DETECTION OF A NUMBER OF TOUCH CONTACTS OF A MULTI-TOUCH INPUT

摘要

Determining touch contact locations is disclosed. A signal that has been disturbed by touch contacts of a touch input on a surface is received. The received signal is transformed to determine a spatial domain signal. The spatial domain signal is compared with an expected signal associated with potential locations of sources of disturbances caused by the touch contacts. The locations of the touch contacts of the touch input are determined based at least in part on the comparison.

主权项

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; and a processor coupled with the communication interface and configured to:
transform the received signal to determine a 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; anddetermine the locations of the touch contacts of the touch input based at least in part on the comparison.