ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,858, issued on April 21, was assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. (Dongguan, China).

"Near-to-eye display optical system and optical filter" was invented by Zhenyu Gao (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A near-to-eye display optical system includes a display assembly, an optical filter, a first optical assembly, and a second optical assembly. The display assembly is configured to emit light rays having image information. The optical filter is configured to transmit the light rays whose emergent angles meet a preset transmission condition and shield the light rays whose emergent angles do not m...