US Patent Issued to SHENZHEN BILLDA TECHNOLOGY on Dec. 16 for "Emergency power supply circuit and lighting device" (Chinese Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,442, issued on Dec. 16, was assigned to SHENZHEN BILLDA TECHNOLOGY Co. LTD (Shenzhen, China).

"Emergency power supply circuit and lighting device" was invented by Jianjun Ke (Guangdong, China), Weichang Wu (Guangdong, China), Peizhi Chen (Guangdong, China) and Qiu Feng (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The application provides an emergency power supply circuit and a lighting device. A main control unit monitors an output voltage of a charging circuit; when the charging circuit is abnormal, an auxiliary power supply is connected to an energy storage unit by means of an auxiliary power supply control circuit to charge th...