Touchpad having increased noise rejection, decreased moisture sensitivity, and improved tracking
First Claim
1. A method for providing adaptable precision of a capacitance sensitive touchpad, said method comprising the steps of:
- (1) determining a speed of an object moving on a touchpad surface;
(2) determining if the speed of the object is above or below a speed threshold;
(3) increasing precision of the touchpad when the speed of the object is determined to be below the speed threshold; and
(4) decreasing precision of the touchpad when the speed of the object is determined to be above the speed threshold.
0 Assignments
0 Petitions
Accused Products
Abstract
An improved touchpad and measurement circuitry for enabling input to a computer or other electronic device. The system includes an X electrode, a Y electrode, a common sensing electrode, and a “water” electrode, wherein these four separate electrodes can be implemented in various physical configurations to obtain the desired effects, wherein moisture and water droplets can be identified and compensated for so as not to interfere with the input of data, wherein noise rejection is achieved by using a time aperture filtering method, wherein an improved scanning technique focuses scanning around an identified input object, wherein an adaptive motion filter responds to the speed and acceleration of an object being tracked, and wherein the measurement circuitry has an increased dynamic range enabling the touchpad to operate with greater tolerances to manufacturing variances.
-
Citations
20 Claims
-
1. A method for providing adaptable precision of a capacitance sensitive touchpad, said method comprising the steps of:
-
(1) determining a speed of an object moving on a touchpad surface; (2) determining if the speed of the object is above or below a speed threshold; (3) increasing precision of the touchpad when the speed of the object is determined to be below the speed threshold; and (4) decreasing precision of the touchpad when the speed of the object is determined to be above the speed threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for providing adaptable precision of a capacitance sensitive touchpad, said method comprising the steps of:
-
(1) determining a rate of acceleration or deceleration of an object moving on a touchpad surface; (2) determining if the rate of acceleration or deceleration is above or below an acceleration or deceleration threshold; (3) increasing precision of the touchpad when the rate of acceleration or deceleration is determined to be below the acceleration or deceleration threshold; and (4) decreasing precision of the touchpad when the speed of the object is determined to be above the acceleration or deceleration threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for providing adaptable precision of a capacitance sensitive touchpad, said method comprising the steps of:
-
(1) monitoring at least one aspect of an object moving on a touchpad surface; (2) determining if the at least one aspect of the object has reached a state wherein the precision of the capacitance sensitive touchpad should be modified; (3) increasing precision of the touchpad when the at least one aspect of the object is determined to be within a first state; and (4) decreasing precision of the touchpad when the at least one aspect of the object is determined to be within a second state. - View Dependent Claims (18)
-
-
19. A method for balancing accuracy of object position determination on a touchpad and rate of updates to a display device of the object position, said method comprising the steps of:
-
(1) determining if accuracy of object position is more critical to touchpad performance than rate of updates to a display device; (2) optimizing touchpad performance to provide more accurate position determination information when that aspect of touchpad performance is more important than rate of display; and (3) optimizing touchpad performance to provide an increased rate of updates of position information to a display device when that aspect of touchpad performance is more important that accuracy of position information. - View Dependent Claims (20)
-
Specification