Organic light emitting diode display with contamination preventing layer

1. An organic light emitting diode (OLED) display, comprising:

a substrate;

an organic light emitting diode on the substrate;

a thin film encapsulation layer encapsulating the organic light emitting diode with the substrate, and including a plurality of organic layers and a plurality of inorganic layers alternately arranged with each other;

an optical film on the thin film encapsulation layer and including an adhesive layer opposite to the thin film encapsulation layer; and

a contamination preventing layer between the thin film encapsulation layer and the adhesive layer,

wherein the contamination preventing layer directly contacts the thin film encapsulation layer and the adhesive layer, and the contamination preventing layer has a weaker adherence to the adhesive layer relative to an adherence between the thin film encapsulation layer and the adhesive layer, and

wherein one of the plurality of the inorganic layers directly contacts the contamination preventing layer.

2. The OLED display as claimed in claim 1 , wherein a surface of the contamination preventing layer contacting the adhesive layer is more hydrophobic than the thin film encapsulation layer.

3. The OLED display as claimed in claim 2 , wherein the surface of the contamination preventing layer has a contact angle of about 100 to 200 degrees with respect to water.

4. The OLED display as claimed in claim 2 , wherein the contamination preventing layer includes fluorine (F).

5. The OLED display as claimed in claim 1 , wherein the optical film includes a polarization film.

6. The OLED display as claimed in claim 1 , wherein the contamination preventing layer is hydrophobic such that the adhesive layer may be easily separated from the contamination preventing layer without damaging the thin film encapsulation layer.

7. The OLED display as claimed in claim 1 , wherein the contamination preventing layer includes siloxane.