Methods and apparatus for virtual touchscreen computer interface controller

摘要

An interface controller for a computer or other data processor which does not require physical contact between a pointing device and the controller. Methods and apparatus are disclosed for detecting coordinates associated with the violation of a plane or field in space by a pointing device such as a user's finger, and using the detected coordinates as input for controlling a data processor such as a digital computer. The interface controller is especially useful for controlling computers in which the user is presented not with a physical interface screen such as a CRT monitor, but with a projected virtual image of the screen.