BACK LIGHT UNIT WITH LIGHT GUIDE PLATE PREVENTING DARK AREA BETWEEN LEDS

摘要

A backlight unit with a light guide plate preventing a dark area between LEDs is provided, wherein dark area-preventing patterns may adequately compensate for the brightness in a gap between the LEDs that may be a dark area even under the condition that the gap is relatively large and greater than or equal to the width of an LED and thus, uniform brightness may be obtained without an occurrence of the dark area. Accordingly, the number of the LEDs may decrease and thus, a large-sized backlight unit may be fabricated with a relatively low cost.

主权项

1. A backlight unit, comprising:
a plurality of LEDs disposed on a bar-shaped circuit board and separated from one another at a predetermined interval; and a light guide plate having a plurality of light guide patterns formed on one portion of the light guide plate that reflect, refract, or scatter lights incident from the LEDs to disperse the light in numerous directions and having a plurality of dark area-preventing patterns formed at a position corresponding to the gap between the LEDs to prevent a dark area between the LEDs, wherein the dark area-preventing patterns are engraved with a relatively greater depth than that of the light guide patterns to reflect, refract, or scatter again a light passing through the dark area among lights dispersing in the numerous directions by the light guide patterns, to compensate for brightness in the dark area, and to prevent an occurrence of the dark area.