Haptic system with increased LRA bandwidth
AssigneeImmersion Corporation
InventorsStephen D. Rank, Erin B. Ramsay, Henry Da Costa, Arnab Sen, Elena Renee Redelsheimer
Life of this patent
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Abstract
A method of generating a haptic effect on a linear resonance actuator (“LRA”) having a resonant frequency includes receiving a haptic effect signal for the haptic effect, where the haptic effect comprises a desired frequency that is off-resonant from the LRA. The method further includes generating a first sine wave at the desired frequency and generating a second sine wave at or near the resonant frequency. The method further includes combining the first sine wave and the second sine wave to generate a drive signal.
Claims18
A method of generating a vibratory haptic effect by a linear resonance actuator (LRA) having a resonant frequency, the method comprising:
- receiving an input haptic effect signal comprising a desired frequency;
- comparing the desired frequency to a critical range, the critical range including at least one frequency below the resonant frequency;
- determining an output haptic effect signal based on comparing the desired frequency and the frequency transition range;
- applying the output haptic effect signal to the LRA to generate the vibratory haptic effect.
A haptic effect system comprising:
- a linear resonance actuator (LRA) having a resonant frequency;
- an actuator drive circuit coupled to the LRA;
- and
- a controller coupled to the actuator drive circuit, wherein the controller receives an input haptic effect signal comprising a desired frequency;
- wherein the controller is configured to
- compare the desired frequency to a critical range, the critical range including at least one frequency below the resonant frequency,
- determine an output haptic effect signal based on comparing the desired frequency and the critical range, and
- wherein the actuator drive circuit is configured to apply the output haptic effect signal to the LRA, causing the LRA to generate a vibratory haptic effect.
Dependencies are inferred from the claim text.