Organic light-emitting display system and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9263676-B2
Application number	US-201414308487-A
Country	US
Kind code	B2
Filing date	Jun 18, 2014
Priority date	Nov 19, 2012
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

An organic light-emitting display system and a method of manufacturing the same are disclosed. In one aspect, the organic light-emitting display system includes a substrate, a display unit that defines an active area on the substrate and includes a plurality of thin film transistor (TFTs), and an encapsulation layer that seals the display unit and has a stacked structure in which at least a first inorganic film, a first organic film, and a second inorganic film are sequentially stacked. The TFTs includes an active layer, a gate electrode, a source electrode, a drain electrode, and an interlayer insulating film that is disposed between the gate electrode and the source electrode and between the gate electrode and the drain electrode, wherein the second inorganic film directly contacts the interlayer insulating film outside the active area. Accordingly, in various embodiments, since an inorganic layer of a thin film encapsulation layer is prevented from being cracked, penetration of external moisture or oxygen into the active area of the display can be reduced or prevents.

First claim

What is claimed is:

1. An organic light-emitting display system, comprising:
a substrate;
a display unit that defines an active area on the substrate, and comprises a plurality of thin film transistors (TFTs) and a plurality of organic light-emitting devices (OLEDs);
an encapsulation layer that seals the display unit, and has a stacked structure in which at least a first inorganic film, a first organic film, and a second inorganic film are sequentially stacked from bottom to top; and
a protective layer that is formed between the encapsulation layer and the display unit,
wherein the TFTs comprise an interlayer insulating film that extends to points that are substantially outside of the active area,
wherein the coverage area of the second inorganic film is greater than the coverage area of each of the first inorganic film and the first organic film, and the second inorganic film contacts a top surface of the interlayer insulating film at points that are substantially outside the active area.

2. The organic light-emitting display system of claim 1 , wherein the interlayer insulating film and the second inorganic film are formed of the same material.

3. The organic light-emitting display system of claim 1 ,
wherein the protective layer comprises a capping layer that covers the counter electrode, and a shield layer that is formed on the capping layer,
wherein the first inorganic film surrounds the protective layer.

4. The organic light-emitting display system of claim 1 , wherein the coverage area of the first inorganic film is greater than the coverage area of the first organic film.

5. The organic light-emitting display system of claim 3 , wherein the shield layer is formed of lithium fluoride (LiF) having a pin-hole structure, and the first inorganic film is formed of aluminum oxide (AlOx).

6. The organic light-emitting display system of claim 1 ,
wherein the encapsulation layer further comprises a second organic film that is formed on the second inorganic film, and a third inorganic film that is formed on the second organic film,
wherein the third inorganic film contacts a top surface of the second inorganic film outside the active area.

7. The organic light-emitting display system of claim 6 , wherein the second inorganic film and the third inorganic film are formed of the same material.

8. The organic light-emitting display system of claim 7 , wherein the film material is silicon nitride (SiNx).

9. The organic light-emitting display system of claim 1 ,
wherein the TFTs further comprise an active layer, a gate electrode, a source electrode, and a drain electrode,
wherein the interlayer insulating film is disposed between the gate electrode and the source electrode and between the gate electrode and the drain electrode.

10. The organic light-emitting display system of claim 1 ,
wherein the organic light-emitting device comprises a pixel electrode that is connected to the TFTs, an intermediate layer that is disposed on the pixel electrode and comprises an organic light-emitting layer, and a counter electrode that is formed on the intermediate layer,
wherein the shield layer covers the counter electrode.

11. An organic light-emitting display system, comprising:
a substrate;
a display unit formed on the substrate comprising a central pixel portion having a plurality of pixels, each pixel comprising a thin film transistors (TFT) and an organic light emitting diode (OLED); and
an encapsulation layer that seals the display unit and has a stacked structure in which at least a first inorganic film, a first organic film, and a second inorganic film are sequentially stacked from bottom to top,
wherein the TFTs comprise a non-conductive layer,
wherein the second inorganic film extends beyond the pixel portion and contact the non-conductive layer in a peripheral portion of the display unit, and
wherein the coverage area of the second inorganic film is greater than the coverage area of each of the first inorganic film and the first organic film, and the second inorganic film contacts a top surface of the non-conductive layer at points that are substantially outside the active area.

12. The display system of claim 11 , wherein the inorganic non-conductive layer is an interlayer insulating film.

13. The display system of claim 11 , wherein the second inorganic film and the non-conductive layer are formed of the same material.

14. The display system of claim 11 , wherein the first inorganic film is formed of aluminum oxide (AlOx).

15. The display system of claim 11 , wherein the second inorganic film covers the first organic film.

16. The display system of claim 11 ,
wherein the encapsulation layer further comprises a second organic film that is formed on the second inorganic film, and a third inorganic film that is formed on the second organic film,
wherein the third inorganic film contacts a top surface of the second inorganic film at points that are substantially outside the active area.

17. The display system of claim 16 , wherein the third inorganic film covers the second organic film.

18. The display system of claim 16 , wherein the second inorganic film and the third inorganic film are formed of the same material.

19. The display system of claim 16 , wherein the second inorganic film and the third inorganic film have the same end positions.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jeong-Yeol
• Cho Yoon-Hyeung
• Han Ouck

Classifications

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10D99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• H01L51/56

  Electricity · mapped topic