Multiple lamp driving device comprising balance transformer

Details Multiple lamp driving device comprising balance transformer Multiple lamp driving device comprising balance transformer

2009-05-26

2011-12-20

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

C315S254000, C315S255000, C315S279000, C315S291000, C315S299000

Reexamination Certificate

active

08080945

ABSTRACT:
The present invention provides a multiple lamp driving capable of being applied to a multiple lamp system such as an LCD, wherein the multiple lamp driving device includes: a power supply unit for supplying a driving voltage to a lamp unit provided with first to 4nth lamps; and a balancing circuit unit including first to nth balance transformers for receiving the driving voltage from the power supply unit and balancing currents flowing through the first to 4nth lamps, wherein each of the first to nth balance transformers includes a primary side connected to the power supply unit in series and first and second secondary sides electrically connected to the primary side, each one end of the first and second secondary sides is connected to one end of one of the first to 4nth lamps, each of the other ends of the first and second secondary sides is connected to one end of another among the first to 4nth lamps, and the other ends of all of the first to 4nth lamps are connected to a ground.

REFERENCES:
patent: 3496478 (1970-02-01), Heinrich et al.
patent: 7088213 (2006-08-01), Chien et al.
patent: 7309964 (2007-12-01), Wey et al.
patent: 7663322 (2010-02-01), Kim et al.
patent: 2007/0126369 (2007-06-01), Meng et al.
patent: 2007/0217183 (2007-09-01), Meng et al.
patent: 2009/0009097 (2009-01-01), Li et al.

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