Hon Hai Precision Industry Co., Ltd.

Yi-Cheng Liu

Chih-Chan Ger

Chen-An Chiang

Chia-Peng Wang

Wen-Lin Chen

A-Jung Chang

Hui-Chen Chou

A driving device for driving a lamp (L) includes a power stage circuit (), a transformer circuit (), a voltage dividing circuit (), an inrush current sensing circuit (), and a controller circuit (). The power stage circuit converts a received direct current (DC) signal to an alternating current (AC) signal. The transformer circuit is connected to the power stage circuit, for converting the AC signal to an appropriate signal to drive the lamp. The voltage dividing circuit is connected to the transformer circuit, for dividing voltage of the signal output from the transformer circuit. The inrush current sensing circuit is connected to the voltage dividing circuit, for sensing inrush current output from the transformer circuit. The controller circuit is connected to the power stage circuit, for controlling output of the power stage circuit according to output of the inrush current sensing circuit.

Device for driving light sources

A driving device for driving a light source module () includes an input current limiting circuit () and an inverter (). The input current limiting circuit includes an input current sensing circuit () and a feedback compensation circuit (), for limiting current of an input power signal of the driving device to a predetermined range. The input current sensing circuit is used for sensing a current signal of the input power signal of the driving device. The feedback compensation circuit is connected to the input current sensing circuit, for outputting a compensation signal according to the sensed current signal. The inverter is connected between the input current limiting circuit and the light source module, and includes a feedback circuit (). The feedback circuit is connected to the feedback compensation circuit, for receiving the compensation signal and feeding back current flowing through the light source module.

Input current limiting circuit and driving device using the same

A power supply system for powering backlight lamps in a flat panel display with reduced dimensions and increased power efficiency. The power supply system includes a converter circuit for converting an alternating current (AC) signal from an AC power source to a high direct current (DC) signal, and a high voltage (HV) inverter system that includes a power stage circuit, a transformer circuit, and a current balance circuit. The HV inverter system is coupled to the converter circuit and specifically configured to convert the high DC signal into an AC output signal to power the backlight lamps.

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Taipei Hsien, Taiwan

Yi-Cheng Liu