Frequency-domain haptic waveform compensation for haptic transducers
AssigneeCirrus Logic, Inc.
InventorsKok Chin Chang, Marco Janko, Kyle Wilkinson
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Abstract
A method for minimizing post-playback oscillation during playback of a haptic playback waveform to a haptic transducer may include determining whether a frequency response of the haptic playback waveform has a notch with a notch frequency at approximately a resonant frequency of the haptic transducer and, responsive to the notch frequency differing from the resonant frequency, modifying the haptic playback waveform for playback to the haptic transducer by shifting the notch frequency to approximately the resonant frequency.
Claims15
A method for minimizing post-playback oscillation during playback of a haptic playback waveform to a haptic transducer, comprising:
- determining whether a frequency response of the haptic playback waveform has a notch with a notch frequency at approximately a resonant frequency of the haptic transducer;
- and
- responsive to the notch frequency differing from the resonant frequency, modifying the haptic playback waveform for playback to the haptic transducer by shifting the notch frequency to approximately the resonant frequency.
A system for minimizing post-playback oscillation during playback of a haptic playback waveform to a haptic transducer, comprising:
- one or more inputs for receiving information regarding a resonant frequency of the haptic transducer;
- and
- a processing subsystem configured to:
- determine whether a frequency response of the haptic playback waveform has a notch with a notch frequency at approximately the resonant frequency of the haptic transducer;
- and
- responsive to the notch frequency differing from the resonant frequency, modify the haptic playback waveform for playback to the haptic transducer by shifting the notch frequency to approximately the resonant frequency.
A mobile device, comprising:
- a haptic transducer;
- and
- a haptic control subsystem configured to:
- determine whether a frequency response of a haptic playback waveform has a notch with a notch frequency at approximately the resonant frequency of the haptic transducer;
- and
- responsive to the notch frequency differing from the resonant frequency, modify the haptic playback waveform for playback to the haptic transducer by shifting the notch frequency to approximately the resonant frequency.
Dependencies are inferred from the claim text.