A subpixel arrangement structure for a display device, including a plurality of unit pixels each having a red subpixel, a green subpixel and a blue subpixel which form a delta arrangement structure, wherein openings of the red and green subpixels of each unit pixel are substantially aligned along a direction of a column axis, wherein an opening of the blue subpixel of each until pixel are substantially aligned along the direction of the column axis or a direction of a row axis that is perpendicular to the column axis, and wherein two of the plurality of unit pixels of each pixel group, that are positioned adjacent to each other in the direction of the column axis or the direction of the row axis, share one blue subpixel with each other.