Organic light emitting diode display

Patent metadata

Field	Value
Publication number	US-9000428-B2
Application number	US-201314037195-A
Country	US
Kind code	B2
Filing date	Sep 25, 2013
Priority date	May 9, 2013
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

An organic light emitting diode (OLED) display with electrostatic discharges protection is disclosed. One inventive aspect includes a substrate including a pixel area and a peripheral area, an organic light emitting diode (OLED) formed at the pixel area, a driving circuit formed at the peripheral area, a shield layer formed with the same layer as the first electrode, and a first shield voltage line connected to the shield layer. The first shield voltage line transmits a shield voltage to the shield layer. The shield layer includes a plurality of sub-shield layers and covers the driving circuit to prevent an external electrostatic discharge.

First claim

What is claimed is:

1. An organic light emitting diode (OLED) display comprising:
a substrate including a pixel area and a peripheral area, the peripheral area enclosing the pixel area;
an OLED formed at the pixel area and including a first electrode, an organic emission layer and a second electrode;
a driving circuit formed at the peripheral area and configured to drive the OLED;
a shield layer formed with the same layer as the first electrode and covering the driving circuit, the shield layer including a plurality of sub-shield layers; and
a first shield voltage line connected to the shield layer and transmitting a shield voltage to the shield layer.

2. The display of claim 1 , wherein the first shield voltage line is connected to one end of each of the sub-shield layers.

3. The display of claim 2 , further comprising a second shield voltage line connected to the other end of the each of the sub-shield layers.

4. The display of claim 3 , wherein the first shield voltage line is formed on an edge of the peripheral area and has a guard ring shape.

5. The display of claim 4 , further comprising:
a surrounding semiconductor layer formed at the peripheral area on the substrate;
a gate insulating layer formed on the surrounding semiconductor layer;
a surrounding gate electrode formed on the gate insulating layer;
an interlayer insulating layer formed on the surrounding gate electrode;
a surrounding source electrode and a surrounding drain electrode formed on the interlayer insulating layer and connected to the surrounding semiconductor layer through a contact hole formed at the interlayer insulating layer;
a first shield voltage line formed on the interlayer insulating layer; and
a protective layer covering the surrounding source electrode, the surrounding drain electrode and the first shield voltage line,
wherein the shield layer and the first electrode are formed on the protective layer.

6. The display of claim 5 , further comprising a second shield voltage line formed on the interlayer insulating layer.

7. The display of claim 6 , wherein the first shield voltage line and the second shield voltage line are connected to a common power source or a ground power source.

8. The display of claim 5 , wherein the second shield voltage line connects to the other end of the each of the plurality of sub-shield layers through at least one contact hole formed in the protective layer.

9. The display of claim 5 , wherein the protective layer further includes at least one via hole exposing a predetermined portion of the surrounding source electrode, the surrounding drain electrode and the first shield voltage line.

10. The display of claim 1 , wherein the shield layer further comprises a plurality of holes.

11. The display of claim 1 , further comprising a buffer layer formed on at least one of the pixel area and the peripheral area.

12. The display of claim 1 , further comprising a pixel definition layer formed on the pixel area, the pixel definition layer including an opening exposing a portion of the first electrode.

13. The display of claim 1 , wherein the shield layer is formed of the same material as that for an anode of the driving circuit.

14. The display of claim 1 , wherein the first electrode further includes at least one of a red first electrode, a green first electrode and a blue first electrode.

15. The display of claim 1 , further comprising at least one driving thin film transistor formed in the pixel area, the at least one driving thin film transistor further comprising:
a pixel semiconductor layer;
a pixel source electrode including a source region, a drain region and a channel region;
a pixel drain electrode connected to the source region and the drain region; and
a pixel gate electrode formed on the channel region and insulted from the pixel semiconductor layer.

16. The display of claim 15 , wherein the pixel gate electrode is insulted from the pixel semiconductor layer by a gate insulating layer formed in the peripheral area.

17. An organic light emitting diode (OLED) display comprising:
a substrate including a pixel area and a peripheral area, the peripheral area enclosing the pixel area;
an OLED formed at the pixel area and including a first electrode, an organic emission layer and a second electrode;
a driving circuit formed at the peripheral area and configured to drive the OLED; and
a shield layer formed with the same layer as the first electrode and covering the driving circuit, the shield layer including a plurality of sub-shield layers and a plurality of holes.

18. The display of claim 17 , wherein the shield layer is formed of the same material as that for an anode of the driving circuit.

19. The display of claim 17 , further comprising at least one driving thin film transistor formed in the pixel area, the at least one driving thin film transistor further comprising:
a pixel semiconductor layer;
a pixel source electrode including a source region, a drain region and a channel region;
a pixel drain electrode connected to the source region and the drain region; and
a pixel gate electrode formed on the channel region and insulted from the pixel semiconductor layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jae-Yong
• Kwak Won-Kyu

Classifications

• H01L27/3272 Primary

  Electricity · mapped topic

• G09F9/301

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/126 Primary

  Shielding, e.g. light-blocking means over the TFTs · CPC title