Optical sheet with adhesive layer and method for producing optical sheet with adhesive layer

摘要

PROBLEM TO BE SOLVED: To provide an optical sheet with an adhesive layer, which has excellent adhesion, excellent aggregability and excellent long-term durability, and wherein an adhesive layer part does not fill recesses and projections over time, the recesses and projections having been formed by processing.SOLUTION: The optical sheet with an adhesive layer is produced by arranging an adhesive layer 20 on the recessed and projected surface of an optical film 10 which has been subjected to processing for forming recesses and projections. In addition, the optical sheet with an adhesive layer is bonded to various light sources 40 or image display elements 50, thereby obtaining light sources or image display devices that have improved light extraction efficiency without changing the designs of the light sources or image display elements, while securing uniform light emission and improving viewing angles especially in devices that include the image display elements.