Organic electroluminescent display device comprising moisture preventing sealing structure

1. An organic electroluminescent display (OELD) device, comprising:

first and second substrates facing each other and including a display region and a non-display region on a periphery of the display region;

an organic electroluminescent diode in the display region of the first substrate;

a protrusion formed, with a first thickness and a first width, in the non-display region of the first substrate;

a groove formed, with a first depth and a second width, in the non-display region of the second substrate, wherein a top portion of the protrusion is inserted into the groove;

a first metal pattern covering an inner surface of a bottom portion of the protrusion;

a second metal pattern covering an outer surface of the bottom portion of the protrusion; and

a seal pattern formed between the protrusion and the groove.

2. An organic electroluminescent display (OELD) device, comprising:

first and second substrates facing each other and including a display region and a non-display region on a periphery of the display region;

an organic electroluminescent diode in the display region of the second substrate;

a protrusion formed, with a first thickness and a first width, in the non-display region of the first substrate;

a groove formed, with a first depth and a second width, in the non-display region of the second substrate, wherein a top portion of the protrusion is inserted into the groove;

a first metal pattern covering an inner surface of a bottom portion of the protrusion;

a second metal pattern covering an outer surface of the bottom portion of the protrusion; and

a seal pattern formed between the protrusion and the groove.

3. The OELD device according to claim 1 , wherein the first thickness is greater than the first depth and the first width is less than the second width.

4. The OELD device according to claim 1 , wherein the organic electroluminescent diode includes a first electrode, a second electrode, and an organic luminescent layer interposed between the first and second electrodes.

5. The OELD device according to claim 1 , further comprising a thin film transistor formed in the display region of the first substrate between the first substrate and the organic electroluminescent diode, wherein the thin film transistor includes a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode and a drain electrode.

6. The OELD device according to claim 5 , further comprising a passivation layer including a drain contact hole formed between the thin film transistor and the organic electroluminescent diode, wherein the drain contact hole exposes the drain electrode of the thin film transistor, and the organic electroluminescent diode contacts the drain electrode through the drain contact hole.

7. The OELD device according to claim 6 , wherein the protrusion is formed on the passivation layer and includes a same material as the passivation layer.

8. The OELD device according to claim 2 , wherein the first thickness is greater than the first depth, and the first width is less than the second width.

9. The OELD device according to claim 2 , wherein the organic electroluminescent diode includes a first electrode, a second electrode, and an organic luminescent layer interposed between the first and second electrodes.

10. The OELD device according to claim 2 , further comprising a thin film transistor and a connection electrode that are formed in the display region of the first substrate, wherein the thin film transistor is arranged between the first substrate and the connection electrode, the thin film transistor includes a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode and a drain electrode, and the organic electrode luminescent diode is electrically connected to the thin film transistor through the connection electrode.

11. The OELD device according to claim 10 , further comprising a passivation layer that includes a drain contact hole and is formed on the thin film transistor, wherein the drain contact hole exposes the drain electrode of the thin film transistor and the connection electrode contacts the drain electrode through the drain contact hole.

12. The OELD device according to claim 11 , wherein the protrusion is formed on the passivation layer and includes a same material as the passivation layer.