ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,108, issued on Sept. 23, was assigned to LONG YAN DE YU LIGHTING Co. LTD. (Fujian, China).
"LED filament and lamp" was invented by Yuanming Li (Fujian, China), Dehua Huang (Fujian, China), Xiaoqin Jian (Fujian, China) and Zhansheng Jian (Fujian, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An LED filament and a lamp are disclosed. The LED filament includes a substrate, a conductive circuit, a control chip, light-emitting chips, and electrical connection terminals. The conductive circuit includes an independent signal control circuit. The control chip is a bare-die chip, and has a VDD interface, a GND interface, an IN interface, an OUT inter...