PRISM SHEET AND BACK LIGHT UNIT

摘要

A prism sheet and a back light unit employing the prism sheet are provided to remove light of a side lobe region and prevent light from leaking by forming reflection patterns on the surface of a condensing film on which a plurality of prisms are formed. A back light unit includes at least one lamp generating light, a light guide plate, and a prism sheet. The light guide plate converts the progressing direction of a light inputted from the lamp through a light-receiving face formed at the side surface into a vertical direction. The prism sheet includes a condensing film(152) transmitting light that has passed through the light guide plate, a plurality of prisms(154) formed on the condensing film, and a plurality of reflection patterns(156) formed on the focusing film to reflect incident light.