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Moves of magnetic fields, Moves by magnetic fieldsMagnetact: A Magnetic force-based Tactile technology 
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Magnetact is a magnetic tactile technology that does not require any power supply or wiring to present a tactile sensation. The specific patterned magnetic rubber sheets present a unique tactile texture when they are rubbed together. However, it takes time to magnetize the kind of detailed lattice pattern of S/N poles that can provide a selective tactile presentation. Therefore, we invented a new method for generating complex geometric magnetic patterns by layering multiple magnetic rubber sheets with simple magnetic patterns. Moreover, the superposed magnetic lattice patterns can be dynamically changed by rotating the layered magnetic sheets. This method resolves the tradeoff between the complexity of the magnetized pattern and the time required for magnetization.
The Magnetact technology is expected to be applied to a variety of tactile experiences, including in online tactile workshops, portable tactile picture books, and low-cost tactile VR experiences.
[1] K. Yasu, “Magnetic plotter: a macrotexture design method using magnetic rubber sheets,” in Proc. the 2017 CHI Conference on Human Factors in Computing Systems (CHI '17), 2017.
[2] K. Yasu, “MagneLayer: force field fabrication by layered magnetic sheets,” in Proc. the 2019 CHI Conference on Human Factors in Computing Systems (CHI '20), 2020.
[3] K. Yasu, M. Ishikawa, “Magnetact Animals: a simple kinetic toy kit for a creative online workshop for children,” in Proc. CHI EA '21, Article. No. 198, pp. 1–4, 2021.
Kentaro Yasu / Sensory representation research Group, Human and Information Science Laboratory
Email: cs-openhouse-ml@hco.ntt.co.jp