Patent ID: 8106857

Claim:
A light driving device, comprising: a Light Emitting Diode (LED) pulse generator for generating a signal; a demultiplexer comprising a D flip-flop for converting the generated signal to a first control signal and a second control signal, wherein the D flip-flop comprises: a data input terminal; a clock terminal for receiving the generated signal as input; an output terminal for outputting the first control signal; and an inverting output terminal for outputting the second control signal, wherein the inverting output terminal is directly connected to the data input terminal such that the data input terminal receives the second control signal directly as input, and a first light driving circuit and a second light driving circuit that are respectively controlled by the first control signal and the second control signal; the D flip-flop further comprising a first diode having an anode coupled to the output terminal and a cathode coupled to the clock terminal, and a second diode having an anode coupled to the inverting output terminal and a cathode coupled to the clock terminal, wherein the first light driving circuit comprises a first switch that is controlled by the first control signal to cause a first light to turn on and off; and the second light driving circuit comprises a second switch that is controlled by the second control signal to cause a second light to turn off, such that the generated signal of the LED pulse generator controls more than one light.