OPTICAL FILM AND BACKLIGHT MODULE USING THE SAME

摘要

PURPOSE: An optical film and a backlight module using the same are provided to perform optical diffusion and optical concentration using a concentration layer which is arranged on the base film of a main body. CONSTITUTION: A main body(3) includes a first base film(31) and a second base film(32). The first base film includes the optical incident surface of the main body. The second base film includes the optical exit surface(311) of the main body. The optical incident surface forms a frosted surface(A) by a surface roughening treatment. An optical concentration layer(4) is formed on the optical exit surface.