Organic light emitting display device capable of preventing lift-off defects

1 . A display device comprising:

a substrate including a display area and a non-display area;

a plurality of sub-pixels on the display area of the substrate;

a light-emitting layer included in each of the plurality of sub-pixels;

an encapsulation layer covering the light-emitting layer;

a touch electrode and a buffer layer on the encapsulation layer; and

a color filter and a black matrix on the buffer layer,

wherein the black matrix includes a first layer, a second layer, and a third layer sequentially stacked vertically, and

wherein a side surface of the color filter is in contact with each of a side surface of the first layer, a portion of an upper surface of the first layer extending from the side surface of the first layer, a side surface of the second layer, and a side surface of the third layer.

2 . The display device of claim 1 , wherein a vertical level of an upper surface of the black matrix and a vertical level of an upper surface of the color filter based on an upper surface of the buffer layer are equal to each other.

3 . The display device of claim 1 , wherein the first layer contains at least one of carbon black, aniline black, lactam black, or perylene black at a content range of 25% to 40% by weight based on a total weight of the first layer.

4 . The display device of claim 1 , wherein the second layer contains at least one of carbon black, aniline black, lactam black, perylene black, or titanium dioxide at a content range of 1% to 5% by weight based on a total weight of the second layer.

5 . The display device of claim 1 , wherein the third layer contains at least one of carbon nanotubes, carbon nanorods, or silica nanotubes at a content range of 1% to 5% by weight based on a total weight of the third layer.

6 . The display device of claim 1 , wherein a width of a lower surface of the first layer is greater than a width of a lower surface of the second layer.

7 . The display device of claim 1 , wherein each of the plurality of sub-pixels includes a transistor, and the display device further comprises:

an anode electrode connected to the transistor; and

a bank having an opening that exposes the anode electrode.

8 . The display device of claim 7 , wherein the black matrix vertically overlaps the bank.

9 . The display device of claim 1 , wherein the non-display area includes a driver circuit area and a dam area.

10 . The display device of claim 1 , wherein the display device further comprises:

a planarization layer, an adhesive layer, and a cover window on the color filter and the black matrix.

11 . The display device of claim 10 , wherein the adhesive layer has a visible light transmittance in a range of 72% to 79%.

12 . A display device comprising:

a substrate including a display area and a non-display area;

a plurality of sub-pixels and a plurality of transistors on the display area of the substrate;

a light-emitting layer electrically connected to each of the plurality of transistors;

an encapsulation layer covering the light-emitting layer; and

a color filter and a black matrix on the encapsulation layer, wherein the black matrix includes a first layer, a second layer, and a third layer, and the color filter is in contact with a side surface and a portion of an upper surface of the first layer, and

wherein a thickness of the black matrix and a thickness of the color filter are equal to each other.

13 . The display device of claim 12 , wherein the first layer contains at least one of carbon black, aniline black, lactam black, or perylene black at a content range of 25% to 40% by weight based on a total weight of the first layer.

14 . The display device of claim 12 , wherein the second layer contains at least one of carbon black, aniline black, lactam black, perylene black, or titanium dioxide at a content range of 1% to 5% by weight based on a total weight of the second layer.

15 . The display device of claim 12 , wherein the third layer contains at least one of carbon nanotubes, carbon nanorods, or silica nanotubes at a content range of 1% to 5% by weight based on a total weight of the third layer.

16 . The display device of claim 12 , wherein the first layer, the second layer, and the third layer are vertically sequentially stacked.

17 . The display device of claim 12 , wherein a width of a lower surface of the first layer is greater than a width of a lower surface of the second layer.

18 . The display device of claim 12 , wherein a side surface of each of the second layer and the third layer is in contact with a side surface of the color filter.

19 . A display device comprising:

a substrate including a display area and a non-display area;

a plurality of sub-pixels on the display area of the substrate;

a light-emitting layer included in each of the plurality of sub-pixels;

an encapsulation layer covering the light-emitting layer;

a touch electrode and a buffer layer on the encapsulation layer; and

a color filter and a black matrix on the buffer layer,

wherein the black matrix includes a first layer, a second layer, and a third layer sequentially stacked vertically, and

wherein a width of a lower surface of the first layer is greater than a width of a lower surface of the second layer.

20 . A display device comprising:

a substrate including a display area and a non-display area;

a plurality of sub-pixels and a plurality of transistors on the display area of the substrate;

a light-emitting layer electrically connected to each of the plurality of transistors;

an encapsulation layer covering the light-emitting layer; and

a color filter and a black matrix on the encapsulation layer,

wherein the black matrix includes a first layer, a second layer, and a third layer, and the color filter is in contact with a side surface and a portion of an upper surface of the first layer, and

wherein a width of a lower surface of the first layer is greater than a width of a lower surface of the second layer.