An image display apparatus projects a first image by using a light source constituted by a plurality of point light sources, performs lighting in a unit of lighting formed from at least one point light source of the plurality of point light sources, and controls, in the unit of lighting, lighting in an overlapped area between the first image and a second image projected from another image display apparatus so as to equalize luminances in the overlapped area and a non-overlapped area when the second image is a solid black frame.