US Patent Issued to IDEMITSU KOSAN on Nov. 25 for "Organic electroluminescent element, electronic device, and compound" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,844, issued on Nov. 25, was assigned to IDEMITSU KOSAN Co. LTD. (Tokyo).

"Organic electroluminescent element, electronic device, and compound" was invented by Hiroaki Itoi (Tokyo), Yu Kudo (Tokyo), Shintaro Ban (Tokyo), Taro Yamaki (Tokyo) and Takamoto Morita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An organic electroluminescence device includes an emitting region provided between an anode and a cathode, in which the emitting region includes a first emitting layer and a second emitting layer, a ratio DEM1/DEM2 of a film thickness DEM1 of the first emitting layer to a film thickness DEM2 of the second emitting layer is in a range from 2/...