1. A computer-readable medium having instructions stored thereon, wherein if the instructions are executed by at least one device, the instructions are operable to: illuminate an electrically addressed spatial light modulator with coherent light; display a computer generated hologram (CGH) image on the electrically addressed spatial light modulator (EASLM) so as to diffract light therefrom to produce a two dimensional image at a display surface; sub-divide the two dimensional image into a number of adjacent blocks, wherein each of the adjacent blocks is associated with a different region of the display surface; and direct light diffracted by the electrically addressed spatial light modulator to sequentially write the blocks to the display surface.