US Patent Issued to KEIWA on May 27 for "Light diffusion sheet, back-light unit, liquid crystal display device, information apparatus, and method for manufacturing back-light unit" (Japanese Inventor)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,935, issued on May 27, was assigned to KEIWA Inc. (Tokyo).

"Light diffusion sheet, back-light unit, liquid crystal display device, information apparatus, and method for manufacturing back-light unit" was invented by Chengheng Tsai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light diffusion sheet 43 is incorporated in a backlight unit 40 using a plurality of light sources 42 arranged in a two-dimensional matrix. The light diffusion sheet 43 has surfaces, on at least one of which a plurality of recesses 22 having a substantially inverted quadrangular pyramid shape are arranged in a two-dimensional matrix. An intersecting angle between an a...