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.
Claims20
A method comprising:
- creating a pressure pattern with a plurality of transducers using ultrasound, comprising:
- 1) offsetting a first transducer of the plurality of transducers for a position, phase, and amplitude of each of the plurality of transducers other than the first transducer to produce an instance of iterative transducer offset data;
- and
- 2) determining a phase and an amplitude of a point within a model volume by combining instances of iterative transducer offset data.
A system comprising:
- a set of transducers creating an interpolation between:
- (1) a first target pressure pattern associated with a first phase and amplitude configuration;
- and
- (2) a second target pressure pattern associated with a second phase and amplitude configuration.
Dependencies are inferred from the claim text.