Bending wave vibrations propagating in a substrate of a touch input device are sensed. Provision is made for discriminating between sensed vibrations propagating in the substrate indicative of an intended touch and sensed vibrations propagating in the substrate indicative of an unintended touch. In response...http://www.google.de/patents/US7176902?utm_source=gb-gplus-sharePatent US7176902 - Wake-on-touch for vibration sensing touch input devices
