Display device including touch screen panel

1. A display device comprising:

a display panel configured to display an image, the display panel including a first pad unit;

a touch screen panel (TSP) attached to an upper portion of the display panel, the touch screen panel including a second pad unit;

a first flexible printed circuit board configured to include a first connection part that is connected to the second pad unit of the touch screen panel and overlaps the second pad unit;

a window substrate configured to cover the touch screen panel; and

a first adhesive layer interposed between the touch screen panel and the window substrate to adhere the window substrate to the touch screen panel,

wherein:

the first adhesive layer includes a portion which is interposed between the window substrate and the first connection part, the portion at least partially covers the first connection part;

a reinforcement film is interposed between the touch screen panel and the window substrate;

the reinforcement film does not contact the window substrate; and

an optical film including a polarization film is interposed between the display panel and the touch screen panel.

2. The display device of claim 1 , wherein the first connection part is secured to the window substrate by the first adhesive layer.

3. The display device of claim 1 , wherein the first adhesive layer is formed to extend from a central portion facing a portion between the touch screen panel and the window substrate, to cover the first connection part.

4. The display device of claim 1 , wherein the first adhesive layer further includes an auxiliary TSP adhering member having one surface attached to at least one of the first connection part and the second pad unit, and another surface that is attached to the first adhesive layer.

5. The display device of claim 1 , wherein the first adhesive layer further includes an auxiliary TSP adhering member having one surface attached to at least one of the first connection part and the second pad unit, and another surface that is attached to the window substrate.

6. The display device of claim 1 , wherein the first adhesive layer is disposed to protrude from a boundary of an edge of the touch screen panel to cover a portion of the first flexible printed circuit board that is adjacent to the first connection part.

7. The display device of claim 6 , wherein the portion of the first flexible printed circuit board that is adjacent to the first connection part is secured to the window substrate by the first adhesive layer.

8. The display device of claim 1 , wherein a touch driving integrated circuit is mounted on the touch screen panel, and

the first adhesive layer is formed to cover the touch driving integrated circuit.

9. The display device of claim 1 , wherein the first adhesive layer is formed of an optically clear adhesive (OCA).

10. The display device of claim 1 , wherein an area of optical film is smaller than an area of the display panel.

11. The display device of claim 1 , wherein the first adhesive layer is interposed between the reinforcement film and the window substrate to adhere the window substrate to the reinforcement film.

12. The display device of claim 11 , wherein the reinforcement film has an area that is smaller than an area of the touch screen panel and the window substrate, a boundary of at least one side of the reinforcement film is positioned at a more inner side than a boundary of the touch screen panel, and

the first flexible printed circuit board is connected to an edge of the touch screen panel adjacent to the reinforcement film.

13. The display device of claim 12 , wherein the first adhesive layer is formed to extend over a boundary of the reinforcement film, to cover the first connection part.

14. The display device of claim 1 , wherein a second adhesive layer is interposed between the reinforcement film and the touch screen panel to attach the reinforcement film to the touch screen panel.

15. The display device of claim 1 , further comprising:

a second flexible printed circuit board configured to include a second connection part that is connected to the first pad unit; and

a third adhesive layer interposed between the optical film and the touch screen panel,

wherein the third adhesive layer is formed such that the third adhesive layer at least partially covers the second connection part.

16. The display device of claim 15 , wherein the second connection part is secured to the touch screen panel by the third adhesive layer.

17. The display device of claim 15 , wherein the third adhesive layer is formed to extend from a central portion facing a portion between the touch screen panel and the window substrate, to cover the second connection part.

18. The display device of claim 15 , wherein the third adhesive layer further includes an auxiliary display panel adhering member having one surface attached to at least one of the second connection part and the first pad unit, and another surface that is attached to the third adhesive layer.

19. The display device of claim 15 , wherein the third adhesive layer further includes an auxiliary display panel adhering member having one surface attached to at least one of the second connection part and the first pad unit, and another surface that is attached to the touch screen panel.

20. The display device of claim 15 , wherein a display driving integrated circuit is mounted on the display panel, and

the third adhesive layer is formed to cover the display driving integrated circuit.