Display device with color filter over nonemitting reflective area
Embodiments of the present disclosure relate to a display device, and more particularly, to a display device where a difference between an area of a first opening and an area of the first emission region in the display device is greater than a difference between an area of a second opening and an area of the second emission region in the display device. As a result, reflected light is not excessively biased toward any one color on color coordinates.
1 . A display device comprising:
a first sub-pixel comprising a first light emitting area configured to emit light of a first color and a first non-light emitting area that does not emit light;
a color filter comprising a first color filter pattern that overlaps both the first light emitting area and the first non-light emitting area of the first sub-pixel; and
a black matrix comprising a first portion, a second portion, and a third portion, a first opening formed between the first portion of the black matrix and the second portion of the black matrix, a second opening smaller than the first opening formed between the second portion of the black matrix and the third portion of the black matrix, the second portion of the black matrix being between the first opening and the second opening, the first opening overlapping the first light emitting area, and the second opening overlapping the first non-light emitting area.
2 . The display device of claim 1 , wherein the first light emitting area of the first sub-pixel comprises a first pixel electrode, a first emission layer on the first pixel electrode, and a first portion of a cathode electrode on the first emission layer, and the first non-light emitting area of the first sub-pixel comprises a first auxiliary electrode and a second portion of the cathode electrode on the first auxiliary electrode but lacks any emission layer.
3 . The display device of claim 2 , wherein the first pixel electrode and the first auxiliary electrode are made of a same material.
4 . The display device of claim 2 , wherein the first pixel electrode and the first auxiliary electrode are reflective.
5 . The display device of claim 2 , wherein the first pixel electrode and the first auxiliary electrode are formed on a same layer.
6 . The display device of claim 2 , further comprising:
a bank including an opening that defines the first light emitting area of the first sub-pixel and the first emission layer is in the opening,
wherein a portion of the bank in the first non-light emitting area is disposed between the first auxiliary electrode and the second portion of the cathode electrode without any opening in the bank between the first auxiliary electrode and the second portion of the cathode electrode.
7 . The display device of claim 1 , wherein the first light emitting area of the first sub-pixel comprises a first pixel electrode, a first emission layer on the first pixel electrode, and a first portion of a cathode electrode on the first emission layer, and the first non-light emitting area of the first sub-pixel comprises a second portion of the cathode electrode and lacks any emission layer and pixel electrode.
8 . The display device of claim 7 , further comprising:
a bank including an opening that defines the first light emitting area of the first sub-pixel and the first emission layer is in the opening,
wherein a portion of the bank in the first non-light emitting area is disposed between a first auxiliary electrode and the second portion of the cathode electrode without any opening in the bank between the first auxiliary electrode and the second portion of the cathode electrode.
9 . The display device of claim 1 , further comprising:
a second sub-pixel comprising a second light emitting area configured to emit light of a second color that is different from the first color and a second non-light emitting area that does not emit light;
a third sub-pixel comprising a third light emitting area configured to emit light of a third color that is different from the first color and the second color and a third non-light emitting area that does not emit light,
wherein an area of the first light emitting area is smaller than an area of the second light emitting area and an area of the third light emitting area.
10 . The display device of claim 9 , wherein the color filter further comprises a second color filter pattern that overlaps both the second light emitting area and the second non-light emitting area of the second sub-pixel, and a third color filter pattern that overlaps both the third light emitting area and the third non-light emitting area of the third sub-pixel,
wherein the black matrix further comprises:
a third opening and a fourth opening that is smaller than the third opening, the third opening overlapping the second light emitting area, and the fourth opening overlapping the second non-light emitting area; and
a fifth opening and a sixth opening that is smaller than the fifth opening, the fifth opening overlapping the third light emitting area, and the sixth opening overlapping the third non-light emitting area.
11 . The display device of claim 10 , wherein the second light emitting area of the second sub-pixel comprises a second pixel electrode and the second non-light emitting area of the second sub-pixel comprises a second auxiliary electrode, wherein the second pixel electrode and the second auxiliary electrode are reflective,
wherein the third light emitting area of the third sub-pixel comprises a third pixel electrode and the third non-light emitting area of the third sub-pixel comprises a third auxiliary electrode, wherein the third pixel electrode and the third auxiliary electrode are reflective.
12 . The display device of claim 10 , wherein the second light emitting area of the second sub-pixel comprises a second pixel electrode and the second non-light emitting area of the second sub-pixel comprises a second portion of a cathode electrode but lacks any emission layer and pixel electrode,
wherein the third light emitting area of the third sub-pixel comprises a third pixel electrode and the third non-light emitting area of the third sub-pixel comprises a third portion of the cathode electrode but lacks any emission layer and pixel electrode.