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US 2019/0318590 A1Published application
Haptic devices using structured metasurfaces
AssigneesCalifornia Institute of Technology, Facebook, Inc.
InventorsOsama R. BILAL, Vincenzo COSTANZA, Chiara DARAIO, Frances LAU, Ali ISRAR
Life of this patent
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Abstract
A haptic device can be realized with a single acoustic actuator controlling multiple unit cells by having the unit cells be composed of cantilever arms with different resonant frequencies. The unit cells can be further improved by having the cantilever arms be in a spiral shape, and more specifically an Archimedes spiral shape.
Claims24
A haptic feedback device comprising:
- an acoustic actuator;
- and
- a plurality of unit cells, each unit cell comprising a cantilever arm having at least one different resonant frequency modes from each other cantilever arm of other unit cells of the plurality of unit cells, each unit cell of the plurality of unit cells being configured at a distance from the acoustic actuator such that an acoustic signal containing a resonant frequency of an out-of-plane mode from the acoustic actuator creates a displacement amplification by the cantilever arm of the unit cell.
A method of providing haptic feedback to a user, comprising:
- providing the user with a haptic feedback device, the haptic feedback device comprising:
- a mounting device;
- an acoustic actuator mounted in the mounting device;
- and
- a plurality of unit cells, each unit cell comprising a cantilever arm having at least one different resonant frequency modes from each other cantilever arm of other unit cells of the plurality of unit cells, each unit cell of the plurality of unit cells being configured at a distance from the acoustic actuator such that an acoustic signal containing a resonant frequency of an out-of-plane mode from the acoustic actuator creates a displacement amplification by the cantilever arm of the unit cell;
- and
- sending a signal to the acoustic actuator such that the acoustic actuator sends an acoustic signal to the plurality of unit cells.
4 more elements
Dependencies are inferred from the claim text.