BACK LIGHT UNIT HAVING SAG CONTROL PATTERNS

摘要

PURPOSE: A backlight unit with a sag control pattern is provided to control a sag of a pattern formed on a light guide plate, thereby increasing light efficiency emitted from a backlight unit. CONSTITUTION: The more a sag increases, the farther a pattern of a micro lens formed on a light guide plate(140) becomes from a light source(110). The pattern of the micro lens formed on the light guide plate realizes an embossed pattern and an intaglio pattern. If the pattern of the micro lens is the intaglio pattern, more excellent brightness and uniformity are realized. The pattern of the micro lens is uniformly arranged on the entire light guide plate.