Foldable display device

Abstract

A foldable display device includes a support structure, a display structure, and an intermediate structure. The support structure includes a planar portion and a bent portion adjacent to the planar portion, and the intermediate structure is sandwiched between the support structure and the display structure. The planar portion has a first surface facing the display structure, and the bent portion has a second surface facing the display structure. The distance between the first surface and the display structure is greater than the distance between the second surface and the display structure. The intermediate structure is disposed on the first surface but not on the second surface, and directly contacts the support structure and the display structure.

Claims

1. A foldable display device having a planar area and a bending area adjacent to the planar area, and comprising: A support structure includes a planar portion and a bent portion adjacent to the planar portion, wherein the planar portion is located in the planar region and the bent portion is located in the bent region; a display structure; and an intermediate structure sandwiched between the support structure and the display structure, wherein the planar portion has a first surface facing the display structure, the bent portion has a second surface facing the display structure, the distance between the first surface and the display structure is greater than the distance between the second surface and the display structure, and the intermediate structure is disposed on the first surface but not on the second surface, and directly contacts the support structure and the display structure.

2. The foldable display device as claimed in claim 1, wherein the second surface has a buffer surface connecting the first surface, and the buffer surface is a curved surface or an inclined surface.

3. The foldable display device as described in claim 2, wherein the radius of curvature of the surface is not less than 5 micrometers.

4. The foldable display device as claimed in claim 2, wherein the angle between the inclined plane and the normal of the first surface is not less than 45 degrees.

5. The foldable display device as claimed in claim 1, wherein the thickness of the planar portion gradually decreases from the direction away from the bending portion toward the direction of approaching the bending portion.

6. The foldable display device as described in claim 1, wherein the support structure comprises: A substrate extends from the planar region to the bending region and has the first surface; And an additional layer, stacked on the substrate and located in the bending area, having the second surface.

7. The foldable display device as claimed in claim 6, wherein the material of the substrate is the same as the material of the additional layer.

8. The foldable display device as claimed in claim 6, wherein the substrate has a plurality of first through holes in the bending region and the additional layer has a plurality of second through holes.

9. The foldable display device as claimed in claim 1, wherein the support structure comprises: A substrate extends from the planar region to the bending region, wherein the substrate has a first surface and a second surface in the planar region and the bending region, respectively, and has a third surface opposite to the first surface and a fourth surface opposite to the second surface in the planar region and the bending region, respectively, wherein the second surface protrudes from the first surface and the third surface protrudes from the fourth surface.

10. The foldable display device as described in claim 1, wherein the intermediate structure comprises: An adhesive layer directly contacts and bonds the planar portion and the display structure, wherein the adhesive layer has an adhesive surface that faces and directly contacts the display structure, and the distance between the adhesive surface and the second surface is no more than 10 micrometers.

11. The foldable display device as described in claim 1, wherein the intermediate structure comprises: One layer of adhesive; And a planar electromagnetic induction layer, wherein the adhesive layer directly contacts and bonds the planar portion and the planar electromagnetic induction layer, the planar electromagnetic induction layer having a sensing surface facing the display structure, and the distance between the sensing surface and the second surface is no greater than 10 micrometers.

12. The foldable display device as described in claim 11, further comprising: A bent electromagnetic induction layer, wherein the bent portion has a bent surface opposite to the second surface, and the bent electromagnetic induction layer is disposed on the bent surface.

13. The foldable display device as claimed in claim 1, wherein the material of the planar portion is different from the material of the bent portion.

14. The foldable display device as claimed in claim 1, wherein the planar portion and the bent portion are each a stacked structure, and the number of stacks in the planar portion is less than the number of stacks in the bent portion.

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