IP Library Granted Patent US 9,741,775
Granted Patent B2
US 9,741,775 · App. 15/139,426 · Granted Aug 22, 2017

Display device

Inventors: Shigeru Sakamoto (Tokyo, JP); Masakazu Gunji (Tokyo, JP); Toshihiro Sato (Tokyo, JP)
Assignee: Japan Display Inc.
H01L27/3246H01L51/5209
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Quick Facts
Patent No.
US 9,741,775
App. No.
15/139,426
Granted
Aug 22, 2017
Kind
B2
Abstract

A display device includes a plurality of pixels on a substrate including an insulating surface. Each of the plurality of pixels includes: a transistor above the insulating surface; a planarization film covering the transistor; a pixel electrode above the planarization film and electrically connected with the transistor; an insulating layer filled in a recess located around the pixel electrode between the pixels adjacent to each other; a light-emitting layer covering a surface of the pixel electrode and at least a part of a surface of the insulating layer; and a counter electrode above the light-emitting layer. A distance between a surface of the substrate and a face of the light-emitting layer in contact with the insulating layer is equal to or smaller than a distance between the surface of the substrate and a face of the light-emitting layer in contact with the pixel electrode.

Claims (60)

1. A display device comprising:

a plurality of pixels on a substrate including an insulating surface,

each of the plurality of pixels including:

a transistor above the insulating surface;

a planarization film covering the transistor;

a pixel electrode above the planarization film and electrically connected with the transistor;

a bank layer above the planarization film and below the pixel electrode;

an insulating layer in a recess located around the pixel electrode between the pixels adjacent to each other;

a light-emitting layer covering a surface of the pixel electrode and at least a part of a surface of the insulating layer; and

a counter electrode above the light-emitting layer, wherein

the bank layer includes a top surface and a side surface,

the pixel electrode covers the top surface and at least a part of the side surface of the bank layer,

the recess is surrounded by the side surface of the bank layer, and

a distance between a surface of the substrate and a face of the light-emitting layer in contact with the insulating layer is equal to or smaller than a distance between the surface of the substrate and a face of the light-emitting layer in contact with the pixel electrode.

2. The display device according to claim 1 , wherein

the pixel electrode has a shape, in a cross-sectional view, in which a central portion thereof is swelled relative to an edge portion thereof.

3. The display device according to claim 1 , wherein the face of the light-emitting layer in contact with the pixel electrode overlaps the transistor in plan view.

4. The display device according to claim 1 , wherein

the light-emitting layer is on a plane spreading from the surface of the pixel electrode to the surface of the insulating layer.

5. The display device according to claim 1 , wherein

the light-emitting layer is formed such that a region overlapping the insulating layer is depressed beyond a region overlapping the pixel electrode.

6. The display device according to claim 1 , wherein

the pixel electrode includes a top surface and a side surface, and

the recess is surrounded by the side surface of the pixel electrode.

7. The display device according to claim 1 , wherein

the insulating layer has a light-shielding capability.

8. The display device according to claim 1 , further comprising a counter substrate including a color filter layer corresponding to the plurality of pixels, wherein

the substrate and the counter substrate interpose the pixel electrode, the light-emitting layer and the counter electrode therebetween, and face each other via a filling material between the counter electrode and the counter substrate.

9. The display device according to claim 1 , further comprising:

a sealing film above the counter electrode; and

a color filter above the sealing film and corresponding to the plurality of pixels.

10. A display device comprising:

a plurality of pixels on a substrate including an insulating surface,

each of the plurality of pixels including:

a transistor above the insulating surface;

a planarization film covering the transistor;

a pixel electrode above the planarization film and electrically connected with the transistor;

a bank layer above the planarization film and below the pixel electrode;

an insulating layer in a recess located around the pixel electrode between the pixels adjacent to each other;

a light-emitting layer covering a surface of the pixel electrode and at least a part of a surface of the insulating layer; and

a counter electrode above the light-emitting layer, wherein

the bank layer includes a top surface and a side surface,

the pixel electrode covers the top surface and at least a part of the side surface of the bank layer, and

the recess is surrounded by the side surface of the bank layer.

11. The display device according to claim 10 , wherein

the pixel electrode has a shape, in a cross-sectional view, in which a central portion thereof is swelled relative to an edge portion thereof.

12. The display device according to claim 10 , wherein

the face of the light-emitting layer in contact with the pixel electrode overlaps the transistor in plan view.

13. The display device according to claim 10 , wherein

the light-emitting layer is on a plane spreading from the surface of the pixel electrode to the surface of the insulating layer.

14. The display device according to claim 10 , wherein

the light-emitting layer is formed such that a region overlapping the insulating layer is depressed beyond a region overlapping the pixel electrode.

15. The display device according to claim 10 , wherein the pixel electrode includes a top surface and a side surface, and the recess is surrounded by the side surface of the pixel electrode.

16. The display device according to claim 10 , wherein

the insulating layer has a light-shielding capability.

17. The display device according to claim 10 , further comprising a counter substrate including a color filter layer corresponding to the plurality of pixels, wherein

the substrate and the counter substrate interpose the pixel electrode, the light-emitting layer and the counter electrode therebetween, and face each other via a filling material between the counter electrode and the counter substrate.

18. The display device according to claim 10 , further comprising:

a sealing film above the counter electrode; and

a color filter above the sealing film and corresponding to the plurality of pixels.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2025
From: JAPAN DISPLAY INC.
To: MAGNOLIA WHITE CORPORATION
Reel/Frame 072130/0313 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 27, 2016
From: SAKAMOTO, SHIGERU; GUNJI, MASAKAZU; SATO, TOSHIHIRO
To: JAPAN DISPLAY INC.
Reel/Frame 038390/0832 →
Priority Claims (1)
JP 2015-092927 · Apr 30, 2015 · national
Continuity (1)
Related Publication 20160322437A1 · Nov 3, 2016