An embodiment of the invention discloses an array substrate with curve-shaped edges, a display panel and a display device. The array substrate comprises regular isosceles right triangle sub-pixel groups and inverted regular isosceles right triangle sub-pixel groups. The regular isosceles right triangle sub-pixel groups and the inverted regular isosceles right triangle sub-pixel groups are alternately arrayed along a first direction; the regular isosceles right triangle sub-pixel groups are sequentially arrayed along a second direction, or the inverted regular isosceles right triangle sub-pixel groups are sequentially arranged along the second direction; every two regular isosceles right triangle sub-pixel groups adjacent to each other in the second direction are adjacent to certain sub-pixel units in the corresponding inverted regular isosceles right triangle sub-pixel group which is adjacent to the two regular isosceles right triangle sub-pixel groups, and the certain sub-pixel units in each corresponding inverted regular isosceles right triangle sub-pixel group have identical colors; or every two inverted regular isosceles right triangle sub-pixel groups adjacent to each other in the second direction are adjacent to certain sub-pixel units in the corresponding regular isosceles right triangle sub-pixel group adjacent to the two inverted regular isosceles right triangle sub-pixel groups, and the certain sub-pixel units in each corresponding regular isosceles right triangle sub-pixel group have identical colors. The array substrate, the display panel and the display device in the embodiment of the invention have the advantage that a scheme which is low in algorithm complexity can be provided for improving sawteeth at the edges of the display panel.