LIGHT GUIDE FILM WITH MULTI-FACETED LIGHT INPUT EDGE

摘要

PURPOSE: A light guide film of an LED backlight unit having a plurality of multiple-face structures engraved into an incident plane of a light guide film is provided to uniformly distribute light from point light sources by increasing an incident angle as large as a transmissible incident angle through a light guide film. CONSTITUTION: A light guide film uniformly distributing light from a point light source includes a multiple-face edge, and the multiple-face edge includes a first set and a second set of inclined surfaces having a plane therebetween, a respective set of inclined surfaces has a first inclination and a second inclination and the first inclination is not greater than 85°and the second inclination is at least 5°, and the first inclination is at least 5°greater than that of the second inclination.