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Abstract The blind mainly relies on Braille books to obtain text information. However, Braille books with invariable content are ponderous and inconvenient to read. Hence, it is essential to find a safe, simple and effective method to develop new Braille devices. This advanced method promises to be the next generation Braille book that is refreshable, flexible, and portable. Therefore, a safe dielectric elastomer Braille device actuated by a triboelectric nanogenerator is designed. It is easy to fabricate, inexpensive, and safe without any potential hazard for blind people. For triboelectric nanogenerators, the friction between two thin films can generate a voltage over 3 kV with a current of just 2 µA to deliver a shape change of the dielectric elastomer membrane. In the meantime, with the support of the pressor air in the chamber, the membrane will be raised up to be a touchable Braille dot. In addition, a programmed switch matrix is designed to control the Braille device with multiple dielectric elastomer dots to realize complicated refreshable display, providing a possibility of a page‐size and portable braille e‐book for the blind in the near future.
Qu et al. (2020) studied this question.