Samsung Electro-mechanics Co., Ltd.

Jung Won Hwang

Ho Young Kim

Ju Rae Kim

Jun Boum Lim

Sook Gyu Min

Jeong Won Yun

A backlight assembly includes a switching section for switching on/off an input voltage so as to output a primary voltage in accordance with a control signal; and a voltage boosting section for boosting the primary voltage received at a primary side thereof to a secondary voltage at a secondary side thereof. The primary and secondary sides of the voltage boosting section are electrically isolated from each other. In a feedback link for supplying the control signal from the secondary side to the primary side, a signal isolation section is provided for both transmitting the control signal between and electrically isolating primary side and secondary side portions of the feedback link. Additionally or alternatively, a balancing circuit section is connected between the secondary side of the voltage boosting section and a plurality of lamps so as to uniformly supply an alternating current, generated by the secondary voltage, to the lamps, in order to uniformize the luminances of the lamps.

Backlight assembly having voltage boosting section with electrically isolated primary side and secondary side

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.

Growing community of inventors

Suwon, South Korea

Jung Won Hwang