Patent ID: 7545289

Claim:
A capacitance sensing apparatus for sensing an object proximate to a sensing region, said apparatus comprising: a plurality of different-sized first sensing elements coupled to a first electrical conductor, wherein a first measure of a sensor signal output on said first electrical conductor corresponds at least in part to the size of a first sensing element proximate to said object; a plurality of different-sized second sensing elements coupled to a second electrical conductor, wherein a second measure of a sensor signal output on said second electrical conductor corresponds at least in part to the size of a second sensing element proximate to said object; and a plurality of different-sized third sensing elements coupled to a third electrical conductor, wherein a third measure of a sensor signal output on said third electrical conductor corresponds at least in part to the size of a third sensing element proximate to said object; wherein said first sensing elements, said second sensing elements and said third sensing elements are arranged stripe-like in a repeating pattern along an axis in said sensing region and wherein said first, second and third measures together indicate an unambiguous position along said axis.