Patent ID: 8183519

Claim:
A light concentrating module, comprising an optical film having a light incident surface and a light outgoing surface facing the light incident surface; an optical wedge element having a first surface, a second surface facing the first surface and having an angle with respect to the first surface and a third surface adjacent to the first and second surfaces; at least one photoelectric chip disposed near the third surface, wherein light from a light source penetrates the optical film, and the light enters the first surface of the optical wedge element by an appropriate incident angle and has total reflection between the first and second surfaces, whereby the light propagates in the optical wedge element, and the light leaves the optical wedge element from the third surface and is received by the photoelectric chip; a micro or nano meter structure formed on the light incident surface, and the micro or nano meter structure comprising a micro or nano meter layer formed on the optical film; and a micro meter structure formed on the light outgoing surface; wherein the micro or nano meter layer comprises a plurality of three-dimensional structures with a cross section having a width that is gradually large from a top to bottom portion, wherein the three dimensional structure has a period of 100˜600 nm and a height of 100˜570 nm.