Multiple lamp balance transformer and drive circuit

Details Multiple lamp balance transformer and drive circuit Multiple lamp balance transformer and drive circuit

2007-07-10

2007-07-10

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S282000, C315S274000, C315S312000

Reexamination Certificate

active

11168512

ABSTRACT:
The invention describes a multiple lamp balance transformer and a drive circuit. The multiple lamp balance transformer has two magnetic cores with a closed magnetic flux path and two coils wound around the closed magnetic flux path. The two coils have the same number of windings. The impedance property of the coil and Lenz's Law are used to balance the operating current of the lamps connected to the coils. The drive circuit has a multiple lamp balance transformer connected to several lamps, and a boost transformer uses a controller to supply the current and voltage to the lamps. A current detect/protect circuit connected to the coils and the controller detects the current passing through the coils and converts the operating current of the lamp into a voltage to be sent to the controller, so that the controller controls and provides sufficient power to the lamps.

REFERENCES:
patent: 6717371 (2004-04-01), Klier et al.
patent: 6717372 (2004-04-01), Lin et al.
patent: 7075248 (2006-07-01), Hsieh et al.
patent: 7190123 (2007-03-01), Lee

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