Fluorescent lamp driver and liquid crystal display apparatus

Details Fluorescent lamp driver and liquid crystal display apparatus Fluorescent lamp driver and liquid crystal display apparatus

2005-05-11

2008-07-08

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S274000, C315S291000, C315S307000, C315S312000

Reexamination Certificate

active

07397198

ABSTRACT:
In order to suppress leak current at the time of high voltage application to a fluorescent lamp so as to improve the luminous efficiency, the present invention provides a fluorescent lamp driver, which includes switching means that switches a DC power supply voltage, and a first transformer and a second transformer configured to obtain AC voltages each having reverse polarity, as AC voltages excited from primary winding to secondary winding of the respective transformers, on the basis of output voltages of the switching means, in which the first transformer and the second transformer are positioned in the vicinity of both ends of the fluorescent lamp, and the AC voltage obtained in the secondary winding of the first transformer is applied to one terminal of the fluorescent lamp and the AC voltage obtained in the secondary winding of the second transformer is applied to the other terminal of the fluorescent lamp.

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