Patent ID: 8605037

Claim:
A touch sensor comprising: a first set of electrodes, the first set of electrodes arranged in at least three groupings of electrodes, each grouping of the at least three groupings of electrodes of the first set of electrodes extending along a first axis; a second set of electrodes, the second set of electrodes arranged in at least three groupings of electrodes, each grouping of the at least three groupings of electrodes of the second set of electrodes extending along a second axis different than the first axis, each electrode of the second set of electrodes arranged to have a portion thereof adjacent to a portion of each of the first set of electrodes such that the second set of electrodes is capacitively coupled to the first set of electrodes; and one or more non-transitory electronic storage media comprising code that, when executed, is configured to: cause a first drive signal to be sent to a first grouping of electrodes of the first set of electrodes; determine a first measurement associated with a first grouping of electrodes of the second set of electrodes after causing the first drive signal to be sent to the first grouping of electrodes of the first set of electrodes, the first measurement related to the first drive signal; compare the first measurement to a limit; determine that the first measurement is within the limit; in response to determining that the first measurement is within the limit, determine a second measurement associated with a second grouping of electrodes of the second set of electrodes; compare the second measurement to the limit; determine that the second measurement is outside the limit; in response to determining that the second measurement is outside the limit, determine not to measure an effect of the first drive signal on a third grouping of electrodes of the second set of electrodes; and in response to determining that the second measurement is outside the limit, cause a second drive signal to be sent to the first grouping of electrodes of the first set of electrodes.