Method of manufacturing connection structure connecting cathode electrode to auxiliary cathode electrode and organic light-emitting diode display device using the same

Patent metadata

Field	Value
Publication number	US-10056036-B2
Application number	US-201615226030-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	May 12, 2016
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

An organic light-emitting diode display device having an organic light-emitting diode having an anode electrode, an organic emission layer, and a cathode electrode is provided. The organic light-emitting diode display device includes a low potential source line configured to supply a low potential source voltage; and at least one auxiliary cathode electrode configured to connect the low potential source line to the cathode electrode. The at least one auxiliary cathode electrode includes a first electrode layer connected to the low potential source line, and a second electrode layer connected to the first electrode layer at a plurality of first positions and connected to the cathode electrode at a plurality of second positions different from the plurality of first positions.

First claim

What is claimed is:

1. An organic light-emitting diode display device comprising an organic light-emitting diode having an anode electrode, an organic emission layer, and a cathode electrode, the organic light-emitting diode display device comprising:
a low potential source line configured to supply a low potential source voltage;
at least one auxiliary cathode electrode configured to connect the low potential source line to the cathode electrode; and
a first link pattern configured to be connected to the low potential source line,
wherein the at least one auxiliary cathode electrode includes a first electrode layer connected to the first link pattern, and a second electrode layer connected to the first electrode layer at a plurality of first positions and connected to the cathode electrode at a plurality of second positions different from the plurality of first positions.

2. The organic light-emitting diode display device of claim 1 , further comprising a second link pattern connected to another end of the at least one auxiliary cathode electrode and disposed in parallel to the first link pattern disposed to intersect the at least one auxiliary cathode electrode.

3. The organic light-emitting diode display device of claim 2 , further comprising at least one third link pattern configured to connect the first link pattern to the second link pattern.

4. The organic light-emitting diode display device of claim 1 , further comprising pixel regions partitioned by gate lines and data lines crossing each other,
wherein, in a region in which the cathode electrode and the auxiliary cathode electrode are connected,
the first metal layer of the auxiliary cathode electrode is disposed on a gate insulating film covering the gate line,
a planarization layer having an opening portion exposing the first metal layer at the plurality of first positions is disposed on the first metal layer,
a second metal layer is disposed on the planarization layer and connected to the first metal layer at the plurality of first positions,
a residual organic emission layer is disposed at positions of the second metal layer corresponding to the plurality of first positions, and
the cathode electrode is disposed on the residual organic emission layer and the second metal layer, and connected to the second metal layer at the plurality of second positions.

5. The organic light-emitting diode display device of claim 4 , wherein:
the first link pattern is disposed on the same layer as the gate line and made of the same material as the gate line, and
the low potential source line is disposed on the gate insulating layer and made of with the same material as the data line.

6. The organic light-emitting diode display device of claim 5 , wherein the low potential source line is connected to the first link pattern exposed through a contract hole penetrating the gate insulating layer in a non-display region.

7. The organic light-emitting diode display device of claim 6 , wherein the cathode electrode is connected to the low potential source line through a contract hole through which the low potential source line is exposed in the non-display region.

8. The organic light-emitting diode display device of claim 6 , wherein:
the anode electrode and the second metal layer are made of a transparent conductive material, and
the first link pattern and the first metal layer are made of a low resistance metal material having a specific resistance lower than the transparent conductive material.

9. A method of manufacturing a connection structure for connecting a cathode electrode and an auxiliary cathode electrode in an organic light-emitting diode display device in which an organic light-emitting diode having an anode electrode, an organic emission layer, and a cathode electrode are disposed in pixel regions partitioned by gate lines and data lines crossing each other, the method comprising:
forming a first metal layer on a gate insulating film covering the gate line, the first metal layer being in parallel with the data line;
forming a planarization film on the first metal layer to expose some region of the first metal layer;
depositing a transparent conductive material on the planarization film, and forming the anode electrode and a second metal layer separated from each other by patterning the transparent conductive material;
depositing an organic light-emitting material to cover the anode electrode and the second metal layer;
jetting a solvent onto a region in which the second metal layer is formed and exposing the second metal layer by drying the solvent; and
forming the cathode electrode covering the exposed second metal layer by depositing a transparent conductive material.

10. The method of claim 9 , wherein the planarization film including a concavo-convex shape having concave portions and convex portions so that the first metal layer is exposed at a plurality of first positions.

11. The method of claim 10 , wherein the second metal layer is exposed at a plurality of second positions corresponding to the convex portions of the planarization film.

12. The organic light-emitting diode display device of claim 1 , wherein the first link pattern is connected to the low potential source line at a non-display area.

13. The organic light-emitting diode display device of claim 12 , wherein the at least one auxiliary cathode electrode is connected to the first link pattern at the non-display area and connected to the cathode electrode at a display area.

Assignees

• Lg Display Co Ltd

Inventors

• Hong Sangpyo

Classifications

• H05B47/16

  by timing means · CPC title

• H05B45/60

  Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED] · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/325

  the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver · 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