ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,783, issued on Oct. 7, was assigned to Hefei BOE Joint Technology Co. Ltd. (Anhui, China) and BOE Technology Group Co. Ltd. (Beijing).

"Display substrate and preparation method therefor, and display apparatus" was invented by Luke Ding (Beijing) and Yongqian Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display substrate and a display device are provided. The display substrate includes a light emitting element disposed on a base substrate, and an encapsulation layer, a connection layer, a light extraction layer, a polarization conversion layer and a polarization layer stacked sequentially at a light exiting side of the light emitting e...