US Patent Issued to Guangzhou Rising Dragon Recreation Industrial on Sept. 23 for "PWM signal and power transmission method for wireless bathtub lamp" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,426,140, issued on Sept. 23, was assigned to Guangzhou Rising Dragon Recreation Industrial Co. Ltd. (Guangzhou, China).

"PWM signal and power transmission method for wireless bathtub lamp" was invented by Ziqin Guo (Guangzhou, China) and Bo Liang (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a PWM signal and power transmission method for a wireless bathtub lamp. Valid level signals of PWM signals generated by a signal source to control an R-LED module/G-LED module/B-LED module and a corresponding high-frequency signal generated by a fixed-frequency generation device are modulated respectively by means of the modulating am...