ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,859, issued on May 27, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).
"Grin lens structure in micro-LED devices" was invented by James Ronald Bonar (Redmond, Wash.), James Small (Glasgow, Great Britain) and Gareth John Valentine (Redmond, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A GaN layer of micro-LEDs is exposed to ion implantation to amorphize one or more regions of the GaN layer. As a result, the GaN layer through which light rays propagate have non-uniform refractive indexes that modify propagation paths of some light rays. Ions are implanted in a region overlapping an active region that emits light to functi...