Organic electroluminescent display device

An organic EL device comprising:

• a transparent substrate;
• a first electrode unit formed on the transparent substrate in a predetermined pattern and made of a transparent conductive material;
• an organic EL unit including organic layers having a predetermined pattern stacked on the first electrode unit;
• a second electrode unit formed on the organic EL unit including a first component made of a dielectric material and a second component made of one or more metals selected from the group consisting of iron (Fe), cobalt (Co), vanadium (V), titanium (Ti), aluminium (Al), silver (Ag) and platinum (Pt);
• and
• an encapsulation layer to encapsulate the first electrode unit, the organic EL unit and the second electrode unit.

An organic EL device comprising:

• a transparent substrate;
• an external light absorbing layer formed on the transparent substrate to absorb external light;
• a second electrode unit formed on the external light absorbing layer;
• an organic EL unit formed of organic layers having a predetermined pattern and stacked on the second electrode unit;
• and
• a first electrode unit formed on the organic EL unit in a predetermined pattern.

An organic EL device comprising:

• a substrate;
• a pixel area having anode layers formed on the substrate in a predetermined pattern, an organic EL unit having organic layers stacked on the respective anode layers, an insulating protective layer formed on the substrate to open the organic EL device, and cathode layers formed on the organic EL unit and protective layer in a predetermined pattern;
• a drive area having thin film transistors (TFTs) formed on the substrate to selectively apply a predetermined voltage to the anode layers;
• and
• an external light absorbing layer formed on the substrate to be insulated from the anode layers.

An organic EL device comprising:

• a substrate;
• a pixel area having anode layers formed on the substrate in a predetermined pattern, an organic EL unit having organic layers stacked on the respective anode layers, an insulating protective layer formed on the substrate to open the organic EL device, and cathode layers formed on the organic EL unit and protective layer in a predetermined pattern;
• and
• a drive area having thin film transistors (TFTs) formed on the substrate to selectively apply a predetermined voltage to the anode layers;
• wherein the anode layers are formed of external light absorbing layers.

An organic EL device comprising:

• a transparent substrate;
• a buffer layer formed on the transparent substrate;
• a thin film transistor (TFT) layer formed on the buffer layer;
• an intermediate insulator layer to cover the TFT layer;
• a transparent electrode layer formed on the intermediate insulator layer in a predetermined pattern and to which voltages are selectively applied by TFTs;
• an insulating protective layer having an opening to expose the transparent electrode layer;
• an organic EL unit having organic layers stacked on the transparent electrode layer;
• and
• a cathode layer formed on the organic EL unit and the insulating protective layer in a predetermined pattern;
• wherein an external light absorbing layer is formed between the intermediate insulator layer and the insulating protective layer, excluding an area corresponding to the organic EL unit.

An organic EL device comprising:

• a transparent substrate;
• a buffer layer formed on the transparent substrate;
• a thin film transistor (TFT) layer formed on the buffer layer;
• an intermediate insulator layer to cover the TFT layer;
• a transparent electrode layer formed on the intermediate insulator layer in a predetermined pattern and to which voltages are selectively applied by TFTs;
• an insulating protective layer having an opening to expose the transparent electrode layer;
• an organic EL unit having organic layers stacked on the transparent electrode layer;
• and
• a cathode layer formed on the organic EL unit and the insulating protective layer in a predetermined pattern;
• wherein the cathode layer includes a first component which is a dielectric material and a second component made of one or more metals selected from the group consisting of iron (Fe), cobalt (Co), vanadium (V), titanium (Ti), aluminium (Al), silver (Ag) and platinum (Pt).

A method of preparing an organic EL device comprising:

• preparing a transparent substrate;
• forming a first electrode unit formed on the transparent substrate in a predetermined pattern;
• forming an organic EL unit including organic layers having a predetermined pattern, stacked on the first electrode unit;
• forming a second electrode unit formed on the organic EL unit to drive the organic EL unit with the first electrode unit;
• and
• forming an encapsulation layer to encapsulate the first electrode unit, the organic EL unit and the second electrode unit, the encapsulation layer including a first component formed of a dielectric material and a second component formed of a metal, the first and second components having a gradual component concentration gradient.

An organic electroluminescent display (EL) device comprising:

• a transparent substrate;
• a first electrode unit formed on the transparent substrate in a predetermined pattern and made of a transparent conductive material;
• an organic EL unit including organic layers having a predetermined pattern stacked on the first electrode unit;
• a second electrode unit corresponding to the first electrode unit formed on the organic EL unit in a predetermined pattern;
• and
• an encapsulation layer to encapsulate the first electrode unit, the organic EL unit and the second electrode unit to protect the same, the encapsulation layer having a component concentration gradient in a direction of a thickness thereof.

An organic EL device comprising:

• a transparent substrate;
• a buffer layer formed on the transparent substrate;
• a thin film transistor (TFT) layer formed on the buffer layer;
• an intermediate insulator layer to cover the TFT layer;
• a transparent electrode layer formed on the intermediate insulator layer in a predetermined pattern and to which voltages are selectively applied by TFTs;
• an insulating protective layer having an opening to expose the transparent electrode layer;
• an organic EL unit having organic layers stacked on the transparent electrode layer;
• and
• a cathode layer formed on the organic EL unit and the insulating protective layer in a predetermined pattern;
• wherein the cathode layer has a component concentration gradient in a direction of its thickness.