Patent ID: 7843148

Claim:
A light emitting diode (LED) driver for driving LEDs connected to different parallel paths, the driver comprising: a voltage source for connection to first ends of LEDs in a plurality of parallel paths; a plurality of current set circuits, one current set circuit per parallel path, each current set circuit controlling a peak current through one or more LEDs connected in each parallel path; and a pulse-width modulated (PWM) brightness control signal generator connected to the plurality of current set circuits, the brightness control signal generator being configured to generate staggered PWM brightness control signals to the plurality of current set circuits, each current set circuit being configured to draw the peak current through its associated one or more LEDs at a duty cycle substantially corresponding to a duty cycle of a PWM brightness control signal applied to it, such that the plurality of current set circuits conduct current through their associated one or more LEDs at the same duty cycle but out of phase with each other.