Timing of haptic signals

1. A capacitance module, comprising:

a capacitive sensor;

a first haptic motor;

a second haptic motor;

wherein the first haptic motor and second haptic motor are in mechanical communication with the capacitive sensor;

controlling resources connected to the capacitive sensor and the plurality of haptic motors with memory;

wherein the memory contains programmed instructions that cause the controlling resources, when activated, to:

determine when to activate the first haptic motor in response to a user input;

determine when to activate the second haptic motor in response to the user input;

generate a first haptic signal with the first haptic motor at a first determined time; and

generate a second haptic signal with the second haptic motor at a second determined time;

wherein the first haptic signal and second haptic signal constructively interfere at the location of user input.

2. The module of claim 1 , wherein the programmed instructions cause the controlling resources, when activated, to:

determine the waveform characteristics of the first haptic signal; and

determine the waveform characteristics of the second haptic signal based on the waveform characteristics of the first haptic signal.

3. The module of claim 1 , wherein the first haptic signal and second haptic signal generate a haptic feedback that is just tangible at and/or near the location of user input.

4. The module of claim 1 , wherein the first haptic signal and second haptic signal are timed to arrive at the location of user input at the same time.

5. The module of claim 1 , wherein:

determining when to activate the first haptic motor includes determining a distance between the user input and the first haptic motor; and

determining when to activate the second haptic motor includes determining a distance between the user input and the second haptic motor.

6. The module of claim 1 , wherein the capacitive sensor includes at least one pre-defined region, wherein the first determined time and second determined time are pre-programmed based, at least in part, on the at least one pre-defined region.

7. The module of claim 1 , wherein the first determined time and the second determined time have the same value.

8. The module of claim 1 , wherein the capacitance module is a touchpad.

9. The module of claim 1 , wherein the first haptic signal and the second haptic signal are tuned to minimize vibrations perceptible outside of the area defined by the capacitance module.

10. A method for delivering a haptic feedback with a capacitance module, comprising:

obtaining a location of user input using a capacitive sensor in the capacitance module;

determining when to activate a first haptic motor in the capacitance module based on the location of the user input;

determining when to activate a second haptic motor in the capacitance module based on the location of the user input;

generating a first haptic signal with the first haptic motor at the first determined time; and

generating a second haptic signal with the second haptic motor at the second determined time;

wherein the haptic feedback comprises the first haptic signal and second haptic signal;

wherein the first haptic signal and second haptic signal constructively interfere at the location of user input.

11. The method of claim 10 , further comprising:

determining the waveform characteristics of the first haptic signal; and

determining the waveform characteristics of the second haptic signal based on the waveform characteristics of the first haptic signal.

12. The method of claim 10 , wherein the first haptic signal and second haptic signal generate a haptic feedback that is just perceptible at and/or near the location of user input.

13. The method of claim 10 , wherein the first haptic signal and second haptic signal are timed to arrive at the location of user input at the same time.

14. The method of claim 10 , wherein:

determining when to activate the first haptic motor includes determining a distance between the user input and the first haptic motor; and

determining when to activate the second haptic motor includes determining a distance between the user input and the second haptic motor.

15. The method of claim 10 , wherein:

the capacitive sensor includes at least one pre-defined region; and

the first determined time and second determined time are pre-programmed based, in part, on the pre-defined region.

16. The method of claim 10 , wherein the capacitance module is a touchpad.

17. A computer-program product for generating a haptic feedback using a capacitance module, the computer-program product comprising a non-transitory, computer readable medium storing instructions executable by a processor to:

obtain a location of user input using a capacitive sensor in the capacitance module;

determine when to activate a first haptic motor in the capacitance module based on the location of the user input;

determine when to activate a second haptic motor in the capacitance module based on the location of the user input;

generate a first haptic signal with the first haptic motor at the first determined time; and

generate a second haptic signal with the second haptic motor at the second determined time;

wherein the haptic feedback comprises the first haptic signal and second haptic signal;

wherein the first haptic signal and second haptic signal constructively interfere at the location of user input.

18. The computer-program product of claim 17 , the medium storing further instructions executable by a processor to:

determine the waveform characteristics of the first haptic signal; and

determine the waveform characteristics of the second haptic signal based on the waveform characteristics of the second haptic signal.