Organic light emitting display device and fabricating method of the same having organic light emitting diodes stacked in a double layer
View Patent ↗An organic light emitting display device and a method of fabricating the same are disclosed. The organic light emitting display device includes a first organic light emitting diode and a second organic light emitting diode. The first organic light emitting diode has a first electrode, a second electrode, and a first organic emission layer positioned between the first and second electrodes. The second organic light emitting diode has the second electrode, a third electrode, and a second organic emission layer positioned between the second and third electrodes. A first driver thin film transistor is connected to the first electrode. A second driver thin film transistor is connected to the second electrode.
1. An organic light emitting display device comprising:
at least one unit pixel, wherein each unit pixel comprises:
a first organic light emitting diode having a first electrode, a second electrode, and
a first organic emission layer positioned between the first and second electrodes;
a second organic light emitting diode having the second electrode, a third electrode, and a second organic emission layer positioned between the second and third electrodes;
a first driver thin film transistor connected to the first electrode;
a second driver thin film transistor connected to the second electrode; and
a source of the first driver thin film transistor and a source of the second driver thin film transistor are connected to a common power line ELVDD.
2. The organic light emitting display device according to claim 1 , further comprising a work function assistant layer positioned between the second electrode and the first organic emission layer.
3. The organic light emitting display device according to claim 1 , wherein the first electrode is one layer selected from a group consisting of an Indium Tin Oxide (ITO) layer, an Indium Zinc Oxide (IZO) layer, a Tin Oxide (TO) layer, and a Zinc Oxide (ZnO) layer.
4. The organic light emitting display device according to claim 1 , wherein the second electrode is one layer selected from a group consisting of an Indium Tin Oxide (ITO) layer, an Indium Zinc Oxide (IZO) layer, a Tin Oxide (TO) layer, and a Zinc Oxide (ZnO) layer.
5. The organic light emitting display device according to claim 4 , further comprising a work function assistant layer interposed between the second electrode and the first organic emission layer,
wherein the work function assistant layer is one layer selected from a group consisting of magnesium (Mg), an Mg alloy, silver (Ag), an Ag alloy, aluminum (Al), an Al alloy, calcium (Ca), a Ca alloy, Barium (Ba), and a Ba alloy.
6. The organic light emitting display device according to claim 1 , wherein the first electrode, the first organic emission layer, the second electrode, the second organic emission layer, and the third electrode are sequentially stacked on a substrate.
7. The organic light emitting display device according to claim 1 , wherein a gate electrode of the first driver thin film transistor and a gate electrode of the second driver thin film transistor are connected to each other, and a source electrode of the first driver thin film transistor and a source electrode of the second driver thin film transistor are connected to each other.
8. An organic light emitting display device comprising:
at least one unit pixel, wherein each unit pixel comprises:
a first electrode layer;
a first organic emission layer formed on the first electrode layer;
a second electrode layer formed on the first organic emission layer, wherein the first organic emission layer is interposed between the first and second electrodes;
a second organic emission layer formed on the second electrode layer;
a third electrode formed on the second organic emission layer, wherein the second organic emission layer is interposed between the second and third electrodes;
a first driver thin film transistors electrically connected to the first electrode layer;
a second driver thin film transistor electrically connected to the second electrode layer; and
a source of the first driver thin film transistor and a source of the second driver thin film transistor are connected to a common power line ELVDD.
9. The organic light emitting display device of claim 8 , further comprising:
a work function assist layer formed between the first organic emission layer and the second electrode layer.
10. An organic light emitting display device comprising:
a first organic light emitting diode;
a second organic light emitting diode stacked on the first organic light emitting diode;
an electrode shared by the first and second organic light emitting diodes;
a first driver thin film transistors electrically connected to the first organic light emitting diode;
a second driver thin film transistor electrically connected to the shared electrode; and
a source of the first driver thin film transistor and a source of the second driver thin film transistor are connected to a common power line ELVDD.
11. The organic light emitting display device of claim 10 , wherein the organic light emitting diodes comprise a common electrode.