Patent ID: 8599164

Claim:
A method for filtering signals, suitable for a touch sensitive device, wherein the touch sensitive device comprises a plurality of contiguous sensing areas; the method comprising: configuring the plurality of contiguous sensing areas with predetermined boundaries; obtaining a touch signal from the touch sensitive device; determining when the touch signal is considered noise to be discarded, the steps of determining comprising: in a location from which the touch signal originates, determining from the plurality of sensing areas four contiguous sensing areas comprising a first sensing area, a second sensing area, a third sensing area, and a fourth sensing area wherein the second sensing area is located between the first sensing area and the third sensing area on opposite sides and another side of the second sensing area is directly adjacent to the fourth sensing area which is cornerway adjacent to the first sensing area and the third sensing area; and discarding the touch signal when the sensing areas which are sensed by the touch sensitive device comprise the first sensing area and the third sensing area and the fourth sensing area but without the second sensing area.