Patent ID: 8794799

Claim:
An optical sheet comprising: a sheet-like main body; at least three or more first unit shaped elements arranged on one surface of the main body; and second unit shaped elements arranged on the one surface of the main body, each extending in parallel with one direction on a sheet surface of the main body; wherein: a height of each of the first unit shaped elements from the one surface is higher than a height of each of the second unit shaped elements; a height of a projection of each first unit shaped element from the one surface of the main body is higher than a height of a projection of each second unit shaped element from the one surface of the main body, and a width of each first unit shaped element along an arrangement direction of the second unit shaped elements is wider than a width of each second unit shaped element along the arrangement directon of the second unit shaped elements so that at least part of the second unit shaped elements are divided into sections by the first unit shaped elements; and a rate of an area occupied by the first unit shaped elements on the one surface is not more than 10.0%, when observed along a normal direction relative to the one surface.