ORGANIC LIGHT-EMITTING DISPLAY DEVICE

• US 20140151652A1
• Filed: 09/13/2013
• Published: 06/05/2014
• Est. Priority Date: 12/04/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Im, Ki-Ju, Choi, Chaun-Gi
• Granted Patent: US 9,196,667 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes

Abstract

An organic light-emitting display device includes a first electrode disposed on a substrate; a plurality of insulating layers which are sequentially disposed on the first electrode, and on which a contact hole for exposing a part of a surface of the first electrode is formed; and an organic light-emitting diode which includes a pixel electrode disposed on the plurality of insulating layers, a second electrode facing the pixel electrode and contacting the first electrode through the contact hole, and an organic emissive layer disposed between the pixel electrode and the second electrode.

Claims

1. An organic light-emitting display device, comprising:

first electrodes disposed on a substrate;

a plurality of insulating layers which are sequentially disposed on the first electrodes, and on which a contact hole for exposing a part of a surface of the first electrodes are formed; and

an organic light-emitting diode (OLED) which includes pixel electrodes disposed on the plurality of insulating layers, second electrodes facing the pixel electrodes and contacting the first electrodes through the contact hole, and an organic emissive layer disposed between the pixel electrode and the second electrodes.

2. The organic light-emitting display device of claim 1, wherein the first electrodes are formed of a same material and on a same layer as scanning lines.

3. The organic light-emitting display device of claim 2, further comprising a thin-film transistor (TFT) which includes gate electrodes disposed on the scanning lines, an active layer on the gate electrodes, and source and drain electrodes which contact source and drain areas, respectively, of the active layer.

4. The organic light-emitting display device of claim 3, wherein the active layer is formed of an oxide semiconductor.

5. The organic light-emitting display device of claim 3, wherein a thickness of the gate electrodes is less than a thickness of the scanning lines.

6. The organic light-emitting display device of claim 3, wherein the gate electrodes contact the scanning lines through a contact hole which is formed on an insulating layer on the scanning lines.

7. The organic light-emitting display device of claim 3, further comprising a capacitor which includes first capacitor electrodes disposed on a same layer as the scanning lines, second capacitor electrodes disposed on a same layer as the gate electrode, and third capacitor electrodes disposed on a same layer as the source and drain electrodes.

8. The organic light-emitting display device of claim 7, wherein the capacitor further comprises fourth capacitor electrodes which extend from the pixel electrode, and which are disposed on the third capacitor electrodes.

9. The organic light-emitting display device of claim 1, wherein the first electrodes overlap with a part of the pixel electrodes and contact the second electrodes through the contact hole, which is formed near the pixel electrodes.

10. The organic light-emitting display device of claim 1, wherein the first electrodes function as an auxiliary wiring of the second electrodes.

11. The organic light-emitting display device of claim 1, wherein the first electrodes do not overlap with a driving circuit unit which is formed on the first electrode or do partially overlap with the OLED.

12. An organic light-emitting display device, comprising:

scanning lines disposed in one direction on a substrate;

first electrodes disposed on a same layer as the scanning lines;

a plurality of insulating layers which are sequentially disposed on the first electrodes, and on which a contact hole for exposing a part of a surface of the first electrodes is formed; and

second electrodes which are disposed on an uppermost insulating layer among the plurality of insulating layers, and which contact the first electrodes through the contact hole.

13. The organic light-emitting display device of claim 12, wherein the first electrodes are formed of a same material and on the same layer as the scanning lines.

14. The organic light-emitting display device of claim 12, wherein the first electrodes overlap with a part of the pixel electrodes, which are disposed under the uppermost insulating layer and a part of which is exposed through a hole formed on the uppermost insulating layer, and the first electrodes contact the second electrodes through the contact hole, which is formed near the pixel electrodes.

15. The organic light-emitting display device of claim 12, wherein the first electrodes function as an auxiliary wiring of the second electrodes.

16. The organic light-emitting display device of claim 12, further comprising:

a driving circuit unit which is formed on the first electrode; and

an OLED including pixel electrodes, an organic emissive layer, and the second electrodes sequentially formed on the driving circuit unit.

17. The organic light-emitting display device of claim 16, wherein the first electrodes do not overlap with the driving circuit unit or do partially overlap with the OLED.

18. The organic light-emitting display device of claim 16, wherein the driving circuit unit comprises a thin-film transistor (TFT) which includes gate electrodes disposed on the scanning lines, an active layer on the gate electrodes, and source and drain electrodes which contact source and drain areas, respectively, of the active layer.

19. The organic light-emitting display device of claim 18, wherein the driving circuit unit comprises a capacitor which includes first capacitor electrodes disposed on the same layer as the scanning lines, second capacitor electrodes disposed on a same layer as the gate electrodes, and third capacitor electrodes disposed on a same layer as the source and drain electrodes.

20. The organic light-emitting display device of claim 19, wherein the capacitor further comprises fourth capacitor electrodes which extend from the pixel electrode, and which are disposed on the third capacitor electrodes.