ALEXANDRIA, Va., May 19 -- United States Patent no. 12,635,407, issued on May 19, was assigned to TCL TECHNOLOGY GROUP Corp. (Huizhou, China).

"Preparation method of charge transport layer and light-emitting diode" was invented by Kaimin Chen (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a preparation method of a charge transport layer, which includes steps of: forming a first film layer by a first solution containing a functional material, forming a second film layer by a second solution containing a charge transport material, the first film layer and the second film layer are in contact with each other, or forming a mixed film layer by a mixed solution of...