ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,796, issued on May 19, was assigned to Dai Nippon Printing Co. Ltd. (Nagoya, Japan).
"Optical sheet and method of manufacturing the same" was invented by Tsuyoshi Kashiwagi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical sheet 1 includes an optical function film 10 and protection films 20. The optical function film 10 includes an optical function layer 11. The optical function layer 11 includes optical-element portions that are of two or more different kinds and are arrayed in one direction. The protection films 20 each include a protection layer 21 and an adhesive layer 22. The protection films 20 are peelably provided on a pair of ...