OPTICAL SHEET AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for producing an optical sheet, allowing improvement of quality of a product using the optical sheet by preventing streaks from being formed on a print surface when printing a dot pattern on the back surface of the optical sheet using a plurality of inkjet nozzles.

SOLUTION: Adjacent inkjet heads 51, 52 are provided with a plurality of inkjet nozzles 51A-51C, 52A-52C, respectively. A fixed distance d1 between the nozzles and an unfixed distance d2 between the nozzles in printing the dot pattern satisfies the following expression (1): 0.94COPYRIGHT: (C)2012,JPO&INPIT