Lamp driving system

Details Lamp driving system Lamp driving system

2006-07-11

2006-07-11

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S282000, C315S312000

Reexamination Certificate

active

07075248

ABSTRACT:
A system driving a lamp set having a first lamp and a second lamp is provided. The system has a power supply circuit providing an AC signal to the lamp set, and a balance circuit having a current balancing transformer, a first impedance and a second impedance for balancing currents through the first and second iamps. The current balancing transformer includes a first winding and a second winding. The first and second windings are wound on the same magnetic core and have the same winding count. A specific relationship between the first and second impedances balances the current values through the first and second lamps effectively without increasing inductances of the current balancing transformer.

REFERENCES:
patent: 6534934 (2003-03-01), Lin et al.
patent: 6674247 (2004-01-01), Mead et al.
patent: 6717372 (2004-04-01), Lin et al.
patent: 6781325 (2004-08-01), Lee
patent: 478292 (2002-03-01), None

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