METHOD AND APPARATUS FOR TOMOGRAPHIC TOUCH IMAGING AND INTERACTIVE SYSTEM USING SAME

摘要

A touch screen in the form of a panel (10) is capable of conducting signals (20) and a tomograph (30) including signal flow ports (18) is positioned adjacent the panel with the signal flow ports arrayed around the border (22) of the panel at discrete locations. Signals are introduced into the panel to pass from each discrete border location to a plurality of other discrete border locations for being detected and tomographically processed to determine if any change occurred to signals due to the panel being touched during signal passage through the panel, and therefrom determine any local area (40) on the panel where a change occurred. The tomograph computes and outputs a signal indicative of a panel touch and location, which can be shown on a display (70).