Refreshing Refreshable Braille Displays

• Published in: IEEE transactions on haptics Vol. 8; no. 3; pp. 287 - 297
• Main Authors: Russomanno, Alexander, O'Modhrain, Sile, Gillespie, R. Brent, Rodger, Matthew W. M.
• Format: Journal Article
• Language: English
• Published: United States IEEE 01.07.2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Actuators; Adult; Blindness - rehabilitation; Blinds; Braille; braille reading; Computer Simulation; Cues; Data Display; Displays; Errors; Female; Fingers; Haptic interfaces; Humans; Male; Mice; Middle Aged; Motion Perception - physiology; Pins; proprioception; Proprioception - physiology; Reaction Time - physiology; Readers; Reading; Refreshable braille displays; Searching; Self-Help Devices; Sensory Aids; Shape; shape displays; Skin; Sliding contact; Speech; Substrates; Texts; Touch; User-Computer Interface; Young Adult; Refreshable braille displays; sliding contact; proprioception; braille reading; shape displays
• ISSN: 1939-1412; 2329-4051
• DOI: 10.1109/TOH.2015.2423492

The increased access to books afforded to blind people via e-publishing has given them long-sought independence for both recreational and educational reading. In most cases, blind readers access materials using speech output. For some content such as highly technical texts, music, and graphics, speech is not an appropriate access modality as it does not promote deep understanding. Therefore blind braille readers often prefer electronic braille displays. But, these are prohibitively expensive. The search is on, therefore, for a low-cost refreshable display that would go beyond current technologies and deliver graphical content as well as text. And many solutions have been proposed, some of which reduce costs by restricting the number of characters that can be displayed, even down to a single braille cell. In this paper, we demonstrate that restricting tactile cues during braille reading leads to poorer performance in a letter recognition task. In particular, we show that lack of sliding contact between the fingertip and the braille reading surface results in more errors and that the number of errors increases as a function of presentation speed. These findings suggest that single cell displays which do not incorporate sliding contact are likely to be less effective for braille reading.