Patent Document ID: 7932897
Application ID: 11203692
Patent Flag: 1

Claim One:
1. A touch sensitive device configured to track a finger, the device comprising: a first plurality of touch sensitive electrodes, each of the touch sensitive electrodes being associated with one of at least a first electrode group and a second electrode group; and a second plurality of sense circuits, wherein the second plurality of sense circuits is less than the first plurality of touch sensitive electrodes such that at least one sense circuit is shared between more than one of the touch sensitive electrodes; wherein each of the touch sensitive electrodes that share the at least one sense circuit are spatially separated from each other by a dispersal distance and are associated with a different one of the first and second electrode groups, wherein each of the touch sensitive electrodes is directly connected to the at least one sense circuit through a common conductor without multiplexing switches, wherein the touch sensitive electrodes are configured to enable the finger to overlap multiple adjacent electrodes and the dispersal distance is large enough to prevent the finger from overlapping the touch sensitive electrodes that share a sense circuit, wherein the plurality of sense circuits are configured to be scanned to collect a signal value corresponding to each of the plurality of sense circuits, wherein a sense circuit having a maximum signal value and first and second touch sensitive electrodes that share the sense circuit having the maximum signal value are identified, the first and second identified touch sensitive electrodes being spatially separated from each other by a dispersal distance and being associated with a different one of the first and second electrode groups, wherein one of the first and second identified touch sensitive electrodes is identified as a touched electrode by comparing a signal strength of electrodes on either side of the first identified touch sensitive electrode with a signal strength of electrodes on either side of the second identified touch sensitive electrode, and wherein a centroid of the finger being tracked is computed with reference to the touched electrode.