ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,502, issued on May 13, was assigned to SEIKO EPSON Corp. (Tokyo).
"Virtual image display device" was invented by Osamu Yokoyama (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a virtual image display device including an imaging light emitting device, a light-guiding member configured to guide imaging light emitted from the imaging light emitting device, and an emission-side diffraction element provided at a light-emitting portion of the light-guiding member and configured to emit the imaging light by diffraction. In the emission-side diffraction element, a light amount difference between a first component light and a seco...