ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,538,641, issued on Jan. 27, was assigned to Sharp K.K. (Sakai, Japan).
"Display device manufacturing method and display device" was invented by Hiroki Imabayashi (Sakai, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A display device manufacturing method of manufacturing a display device including a plurality of light-emitting elements in each of which an anode, a hole injection layer, a light-emitting layer, and a cathode are layered in this order, the hole injection layer being provided in common in the plurality of light-emitting elements, and the method including treating the hole injection layer with a treatment liquid to change conductivity ...