ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,673, issued on March 18, was assigned to BOE TECHNOLOGY GROUP Co. LTD. (Beijing).

"Optical waveguide element and control method thereof, display device and display method thereof" was invented by Sen Ma (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical waveguide element, a control method of the optical waveguide element, a display device and a display method of the display device are provided. The optical waveguide element includes an optical waveguide layer and a first grating, the first grating overlaps with the optical waveguide layer and includes at least one first sub-grating unit, the at least one first sub-grating unit is co...