Patent ID: 8111023

Claim:
A control system for three light emitting diodes emitting respectively three different colors, said control system comprising: a clock unit for providing a first clock signal, and a second clock signal having a frequency lower than that of the first clock signal; and three control units coupled to said clock unit, and adapted to be coupled respectively to the light emitting diodes, each of said control units receiving the first and second clock signals from said clock unit and being operable based on the first and second clock signals received thereby, and a corresponding set of first and second reference values to output a driving pulse signal having a pulse width associated with the first clock signal to a corresponding one of the light emitting diodes during a corresponding one of first, second and third time periods that constitute a control cycle of said control system, the corresponding one of the first, second and third time periods being associated with the corresponding set of the first and second reference values such that the corresponding one of the light emitting diodes is driven by the driving pulse signal to emit light during the corresponding one of the first, second and third time periods of the control cycle.