Patent ID: 8502787
Filing Date: 2013-08-06
Classification: G06F

Abstract:
1. A method for distinguishing intended user input from unintended user interaction with a touchpad comprising: receiving a touch sensor signal from the touchpad indicating points of contact between sensors of the touchpad and a user, wherein a point of contact is a location of a sensor on the touchpad that is in contact with the user; identifying points of contact corresponding to at least one of the user's finger and points of contact corresponding to at least one of a user's thumb and a user's palm based on the touch sensor signal and a model of a hand; and identifying intended user input from the touch sensor signal wherein the intended user input corresponds to a portion of the touch sensor signal originating from the points of contact corresponding to a user's finger, wherein the step of identifying intended user input includes (1) calculating a global shift indicating a shift of a majority of the user's hand with respect to the touchpad, (2) using a sensor to generate data indicating movement of the touchpad and (3) correlating the calculated global shift with said data indicating movement to generate a refined global shift, and then (4) using said refined global shift to filter out the effect of touch sensor signals associated with at least one of global shift and device movement.