Light absorption anisotropic film, viewing angle control system, and image display device

Abstract

A light absorption anisotropic film that displays a bright, clear image in a desired direction and makes the image invisible from other than the desired direction using an image display device, a viewing angle control system formed of the light absorption anisotropic film, and an image display device formed of the light absorption anisotropic film. The light absorption anisotropic film includes a light absorption anisotropic layer that contains a liquid crystal compound and an organic dichroic substance, where an angle between an alignment direction of a light absorption axis of the organic dichroic substance on one surface and on the other surface of the light absorption anisotropic layer and a normal line of the light absorption anisotropic layer is defined as θA and θB, a difference between the angle θA and the angle θB is 15° or less, and the angle θA is 5° or greater and less than 45°.

Dependencies are inferred from the claim text.