Display device

1. A display device comprising:

a first substrate comprising a first surface;

a second substrate comprising a second surface; and

a transistor over the first surface,

wherein a first structure having a projection, a second structure having a projection, a black matrix covering the first structure and the second structure, an overcoat layer formed by a polyimide resin, an epoxy resin, or an acrylic resin covering the black matrix, and a color filter are provided over the second surface,

wherein the first surface faces the second surface,

wherein the black matrix has a plurality of projections reflecting the projection of the first structure and the projection of the second structure,

wherein a bottom surface of the black matrix is in direct contact with the first structure and the second structure,

wherein a planar shape of the first structure is different from a planar shape of the second structure, and

wherein the black matrix is a single-layer structure.

2. The display device according to claim 1 , wherein the first structure and the second structure comprise a portion connected to each other.

3. The display device according to claim 1 , wherein the first structure and the second structure each comprises a region having a thickness of greater than or equal to 0.2 μm and less than or equal to 3 μm.

4. The display device according to claim 1 , wherein each of an angle between a side surface of the first structure and the second surface and an angle between a side surface of the second structure and the second surface is greater than or equal to 2° and less than or equal to 80°.

5. The display device according to claim 1 , wherein a thickness of the first structure is different from a thickness of the second structure.

6. The display device according to claim 1 , wherein a refractive index of each of the first structure and the second structure is higher than a refractive index of the black matrix.

7. The display device according to claim 1 , wherein each of the planar shape of the first structure and the planar shape of the second structure does not have rotational symmetry.

8. A display device comprising:

a first substrate comprising a first surface; and

a second substrate comprising a second surface,

wherein a first transistor, an insulating layer, and a light-emitting element over the insulating layer are provided over the first surface,

wherein a first structure having a projection, a second structure having a projection, a black matrix covering the first structure and the second structure, an overcoat layer formed by a polyimide resin, an epoxy resin, or an acrylic resin covering the black matrix, and a color filter are provided over and in contact with the second surface,

wherein the first surface faces the second surface,

wherein the insulating layer has a plurality of depressions,

wherein the light-emitting element comprises a first electrode, a second electrode, and a layer containing a light-emitting material between the first electrode and the second electrode,

wherein the first electrode has a plurality of depressions reflecting the plurality of depressions of the insulating layer,

wherein planar shapes of the plurality of depressions of the insulating layer are different from each other,

wherein the black matrix has a plurality of projections reflecting the projection of the first structure and the projection of the second structure,

wherein a bottom surface of the black matrix is in direct contact with the first structure and the second structure, and

wherein the black matrix is a single-layer structure.

9. The display device according to claim 8 ,

wherein a first pixel and a second pixel are provided over the first surface, and

wherein a planar shape of the depression in the first pixel is a planar shape in which the depression in the second pixel is rotated 90°.

10. The display device according to claim 8 , wherein the planar shape of the depression does not have rotational symmetry.

11. The display device according to claim 8 , wherein the first structure and the second structure comprise a portion connected to each other.

12. The display device according to claim 8 , wherein a thickness of the first structure is different from a thickness of the second structure.

13. The display device according to claim 8 , wherein a refractive index of each of the first structure and the second structure is higher than a refractive index of the black matrix.

14. The display device according to claim 9 ,

wherein a third pixel and a fourth pixel are provided over the first surface,

wherein the third pixel overlaps with the first structure,

wherein the fourth pixel overlaps with the second structure, and

wherein a planar shape of the first structure is a planar shape in which the second structure is rotated 90°.

15. The display device according to claim 8 , wherein each of the planar shape of the first structure and the planar shape of the second structure does not have rotational symmetry.

16. A display device comprising:

a first substrate comprising a first surface; and

a second substrate comprising a second surface,

wherein a first transistor, an insulating layer, and a third electrode over the insulating layer are provided over the first surface,

wherein a first structure having a projection, a second structure having a projection, a black matrix covering the first structure and the second structure, and an overcoat layer formed by a polyimide resin, an epoxy resin, or an acrylic resin covering the black matrix are provided over the second surface,

wherein the first surface faces the second surface,

wherein the black matrix has a plurality of projections reflecting the projection of the first structure and the projection of the second structure,

wherein a bottom surface of the black matrix is in direct contact with the first structure and the second structure,

wherein a planar shape of the first structure is different from a planar shape of the second structure,

wherein the black matrix is a single-layer structure,

wherein a liquid crystal layer is between the first substrate and the second substrate, and

wherein the insulating layer has a plurality of depressions.

17. The display device according to claim 16 , wherein the first structure and the second structure comprise a portion connected to each other.

18. The display device according to claim 16 , wherein a thickness of the first structure is different from a thickness of the second structure.

19. The display device according to claim 16 , wherein each of a refractive index of the first structure and the second structure is higher than a refractive index of the black matrix.

20. The display device according to claim 16 , wherein each of the planar shape of the first structure and the planar shape of the second structure does not have rotational symmetry.

21. An input/output device comprising:

the display device according to claim 1 ; and

a sensor element,

wherein the sensor element is provided over the second surface,

wherein the sensor element comprises a first conductive layer, a second conductive layer, and a dielectric layer, and

wherein the dielectric layer is between the first conductive layer and the second conductive layer.

22. An input/output device comprising:

the display device according to claim 16 ; and

an input device,

wherein the input device is provided over the second surface,

wherein the input device comprises a second transistor and a sensor element,

wherein the sensor element comprises a first conductive layer, a second conductive layer, and a dielectric layer,

wherein the dielectric layer is between the first conductive layer and the second conductive layer, and

wherein the second transistor is electrically connected to the sensor element.

23. The input/output device according to claim 21 ,

wherein a third conductive layer is provided over the second surface,

wherein the third conductive layer is electrically connected to at least one of the first conductive layer and the second conductive layer, and

wherein a part of the third conductive layer is between the black matrix and the first substrate.

24. An electronic device comprising:

the input/output device according to claim 21 ; and

a microphone, a speaker, a battery, an operational switch, or a housing.

25. The display device according to claim 1 ,

wherein each of the first structure and the second structure is in direct contact with the second surface of the second substrate, and

wherein the first structure and the second structure comprise photopolymer, photosensitive acrylic, or photosensitive polyimide.

26. The display device according to claim 8 ,

wherein each of the first structure and the second structure is in direct contact with the second surface of the second substrate, and

wherein the first structure and the second structure comprise photopolymer, photosensitive acrylic, or photosensitive polyimide.

27. The display device according to claim 16 ,

wherein each of the first structure and the second structure is in direct contact with the second surface of the second substrate, and

wherein the first structure and the second structure comprise photopolymer, photosensitive acrylic, or photosensitive polyimide.