Display device

1. A display device comprising:

a display panel including a front surface and a rear surface opposite to each other;

a first circuit board electrically connected to a first side of the display panel;

a second circuit board electrically connected to a second side opposite to the first side of the display panel;

a third circuit board disposed on the rear surface of the display panel and electrically connecting the first circuit board to the second circuit board, wherein the third circuit board extends in a first direction from the first side of the display panel to the second side of the display panel; and

a support plate disposed on the rear surface of the display panel,

wherein the display panel is foldable along a folding line extending in a second direction crossing the first direction,

wherein the support plate has a first opening extending along the folding line, and an opening pattern near a portion of the first opening,

wherein the third circuit board overlaps the portion of the first opening,

wherein the opening pattern includes a plurality of slits and the third circuit board overlaps the plurality of slits, and

wherein each of the plurality of slits has a width, in the second direction, smaller than a width, in the second direction, of the first opening.

2. The display device of claim 1 , wherein

the plurality of slits are spaced apart from each other in the first direction.

3. The display device of claim 2 , further comprising

an adhesive layer disposed between the third circuit board and the support plate.

4. The display device of claim 2 , wherein

a width of the second direction of the third circuit board is smaller than or equal to a width of the second direction of a pattern area of the support plate on which the plurality of slits are disposed.

5. The display device of claim 4 , wherein

the opening pattern further includes:

a first vertical opening extending in the first direction along a first edge of the pattern area; and

a second vertical opening extending in the first direction along a second edge opposite to the first edge,

a distance of the second direction between an edge of the third circuit board and an edge of the first vertical opening is 0 mm or more, and

the edge of the third circuit board and the edge of the first vertical opening are closer to the first edge of the pattern area than a second edge, opposite to the first edge, of the pattern area.

6. The display device of claim 2 , wherein

a width of the third circuit board in the second direction is greater than a width of the second direction of a pattern area of the support plate on which the plurality of slits are disposed.

7. The display device of claim 6 , wherein

the opening pattern further includes a vertical opening extending in the first direction along an edge of the pattern area, and

the third circuit board overlaps the vertical opening.

8. The display device of claim 2 , wherein

the support plate further has a horizontal opening spaced in the first direction apart from a pattern area of the support plate on which the plurality of slits are disposed,

the horizontal opening extends in the second direction, and

the third circuit board passes through the horizontal opening.

9. The display device of claim 8 , wherein

a portion of the third circuit board overlapping the pattern area of the support plate is disposed between the support plate and the display panel.

10. The display device of claim 1 , wherein

the support plate includes metal, and

the third circuit board is flexible.

11. The display device of claim 1 , wherein

the support plate includes a first surface facing the display panel and a second surface opposite to the first surface,

the support plate has a hole provided in the second surface,

the third circuit board and the hole extend in the first direction, and

the third circuit board is disposed in the hole.

12. The display device of claim 11 , wherein

the plurality of slits are adjacent to the hole in a thickness direction of the support plate.