Towards a polarized light-emitting backlight: micro-structured anisotropic layers

摘要

A backlight for liquid-crystal-display illumination is presented, in which s-polarized light is preferentially coupled out by micro-optical structures in a birefringent layer. In the experiments, contrasts higher than 5 have been obtained. A polarization dependent ray-tracing model has been developed. Important guidelines for finding an optimal backlight configuration have been derived from the calculations.