ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,745,509, issued on Sept. 22, was assigned to BEIJING BOE TECHNOLOGY DEVELOPMENT Co. LTD. (Beijing) and BOE TECHNOLOGY GROUP Co. LTD (Beijing).

"Light-emitting device and method for manufacturing the same, display substrate" was invented by Dong Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting device and a method for manufacturing the same, and a display substrate are provided. The light-emitting device includes a first electrode, an electron transport layer, a light-emitting layer, a hole transport layer and a second electrode that are arranged sequentially. The electron transport layer includes at least one electron transpor...