Real-time patterned haptic effect generation using vibrations

• US 10,210,724 B2
• Filed: 06/27/2017
• Issued: 02/19/2019
• Est. Priority Date: 06/29/2016
• Status: Active Grant

• Current Assignee: Immersion Corporation
• Original Assignee: Immersion Corporation
• Inventors: Venkatesan, Srivatsav
• Primary Examiner(s): McCormack, Thomas S
• Application Number:
  US15/634,288
• Publication Number:
  US 20180005497A1
• Time in Patent Office: 602 Days
• CPC Class Codes: G08B 6/00 Tactile signalling systems, e.g. personal calling systems
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation

Abstract

One embodiment provides haptic functionality. The embodiment receives an encoded value that encodes an actuator drive value, where the actuator drive value corresponds to a strength of a haptic effect. The embodiment converts the encoded value into a pattern of ON/OFF durations, and plays back the pattern of ON/OFF durations on an actuator to produce the haptic effect.

Claims

1. A non-transitory computer readable medium having instructions stored thereon that, when executed by a processor, cause the processor to provide haptic feedback by performing operations comprising:

receiving, at a user device, an input signal from a remote location, wherein the input signal includes an encoded value that encodes an actuator drive value, wherein the actuator drive value corresponds to a strength of a haptic effect;

converting, at the user device, the encoded value into a pattern of ON/OFF durations; and

playing back the pattern of ON/OFF durations on an actuator in the user device to produce the haptic effect.

2. The computer readable medium of claim 1, wherein the actuator drive value is provided by a design tool on a workstation, wherein the encoded value is obtained at the workstation, wherein the user device communicates with the workstation and operates the actuator.

3. The computer readable medium of claim 1, wherein the encoded value is obtained by using the actuator drive value to modulate a pulse width of a pulse, wherein the encoded value is indicative of an actuator ON duration.

4. The computer readable medium of claim 3, wherein a pulse period of the pulse is selected according to characteristics of the actuator.

5. The computer readable medium of claim 3, wherein the operations further comprise:

determining a pulse period of the pulse.

6. The computer readable medium of claim 1, wherein the playing back is performed by providing the pattern of ON/OFF durations to an Android vibrate application programming interface (API).

7. The computer readable medium of claim 1, wherein the converting of the encoded value into the pattern of ON/OFF durations includes tracking a state of the actuator over time.

8. The computer readable medium of claim 7, wherein the state of the actuator over time includes one or more of an actuator ON time parameter, an actuator OFF time parameter, an actuator active time parameter, or an actuator current state parameter.

9. The computer readable medium of claim 8, wherein an actuator ON duration as indicated by the encoded value is copied to the actuator ON time parameter.

10. The computer readable medium of claim 8, wherein an actuator OFF parameter is set as a difference between a pulse duration of a pulse and the actuator ON time parameter.

11. The computer readable medium of claim 8, wherein, when the actuator current state parameter is OFF and a previous encoded value is less than the encoded value, the actuator current state parameter is changed to ON and the actuator active time parameter is reset.

12. The computer readable medium of claim 8, wherein, when the actuator current state parameter is ON and a previous encoded value is greater than the encoded value, the actuator current state parameter is changed to OFF and the actuator active time parameter is reset.

13. The computer readable medium of claim 8, wherein the converting of the encoded value into the pattern of ON/OFF durations includes performing an update function every millisecond.

14. The computer readable medium of claim 13, wherein the update function increments the actuator active time parameter.

15. The computer readable medium of claim 14, wherein the update function compares the actuator active time parameter with a required state time.

16. The computer readable medium of claim 15, wherein, when the actuator current state parameter is ON, the update function compares the actuator active time parameter with the actuator ON time parameter, and if the actuator active time parameter is greater than the actuator ON time parameter, resets the actuator active time parameter and changes the actuator current state parameter to OFF.

17. The computer readable medium of claim 15, wherein, when the actuator current state parameter is OFF, the update function compares the actuator active time parameter with the actuator OFF time parameter, and if the actuator active time parameter is greater than the actuator OFF time parameter, resets the actuator active time parameter and changes the actuator current state parameter to ON.

18. A method for providing haptic feedback, the method comprising:

receiving, at a user device, an input signal from a remote location, wherein the input signal includes an encoded value that encodes an actuator drive value, wherein the actuator drive value corresponds to a strength of a haptic effect;

converting, at the user device, the encoded value into a pattern of ON/OFF durations; and

playing back the pattern of ON/OFF durations on an actuator in the user device to produce the haptic effect.

19. The method of claim 18, wherein the actuator drive value is provided by a design tool on a workstation, wherein the encoded value is obtained at the workstation, wherein the user device communicates with the workstation and operates the actuator.

20. A system for providing haptic feedback, the system comprising:

a processor; and

memory storing instructions that, when executed by the processor, cause the processor to perform operations including

receiving, at a user device, an input signal from a remote location, wherein the input signal includes an encoded value that encodes an actuator drive value, wherein the actuator drive value corresponds to a strength of a haptic effect;

converting, at the user device, the encoded value into a pattern of ON/OFF durations; and

playing back the pattern of ON/OFF durations on an actuator in the user device to produce the haptic effect.