Current balancing circuit

Details Current balancing circuit Current balancing circuit

2007-09-06

2009-10-20

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S277000, C315S274000, C315S2090SC, C315S312000

Reexamination Certificate

active

07605544

ABSTRACT:
A current balancing circuit for first and second lamp sets includes a step-up transformer and a current balancer. The step-up transformer is adapted to be coupled to a power supply for receiving an alternating-current source power, and for generating a drive signal by varying magnitude of the alternating-current source power. The step-up transformer is further adapted to be coupled to the first and second lamp sets for providing the drive signal thereto. The current balancer includes first and second shunt transformers. Each of the first and second shunt transformers includes primary and secondary windings that correspond to each other in number of turns thereof. The first and second shunt transformers are adapted to be coupled to corresponding discharge lamps of the first lamp set. The current balancer is adapted to mirror current flowing through the first and second shunt transformers to the second lamp set.

REFERENCES:
patent: 6781325 (2004-08-01), Lee
patent: 7319296 (2008-01-01), Meng et al.
patent: 2005/0093472 (2005-05-01), Jin
patent: 2007/0126369 (2007-06-01), Meng et al.
patent: 1 517 591 (2005-03-01), None

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