Organic light emitting display device

• US 9,054,327 B2
• Filed: 11/20/2012
• Issued: 06/09/2015
• Est. Priority Date: 11/21/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Jong Sung, Kim, Ho Jin
• Primary Examiner(s): Lam, Cathy N
• Application Number:
  US13/681,645
• Publication Number:
  US 20130126837A1
• Time in Patent Office: 931 Days
• Field of Search: 257/40, 257/682, 257/E21.5, 257/E23.13, 257/88
• US Class Current: 1/1
• CPC Class Codes: H10K 50/00 Organic light-emitting devices integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 85/00 Organic materials used in the body or electrodes of devices covered by this subclass

Abstract

An organic light emitting display device is disclosed which includes: a substrate defined into a display area and a non-display area; a light emission diode layer formed on the substrate and configured to emit light; a TFE layer formed on the light emission diode layer and configured to protect the light emission diode layer; an intrusive moisture guide layer configured to prevent moisture intrusion into the light emission diode layer; and a getter configured to absorb moisture which is guided by the intrusive moisture guide layer.

Claims

1. An organic light emitting display device, comprising:

a substrate comprising a display area and a non-display area;

a light emission diode layer disposed on the substrate and configured to emit light;

a thin film encapsulation (TFE) layer on the light emission diode layer in a stacked layer structure of organic and inorganic films and configured to protect the light emission diode layer from oxygen and moisture;

a getter on an organic film of said thin film encapsulation (TFE) layer in the non-display area and configured to absorb mositure from the thin film encapsulation (TFE) layer; and

an intrusive moisture guide layer disposed under the thin film encapsulation (TFE) layer and configured to guide any moisture from the thin film encapsulation (TFE) layer to the getter.

2. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer and the getter are disposed in the same layer.

3. The organic light emitting display device of claim 1, wherein the getter contacts the intrusive moisture guide layer.

4. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer is disposed in the display area.

5. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer and the getter are disposed in a middle portion of the thin film encapsulation (TFE) layer.

6. The organic light emitting display device of claim 1, wherein the light emission diode layer comprises a transparent electrode, a hole transport layer, an light emission layer, an electron transport layer, and a metal electrode.

7. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer comprises a plate shape and is configured to disperse the moisture laterally.

8. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer has a refractive index between those of the light emission diode layer and the thin film encapsulation (TFE) layer.

9. The organic light emitting display device of claim 1, wherein the intrusive moisture guide layer and the getter are disposed on the inorganic film.

10. The organic light emitting display device of claim 5, wherein the intrusive moisture guide layer is disposed between the organic film and inorganic film of the thin film encapsulation (TFE) layer.

11. The organic light emitting display device of claim 1, wherein the instrusive moisture guide layer comprises a transparent material.

12. An apparatus, comprising:

a light emission structure, comprising a stacked layer configuration, on a display area of a substrate; and

a thin film encapsulation (TFE) structure, comprising a stacked layer configuration comprising organic and inorganic films, covering both the display area and a non-display area of the substrate, and configured to protect the light emission structure from oxygen or moisture, the TFE structure including a guide layer, above the light emission structure extending into a portion of the non-display area of the substrate, the TFE structure configured to further protect the light emission structure from oxygen or moisture.

13. The apparatus of claim 12, further comprising a getter at side edges of the guide layer, the getter extending into the portion of the non-display area of the substrate to absorb moisture from the guide layer.

14. The apparatus of claim 13, wherein the getter is configured to enclose the display area.

15. The apparatus of claim 14, wherein the guide layer comprises a refractive index between a refractive index of the light emission structure and a refractive index of at least some of the organic and inorganic films in the TFE structure, the refractive index minimizing light loss.

16. apparatus of claim 15, wherein the guide layer is disposed in a planar surface in contact with at least one inorganic film of the stacked layer configuration of the TFE structure.

17. The apparatus of claim 16, further comprising adhesive layers that provide adhesion between the organic and inorganic films in the TFE structure, the adhesive layers comprising at least one among cpoxy based resins and acrylatc based resins.