Abstract
This disclosure describes techniques that enable a computing device (e.g., a smartphone, tablet, wearable device, game controller, etc.) to generate device-agnostic beating haptic effects (e.g., low-frequency vibrations, breathing sensations, fluttery feedback, engine textures, etc.) using a piecewise linear envelope (PWLE) representation. The computing device may receive one or more beating parameters (e.g., beating frequency, carrier frequency, sharpness, amplitude scaling envelope, etc.) and calculate a high-resolution composite beating waveform envelope. To achieve compatibility across diverse actuator hardware (e.g., linear resonant actuators (LRAs), voice coil actuators, etc.), the computing device may simplify the high-resolution composite amplitude envelope into a PWLE representation using a constrained Ramer-Douglas-Peucker (RDP) recursion model. For instance, the computing device may gate control point insertion based on human tactile perception properties (e.g., vibrotactile just noticeable difference (JND) thresholds, perceptual salience, etc.) and physical actuator limits (e.g., minimum segment duration, hardware response time, etc.). If a candidate control point violates the minimum segment duration, the computing device may use a window-shrinking fallback mechanism to re-identify a salient control point satisfying temporal constraints. Furthermore, the computing device may shift the carrier frequency to mitigate reduced modulation depth resulting from nonlinear frequency response profiles. By aligning a sideband frequency with a resonant frequency of a target actuator, the computing device may preserve the structural magnitude ratio of waveform components. In this way, the techniques of this disclosure may provide rich, consistent, and deep low-frequency haptic beats across varying consumer hardware without requiring manual, device-specific time-series data calculations.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Xu, Shan; Philip Quinn; and Tan, Hong Z., "GENERATING DEVICE-AGNOSTIC BEATING HAPTIC EFFECTS", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/11088