ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,721,015, issued on Aug. 25, was assigned to Chengdu BOE Optoelectronics Technology Co. Ltd. (Sichuan, China) and BOE Technology Group Co. Ltd. (Beijing).

"Light-emitting substrate and manufacturing method therefor, display apparatus" was invented by Tongzhi Liu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting substrate includes a base substrate, a light-emitting unit and a light extraction member arranged in sequence. The light-emitting unit includes at least one blue light-emitting device, a first light enhancement layer and a second light enhancement layer arranged in sequence. A blue light-emitting device includes a first elec...