Organic light emitting display apparatus

• US 8,362,683 B2
• Filed: 03/02/2011
• Issued: 01/29/2013
• Est. Priority Date: 03/09/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Tamura, Shinichiro, Kim, Hyo-Seok, Choi, Byoung-Ki
• Primary Examiner(s): Santiago, Mariceli
• Application Number:
  US13/064,015
• Publication Number:
  US 20110220921A1
• Time in Patent Office: 699 Days
• Field of Search: 313500-512, 445/24, 445/25, 427/66, 315/169.3, 345/36, 345/44, 345 76- 80
• US Class Current: 313/500
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

An organic light emitting display apparatus includes a plurality of sub-pixels, each of the sub-pixels having a first electrode, a second electrode facing the first electrode, and an intermediate layer disposed between the first and second electrodes, the intermediate layer having a plurality of layers including an organic emission layer, at least one layer of the plurality of layers in the intermediate layer being commonly shared by two sub-pixels arranged in a first direction and by at least two sub-pixels arranged in a second direction perpendicular to the first direction.

Claims

1. An organic light emitting display apparatus comprising a plurality of primary sub-pixels, each of the primary sub-pixels including:

a plurality of secondary sub-pixels of a same color;

a first electrode corresponding to each secondary sub-pixel;

a second electrode facing the first electrodes; and

an intermediate layer disposed between the first and second electrodes, the intermediate layer having a plurality of layers including an organic emission layer, at least one layer of the plurality of layers in the intermediate layer being commonly shared by two secondary sub-pixels arranged in a first direction and by at least two secondary sub-pixels arranged in a second direction perpendicular to the first direction, wherein each primary sub-pixel is aligned with an adjacent primary sub-pixel along each of the first and second directions.

2. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer is continuous in four secondary sub-pixels arranged in the second direction, the four sub-pixels in the second direction emitting light of a same color.

3. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer is the organic emission layer.

4. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer has a square shape.

5. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer corresponds to secondary sub-pixels emitting light of the same color.

6. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer overlaps at least four secondary sub-pixels, the at least four secondary sub-pixels being adjacent to each other and arranged in a matrix pattern.

7. The organic light emitting display apparatus as claimed in claim 1, wherein the at least one commonly shared layer of the intermediate layer is a continuous layer overlapping at least four secondary sub-pixels and regions therebetween.

8. The organic light emitting display apparatus as claimed in claim 1, wherein each primary sub-pixel overlaps a single adjacent primary sub-pixel along each of the first and second directions.

9. The organic light emitting display apparatus as claimed in claim 1, wherein all the secondary sub-pixels within each of the primary sub-pixels emit a same light color.

10. The organic light emitting display apparatus as claimed in claim 9, wherein first through third adjacent primary sub-pixels emit three different light colors, a first primary sub-pixel including more secondary sub-pixels than each of the second and third primary sub-pixels.

11. A method of forming an organic light emitting display apparatus with a plurality of primary sub-pixels, the method comprising:

defining a plurality of secondary sub-pixels of a same color;

forming a first electrode in each secondary sub-pixel;

forming a second electrode facing the first electrode; and

forming an intermediate layer between the first and second electrodes, the intermediate layer having a plurality of layers including an organic emission layer, at least one layer of the plurality of layers in the intermediate layer being commonly formed in two secondary sub-pixels arranged in a first direction and in at least two secondary sub-pixels arranged in a second direction perpendicular to the first direction, wherein each primary sub-pixel is aligned with an adjacent primary sub-pixel along each of the first and second directions.

12. The method as claimed in claim 11, wherein forming the at least one layer of the plurality of layers in the intermediate layer includes using a mask having opening, the openings in the mask being larger than a size of a single secondary sub-pixel in the organic light emitting display apparatus.

13. The method as claimed in claim 12, wherein each opening in the mask overlaps at least four secondary sub-pixels emitting a same color of light.