Display device having a protrusion in a non-emission area to reduce leakage current

1. A display device, comprising:

a substrate including an emission area and a non-emission area and in which a plurality of sub-pixels is defined;

a plurality of first electrodes disposed in the plurality of sub-pixels, respectively;

a bank that is disposed in the non-emission area between the plurality of sub-pixels, the bank exposing a first electrode from the plurality of first electrodes through an opening;

a protrusion disposed at least in part in a second non-emission area of the non-emission area which is divided into a first non-emission area at a flat top surface of the bank and the second non-emission area at an inclined top surface of the bank;

an organic layer disposed on the plurality of first electrodes, the organic layer including an emission layer disposed in each of the plurality of sub-pixels and a common layer commonly disposed in the plurality of sub-pixels; and

a second electrode disposed on the organic layer,

wherein the common layer and the second electrode are disconnected from each other between adjacent sub-pixels at the protrusion.

2. The display device according to claim 1 , wherein the protrusion is disposed at least at a part of edges of the first electrode along a shape of the opening, and

the protrusion is not disposed in another part of the edges of the first electrode.

3. The display device according to claim 2 , wherein the protrusion is divided into a plurality of parts that are disconnected from each other at a part of edges of the first electrode.

4. The display device according to claim 1 , wherein the protrusion is disposed along edges of the opening, and at least one part is disposed in the first non-emission area and another part is disposed in the second non-emission area, and

wherein the other part disposed in the second non-emission area is greater in length than the at least one part of the protrusion disposed in the first non-emission area.

5. The display device according to claim 4 , wherein the protrusion disposed in the first non-emission area protrudes outwards further than the other part and forms a connection part, and

the organic layer and the second electrode are disconnected from each other between adjacent sub-pixels at the connection part.

6. The display device according to claim 1 , wherein the protrusion is disposed to overlap in part the first electrode.

7. The display device according to claim 1 , wherein the protrusion is made of a different material from the bank.

8. The display device according to claim 1 , wherein the protrusion is made of a same material as the bank and is a part of the bank.

9. A display device, comprising:

a substrate including an emission area and a non-emission area and in which a plurality of sub-pixels is defined;

a plurality of first electrodes disposed in the plurality of sub-pixels, respectively;

a bank that is disposed in the non-emission area between the plurality of sub-pixels, the bank exposing a first electrode from the plurality of first electrodes through an opening;

a protrusion disposed at least in part in a second non-emission area of the non-emission area which is divided into a first non-emission area at a flat top surface of the bank and the second non-emission area at an inclined top surface of the bank;

an organic layer disposed on the plurality of first electrodes; and

a second electrode disposed on the organic layer,

wherein the organic layer includes:

a first organic layer disposed at the opening; and

a second organic layer disposed from the first non-emission area of the bank to an upper portion of the protrusion, and

an end of the second organic layer is spaced apart from the first organic layer at one side surface of the protrusion.

10. The display device according to claim 1 , further comprising:

a spacer disposed over the bank in the first non-emission area.

11. The display device according to claim 10 , wherein the protrusion is made of a same material as the spacer.

12. The display device according to claim 1 , wherein the protrusion has a polygonal shape including a rectangular shape or a trapezoidal shape, a dome shape or a bell shape in a cross-sectional view.

13. The display device according to claim 12 , wherein the protrusion has the trapezoidal shape in a cross-sectional view and angles at ends of a lower base of the protrusion have an acute angle greater than 90°−α, and

the α is an angle between the substrate and a tangent of a top surface of the bank on which the protrusion is disposed.

14. The display device according to claim 12 , wherein the protrusion has the trapezoidal shape in a cross-sectional view and angles at ends of a lower base of the protrusion have an obtuse angle smaller than 120°.

15. The display device according to claim 1 , wherein the protrusion comprises a first protrusion disposed at least at a first edge of the first electrode along a shape of the opening and a second protrusion disposed at least at a second edge of the first electrode along the shape of the opening.

16. The display device according to claim 1 , wherein the plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel,

a plurality of first sub-pixels and a plurality of third sub-pixels are alternately disposed in a same column or in a same row, and

a plurality of second sub-pixels are disposed in a different column and in a different row from the plurality of first sub-pixels and the plurality of third sub-pixels.

17. The display device according to claim 16 , further comprising:

a dummy pattern disposed as a diagonal line between the plurality of sub-pixels,

wherein the dummy pattern is made of a same material at a same layer as the protrusion.

18. The display device according to claim 17 , wherein the protrusion and the dummy pattern are made of metals, and

the protrusion and the dummy pattern are connected to each other through a connection pattern.