Patent ID: 6856259

Claim:
A method for identifying locations of two or more touch inputs to a sensor substrate in a touchscreen system wherein the touch inputs overlap in time, the substrate having an X axis comprising X coordinates and a Y axis comprising Y coordinates, comprising the steps of: (a) repeatedly measuring signals indicative of the locations of the two or more touch inputs, the locations having X and Y coordinates and the signals having associated X and Y magnitudes; (b) for each X coordinate, storing the associated X magnitude measured for each repeated measurement as elements in an X object; (c) for each Y coordinate, storing the associated Y magnitude measured for each repeated measurement as elements in a Y object; (d) for possible pairings of X and Y coordinates, comparing elements of associated X objects with corresponding elements of associated Y objects; and (e) selecting pairings of X and Y coordinates corresponding to locations of actual touch inputs based on the comparison of step (d).