Patent ID: 8692799
Filing Date: 2014-04-08
Classification: G06F

Abstract:
1. A method for operating a capacitive sensing device, the method comprising: providing a substrate having a plurality of pairs of conductive traces formed thereon, each of the plurality of pairs of conductive traces comprising a first conductive trace having at least one sub-trace and a second conductive trace having at least one sub-trace, wherein within each of the plurality of pairs of conductive traces at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end thereof; measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces, wherein the capacitance variation of at least some of the second conductive traces is measured before the capacitance variation for all of the plurality of first conductive traces is measured; and determining a position coordinate in a two-dimensional coordinate system on the capacitive sensing device based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces.