OLED with a rib and a partition between subpixels
According to one embodiment, a display device includes a substrate, an insulating layer, a lower electrode, a rib including an aperture and covering a periphery of the lower electrode, a partition above the rib, an upper electrode being in contact with the partition, and an organic layer between the electrodes. The organic layer includes a first organic layer that is in contact with the lower electrode through the aperture, and a second organic layer on the partition. At least a part of the periphery of the lower electrode is located between the insulating layer and the partition in a thickness direction of the insulating layer.
1 . A display device comprising:
a substrate;
an insulating layer arranged above the substrate;
a lower electrode arranged above the insulating layer;
a rib formed of an inorganic material, including an aperture which overlaps with the lower electrode, and covering a periphery of the lower electrode;
a partition arranged above the rib;
an upper electrode opposed to the lower electrode and being in contact with the partition; and
an organic layer located between the lower electrode and the upper electrode to emit light in accordance with a potential difference between the lower electrode and the upper electrode,
the organic layer including a first organic layer that is in contact with the lower electrode through the aperture, and a second organic layer located on the partition and separated from the first organic layer,
at least a part of the periphery of the lower electrode being located between the insulating layer and the partition in a thickness direction of the insulating layer,
the partition including a lower portion arranged on the rib, and an upper portion which is arranged on the lower portion and which includes an end part protruding from a side surface of the lower portion, and
the second organic layer being arranged on the upper portion.
2 . The display device of claim 1 , further comprising:
a pixel circuit arranged between the substrate and the insulating layer, wherein
the insulating layer includes a contact hole which overlaps with the partition in planar view, and
the lower electrode is connected to the pixel circuit through the contact hole.
3 . The display device of claim 2 , wherein
the periphery of the lower electrode has a first side extending in a first direction, and
the first side is located between the aperture and the contact hole in a second direction intersecting the first direction.
4 . The display device of claim 3 , wherein
at least a part of the first side is located between the insulating layer and the partition in the thickness direction.
5 . The display device of claim 3 , wherein
the lower electrode includes a first protrusion that protrudes toward the contact hole in planar view, and
at least a part of the first protrusion is located between the insulating layer and the partition in the thickness direction.
6 . The display device of claim 5 , wherein
a width of the first protrusion in the first direction is one third or more of a width of the lower electrode in the first direction.
7 . The display device of claim 3 , wherein
the partition includes a second protrusion that protrudes toward the aperture in planar view, and
at least a part of the first side is located between the insulating layer and the second protrusion in the thickness direction.
8 . The display device of claim 7 , wherein
a width in the first direction of a portion of the lower electrode, which is located between the insulating layer and the second protrusion, is one third or more of a width of the lower electrode in the first direction.
9 . The display device of claim 3 , wherein
the lower electrode has a second side located on a side opposite to the first side in the second direction, and
the second side is located between the aperture and the partition in the second direction.
10 . The display device of claim 1 , wherein
at least a part of the periphery of the lower electrode is located between the insulating layer and the lower portion in the thickness direction.
11 . The display device of claim 1 , wherein
the upper electrode includes a first upper electrode covering the first organic layer, and a second upper electrode that covers the second organic layer and that is separated from the first upper electrode, and
the first upper electrode is in contact with the side surface.
12 . The display device of claim 11 , wherein
the lower portion is conductive.
13 . The display device of claim 11 , further comprising:
a sealing layer formed of an inorganic material to cover the first upper electrode, the side surface, and the second upper electrode.
14 . The display device of claim 1 , wherein
the partition surrounds the aperture in planar view.
15 . The display device of claim 1 , wherein
the second organic layer surrounds the aperture in planar view.
16 . The display device of claim 1 , wherein
a thickness of the rib is smaller than a thickness of the partition.
17 . The display device of claim 1 , comprising:
a first sub-pixel, a second sub-pixel, and a third sub-pixel each including the lower electrode, the upper electrode, the organic layer, and the aperture, wherein
the first sub-pixel and the third sub-pixel are arranged in a first direction,
the first sub-pixel and the second sub-pixel are arranged in a second direction intersecting the first direction, and
the partition includes a first partition arranged between the aperture of the first sub-pixel and the aperture of the second sub-pixel, and a second partition arranged between the aperture of the first sub-pixel and the aperture of the third sub-pixel.
18 . The display device of claim 17 , wherein
a width of the first partition in the second direction is larger than a width of the second partition in the first direction.
19 . The display device of claim 17 , wherein
at least a part of a periphery of the lower electrode of the first sub-pixel, and at least a part of a periphery of the lower electrode of the second sub-pixel are located between the insulating layer and the first partition in the thickness direction.
20 . A display device comprising:
a substrate;
an insulating layer arranged above the substrate;
a pixel circuit arranged between the substrate and the insulating layer;
a lower electrode arranged above the insulating layer;
a rib formed of an inorganic material, including an aperture which overlaps with the lower electrode, and covering a periphery of the lower electrode;
a partition arranged above the rib;
an upper electrode opposed to the lower electrode and being in contact with the partition; and
an organic layer located between the lower electrode and the upper electrode to emit light in accordance with a potential difference between the lower electrode and the upper electrode,
the organic layer including a first organic layer that is in contact with the lower electrode through the aperture, and a second organic layer located on the partition and separated from the first organic layer,
at least a part of the periphery of the lower electrode being located between the insulating layer and the partition in a thickness direction of the insulating layer,
the insulating layer including a contact hole which overlaps with the partition in planar view,
the lower electrode being connected to the pixel circuit through the contact hole,
the periphery of the lower electrode having a first side extending in a first direction,
the first side being located between the aperture and the contact hole in a second direction intersecting the first direction,
the lower electrode including a first protrusion that protrudes toward the contact hole in planar view, and
at least a part of the first protrusion being located between the insulating layer and the partition in the thickness direction.