ALEXANDRIA, Va., April 15 -- United States Patent no. 12,604,603, issued on April 14, was assigned to Sharp K.K. (Sakai City, Japan).
"Light-emitting element and display device" was invented by Ryo Kitamura (Sakai City, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting element according to an aspect of the disclosure, comprising: a first electrode; a second electrode; a light-emitting layer disposed between the first electrode and the second electrode; and a charge transport layer disposed between the first electrode and the light-emitting layer. The charge transport layer includes a first layer and a second layer closer to the first electrode relative to the first laver. The first layer ...