ALEXANDRIA, Va., March 24 -- United States Patent no. 12,588,125, issued on March 24, was assigned to OPPLE LIGHTING Co. LTD. (Shanghai) and SUZHOU OPPLE LIGHTING Co. LTD. (Suzhou City, China).

"Hysteresis circuit, emergency lighting circuit and lighting device" was invented by Xinsheng Liu (Shanghai) and Guangchuan Zhu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a hysteresis circuit, an emergency lighting circuit, and a lighting device. The hysteresis circuit includes a voltage detection module, an isolation coupling module, and a voltage adjusting module. By detecting the sampling voltage associated with the input voltage, in the case that the sampling voltage ...