ALEXANDRIA, Va., April 7 -- United States Patent no. 12,598,861, issued on April 7, was assigned to Wuhan China Star Optoelectronics Semiconductor Display Technology Co. Ltd. (Wuhan, China).

"Display panels" was invented by Haoran Wang (Wuhan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the present disclosure provide a display panel, in which a hole control layer is disposed on a hole transport layer, a light-emitting material layer is disposed on the hole control layer, and the hole control layer includes a first sub-hole control layer and a second sub-hole control layer. An energy difference between a HOMO energy level of the first sub-hole control layer and a HOMO energy level of t...