Patent ID: 8760764

Claim:
A regular pattern optical sheet, comprising: a transparent flat plate-shaped body; and a plurality of lens-shaped patterns regularly formed at one surface of the body, each having a same size of more than 5 μm but smaller than 25 μm in diameter, wherein an angle formed by at least one line of straightly connecting each center of the plurality of lens-shaped patterns and a horizontal axis of an LCD pixel formed at an upper surface of the body is more than 5.5° but smaller than 9.5°, wherein a discrete distance between the plurality of lens-shaped patterns is more than 5% but smaller than 15% of a diameter of the lens-shaped pattern, wherein a ratio of height to diameter of the lens-shaped pattern (lens height/lens diameter) is more than 0.3 but less than 0.6, and wherein an area formed by the plurality of lens-shaped patterns is more than 70% but less than 95% of an area of the body.