Display device having a dam structure with protrusions in a surrounding area and manufacturing method thereof
According to one embodiment, a display device includes a substrate, a lower electrode in a display area, a rib including an aperture, a partition on the rib, a thin film including an upper electrode and an organic layer, a first sealing layer covering the thin film and the partition, a second sealing layer on the first sealing layer, and a dam structure including protrusions provided in a surrounding area between an end portion of the substrate and the display area. An end portion of the thin film is located between the dam structure and the display area. The second sealing layer covers the end portion of the thin film and covers at least part of the dam structure.
1 . A display device comprising:
a substrate;
a lower electrode provided above the substrate in a display area including a pixel;
a rib comprising an aperture overlapping the lower electrode;
a partition provided on the rib in the display area;
a thin film including an upper electrode which faces the lower electrode, and an organic layer which emits light based on a potential difference between the lower electrode and the upper electrode;
a first sealing layer formed of an inorganic material and covering the thin film and the partition;
a second sealing layer formed of an inorganic material and provided on the first sealing layer;
a first resin layer provided on the second sealing layer;
a third sealing layer formed of an inorganic material and provided on the first resin laver;
a second resin layer provided on the third sealing layer; and
a dam structure including a plurality of protrusions provided in a surrounding area between an end portion of the substrate and the display area, wherein
the thin film is provided in the display area and the surrounding area,
an end portion of the thin film in the surrounding area is located between the dam structure and the display area,
the second sealing layer covers the end portion of the thin film and covers at least part of the dam structure,
the end portion of the thin film overlaps the first resin layer in a thickness direction of the substrate,
an end portion of the first resin layer is covered with the second sealing layer and the third sealing laver, and
positions of end portions of the second sealing layer, the third sealing layer and the second resin layer are aligned with each other.
2 . The display device of claim 1 , wherein
the third sealing layer is in contact with, of the second sealing layer, a portion which covers the dam structure.
3 . The display device of claim 1 , wherein
the dam structure surrounds the display area.
4 . A display device comprising:
a substrate;
a lower electrode provided above the substrate in a display area including a pixel;
a rib comprising an aperture overlapping the lower electrode;
a partition provided on the rib in the display area;
a thin film including an upper electrode which faces the lower electrode, and an organic layer which emits light based on a potential difference between the lower electrode and the upper electrode;
a first sealing layer formed of an inorganic material and covering the thin film and the partition;
a second sealing layer formed of an inorganic material and provided on the first sealing laver;
a dam structure including a plurality of protrusions provided in a surrounding area between an end portion of the substrate and the display area; and
a conductive layer provided in the surrounding area and covered with the thin film, wherein
the thin film is provided in the display area and the surrounding area,
an end portion of the thin film in the surrounding area is located between the dam structure and the display area,
the second sealing layer covers the end portion of the thin film and covers at least part of the dam structure, and
each of the partition and the conductive layer comprises a conductive lower portion and an upper portion protruding from a side surface of the lower portion.
5 . The display device of claim 4 , wherein
the end portion of the thin film is located between an end portion of the conductive layer and the dam structure, and
the thin film is divided by the end portion of the conductive layer.
6 . The display device of claim 4 , wherein
the end portion of the thin film is located between an end portion of the conductive layer and the display area.
7 . The display device of claim 4 , further comprising a feed line provided in the surrounding area, wherein
the conductive layer is electrically connected to the feed line and the partition.
8 . The display device of claim 7 , wherein
the upper electrode is in contact with the partition, and
the feed line applies common voltage to the upper electrode via the conductive layer and the partition.
9 . The display device of claim 8 , wherein
the protrusion includes a first organic insulating layer and a second organic insulating layer which covers the first organic insulating layer.
10 . The display device of claim 9 , wherein
the feed line includes a first portion and a second portion each formed of a metal material, and
the first organic insulating layer is located between the first portion and the second portion in a thickness direction of the substrate.
11 . The display device of claim 1 , further comprising a line provided between two adjacent protrusions of the plurality of protrusions, and
the line is covered with the second sealing layer.