The present disclosure provides a circular polarizer for use on a display including a transparent substrate disposed on the display and a plurality of strip dielectric wire grids disposed on the transparent substrate; each dielectric wire grid is provided with a wire grid array formed by a plurality of wire grids, and each of the dielectric wire grids respectively corresponds to a region above one of R sub-pixel unit, G sub-pixel unit and B sub-pixel unit of the display and has a corresponding thickness, so that each of the dielectric wire grids forms a quarter-phase delay on the sub-pixel units of the corresponding display. The implementation of the disclosure can solve the problem that the traditional organic phase retarder can not achieve the wide circular partial effect, and improve the visual effect.