Organic light emitting diode display having barrier layer on auxiliary electrode

Patent metadata

Field	Value
Publication number	US-10566407-B2
Application number	US-201816181791-A
Country	US
Kind code	B2
Filing date	Nov 6, 2018
Priority date	Nov 7, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

An organic light emitting diode display is disclosed. The organic light emitting diode display includes a first substrate including an organic light emitting diode, a second substrate including a power line supplied with a power voltage and facing the first substrate, and a conductive filler layer between the first substrate and the second substrate. The first substrate includes an auxiliary electrode, a first barrier on the auxiliary electrode, a cathode physically divided by the first barrier and exposing at least a portion of the auxiliary electrode, a contact electrode disposed on the cathode, physically divided by the first barrier, and exposing at least a portion of the auxiliary electrode, and a protective layer between the cathode and the contact electrode. One end of the cathode directly contacts the auxiliary electrode, and one end of the contact electrode directly contacts the auxiliary electrode.

First claim

What is claimed is:

1. An organic light emitting diode display, comprising:
a first substrate including an organic light emitting diode;
a second substrate including a power line supplied with a power voltage, the second substrate facing the first substrate; and
a conductive filler layer interposed between the first substrate and the second substrate, the conductive filler layer including a conductive medium,
wherein the first substrate includes:
an auxiliary electrode;
a first barrier disposed on the auxiliary electrode;
a cathode included in the organic light emitting diode and physically divided by the first barrier, the cathode exposing at least a portion of the auxiliary electrode, one end of the cathode directly contacting the auxiliary electrode;
a contact electrode disposed on the cathode and physically divided by the first barrier, the contact electrode exposing at least a portion of the auxiliary electrode, one end of the contact electrode directly contacting the auxiliary electrode; and
a protective layer interposed between the cathode and the contact electrode.

2. The organic light emitting diode display of claim 1 , wherein the contact electrode directly contacts the conductive filler layer and is electrically connected to the cathode through the auxiliary electrode.

3. The organic light emitting diode display of claim 1 , wherein the protective layer on the cathode exposes at least a portion of one end of the cathode,
wherein the contact electrode on the protective layer directly contacts the exposed portion of the cathode.

4. The organic light emitting diode display of claim 1 , wherein the cathode and the contact electrode are spaced from each other with the protective layer interposed therebetween.

5. The organic light emitting diode display of claim 1 , wherein the conductive filler layer directly contacts the exposed portion of the auxiliary electrode.

6. The organic light emitting diode display of claim 1 , further comprising:
a sealant disposed at an edge of the first substrate and an edge of the second substrate, the conductive filler layer being accommodated inside the sealant; and
a power electrode disposed on the first substrate and inside the sealant, the power electrode receiving the power voltage from a power generator,
wherein at least a portion of the power electrode directly contacts the conductive filler layer, and
wherein the power electrode is electrically connected to the power line through the conductive filler layer.

7. The organic light emitting diode display of claim 1 , further comprising:
a sealant disposed at an edge of the first substrate and an edge of the second substrate, the conductive filler layer being accommodated inside the sealant;
a power electrode disposed on the first substrate and inside the sealant, the power electrode receiving the power voltage from a power generator; and
a second barrier disposed on the power electrode,
wherein the cathode is divided by the second barrier and exposes at least a portion of the power electrode,
wherein the protective layer is divided by the second barrier and exposes at least a portion of the power electrode,
wherein the contact electrode is divided by the second barrier and exposes at least a portion of the power electrode,
wherein the power electrode is electrically connected to an exposed portion of the power line through the conductive filler layer.

8. The organic light emitting diode display of claim 7 , wherein one end of the cathode directly contacts the power electrode,
wherein one end of the contact electrode directly contacts the power electrode.

9. The organic light emitting diode display of claim 1 , wherein the second substrate further includes color filters,
wherein the color filters are partitioned by the power line.

10. The organic light emitting diode display of claim 1 , wherein the first substrate further includes color filters respectively assigned to pixels,
wherein the color filters are disposed on the contact electrode.

11. The organic light emitting diode display of claim 1 , wherein the first substrate further includes color filters respectively assigned to pixels,
wherein the color filters are interposed between the cathode and the protective layer.

12. The organic light emitting diode display of claim 1 , wherein the first substrate further includes color filters respectively assigned to pixels,
wherein the color filters are interposed between the protective layer and the contact electrode.

13. The organic light emitting diode display of claim 1 , wherein each of the first substrate and the second substrate includes an emission region, to which light from the organic light emitting diode is emitted, and a non-emission region outside the emission region,
wherein the power line is disposed in the non-emission region.

14. The organic light emitting diode display of claim 13 , wherein the second substrate further includes an auxiliary power line, of which at least a portion of one surface directly contacts the power line, and another surface opposite the one surface directly contacts the conductive filler layer.

15. The organic light emitting diode display of claim 14 , wherein the auxiliary power line has an area larger than the power line.

16. The organic light emitting diode display of claim 14 , wherein the auxiliary power line includes a transparent conductive material.

17. An organic light emitting diode display comprising:
a first substrate including an organic light emitting diode;
a second substrate including a power line supplied with a power voltage, the second substrate facing the first substrate; and
a conductive filler layer interposed between the first substrate and the second substrate, the conductive filler layer including a conductive medium,
wherein the first substrate includes:
an auxiliary electrode;
a first barrier disposed on the auxiliary electrode;
a cathode included in the organic light emitting diode, the cathode comprising a first portion covering an upper surface of the first barrier and a second portion disconnecting with the first portion and not covering the first barrier, the cathode exposing at least a portion of the auxiliary electrode, wherein the second portion of the cathode extends such that one end thereof directly contacts the exposed portion of the auxiliary electrode;
a contact electrode disposed on the first portion and the second portion of the cathode, respectively, to form a first portion and a second portion of the contact electrode, the contact electrode exposing at least a portion of the auxiliary electrode, wherein the second portion of the contact electrode extends such that one end thereof directly contacts the exposed portion of the auxiliary electrode; and
a protective layer interposed between the cathode and the contact electrode.

18. The organic light emitting diode display of item 17 , further comprising:
a sealant disposed at an edge of the first substrate and an edge of the second substrate, the conductive filler layer being accommodated inside the sealant;
a power electrode disposed on the first substrate and inside the sealant, the power electrode receiving the power voltage from a power generator; and
a second barrier disposed on the power electrode,
wherein the second portion of the cathode is further divided by the second barrier to form a third portion covering an upper surface of the second barrier and a forth portion disconnecting with the third portion and not covering the second barrier, the cathode exposing at leas

Assignees

• Lg Display Co Ltd

Inventors

• Lee Joonsuk
• Kim Sejune
• Lee Jaesung

Classifications

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G3/3291

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• H01L51/5253

  Electricity · mapped topic

• H01L51/5246

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic