Patent ID: 7990081

Claim:
A method of controlling an LED based lighting product having a plurality of LEDs, the method comprising: generating a first base clock, the first base clock defining a first clock domain; generating, within the first clock domain, a plurality of pulse width modulated LED control signals, each of the plurality of pulse width modulated LED control signals being associated with at least one LED; generating, within the first clock domain, a pulse width modulated group dimmer signal; and logically combining the group dimmer signal with each of the plurality of pulse width modulated LED control signals; wherein the group dimmer signal is generated such that the shortest pulse of the group dimmer signal is longer than the longest pulse of any of the plurality of pulse width modulated LED control signals; wherein generating each of the plurality of pulse width modulated LED control signals is based, at least in part, on the content of a control register associated with a pulse width modulator for each of the plurality of pulse width modulated LED control signals; and wherein generating the group dimmer signal is based, at least in part, on the content of a control register associated with a pulse width modulator for the group dimmer signal.