Patent ID: 9710113
Date: 2017-07-18
CPC Classifications: G06F

Claim:
1. A method for distinguishing between sources of simultaneous touch events on a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising: simultaneously transmitting each of a plurality of orthogonal row signals on a respective one of at least some of the plurality of row conductors; detecting an amount of each of the plurality of orthogonal row signals present on each of the plurality of column conductors; identifying the simultaneous touch events on the touch sensitive device using the detected amount of each of the plurality of orthogonal row signals, respective locations of the simultaneous touch events being determined based on the detected amount of each of the plurality of orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and associating at least two of the plurality of simultaneous touch events with a discrete source, the associating based on body-transmitted cross talk of at least one of each of the plurality of orthogonal row signals identified based on the detected amount of the at least one of each of the plurality of orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount, wherein the at least two simultaneous touch events are associated with touch events coming from a same hand of a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same hand of the same user when the detected amount is weaker than the another amount.