A display device, comprising: a substrate (SUB) comprising a display region (DA) and non-display region (NDA); at least one pixel (PXL) disposed in the display region (DA), wherein the at least one pixel (PXL) comprises an emission region (EMA) that emits a light, a non-emission region (NEMA) that does not emit the light, a light emitting element (OLED) disposed in the emission region (EMA), and a pixel circuit that drives the light emitting element (OLED); a passivation layer (PSV) disposed between the pixel circuit and the light emitting element (OLED), wherein the passivation layer (PSV) covers the pixel circuit and comprises a concave pattern (CP) disposed in the non-emission region (NEMA), wherein the concave pattern (CP) has a recessed shape in a direction from the upper surface of the passivation layer (PSV) toward the lower surface of the passivation layer (PSV); and a power supply line (PL2) disposed on the passivation layer (PSV) in the non-emission region (NEMA) and connected to the light emitting element (OLED), wherein the power supply line (PL2) is light reflective and comprises an uneven pattern (RP) corresponding to the concave pattern (CP) characterized in that the concave pattern (CP) comprises a plurality of concave portions and light incident on the display device from outside is irregularly reflected by the uneven pattern (RP) of the power supply line (PL2) in the non-emission region (NEMA), wherein irregular reflection of an external light generated in the non-emission region (NEMA) is canceled by destructive interference with reflection of an external light generated in the emission region (EMA). a substrate (SUB) comprising a display region (DA) and non-display region (NDA); at least one pixel (PXL) disposed in the display region (DA), wherein the at least one pixel (PXL) comprises an emission region (EMA) that emits a light, a non-emission region (NEMA) that does not emit the light, a light emitting element (OLED) disposed in the emission region (EMA), and a pixel circuit that drives the light emitting element (OLED); a passivation layer (PSV) disposed between the pixel circuit and the light emitting element (OLED), wherein the passivation layer (PSV) covers the pixel circuit and comprises a concave pattern (CP) disposed in the non-emission region (NEMA), wherein the concave pattern (CP) has a recessed shape in a direction from the upper surface of the passivation layer (PSV) toward the lower surface of the passivation layer (PSV); and a power supply line (PL2) disposed on the passivation layer (PSV) in the non-emission region (NEMA) and connected to the light emitting element (OLED), wherein the power supply line (PL2) is light reflective and comprises an uneven pattern (RP) corresponding to the concave pattern (CP) characterized in that the concave pattern (CP) comprises a plurality of concave portions and light incident on the display device from outside is irregularly reflected by the uneven pattern (RP) of the power supply line (PL2) in the non-emission region (NEMA), wherein irregular reflection of an external light generated in the non-emission region (NEMA) is canceled by destructive interference with reflection of an external light generated in the emission region (EMA). <EOS>