OPTICAL FILM IMPROVED BRIGHTNESS

摘要

PURPOSE: An optical film with improved brightness is provided to reduce manufacturing costs by easily manufacturing a backlight unit. CONSTITUTION: An optical film has a lower surface with an embossed or engraved quadrangular pyramid shape(110). Light collected or diffused by the quadrangular pyramid is transmitted to a liquid crystal display panel. An embossed lens shape(120) is formed on the upper side of a base layer(130).