ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,659, issued on Dec. 23, was assigned to MINEBEA MITSUMI Inc. (Nagano, Japan).
"Planar illumination device with local dimming" was invented by Suguru Mukumoto (Kitasaku-gun, Japan) and Shogo Suzuki (Kitasaku-gun, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A planar illumination device according to an embodiment includes a plurality of light sources, a condenser lens, and a field lens. The plurality of light sources are disposed two-dimensionally on a substrate and light emission of the plurality of light sources is individually controlled. The condenser lens is disposed at an exit side of the light sources in parallel with the substrate and ...