Organic light-emitting display apparatus having bi-directional light emission and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9245934-B2
Application number	US-201414336550-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	Aug 16, 2013
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

An organic light-emitting display apparatus includes a plurality of pixels, a plurality of first electrodes, a plurality of second electrodes, an intermediate layer, a third electrode, an auxiliary layer, and a fourth electrode. Each pixel includes a first region that emits light in a first direction and a second region that emits light in a second direction that is opposite to the first direction. The first electrodes are respectively located in the first region of each of the pixels. The second electrodes are respectively located in the second region of each of the plurality of pixels. The intermediate layer is on the plurality of first electrodes and the plurality of second electrodes, and includes an organic emission layer. The third electrode is on the intermediate layer and in the first and second regions. The fourth electrode is in the first region and contacts the third electrode.

First claim

What is claimed is:

1. An organic light-emitting display apparatus, comprising:
a plurality of pixels, each pixel including a first region that emits light in a first direction and a second region that emits light in a second direction that is opposite to the first direction;
a plurality of first electrodes respectively located in the first region of each of the plurality of pixels;
a plurality of second electrodes respectively located in the second region of each of the plurality of pixels;
an intermediate layer on the plurality of first electrodes and the plurality of second electrodes and including an organic emission layer;
a third electrode on the intermediate layer and disposed in the first region and the second region;
an auxiliary layer in the second region and not disposed in the first region; and
a fourth electrode in the first region and contacting the third electrode,
wherein the auxiliary layer and the fourth electrode are on a same side of the third electrode.

2. The organic light-emitting display apparatus as claimed in claim 1 , wherein the fourth electrode is not in the second region.

3. The organic light-emitting display apparatus as claimed in claim 1 , wherein the fourth electrode is also in the second region, and a thickness of a portion of the fourth electrode in the second region is thinner than that of a portion of the fourth electrode in the first region.

4. The organic light-emitting display apparatus as claimed in claim 3 , wherein the portion of the fourth electrode in the second region is on the auxiliary layer.

5. The organic light-emitting display apparatus as claimed in claim 1 , wherein each of the plurality of pixels further includes a third region in which at least a wiring electrically connected to at least one of the first electrode and the second electrode is located,
the auxiliary layer is not in the third region, and
the fourth electrode is also in the third region.

6. The organic light-emitting display apparatus as claimed in claim 1 , wherein each of the plurality of pixels further includes a third region in which at least a wiring electrically connected to at least one of the first electrode and the second electrode is located, and
the auxiliary layer is also in the third region.

7. The organic light-emitting display apparatus as claimed in claim 6 , wherein the fourth electrode is also in the second region and the third region, and thicknesses of portions of the fourth electrode in the second region and the third region are thinner than that of a portion of the fourth electrode in the first region.

8. The organic light-emitting display apparatus as claimed in claim 7 , wherein the portions of the fourth electrode in the second region and the third region are on the auxiliary layer.

9. The organic light-emitting display apparatus as claimed in claim 1 , wherein each of the plurality of pixels further includes a fourth region through which external light transmits in the thickness direction of the organic light-emitting display apparatus, and
the auxiliary layer is also in the fourth region.

10. The organic light-emitting display apparatus as claimed in claim 9 , wherein the fourth electrode is not in the fourth region.

11. The organic light-emitting display apparatus as claimed in claim 9 , wherein the fourth electrode is also in the second region and the fourth region, and thicknesses of portions of the fourth electrode in the second region and the fourth region are thinner than that of the portion of the fourth electrode in the first region.

12. The organic light-emitting display apparatus as claimed in claim 11 , wherein the portions of the fourth electrode in the second region and the fourth region are on the auxiliary layer.

13. The organic light-emitting display apparatus as claimed in claim 1 , wherein a thickness of the fourth electrode is thicker than that of the third electrode.

14. The organic light-emitting display apparatus as claimed in claim 1 , wherein an adhesive force of the fourth electrode to the third electrode is stronger than that to the auxiliary layer.

15. The organic light-emitting display apparatus as claimed in claim 1 , wherein the auxiliary layer includes N,N′-diphenyl-N,N′-bis(9-phenyl-9H-carbazol-3-yl)biphenyl-4,4′-diamine, N(diphenyl-4-yl)9,9-dimethyl-N-(4(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluorene-2-amine, 2-(4-(9,10-di(naphthalene-2-yl)anthracene-2-yl)phenyl)-1-phenyl-1H-benzo-[D]imidazole, m-MTDATA[4,4,4-tris(3-methylphenylphenylamino)triphenylamine], α-NPD(N,N′-bis(1-naphthyl)-N,N′-diphenyl[1,1′-biphenyl]-4,4′-diamine), or TPD[4,4′-Bis[N-(3-methylphenyl)-N-phenylamino]biphenyl].

16. The organic light-emitting display apparatus as claimed in claim 1 , wherein the fourth electrode includes magnesium (Mg).

17. A method of manufacturing an organic light-emitting display apparatus, the method comprising:
defining a plurality of pixels, each pixel including a first region that emits light in a first direction and a second region that emits light in a second direction that is opposite to the first direction;
forming a plurality of first electrodes respectively located in the first region of each of the plurality of pixels;
forming a plurality of second electrodes respectively located in the second region of each of the plurality of pixels;
forming an intermediate layer that is on the plurality of first electrodes and the plurality of second electrodes and includes an organic emission layer;
forming a third electrode on the intermediate layer in the first region and the second region by depositing a first metal on the intermediate layer;
forming an auxiliary layer on the third electrode in the second region and not to be in the first region; and
forming a fourth electrode on the third electrode in the first region and contacting the third electrode by depositing a second metal on the third electrode,
wherein the auxiliary layer and the fourth electrode are on a same side of the third electrode.

18. The method as claimed in claim 17 , wherein forming the fourth electrode includes depositing the second metal in the first region and the second region simultaneously so that the fourth electrode is not in the second region.

19. The method as claimed in claim 17 , wherein forming the fourth electrode includes depositing the second metal in the first region and the second region simultaneously so that the fourth electrode is also in the second region, and a thickness of a portion of the fourth electrode in the second region is thinner than that of a portion of the fourth electrode in the first region.

20. The method as claimed in claim 19 , wherein forming the fourth electrode includes forming the fourth electrode on the auxiliary layer at least in the second region.

21. The method as claimed in claim 17 , wherein each of the plurality of pixels further includes a third region in which at least a wiring electrically connected to at least one of the first electrode and the second electrode is located,
forming the auxiliary layer includes forming the auxiliary layer not to be in the third region, and
forming the fourth electrode includes depositing the second metal in the first region and the third region simultaneously so that the fourth electrode is in the third region.

22. The method as claimed in claim 17 , wherein each of the plurality of pixels further includes a third region in which at least a wiring electrically connected to at least one of the first electrode and the second elect

Assignees

• Samsung Display Co Ltd

Inventors

• Chung Jin-Koo
• Yim Sang-Hoon
• Choi Jun-Ho
• Kim Kyung-Ho
• Kim Seong-Min
• Cho Kwan-Hyun

Classifications

• H10K59/805 Primary

  Electrodes · CPC title

• H01L27/326 Primary

  Electricity · mapped topic

• H01L51/5056

  Electricity · mapped topic

• H01L51/5221

  Electricity · mapped topic

• H01L51/5206

  Electricity · mapped topic