ALEXANDRIA, Va., May 26 -- United States Patent no. 12,641,996, issued on May 26, was assigned to Beijing BOE Technology Development Co. Ltd. (Beijing) and BOE Technology Group Co. Ltd. (Beijing).

"Quantum dot film layers, quantum dot light emitting devices and manufacturing methods therefor" was invented by Jingwen Feng (Beijing) and Zhuo Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a quantum dot film layer, a quantum dot light emitting device and a manufacturing method therefor to improve the balance of carriers. The quantum dot film layer includes a first quantum dot layer and a second quantum dot layer. The first quantum dot layer includes first quantum dots...