Braille Display by Lateral Skin Deformation with the STReSS2 Tactile Transducer

Earlier work with a 1-D tactile transducer demonstrated that lateral skin deformation is sufficient to produce sensations similar to those felt when brushing a finger against a line of Braille dots. Here, we extend this work to the display of complete 6-dot Braille characters using a general purpose 2-D tactile transducer called STReSS2 . The legibility of the produced Braille was evaluated by asking seven expert Braille readers to identify meaningless 5-letter strings as well as familiar words. Results indicate that reading was difficult but possible for most individuals. The superposition of texture to the sensation of a dot improved performance. The results contain much information to guide the design of a specialized Braille display operating by lateral skin deformation. They also suggest that rendering for contrast rather than realism may facilitate Braille reading when using a weak tactile transducer.

• Type: Conference
• Year: 2007
• Where: HAPTICS
• Authors: Vincent Lévesque, Jérôme Pasquero, Vincent Hayward
• Keywords: Braille, HAPTICS 2007, Lateral Skin Deformation, Tactile Transducer, Virtual Reality