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Refreshable Braille Display Using Shape Memory Alloy With Latch Mechanism

[+] Author Affiliations
Pulkit Sapra, Ankit Kumar Parsurampuria, Suman Muralikrishnan, Varan Gupta, M. Balakrishnan, P. V. M. Rao

Indian Institute of Technology Delhi, New Delhi, India

H. Karthikeyan, K. Bhagavatheesh, Arun Venkatesan, Sashikumar Valiyaveetil

Phoenix Medical Systems, Chennai, India

Paper No. DETC2017-68311, pp. V009T07A040; 10 pages
  • ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 9: 13th ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications
  • Cleveland, Ohio, USA, August 6–9, 2017
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5823-3
  • Copyright © 2017 by ASME


Refreshable Braille Display (RBD) is a device that enables people with blindness to access digital textual content through tactile interface. The use of commercially available RBDs is restricted to affluent individuals and organizations due to their high cost, which restricts their penetration in developing nations. Braille displays based on shape memory alloy actuators are a potential low cost alternative but face the challenge of high power consumption, heat accumulation and low response time. This paper proposes an SMA based actuator with a novel latching mechanism to make RBDs. It also discusses the design and production challenges addressed in making the RBD. It further compares the performance of the current prototypes with previous designs of SMA based RBDs.

Copyright © 2017 by ASME



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