Transducer system and method
The system can include one or more transducers, wherein a transducer can include a set of cantilevers and a set of support components. The system can optionally include a processing system and/or any other suitable components. In variants, the system can function as an ultrasonic emitter (e.g., to provide gloves-free tactile sensation for augmented reality and/or virtual reality haptics systems) and/or as a sensor.
1 . A system, comprising: an array of transducers, wherein each transducer comprises:
a set of cantilevers, wherein each cantilever comprises a side comprising a free portion and a coupled portion, wherein each cantilever is coupled to an adjacent cantilever in the set of cantilevers along the coupled portion of the side of the cantilever, wherein each cantilever comprises:
an upper electrode;
a piezoelectric component;
a lower electrode, wherein a distance between a boundary of the lower electrode and the free portion of the side of the cantilever is less than a distance between a boundary of the piezoelectric component and the free portion of the side of the cantilever; and
a passive component;
a processing system configured to, for each cantilever in the set of cantilevers, drive deflection of the cantilever by applying a voltage differential at the upper electrode and the lower electrode of the cantilever; and
a cover comprising an opening, wherein the opening is positioned above the set of cantilevers, wherein an edge of the opening is angled, wherein the opening amplifies acoustic waves generated by the deflection of each cantilever of the set of cantilevers.
2 . The system of claim 1 , wherein, for each cantilever, a length of the coupled portion of the side of the cantilever is at least 10% of a length of the side of the cantilever.
3 . The system of claim 1 , wherein the transducer further comprises a support component coupled to each cantilever of the set of cantilevers at a root of the cantilever.
4 . The system of claim 1 , wherein the set of cantilevers comprises at least four cantilevers.
5 . The system of claim 1 , wherein the upper electrodes of each cantilever are electrically connected, and wherein the lower electrodes of each cantilever are electrically connected.
6 . The system of claim 1 , wherein a width of the lower electrode is greater than a width of the upper electrode.
7 . The system of claim 1 , wherein each cantilever of the set of cantilevers is driven at an ultrasonic frequency.
8 . The system of claim 7 , wherein each cantilever has a resonance frequency at the ultrasonic frequency.
9 . The system of claim 1 , wherein the array of transducers is configured to provide mid-air haptic stimulation to a user.
10 . The system of claim 1 , wherein, for each cantilever, the boundary of the piezoelectric component extends to the coupled portion of the side of the cantilever.
11 . The system of claim 1 , wherein, for a pair of adjacent cantilevers in the set of cantilevers, a slit separates the free portion of a side of a first cantilever in the pair of adjacent cantilevers from the free portion of a side of a second cantilever in the pair of adjacent cantilevers, wherein an endpoint of the slit is rounded.
12 . The system of claim 1 , wherein the opening is wider at a top surface of the cover than at a bottom surface of the cover, the bottom surface nearer to the set of cantilevers than the top surface.