Rollable display device

1. A display device comprising:

a flexible display panel;

a roller having a curved surface on which the flexible display panel is selectively wound and unwound, the roller having a slit extending longitudinally along the curved surface of the roller, the slit being the only slit extending longitudinally along the curved surface from a first end of the roller to a second end of the roller;

a printed circuit board configured to control an operation of the flexible display panel, and located within the roller;

a case configured to house the roller;

an elevating mechanism configured to extend the flexible display panel from the case, and including a guide rail and a first link configured to elevate the guide rail; and

a first guide bracket connected to the first link, the first guide bracket including a first rotational link portion rotatably connected to the first link.

2. The display device of claim 1 , wherein the first guide bracket is configured to move linearly along the guide rail without rotating.

3. The display device of claim 1 , further comprising a second link and a second guide bracket,

wherein the first guide bracket is located at one end of the first link and movable along the guide rail, and

wherein the second guide bracket is located at one end of the second link and movable along the guide rail.

4. The display device of claim 3 , wherein the first link and the second link are rotatable in opposite directions to move the first guide bracket and the second guide bracket linearly along the guide rail.

5. The display device of claim 1 , wherein the guide rail is attached to the flexible display panel.

6. The display device of claim 1 , wherein the first guide bracket is located at one end of the first link and movable along the guide rail.

7. The display device of claim 1 , wherein the first guide bracket includes a guide portion located within the guide rail, and

wherein the first rotational link portion extends from the guide portion.

8. The display device of claim 7 , further comprising a second link and a second guide bracket,

wherein the first rotational link portion of the first guide bracket is rotatably connected to the first link, and a second rotational link portion of the second guide bracket is rotatably connected to the second link.

9. The display device of claim 8 , wherein the first link and the second link are rotatable in opposite directions, and

wherein the first guide bracket and the second guide bracket are configured to move linearly along the guide rail without rotating.

10. A display device comprising:

a flexible display panel;

a roller having a curved surface on which the flexible display panel is selectively wound and unwound;

a printed circuit board configured to control an operation of the flexible display panel, and located within the roller; and

a connecting unit configured to connect the flexible display panel to the printed circuit board, and disposed between the flexible display panel and the printed circuit board,

wherein the roller includes a slit extending longitudinally along the curved surface of the roller, the slit being the only slit extending longitudinally along the curved surface from a first end of the roller to a second end of the roller, and

wherein the connecting unit includes a flexible printed circuit (FPC) or a tape carrier package (TCP).

11. The display device of claim 10 , wherein the connecting unit is inserted into the slit of the roller.

12. The display device of claim 11 , wherein the connecting unit extends generally radially with respect to the roller.

13. The display device of claim 12 , wherein the connecting unit comprises a plurality of discrete FPC elements or TCP elements spaced apart from one another and spaced inwardly of opposite edges of the flexible display panel.

14. The display device of claim 13 , further comprising adhesive means configured to attach an edge portion of the flexible display panel to an outer surface of the roller.

15. The display device of claim 14 , wherein the adhesive means comprises an adhesive resin or an adhesive double-sided tape.

16. The display device of claim 10 , further comprising adhesive means configured to attach an edge portion of the flexible display panel to an outer surface of the roller.

17. The display device of claim 16 , wherein the adhesive means comprises an adhesive resin.

18. The display device of claim 16 , wherein the adhesive means comprises an adhesive double-sided tape.

19. The display device of claim 10 , wherein the connecting unit comprises a plurality of discrete FPC elements or TCP elements spaced apart from one another.

20. The display device of claim 10 , wherein the connecting unit is spaced inwardly of opposite edges of the flexible display panel.