Electroluminescent display

• US 7,781,966 B2
• Filed: 01/23/2007
• Issued: 08/24/2010
• Est. Priority Date: 07/11/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Nam, Wi Jin
• Primary Examiner(s): Patel; Nimeshkumar D.
• Assistant Examiner(s): Haderlein; Peter R
• Application Number:
  US11/656,509
• Publication Number:
  US 20080012485A1
• Time in Patent Office: 1,309 Days
• Field of Search: 313/511, 313/504, 313/512
• US Class Current: 313/512
• CPC Class Codes: H10K 50/8423 Metallic sealing arrangements
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 59/8721 Metallic sealing arrangements

Abstract

An EL display, including a substrate having a pixel region and a non-pixel region, at least one light emitting diode disposed on the pixel region of the substrate, a sealant disposed on the non-pixel region of the substrate, an oxygen generating layer, an absorbent layer laminated onto the oxygen generating layer, and a cap adhered to the sealant, such that the at least one light emitting diode, the oxygen generating layer, and the absorbent layer are enclosed between the cap and the substrate.

Claims

1. An electroluminescent display, comprising:

a substrate having a pixel region and a non-pixel region;

at least one light emitting diode disposed on the pixel region of the substrate;

a sealant disposed on the non-pixel region of the substrate;

an oxygen generating layer;

an absorbent layer laminated to the oxygen generating layer; and

a cap having inner and outer surfaces, and adhered to the sealant, wherein the at least one light emitting diode, oxygen generating layer, and absorbent layer are enclosed between the inner surface of the cap and the substrate.

2. The electroluminescent display as claimed in claim 1, wherein the oxygen generating layer is disposed on the inner surface of the cap.

3. The electroluminescent display as claimed in claim 1, wherein the oxygen generating layer is capable of absorbing moisture.

4. The electroluminescent display as claimed in claim 1, wherein the oxygen generating layer comprises peroxides of alkali metals or peroxides of alkaline earth metals.

5. The electroluminescent display as claimed in claim 4, wherein the oxygen generating layer further comprises a catalyst.

6. The electroluminescent display as claimed in claim 5, wherein the catalyst is manganese dioxide, activated carbon, or catalase.

7. The electroluminescent display as claimed in claim 1, wherein the absorbent layer is disposed between the inner surface of the cap and the oxygen generating layer.

8. The electroluminescent display as claimed in claim 1, wherein the absorbent layer is adjacent to the oxygen generating layer.

9. The electroluminescent display as claimed in claim 1, wherein the absorbent layer includes calcium or calcium oxide.

10. The electroluminescent display as claimed in claim 1, further comprising a driver integrated circuit (IC) electrically connected to the at least one light emitting diode.

11. The electroluminescent display as claimed in claim 1, further comprising a printed circuit board disposed on the outer surface of the cap.

12. The electroluminescent display as claimed in claim 1, wherein the at least one light emitting diode is an organic light emitting diode.

13. The electroluminescent display as claimed in claim 1, wherein the cap is a metal cap.

14. The electroluminescent display as claimed in claim 1, wherein the oxygen generating layer and the absorbent layer are two distinct layers having a single contact plane therebetween.

15. The electroluminescent display as claimed in claim 1, wherein at least one of the oxygen generating layer and the absorbent layer is directly on the inner surface of the cap.

16. The electroluminescent display as claimed in claim 15, wherein the absorbent layer is directly on the inner surface of the cap, the absorbent layer being directly between the inner surface of the cap and the oxygen generating layer.

17. The electroluminescent display as claimed in claim 1, wherein the oxygen generating layer and the absorbent layer extend along the inner surface of the cap in parallel to the substrate, the oxygen generating layer and the absorbent layer completely overlapping each other.