US Patent Issued to KEIWA on Jan. 27 for "Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit" (Japanese Inventor)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,706, issued on Jan. 27, was assigned to KEIWA Inc. (Tokyo).

"Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit" was invented by Chengheng Tsai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical sheet laminate 100 to be incorporated into a backlight unit 40 includes a plurality of diffusion sheets 43 having a first surface 21a having a plurality of recesses 22 having a substantially inverted polygonal pyramid shape, and a pair of prism sheets 44 and 45 having prism extending directions perpendicular to each other. An arrangement direction of the recesse...