ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,790, issued on July 29, was assigned to SEIKO EPSON Corp. (Tokyo).
"Virtual image display device and optical unit" was invented by Atsushi Saito (Chino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A virtual image display device includes an imaging light generation device generating an imaging light, a transmission inclined mirror configured to reflect the imaging light, and a concave transmission mirror including: a partial reflection film reflecting the imaging light reflected transmission inclined mirror, and a reflection type diffraction layer being disposed on opposite to the reflection film. In the reflection type diffraction layer dif...