Method for determining when a force sensor signal baseline in a force-based input device can be updated
First Claim
Patent Images
1. A method for determining when a force sensor signal baseline in a force-based input device can be updated, the method comprising:
- accepting a force sensor signal associated with a touch activity;
determining a force sensor signal range comprising a difference between a decaying maximum of the force sensor signal and a decaying minimum of the force sensor signal, wherein the force sensor signal range decays with time and the force sensor signal range is reset when the force sensor signal exceeds a current range;
declaring a touch event when the force sensor signal range exceeds a predetermined activity threshold;
determining a baseline for the force sensor signal;
holding the previously determined baseline for the force sensor signal when a touch event is declared;
updating the previously determined baseline for the force sensor signal when a touch event is not declared; and
outputting a conditioned force sensor signal that is adjusted based on the updated baseline for the force sensor signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method for determining a force sensor signal baseline in a force-based input device. The method includes accepting a signal associated with touch activity and determining a signal range, wherein the signal range decays with time and is reset when the signal exceeds the current range. A touch event is declared when the signal range exceeds a predetermined activity threshold. A previously determined baseline is held when a touch event is declared, and updated when a touch event is not declared.
-
Citations
8 Claims
-
1. A method for determining when a force sensor signal baseline in a force-based input device can be updated, the method comprising:
-
accepting a force sensor signal associated with a touch activity; determining a force sensor signal range comprising a difference between a decaying maximum of the force sensor signal and a decaying minimum of the force sensor signal, wherein the force sensor signal range decays with time and the force sensor signal range is reset when the force sensor signal exceeds a current range; declaring a touch event when the force sensor signal range exceeds a predetermined activity threshold; determining a baseline for the force sensor signal; holding the previously determined baseline for the force sensor signal when a touch event is declared; updating the previously determined baseline for the force sensor signal when a touch event is not declared; and outputting a conditioned force sensor signal that is adjusted based on the updated baseline for the force sensor signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification