Synaptics Incorporated
Transcapacitive sensing with consideration of capacitive couplings from non-adjacent electrodes

Abstract:

A method for capacitive sensing includes: driving, by a processing system, a first plurality of transmitter electrodes using a first plurality of basis functions, wherein the first plurality of transmitter electrodes are part of a first set of non-intersecting electrodes which are arranged adjacently to one another in a first orientation; and obtaining, by the processing system, via a first plurality of receiver electrodes of the first set of non-intersecting electrodes, a first plurality of resulting signals corresponding to the first plurality of basis functions driven onto the first plurality of transmitter electrodes. The first plurality of resulting signals includes: capacitance information for nearest-neighbor pairs of electrodes of the first set of non-intersecting electrodes; capacitance information for second nearest-neighbor pairs of electrodes of the first set of non-intersecting electrodes; and/or capacitance information for third nearest-neighbor pairs of electrodes of the first set of non-intersecting electrodes.