FRESNEL LENS STRUCTURE AND 2D/3D SWITCHABLE IMAGE DISPLAY APPARATUS USING SAME

摘要

The present invention relates to a Fresnel lens structure comprising a Fresnel lens layer; and a planarizing layer located on the Fresnel lens layer. One of the Fresnel lens layer and the planarizing layer is composed of a birefringent material and the other is composed of an isotropic material having the same refractive index as the maximum refractive index or the minimum refractive index of the birefingent material. According to the present invention, because a 2D/3D switchable structure is simple, the switching is easy,and for 2D/3D switching a complicated device is not used, a Fresnel lens structure allows the 3D image display apparatus to be simple and has an effect on reducing production costs compared with a lenticular lens, by using a lens structure of a Fresnel shape.