US Patent Issued to KEIWA on Sept. 22 for "Light diffusion sheet, backlight unit, liquid crystal display apparatus, information device, and method of manufacturing light diffusion sheet" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,985, issued on Sept. 22, was assigned to KEIWA Inc. (Tokyo).

"Light diffusion sheet, backlight unit, liquid crystal display apparatus, information device, and method of manufacturing light diffusion sheet" was invented by Akira Furuta (Tokyo), Masayuki Sukigara (Tokyo), Motohiko Okabe (Tokyo), Yoshihiro Fukui (Tokyo) and Tomoko Kimura (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-diffusing sheet includes a plurality of depressed portions formed in an approximately inverted polygonal pyramid on at least a first surface. Ridgelines that partition the plurality of depressed portions have a depressed shape between intersections of the r...