Dispersive Signal Technology (DST) is a patented touch technology from 3M. Its primary application is in the digital signage market. While it remains a contender in the digital signage arena, it eventually may be eclipsed by infra red and optical touch.
How Dispersive Signal Technology (DST) Works:
DST uses one pane of glass with a transducer placed in each corner of the glass. When a person touches the glass, mechanical energy (bending waves) is “dispersed” from the touch location. The transducers, or sensors, detect the waves, then read them in order to triangulate the touch point.