Electronic device including flexible display

1. An electronic device comprising:

a first housing;

a second housing coupled to an edge of the first housing and configured to rotate about a folding axis extending in a first direction;

a third housing coupled to the first housing and disposed to be slidable toward or away from the folding axis;

a first roller rotatably mounted to an edge of the second housing,

at least one second roller disposed on or adjacent to a hinge structure; and

a flexible display including a first area disposed on the third housing and a second area extending from the first area and disposed through the first housing to the second housing,

wherein as the third housing slides, the second area slides on the first housing or the second housing, and a portion of the second area is selectively received in the second housings,

wherein the first roller and the at least one second roller are configured to slidably extend or withdraw the third housing while in a folded state.

2. The electronic device of claim 1 , wherein the second housing is configured to be pivotable between a first position where the second housing is disposed to face the first housing and a second position in which the second housing is unfolded at a designated angle from the first position.

3. The electronic device of claim 2 ,

wherein the second area is disposed to at least partially face away from the first area in the first position, and

wherein the second area is disposed at least partially in parallel to a side of the first area in the second position.

4. The electronic device of claim 2 , wherein, as the second housing pivots to the second position, a portion of the second area is gradually received in the second housing.

5. The electronic device of claim 2 , further comprising a sensor module disposed in the third housing and disposed to face away from the first area.

6. The electronic device of claim 5 , wherein in the first position, at least a portion of the second area is disposed adjacent to the sensor module.

7. The electronic device of claim 2 , wherein in the first position, as the third housing slides, the second area is configured to gradually expand or contract at a side of the first area.

8. The electronic device of claim 1 ,

wherein the hinge structure provides the folding axis and pivotably coupling the first housing and the second housing,

wherein the second area is disposed to partially cross the hinge structure between the first housing and the second housing.

9. The electronic device of claim 8 , wherein the hinge structure includes:

at least one hinge module;

a multi-bar assembly disposed between the hinge module and the flexible display and configured to support a portion of the second area between the first housing and the second housing; and

a hinge cover disposed to face the multi-bar assembly with the hinge module disposed therebetween.

10. The electronic device of claim 1 ,

wherein the second area is configured to be gradually received in or exposed to an outside of the second housing while being guided by the first roller.

11. The electronic device of claim 10 , further comprising:

a rack gear disposed in the second area;

a pinion gear rotatably disposed in the second housing and engaged with the rack gear; and

an interlocking member interlocking rotation of the first roller and the pinion gear,

wherein the pinion gear is configured to be rotated in conjunction with the first roller by the interlocking member to move the rack gear or the second area relative to the second housing.

12. The electronic device of claim 1 , further comprising:

a printed circuit board coupled to the third housing and disposed in the first housing;

at least one battery disposed in the second housing; and

a flexible printed circuit board extending from the battery and connected to the printed circuit board.

13. The electronic device of claim 12 , wherein the flexible printed circuit board is disposed to be partially curved and is configured so that the curved shape of the flexible printed circuit board is deformed as the third housing slides.

14. The electronic device of claim 1 , further comprising:

at least one processor operatively connected with the flexible display,

wherein the at least one processor is configured to:

identify one of a plurality of use states of the electronic device based on a deformation of the electronic device based on pivoting of the second housing and a slide of the third housing, and

activate at least a partial area among a plurality of display areas of the flexible display based on the use state.

15. The electronic device of claim 14 , wherein the plurality of use states of the electronic device includes at least one of:

a first use state in which the third housing is slid in away from the folding axis in a folded state of the second housing with respect to the first housing;

a second use state in which the third housing is slid in away from the folding axis in an unfolded state of the second housing with respect to the first housing;

a third use state in which the third housing is slid out toward the folding axis in the folded state of the second housing with respect to the first housing;

a fourth use state in which the third housing is slid out toward the folding axis in an unfolded state of the third housing with respect to the first housing; or

a fifth use state in which the third housing is mounted on a plane in a state in which the third housing is partially unfolded to be inclined with respect to the first housing.

16. The electronic device of claim 14 , wherein the deformation includes at least one of a folded/unfolded state or a slide-in/out state of the electronic device.

17. The electronic device of claim 14 , wherein the at least one processor is further configured to differently use a whole display area or a portion of the whole display area including the first area and the second area for each use state based on the deformation of the electronic device.