Sweet-spot-unit for multi-user display has matrix-shaped deflection elements, which are located between imaging means and picture matrix deflection means, which are arranged periodically in groups vertically

摘要

The sweet-spot-unit has matrix-shaped deflection elements (511,53n), which are located between imaging means and picture matrix deflection means (5), which are arranged periodically in groups (L,N,R) vertically, which correspond to the vertical lattice structure (H v) of the illumination matrix (1). Each group of deflection elements of bundle of rays deflect in another pre-determined angle in order to form these into one of several horizontally arranged sweet spot areas. The illuminating elements can be activated vertical to the corresponding groups for forming bundle of rays in every column of illumination matrix in the selected sweet spot area, over the vertical selection of active illuminating elements. Optical means for vertical enlargement (7) increases the vertical expansion of bundle of rays accordingly. A vertically scattering medium (8) is arranged before the picture matrix, in the direction of light.