ALEXANDRIA, Va., June 16 -- United States Patent no. 12,658,688, issued on June 16, was assigned to Aputure Imaging Industries Co. Ltd. (Shenzhen, China).
"Power supply circuit, working method of power supply circuit, and lighting device" was invented by Yi Huang (Shenzhen, China), Xiangjun Zhou (Shenzhen, China), Yi Xie (Shenzhen, China) and Kun Tong (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power source circuit includes a first power source subcircuit. The first power source subcircuit includes a first overvoltage protection circuit, a first undervoltage protection circuit, a first drive circuit, and a first switching circuit. A cascade output result of the first over-voltage protec...