Flexible display device

A flexible display device comprising:

• a first body;
• a second body moving between a first position and a second position in a first direction relative to the first body;
• and
• a flexible display including a first region that is fixed in front of the first body to form a flat surface and, a first connection region that extends from the first region, and a second connection region that extends from the first connection region, wherein at the first position, the first connection region is bent to form a curved surface and the second connection region is parallel to the first region, and at the second position, the first connection region is coplanar with the first region, and a portion of the second connection region is bent to form a curved surface,
• wherein a plurality of spherical rolling balls arranged in the first direction are coupled to one of the first body and the second body, and at least one rolling recess in a form of a concave groove with a constant cross section is provided in another one of the first body and the second body in the first direction such that the rolling balls move in contact with the rolling recesses,
• wherein the first body includes:
• an inner edge provided with the rolling recess;
• a first magnet and a second magnet coupled to the inner edge, wherein the first magnet and the second magnet are located to be spaced apart from each other and to be respectively adjacent to opposite ends of the rolling recess, and
• wherein the second body includes:
• an outer edge located outside the inner edge, wherein the rolling balls are coupled to the outer edge;
• and
• a first stopper coupled to the outer edge, wherein the first stopper is configured to be in contact with or approach the first magnet at the first position so that an attractive force acts between the first stopper and the first magnet, and to be in contact with or approaches at the second position so that an attractive force acts between the first stopper and the second magnet.

A flexible display device comprising:

• a first body including a first inner edge and a second inner edge configured to provide opposite rims thereof;
• a second body including a first outer edge located outside the first inner edge and a second outer edge located outside the second inner edge, wherein the first outer edge and the second outer edge are configured to provide opposite rims of the second body, and the second body is configured to move relative to the first body in a longitudinal direction of the first inner edge;
• and
• a flexible display including a first region fixed in front of the first body and a second region extending from the first region and partially bent in a semicircular shape, and a bent position of the second region is changed depending on a movement of the second body,
• wherein the second body includes:
• a plurality of first rolling balls rotatably coupled to an inner surface of the first outer edge and coupled along a longitudinal direction of the first outer edge;
• and
• a plurality of second rolling balls rotatably coupled to an inner surface of the second outer edge and coupled along a longitudinal direction of the second outer edge, and
• wherein the first body includes:
• a first rolling recess provided on an outer surface of the first inner edge in a form of a concave groove so that the first rolling balls move while rolling;
• and
• a second rolling recess provided on an outer surface of the second inner edge in a form of a concave groove so that the second rolling balls move while rolling.