Patent ID: 8077139
Filing Date: 2011-12-13
Classification: H05B

Abstract:
1. A driving circuit of a backlight module, wherein the backlight module includes a first light-emitting diode (LED) unit, the driving circuit comprising: a voltage conversion unit, coupled to a first end of the first LED unit for providing a driving voltage to the first LED unit; a current adjusting unit, coupled to a second end of the first LED unit for adjusting a conducted current of the first LED unit according to a first current adjusting signal; a current mapping unit, outputting a reference voltage; and a dimming unit, coupled between the current mapping unit and the current adjusting unit, and comprising a plurality of driving units, wherein a first driving unit outputs the first current adjusting signal according to a first pulse width modulation (PWM) signal, a first enable signal and the reference voltage, wherein the first driving unit comprises: