffer capacitor. A bypass capacitor provides a path for diverting a portion of the power which would otherwise be fed back to the buffer capacitor during low level dimming. Consequently, overboost voltages across the buffer capacitor during low level dimming are substantially reduced.

REFERENCES:
patent: 4375608 (1983-03-01), Kohler
patent: 4511823 (1985-04-01), Eaton et al.
patent: 4782268 (1988-11-01), Fahnrich et al.
patent: 4808887 (1989-02-01), Fuhnrich et al.
patent: 5303140 (1994-04-01), Shimizu
patent: 5412287 (1995-05-01), Shackle
patent: 5521467 (1996-05-01), Statnic et al.

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