Organic light emitting display

Patent metadata

Field	Value
Publication number	US-9871090-B2
Application number	US-201615180109-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Oct 15, 2015
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

An organic light emitting display includes a driving transistor, an organic light emitting diode, an interlayer insulating layer, and a connection electrode. The interlayer insulating layer covers the driving transistor, and first and second via holes are formed in the interlayer insulating layer. The organic light emitting diode is on the interlayer insulating layer and connected to the driving transistor. The connection electrode is on the interlayer insulating layer and connected to an auxiliary line through the second via hole. The connection electrode surrounds a portion of the interlayer insulating layer together with the auxiliary line. The organic light emitting diode includes an anode connected to the driving transistor through the first via hole, an organic light emitting layer on the anode, and a cathode on the organic light emitting layer and connected to the auxiliary line through the connection electrode.

First claim

What is claimed is:

1. An organic light emitting display, comprising:
a first base substrate including a light emission area and a non-light emission area;
a driving transistor on the first base substrate;
an interlayer insulating layer covering the driving transistor, and a first via hole and a second via hole defined in the interlayer insulating layer;
an organic light emitting diode on the interlayer insulating layer and connected to the driving transistor, the organic light emitting diode at a location corresponding to the light emission area;
an auxiliary line in the non-light emission area; and
a connection electrode on the interlayer insulating layer and connected to the auxiliary line through the second via hole, the connection electrode surrounding a portion of the interlayer insulating layer corresponding to the non-light emission area together with the auxiliary line, wherein a portion of the interlayer insulating layer is within a closed space defined by the connection electrode and the auxiliary line, and wherein the organic light emitting diode includes an anode connected to the driving transistor through the first via hole, an organic light emitting layer on the anode, and a cathode on the organic light emitting layer and connected to the auxiliary line through the connection electrode.

2. The display as claimed in claim 1 , wherein the connection electrode and the auxiliary line seal a portion of the interlayer insulating layer corresponding to the non-light emission area.

3. The display as claimed in claim 1 , wherein the interlayer insulating layer includes:
a first insulating layer overlapping the organic light emitting diode; and
a second insulating layer overlapping the auxiliary line in the non-light emission area and spaced apart from the first insulating layer, wherein the connection electrode is between the first insulating layer and the second insulating layer.

4. The display as claimed in claim 3 , wherein the connection electrode includes:
a first conductive layer in the second via hole and surrounding the second insulating layer; and
a second conductive layer connected to the first conductive layer and covering the first conductive layer and the second insulating layer.

5. The display as claimed in claim 4 , wherein a size of the second conductive layer is greater than a size of the second insulating layer.

6. The display as claimed in claim 4 , wherein:
the first conductive layer has a ring shape, and
the second conductive layer has a polygonal shape.

7. The display as claimed in claim 4 , wherein:
the first conductive layer has a ring shape, and
the second conductive layer has a circular shape.

8. The display as claimed in claim 4 , wherein:
the first conductive layer covers a side portion of the second insulating layer,
the second conductive layer covers an upper portion of the second insulating layer, and
the auxiliary line covers a lower portion of the second insulating layer.

9. The display as claimed in claim 3 , wherein:
an opening is defined in the organic light emitting layer corresponding to the non-light emission area, the opening overlapping the second insulating layer.

10. The display as claimed in claim 1 , further comprising:
a gate insulating layer on the first base substrate; and
an intermediate insulating layer between the gate insulating layer and the interlayer insulating layer, wherein the driving transistor includes:
a semiconductor pattern;
a gate electrode overlapping the semiconductor pattern, the gate insulating layer interposed between the gate electrode and the semiconductor pattern;
a source electrode on the intermediate insulating layer and connected to the semiconductor pattern; and
a drain electrode on the intermediate insulating layer, connected to the semiconductor pattern, and connected to the anode through the first via hole, wherein the auxiliary line is on the intermediate insulating layer.

11. The display as claimed in claim 10 , wherein the auxiliary line, the source electrode, and the drain electrode include a same material.

12. The display as claimed in claim 10 , wherein the connection electrode and the anode include a same material.

13. The display as claimed in claim 1 , wherein the cathode has a light transmissive property.

14. The display as claimed in claim 1 , wherein the organic light emitting layer emits color light.

15. The display as claimed in claim 1 , further comprising:
a second base substrate facing the first base substrate; and
a color filter on the second base substrate and corresponding to the light emission area, wherein the organic light emitting layer emits white light.

16. An organic light emitting display, comprising:
a base substrate including a light emission area and a non-light emission area;
a driving transistor on the base substrate;
an interlayer insulating layer covering the driving transistor, and a first via hole and a second via hole defined in the interlayer insulating layer;
an organic light emitting diode on the interlayer insulating layer and corresponding to the light emission area, the organic light emitting diode connected to the driving transistor;
an auxiliary line in the non-light emission area; and
a connection electrode on the interlayer insulating layer and connecting the organic light emitting diode to the auxiliary line through the second via hole, wherein the interlayer insulating layer includes:
a first insulating layer overlapping the organic light emitting diode; and
a second insulating layer overlapping the auxiliary line in the non-light emission area and having an island shape isolated from the first insulating layer, the second insulating layer disposed within a closed space defined by the connection electrode and the auxiliary line.

17. The display as claimed in claim 16 , wherein the connection electrode includes:
a first conductive layer in the second via hole and surrounding the second insulating layer; and
a second conductive layer connected to the first conductive layer and covering the first conductive layer and the second insulating layer.

18. The display as claimed in claim 17 , wherein the first conductive layer, the second conductive layer, and the auxiliary line seal the second insulating layer.

19. The display as claimed in claim 17 , wherein:
the first conductive layer covers a side portion of the second insulating layer,
the second conductive layer covers an upper portion of the second insulating layer, and
the auxiliary line covers a lower portion of the second insulating layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Seho
• Kim Taehyung
• Song Je-Hyun

Classifications

• H01L27/3248

  Electricity · mapped topic

• H01L51/5234

  Electricity · mapped topic

• H01L51/5228

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic

• H01L27/3276 Primary

  Electricity · mapped topic