BACKLIGHT DRIVING CIRCUIT, BACKLIGHT MODULE, AND LCD DEVICE

摘要

A backlight driving circuit includes a power supply module, an inductor connected with an output end of the power supply module, and a light emitting diode (LED) lightbar connected with the inductor in series. A monitoring module detecting an output current of the inductor is coupled between the inductor and the LED lightbar. A controllable switch is connected between an output end of the inductor and a grounding terminal of the backlight driving circuit. The monitoring module is coupled with the controllable switch. When the output current of the inductor is lower than a preset value, the monitoring module controls the controllable switch to turn on.