It’s called Touche, and it utilizes a “Swept Frequency Capacitive Sensing technique that can not only detect a touch event, but also recognize complex configurations of the human hands and body.” Continue reading for a full overview and demonstration video.

Overview

Researchers from Disney and Carnegie Mellon University have developed a touch-sensitive doorknob that “could communicate all kinds of commands by touching the knob in different ways — using your pinkie and index finger, for example, might mean unlock. (An older sensor would only be able to interpret that command as “two points of entry,” rather than identifying the individual fingers.)”

[Sources 1 | 2]