Organic light emitting display apparatus

Patent metadata

Field	Value
Publication number	US-10483336-B2
Application number	US-201815928808-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	May 29, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

An organic light emitting display apparatus includes a substrate; an anode electrode on the substrate; an auxiliary electrode on the substrate; an organic emission layer on the anode electrode; a cathode electrode on the organic emission layer and on the auxiliary electrode; an insulating bank on the auxiliary electrode, the bank overlapping a first portion of the auxiliary electrode and exposing a second portion of the auxiliary electrode; a first partition wall on the auxiliary electrode; a second partition wall on the first partition wall and covering the exposed second portion of the auxiliary electrode in plan view. A separation space is between the second partition wall and the bank, the cathode electrode is electrically connected to the auxiliary electrode through the separation space between the second partition wall and the bank, and the second partition wall is supported by the first partition wall and the bank.

First claim

The invention claimed is:

1. An organic light emitting display apparatus, comprising:
a substrate;
an auxiliary line on the substrate;
an anode electrode on the substrate;
an auxiliary electrode on the substrate;
an organic emission layer on the anode electrode;
a cathode electrode on the organic emission layer and on the auxiliary electrode;
a bank overlapping with a first portion of the auxiliary electrode and exposing a second portion of the auxiliary electrode;
a partition wall on the second portion of the auxiliary electrode; and
a separation space between the partition wall and the bank, the cathode electrode being electrically connected to the auxiliary electrode through the separation space,
wherein the auxiliary line is connected to the second portion of the auxiliary electrode through a contact hole, and
wherein the auxiliary line is disposed between a plurality of the anode electrodes.

2. The organic light emitting display apparatus according to claim 1 , wherein:
the partition wall includes eaves covering the separation space, and
a first portion of the eaves in a first direction is separated from the bank by a certain distance, and a second portion of the eaves in a second direction intersecting the first direction is supported by the bank.

3. The organic light emitting display apparatus according to claim 2 , wherein the partition wall includes:
a first partition wall on the second portion of the auxiliary electrode; and
a second partition wall on the first partition wall to act as the eaves.

4. The organic light emitting display apparatus according to claim 3 , wherein the contact hole which connects the auxiliary electrode to the auxiliary line does not overlap the first partition wall.

5. The organic light emitting display apparatus according to claim 3 , wherein:
a first portion of the first partition wall in the first direction is separated from the bank by the certain distance, and
a second portion of the first partition wall in the second direction is connected to the bank on the auxiliary electrode.

6. The organic light emitting display apparatus according to claim 3 , wherein the first partition wall is on the same layer as the bank.

7. The organic light emitting display apparatus according to claim 5 , wherein the second partition wall in the second direction is supported by the second portion of the first partition wall and the bank.

8. The organic light emitting display apparatus according to claim 5 , wherein a width of a top of the second partition wall is greater than a width of a bottom of the second partition wall on the first partition wall.

9. The organic light emitting display apparatus according to claim 5 , wherein the second portion of the auxiliary electrode is exposed in a region between the second portion of the first partition wall and the bank.

10. The organic light emitting display apparatus of claim 5 , wherein the cathode electrode is connected to the second portion of the auxiliary electrode through the region between the second portion of the first partition wall and the bank.

11. The organic light emitting display apparatus according to claim 2 , wherein the cathode electrode is connected to the second portion of the auxiliary electrode under the first portion of the eaves.

12. The organic light emitting display apparatus according to claim 1 , wherein:
the auxiliary line has a stripe structure wherein a plurality of the auxiliary lines are arranged in one direction, or a mesh structure wherein a plurality of auxiliary lines are arranged in two directions to intersect each other.

13. The organic light emitting display apparatus according to claim 1 , further comprising a thin film transistor on the substrate, the thin film transistor including a source electrode,
wherein the auxiliary line is on the same layer as the source electrode.

14. The organic light emitting display apparatus according to claim 1 , wherein:
the anode electrode includes a first anode electrode and a second anode electrode, the second anode electrode covering a top surface and a side surface of the first anode electrode; and
the auxiliary electrode includes a first auxiliary electrode and a second auxiliary electrode, the second auxiliary electrode covering a top surface and a side surface of the first auxiliary electrode.

15. The organic light emitting display apparatus according to claim 1 , wherein the auxiliary electrode is on the same layer as the anode electrode.

16. The organic light emitting display apparatus according to claim 1 , further comprising
a connection line on the auxiliary line and connected to the auxiliary line, the connection line connected to the auxiliary electrode.

17. The organic light emitting display apparatus according to claim 16 , wherein the connection line is connected to the auxiliary electrode through the contact hole.

18. The organic light emitting display apparatus according to claim 17 , wherein the partition wall includes:
a first partition wall on the second portion of the auxiliary electrode; and
a second partition wall on the first partition wall to act as the eaves,
wherein the contact hole which connects the auxiliary electrode to the auxiliary line does not overlap the first partition wall.

19. The organic light emitting display apparatus according to claim 16 , further comprising a thin film transistor on the substrate, the thin film transistor including a source electrode,
wherein the auxiliary line is on the same layer as the source electrode.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Joonsuk
• Kim Se June

Classifications

• H01L2251/5315

  Electricity · mapped topic

• H01L51/5228

  Electricity · mapped topic

• H01L51/5212

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic