Patent ID: 9524063
Filing Date: 2016-12-20
CPC Classification: G06F

Claim Text:
1. A system for determining touch contact locations, comprising: a communication interface configured to receive a signal that has been disturbed by touch contacts of a touch input on a surface, wherein the signal was propagating in a medium of the surface prior to the touch input; and a processor coupled with the communication interface and configured to: correlate the received signal to determine a time domain signal encoding a time delay represented in the received signal; transform the time domain signal to determine a spatial domain signal, wherein transforming the received signal includes translating the time delay represented in the received signal disturbed by the touch input to a physical distance encoded in the spatial domain signal; compare the spatial domain signal with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts, wherein the spatial domain signal encodes the physical distance traveled by the received signal due to the disturbance caused by the touch input and the expected signal encodes a variable with respect to a measure of distance; determine the locations of the touch contacts of the touch input based at least in part on the comparison.