A display panel comprising: a substrate (SUB) including first, second and third subpixels (SP1, SP2, SP3) each configured to emit light of a different colour from each other; an overcoat layer (OC) disposed over the substrate and having a concave area (CONC) and a convex area (CONV) connected to each other via a first inclined surface (SLO1), wherein the first inclined surface surrounds the concave area in at least two of the first, second and third subpixels, and wherein the convex area is thicker than the concave area; first, second and third anode electrodes (ANO1, ANO2, ANO3) corresponding to the first, second and third subpixels, respectively, and formed along a surface of the overcoat layer, wherein at least two of the first, second and third anode electrodes includes a second inclined surface (SL02) overlapping with the first inclined surface of the overcoat layer and wherein the second inclined surface surrounds the anode electrode portions formed on the concave area of the overcoat layer; first, second and third organic light emitting layers (EL1, EL2, EL3) disposed on the first, second and third anode electrodes, respectively; and a bank layer (BNK) disposed on the overcoat layer and including an open area overlapping the concave area of the overcoat layer in each of the first, second and third subpixels, the bank layer including a third inclined surface (SL03) overlapping with both the first inclined surface of the overcoat layer and the second inclined surface of the at least two of the first, second and third anode electrodes, wherein at least one of the first, second and third inclined surfaces is configured to reflect light emitted from a corresponding one of the first, second and third organic light emitting layers, wherein a distance d between the second inclined surface and the third inclined surface in each of the first, second and third subpixel types is different from one another, wherein the distance d is measured parallel to the substrate. a substrate (SUB) including first, second and third subpixels (SP1, SP2, SP3) each configured to emit light of a different colour from each other; an overcoat layer (OC) disposed over the substrate and having a concave area (CONC) and a convex area (CONV) connected to each other via a first inclined surface (SLO1), wherein the first inclined surface surrounds the concave area in at least two of the first, second and third subpixels, and wherein the convex area is thicker than the concave area; first, second and third anode electrodes (ANO1, ANO2, ANO3) corresponding to the first, second and third subpixels, respectively, and formed along a surface of the overcoat layer, wherein at least two of the first, second and third anode electrodes includes a second inclined surface (SL02) overlapping with the first inclined surface of the overcoat layer and wherein the second inclined surface surrounds the anode electrode portions formed on the concave area of the overcoat layer; first, second and third organic light emitting layers (EL1, EL2, EL3) disposed on the first, second and third anode electrodes, respectively; and a bank layer (BNK) disposed on the overcoat layer and including an open area overlapping the concave area of the overcoat layer in each of the first, second and third subpixels, the bank layer including a third inclined surface (SL03) overlapping with both the first inclined surface of the overcoat layer and the second inclined surface of the at least two of the first, second and third anode electrodes, wherein at least one of the first, second and third inclined surfaces is configured to reflect light emitted from a corresponding one of the first, second and third organic light emitting layers, wherein a distance d between the second inclined surface and the third inclined surface in each of the first, second and third subpixel types is different from one another, wherein the distance d is measured parallel to the substrate. <EOS>