Light emitting diode driving system with light signals carried via power lines

A light emitting diode driving system with light signals carried via power lines applied to a light emitting diode lamp string, the light emitting diode driving system comprising:

• a switch unit comprising a power input side, a power output side and a controlled side, the power output side electrically connected to the light emitting diode lamp string;
• a control unit electrically connected to the switch unit;
• a light signal generating unit electrically connected to the control unit and the power output side;
• and
• a controlling side zener diode electrically connected to the control unit and supplying power to the control unit,
• wherein the controlling side zener diode, the switch unit and the light emitting diode lamp string are connected in series;
• the light signal generating unit generates the light signal when the control unit turns off the switch unit;
• the light signal generating unit sends the light signal to the light emitting diode lamp string.