ALEXANDRIA, Va., March 26 -- United States Patent no. 12,262,575, issued on March 25, was assigned to BOE TECHNOLOGY GROUP Co. LTD. (Beijing).
"Display substrate and display device" was invented by Haiyan Sun (Beijing), Xiaojin Zhang (Beijing), Dan Wang (Beijing) and Changho Lee (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a display substrate including a base substrate, an anode layer, a light-emitting layer, an electron diffusion layer, a hole block layer and a cathode layer which are sequentially stacked along a direction away from the base substrate, wherein a material of the electron diffusion layer comprises a first luminescent material, and a transport speed of holes generated by...