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We present an approach to realize the levitation of a small object with an embedded electronic circuit. Luciola is a light-emitting particle with a diameter of 3.5mm and a weight of 16.2mg moving in mid-air in a 10.4cm x 10.4cm x 5.4cm space through acoustic levitation using two 40-kHz 17 x 17 ultrasonic transducer arrays placed face-to-face at a distance of 20cm and wirelessly powered by 12.3-MHz resonant inductive coupling. The novelty of this work is the acoustically levitated electronic object by the combined application of ultrasonic levitation and wireless powering to the levitated electronic object. To enable the levitation of a particle, a custom IC chip is essential in reducing the size and weight of the particle. Luciola is applied to a self-luminous pixel in a mid-air display and drawings of characters in mid-air are demonstrated.
Exhibition content
Luciola is a light-emitting particle moving in mid-air through acoustic levitation using two 40-kHz 17 x 17 ultrasonic transducer arrays placed face-to-face at a distance of 20cm and wirelessly powered by 12.3-MHz resonant inductive coupling. Luciola is applied to a self-luminous pixel in a mid-air display and drawings of characters in mid-air are demonstrated.
