Lighting apparatus using organic light emitting diode
A lighting apparatus including organic light-emitting diodes comprises an anode disposed in an emission area of a substrate; first and second pad electrodes disposed on an outer side of the emission area of the substrate; a short-circuit reduction pattern surrounding an emission zone of each of pixels and formed by removing a part of the anode; a passivation layer comprising the short-circuit reduction pattern and disposed on the anode; an organic layer and a cathode disposed on the passivation layer in the emission area of the substrate; and a metal film disposed in the emission area of the substrate, wherein the short-circuit reduction pattern has a gradually-reducing resistance with an increased distance between the pixels and the first and second pad electrodes.
1. A lighting apparatus including organic light-emitting diodes comprising:
an anode disposed in an emission area of a substrate;
first and second pad electrodes disposed on an outer side of the emission area of the substrate;
a short-circuit reduction pattern surrounding an emission zone of each of pixels and formed by removing a part of the anode;
a passivation layer comprising the short-circuit reduction pattern and disposed on the anode;
an organic layer and a cathode disposed on the passivation layer in the emission area of the substrate; and
a metal film disposed in the emission area of the substrate,
wherein the short-circuit reduction pattern has a gradually-reducing resistance with an increased distance between the pixels and the first and second pad electrodes.
2. The apparatus of claim 1 , further comprising an auxiliary line disposed on the substrate.
3. The apparatus of claim 2 , wherein the anode is disposed on the substrate and the auxiliary line.
4. The apparatus of claim 2 , wherein the passivation layer is disposed on and covers the auxiliary line.
5. The apparatus of claim 1 , wherein the first pad electrode is connected to the anode, and the second pad electrode is connected to the cathode.
6. The apparatus of claim 1 , wherein the short-circuit reduction pattern functions to limit an electric current flowing to a short-circuit occurring area.
7. The apparatus of claim 1 , wherein the short-circuit reduction pattern is disposed to surround a border of the emission zone and adds the resistance to each of the pixels.
8. The apparatus of claim 7 , wherein the short-circuit reduction pattern has an open curve shape surrounding the border of the emission zone.
9. The apparatus of claim 7 , wherein the short-circuit reduction pattern vertically penetrates the anode and is filled with the passivation layer.
10. The apparatus of claim 7 , wherein the open curve of the short-circuit reduction pattern has a gradually-reducing length with the increased distance between the pixels and the first and second pad electrodes and compensates for a voltage drop.
11. The apparatus of claim 7 , wherein the open curve of the short-circuit reduction pattern has a gradually-reducing width as the increased distance between the pixels and the first and second pad electrodes and compensates for a voltage drop.
12. The apparatus of claim 1 , further comprising an insulating material, and the short-circuit reduction pattern is filled with the insulating material.
13. The apparatus of claim 12 , wherein the insulating material having a gradually-reducing resistance as the increased distance between the pixels and the first and second pad electrodes and compensates for a voltage drop.
14. A lighting apparatus using organic light-emitting diodes comprising:
an anode disposed in an emission area of a substrate;
first and second pad electrodes disposed at an outer side of the emission area of the substrate;
a short-circuit reduction pattern surrounding an emission zone of each of pixels and configured by removing a part of the anode;
a passivation layer disposed on the anode and the short-circuit reduction pattern;
an organic layer and a cathode disposed on the passivation layer in the emission area of the substrate; and
a metal film disposed in the emission area of the substrate,
wherein the short-circuit reduction pattern has different resistances varying with a distance between the pixels and the first and second pad electrodes and compensates for a voltage drop.
15. The apparatus of claim 14 , wherein the short-circuit reduction pattern has an open curve shape surrounding a border of the emission zone.
16. The apparatus of claim 15 , wherein the short-circuit reduction pattern vertically penetrates the anode and is filled with the passivation layer.
17. The apparatus of claim 15 , wherein the open curve of the short-circuit reduction pattern has a gradually-reducing length with an increased distance between the respective pixels and the first and second pad electrodes.
18. The apparatus of claim 15 , wherein the open curve of the short-circuit reduction pattern has a gradually-reducing width with an increased distance between the respective pixels and the first and second pad electrodes.
19. The apparatus of claim 14 , further comprising an insulating material, and the short-circuit reduction pattern is filled with the insulating material.
20. The apparatus of claim 19 , wherein the short-circuit reduction pattern is filled with the insulating material having a gradually-reducing resistance with an increased distance between the pixels and the first and second pad electrodes.