How does a capacitive multi-touch screen capture multiple triggers?
If you are familiar with the keyboard matrix circuits, and know how it works. You can understand this kind of capacitive sensor well.



You know, in a 2-D map, any points are determined by (x,y). Points with same 'x' (or 'y') but different 'y' (or 'x') are recognized as different points.

Refs:


Combining Self- &amp; Mutual-Capacitive Sensing for Distinct User Advantages