Light emitting diode driving system and light emitting diode lamp

摘要

A light emitting diode driving system includes a plurality of light emitting diode driving apparatuses and a transmission line. The transmission line is electrically connected to the light emitting diode driving apparatuses. The light emitting diode driving apparatus includes a voltage regulator, a synchronous signal generation circuit and a synchronous control logic circuit. The voltage regulator sends a first voltage to the synchronous signal generation circuit. The synchronous signal generation circuit generates a second voltage after the synchronous signal generation circuit receives the first voltage. The synchronous signal generation circuit subtracts the second voltage from the first voltage to obtain a synchronous signal. The synchronous signal generation circuit sends the synchronous signal to the synchronous control logic circuit. The light emitting diode driving apparatuses drive the light emitting diodes synchronously according to the synchronous signals.

主权项

1. A light emitting diode driving system applied to an alternating current power supply apparatus, a rectifying filtering circuit and a plurality of light emitting diodes, the alternating current power supply apparatus electrically connected to the rectifying filtering circuit, the light emitting diode driving system electrically connected to the rectifying filtering circuit and the light emitting diodes, the light emitting diode driving system comprising:
a plurality of light emitting diode driving apparatuses electrically connected to the rectifying filtering circuit and the light emitting diodes, the light emitting diode driving apparatuses connected to each other in series; and a transmission line electrically connected to the rectifying filtering circuit and the light emitting diode driving apparatuses,
wherein the light emitting diode driving apparatus comprises: a power positive contact electrically connected to the rectifying filtering circuit and the transmission line; a voltage regulator electrically connected to the power positive contact; a power negative contact electrically connected to the voltage regulator; a synchronous signal generation circuit electrically connected to the voltage regulator; and a synchronous control logic circuit electrically connected to the voltage regulator and the synchronous signal generation circuit, wherein the alternating current power supply apparatus sends an alternating current power to the rectifying filtering circuit; the rectifying filtering circuit rectifies and filters the alternating current power to obtain a direct current power; the rectifying filtering circuit sends the direct current power to the voltage regulator; wherein the voltage regulator generates a first voltage after the voltage regulator receives the direct current power; the voltage regulator sends the direct current power to a next light emitting diode driving apparatus after the voltage regulator generates the first voltage; the voltage regulator sends the first voltage to the synchronous signal generation circuit after the voltage regulator generates the first voltage; wherein the synchronous signal generation circuit generates a second voltage after the synchronous signal generation circuit receives the first voltage; the synchronous signal generation circuit subtracts the second voltage from the first voltage to obtain a synchronous signal; the synchronous signal generation circuit sends the synchronous signal to the synchronous control logic circuit; the light emitting diode driving apparatuses drive the light emitting diodes synchronously according to the synchronous signals.