ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,407,281, issued on Sept. 2, was assigned to Zhuhai Xprinter Electronics Technology Co. Ltd. (Zhuhai, China).
"Control method for stepping motor of thermal printer" was invented by Dan Liu (Zhuhai, China) and Chenchen Li (Zhuhai, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A control method for a stepping motor of a thermal printer of the present application includes the following steps: in a starting stage of the thermal printer, transmitting a square wave control signal to the stepping motor; in a starting process, using the square wave control signal and switching to square wave control with Pulse Width Modulation (PWM) for outputting in a cas...