Abstract
A carrier-modulated ultrasonic haptic button is described. A piezoelectric actuator is coupled to a button body to form a resonant structure driven at a sonic or ultrasonic carrier frequency, including ultrasonic frequencies. A tactile sensation is produced by modulating an amplitude envelope of the carrier with a lower-frequency modulation signal in a tactile sensitivity range, such that ultrasonic mechanical energy is transferred through the button to a user’s finger while the perceived haptic effect follows the modulation. Mechanical integration may use a flexible seam such as an o-ring, clamped edges, fused seams with isolation features, or a single-piece button-housing structure with acoustic isolation. Sensing may include capacitive pads for finger presence and slider operation and a force/load sensor located at high-strain regions for press/release detection, with a workflow that keeps capacitive sensing active and enables force sensing as needed.
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Recommended Citation
Anonymous, "Carrier-Modulated Ultrasonic Haptic Feedback System", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/10747