Gunze Ltd exhibited a prototype of a touch screen panel that specifies a person touching it at the 11th International Nanotechnology Exhibition & Conference in Tokyo which took place from February 15 to 17, 2012.
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This is something that current multi-touch screens are incapable of discerning and although you may not necessarily see the need on small personal mobile devices, Gunze’s tech is meant for tabletop multiplayer arcade games. The Gunze prototype had a capacitive touch screen embedded in a tabletop with four electrodes located around the touch panel. In order for the touch screen to differentiate between the players around the table, each player would have to have one hand hold the electrode while the other hand touched the screen. Touching the electrode and then the touch screen panel forms a closed circuit via the human body. The prototype so far also allows users to operate the table by sitting on conductive chairs instead of having to touch an electrode with the other hand.