Patent ID: 8098348

Claim:
A backlight assembly comprising: a light source generating light; and a light-guide plate guiding the light, the light-guide plate comprising: a base plate having a light incident surface facing the light source and a light exiting surface disposed away from the light source as compared to the light incident surface; first protrusion patterns formed on a left portion of the light exiting surface of the base plate with respect to a central line of the light exiting surface, a cross-section of the first protrusion patterns having a trapezoidal shape, which has a top and a bottom substantially parallel with each other and first and second inclined sides inclined at different angles with respect to the bottom; and second protrusion patterns formed on a right portion of the light exiting surface with respect to the central line, a cross-section of the second protrusion patterns having a trapezoidal shape substantially symmetrical to the trapezoidal shape of the first protrusion patterns with respect to the central line, and disposed substantially symmetrical to the first protrusion patterns with respect to the central line.