Patent ID: 9465481
Filing Date: 2016-10-11
CPC Classification: G06F

Claim Text:
1. A method of performing touch detection within an integrated circuit, the method comprising: receiving touch sensor signal data from a touch sensor; filtering, using a first filter, the received touch sensor signal data to create a first filtered data signal; filtering, using a second filter, the received touch sensor signal data to create a second filtered data signal; calculating a difference between the first and second filtered data signals to determine a delta value; integrating, using an integrator, the determined delta value to generate an integrated delta value; detecting an occurrence of a touch based on the integrated delta value exceeding a first threshold value; detecting an occurrence of a sensor release based on the integrated delta value exceeding a second threshold value; and resetting the integrated delta value to an initial value each time the touch is detected and each time the sensor release is detected.