The screen is based on "multi-touch sensing," which is similar to existing touch-screen interfaces but able to recognize multiple points of contact. Jeff Han also works on other projects in the fields of autonomous robot navigation, motion capture, real-time computer graphics, and human-computer interaction.
He presented his multi-touch sensing work in February 2006 at the TED (Technology Entertainment Design) Conference in Monterey, California. TED released the video online 6 months later and it spread quickly on YouTube. Han has founded a company called Perceptive Pixel <www.perceptivepixel.com> to develop his touch screen technology further, and he has already shipped touch screens to parts of the military. Han studied computer science and electrical engineering for three years at Cornell University before leaving to join a start-up company to commercialize the CU-See video-conferencing software that he helped develop while an undergraduate at Cornell.