Display device and method for manufacturing the same

1 . A display device comprising:

reference subpixels and a mixed subpixel on a substrate, the reference subpixels including at least first and second subpixels, and the mixed subpixel provided at least between the first and second subpixels;

a first electrode disposed on each of the first subpixel, the second subpixel and the mixed subpixel;

a common hole transport layer disposed on the first electrode of each of the first subpixel, the second subpixel and the mixed subpixel;

at least one functional layer disposed on the common hole transport layer of each of the first subpixel, the second subpixel and the mixed subpixel;

a second electrode disposed on the reference subpixels and the mixed subpixel;

a first charge generation layer disposed on the mixed subpixel;

a first light emitting layer emitting a first color and disposed between the at least one functional layer and the second electrode of the first subpixel and the mixed subpixel;

a second light emitting layer emitting a second color different from the first color and disposed between the at least one functional layer and the second electrode of the second subpixel and the mixed subpixel; and

a bank between the reference subpixels and between the reference subpixels and the mixed subpixel,

wherein the first charge generation layer is between the first light emitting layer and the second light emitting layer on the at least one functional layer,

wherein the mixed subpixel emits a third color different from the first color and the second color,

wherein a thickness and a number of the at least one functional layer in the second subpixel is different from a thickness and a number of the at least one functional layer in the first subpixel,

wherein a thickness and a number of the at least one functional layer in the mixed subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the second subpixel, and

wherein the bank includes a light shieldable material.

2 . The display device according to claim 1 ,

wherein the reference subpixels further comprises a third subpixel,

wherein the third subpixel includes a third light emitting layer emitting a fourth color different from the first and second colors on the at least one functional layer,

wherein the mixed subpixel includes a fourth subpixel to emit the first and second colors between the first and second subpixel, a fifth subpixel to emit the second and fourth colors between the second and third subpixels, and a sixth subpixel to emit the first and the fourth colors between the first and third subpixels,

wherein a thickness and the number of the at least one functional layer in the third subpixel is different from the thickness and the number of the at least one functional layer in the first subpixel and the second subpixel,

wherein a thickness and the number of the at least one functional layer in the fourth subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the second subpixel,

wherein a thickness and the number of the at least one functional layer in the fifth subpixel is the same as the thickness and the number of the at least one functional layer in the second subpixel or the third subpixel, and

wherein a thickness and the number of the at least one functional layer in the sixth subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the third subpixel.

3 . The display device according to claim 2 , wherein the bank is provided at a boundary of each of the first to sixth subpixels, and

wherein the bank has a thickness greater than a distance between the first and second electrodes in each subpixel.

4 . The display device according to claim 3 ,

wherein the first light emitting layer is extended to the fourth and sixth subpixels, and continuous over the first, the fourth and sixth subpixels and the bank therebetween,

wherein the second light emitting layer is extended to the fourth and fifth subpixels, and continuous over the second, the fourth and fifth subpixels and the bank therebetween, and

wherein the third light emitting layer is extended to the fifth and sixth subpixels and continuous over the third, fifth and sixth subpixels and the bank therebetween.

5 . The display device according to claim 2 , wherein the first light emitting layer has a peak wavelength in a wavelength range of 430 to 480 nm,

wherein the second light emitting layer has a peak wavelength in a wavelength range of 600 to 650 nm, and

wherein the third light emitting layer has a peak wavelength in a wavelength range of 500 to 580 nm.

6 . The display device according to claim 2 , further comprising:

a common electron transport layer disposed over the first to sixth subpixels between the third light emitting layer and the second electrode.

7 . The display device according to claim 6 , wherein the common hole transport layer extends continuously through the first to sixth subpixels, and

wherein the common electron transport layer extends continuously through the first to sixth subpixels.

8 . The display device according to claim 2 , further comprising a second charge generation layer at the fifth subpixel between the second light emitting layer and the third light emitting layer on the at least one functional layer.

9 . The display device according to claim 2 , wherein at least one of the fourth subpixel, the fifth subpixel and the sixth subpixel emits white by mixing the first color, the second color, and the third colors.

10 . A display device comprising:

reference subpixels and a mixed subpixel on a substrate, the reference subpixels including a first subpixel, a second subpixel and a third subpixel, and the mixed subpixel disposed adjacent to the first subpixel, the second subpixel and the third subpixel;

a first electrode disposed on each of the first subpixel, the second subpixel, the third subpixel and the mixed subpixel;

a common hole transport layer disposed on the first electrode of each of the first subpixel, the second subpixel and the mixed subpixel;

at least one functional layer disposed on the common hole transport layer of each of the first subpixel, the second subpixel and the mixed subpixel;

a second electrode disposed on the reference subpixels and the mixed subpixel;

a first charge generation layer disposed on the mixed subpixel;

a first light emitting layer emitting a first color and disposed between the at least one functional layer and the second electrode of the first subpixel and the mixed subpixel;

a second light emitting layer emitting a second color different from the first color and disposed between the at least one functional layer and the second electrode of the second subpixel and the mixed subpixel;

a third light emitting layer emitting a third color different from the first color and the second color, and disposed between the at least one functional layer and the second electrode of the third subpixel and the mixed subpixel; and

a bank between the reference subpixels and between the reference subpixels and the mixed subpixel,

wherein the first charge generation layer is disposed between the first light emitting layer and at least one of the second light emitting layer and the third light emitting layer on the at least one functional layer,

wherein the mixed subpixel emits a fourth color different from the first color, the second color and the third color,

wherein a thickness and a number of the at least one functional layer in the second subpixel is different from a thickness and a number of the at least one functional layer in the first subpixel,

wherein a thickness and a number of the at least one functional layer in the third subpixel is different from the thickness and the number of the at least one functional layer in the first subpixel and the second subpixel,

wherein a thickness and a number of the at least one functional layer in the mixed subpixel is the same as the thickness and the number of the at least one functional layer in one of the first subpixel, the second subpixel and the third subpixel, and

wherein the bank includes a light shieldable material.

11 . The display device according to claim 10 ,

wherein the mixed subpixel includes a fourth subpixel to emit the first and second colors between the first and second subpixel, a fifth subpixel to emit the second and third colors between the second and third subpixels, a sixth subpixel to emit the first and the third colors between the first and third subpixels, and a seventh subpixel to emit the first, the second, and the third colors adjacent to the first, the second and third subpixels,

wherein a thickness and the number of the at least one functional layer in the fourth subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the second subpixel,

wherein a thickness and the number of the at least one functional layer in the fifth subpixel is the same as the thickness and the number of the at least one functional layer in the second subpixel or the third subpixel,

wherein a thickness and the number of the at least one functional layer in the sixth subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the third subpixel, and

wherein a thickness and the number of the at least one functional layer in the seventh subpixel is the same as the thickness and the number of the at least one functional layer in one of the first subpixel, the second subpixel and the third subpixel.

12 . The display device according to claim 11 , wherein the bank is provided at a boundary of each of the first to sixth subpixels, and

wherein the bank has a thickness greater than a distance between the first and second electrodes in each subpixel.

13 . The display device according to claim 12 ,

wherein the first light emitting layer is extended to the fourth, the sixth and seventh subpixels, and continuous over the first, the fourth, the sixth and seventh subpixels and the bank therebetween,

wherein the second light emitting layer is extended to the fourth, the fifth and seventh subpixels, and continuous over the second, the fourth, the fifth and seventh subpixels and the bank therebetween, and

wherein the third light emitting layer is extended to the fifth, the sixth and seventh subpixels and continuous over the third, fifth, sixth and seventh subpixels and the bank therebetween.

14 . The display device according to claim 11 , wherein the first light emitting layer has a peak wavelength in a wavelength range of 430 to 480 nm,

wherein the second light emitting layer has a peak wavelength in a wavelength range of 600 to 650 nm, and

wherein the third light emitting layer has a peak wavelength in a wavelength range of 500 to 580 nm.

15 . The display device according to claim 11 , further comprising:

a common electron transport layer disposed over the first to seventh subpixels between the third light emitting layer and the second electrode.

16 . The display device according to claim 15 , wherein the common hole transport layer extends continuously through the first to seventh subpixels, and

wherein the common electron transport layer extends continuously through the first to seventh subpixels.

17 . The display device according to claim 11 , further comprising a second charge generation layer at the fifth subpixel between the second light emitting layer and the third light emitting layer on the at least one functional layer.

18 . The display device according to claim 11 , wherein the seventh subpixel emits white by mixing the first color, the second color, and the third colors.