Patent ID: 8817222
Filing Date: 2014-08-26
Classification: C09K,G02B,G02F

Abstract:
1. An optical element comprising a polarizer and a liquid crystal layer which are attached to each other by an adhesive layer comprising a cured active energy ray-curable adhesive composition including an acrylamide-based radically polymerizable compound, the liquid crystal layer having a difference between in-plane refractive indexes in a slow axis direction and a fast axis direction of 0.05 to 0.2 and a thickness of 0.5 μm to 2.0 μm, and satisfying the following Equation 1: wherein X represents a percentage of a variation in a phase difference value of the liquid crystal layer obtained after keeping the optical element at 80° C. for 100 hours, relative to the initial phase difference value of the liquid crystal layer of the optical element.