Display device

Patent metadata

Field	Value
Publication number	US-10153460-B2
Application number	US-201715671443-A
Country	US
Kind code	B2
Filing date	Aug 8, 2017
Priority date	Aug 17, 2016
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A light extraction efficiency is increased in a display device having a plurality of display elements. The display device includes a first display element and a second display element over the first display element, and the first display element has a convex-concave shape. The convex-concave shape overlaps with a first opening provided in a reflective electrode of the second display element. A user can see an image that combines the display from the first display element and the display from the second display element. The convex-concave shape increases the light extraction efficiency of the first display element. The second display element is electrically connected to a transistor through a second opening provided in any layer of the first display element. The second display element can be provided close to the first display element.

First claim

What is claimed is:

1. A display device comprising:
a first display element; and
a second display element over the first display element,
wherein the first display element has a convex-concave shape,
wherein the second display element includes an electrode configured to reflect visible light,
wherein the first display element is electrically connected to a first transistor,
wherein the second display element is electrically connected to a second transistor through the electrode,
wherein any one of layers included in the first display element includes a first opening,
wherein the electrode includes a first region and a second region,
wherein the first region includes a second opening overlapping with the convex-concave shape, and
wherein the second region includes a region provided in the first opening.

2. The display device according to claim 1 ,
wherein the first opening is provided in a light-emitting layer included in the first display element.

3. The display device according to claim 1 ,
wherein an electrode of the first display element includes a third region and a fourth region,
wherein the third region is covered with a partition,
wherein the fourth region includes a region provided in a third opening,
wherein a surface of the fourth region has a concave portion, and
wherein the concave portion is not covered with the partition.

4. The display device according to claim 1 ,
wherein the first display element is a light-emitting element, and
wherein the second display element is a liquid crystal element.

5. The display device according to claim 1 ,
wherein the first transistor or the second transistor includes a channel formation region formed in a metal oxide layer.

6. The display device according to claim 1 ,
wherein the second display element includes a second electrode over the electrode, and
wherein the second electrode includes a region overlapping with the second opening.

7. A display device comprising:
a first display element over an insulating film; and
a second display element over the first display element,
wherein a surface of the insulating film has a first convex-concave shape,
wherein the first display element has a second convex-concave shape along the first convex-concave shape,
wherein the second display element includes an electrode configured to reflect visible light,
wherein the first display element is electrically connected to a first transistor,
wherein the second display element is electrically connected to a second transistor through the electrode,
wherein any one of layers included in the first display element includes a first opening,
wherein the electrode includes a first region and a second region,
wherein the first region includes a second opening overlapping with the second convex-concave shape, and
wherein the second region includes a region provided in the first opening.

8. The display device according to claim 7 ,
wherein the first opening is provided in a light-emitting layer included in the first display element.

9. The display device according to claim 7 ,
wherein an electrode of the first display element includes a third region and a fourth region,
wherein the third region is covered with a partition,
wherein the fourth region includes a region provided in a third opening,
wherein a surface of the fourth region has a concave portion, and
wherein the concave portion is not covered with the partition.

10. The display device according to claim 7 ,
wherein the first display element is a light-emitting element, and
wherein the second display element is a liquid crystal element.

11. The display device according to claim 7 ,
wherein the first transistor or the second transistor includes a channel formation region formed in a metal oxide layer.

12. The display device according to claim 7 ,
wherein the second display element includes a second electrode over the electrode, and
wherein the second electrode includes a region overlapping with the second opening.

13. A display device comprising:
a first display element over an insulating film; and
a second display element over the first display element,
wherein a surface of the insulating film has a first convex-concave shape,
wherein the first display element has a second convex-concave shape along the first convex-concave shape,
wherein the second display element includes an electrode configured to reflect visible light, and
wherein the electrode includes an opening overlapping with the second convex-concave shape.

14. The display device according to claim 13 ,
wherein the first display element is a light-emitting element, and
wherein the second display element is a liquid crystal element.

Assignees

• Semiconductor Energy Lab

Inventors

• Isaka Fumito
• Ikeda Hisao

Classifications

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K50/856 Primary

  comprising reflective means · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• H01L51/5271 Primary

  Electricity · mapped topic