Organic light emitting diode display

1. An organic light emitting diode display, comprising:

a substrate;

a wiring unit positioned on the substrate;

an organic light emitting diode positioned on the wiring unit;

a metal layer positioned on the organic light emitting diode and having a lower thermal expansion coefficient than a thermal expansion coefficient of the substrate;

an adhesive layer positioned between the organic light emitting diode and the metal layer; and

a resin layer positioned on the metal layer to reinforce a strength of the metal layer,

wherein the resin layer has a higher thermal expansion coefficient than the substrate and the metal layer,

wherein: the organic light emitting diode display satisfies the following equation:

[{ E 2 *t 2*( a 3 −a 2)}/{ E 1*( a 1 −a 3)}]*0.5 ≤t 1 ≤[{E 2 *t 2*( a 3 −a 2)}]/[{ E 1*( a 1 −a 3)}]*1.5

where, t 1 is a thickness of the resin layer, a 1 is the thermal expansion coefficient of the resin layer, E 1 is an elastic coefficient of the resin layer, t 2 is a thickness of the metal layer, a 2 is the thermal expansion coefficient of the metal layer, E 2 is an elastic coefficient of the metal layer, and a 3 is the thermal expansion coefficient of the substrate, and

wherein the organic light emitting diode contacts the adhesive layer, the adhesive layer contacts the metal layer, and the metal layer contacts the resin layer in a region where the wiring unit, the organic light emitting diode, the adhesive layer, the metal layer, and the resin layer overlap one another in a direction perpendicular to the substrate.

2. The organic light emitting diode display of claim 1 , wherein: the adhesive layer contacts the metal layer along the entire length of the metal layer.

3. The organic light emitting diode display of claim 1 , wherein: the substrate comprises glass and the metal layer comprises nickel and iron.

4. The organic light emitting diode display of claim 3 , wherein: the thermal expansion coefficient of the substrate is about 3.8 ppm/° C., the elastic coefficient of the substrate is about 73000 Mpa, and a thickness of the substrate is in the range of about 0.7 mm to about 1.1 mm.

5. The organic light emitting diode display of claim 4 , wherein: the thermal expansion coefficient of the metal layer is about 0.6 ppm/° C., the elastic coefficient of the metal layer is about 140000 Mpa, and the thickness of the metal layer is in the range of about 0.05 mm to about 0.1 mm.

6. The organic light emitting diode display of claim 3 , wherein: the resin layer includes at least one of glass fiber reinforced plastic (FRP), polyethyleneterephthalate (PET), and polymethylmethacrylate (PMMA).

7. The organic light emitting diode display of claim 6 , wherein: the thermal expansion coefficient of the resin layer is between about 30 to about 60 ppm/° C., the elastic coefficient of the resin layer is between about 3300 Mpa to about 11000 Mpa, and the thickness of the resin layer is in the range of about 0.05 mm to about 0.1 mm.

8. The organic light emitting diode display of claim 1 , wherein: the adhesive layer is configured to bond and seal the substrate and the metal layer with each other.

9. The organic light emitting diode display of claim 8 , wherein: the adhesive layer comprises a thermosetting resin.

10. The organic light emitting diode display of claim 1 , wherein a thickness of the substrate is in the range of about 0.7 mm to about 1.1 mm, the thickness of the metal layer is in the range of about 0.05 mm to about 0.1 mm, and the thickness of the resin layer is in the range of about 0.05 mm to about 0.1 mm.