a first step, in which the first sensing electrode switches, the second sensing electrode switches, the third sensing electrode switches, and the coupling electrode switches are turned on, and {HEAD ~ a voltage V1} is applied to {TAIL ~ the first and second voltage sources} 
is applied to
a first step , in which the first sensing electrode switches , the second sensing electrode switches , the third sensing electrode switches , and the coupling electrode switches are turned on , and { HEAD ~ a voltage V1 } is applied to { TAIL ~ the first and second voltage sources }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL