Patent ID: 7843423

Claim:
A driving device for driving a light emitting unit comprising: a power supply for generating power to the light emitting unit according to a control signal; an active signal generator for generating an active signal sequence according to lighting features of the light emitting unit, each active signal of the active signal sequence comprising a first cycle; a heat-dissipation signal generator for generating a heat-dissipation signal sequence, each heat-dissipation signal of the heat-dissipation signal sequence comprising a second cycle; a multiplexer coupled to the active signal generator and the heat-dissipation signal generator for combining the active signal sequence and the heat-dissipation signal sequence, so as to generate a driving signal sequence, each driving signal of the driving signal sequence comprising a third cycle equal to a sum of the first cycle and the second cycle; a burst signal generator for generating a burst signal according to the lighting features of the light emitting unit, the burst signal comprising a forth cycle longer than the third cycle; and a logic unit coupled to the multiplexer, the burst signal generator and the power supply for timely outputting the driving signal sequence according to the burst signal, so as to generate the control signal.