ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,653, issued on Dec. 2, was assigned to LG CHEM Ltd. (Seoul, South Korea).
"Organic light emitting diode" was invented by Yongbum Cha (Daejeon, South Korea), Boonjae Jang (Daejeon, South Korea), Sung Kil Hong (Daejeon, South Korea) and Sang Duk Suh (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An organic light emitting device including: a positive electrode; a negative electrode facing the positive electrode; a light emitting layer between the positive electrode and the negative electrode; a first organic material layer comprising a compound of Formula 1 provided between the negative electrode and the light emitting layer; and a...