Organic light emitting display device

• US 9,070,898 B2
• Filed: 07/21/2014
• Issued: 06/30/2015
• Est. Priority Date: 11/29/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Jung Yeon
• Primary Examiner(s): HINES, ANNE M
• Application Number:
  US14/336,788
• Publication Number:
  US 20150155522A1
• Time in Patent Office: 344 Days
• Field of Search: 313498-512
• US Class Current: 1/1
• CPC Class Codes: H10K 10/88 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/874 including getter material or desiccant

Abstract

An organic light emitting display device is disclosed which includes: an element substrate provided with a thin film transistor; an organic light emitting element electrically connected to the thin film transistor and formed on the element substrate; a protective layer formed on the organic light emitting element; an adhesive film configured to include a first adhesive layer and a second adhesive layer which are sequentially stacked on the protective layer, the first adhesive layer including a resin layer and the second adhesive layer including another resin layer and a filler; and a sealing substrate disposed on the second adhesive layer and combined with the element substrate, which is provided with the organic light emitting element, by the adhesive film. One of the resin layers of the first and second adhesive layers within the adhesive film is formed from a non-hardening resin layer.

Claims

1. An organic light emitting display device comprising:

an element substrate provided with a thin film transistor;

an organic light emitting element electrically connected to the thin film transistor and formed on the element substrate;

a protective layer formed on the organic light emitting element;

an adhesive film configured to include a first adhesive layer and a second adhesive layer which are sequentially stacked on the protective layer, the first adhesive layer including a resin layer and the second adhesive layer including another resin layer and a filler; and

a sealing substrate disposed on the second adhesive layer and combined with the element substrate, which is provided with the organic light emitting element, by the adhesive film,

wherein one of the resin layers of the first and second adhesive layers within the adhesive film is formed from a non-hardening resin layer.

2. The organic light emitting display device of claim 1, wherein the non-hardening resin layer is formed from a resin material with a modulus range of about 0.1˜

900 MPa.

3. The organic light emitting display device of claim 1, wherein the resin layer of the first adhesive layer and the resin layer of the second adhesive layer are formed from the non-hardening resin layer.

4. The organic light emitting display device of claim 3, wherein the resin layer of the first adhesive layer and the resin layer of the second adhesive layer are formed from the same material.

5. The organic light emitting display device of claim 1, wherein the resin layer of the first adhesive layer and the resin layer of the second adhesive layer are formed from different materials.

6. The organic light emitting display device of claim 5, wherein one of the resin layers of the first and second adhesive layers within the adhesive film is formed from the non-hardening resin layer and the other is formed from a hardening resin layer.

7. The organic light emitting display device of claim 6, wherein the hardening resin layer is formed from a resin material with a modulus range of about 1000˜

1100 MPa.

8. The organic light emitting display device of claim 5, further comprising a polymer layer disposed between the first adhesive layer and the second adhesive layer and configured to combine the first adhesive layer and the second adhesive layer.

9. The organic light emitting display device of claim 1, wherein the non-hardening resin layer is formed from at least one selected from a material group which includes a polyolefine-based resin material, a polyacrylic-based resin material, isobutylene, polyamide and polyimide.

10. The organic light emitting display device of claim 1, wherein the filler of the second adhesive layer is about 40 through 60 wt % with respect to the second adhesive layer.

11. The organic light emitting display device of claim 1, wherein the adhesive film further includes a third adhesive layer which is stacked on the second adhesive layer and formed from still another resin layer, and at least one of the resin layers of the first through third adhesive layers within the adhesive film is formed from the non-hardening resin layer.

12. The organic light emitting display device of claim 11, wherein the resin layers of the first and third adhesive layers are formed from the non-hardening resin layer and the resin layer of the second adhesive layer is formed from a hardening resin layer.

13. The organic light emitting display device of claim 12, further comprising polymer layers disposed between the first and second adhesive layers and between the second and third adhesive layers and configured to combined the adhesive layers adjacent thereto.