Display device
According to one embodiment, a display device includes a base, a driving transistor placed on the base, a first insulating layer placed on the driving transistor, a cathode electrode placed on the first insulating layer, an organic layer including a light-emitting layer placed on the cathode electrode, an anode electrode that covers the organic layer, a second insulating layer placed on the first insulating layer and having an opening superposed on the cathode electrode, and a barrier wall placed on the second insulating layer. The anode electrode is electrically connected to the driving transistor through a first contact hole formed in the first insulating layer and the second insulating layer.
1. A display device comprising:
a base;
a driving transistor placed on the base;
a first insulating layer placed on the driving transistor;
a cathode electrode placed on the first insulating layer;
an organic layer including a light-emitting layer placed on the cathode electrode;
an anode electrode that covers the organic layer;
a second insulating layer placed on the first insulating layer and having an opening superposed on the cathode electrode; and
a barrier wall placed on the second insulating layer,
wherein the anode electrode is electrically connected to the driving transistor through a first contact hole formed in the first insulating layer and the second insulating layer.
2. The display device of claim 1 , wherein the barrier wall is so shaped that an upper portion thereof is wider than a lower portion thereof.
3. The display device of claim 2 , wherein the barrier wall has a shape that is symmetrical with regard to a normal direction of a main surface of the base.
4. The display device of claim 2 , wherein the barrier wall has a shape that is asymmetrical with regard to a normal direction of a main surface of the base.
5. The display device of claim 1 , wherein:
the anode electrode is connected to a connection electrode placed to surround the organic layer in planar view; and
the connection electrode is connected to the driving transistor through the first contact hole.
6. The display device of claim 5 , wherein the organic layer is in noncontact with the connection electrode.
7. The display device of claim 1 , wherein the cathode electrode is connected to a line that applies a voltage to the cathode electrode through a second contact hole formed in the first insulating layer superposed on a surrounding area where no pixels are arranged.
8. The display device of claim 1 , wherein the cathode electrode is connected to a line that applies a voltage to the cathode electrode through a third contact hole formed in the first insulating layer superposed on a display area where pixels are arranged.
9. The display device of claim 1 , further comprising an insulating member that covers an end portion of the cathode electrode which is opposed to the first contact hole.
10. The display device of claim 1 , further comprising an insulating member that covers an inner surface of the first contact hole.
11. The display device of claim 1 , wherein:
the cathode electrode is placed on the first insulating layer and the anode electrode covers the organic layer in an area superposed on a first pixel; and
the anode electrode is placed on the first insulating layer and the cathode electrode covers the organic layer in an area superposed on a second pixel other than the first pixel.
12. The display device of claim 11 , wherein:
a first voltage is applied to the cathode electrode placed on the first insulating layer in the area superposed on the first pixel; and
a second voltage is applied to the cathode electrode covering the organic layer in the area superposed on the second pixel.
13. The display device of claim 11 , wherein the organic layer placed in the area superposed on the first pixel and the organic layer placed in the area superposed on the second pixel include light-emitting layers that emit light of a same color.
14. The display device of claim 11 , wherein the organic layer placed in the area superposed on the first pixel and the organic layer placed in the area superposed on the second pixel include light-emitting layers that emit light of different colors.
15. A display device comprising:
a base;
a driving transistor placed on the base;
a first insulating layer placed on the driving transistor;
a cathode electrode placed on the first insulating layer;
an organic layer including a light-emitting layer placed on the cathode electrode;
an anode electrode that covers the organic layer; and
a second insulating layer placed on the first insulating layer and having an opening superposed on the cathode electrode,
wherein the anode electrode is electrically connected to the driving transistor through a contact hole formed in the first insulating layer and the second insulating layer.