ALEXANDRIA, Va., June 4 -- United States Patent no. 12,321,005, issued on June 3, was assigned to GOOGLE LLC (Mountain View, Calif.).

"Lightguide outcoupler and methods for outcoupling light of a lightguide" was invented by Joseph Daniel Lowney (Tucson, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides techniques to reduce the appearance of an illuminated area on the world-side of lens of a head mounted display (HMD) caused by display light that is outcoupled away from a user. A perimeter region is added to surround a primary region of an outcoupler, where the primary region includes a primary grating structure with one or more grating features to direct display light to th...