ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,550,522, issued on Feb. 10, was assigned to Sharp K.K. (Sakai, Japan).
"Display device and display device production method" was invented by Hisayuki Utsumi (Sakai, Japan) and Masayuki Kanehiro (Sakai, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A display device has a thin film transistor layer, a light-emitting element layer, and an electron transport layer provided on a light-emitting layer. The light-emitting element layer includes a plurality of light-emitting elements each of which includes a first electrode, a function layer, and a second electrode, and that emit mutually different colors of light. A first hole transport layer contains a ...