ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,736,739, issued on Sept. 15, was assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. (Dongguan, China).

"Waveguide assembly, optical device and intelligent glasses" was invented by Guang Zheng (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A waveguide assembly, an optical device and smart glasses are provided. The waveguide assembly includes a first waveguide layer, a second waveguide layer, and a first spacing layer. The first spacing layer includes a first region and a second region. A refractive index of the first region is less than that of the first waveguide layer and that of the second waveguide layer. A refractive i...