Heterogeneous Stroke: Using Unique Vibration Cues to Improve the Wrist-Worn Spatiotemporal Tactile Display (ACM CHI 2021)
Have you ever imagined reading texts through your skin? Heterogeneous Stroke is a design concept that utilizes unique vibrations for each actuators to help users better recognize the tactile "stroke". Since a single tactile "stroke" consists of mutually distinctive (=heterogeneous) vibration stimuli, we decided to call this idea "Heterogeneous Stroke". This project was published in CHI 2021. More information about this work can be found in: Paper | DOI | Video
Example usage of Heterogeneous Stroke
This repository provides materials for reproducing our work:
- Sandbox program (C#) of Heterogeneous Stroke interface
- Arduino firmware code that offers independent control of each vibration motors.
- 3D model (.stl) of watch frame (Designed by Jaeyeon Lee)
- Misc. information (e.g., actuator models, Operating Voltages...)
You can compose unique vibrations, and produce the Heterogeneous Stroke in Sandbox Program!
- We used BD6221 motor driver to implement micro-level PWM control for LRA motors (BD6221 Datasheet: http://www.datasheetq.com/datasheet-download/308094/1/ROHM/BD6221)
- We used LRA motor of 10 mm diameter and 3.6mm thickness, with 170 Hz resonance frequency. (Model used in our paper was provided from Samsung Electro-mechanics but it's not buyable for public. Thus, we leave the specs here)
- On a 3D printed watch frame with a size of 40 x 40 mm^2, four vibration motors were attached in a 2 x 2 array form. The distance between the center of the motors was 30 mm, you can see the Figures 5 in the Paper.