US 11,864,287 B1
0-10 volt dimming for AC-powered LED lights
Wai Ho Choy, Mineola, NY (US); Yumeng Sha, Little Neck, NY (US); Haisheng Zhou, Hengnan County (CN); and Wei Gao, Guangzhou (CN)
Assigned to Wangs Allliance Corporation, Port Washington, NY (US)
Filed by Wangs Alliance Corporation, Port Washington, NY (US)
Filed on May 31, 2023, as Appl. No. 18/203,844.
Claims priority of provisional application 63/400,489, filed on Aug. 24, 2022.
Int. Cl. H05B 45/325 (2020.01); H05B 45/3725 (2020.01); H05B 45/10 (2020.01); H05B 47/175 (2020.01)
CPC H05B 45/325 (2020.01) [H05B 45/10 (2020.01); H05B 45/3725 (2020.01); H05B 47/175 (2020.01)] 24 Claims
OG exemplary drawing
 
1. Apparatus comprising:
a voltage conversion circuit configured to generate a digital output based on a dimming level configured to be set on a 0-10 V dimmer that outputs a DC voltage control signal;
a switch that controls, based on the digital output, AC power supplied to a load circuit that is configured to receive AC power;
a microcontroller (“MCU”) in communication with the voltage conversion circuit;
wherein:
the MCU includes:
a first input terminal configured to receive the digital output as a first input; and
an output terminal configured to output a first pulse-width modulated (“PWM”) signal, based on the digital output, to the switch; and
the first PWM signal has a duty cycle that corresponds to the dimming level; and
a voltage detection circuit that is configured to:
output a second PWM signal based on a voltage of the AC power that is input to the voltage detection circuit; and
transmit the second PWM signal to the MCU;
wherein:
the MCU further includes a second input terminal configured to receive, as a second input, the second PWM signal from the voltage detection circuit; and
the first PWM signal is based on the first input and the second input.