ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,739, issued on Aug. 12, was assigned to Semiconductor Energy Laboratory Co. Ltd. (Atsugi, Japan).

"Light-emitting device, display device, light-emitting apparatus, electronic device, and lighting device" was invented by Takeyoshi Watabe (Kanagawa, Japan), Airi Ueda (Kanagawa, Japan), Yuta Kawano (Kanagawa, Japan), Nobuharu Ohsawa (Kanagawa, Japan) and Satoshi Seo (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting device with high emission efficiency is provided. The light-emitting device includes a first electrode, a second electrode, and an EL layer positioned between the first electrode and the second electrode. The E...