Organic light emitting display device including light absorption pattern unit

• US 8,253,322 B2
• Filed: 01/02/2009
• Issued: 08/28/2012
• Est. Priority Date: 03/19/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Dong-Kyu
• Primary Examiner(s): Guharay, Karabi
• Application Number:
  US12/348,098
• Publication Number:
  US 20090236976A1
• Time in Patent Office: 1,334 Days
• Field of Search: 313/504, 313/506, 313/112, 313/512
• US Class Current: 313/504
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

An organic light emitting display device includes a substrate, a display unit that is formed on the substrate, and includes a plurality of organic light emitting regions that emit light, a sealing member disposed above the display unit, and one or more light absorption pattern units formed on a plurality of non-light emitting regions of the display unit.

Claims

1. An organic light emitting display device comprising:

a substrate;

a display unit formed on the substrate and comprising a plurality of organic light emitting regions and a plurality of non-light emitting regions;

a sealing member above the display unit, the sealing member forming a sealed air space between the display unit and the sealing member, the sealed air space including first air spaces directly over the organic light emitting regions and below the sealing member, and second air spaces directly over the non-light emitting regions and below the sealing member; and

light absorption pattern units formed on the non-light emitting regions,

wherein the light absorption pattern units are configured with a height sufficient

to prevent the sealing member from contacting the display unit, and

to prevent all light from one of the organic light emitting regions from directly entering ones of the first air spaces corresponding to adjacent ones of the organic light emitting regions.

2. The organic light emitting display device of claim 1, wherein the light absorption pattern units are formed of a material having a high light absorption coefficient.

3. The organic light emitting display device of claim 1, wherein the light absorption pattern units are configured

to absorb light emitted from the organic light emitting regions toward the sealing member and

to reduce mixing of light of different ones of the organic light emitting regions with each other.

4. The organic light emitting display device of claim 1, further comprising black matrices formed on the sealing member to correspond to the non-light emitting regions.

5. The organic light emitting display device of claim 1, further comprising color filters formed on the sealing member to correspond to the organic light emitting regions.

6. The organic light emitting display device of claim 1, wherein the height of the light absorption pattern units is in a range from about 2 to 3 μ

m.

7. An organic light emitting display device comprising:

a substrate;

a first electrode formed on the substrate;

a sealing member covering the substrate;

a display unit formed on the substrate and between the sealing member and the substrate, the display unit comprising a plurality of organic light emitting regions and a plurality of non-light emitting regions, the display unit and the sealing member defining a corresponding plurality of first spaces directly over the plurality of organic light emitting regions and below the sealing member, and a corresponding plurality of second spaces directly over the plurality of non-light emitting regions and below the sealing member, the display unit comprising;

a pixel defining layer formed on the first electrode and defining an opening to expose a portion of the first electrode;

an intermediate layer comprising an emissive layer and formed on the exposed portion of the first electrode;

a second electrode formed on the pixel defining layer and the intermediate layer; and

a light absorption pattern unit consisting essentially of a polymer organic material and formed on the second electrode to correspond to the pixel defining layer,

wherein the light absorption pattern unit is between a first one of the organic light emitting regions and a second one of the light emitting regions, and configured with a height sufficient to prevent all light from the first one of the organic light emitting regions from directly entering one of the first spaces corresponding to the second one of the organic light emitting regions.

8. The organic light emitting display device of claim 7, wherein the height of the light absorption pattern unit is in a range from about 2 to 3 μ

m.

9. The organic light emitting display device of claim 7, wherein the light absorption pattern unit is configured to absorb light emitted from the intermediate layer, such that mixing of the light with light emitted from another intermediate layer is reduced.

10. The organic light emitting display device of claim 7, further comprising:

a black matrix formed on the sealing member to correspond to the pixel defining layer.

11. The organic light emitting display device of claim 7, further comprising:

a color filter formed on the sealing member to correspond to the intermediate layer.

12. The organic light emitting display device of claim 7, wherein the light absorption pattern unit is formed of a material having a high light absorption coefficient.

13. An organic light emitting display device comprising:

a substrate;

a first electrode formed on the substrate;

a sealing member covering the substrate;

a display unit formed on the substrate and between the sealing member and the substrate, the display unit comprising a plurality of organic light emitting regions and a plurality of non-light emitting regions, the display unit and the sealing member defining a corresponding plurality of first spaces directly over the plurality of light emitting regions and below the sealing member, and a corresponding plurality of second spaces directly over the plurality of non-light emitting regions and below the sealing member, the display unit comprising;

a pixel defining layer formed on the first electrode and defining an opening to expose a portion of the first electrode;

an intermediate layer comprising an emissive layer and formed on the exposed portion of the first electrode;

a light absorption pattern unit formed on the pixel defining layer, a top surface of the light absorption pattern unit being above a top surface of the intermediate layer; and

a second electrode formed on the intermediate layer and the top surface of the light absorption pattern unit,

wherein the light absorption pattern unit is between a first one of the organic light emitting regions and a second one of the light emitting regions, and configured with a height sufficient to prevent all light from the first one of the organic light emitting regions from directly entering one of the first spaces corresponding to the second one of the organic light emitting regions.

14. The organic light emitting display device of claim 13, wherein the height of the light absorption pattern unit is in a range from about 2 to 3 μ

m.

15. The organic light emitting display device of claim 13, wherein the light absorption pattern unit is configured to absorb light emitted from the intermediate layer, such that mixing of the light with light emitted from another intermediate layer is reduced.

16. The organic light emitting display device of claim 13, further comprising:

a black matrix formed on the sealing member to correspond to the pixel defining layer.

17. The organic light emitting display device of claim 13, further comprising:

a color filter formed on the sealing member to correspond to the intermediate layer.

18. The organic light emitting display device of claim 13, wherein the light absorption pattern unit is formed of a material having a high light absorption coefficient.