| 摘要 |
PROBLEM TO BE SOLVED: To provide a large-sized optical sheet in which joined parts are inconspicuous even when the ends of the optical sheets to be joined have dispersion in thickness. SOLUTION: The large-sized optical sheets are joined with each other by an adhesive 3 such that the respective end surfaces 2, 12 of plural optical sheets having the same optical patterns 1a, 11a are abutted with each other. The adhesive 3 covers the corners 2a, 12a of the end surfaces 2, 12 of the optical sheets 1, 12. |
