ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,464, issued on Dec. 30, was assigned to LG CHEM Ltd. (Seoul, South Korea).
"Organic light emitting device" was invented by Sang Duk Suh (Daejeon, South Korea), Min Woo Jung (Daejeon, South Korea), Jungha Lee (Daejeon, South Korea), Su Jin Han (Daejeon, South Korea), Seulchan Park (Daejeon, South Korea), Sunghyun Hwang (Daejeon, South Korea) and Dong Hoon Lee (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an organic light emitting device having improved driving voltage, efficiency and lifetime, the device including a light emitting layer comprising a first compound of Chemical Formula 1 and a second compound of Chemi...