The setup consists of a “base station,” (actually just a chip) which can either be embedded in the phone or attached as a peripheral, and a special powered stylus that relays its position to the base station.Find out more over here.
Besides enabling on-screen writing and interactive buttons, the EPOS system can also be used for drawing on regular surfaces within a certain proximity of the base station, and also act as a Jackal-style (the Bruce Willis one) joystick for playing videogames or aiming a remote-controlled machine gun.
EPOS developed Digital Stylus for phones with non-touchscreen
Posted on Monday, December 19 2005 @ 0:22 CET by Thomas De Maesschalck
Engadget reports a company named Epos will show off its Digital Stylus system at CES that allows users to write directly onto non-touchscreen cell phones.