US Patent Issued to IDEMITSU KOSAN on Jan. 20 for "Organic electroluminescence device and electronic apparatus" (Japanese Inventors)

ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,532,659, issued on Jan. 20, was assigned to IDEMITSU KOSAN Co. LTD. (Tokyo).

"Organic electroluminescence device and electronic apparatus" was invented by Keitaro Yamada (Sodegaura, Japan) and Masato Nakamura (Sodegaura, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An organic electroluminescence device, comprising: a cathode, an anode, an emitting layer disposed between the cathode and the anode, and a hole-transporting zone disposed between the anode and the emitting layer, wherein the hole-transporting zone contains a first layer and a second layer in this order from the anode side, the first layer contains a compound represented by the follow...