Patent ID: 8415958

Claim:
A capacitive imaging sensor device, said device comprising: a sensor substrate; a first set of sensor electrodes disposed on a first surface of said sensor substrate, wherein sensor electrodes of said first set of sensor electrodes are disposed substantially in parallel with a first axis, and wherein at least two sensor electrodes of said first set of sensor electrodes extend for different lengths along said first axis; a second set of sensor electrodes disposed on said first surface, wherein sensor electrodes of said second set of sensor electrodes are disposed substantially in parallel with said first axis, and wherein sensor electrodes of said first set and second set are disposed in a common single layer; and a processing system coupled with said first set and said second set of sensor electrodes, said processing system configured for: measuring a first capacitive coupling between a first sensor electrode of said first set of sensor electrodes and a sensor electrode of said second set of sensor electrodes; measuring a second capacitive coupling between a second sensor electrode of said first set of sensor electrodes and said sensor electrode of said second set of sensor electrodes; and determining a capacitance image using said first and second measurements of capacitive coupling.