Organic electroluminescent device

1. An organic electroluminescent device, comprising:

a plurality of first pixel regions, each including a first red sub-pixel region, a first green sub-pixel region and a deep blue sub-pixel region; and

a plurality of second pixel regions, each including a second red sub-pixel region, a second green sub-pixel region and a sky blue sub-pixel region,

wherein each of the plurality of first and second pixel regions includes three sub-pixel regions, the first red sub-pixel region being the same as the second red sub-pixel region, the first green sub-pixel region being the same as the second green sub-pixel region and wherein the plurality of first pixel regions and the plurality of second pixel regions are alternately arranged with each other.

2. The device according to claim 1 , wherein each of the deep blue sub-pixel region and the sky blue sub-pixel region has an area lager than each of the red and green sub-pixel regions.

3. The device according to claim 1 , wherein the first red sub-pixel region and the first green sub-pixel region are positioned at one side of the deep blue sub-pixel region, and the second red-sub-pixel region and the second green sub-pixel region are positioned at the other side of the deep blue sub-pixel region such that the second red-sub-pixel region and the second green sub-pixel region are positioned between the deep blue sub-pixel region and the sky blue sub-pixel region.

4. The device according to claim 3 , wherein a first unit pixel using the first red sub-pixel region and the first green sub-pixel region and a second unit pixel using the second red sub-pixel region and the second green sub-pixel region share the deep blue sub-pixel region.

5. The device according to claim 1 , wherein the second red sub-pixel region and the second green sub-pixel region are positioned at one side of the sky blue sub-pixel region and has the same distance with the sky blue sub-pixel region.

6. The device according to claim 5 , wherein each of the second red sub-pixel region and the second green sub-pixel region has a trapezoidal shape.

7. The device according to claim 6 , wherein a shorter side of the second red sub-pixel region and a longer side of the second green sub-pixel region face the sky blue sub-pixel region.

8. The device according claim 1 , wherein the first red sub-pixel region and first green sub-pixel region are arranged along a first direction and the deep blue sub-pixel region is arranged along a second direction with respect to the first red sub-pixel region and first green sub-pixel region.

9. The device according to claim 8 , wherein the deep blue sub-pixel region has a diamond shape, each of the first red sub-pixel region and the first green sub-pixel region has a trapezoidal shape, and wherein a shorter side of the first red sub-pixel region faces a shorter side of the first green sub-pixel region.

10. The device according to claim 1 , wherein the deep blue organic emission material pattern includes a blue color host and a deep blue color dopant having an emission peak below about 460 nm.

11. The device according to claim 10 , wherein the deep blue color dopant has a weight % of about 2 to about 10 with respect to a blue color host.

12. The device according to claim 1 , wherein the sky blue organic emission material pattern includes a blue color host and a sky blue color dopant having an emission peak below about 470 nm.

13. The device according to claim 12 , wherein the sky blue color dopant has a weight % of about 2 to about 10 with respect to a blue color host.

14. The device according to claim 1 , wherein each of the first red sub-pixel region and the first green sub-pixel region has a longer side and a shorter side, the shorter side of one of the first red sub-pixel region and the first green sub-pixel region and the longer side of the other one of the first red sub-pixel region and the first green sub-pixel region face the deep blue sub-pixel region.

15. An organic electroluminescent device, comprising:

a plurality of first pixel regions, each of the first pixel regions having three sub-pixel regions of a first red sub-pixel region, a first green sub-pixel region and a deep blue sub-pixel region, an area of the deep blue sub-pixel region being greater than an area of the first red sub-pixel region and an area of the first green sub-pixel region;

a plurality of second pixel regions, each of the second pixel regions having three sub-pixel regions a second red sub-pixel region, a second green sub-pixel region and a sky blue sub-pixel, an area of the sky blue sub-pixel region being greater than an area of the second red sub-pixel region and an area of the second green sub-pixel region;

the first pixel regions and the second pixel regions being arranged in a matrix wherein the first and second pixel regions are alternately disposed such that the first and second pixel regions are adjacent to each other;

a plurality of first pixel units, each first pixel unit displaying an image, wherein each first pixel unit includes a first red sub-pixel region, a first green sub-pixel region and a first portion of a deep blue sub-pixel region and a first portion of an adjacent sky blue sub-pixel region;

a plurality of second pixel units, each second pixel unit displaying an image, wherein each second pixel unit includes a second red sub-pixel region, a second green sub-pixel region and a second portion of the deep blue sub-pixel region and a second portion of the adjacent sky blue sub-pixel region.

16. The device according to claim 15 , wherein each first and second red sub-pixel regions and each first and second green sub-pixel regions has a stripe shape.

17. The device according to claim 15 , wherein each second red sub-pixel region and each second green sub-pixel region has a trapezoidal shape.

18. The device according to claim 15 , wherein the deep blue sub-pixel region has a diamond shape.