Mechatronics Braille display

Abstract

Mechatronics Braille display is a device that displays Braille characters for blind and visually impaired to read by touching. A Braille character consists of six or eight dots in a rectangular array 3*2 or 4*2 , the height of the dot is controlled by a piezoelectric bimorph underneath . Electrical signals stimulatet the piezoelectric bimorphs to bend up or down, consequently causing the dots to rise or fall, creating the Braille characters . USB port used to get the data from PC, and send it to microcontroller. Mbed microcontroller is used to process the entered text and convert it to Braille code , then it used as a controller of the system for controlling the piezoelectric Braille cell. The device is built and tested with number of blind and visually impaired . The results prove the performance , applicability of the device functions with blind/visually impaired need of the device.