| 摘要 |
According to an embodiment of the present invention, an edge-type back light unit using a back-prism sheet arranges a film with improved penetration ratio on an upper part of the back-prism sheet, controls a penetration axis of the back-prism sheet and a penetration axis of the film with improved penetration ratio, makes lights emitted from the film with improved penetration ratio approach a penetration axis of a polarized plate of the rear of a liquid crystal panel, and minimizes optical attenuation and reduces visibility about a white point by improving penetration ratio which is a ratio of lights passing through the liquid crystal panel. |
