Patent ID: 8830579

Claim:
A micro-optical phase film, said micro-optical phase film being integrally formed, said micro-optical phase film comprising: an optical phase film base having a thickness and being rectangular from a point of view from top thereof, wherein said optical phase film has two lateral edges with an equal length and two longitudinal edges with an equal length; a concave surface disposed on said optical phase film base; and wherein said concave surface has a plurality of parallel concave and semi-cylinder like protrusions, said plurality of concave and semi-cylinder like protrusions being separated from each other in a constant pitch, a cylinder height being formed between highest points of said concave and semi-cylinder like protrusions and points at which said concave and semi-cylinder like protrusions start to protrude upwards, an angle being formed between axis directions of said concave and semi-cylinder like protrusions and arrangement phases of material molecules of said optical phase film.