Autostereoscopic screen and method for the simultaneous reproduction of more than two different pictures

An autostereoscopic screen for the simultaneous reproduction of more than two different pictures, comprising a pixel matrix with a multitude of pixels, an optical element arranged in front of or behind the pixel matrix and a control unit for activating the pixel matrix,

• wherein the pixels of the pixel matrix are arranged in a multitude of parallel strips of pixels, the strips being vertical or inclined with respect to the vertical,
• wherein the optical element forms an optical grid with a family of strip-like structures running equidistantly next to one another and parallel to the strips, said grid in each case setting a defined propagation direction for the light departing from or transmitted by the pixels,
• wherein the control unit is configured to activate the pixel matrix in dependence on picture information of a plurality of stereoscopic half-pictures, such that each of these half-pictures is reproduced in each case on one of a corresponding number of subsets of pixels wherein each of these subsets is formed by a family of bands of pixels which are formed in each case by one or more of the strips, wherein the bands of the different subsets cyclically alternate in the horizontal direction, so that each of the stereoscopic half-pictures is visible at a viewing distance (Ln, L;
• L′) in front of the screen, in each case from one of several laterally offset viewing zones, wherein a period length of the optical grid which is defined by a lateral offset of adjacent, strip-like structures, is changeable by way of activation of the optical element, wherein the optical element is activatable by the control unit, and the control unit is configured to carry out the following steps for a change of the viewing distance:
• enlarging or reducing the period length of the optical grid and
• redefining the mentioned subsets in a manner such that a width or an average width of the bands of pixels which form the subsets is changed by at least a width of one of the mentioned strips,
• so that a relative change of a lateral offset of the adjacent viewing zones is smaller than a relative change of the viewing distance, wherein the control unit is configured to increase the width of the bands forming the subsets for reducing the viewing distance and to reduce the width of the bands for increasing the viewing distance.