IP Library › Granted Patent US 11,871,600
Granted Patent B2
US 11,871,600 · App. 17/581,064 · Granted Jan 9, 2024

Display device

Inventors: Kenichi Okazaki (Tochigi, JP); Shingo Eguchi (Kanagawa, JP); Hiroki Adachi (Tochigi, JP)
H10K50/822H10K50/13H10K2102/341
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Quick Facts
Patent No.
US 11,871,600
App. No.
17/581,064
Granted
Jan 9, 2024
Kind
B2
Abstract

A display device with high display quality is provided. The display device includes a first lower electrode, a first EL layer over the first lower electrode, a second lower electrode, a second EL layer over the second lower electrode, an upper electrode over the first EL layer and the second EL layer, a first region not provided with the first lower electrode below the first EL layer, and a second region not provided with the second lower electrode below the second EL layer. In the first region, the upper electrode is positioned not to be in contact with the first lower electrode. In the second region, the upper electrode is positioned not to be in contact with the second lower electrode.

Claims (27)

1. A display device comprising:

a first lower electrode;

a first EL layer over the first lower electrode;

a second lower electrode;

a second EL layer over the second lower electrode;

an upper electrode over the first EL layer and the second EL layer;

a first region below the first EL layer; and

a second region below the second EL layer,

wherein in the first region, the first lower electrode is not provided, and the upper electrode is positioned not to be in contact with the first lower electrode, and

wherein in the second region, the second lower electrode is not provided, and the upper electrode is positioned not to be in contact with the second lower electrode.

2. The display device according to claim 1 , wherein the upper electrode comprises a region overlapping with the first EL layer in the first region.

3. The display device according to claim 1 , further comprising a common layer between the first EL layer and the upper electrode and between the second EL layer and the upper electrode.

4. A display device comprising:

a first lower electrode;

a first EL layer over the first lower electrode;

a second lower electrode;

a second EL layer over the second lower electrode; and

an upper electrode over the first EL layer and the second EL layer,

wherein the upper electrode is positioned to be apart from the first lower electrode in a first region below the first EL layer, and

wherein the upper electrode is positioned to be apart from the second lower electrode in a second region below the second EL layer.

5. A display device comprising:

a lower electrode;

an EL layer over the lower electrode; and

an upper electrode over the EL layer,

wherein the upper electrode is positioned to be apart from the lower electrode in a region below the EL layer.

6. The display device according to claim 4 , wherein the upper electrode comprises a region overlapping with the first EL layer in the first region.

7. The display device according to claim 4 , further comprising a common layer between the first EL layer and the upper electrode and between the second EL layer and the upper electrode.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 21, 2022
From: OKAZAKI, KENICHI; EGUCHI, SHINGO; ADACHI, HIROKI
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 058723/0853 →
Priority Claims (1)
JP 2021-011450 · Jan 27, 2021 · national
Continuity (1)
Related Publication 20220238836A1 · Jul 28, 2022