ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,464,617, issued on Nov. 4, was assigned to Zhuhai Shengchang Electronics Co. Ltd. (Zhuhai, China).
"Method of selecting PWM dimming frequency for dimmable LED power supply" was invented by Guobiao Wen (Meizhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a method of selecting a PWM dimming frequency for a dimmable LED power supply. After a main power drive is powered on, a main control module checks a shift element signal status of a four-shift switching module. Based on the main control module, a dimming PWM pulse frequency currently outputted by the power supply is determined according to the shift element signa...