Discharge-lamp lighting apparatus

Details Discharge-lamp lighting apparatus Discharge-lamp lighting apparatus

2007-05-15

2008-10-21

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S220000, C315S255000

Reexamination Certificate

active

07439686

ABSTRACT:
A discharge-lamp lighting apparatus includes first and second cold cathode fluorescent lamps (CCFLs) and first and second transformers. The first transformer has a primary winding and a secondary winding. The primary winding receives an AC voltage generated by turning on/off a first switching element pair that is connected to a first DC power source. The second transformer has a primary winding, a first secondary winding, and a second secondary winding. The primary winding of the second transformer receives an AC voltage generated by turning on/off a second switching element pair that is connected to a second DC power source. Polarities of the first and second secondary windings of the second transformer are set so that a voltages of each of the first and second secondary windings becomes additive to a voltage of the secondary winding of the first transformer.

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U.S. Appl. No. 11/748,888, filed May 15, 2007, USUI.
U.S. Appl. NO. 11/748,821, filed May 15, 2007, USUI.

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