The invention provides an array substrate and a display device, and belongs to the technical field of displaying of organic light emitting diodes. The array substrate and the display device resolve the problem that sub-pixels in different colors in an existing organic light emitting diode array substrate are different in service life. The array substrate comprises a plurality of sub-pixels with luminescent layers, the sub-pixels are equally divided into first color sub-pixels, second color sub-pixels and third color sub-pixels according to numbers, the first color sub-pixels are rhombuses, the second color sub-pixels and the third color sub-pixels are parallelograms, the length of the short sides of the parallelograms is equal to the side length of the first color sub-pixels, and the length of the long sides of the parallelograms is larger than the side length of the first color sub-pixels.