CPC H05B 45/32 (2020.01) [H05B 45/10 (2020.01); H05B 47/16 (2020.01); H05B 47/165 (2020.01)] | 10 Claims |
1. A light-emitting diode (LED) light string control system using carrier signal control, comprising:
a control module configured to convert a DC voltage into a lighting drive signal according to a lighting command, and
an LED light string comprising at least one LED module, and coupled to the control module, and the at least one LED module comprising:
a detection circuit configured to generate a detected signal corresponding to the lighting drive signal,
a logic circuit configured to determine a first level being a first logic signal, a second logic signal, or a latch signal according to a time duration of the detected signal at the first level, and
an oscillator configured to provide a clock signal to the logic circuit for calculating the time duration according to the first level and go into a sleep mode according to a sleep signal,
wherein the logic circuit provides the sleep signal according to the detected signal at a second level, or the detected signal at the second level is used as the sleep signal for the oscillator.
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