The use of one or more proximity sensors alone or in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the sensor outputs is...http://www.google.de/patents/US20080297487?utm_source=gb-gplus-sharePatent US20080297487 - DISPLAY INTEGRATED PHOTODIODE MATRIX
