An edge-type backlight unit having a plurality of rows of red, blue and green LEDs to provide a light source. In the backlight unit, a light guide plate has a light incidence part formed on a side surface thereof to receive light, the light guide plate inducing the light from the light incidence part to be emitted through a top surface of the light guide plate. A light source is disposed near the light incidence part of the light guide plate, and includes a plurality of red, green and blue light emitting diodes along the light incidence part. The light emitting diodes are grouped into at least three rows according to color. Here, the row of the green light emitting diodes is arranged most adjacent to the top surface of the light guide plate.

 
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> Optical sheet and backlight assembly of liquid crystal display with the same

~ 00420