Inverter circuit, backlight assembly, liquid crystal display...

Details Inverter circuit, backlight assembly, liquid crystal display... Inverter circuit, backlight assembly, liquid crystal display...

2006-09-14

2009-02-17

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S278000, C315S312000, C345S102000

Reexamination Certificate

active

07492106

ABSTRACT:
A backlight assembly prevents abnormal discharge of a device using a high voltage to drive a discharge tube such as CCFL. An inverter circuit includes an inverter transformer supplying an AC high voltage to a plurality of discharge tubes, and a plurality of balance transformers. First terminals of primary coils of the balance transformers are connected to the discharge tubes, and second terminals of the primary coils are connected to a ground. Secondary coils of the balance transformers are connected in series to form a loop. A resistor has a first terminal connected to the loop and a second terminal connected to the ground. Accordingly, the backlight assembly may detect a high-voltage abnormal discharge such as a corona discharge, an arc discharge or the like.

REFERENCES:
patent: 7119495 (2006-10-01), Jang
patent: 7294971 (2007-11-01), Jin
patent: 7309964 (2007-12-01), Wey et al.
patent: 2004/0257003 (2004-12-01), Hsieh et al.
patent: 2005/0253537 (2005-11-01), Jang et al.
patent: 2006/0125424 (2006-06-01), Gray
patent: 2006/0290453 (2006-12-01), Park et al.
patent: 2000-197368 (2000-07-01), None
patent: 2002-141186 (2002-05-01), None
patent: 2002-341775 (2002-11-01), None
patent: 2005-183099 (2005-07-01), None

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