Display device

Patent metadata

Field	Value
Publication number	US-10342124-B2
Application number	US-201514735671-A
Country	US
Kind code	B2
Filing date	Jun 10, 2015
Priority date	Jun 13, 2014
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Provided is a display device or an input/output device in which reflection of outside light is reduced. The display device includes a first substrate and a second substrate. The first substrate includes a first surface. A transistor is over the first surface. The second substrate includes a second surface. A first structure having a projection, a second structure having a projection, a black matrix covering the first structure and the second structure, and a color filter are over the second surface. The first surface faces the second surface. The black matrix has a plurality of projections reflecting the projection of the first structure and the projection of the second structure. A planar shape of the first structure is different from a planar shape of the second structure.

First claim

The invention claimed is:

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 comp

Assignees

• Semiconductor Energy Lab

Inventors

• Jikumaru Mika
• Kubota Daisuke
• Miyairi Noriko
• Nagata Takaaki

Classifications

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/13394

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• H01L27/3258

  Electricity · mapped topic

• H01L51/5225

  Electricity · mapped topic