ALEXANDRIA, Va., July 16 -- United States Patent no. 12,672,427, issued on June 30, was assigned to BOE Technology Group Co. Ltd. (Beijing).
"Display panel, preparation method thereof and display apparatus" was invented by Pengfei Zuo (Beijing), Guanyin Wen (Beijing), Yanjun Hao (Beijing), Hui Zhou (Beijing), Qixiao Wu (Beijing) and Huameng Liu (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "A display panel, including a substrate, and a first electrode, at least two emission functional layers and a second electrode sequentially stacked on a side of the substrate, where for any two adjacent emission functional layers, one close to the substrate includes a first hole transport layer, a first emission l...