ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,787,142, issued on Nov. 3, was assigned to SHANGHAI XINQUAN MICROELECTRONICS TECHNOLOGY Co. LTD. (Shanghai).

"Emergency detection circuit and apparatus compatible with triac dimmer" was invented by Daoxing Gong (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides an emergency detection circuit and apparatus compatible with a triac dimmer. In the emergency detection circuit, a boost module, a grid status detection and control module, a boost freewheeling circuit connected to an AC neutral line, an emergency battery, an emergency light module, a rectifier circuit, and a triac dimmer connected to an AC live line are electr...