Patent ID: 8625049

Claim:
A display device comprising: a display panel having a plurality of electrodes and pixels; a backlight provided adjacent to the display panel, the backlight unit including at least one light guide panel having at least one light incident area to receive light from a first direction and a light emitting area to emit light received through the light incident area in a second direction, the first and second directions being different directions; at least one light source, at least one incident area of the light guide panel being adjacent to at least one light source to receive light output; a reflector adjacent to the light guide panel to reflect light towards the second direction; and at least one optical sheet provided between the display panel and the backlight, the at least one optical sheet including a first optical sheet; and a cover provided adjacent to the display panel or the backlight, wherein the cover includes a first rail near a first side of the cover and a second rail near a second side of the cover, the first and second sides being opposite sides, the first optical sheet has a first slot near a first side and a second slot near a second side, the first and second sides being opposite sides of the first optical sheet, and the first slot is fitted over the first rail and the second slot is fitted over the second rail, wherein the cover further includes a third rail near a third side, which is between the first and second sides, and the first optical sheet further includes a third slot near third side, which is between the first and second sides of the first optical sheet, the third slot being fitted over the third rail, wherein the first side and the second side of the optical sheet are longer than the third side of the optical sheet, and wherein the first slot is smaller than the second slot and the third slot.