US 12,408,243 B2
LED lighting systems with TRIAC dimmers and methods thereof
Liqiang Zhu, Shanghai (CN); and Jun Zhou, Shanghai (CN)
Assigned to On-Bright Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD., Shanghai (CN)
Filed on Feb. 1, 2024, as Appl. No. 18/429,816.
Application 17/023,632 is a division of application No. 16/226,424, filed on Dec. 19, 2018, granted, now 10,827,588, issued on Nov. 3, 2020.
Application 18/429,816 is a continuation of application No. 18/103,971, filed on Jan. 31, 2023, granted, now 11,937,350.
Application 18/103,971 is a continuation of application No. 17/023,632, filed on Sep. 17, 2020, granted, now 11,638,335, issued on Apr. 25, 2023.
Claims priority of application No. 201711464007.9 (CN), filed on Dec. 28, 2017.
Prior Publication US 2024/0334563 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H05B 45/10 (2020.01); H05B 45/31 (2020.01); H05B 45/345 (2020.01); H05B 45/395 (2020.01); H05B 45/50 (2022.01); H05B 45/59 (2022.01)
CPC H05B 45/10 (2020.01) [H05B 45/31 (2020.01); H05B 45/345 (2020.01); H05B 45/395 (2020.01); H05B 45/50 (2020.01); H05B 45/59 (2022.01)] 10 Claims
OG exemplary drawing
 
1. A system for controlling one or more light emitting diodes, the system comprising:
a current regulation circuit coupled directly to a rectifier to receive a rectified voltage and coupled to an anode of one or more light emitting diodes, the one or more light emitting diodes including the anode and a cathode; and
a control circuit configured to receive the rectified voltage;
wherein the control circuit is configured to:
compare an input voltage and a threshold voltage, the input voltage indicating a magnitude of the rectified voltage; and
generate a control signal based at least in part on the input voltage and the threshold voltage;
wherein the control circuit is further configured to:
if the input voltage is larger than the threshold voltage, generate the control signal at a first logic level; and
if the input voltage is smaller than the threshold voltage, generate the control signal at a second logic level;
wherein the current regulation circuit is configured to:
receive the control signal from the control circuit;
allow a current to flow through the one or more light emitting diodes if the control signal is at the first logic level, the current being larger than zero in magnitude; and
not allow the current to flow through the one or more light emitting diodes if the control signal is at the second logic level.