Patent ID: 8680780
Filing Date: 2014-03-25
Classification: G02F,H05B

Abstract:
1. A light emitting diode (LED) backlight driving circuit, comprising: a light emitting diode (LED) lightbar(s) and a control module comprising a dimming controllable switch; wherein the LED lightbars are connected with the dimming controllable switch in series, and two ends of the dimming controllable switch are connected with a varistor in parallel, an output end of the LED lightbar coupled with a clamping circuit for limiting a voltage of the dimming controllable switch, and wherein the clamping circuit comprises a storage capacitor and a discharge resistor which are connected in parallel; one end of the storage capacitor and the discharge resistor is coupled with a reference voltage, and the other end is coupled to the output end of the LED lightbar; the reference voltage is lower than a supply voltage.