US Patent 8355887 Proximity based gesturing devices, systems and methods

A device may include a plurality of sensors substantially coplanar with one another in a sensor plane, each sensor generating a sense value that varies according to a physical distance between the sensor and an object without contacting the object; and control circuits that generates at least first position values, second position values and third position values in response to the sensor values, the first and second position values identifying a position in a space adjacent to the sensor plane.