Patent ID: 8493356

Claim:
A method of detecting one or more touch events on a touch sensitive device comprising; a. receiving a plurality of channels, each channel having sensed data corresponding to the touch sensitive device; b. measuring a capacitance of each channel when no touch event is present on any of the plurality of channels, thereby determining a no touch baseline value for each channel; c. selecting one of the plurality of channels as a primary channel; d. selecting another of the plurality of channels as a references channel, wherein the reference channel is different than the primary channel; e. measuring a capacitance of the primary channel; f. measuring a capacitance of the reference channel; g. calculating a difference between the measured capacitance of the primary channel and the measured capacitance of the reference channel, thereby determining a measured difference; h. calculating a difference between the no touch baseline value for the primary channel and the no touch baseline value for the reference channel, thereby determining a baseline difference; i. calculating a difference between the measured difference and the baseline difference, thereby determining a delta from baseline for the primary channel and reference channel pair; j. repeating steps c-h for each channel in the plurality of channels so that each channel is selected as the primary channel; and k. determining one or more touch events from the delta from baselines calculated for all primary channel and reference channel pairs.