Patent ID: 7269328
Filing Date: 2007-09-11
Classification: G02B,Y10S

Abstract:
1. A brightness enhancement film having a light-guiding structure comprising: a substrate having a light incident surface and a light emission surface, the substrate made from a first transparent material which permits penetrating light through the substrate; a light-refracting layer arranged on the light incident surface of the substrate, the light-refracting layer providing changes in curvature so as to refract the light projecting from a light source; a light-guiding layer formed between the light incident surface and the light emission surface of the substrate so as to guide the refracted light transmitting from the light incident surface to the light emission surface; and a reinforcing layer formed on the light emission surface of the substrate, said reinforcing layer being made from a second transparent material while the light-guiding layer of the substrate is made from the first transparent material; wherein the reinforcing layer has a thickness which can be selectively changed depending on that of the light-guiding layer.