Siemens Prototype Phone Keyboard

This prototype shows how a virtual keyboard can be added to a phone. Onthe upper part of the unit, a red light beams a virtual keyboard onto atable. At the bottom of the phone, a laser sweeps along the surface,looking for a finger to break the plane. With the built-in camera andlaser and with the proper calibration, it's pretty easy to type inwords and commands.

Source: esato.comAdded: 3 April 2004