Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Reexamination Certificate
2006-04-04
2006-04-04
Dinh, Trinh V (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
C315S219000, C315S244000, C315S247000, C345S102000, C345S087000
Reexamination Certificate
active
07023145
ABSTRACT:
Disclosed herein is a backlight inverter for a U-shaped lamp which is capable of detecting an abnormal state of an inverter circuit. The backlight inverter comprises a driver for supplying first and second transformer drive voltages in response to an operation control signal and cutting off the supply of the transformer drive voltages in response to a shutdown control signal, first and second transformers for boosting the transformer drive voltage in a turn ratio between primary and secondary windings thereof and supplying the resulting drive voltage to the U-shaped lamp, first and second voltage detectors for detecting voltages across the secondary windings, respectively, first and second current detectors for detecting currents flowing through the secondary windings of the first and second transformers, respectively, an inverter abnormal state detector for detecting an abnormal state of the inverter, and a driver controller for controlling a normal operation or shutdown of the driver.
REFERENCES:
patent: 5280333 (1994-01-01), Wunderer
patent: 5650925 (1997-07-01), Hesterman
patent: 6919693 (2005-07-01), Fushimi
patent: 2003/0071584 (2003-04-01), Lee et al.
patent: 2004/0051692 (2004-03-01), Hirakata ey al.
patent: 2004/0066149 (2004-04-01), Gray
Hwang Jung Won
Kim Ho Young
Kim Ju Rae
Dinh Trinh V
Ho Binh Van
Lowe Hauptman & Berner LLP
Samsung Electro-Mechanics Co. Ltd.
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