US 11,683,869 B2
Light-emitting diode light string control system using carrier signal control and signal control method thereof
Wen-Chi Peng, New Taipei (TW)
Assigned to SEMISILICON TECHNOLOGY CORP., New Taipei (TW)
Filed by Semisilicon Technology Corp., New Taipei (TW)
Filed on Apr. 2, 2021, as Appl. No. 17/221,095.
Application 17/221,095 is a continuation in part of application No. 16/444,284, filed on Jun. 18, 2019, granted, now 11,085,620.
Claims priority of application No. 201910384047.5 (CN), filed on May 9, 2019; and application No. 110106272 (TW), filed on Feb. 23, 2021.
Prior Publication US 2021/0227658 A1, Jul. 22, 2021
Int. Cl. H05B 45/32 (2020.01); H05B 47/16 (2020.01); H05B 47/165 (2020.01); H05B 45/10 (2020.01)
CPC H05B 45/32 (2020.01) [H05B 45/10 (2020.01); H05B 47/16 (2020.01); H05B 47/165 (2020.01)] 10 Claims
OG exemplary drawing
 
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.