Patent ID: 9368073
Filing Date: 2016-06-14
CPC Classification: G09G,H05B

Claim Text:
1. A light emitting diode (LED) backlight driving circuit, comprising: a plurality of voltage booster circuits parallelly connected, for converting an input voltage into a needed output voltage to supply to an LED unit, and a plurality of constant current driving integrated circuit (IC), for controlling the plurality of voltage booster circuits, so that the voltage booster circuits convert the input voltage into the needed output voltage to supply to the LED unit, driving the LED unit in a constant current; wherein the plurality of constant current driving IC generates driving signals at different frequencies to control the plurality of voltage booster circuits respectively, wherein each of the constant current driving ICs generates a driving signal at a different frequency from those of other driving signals generated from the other constant current driving ICs, to control corresponding voltage booster circuits, wherein each of the constant current driving ICs is connected to a frequency control resistance, for controlling the driving signals at the different frequencies generated by the constant current driving ICs, and the frequency control resistances are variable resistors.