Method and apparatus for modulating haptic feedback
AssigneeUltrahaptics IP Ltd
InventorsBenjamin John Oliver Long, Thomas Andrew Carter, Sriram Subramanian
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Abstract
The present invention concerns a method and apparatus for the modulation of an acoustic field for providing tactile sensations. A method of creating haptic feedback using ultrasound is provided. The method comprises the steps of generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point, and modulating the generation of the ultrasound waves using a waveform selected to produce little or no audible sound at the haptic feedback point.
Claims21
A method of creating haptic feedback using ultrasound comprising the steps of:
- generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point;
- and
- modulating the generation of the ultrasound waves using a waveform selected to produce little audible sound at the haptic feedback point.
A haptic feedback system comprising:
- a phased array comprising a plurality of transducers arranged to emit ultrasound to create a haptic feedback point, the phased array arranged to emit ultrasound according to a modulation waveform having a shape that produces little or no sound when the ultrasound converges at the haptic feedback point.
Dependencies are inferred from the claim text.