DISPLAY DEVICE AND MANUFACTURING METHOD OF THE SAME

1 . A display device comprising:

a first lower electrode;

a rib including a first pixel aperture overlapping with the first lower electrode;

a partition arranged on the rib;

a first upper electrode opposed to the first lower electrode; and

a first organic layer which is located between the first lower electrode and the first upper electrode, which is in contact with the first lower electrode through the first pixel aperture, and which emits light in accordance with a potential difference between the first lower electrode and the first upper electrode,

wherein

the partition includes a lower portion having a first side surface and an upper portion protruding from the first side surface, and

the first organic layer is in contact with the first side surface.

2 . The display device of claim 1 , wherein

the lower portion is conductive, and

the first upper electrode is in contact with the first side surface.

3 . The display device of claim 1 , further comprising:

a first sealing layer continuously covering the partition and a first display element which includes the first lower electrode, the first upper electrode, and the first organic layer.

4 . The display device of claim 1 , wherein

the first organic layer includes a first layer including a hole-injection layer and a second layer covering the first layer,

the first layer is not in contact with the first side surface, and

the second layer is in contact with the first side surface.

5 . The display device of claim 1 , further comprising:

a second lower electrode overlapping with a second pixel aperture of the rib;

a second upper electrode opposed to the second lower electrode; and

a second organic layer which is located between the second lower electrode and the second upper electrode, which is in contact with the second lower electrode through the second pixel aperture, and which emits light in accordance with a potential difference between the second lower electrode and the second upper electrode, wherein

the lower portion has a second side surface, and

the second organic layer is in contact with the second side surface.

6 . The display device of claim 5 , wherein

a height of an area where the first organic layer is in contact with the first side surface is different from a height of an area where the second organic layer is in contact with the second side surface.

7 . The display device of claim 6 , wherein

the height of the area where the first organic layer is in contact with the first side surface is larger than the height of the area where the second organic layer is in contact with the second side surface.

8 . The display device of claim 5 , wherein

a width in a height direction of the partition, of an area where the first upper electrode is in contact with the first side surface is smaller than a width in the height direction, of an area where the second upper electrode is in contact with the second side surface.

9 . The display device of claim 5 , wherein

an area of the first pixel aperture is larger than an area of the second pixel aperture.

10 . The display device of claim 5 , wherein

a thickness of the first organic layer is smaller than a thickness of the second organic layer.

11 . A display device manufacturing method comprising:

forming a first lower electrode and a second lower electrode;

forming a rib including a first pixel aperture overlapping with the first lower electrode and a second pixel aperture overlapping with the second lower electrode;

forming on the rib a partition which includes a lower portion having a first side surface and a second side surface and which includes an upper portion protruding from the first side surface and the second side surface;

forming a first organic layer which is in contact with the first lower electrode and the second lower electrode through the first pixel aperture and the second pixel aperture, respectively, and which is in contact with the first side surface and the second side surface; and

forming a first upper electrode covering the first organic layer.

12 . The method of claim 11 , wherein

the lower portion is conductive, and

the first upper electrode is in contact with the first side surface and the second side surface.

13 . The method of claim 11 , further comprising:

forming a first sealing layer continuously covering the partition and a first display element which includes the first lower electrode, the first upper electrode, and the first organic layer.

14 . The method of claim 12 , comprising:

removing portions of the first upper electrode and the first organic layer, which are located above the second lower electrode and which are in contact with the second side surface, by etching;

forming a second organic layer which is in contact with the second lower electrode through the second pixel aperture; and

forming a second upper electrode covering the second organic layer.

15 . The method of claim 14 , wherein

the second upper electrode is in contact with an area of the second side surface, which is covered with the first organic layer during etching of the first upper electrode.

16 . The method of claim 14 , wherein

the second organic layer is in contact with the second side surface.

17 . The method of claim 16 , wherein

a height of an area where the first organic layer is in contact with the first side surface is different from a height of an area where the second organic layer is in contact with the second side surface.

18 . The method of claim 17 , wherein

the height of the area where the first organic layer is in contact with the first side surface is larger than the height of the area where the second organic layer is in contact with the second side surface.

19 . The method of claim 11 , wherein

an area of the first pixel aperture is larger than an area of the second pixel aperture.

20 . The method of claim 14 , wherein

a thickness of the first organic layer is smaller than a thickness of the second organic layer.