Organic light emitting diode and organic light emitting display device using the same

1. An organic light emitting display apparatus, comprising:

a first electrode;

a second electrode; and

an organic layer between the first electrode and the second electrode to emit white light,

wherein the organic layer includes a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion,

wherein the organic layer is configured to emit white light having an X-axis coordinate value and a Y-axis coordinate value in a color coordinate system, and

wherein a range of fluctuation of the X-axis coordinate value at each pixel position and a range of fluctuation of the Y-axis coordinate value at each pixel position are equal to or less than 0.015.

2. The apparatus of claim 1 , wherein the Y-axis coordinate value in the color coordinate system is greater by 0.03 or more than the X-axis coordinate value in the color coordinate system.

3. The apparatus of claim 1 , wherein the X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, and the Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45.

4. The apparatus of claim 1 , wherein the first light-emitting portion is disposed on the first electrode to emit blue light, the second light-emitting portion is disposed on the first light-emitting portion to emit yellow-green light or mixed light of green and red, and the third light-emitting portion is disposed on the second light-emitting portion to emit blue light.

5. The apparatus of claim 4 , wherein the second light-emitting portion is configured to emit the green and red light, and the second light-emitting portion includes a lower light-emitting layer to emit the red light and an upper light-emitting layer to emit the green light.

6. The apparatus of claim 1 , wherein the second light-emitting portion is configured to emit the yellow-green light, and the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer.

7. The apparatus of claim 6 , wherein a concentration of a dopant of the lower light-emitting layer is greater than a concentration of a dopant of the upper light-emitting layer.

8. The apparatus of claim 1 , wherein the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer, and a first distance from a top surface of the first electrode to an interface between the lower light-emitting layer and the upper light-emitting layer is equal to or less than a second distance from a bottom surface of the second electrode to the interface between the lower light-emitting layer and the upper light-emitting layer.

9. The apparatus of claim 8 , wherein a ratio of the second distance to the first distance is in a range of 1.0 to 1.3.

10. The apparatus of claim 1 , wherein the first electrode is a transflective electrode and the second electrode is a reflective electrode.

11. An organic light emitting display apparatus, comprising:

a first electrode;

a second electrode; and

an organic layer between the first electrode and the second electrode to emit white light,

wherein the organic layer includes a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion,

wherein the organic layer is configured to emit white light having an X-axis coordinate value and a Y-axis coordinate value in a color coordinate system, and

wherein the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer, a concentration of a dopant of the lower light-emitting layer being greater than a concentration of a dopant of the upper light-emitting layer.

12. The apparatus of claim 11 , wherein the Y-axis coordinate value in the color coordinate system is greater by 0.03 or more than the X-axis coordinate value in the color coordinate system.

13. The apparatus of claim 11 , wherein the X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, and the Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45.

14. The apparatus of claim 11 , wherein a range of fluctuation of the X-axis coordinate value at each pixel position and a range of fluctuation of the Y-axis coordinate value at each pixel position are equal to or less than 0.015.

15. The apparatus of claim 11 , wherein the first light-emitting portion is disposed on the first electrode to emit blue light, the second light-emitting portion is disposed on the first light-emitting portion to emit yellow-green light or mixed light of green and red, and the third light-emitting portion is disposed on the second light-emitting portion to emit blue light.

16. The apparatus of claim 11 , wherein a first distance from a top surface of the first electrode to an interface between the lower light-emitting layer and the upper light-emitting layer is equal to or less than a second distance from a bottom surface of the second electrode to the interface between the lower light-emitting layer and the upper light-emitting layer.

17. The apparatus of claim 16 , wherein a ratio of the second distance to the first distance is in a range of 1.0 to 1.3.

18. An organic light emitting display apparatus, comprising:

a first electrode;

a second electrode;

a first light-emitting portion on the first electrode, the first light-emitting portion including a first light-emitting layer;

a second light-emitting portion on the first light-emitting portion, the second light-emitting

portion including a second light-emitting layer; and

a third light-emitting portion on the second light-emitting portion, the third light-emitting portion including a third light-emitting layer,

wherein the second light-emitting layer includes a first area and a second area, and a first distance from a top surface of the first electrode to the first area is equal to or less than a second distance from a bottom surface of the second electrode to the second area, and

wherein the first light-emitting portion, the second light-emitting portion, and the third light-emitting portion is configured to emit white light having an X-axis coordinate value and a Y-axis coordinate value in the color coordinate system, and

wherein a range of fluctuation of the X-axis coordinate value at each pixel position and a range of fluctuation of the Y-axis coordinate value at each pixel position are equal to or less than 0.015.

19. The apparatus of claim 18 , wherein the second light-emitting layer is configured to emit yellow-green light and a concentration of a dopant in the first area is greater than a concentration of a dopant in the second area.

20. The apparatus of claim 18 , wherein a ratio of the second distance to the first distance is in a range of 1.0 to 1.3.

21. The apparatus of claim 18 , wherein the Y-axis coordinate value in the color coordinate system is greater by 0.03 or more than the X-axis coordinate value in the color coordinate system.

22. The apparatus of claim 18 , wherein the X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, and the Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45.

23. The apparatus of claim 18 , wherein the first light-emitting portion is configured to emit blue light, and the second light-emitting portion is configured to emit yellow-green light or mixed light of green and red, and the third light-emitting portion is configured to emit blue light.