Patent ID: 7808255

Claim:
A two-dimensional position sensor comprising a substrate with a sensitive area defined by a pattern of electrodes, the pattern of electrodes including drive electrodes and sense electrodes generally extending in a first direction, hereinafter the x-direction, and interleaved in a second direction, hereinafter the y-direction, wherein the sense electrodes comprise first, second and third groups of elements shaped such that adjacent ones of the elements of the first and second groups co-extend in the x-direction over a portion of the sensitive area and adjacent ones of the elements of the second and third groups co-extend in the x-direction over another portion, and wherein the drive electrodes are arranged to capacitively couple with the sense electrodes, wherein the sensor further comprises a controller comprising a drive unit for applying drive signals to the drive electrodes, and a sense unit for measuring sense signals received from each group of the sense electrodes representing a degree of capacitive coupling of the drive signals between the drive electrodes and each group of the sense electrodes.