IP Library Granted Patent US 11,380,175
Granted Patent B2
US 11,380,175 · App. 17/038,068 · Granted Jul 5, 2022

Reproducibility of haptic waveform

Inventors: Jeffrey D. Alderson (Austin, TX); John L. Melanson (Austin, TX); Anthony S. Doy (Los Gatos, CA); Eric Lindemann (Boulder, CO)
Assignee: Cirrus Logic, Inc.
G08B6/00B06B1/045
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Quick Facts
Patent No.
US 11,380,175
App. No.
17/038,068
Granted
Jul 5, 2022
Kind
B2
Abstract

A system may include an electromagnetic load capable of generating a haptic event and a haptic processor configured to receive at least one first parameter indicative of a desired perception of the haptic event to a user of a device comprising the electromagnetic load, receive at least one second parameter indicative of one or more characteristics of the device, and process the at least one first parameter and the at least one second parameter to generate a driving signal to the electromagnetic load in order to produce the desired perception to the user despite variances in the device that cause an actual perception of the haptic event to vary from the desired perception.

Claims (26)

1. A system comprising:

an electromagnetic load capable of generating a haptic event;

a haptic processor configured to:

receive at least one first parameter indicative of a desired perception of the haptic event to a user of a device comprising the electromagnetic load, further wherein the at least one first parameter is indicative of a desired acceleration of the device:

receive at least one second parameter indicative of one or more characteristics of the device; and

process the at least one first parameter and the at least one second parameter to generate a driving signal to the electromagnetic load in order to produce the desired perception to the user despite variances in the device that cause an actual perception of the haptic event to vary from the desired perception; and

a waveform generator configured to generate a driving waveform based on the desired acceleration.

2. The system of claim 1 , wherein generating the driving signal comprises generating the driving signal by modifying the driving waveform based on the at least one second parameter.

3. The system of claim 1 , wherein the at least one second parameter is indicative of an equivalent electrical model of the electromagnetic load.

4. The system of claim 1 , wherein the at least one second parameter is indicative of at least one among a resonant frequency and quality factor of the electromagnetic load.

5. The system of claim 1 , wherein the at least one second parameter is indicative of a back-electromotive force associated with the electromagnetic load.

6. The system of claim 1 , wherein the at least one second parameter is indicative of a current haptic event and a historical haptic event associated with the device.

7. The system of claim 1 , wherein the at least one second parameter is determined during at least one among usage of the device by the user, power-up of the device, and production of the device.

8. The system of claim 1 , wherein the electromagnetic load comprises a haptic transducer.

9. A method comprising:

receiving at least one first parameter indicative of a desired perception of a haptic event to a user of a device comprising an electromagnetic load capable of generating the haptic event, further wherein the at least one first parameter is indicative of a desired acceleration of the device;

receiving at least one second parameter indicative of one or more characteristics of the device;

processing the at least one first parameter and the at least one second parameter to generate a driving signal to the electromagnetic load in order to produce the desired perception to the user despite variances in the device that cause an actual perception of the haptic event to vary from the desired perception; and

generating a driving waveform based on the desired acceleration.

10. The method of claim 9 , wherein generating the driving signal comprises generating the driving signal by modifying the driving waveform based on the at least one second parameter.

11. The method of claim 9 , wherein the at least one second parameter is indicative of an equivalent electrical model of the electromagnetic load.

12. The method of claim 9 , wherein the at least one second parameter is indicative of at least one among a resonant frequency and quality factor of the electromagnetic load.

13. The method of claim 9 , wherein the at least one second parameter is indicative of a back-electromotive force associated with the electromagnetic load.

14. The method of claim 9 , wherein the at least one second parameter is indicative of a current haptic event and a historical haptic event associated with the device.

15. The method of claim 9 , wherein the at least one second parameter is determined during at least one among usage of the device by the user, power-up of the device, and production of the device.

16. The method of claim 9 , wherein the electromagnetic load comprises a haptic transducer.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 21, 2022
From: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
To: CIRRUS LOGIC, INC.
Reel/Frame 059059/0167 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 30, 2020
From: ALDERSON, JEFFREY A.; MELANSON, JOHN L.; DOY, ANTHONY S.; LINDEMANN, ERIC
To: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
Reel/Frame 053929/0605 →
Continuity (2)
Provisional Application 62925307 · Oct 24, 2019
Related Publication 20210125469A1 · Apr 29, 2021
Cited By (1)
US 12,190,716