An embodiment of an improved touch surface controller for controlling a multi-point touch surface such as a touch screen or a touch pad in a computer system is disclosed. The improved touch system controller detects signal capacitance from the pixels in the touch surface digitally, and therefore is easier...http://www.google.de/patents/US20080165134?utm_source=gb-gplus-sharePatent US20080165134 - Digital Controller for a True Multi-point Touch Surface Useable in a Computer System
