Patent ID: 9372581
Filing Date: 2016-06-21
CPC Classification: G06F

Claim Text:
1. A method for reconfiguring a capacitive touch controller, the method comprising: detecting a triggering event for reconfiguring the capacitive touch controller; measuring a received signal from a capacitive touch panel; determining an auto-correlation of the received signal; determining a filter transfer function for rejecting interference from a subsequently received signal, where the filter transfer function is based on the auto-correlation of the received signal; determining a transmit frequency for stimulating the capacitive touch panel, where the transmit frequency is based on the auto-correlation of the received signal, including determining an optimal transmit frequency from a range of available frequencies, where each available frequency has a mean square error (MSE), where the MSE is determined by the inner product of the auto-correlation of the received signal and auto-correlation of the filter transfer function, and where the optimal transmit frequency is the available frequency having the minimum MSE; stimulating the capacitive touch panel using the transmit frequency by applying to the capacitive touch panel a time varying signal having the transmit frequency, and subsequently receiving a signal from the capacitive touch panel, the subsequently received signal being indicative of a response of the capacitive touch panel to the time varying signal; and filtering a subsequently received signal using the filter transfer function.