Patent ID: 9001109
Filing Date: 2015-04-07
Classification: G09G,H05B

Abstract:
1. A light emitting diode (LED) backlight driving circuit, comprising: a light emitting diode (LED) lightbar; wherein an output end of the light emitting diode (LED) lightbar is connected with a control integrated circuit (IC) in series, and is also connected with a shunt controllable switch; and wherein the shunt controllable switch is switched on when a voltage of the output end of the light emitting diode (LED) lightbar exceeds a preset value and is switched off when the voltage is less than the preset value; and wherein a control end of the shunt controllable switch is connected with an operational amplifier (OP) module; a feedback resistor is connected in series between an output end of the shunt controllable switch and a power grounding terminal; a first input end of the OP module is coupled to the output end of the LED lightbar; and a second input end of the OP module is coupled between the shunt controllable switch and the feedback resistor.