Organic light emitting diode device

1. An organic light emitting diode (OLED) device having a plurality of pixel regions, each pixel region comprising:

a first substrate;

a first electrode on the first substrate in the pixel region, the first electrode formed of a metal being reflective;

an organic light-emitting layer on the first electrode;

a second transparent electrode on the organic light-emitting layer, the second electrode formed of a transparent conductive material;

a second transparent substrate on the second electrode; and

a transparent layer between the second transparent electrode and the second transparent substrate, the transparent layer including an inorganic material or a semiconductor material.

2. The device according to claim 1 , wherein the inorganic material is one of silicon nitride and silicon oxide.

3. The device according to claim 1 , wherein the semiconductor material is one of amorphous silicon and polycrystalline silicon.

4. The device according to claim 1 , wherein a thickness of the transparent layer is in a range between about 300 Å and about 1 μm.

5. The device according to claim 1 , wherein a thickness of the transparent layer is in a range between about 1500 Å and about 3500 Å.

6. The device according to claim 1 , wherein the first electrode is electrically connected with a thin film transistor.

7. The device according to claim 6 , wherein the transparent layer is formed on an entire surface of the second transparent substrate.

8. The device according to claim 1 , wherein the plurality of pixel regions include Red, Green and Blue pixel regions, and wherein the transparent layer is formed in each of the Red, Green and Blue pixel regions.

9. The device according to claim 1 , wherein the plurality of pixel regions include Red, Green and Blue pixel regions, and wherein the transparent layer is formed in the Blue pixel regions.

10. The device according to claim 8 , wherein a thickness of the transparent layer in at least one of the Red, Green and Blue pixel regions is different from that of the transparent layers in the other pixel regions.

11. The device according to claim 1 , wherein the transparent layer modulates a wavelength-dependent characteristic of a blue light generated from the light-emitting layer.

12. An organic light emitting diode (OLED) device having a plurality of pixel regions, each pixel region comprising:

a first transparent substrate;

a first transparent electrode on the first substrate in the pixel region, the first electrode formed of a transparent conductive material;

an organic light-emitting layer on the first transparent electrode;

a second electrode on the organic light-emitting layer, the second electrode formed of a metal being reflective;

a transparent layer between the first transparent electrode and the first transparent substrate, the transparent layer including an inorganic material or a semiconductor material; and

a thin film transistor on a second substrate, the thin film transistor being electrically connected to the second electrode.