SCREEN AND IMAGE DISPLAY APPARATUS HAVING THE SCREEN

摘要

A screen and an image display apparatus having the same are provided to increase transmittance of beams and to prevent ghost images from being generated. A screen comprises a Fresnel lens(100), a focusing lens(140), and an external beam blocking unit. In the Fresnel lens, a plurality of triangle prisms are aligned on an incident surface. The focusing lens is configured to focus beams passing through the Fresnel lens. The external beam blocking unit is installed between the Fresnel lens and the focusing lens to block external beams. In the Fresnel lens, the angle of the prism is less than 48‹.