Patent ID: 8561568

Claim:
An apparatus for manufacturing a light guide film, the light guide film comprising a substrate, a first patterned layer formed on a first side of the substrate, and a second patterned layer formed on an opposing second side of the substrate, the apparatus comprising: a first conveyor roller; a second conveyor roller; a first imprinting roller; a second imprinting roller opposite to the first imprinting roller, the first and second imprinting rollers configured for being respectively arranged on the opposite sides of the substrate; a first coating device positioned on the first side of the substrate between the first conveyor roller and the first imprinting roller for forming a first layer on the first side of the substrate; a second coating device positioned on the second side of the substrate between the first conveyor roller and the second imprinting roller for forming a second layer on the second side of the substrate; a first solidifying device positioned between the first imprinting roller and the second conveyor roller; a second solidifying device positioned between the second imprinting roller and the second conveyor roller; a first template having a first imprinting pattern comprising an array of through holes, the first template fixed on a circumferential surface of the first imprinting roller for imprinting cylindrical protrusions in the first layer; and a second template having a second imprinting pattern comprising an array of protrusions, the second template fixed on a circumferential surface of the second imprinting roller, for simultaneously imprinting cavities aligned with the cylindrical protrusions in the first layer; wherein the first conveyor roller and second conveyor roller are positioned under the substrate in contact with the second side of the substrate such that the first conveyor roller is disposed prior to the second coating device while the second conveyor roller is positioned after the second solidifying device for cooperatively conveying the light guide film.