ALEXANDRIA, Va., March 31 -- United States Patent no. 12,593,562, issued on March 31, was assigned to Yungu (Gu'an) Technology. Ltd. (Langfang, China).

"Organic light-emitting device and display panel" was invented by Chunliang Yao (Langfang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an organic light-emitting device and a display panel. The organic light-emitting device includes a plurality of layers stacked with each other between an anode and a cathode. The plurality of layers includes a first hole transport layer, a first light-emitting layer, a first electron transport layer, an n-type charge generation layer, and a p-type charge generation layer stacked in sequ...