Liquid crystal display device having members for preventing shifting of the light guide plate and method of assembling the same

A liquid crystal display device, comprising:

• a liquid crystal panel;
• a backlight unit to provide a light to the liquid crystal panel, the backlight unit includes an optical sheet and a light guide plate;
• a main support to receive the liquid crystal panel and the backlight unit together, the main support having first and second movement preventing members to prevent shifting of the optical sheet and the light guide plate of the backlight unit in a direction on a plane, and a third movement preventing member to prevent shifting of the light guide plate of the backlight unit in a direction normal to the plane,
• wherein the first, second, and the third movement preventing members are formed at respective inner corners of the main support,
• wherein the third movement preventing member is formed of a protrusion on inner sides of the main support corresponding to the edge of the light guide plate such that the protrusion forms a slot, a portion of the light guide plate being inserted into the slot,
• wherein the protrusion of the third movement preventing member is parallel to the upper surface of the light guide plate, and
• wherein the third movement preventing member and the edge of the light guide plate overlap each other.