Touchscreen Mobile Phones Virtual Keyboarding for People with Visual Disabilities

  • Agebson Rocha Façanha
  • Windson Viana
  • Mauro Cavalcante Pequeno
  • Márcia de Borba Campos
  • Jaime Sánchez
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8512)


This paper presents the design and initial evaluation of a Braille virtual keyboard which allows text input on touchscreen devices such as smartphones and tablets. The virtual keyboard, called LêBraille, is a metaphor of the Braille writing system that uses audio and vibration feedbacks to promote accessibility for people with visual disabilities. We integrated this keyboard into two mobile applications and implemented an initial usability evaluation with nine people with visual disabilities. The evaluation comprised activities including a comparison of text input in three types of keyboards (physical keyboard, alpha numeric virtual keyboard, and LêBraille). Initial results indicates that writing activities can be as fast as a virtual keyboard depending on the Braille expertise of the user and the degree of blindness, however, the writing pace with a virtual keyboard is lower than the writing pace with a physical keyboard.


Accessibility Mobile Computing Braille 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Agebson Rocha Façanha
    • 1
  • Windson Viana
    • 2
  • Mauro Cavalcante Pequeno
    • 2
  • Márcia de Borba Campos
    • 3
  • Jaime Sánchez
    • 4
  1. 1.Instituto Federal de Educação, Ciência e Tecnologia do CearáBrasil
  2. 2.Universidade Federal do CearáBrasil
  3. 3.Pontifícia Universidade Católica do Rio Grande do SulBrasil
  4. 4.Universidad de ChileChile

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