Patent ID: 8436824

Claim:
An apparatus comprising: a first conductive element of a capacitive touch sensor having at least one conductive sub-element; a second conductive element of the capacitive touch sensor having at least one conductive sub-element, the at least one conductive sub-element of the first conductive element interleaved with the at least one conductive sub-element of the second conductive element, the at least one conductive sub-element of the first conductive element and the at least one conductive sub-element of the second conductive element each having a varying width from a first end of the capacitive touch sensor to a second end of the capacitive touch sensor; and a processing device coupled with the capacitive touch sensor, the processing device configured to calculate a centroid position of a conductive object through a capacitance variation of the first conductive element and a capacitance variation of the second conductive element, wherein the calculation of the centroid position includes comparing the capacitance variation of the first conductive element with a sum of the capacitance variation of the first conductive element and the capacitance variation of the second conductive element.