ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,235, issued on Oct. 21, was assigned to TCL TECHNOLOGY GROUP Corp. (Huizhou, China).

"Light-emitting diode comprising composite film between electron transport layer and cathode and preparation method thereof" was invented by Tianshuo Zhang (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting diode and a preparation method of the light-emitting diode are provided in the present application. The light-emitting diode includes an anode and a cathode which are arranged opposite to each other, a luminescent layer arranged between the anode and the cathode, an electron transport layer arranged between the cathode and the lumin...