ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,893, issued on April 7, was assigned to MINEBEA MITUSMI Inc. (Nagano, Japan).
"Planar illumination device" was invented by Ginga Ito (Kitasaku-gun, Japan) and Masaya Fujiwara (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 substrate, a first optical element, a second optical element, a third optical element, a pair of fourth and fifth optical elements, and a sixth optical element. A plurality of light sources are two-dimensionally arranged on the substrate. The first optical element is arranged at an emission side of the plurality of light sources to condense ligh...