US Patent Issued to Semiconductor Energy Laboratory on June 3 for "Light-emitting device, light-emitting apparatus, electronic device, and lighting device" (Japanese Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,688, issued on June 3, was assigned to Semiconductor Energy Laboratory Co. Ltd. (Atsugi, Japan).

"Light-emitting device, light-emitting apparatus, electronic device, and lighting device" was invented by 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 fluorescent substance and a phosphorescent substance or a thermally activated delayed fluorescent material; the fluorescent substance includes a luminophore and five or more protecting groups; the luminophore is a condensed aromatic ring...