ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,721,000, issued on Aug. 25, was assigned to BEIJING BOE TECHNOLOGY DEVELOPMENT Co. LTD. (Beijing) and BOE TECHNOLOGY GROUP Co. LTD (Beijing).

"Display substrate and preparation method therefor" was invented by Dacheng Zhang (Beijing) and Pan Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display substrate and a manufacturing method thereof are provided. The display substrate includes a base substrate, a first metal layer, a first insulating layer, a first electrode layer, a light-emitting material layer, a carbon-containing structural layer and a second electrode layer. The first metal layer includes an auxiliary electrode pattern; the fir...