Pixel structure and organic light emitting display using the same

• US 20110025723A1
• Filed: 05/07/2010
• Published: 02/03/2011
• Est. Priority Date: 08/03/2009
• Status: Abandoned Application

• Current Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Eunah
• Application Number:
  US12/662,868
• Publication Number:
  US 20110025723A1
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

A pixel that is adapted for implementing higher definition and an organic light emitting display using such a pixel are provided. The pixel includes a red sub-pixel including a red emitting layer, a green sub-pixel including a green emitting layer, a first blue sub-pixel including a first blue emitting layer, and a second blue sub-pixel including a second blue emitting layer. The red emitting layer and the green emitting layer are symmetrically arranged and the first blue emitting layer and the second blue emitting layer are symmetrically arranged.

Claims

1. A pixel, comprising:

a red sub-pixel including a red emitting layer;

a green sub-pixel including a green emitting layer;

a first blue sub-pixel including a first blue emitting layer; and

a second blue sub-pixel including a second blue emitting layer,

wherein the red emitting layer and the green emitting layer are symmetrically arranged and the first blue emitting layer and the second blue emitting layer are symmetrically arranged.

2. The pixel as claimed in claim 1, wherein each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has a triangular shape.

3. The pixel as claimed in claim 2, wherein each of the triangular shaped areas of each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer includes two sides having a same length.

4. The pixel as claimed in claim 2, wherein the pixel has a diamond or square shape, and one side of each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer substantially corresponds to a respective side of the diamond or square shape of the pixel.

5. The pixel as claimed in claim 4, wherein each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has a triangular shape, and a base of each of the triangular shaped emitting areas extends along the respective side of the pixel.

6. The pixel as claimed in claim 1, wherein each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has a same area.

7. The pixel as claimed in claim 1, wherein the red emitting layer is in contact with a red emitting layer of a first adjacent pixel, the green emitting layer is in contact with a green emitting layer of a second adjacent pixel, the first blue emitting layer is in contact with a first blue emitting layer of a third adjacent pixel, and the second blue emitting layer is in contact with a second blue emitting layer of a fourth adjacent pixel.

8. The pixel as claimed in claim 7, wherein the red emitting layer of the pixel and the red emitting layer of the first adjacent pixel together define a square shape, the green emitting layer of the pixel and the green emitting layer of the second adjacent pixel together define a square shape, the first blue emitting layer of the pixel and the first blue emitting layer of the third adjacent pixel together define a square shape, and the second blue emitting layer of the pixel and the second blue emitting layer of the fourth adjacent pixel together define a square shape.

9. The pixel as claimed in claim 1, wherein the red emitting layer, the green emitting layer, the first blue emitting layer and the second blue emitting layer of the pixel are spaced apart from each other by a predetermined margin, the margin having a cross-like shape therebetween.

10. The pixel as claimed in claim 1, wherein the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer are arranged in a square space.

11. The pixel as claimed in claim 1, wherein the red emitting layer and the green emitting layer are symmetrically arranged about a first axis and the first blue emitting layer and the second blue emitting layer are symmetrically arranged about a second axis, the first axis being perpendicular to the second axis.

12. An organic light emitting display, comprising:

a pixel unit including a plurality of pixels adapted to emit light in response to a data signal and a scan signal supplied thereto;

a data driver adapted to transmit the data signals to the pixel unit;

a scan driver adapted to transmit the scan signals to the pixel unit,

wherein each of the pixel comprises;

a red sub-pixel including a red emitting layer;

a green sub-pixel including a green emitting layer;

a first blue sub-pixel including a first blue emitting layer; and

a second blue sub-pixel including a second blue emitting layer,

wherein the red emitting layer and the green emitting layer are symmetrically arranged and the first blue emitting layer and the second blue emitting layer are symmetrically arranged.

13. The organic light emitting display as claimed in claim 12, wherein for each of the pixels, each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has a triangular shape.

14. The organic light emitting display as claimed in claim 12, wherein each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has the same area.

15. The organic light emitting display as claimed in claim 12, wherein for each of the pixels surrounded by others of the plurality of pixels, the red emitting layer is in contact with a red emitting layer of a first respective adjacent pixel, the green emitting layer is in contact with a green emitting layer of a second respective adjacent pixel, the first blue emitting layer is in contact with a first blue emitting layer of a third respective adjacent pixel, and the second blue emitting layer is in contact with a second blue emitting layer of a fourth respective adjacent pixel.

16. The organic light emitting display as claimed in claim 12, wherein for each pixel pair of the plurality of pixels arranged adjacent to each other, the pixels of the pixel pair are symmetric about an axis extending therebetween.

17. The organic light emitting display as claimed in claim 12, wherein the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer are arranged in a square space.

18. A pixel, comprising:

a plurality of emitting layers adapted to emit light of a plurality of colors, the plurality of emitting layers being symmetrically arranged about a center of the pixel, the plurality of emitting layers including a red emitting layer, a green emitting layer, a first blue emitting layer, and a second blue emitting layer.

19. The pixel as claimed in claim 18, wherein the red emitting layer and the green emitting layer are symmetrically arranged about a first axis passing through the center of the pixel and the first blue emitting layer and the second blue emitting layer are symmetrically arranged about a second axis passing through the center of the pixel, the first axis being perpendicular to the second axis.

20. The pixel as claimed in claim 18, wherein each of the red emitting layer, the green emitting layer, the first blue emitting layer, and the second blue emitting layer has a triangular shape, and a base of each of the triangular shaped emitting areas extends along a respective side of the pixel.