Patent ID: 7486032

Claim:
An apparatus for driving light emitting diode arrays, comprising: a dimming/size setter for setting each of driving voltages for a plurality of red, green and blue light emitting diode arrays in response to at least one of a dimming signal and a size control signal inputted from outside; a plurality of red light emitting diode array driving circuits each commonly connected to the dimming/size setter, each of the red light emitting diode array driving circuits switching on/off a supply voltage by a phase width modulation to supply the driving voltage set by the dimming/size setter; a plurality of green light emitting diode array driving circuits each commonly connected to the dimming/size setter, each of the green light emitting diode array driving circuits switching on/off a supply voltage by a phase width modulation to supply the driving voltage set by the dimming/size setter; and a plurality of blue light emitting diode array driving circuits each commonly connected to the dimming/size setter, each of the blue light emitting diode array driving circuits switching on/off a supply voltage by a phase width modulation to supply the driving voltage set by the dimming/size setter.