Patent ID: 7237939

Claim:
A backlight assembly for emitting a light in two directions, comprising: a lamp assembly disposed between a first display area and a second display area, for providing a first light and a fifth light into a space between the first and second display areas, the first and fifth lights having a path different to each other; a first light guide plate having a first light incident surface for changing the first light into a second light, a first surface for reflecting a portion of the second light to the first display area as a third light and a second surface for emitting the third light, the second surface being faced to the first surface; a second light guide plate having a second light incident surface for changing the fifth light into a sixth light, a third surface for reflecting a portion of the sixth light to the second display area as a seventh light and a fourth surface for emitting the seventh light, the fourth surface being faced to the third surface; and a reflecting plate disposed between the first and third surfaces, reflecting a portion of the second light leaked from the first surface to the first display area as a fourth light and reflecting a portion of the sixth light leaked from the third surface to the second display area as an eighth light; wherein the first light guide plate has a thickness that becomes thicker as it is near to the first light incident surface, the second light guide plate has a thickness that becomes thinner as it is near to the second light incident surface and the second surface is parallel to the fourth surface.