1. In an autostereoscopic display unit the improvement which comprises (a) a flat surface screen displaying a multiplicity of regularly spaced discrete, finite light emitting sites across its surface, said screen remaining dark between said emitting sites, (b) a light valve in front of and parallel to said screen, said light valve having individual picture elements arranged in a grid pattern across its surface, there being a vertical column of individual picture elements for each light emitting site, said light emitting site being located behind said element, and (c) a mask comprised of alternating opaque and transparent to light sections, there being one transparent and one opaque section so situated in front of each individual picture element of said light valve whereby due to parallax effect a viewer's right eye can only perceive the light emitting lines through the transparent regions on alternate rows of individual picture elements and a viewer's left eye can only perceive the light emitting lines through the transparent regions on the remaining rows of individual picture elements.