Data input device

摘要

A data input device and method including an illuminator ( 106 ) operative to illuminate at least one engagement plane ( 102 ) by directing light along the at least one engagement plane, a two-dimensional imaging sensor ( 112 ) viewing the at least one engagement plane from a location outside the at least one engagement plane for sensing light from the illuminator ( 106 ) scattered by engagement of a data entry object ( 110 ) with the at least one engagement plane and a data entry processor receiving an output from the two-dimensional imaging sensor ( 112 ) and providing a data input to utilization circuitry.