Optical film for enlarging viewing angle and TFT-LCD device including the same

摘要

The viewing angle enhancement film contains a substrate and a prism layer fixedly attached to the substrate. A light emission face of the prism layer contacts a light incident face of the substrate. The prism layer and the substrate are both made of transparent materials. Multiple separate triangular prisms are configured along a light incident face of the prism layer with a flat face between neighboring triangular prisms. The TFT-LCD device contains a first polarizer film, a LCD panel, a color filter film, a second polarizer film, and a viewing angle enhancement film described above, arranged sequentially along a light propagation direction. A light incident face of the viewing angle enhancement film faces a light emission face of the second polarizer film. The TFT-LCD device equipped with the viewing angle enhancement film is able to provide enlarged viewing angle and superior image quality.