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Multi-touch (or multitouch) denotes a set of interaction techniques which allow computer users to control graphical applications with several fingers. Multi-touch consists of a touch screen (e.g., computer display, table, wall) or touchpad, as well as software that recognizes multiple simultaneous touch points, as opposed to the standard touchscreen (e.g. computer touchpad, ATM), which recognizes only one touch point[1].


Frequently used optical methods

Other methods

Optical sensors integrated into an LCD panel

Planar Systems' Active Matrix LCD with integrated Optical Touchscreen uses optical sensors interspersed among LCD pixels to sense touch.

Capacitive touch screen

The iPhone uses a capacitive method acquired from Fingerworks. This method can be costly for the hobbyist or self-builder due to the complex electronic grid needed. See: justDIY Capacitive Touch Sensing

Also see

For a larger list see the Multitouch Technologies section.


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