Graduated routing for electrodes coupled to touch sensor electrodes

摘要

A system and method for balancing the capacitive charge on touch sensor electrodes so that every two adjacent routes have the same capacitance as any other adjacent two routes, wherein routing electrodes are spaced further and further apart, or graduated, as they get longer, to thereby balance the capacitance on the touch sensor electrodes without having to add or subtract an offset from each touch sensor electrode.

主权项

1. A method for reducing parasitic capacitance on electrodes of a touch sensor, said method comprising:
1) providing a touch sensor having at least one touch sensor circuit, a plurality of touch sensor electrodes, and a unique routing trace between the at least one touch sensor circuit and each of the plurality of touch sensor electrodes, wherein the plurality of routing traces have a shared path along at least a portion of a path between the plurality of touch sensor electrodes and the at least one touch sensor circuit; and 2) changing the thickness of at least one of the plurality of routing traces along the shared path to thereby reduce parasitic capacitance on the plurality of routing traces.