Back to results
US 8,013,842 B2Granted
Method for gesture detection on a capacitive touchpad
AssigneeElan Microelectronics Corporation
InventorsJia-Yih Lii, Yung-Lieh Chien
Life of this patent
Estimating the term…
Abstract
In a gesture detection method for a capacitive touchpad, various gesture operations are determined by detecting the touching on the touchpad, leaving from the touchpad, and moving on the touchpad.
Claims21
A method for object detection on a capacitive touchpad, comprising the steps of:
- (a) verifying that an object touches the touchpad for the first time, a sensed value being monitored for a predefined set of points in a region of the touchpad;
- (b) determining whether the object moves on the touchpad;
- (c) verifying that the object leaves the touchpad for the first time if the object does not move on the touchpad;
- (d) sending a first gesture signal;
- (e) counting a departure time after the object leaves the touchpad;
- (f) verifying that the object touches the touchpad for the second time if the departure time is shorter than a first reference time;
- (g) determining whether the object moves on the touchpad;
- (h) calculating a position information of the object if the object moves on the touchpad;
- (i) maintaining the first gesture signal to produce a second gesture signal;
- (j) verifying that the object leaves the touchpad for the second time to terminate the second gesture signal;
- (k) counting a second departure time after the object leaves the touchpad for the second time;
- (l) verifying that the object touches the touchpad for the third time if the second departure time is shorter than a second reference time;
- (m) determining whether the object moves on the touchpad;
- and
- (n) if the object does not move on the touchpad, verifying that the object leaves the touchpad for the third time and sending a third gesture signal to terminate the first gesture signal, and if the object moves on the touchpad, repeating the previous steps from the step (h);
- wherein the first gesture signal is determined independent of when the object touches the touchpad for the first time and when the object leaves the touchpad;
- at least one of the object movement, object touching, and object leaving determinations being made based on a trend indicated by a difference between the sensed values at different times for the predefined set of points within the region of the touchpad.
14 more elements
A method for object detection on a capacitive touchpad, comprising the steps of:
- (a) verifying that an object touches the touchpad for the first time, a sensed value being monitored for a predefined set of points in a region of the touchpad;
- (b) determining whether the object moves on the touchpad;
- (c) verifying that the object leaves the touchpad for the first time if the object does not move on the touchpad;
- (d) sending a first gesture signal;
- (e) counting a first departure time after the object leaves the touchpad;
- (f) verifying that the object touches the touchpad for the second time if the first departure time is shorter than a first reference time;
- (g) determining whether the object moves on the touchpad;
- (h) calculating a position information of the object if the object moves on the touchpad;
- (i) maintaining the first gesture signal to produce a second gesture signal;
- (j) verifying that the object leaves the touchpad for the second time to terminate the second gesture signal;
- (k) counting a second departure time after the object leaves the touchpad for the second time;
- (l) verifying that the object touches the touchpad for the third time if the second departure time is shorter than a second reference time;
- (m) determining whether the object moves on the touchpad;
- (n) calculating the position information of the object if the object moves on the touchpad;
- (o) maintaining the first gesture signal to produce a third gesture signal;
- (p) verifying that the object leaves the touchpad for the third time to terminate the third gesture signal;
- (q) counting a third departure time after the object leaves the touchpad for the third time;
- and
- (r) if the third departure time is longer than second reference time, initiating a fourth gesture signal to terminate the first gesture signal, and if the third departure time is shorter than second reference time, repeating the previous steps from the step (1);
- wherein the first gesture signal is determined independent of when the object touches the touchpad for the first time and when the object leaves the touchpad;
- at least one of the object movement, object touching, and object leaving determinations being made based on a trend indicated by a difference between the sensed values at different times for the predefined set of points within the region of the touchpad.
18 more elements
Dependencies are inferred from the claim text.