OPTICAL SHEET FOR A BACKLIGHT UNIT

摘要

The present invention relates to an optical sheet for a backlight unit for use in a liquid crystal display device. The object of the present invention is to provide an optical sheet for a backlight unit, wherein the optical sheet which may include a diffusion sheet or a prism sheet and arranged in front of a light guide plate, has a rear surface comprising fine protrusions, so as to prevent a wet-out phenomenon caused by the surface-contact between the light guide plate and the optical sheet, and to simultaneously prevent damage to the light guide plate caused by beads. To accomplish the object, the optical sheet of the present invention is arranged in front of the light guide plate so as to constitute a backlight unit, wherein the optical sheet comprises: a light-transmitting base film made of a resin material; and a plurality of fine protrusions integrally formed with the rear surface of the base film, or formed on a coating portion made of a resin material on the rear surface of the base film, so as to contact the front surface of the light guide plate.