Expandable display device

1. An expandable display device comprising;

a flexible display panel that includes a first side on which a display unit is provided and a second side opposite to the first side, and that is supported by a housing;

a first slider that includes a first external guide that faces part of the first side and has a third curved side and a first internal guide that faces part of the second side and has a fourth curved side; and

a second slider that includes a second external guide that faces another part of the first side and has a fifth curved side and a second internal guide that faces another part of the second side and has a sixth curved side,

wherein a radius of the third curved side is greater than a radius of the fourth curved side, and

when the first slider moves toward the housing, the first side contacts the third curved side and is bent by the third curved side, and when the first slider moves away from the housing, the second side contacts the fourth curved side and is bent by the fourth curved side, and

wherein a first distance that is a maximum distance between curved portions of the flexible display panel in the first slider in a thickness direction of the expandable display device is larger than a second distance that is a maximum distance between flat portions of the flexible display panel in the thickness direction of the expandable display device.

2. The expandable display device of claim 1 , wherein

a curvature center of the third curved side corresponds to a curvature center of the fourth curved side,

a distance between the third curved side and the fourth curved side is greater than a thickness of the flexible display panel, and

the flexible display panel includes a portion that is separated from the third curved side of the first external guide and the fourth curved side of the first internal guide when the first slider is stationary.

3. The expandable display device of claim 2 , wherein

the first slider includes a first receiver connected to the first external guide and the first internal guide, and

the first receiver overlaps the housing and receives part of the flexible display panel in a reduction mode.

4. The expandable display device of claim 1 , wherein

a radius of the fifth curved side is greater than a radius of the sixth curved side, and

when the second slider moves toward the housing, the first side contacts the fifth curved side and is bent by the fifth curved side, and

when the second slider moves away from the housing, the second side contacts the sixth curved side and is bent by the sixth curved side.

5. The expandable display device of claim 4 , wherein

a curvature center of the fifth curved side corresponds to a curvature center of the sixth curved side,

a distance between the fifth curved side and the sixth curved side is greater than a thickness of the flexible display panel, and

the flexible display panel includes a portion that is separated from the fifth curved side of the second external guide and the sixth curved side of the second internal guide when the second slider is stationary.

6. The expandable display device of claim 5 , wherein

the second slider includes a second receiver connected to the second external guide and the second internal guide, and

the second receiver overlaps the housing, and receives another pan of the flexible display panel in a reduction mode.

7. The expandable display device of claim 1 , wherein

a curvature of the third curved side corresponds to a curvature of the fifth curved side, and

a curvature of the fourth curved side corresponds to a curvature of the sixth curved side.

8. The expandable display device of claim 1 , wherein

a curvature of the third curved side is different from the curvature of the fifth curved side, and

a curvature of the fourth curved side is different from the curvature of the sixth curved side.