CONDENSING FILM HAVING A GOOD OPTICAL PROPERTIES AND BACKLIGHT UNIT USING THE SAME

摘要

PURPOSE: An optical film with superior optical property and a back light unit with the same are provided to improve image quality without decreasing luminance by widely forming slow protrusions of the bubble form on the lower part of a film. CONSTITUTION: An optical film comprises a base part(20), a light-collecting part(30) and a light diffusion part(40). The base part supports the light-collecting part and the light diffusion part. The base part is composed of a transparent macromolecular film. The base part has fixed thickness to support the light-collecting part and the light diffusion part. The thickness of the base part is 30-350 micron. The light-collecting part deflects the light outputted from the light source and improves the luminance at the visible range. The light-collecting part is located on the upper side of the base part. The light-collecting part is consecutively arranged by consecutively arranging lenticular lenses.