Optical element
AssigneeLG Chem, Ltd.
InventorsEun Mi SEO, Sin Young Kim, Kyun Il Rah, Moon Soo Park, Seung Hun Chae
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Abstract
An optical element and a stereoscopic image display device are provided. The optical element is a light-dividing element, for example, an element that can divide incident light into at least two kinds of light having different polarized states. Therefore, the optical element can be used to realize a stereoscopic image.
Claims20
An optical element comprising a polarizer and a liquid crystal layer which are attached to each other by means of an adhesive layer including an active energy ray-curable adhesive composition in a cured state, the adhesive composition including a radically polymerizable compound containing a hydroxyl group and a cationically polymerizable compound,
- the liquid crystal layer having a difference between in-plane refractive index in a slow axis direction and in-plane refractive index in a fast axis direction of 0.05 to 0.2 and a thickness of 0.5 μm to 2.0 μm, and satisfies the following Equation 1:
- X<8% 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.
Dependencies are inferred from the claim text.