Electroluminescence display device

Patent metadata

Field	Value
Publication number	US-10629663-B2
Application number	US-201816208954-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Dec 7, 2017
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

An electroluminescence display apparatus includes: a substrate including: an active area, and a dummy area, a bank on the substrate, the bank being configured to define: a plurality of emission areas in the active area, and a plurality of dummy emission areas in the dummy area, a light-emitting layer in each of the plurality of emission areas, and a dummy light-emitting layer in each of the plurality of dummy emission areas, a thickness of the dummy light-emitting layer being greater than a thickness of the light-emitting layer.

First claim

What is claimed is:

1. An electroluminescence display apparatus, comprising:
a substrate comprising:
an active area; and
a dummy area;

a bank on the substrate, the bank being configured to define:
a plurality of emission areas in the active area; and
a plurality of dummy emission areas in the dummy area;

a light-emitting layer in each of the plurality of emission areas; and
a dummy light-emitting layer in each of the plurality of dummy emission areas, a thickness of the dummy light-emitting layer being greater than a thickness of the light-emitting layer.

2. The electroluminescence display apparatus of claim 1 , wherein:
the light-emitting layer comprises:
a first pixel comprising a first light-emitting layer;
a second pixel comprising a second light-emitting layer; and
a third pixel comprising a third light-emitting layer; and

the dummy light-emitting layer comprises a stacked structure comprising at least two of: the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer.

3. The electroluminescence display apparatus of claim 1 , wherein:
the light-emitting layer comprises:
a first pixel comprising a first light-emitting layer;
a second pixel comprising a second light-emitting layer; and
a third pixel comprising a third light-emitting layer; and

the dummy light-emitting layer comprises one of: the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer.

4. The electroluminescence display apparatus of claim 1 , further comprising a first electrode below the dummy light-emitting layer, the first electrode being electrically isolated from the dummy light-emitting layer.

5. The electroluminescence display apparatus of claim 1 , further comprising:
a first electrode below the dummy light-emitting layer,
wherein the bank is additionally between the dummy light-emitting layer and the first electrode.

6. The electroluminescence display apparatus of claim 1 , wherein the bank in the dummy area has a structure different from that of the bank in the active area.

7. The electroluminescence display apparatus of claim 1 , wherein the bank in the dummy area comprises:
a first portion defining the plurality of dummy emission areas; and
a second portion having a thickness smaller than that of the first portion, the second portion being in the plurality of dummy emission areas.

8. The electroluminescence display apparatus of claim 7 , wherein the second portion contacts a lower surface of the dummy light-emitting layer.

9. The electroluminescence display apparatus of claim 1 , wherein:
the bank comprises:
a first bank; and
a second bank on the first bank, the second bank having a width smaller than that of the first bank and a thickness greater than that of the first bank.

10. The electroluminescence display apparatus of claim 9 , wherein:
the first bank in the dummy area is in the plurality of dummy emission areas; and
a lower surface of the dummy light-emitting layer contacts the first bank.

11. The electroluminescence display apparatus of claim 1 , further comprising a circuit element layer between the substrate and the bank, the circuit element layer having the same structure in the active area and the dummy area.

12. The electroluminescence display apparatus of claim 1 , wherein a thickness of the dummy light-emitting layer is within a range of 1.5 to 3 times a thickness of the light-emitting layer.

13. An electroluminescence display apparatus, comprising:
a substrate comprising:
an active area; and
a dummy area;

a bank on the substrate and configured to define:
a plurality of emission areas in the active area; and
a plurality of dummy emission areas in the dummy area;

a dummy light-emitting layer in each of the plurality of dummy emission areas;
a first electrode below the dummy light-emitting layer; and
a second electrode above the dummy light-emitting layer,
wherein the dummy light-emitting layer has a thickness such that no light emission occurs by an electric field between the first electrode and the second electrode.

14. The electroluminescence display apparatus of claim 13 , wherein:
the active area comprises:
a first pixel comprising a first light-emitting layer;
a second pixel comprising a second light-emitting layer; and
a third pixel comprising a third light-emitting layer; and

the dummy light-emitting layer has a stacked structure comprising at least two of: the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer.

15. The electroluminescence display apparatus of claim 13 , wherein:
the active area comprises:
a first pixel comprising a first light-emitting layer;
a second pixel comprising a second light-emitting layer; and
a third pixel comprising a third light-emitting layer; and

the dummy light-emitting layer comprises one of: the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer.

16. The electroluminescence display apparatus of claim 13 , wherein the dummy light-emitting layer and the first electrode are not in contact with each other.

17. The electroluminescence display apparatus of claim 16 , wherein the bank is additionally between the dummy light-emitting layer and the first electrode.

18. The electroluminescence display apparatus of claim 13 , further comprising:
a light-emitting layer in the plurality of emission areas,
wherein a thickness of the dummy light-emitting layer is within a range of 1.5 to 3 times a thickness of the light-emitting layer.

Assignees

• Lg Display Co Ltd

Inventors

• Jung Nackyoun
• Lee Sangbin
• Choi Jeongmook

Classifications

• H01L27/3223

  Electricity · mapped topic

• H01L51/5225

  Electricity · mapped topic

• H01L51/5012

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic