Display apparatus havinga structure capble of improving luminace

1 . A display apparatus, comprising:

a substrate including a first subpixel, a second subpixel, and a third subpixel;

a first electrode at each of the first, second, and third subpixels;

a first emission portion including a first light emitting layer on the first electrode;

a second emission portion including a second light emitting layer on the first emission portion;

a first charge generation layer between the first emission portion and the second emission portion;

a third emission portion including a third light emitting layer on the second emission portion;

a second charge generation layer between the second emission portion and the third emission portion; and

a second electrode on the third emission portion,

wherein the first emission portion, the second emission portion, and the third emission portion are sequentially stacked in a vertical direction between the first electrode and the second electrode,

wherein the first, second and third light emitting layers emit different color light from each other, and

wherein a distance between the first electrode and the second electrode is in a range from 310 nm to 450 nm.

2 . The display apparatus of claim 1 ,

wherein the distance between the first electrode and the second electrode is 310 nm,

wherein the first light emitting layer includes a red light emitting layer, the second light emitting layer includes a blue light emitting layer, and the third light emitting layer includes a green light emitting layer.

3 . The display apparatus of claim 2 , wherein the third light emitting layer includes the red light emitting layer, the second light emitting layer includes a green light emitting layer, and the first light emitting layer includes a blue light emitting layer.

4 . The display apparatus of claim 1 ,

wherein the distance between the first electrode and the second electrode is 310 nm,

wherein the first light emitting layer includes a red light emitting layer and a green light emitting layer on the red light emitting layer, the second light emitting layer includes a blue light emitting layer, and the third light emitting layer includes another green light emitting layer.

5 . The display apparatus of claim 1 ,

wherein the distance between the first electrode and the second electrode is 385 nm, and

wherein the first light emitting layer includes a green light emitting layer.

6 . The display apparatus of claim 5 , wherein the second light emitting layer includes a blue light emitting layer, and the third light emitting layer includes a red light emitting layer.

7 . The display apparatus of claim 5 , wherein the second light emitting layer includes a red light emitting layer, and the third light emitting layer includes a blue light emitting layer.

8 . The display apparatus of claim 1 ,

wherein the distance between the first electrode and the second electrode is 450 nm, and

wherein the first light emitting layer includes a blue light emitting layer, the second light emitting layer includes a red light emitting layer, and the third light emitting layer includes a green light emitting layer.

9 . The display apparatus of claim 8 , wherein the distance between the first electrode and the second electrode is 450 nm, and

wherein the third light emitting layer includes a blue light emitting layer, the second light emitting layer includes a green light emitting layer, and the first light emitting layer includes a red light emitting layer.

10 . The display apparatus of claim 1 , further comprising:

a reflective electrode disposed at each of the first, second and third subpixels.

11 . The display apparatus of claim 10 , further comprising:

a first layer disposed on the reflective electrode at the first subpixel and the second subpixel.

12 . The display apparatus of claim 1 , wherein the first electrode includes at least one of an oxide material and a nitride material, the oxide material having indium, zinc, tin or a combination thereof, and the nitride material having titanium, zinc, indium or a combination thereof.

13 . A display apparatus, comprising:

a substrate including a first subpixel, a second subpixel, and a third subpixel;

a reflective electrode disposed at each of the first, second, and third subpixels;

a first electrode on the reflective electrode;

a first emission portion on the first electrode and including a selected one among a red light emitting layer, a green light emitting layer, and a blue light emitting layer;

a second emission portion on the first emission portion and including a selected one among the red light emitting layer, the green light emitting layer, and the blue light emitting layer, the second emission portion being different from the first emission portion;

a third emission portion on the second emission portion and including a selected one among the red light emitting layer, the green light emitting layer, and the blue light emitting layer, the third emission portion being different from the first and second emission portions; and

a second electrode on the third emission portion,

wherein the red light emitting layer is closer to the first electrode than the blue light emitting layer, and

wherein a distance between the first electrode and the second electrode is adjusted in a range including four or fewer blue light emission portions of the blue light emitting layer.

14 . The display apparatus of claim 13 ,

wherein the distance between the first electrode and the second electrode is 310 nm,

wherein the light emitting layer in the first emission portion includes the red light emitting layer,

wherein the light emitting layer in the second emission portion includes the blue light emitting layer, and

wherein the light emitting layer in the third emission portion includes the green light emitting layer.

15 . The display apparatus of claim 13 ,

wherein the distance between the first electrode and the second electrode is 310 nm,

wherein the light emitting layer in the first emission portion includes a red light emitting layer and the green light emitting layer on the red light emitting layer,

wherein the light emitting layer in the second emission portion includes the blue light emitting layer, and

wherein the light emitting layer in the third emission portion includes the green light emitting layer.

16 . The display apparatus of claim 13 ,

wherein the distance between the first electrode and the second electrode is 385 nm,

wherein the light emitting layer in the first emission portion includes the green light emitting layer,

wherein the light emitting layer in the second emission portion includes the red light emitting layer, and

wherein the light emitting layer in the third emission portion includes the blue light emitting layer.

17 . The display apparatus of claim 13 ,

wherein the distance between the first electrode and the second electrode is 450 nm,

wherein the light emitting layer in the first emission portion includes the red light emitting layer,

wherein the light emitting layer in the second emission portion includes the green light emitting layer, and

wherein the light emitting layer in the third emission portion includes the blue light emitting layer.

18 . The display apparatus of claim 13 , further comprising:

a first charge generation layer disposed between the first emission portion and the second emission portion; and

a second charge generation layer disposed between the second emission portion and the third emission portion.

19 . A display apparatus, comprising:

a substrate including a first subpixel, a second subpixel, and a third subpixel;

a first electrode disposed at each of the first, second, and third subpixels;

a first emission portion, a second emission portion, and a third emission portion stacked on the first electrode in sequence; and

a second electrode on the third emission portions,

wherein each of the first, second and third emission portions includes a selected one among a red light emitting layer, a green light emitting layer, and a blue light emitting layer, the first emission portion being different from the second emission portion, the second emission portion being different from the third emission portion, and the third emission portion being different from the first emission portion,

wherein the blue light emitting layer is disposed between the red light emitting layer and the green light emitting layer, and

wherein a distance between the first electrode and the second electrode is adjusted in a range including three or fewer blue light emitting nodes of the blue light emitting layer.

20 . The display apparatus of claim 19 ,

wherein the distance between the first electrode and the second electrode is 310 nm,

wherein the first emission portion includes the red light emitting layer,

wherein the second emission portion includes the blue light emitting layer, and

wherein the third emission portion includes the green light emitting layer.

21 . The display apparatus of claim 19 ,

wherein the distance between the first electrode and the second electrode is 385 nm,

wherein the first emission portion includes the green light emitting layer,

wherein the second emission portion includes the blue light emitting layer, and

wherein the third emission portion includes the red light emitting layer.

22 . The display apparatus of claim 19 , further comprising:

a first charge generation layer disposed between the first emission portion and the second emission portion; and

a second charge generation layer disposed between the second emission portion and the third emission portion.

23 . A display apparatus, comprising:

a substrate including a subpixel;

a reflective electrode disposed over the subpixel;

a first electrode on the reflective electrode;

a second electrode separated vertically from the first electrode by a first distance, and separated vertically from the reflective electrode by a second distance greater than the first distance;

a first emission portion on the first electrode;

a second emission portion between the first emission portion and the second electrode;

a first charge generation layer disposed between the first emission portion and the second emission portion;

a third emission portion between the second emission portion and the second electrode; and

a second charge generation layer disposed between the second emission portion and the third emission portion,

wherein each of the first, second, and third emission portions is configured to emit light of different color from others of the first, second, and third emission portions;

wherein the reflective electrode and the second electrode implement a microcavity.