Projection screen

Abstract

Provided is a projection screen that can effectively diffuse incident light coming from a wide range of angles in the transverse direction and the longitudinal direction and can provide a wide viewing angle even if the projection screen is applied to a large-sized screen. Disclosed is a projection screen including a light diffusion control plate, in which when a first direction and a second direction orthogonally intersecting each other are assumed to be on the surface of the light diffusion control plate, and when the incident angle of the light incident to the light diffusion control plate is defined such that an angle parallel to the normal line to the surface of the light diffusion control plate is defined as 0°, in a case in which the luminance of diffused light obtainable when light is incident at an incident angle of 0° is designated as L; the luminance of diffused light obtainable when light is incident at a predetermined incident angle along the first direction is designated as L; and the luminance of diffused light obtainable when light is incident at a predetermined incident angle along the second direction is designated as L, there exist a first direction and a second direction, in which L, L, and Lalways satisfy the following relational expressions (1) and (2):≥0.25×  (1)≥0.25×  (2).