ORGANIC LIGHT EMTTING DISPLAY DEVICE

• US 20140138645A1
• Filed: 08/30/2013
• Published: 05/22/2014
• Est. Priority Date: 11/20/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ryu, Ji-Hun
• Granted Patent: US 9,000,427 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light emitting display device includes: a substrate; a display unit on the substrate; and an encapsulation layer on the display unit, the encapsulation layer including a plurality of inorganic layers and a plurality of organic layers, the plurality of inorganic layers and the plurality of organic layers being alternately located, and the plurality of organic layers being at a region where the plurality of inorganic layers is located. The plurality of inorganic layers covers the display unit and is sequentially on the substrate, and areas of each of the inorganic layers are increased moving in a direction away from the display unit.

Claims

1. An organic light emitting display device, comprising:

a substrate;

a display unit on the substrate; and

an encapsulation layer on the display unit,

wherein the encapsulation layer comprises a plurality of inorganic layers and a plurality of organic layers, the plurality of inorganic layers and the plurality of organic layers being alternately located, and the plurality of organic layers being at a region where the plurality of inorganic layers is located, and

wherein the plurality of inorganic layers covers the display unit and is sequentially on the substrate, and areas of each of the inorganic layers are increased moving in a direction away from the display unit.

2. The organic light emitting display device of claim 1, wherein an outermost layer of the encapsulation layer is formed by a corresponding one of the inorganic layers.

3. The organic light emitting display device of claim 1, wherein an edge of the encapsulation layer comprises the plurality of inorganic layers sequentially on the substrate, and in the plurality of inorganic layers, an upper inorganic layer covers an end of a lower inorganic layer.

4. The organic light emitting display device of claim 1, wherein in the plurality of organic layers, areas of each of the organic layers are increased moving in the direction away from the display unit.

5. The organic light emitting display device of claim 1, further comprising:

an encapsulation protecting layer covering the encapsulation layer.

6. The organic light emitting display device of claim 5, wherein the encapsulation protecting layer is an organic layer.

7. The organic light emitting display device of claim 1, wherein the display unit comprises a first electrode on the substrate;

an emission layer on the first electrode; and

a second electrode on the emission layer.

8. The organic light emitting display device of claim 7, wherein at least one of a hole injection layer or a hole transfer layer is between the first electrode and the emission layer.

9. The organic light emitting display device of claim 7, wherein at least one of an electron transport layer or an electron injection layer is between the emission layer and the second electrode.

10. The organic light emitting display device of claim 1, wherein a capping layer is between the display unit and the encapsulation layer.

11. The organic light emitting display device of claim 10, wherein the capping layer comprises a transparent material having ultraviolet light absorbing capacity.

12. The organic light emitting display device of claim 1, wherein a thickness of each inorganic layer of the plurality of inorganic layers is in a range of about 10 nm to about 50 nm.

13. The organic light emitting display device of claim 1, wherein a thickness of each organic layer of the plurality of organic layers is in a range of about 10 nm to about 50 nm.

14. A manufacturing method of an organic light emitting display device, the method comprising:

forming a display unit on a substrate; and

forming an encapsulation layer on the display unit, wherein the forming of the encapsulation layer comprises;

forming a first inorganic layer on the display unit; and

laminating organic layers and inorganic layers on the first inorganic layer in sequence, the organic layers being in a region where the inorganic layers are disposed,

wherein an upper inorganic layer completely covers a lower inorganic layer and the organic layers.

15. The manufacturing method of claim 14, wherein the organic layers and the inorganic layers are laminated many times.

16. The manufacturing method of claim 15, wherein the number of times of laminating the organic layers and the inorganic layers is 2 to 30 times.

17. The manufacturing method of claim 14, wherein an outermost layer of the encapsulation layer is formed by a corresponding one of the inorganic layers.

18. The manufacturing method of claim 14, wherein the upper inorganic layer covers an end of the lower inorganic layer.

19. The manufacturing method of claim 14, further comprising:

forming an encapsulation protecting layer covering the encapsulation layer, after the laminating the organic layers and the inorganic layers.

20. The manufacturing method of claim 14, wherein the forming the display unit comprises forming a first electrode on the substrate;

forming an emission layer on the first electrode; and

forming a second electrode on the emission layer.

21. The manufacturing method of claim 14, further comprising:

forming a capping layer on the display unit, after the forming the display unit.

22. The manufacturing method of claim 14, wherein a thickness of each of the inorganic layers is in a range of about 10 nm to 50 nm.

23. The manufacturing method of claim 14, wherein a thickness of each of the organic layers is in a range of about 10 nm to 50 nm.