A backlight assembly having a plurality of light emitting diodes (LEDs) and a light guide plate for uniformly guiding light emitted from the LEDs to a liquid crystal substrate is provided. The backlight assembly includes a reflective structure having at least one reflective surface facing the LEDs and tilted at a constant angle. The light emitted from the LEDs is reflected by the reflective surface to have the shape of light emitted from a line light source and be incident on the light guide plate. In effect, hot spots degrading screen quality and screen brightness distribution non-uniformity can be prevented.