Projection screen

A projection screen comprising light diffusion control plate,

• the light diffusion control plate including a light diffusion control film having an internal structure including a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index in the interior of the film,
• wherein 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 on the intersection point of the orthogonally intersecting first direction and second direction at an incident angle of 0° is designated as L0 (cd/m2);
• the luminance of diffused light obtainable when light is incident on the intersection point of the orthogonally intersecting first direction and second direction at an incident angle varying in the range of −30° to 30° along the first direction is designated as L1 (cd/m2);
• and
• the luminance of diffused light obtainable when light is incident on the intersection point of the orthogonally intersecting first direction and second direction at an incident angle varying in the range of 0° to 30° along the second direction is designated as L2 (cd/m2),
• there exist the first direction and the second direction, in which L0, L1, and L2 always satisfy the following relational expressions (1) and (2),
• wherein in a case in which the luminance of diffused light obtainable when light is incident on the intersection point of the orthogonally intersecting first direction and second direction at an incident angle of −30° along the second direction is designated as) L3(−30°) (cd/m2), L3(−30°) satisfies the following relational expression (3):
• L1≥0.25×L0 (1)
• L2≥0.25×L0 (2)
• L3(−30°)<0.7×L0 (3).