Organic light-emitting diode having color distances between pixel electrodes and organic emission layers and light-emitting display apparatus comprising the same

1. An organic light-emitting display apparatus, comprising:

a first pixel electrode, a second pixel electrode, and a third pixel electrode;

an opposite electrode disposed on the first pixel electrode, the second pixel electrode, and the third pixel electrode, and the opposite electrode facing the first pixel electrode, the second pixel electrode and the third pixel electrode;

a first organic emission layer disposed for emitting a first color, the first organic emission layer between the first pixel electrode and the opposite electrode;

a second organic emission layer for emitting a second color, the second organic emission layer disposed between the second pixel electrode and the opposite electrode;

a third organic emission layer for emitting a third color, the third organic emission layer disposed between the third pixel electrode and the opposite electrode;

a first lower functional layer disposed between the first pixel electrode and the first organic emission layer;

a second lower functional layer disposed between the second electrode and the second organic emission layer;

a third lower functional layer disposed between the third pixel electrode and the third organic emission layer;

a first upper functional layer disposed between the first organic emission layer and the opposite electrode;

a second upper functional layer disposed between the second organic emission layer and the opposite electrode;

a third upper functional layer disposed between the third organic emission layer and the opposite electrode, wherein

a thickness of each of the first upper functional layer, the second upper functional layer and the third functional layer is equal to or greater than 1300 Å and less than or equal to 1800 Å, and

a ratio of a thickness of the first upper functional layer to a thickness of the first lower functional layer is different from a ratio of a thickness of the second upper functional layer to a thickness of the second lower functional layer.

2. The organic light-emitting display apparatus of claim 1 ,

wherein the first organic emission layer emits light of a first wavelength,

a distance between an upper surface of the first pixel electrode and a lower surface of the opposite electrode is a first prescribed distance in which a third resonance of the light of the first wavelength is produced, and

a distance between the upper surface of the first pixel electrode and a lower surface of the first organic emission layer is a second prescribed distance in which a second resonance of the light of the first wavelength is produced.

3. The organic light-emitting display apparatus of claim 2 , wherein:

the first organic emission layer emits red light; and

the distance between the upper surface of the first pixel electrode and the lower surface of the opposite electrode is between 3500 Å and 4800 Å.

4. The organic light-emitting display apparatus of claim 2 , wherein:

the second organic emission layer emits green light; and

a distance between an upper surface of the second pixel electrode and the lower surface of the opposite electrode is one of between 3000 Å and 4000 Å, or between 3150 Å and 3850 Å.

5. The organic light-emitting display apparatus of claim 2 , wherein:

the third organic emission layer emits blue light; and

a distance between an upper surface of the third pixel electrode and the lower surface of the opposite electrode is one of between 2500 Å and 3600 Å, or between 2750 Å and 3450 Å.

6. The organic light-emitting display apparatus of claim 1 , wherein:

the first organic emission layer emits red light, and

the thickness of the first lower functional layer is equal to or greater than 1800 Å and less than or equal to 2600 Å.

7. The organic light-emitting display apparatus of claim 6 , wherein the thickness of the first upper functional layer to the thickness of the first lower functional layer has a ratio of 1:1.2 to 1:1.4.

8. The organic light-emitting display apparatus of claim 1 , wherein the second organic emission layer emits green light, and

the thickness of the second lower functional layer is equal to or greater than 1300 Å and less than or equal to 1800 Å.

9. The organic light-emitting display apparatus of claim 8 , wherein the thickness of the second upper functional layer to the thickness of the second lower functional layer has a ratio of 1:1 to 1:1.02.

10. The organic light-emitting display apparatus of claim 1 , wherein the third organic emission layer emits blue light, and

the thickness of the third lower functional layer is equal to or greater than 1000 Å and less than or equal to 1600 Å.

11. The organic light-emitting display apparatus of claim 10 , wherein the thickness of the third upper functional layer to the thickness of the third lower functional layer has a ratio of 1:0.7 to 1:0.9.

12. The organic light-emitting display apparatus of claim 1 , wherein each of the first pixel electrode, the second pixel electrode, and the third pixel electrode includes a reflective electrode, and the opposite electrode includes a light-transmissive electrode.

13. The organic light-emitting display apparatus of claim 1 , further comprising:

a capping layer disposed on the first pixel electrode, the second pixel electrode, and the third pixel electrode.

14. The organic light-emitting display apparatus of claim 1 , wherein a distance between an upper surface of the first pixel electrode and a lower surface of the opposite electrode is a prescribed distance in which a third resonance of the light of the first wavelength is produced.

15. The organic light-emitting display apparatus of claim 14 , wherein the prescribed distance is between 3500 Å and 4800 Å.

16. An organic light-emitting diode, comprising:

a plurality of pixel electrodes including a first pixel electrode, a second pixel electrode and a third pixel electrode;

an opposite electrode disposed on the plurality of pixel electrodes and facing the plurality of pixel electrodes;

a plurality of emission layers including:

a first organic emission layer disposed between the first pixel electrode and the opposite electrode;

a second organic emission layer disposed between the second pixel electrode and the opposite electrode; and

a third organic emission layer disposed between the third pixel electrode and the opposite electrode;

a first functional layer disposed between the plurality of pixel electrodes and the plurality of organic emission layers; and

a second functional layer disposed between the plurality of organic emission layers and the opposite electrode, wherein

when the first organic emission layer emits red light and the second organic emission layer emit green light,

a thickness of a portion of the second functional layer corresponding to the first organic emission layer is between 1300 Å and 1800 Å and a thickness of a corresponding portion of the first functional layer is between 1800 Å and 2600 Å; and

a thickness of a portion of the second functional layer corresponding to the second organic emission layer is between 1300 Å and 1800 Å and a thickness of a corresponding portion of the first functional layer is between 1300 Å and 1800 Å.

17. The organic light-emitting diode of claim 16 , wherein,

when the third organic emission layer emits blue light,

a thickness of a portion of the second functional layer corresponding to the third organic emission layer is between 1300 Å and 1800 Å and a thickness of a corresponding portion of the first functional layer is between 1000 Å and 1600 Å.

18. The organic light-emitting diode of claim 16 , wherein a distance between an upper surface of the first pixel electrode and a lower surface of the opposite electrode is a prescribed distance in which a third resonance of the light of the first wavelength is produced.

19. The organic light-emitting diode of claim 18 , wherein the prescribed distance is between 3500 Å and 4800 Å.