ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,120, issued on Sept. 9, was assigned to Samsung Display Co. Ltd. (Yongin-si, South Korea).
"Organic light emitting device" was invented by Yoshimasa Fujita (Yokohama, Japan), Shuri Sato (Yokohama, Japan) and Hiroaki Itoi (Yokohama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An organic light emitting device including an anode; a hole transport region on the anode; an emission layer on the hole transport region; an electron transport region on the emission layer; and a cathode on the electron transport region, wherein the hole transport region includes: a first hole transport layer including a first hole transport material represented by th...