Patent ID: 8902183

Claim:
A display device comprising: a touch-sensitive display; an impact sensor attached to the touch-sensitive display and configured to generate a signal representative of impacts to the touch-sensitive display; and a computing unit configured to: receive the signal; detect a peak value of the signal; determine whether a rising edge of the peak detected signal and the magnitude of the peak detected signal meet predetermined criteria; and indicate detection of user-intended touch in response to determining that the predetermined criteria are met, wherein the computing unit comprises: a voltage divider configured to receive the peak detected signal and generate a first output that is a fraction of the peak detected signal; a low pass filter configured to receive the peak detected signal and to apply low-pass filtering to the peak detected signal to generate a second output; and a comparator configured to receive the first and second outputs as inputs and to generate a trigger pulse in response to the first output being greater than the second output to indicate detection of user-intended touch.