Organic electroluminescent display and method of manufacturing the same
View Patent ↗An organic electroluminescent display and a method of manufacturing the same are provided. The organic electroluminescent display includes a substrate, at least a thin-film transistor, which is formed on the substrate, at least an insulation layer, which cover the thin-film transistor, first electrodes, which are formed in a predetermined pattern on a top surface of the insulation layer and to which a voltage is selectively applied through the thin-film transistor, bus electrodes, which are insulated from the first electrodes, a planarization layer, which is an insulation layer and has openings exposing the first electrodes and the bus electrodes, organic layers, which are formed on a top surface of the first electrodes, and second electrodes, which are formed on a top surface of the organic layer and a top surface of the planarization layer and are electrically connected to the bus electrodes.
1. An organic electroluminescent display comprising:
a substrate;
a thin-film transistor formed on the substrate;
an insulation layer covering the thin-film transistor;
a first electrode formed on a top surface of the insulation layer;
a bus electrode which is insulated from the first electrode;
an insulating planarization layer having an opening exposing the first electrode;
an organic layer formed on a top surface of the first electrode; and
a second electrode formed on a top surface of the organic layer and electrically connected to the bus electrode.
2. The organic electroluminescent display of claim 1 , wherein the second electrode is made of a transparent material.
3. The organic electroluminescent display of claim 1 , wherein the first electrode and the bus electrode are made of a same material.
4. The organic electroluminescent display of claim 3 , wherein the first electrode and the bus electrode are made of metal.
5. The organic electroluminescent display of claim 1 , wherein the bus electrode is formed on a top surface of the insulation layer.
6. The organic electroluminescent display of claim 1 , wherein light emitted from the organic layer is discharged in a direction of the second electrode.
7. The organic electroluminescent display of claim 1 , wherein the planarization layer further has an opening exposing the bus electrode.
8. The organic electroluminescent display of claim 1 , wherein the second electrode is disposed on a top surface of the planarization layer.
9. The organic electroluminescent display of claim 1 , wherein the second electrode is directly in contact with the bus electrode.
10. The organic electroluminescent display of claim 1 , wherein the organic layer has an electron transport layer which covers the substrate.
11. The organic electroluminescent display of claim 1 , wherein the bus electrode is formed in a predetermined pattern to reduce a line resistance of the second electrode.
12. An organic electroluminescent display comprising:
a substrate;
a plurality of thin-film transistors formed on the substrate;
a first insulation layer formed with a first surface contacting the thin-film transistors and a second surface;
a plurality of first electrodes formed on the second surface of the first insulation layer, each first electrode electrically communicating with a respective one of the plurality of thin film transistors and having a first surface contacting the first insulation layer and a second surface;
a bus electrode insulated from the first electrodes;
a second insulation layer formed to cover the first insulation layer and having a planarization surface and an opening for at least a portion of each of the plurality of first electrodes;
a plurality of organic electroluminescent emitters, each emitter having a first surface formed on the second surface of a respective first electrode and a second surface; and
a second electrode formed on the second surfaces of the organic electroluminescent emitters and electrically connected to the bus electrode.