DISPLAY DEVICE
According to one embodiment, a display device includes a base, a first insulating layer disposed on the base, a lower electrode disposed on the first insulating layer, an organic layer disposed on the lower electrode and including a light-emitting layer and an upper electrode disposed on the organic layer, and the lower electrode includes a conductive layer including a contact area disposed over an entire circumference thereof when viewed in plan view, a reflective layer disposed above the conductive layer on an inner side of the contact area, which reflects light and a transparent electrode located on the conductive layer and the reflective layer and in contact with the contact area.
1 . A display device comprising:
a base;
a first insulating layer disposed on the base;
a lower electrode disposed on the first insulating layer;
an organic layer disposed on the lower electrode and including a light-emitting layer; and
an upper electrode disposed on the organic layer, wherein
the lower electrode comprises,
a conductive layer including a contact area disposed over an entire circumference thereof when viewed in plan view,
a reflective layer disposed above the conductive layer on an inner side of the contact area, which reflects light, and
a transparent electrode located on the conductive layer and the reflective layer and in contact with the contact area.
2 . The display device of claim 1 , wherein
the reflective layer has a cross-section including an upper surface, a first inclined surface expanding downward from the upper surface, and a second inclined surface expanding downward from the upper surface and located on an opposite side to the first inclined surface, and
the first inclined surface, the second inclined surface and the upper surface are covered by the transparent electrode.
3 . The display device of claim 2 , wherein
the conductive layer has a cross-section including a third inclined surface continuous to the first inclined surface and located on an outer side of the first inclined surface and a fourth inclined surface continuous to the second inclined surface and located on an outer side of the second inclined surface, and
the third inclined surface and the fourth inclined surface are equivalent to the contact area and are in contact with the transparent electrode.
4 . The display device of claim 3 , wherein
the cross-section of the conductive layer is formed into a trapezoidal shape.
5 . The display device of claim 2 , wherein
the cross-section of the conductive layer includes a first end portion located on an outer side of the first inclined surface and a second end portion located on an outer side of the second inclined surface, and
a first upper surface of the first end portion and a second upper surface of the second end portion correspond to the contact area and are in contact with the transparent electrode.
6 . The display device of claim 5 , wherein
the cross-section of the conductive layer is formed into a rectangular shape.
7 . The display device of claim 1 , further comprising:
a second insulating layer disposed on the first insulating layer; and
a third insulating layer disposed on the first insulating layer,
wherein
the lower electrode has a cross-section including a fifth inclined surface expanding downward and a sixth inclined surface expanding downward and located on an opposite side to the fifth inclined surface,
the second insulating layer covers the fifth inclined surface, and
the third insulating layer covers the sixth inclined surface.
8 . The display device of claim 7 , wherein
the organic layer is disposed on the second insulating layer, the lower electrode and the third insulating layer.
9 . The display device of claim 1 , wherein
the organic layer covers the lower electrode.
10 . The display device of claim 1 , further comprising:
a second insulating layer disposed on the first insulating layer; and
a third insulating layer disposed on the first insulating layer,
wherein
the organic layer includes a first side portion and a second side portion located on an opposite side to the first side portion,
the second insulating layer is in contact with the first side portion, and
the third insulating layer is in contact with the second side portion.
11 . The display device of claim 10 , wherein
the upper electrode is disposed on the second insulating layer, the organic layer and the third insulating layer.
12 . The display device of claim 1 , wherein
the transparent electrode is formed of indium tin oxide, and
the reflective layer is formed of aluminum or an aluminum alloy.
13 . The display device of claim 12 , wherein
the conductive layer is formed of a metal material containing titanium.
14 . A display device comprising:
a base;
a first insulating layer disposed on the base;
a lower electrode disposed on the first insulating layer;
an organic layer disposed on the lower electrode and including a light-emitting layer; and
an upper electrode disposed on the organic layer, wherein
the lower electrode includes a conductive layer, a reflective layer disposed on the conductive layer, which reflects light, and a transparent electrode disposed on the reflective layer,
the transparent electrode is formed of indium tin oxide, and
the reflective layer is formed of Al—Ni, Al—W alloy, Al—Mo alloy, Al—Ti alloy, Al—Ni—W, Al—Ni—Mo alloy or Al—Ni—Ti alloy.
15 . The display device of claim 14 , further comprising:
a second insulating layer disposed on the first insulating layer; and
a third insulating layer disposed on the first insulating layer,
wherein
the lower electrode has a cross-section including a first side portion and a second side portion on an opposite side to the first side portion,
the second insulating layer covers the first side portion, and
the third insulating layer covers the second side portion.
16 . The display device of claim 14 , wherein
the organic layer covers the lower electrode.
17 . The display device of claim 16 , further comprising:
a second insulating layer disposed on the first insulating layer; and
a third insulating layer disposed on the first insulating layer,
wherein
the organic layer includes a first side portion and a second side portion on an opposite side to the first side portion,
the second insulating layer is in contact with the first side portion, and
the third insulating layer is in contact with the second side portion.