Observer tracking directional display

摘要

An observer tracking directional display comprises a spatial light modulator 1 associated with a movable parallax optic 2. An observer tracker 7 determines the position of an observer and controls the position of the optic 2 by means of an electromechanical transducer 8 and a mechanical transmission 9. The mechanical tracking arrangement has a plurality of stationary positions for the parallax optic 2 relative to the SLM 1 and steps between these positions so as to optimise the viewing windows for the current position of the observer. <IMAGE> <IMAGE> <IMAGE> <IMAGE>