US Patent No. 10,694,595

LIGHT EMITTING DIODE DRIVING CIRCUIT WITH LOW HARMONIC DISTORTION


Patent No. 10,694,595
Issue Date June 23, 2020
Title Light Emitting Diode Driving Circuit With Low Harmonic Distortion
Inventorship Yu-Chen Lin, Dongguan (CN)
Hung-Chan Wang, Dongguan (CN)
Jin-Ping Liu, Dongguan (CN)
Assignee EDISON OPTO (DONGGUAN) CO., LTD., Dongguan, Guang Dong (CN)

Claim of US Patent No. 10,694,595

1. A light emitting diode (LED) driving circuit with low harmonic distortion, comprising:a rectifying circuit, for rectifying an alternating current (AC) power source to provide a direct current (DC) voltage output;
a linear constant current circuit, for driving at least an LED;
a current limiting circuit, connected in parallel between the rectifying circuit and the linear constant current circuit, for generating a current limiting effect and determining a current limiting height; and
a current limiting ramp slope determining circuit, connected in parallel between the rectifying circuit and the linear constant current circuit and connected in series with the current limiting circuit, for determining a current limiting ramp slope.