Patent ID: 7710404

Claim:
A method for gesture detection on a touchpad, comprising the steps of: a. verifying that an object touches on the touchpad, verifying that an object touches on the touchpad includes: i) monitoring a sensed value on the touchpad; ii) monitoring a variation of the sensed value when the sensed value is greater than a threshold; and iii) determining that the object touches on the touchpad if the sensed value remains greater than the threshold within a first reference time interval and maintains a continuously increasing trend during the first reference time interval; b. determining whether or not the object moves on the touchpad; c. verifying that the object leaves the touchpad if the object is determined not to move on the touchpad in step b; d. initiating a gesture signal after the object is verified to leave the touchpad; e. counting a departure time after the object leaves the touchpad; and f. terminating the gesture signal after the departure time reaches a second reference time interval.