Gupta says his group’s method works by measuring signals that are normally given off by an LCD display and how they change when a user brings a hand near the screen. These signals show up as ...

Perceptive Pixel recently unveiled an 82-inch capacitive multitouch display, the world's largest touchscreen LCD device. Written by Tuan Nguyen, Contributor Aug. 15, 2011 at 12:18 a.m. PT ...