Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-9954039-B2
Application number	US-201615360233-A
Country	US
Kind code	B2
Filing date	Nov 23, 2016
Priority date	Dec 15, 2015
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

An organic light emitting display device can include a substrate; an anode electrode on the substrate; an organic emitting layer on the anode electrode; a cathode electrode on the organic emitting layer; an auxiliary electrode connected to the cathode electrode; a bank provided on either side of the auxiliary electrode; and a partition spaced apart from the bank and provided on the auxiliary electrode, in which the partition includes a plurality of first partitions provided on the auxiliary electrode and spaced apart from each other, and the partition further includes a second partition provided on the plurality of first partitions, and a width of an upper surface of the second partition is larger than a width of a lower surface of the second partition.

First claim

What is claimed is:

1. An organic light emitting display (OLED) device comprising:
a substrate;
an anode electrode provided on the substrate;
an organic emitting layer provided on the anode electrode;
a cathode electrode provided on the organic emitting layer;
an auxiliary electrode connected to the cathode electrode;
a bank provided on either side of the auxiliary electrode; and
a partition spaced apart from the bank and provided on the auxiliary electrode,
wherein the partition includes a plurality of first partitions provided on the auxiliary electrode and spaced apart from each other,
wherein the partition further includes a second partition provided on the plurality of first partitions,
wherein a width of an upper surface of the second partition is larger than a width of a lower surface of the second partition, and
wherein the plurality of first partitions are disposed between the second partition and the auxiliary electrode, and each of the plurality of first partitions has a second width in a first direction that is longer than a first width of the second partition in the first direction.

2. The OLED device according to claim 1 , wherein the second partition overlaps areas between each of the plurality of first partitions, and the cathode electrode contacts the auxiliary electrode in the areas between each of the plurality of first partitions.

3. The OLED device according to claim 1 , wherein a plurality of pixels are provided on the substrate, and
wherein each pixel includes a light emitting part and a light transmitting part, and the partition is provided in a boundary area between each of the plurality of pixels.

4. The OLED device according to claim 1 , wherein the anode electrode includes a first anode electrode, and a second anode electrode connected with the first anode electrode via a contact hole,
wherein the auxiliary electrode includes a first auxiliary electrode, and a second auxiliary electrode connected with the first auxiliary electrode via a contact hole, and
wherein the bank and the partition are provided on the second auxiliary electrode.

5. The OLED device according to claim 4 , wherein a plurality of pixels are provided on the substrate,
wherein each pixel includes a light emitting part and a light transmitting part, and
wherein the first auxiliary electrode extends to a boundary area between each of the plurality of pixels in the light emitting part, and the second auxiliary electrode is provided in the boundary area between each of the plurality of pixels.

6. The OLED device according to claim 4 , wherein a width of the first auxiliary electrode is larger than a width of the first anode electrode, and the first auxiliary electrode overlaps with the second anode electrode.

7. The OLED device according to claim 1 , wherein a length of the second partition is larger than a total length of the plurality of first partitions combined with lengths of intervals between each of the plurality of first partitions.

8. The OLED device according to claim 1 , wherein the first partition and the bank are formed of the same material.

9. The OLED device according to claim 1 , wherein the second partition has a reverse tapered shape that narrows towards a bottom surface of the second partition, and
wherein the bottom surface of the second partition contacts at least two of the plurality of first partitions.

10. The OLED device according to claim 1 , wherein the plurality of first partitions are disposed in parallel along a line under the second partition.

11. The OLED device according to claim 1 , wherein the auxiliary electrode is connected to the cathode electrode in a gap space between the partition and the bank.

12. The OLED device according to claim 1 , wherein the auxiliary electrode is connected to the cathode electrode in a space between at least two of the plurality of first partitions.

13. The OLED device according to claim 1 , wherein the auxiliary electrode comprises a first auxiliary electrode and a second auxiliary electrode, and the second auxiliary electrode overlaps with and connects to the first auxiliary electrode.

14. The OLED device according to claim 13 , wherein the first auxiliary electrode or the second auxiliary electrode comprises a layered structure including a central auxiliary electrode disposed between an upper auxiliary electrode and a lower auxiliary electrode, and
wherein the upper and lower auxiliary electrodes include a material having a higher corrosion resistance than the central auxiliary electrode, and the central auxiliary electrode includes a material having a lower electrical resistance than the upper and lower auxiliary electrodes.

15. The OLED device according to claim 14 , wherein the upper auxiliary electrode of the first auxiliary electrode covers lateral surfaces of the central and lower auxiliary electrodes of the first auxiliary electrode.

16. The OLED device according to claim 1 , wherein the auxiliary electrode comprises a first auxiliary electrode and a second auxiliary electrode, the second auxiliary electrode overlaps with and connects to the first auxiliary electrode,
wherein the anode electrode comprises a first anode electrode and a second anode electrode, the second anode electrode overlaps with and connects to the first auxiliary electrode, and
wherein the first or second anode electrode is formed on a same layer as the first or second auxiliary electrode.

17. An organic light emitting display (OLED) device comprising:
an organic emitting layer disposed on a first pixel electrode;
a second pixel electrode disposed on the organic emitting layer;
an auxiliary electrode disposed between a first bank portion and a second bank portion;
a partition disposed on the auxiliary electrode and between the first and second bank portions, wherein the partition comprises a second partition disposed on a plurality of first partitions; and
a gap space between the partition and the first or second bank portion,
wherein the auxiliary electrode connects to the second pixel electrode in the gap space between the partition and the first or second bank portion, and
wherein the plurality of first partitions are disposed between the second partition and the auxiliary electrode, and each of the plurality of first partitions has a second width in a first direction that is longer than a first width of the second partition in the first direction.

18. The OLED device according to claim 1 , wherein the auxiliary electrode is connected to the second pixel electrode in a space between the at least two of the plurality of first partitions.

19. The OLED device according to claim 1 , wherein the second partition has a reverse tapered shape that narrows towards a bottom surface of the second partition, and
wherein the bottom surface of the second partition contacts at least two of the plurality of first partitions.

Assignees

• Lg Display Co Ltd

Inventors

• Im Jonghyeok
• Kim Eunah

Classifications

• H01L51/5228

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L51/5212

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic