Demonstration of Vibrational Braille Code Display Using Large Displacement Micro-Electro-Mechanical Systems Actuators

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概要

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• In this paper, we present a vibrational Braille code display with large-displacement micro-electro-mechanical systems (MEMS) actuator arrays. Tactile receptors are more sensitive to vibrational stimuli than to static ones. Therefore, when each cell of the Braille code vibrates at optimal frequencies, subjects can recognize the codes more efficiently. We fabricated a vibrational Braille code display that used actuators consisting of piezoelectric actuators and a hydraulic displacement amplification mechanism (HDAM) as cells. The HDAM that encapsulated incompressible liquids in microchambers with two flexible polymer membranes could amplify the displacement of the MEMS actuator. We investigated the voltage required for subjects to recognize Braille codes when each cell, i.e., the large-displacement MEMS actuator, vibrated at various frequencies. Lower voltages were required at vibration frequencies higher than 50 Hz than at vibration frequencies lower than 50 Hz, which verified that the proposed vibrational Braille code display is efficient by successfully exploiting the characteristics of human tactile receptors.

• 2012-06-25

著者

• Miki Norihisa

  JST PRESTO, Chiyoda, Tokyo 102-0076, Japan

• Watanabe Junpei

  Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan

• Ishikawa Hiroaki

  Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan

• Arouette Xavier

  Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan

• Matsumoto Yasuaki

  Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan

• Watanabe Junpei

  Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University

• Matsumoto Yasuaki

  Department of Electrical and Electronic Engineering, Toyo University

関連論文

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• Demonstration of Vibrational Braille Code Display Using Large Displacement Micro-Electro-Mechanical Systems Actuators
• Efficient plastid transformation in tobacco using small gold particles (0.07–0.3 µm)

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