The lack of eyesight is a severe obstacle faced by the blind and limits their access to technology. Developments in assistive technology can be traced from the implementation of braille through engraving and embossing the script. With the growth of digital age, braille is included in keyboards and number pads and more recently as mechanical refreshable braille displays with integrated audio systems . However, such systems are extremely expensive to purchase and maintain. Existing displays have a very low resolution and are bulky . This project explores developments in ferrofluids, a type of magnetorheological liquid, and its possible applications in a magnetically controlled display layer. Also, electromagnets are used instead of conventional neodymium magnets. Variations in the coil shape and base shape are also explored. The aim is to achieve dimensions closer to existing mechanical braille systems. The models considered are analysed on COMSOL Multiphysics software . Considerable improvement is achieved in reducing size to improve resolution. There is vast scope for further research in improving the system for commercial viability.
cited By ; Conference of 1st International Conference on Robotics and Automation for Humanitarian Applications, RAHA 2016 ; Conference Date: 18 December 2016 Through 20 December 2016; Conference Code:128160
N. Tamilarasan, Dr. Thirumalini S., Nirmal, K., Ganapathy, K., Murali, K., and Srinath, H., “Design and Simulation of Ferrofluid Tactile Screen for Braille Interface”, in International Conference on Robotics and Automation for Humanitarian Applications, RAHA 2016 - Conference Proceedings, 2017.