BACKLIGHT ASSEMBLY

摘要

A reflective polarizer of the present invention comprises a plurality of groups which are formed to be integrated and have different average optical thicknesses, and therefore, a separate adhesive layer and/or a protective layer are/is not included in a core layer and between the core layer and a skin layer, thereby advantageously maximizing optical material properties in a limited thickness as well as remarkably reducing manufacturing costs. Furthermore, due to the groups formed to have different average optical thicknesses, all S waves of a visible ray wavelength region can be reflected. Moreover, polymer of a base has a plate shape, and therefore, the present invention may achieve excellent optical material properties even in case of including the very small number of double refraction polymers compared to a reflective polarizer including the existing double refraction polymer based on the same area. In addition, the reflective polarizer of the present invention may have very high polarization degree.