IP Library Granted Patent US 10,153,460
Granted Patent B2
US 10,153,460 · App. 15/671,443 · Granted Dec 11, 2018

Display device

Inventors: Fumito Isaka (Zama, JP); Hisao Ikeda (Zama, JP)
Assignee: Semiconductor Energy Laboratory Co., Ltd.
H01L51/5271G02F1/133602G09G3/3225G09G3/3648H01L27/3232H01L27/3267G09G3/344G09G2300/046G09G2320/0209G09G2320/0242G09G2330/023H01L27/3258H01L51/5209H01L51/5225
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Quick Facts
Patent No.
US 10,153,460
App. No.
15/671,443
Granted
Dec 11, 2018
Kind
B2
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.

Claims (65)

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.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 8, 2017
From: ISAKA, FUMITO; IKEDA, HISAO
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 043229/0035 →
Priority Claims (1)
JP 2016-159845 · Aug 17, 2016 · national
Continuity (1)
Related Publication 20180053917A1 · Feb 22, 2018
Cited By (3)
US 12,598,876 US 12,611,473 US 12,642,131