US Patent Issued to XIAMEN XM-PLUS TECHNOLOGY on July 21 for "LED display and pulse width modulation system therefor" (Chinese Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,690,105, issued on July 21, was assigned to XIAMEN XM-PLUS TECHNOLOGY Co. LTD (Xiamen, China).

"LED display and pulse width modulation system therefor" was invented by Wei-Chun Su (Hsinchu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pulse width modulation system. Considering that a phase-locked loop can reduce a pulse width of a clock signal by increasing the frequency, in the present application, by means of a control voltage outputted by a filter in the phase-locked loop, an external second voltage-controlled retarder which has the same structure as a voltage-controlled retarder in the phase-locked loop can shift a phase of an original PWM...