DISPLAY DEVICE
According to one embodiment, a display device includes an organic planarization film, a second electrode, a light emitting element and a metal layer. The organic planarization film is arranged on a substrate and covers a pixel circuit. The second electrode is electrically connected to a first electrode of the pixel circuit, in an area overlapping with a first contact hole formed in the organic planarization film, in planar view. The light emitting element is electrically connected to the second electrode. The metal layer is arranged between the organic planarization film and the second electrode. The metal layer is arranged on an entire surface of the organic planarization film, except for the area overlapping with the first contact hole in planar view.
1 . A display device comprising:
a substrate;
a pixel circuit arranged on the substrate;
an organic planarization film arranged on the substrate and covering the pixel circuit;
a second electrode electrically connected to a first electrode constituting the pixel circuit, in an area overlapping with a first contact hole formed in the organic planarization film, in planar view;
a light emitting element electrically connected to the second electrode; and
a metal layer arranged between the organic planarization film and the second electrode,
the metal layer being arranged on an entire surface of the organic planarization film, except for the area overlapping with the first contact hole in planar view.
2 . The display device of claim 1 , wherein
the metal layer is also arranged in an island shape on the first electrode, and
the second electrode is electrically connected to the first electrode via the metal layer arranged in the island shape.
3 . The display device of claim 1 , further comprising:
an insulating layer covering the organic planarization film and the metal layer, wherein
the second electrode is electrically connected to the first electrode, in an area overlapping with a second contact hole surrounded by the first contact hole, in planar view, the second contact hole being a contact hole formed in the insulating layer.
4 . The display device of claim 3 , wherein
a predetermined capacitor is formed between the metal layer and the second electrode opposed to each other with the insulating layer interposed therebetween.
5 . The display device of claim 1 , wherein
the metal layer is formed of a metal having a high reflectance.
6 . The display device of claim 1 , wherein
the first electrode has a three-layer stacked structure of Ti/Al/Ti,
the metal layer and the second electrode have a two-layer stacked structure of Al/Mo, and
the first electrode, the metal layer, and the second electrode overlap in the area overlapping with the first contact hole in planar view, and various metals are stacked in order of Al/Mo/Al/Mo/Ti/Al/Ti from an upper layer to a lower layer.
7 . The display device of claim 1 , wherein
the first contact hole is formed by cutting away a part of the first electrode in addition to the the organic planarization film, and
the second electrode is connected to a side surface of the first electrode in the area overlapping with the first contact hole in planar view.
8 . The display device of claim 7 , wherein
the first electrode has a three-layer stacked structure of Ti/Al/Ti,
the metal layer and the second electrode have a two-layer stacked structure of Al/Ti, and
Ti that is one of metals constituting the second electrode is connected to Ti/Al/Ti constituting the first electrode, in the area overlapping with the first contact hole in planar view.
9 . The display device of claim 1 , wherein
the pixel circuit includes a drive transistor for driving the light emitting element, and
the first electrode is a source electrode constituting the drive transistor.
10 . The display device of claim 1 , wherein
the light emitting element is a micro-LED.