Display device

1. A display device, comprising:

an insulating substrate comprising a first main surface;

a first supporting substrate adhered to the first main surface of the insulating substrate;

a second supporting substrate spaced from the first supporting substrate and adhered to the first main surface of the insulating substrate,

wherein

the first supporting substrate comprising a first side surface opposing the second supporting substrate,

the second supporting substrate comprising a second side surface opposing the first supporting substrate,

the first supporting substrate being formed into a tapered shape that narrows toward the first side surface, and

the second supporting substrate being formed into a tapered shape that narrows toward the second side surface;

a film located on a side of the insulating substrate that is an opposite side to the first main surface;

a resin layer located on a side of the insulating substrate that is an opposite side to the second supporting substrate; and

a mounting portion that overlaps the second supporting substrate,

wherein

the film comprises a superposing portion that overlaps the resin layer,

the film and the resin layer have an equal absorptivity for light of a short wavelength less than 350 nm, and

the superposing portion has a first thickness at a first position and a second thickness at a second position that is closer to the mounting portion than the first position, the first thickness being greater than the second thickness.

2. The device of claim 1 , wherein

the first side surface and the second side surface each include a curved surface.

3. The device of claim 1 , wherein

the resin layer has a third thickness at a third position that overlaps the superposing portion, and a fourth thickness at a fourth position that overlaps the superposing portion and is closer to the mounting portion than the third position, the third thickness being less than the fourth thickness.

4. The device of claim 1 , wherein

a thickness of the film at a position that overlaps a display area is equal to or less than a thickness of the resin layer at a position that overlaps the second supporting substrate.

5. The device of claim 1 , wherein

a total of the thickness of the film and the thickness of the resin layer at a position that overlaps the superposing portion is less than or equal to a thickness of the film at a position that overlaps the display area.

6. The device of claim 1 , wherein

a thickness of the resin layer is less than a thickness of the film at a position that overlaps the superposing portion.

7. The device of claim 1 , wherein

the film comprises an edge surface in contact with the resin layer, and

the edge surface includes a curved surface.

8. The device of claim 1 , wherein

the film comprises an edge surface in contact with the resin layer, and

the edge surface includes an inclined surface.

9. The device of claim 1 , further comprising:

a bend area to be bent between the first supporting substrate and the second supporting substrate.

10. The device of claim 1 , wherein

the first supporting substrate and the second supporting substrate are each formed of polyethylene terephthalate.

11. The device of claim 1 , wherein

the first supporting substrate comprises a first upper surface adhered to the first main surface of the insulating substrate, and a first lower surface on an opposite side to the first upper surface,

the second supporting substrate comprising a second upper surface adhered to the first main surface, and a second lower surface on an opposite side to the second upper surface, and

a distance between the first upper surface and the second upper surface is less than a distance between the first lower surface and the second lower surface.

12. The device of claim 9 , wherein

the bend area overlaps the resin layer.