ALEXANDRIA, Va., June 5 -- United States Patent no. 12,279,471, issued on April 15, was assigned to Sharp K.K. (Sakai, Japan).
"Display device" was invented by Hisayuki Utsumi (Sakai, Japan), Masayuki Kanehiro (Sakai, Japan) and Youhei Nakanishi (Sakai, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a support substrate, a thin-film transistor layer, a light emitter layer having a plurality of light emitters that emit mutually different colors of light, and a sealing layer sealing the light emitter layer. Each light emitter includes a first electrode, a hole transportation layer, an emissive layer, an electron transportation layer, and a second electrode. The electron transportation layer c...