From MIT Technology Review:
An inexpensive, full-page Braille tablet could make topics like science and math more easily accessible to the blind, according to a team of researchers who have built a prototype device.
The device, which is under development at the University of Michigan, uses liquid or air to fill tiny bubbles, which then pop up and create the blocks of raised dots that make up Braille. Each bubble has what is essentially a logic gate that opens or remains closed to control the flow of liquid after each command.
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Existing refreshable Braille displays tend to max out at one line of text and cost several thousand dollars. They use plastic pins pushed up and down by a motor. The Michigan team found it impossible to pack the pins in densely enough to create a reasonably sized full-page display, and as a result started from scratch with the microfluidic option. The switch could help them make the final product tablet-sized instead of laptop-sized, like existing refreshable displays.
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“My observation is that, currently, even many of us who read Braille well find reading it with single-line Braille displays slower and more tiring than using text-to-speech or audio materials,” says Chris Danielsen, a spokesperson for the National Federation of the Blind. “I think this would dramatically change with a larger display, especially one at a reasonable price point.”
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“Anything where you want to be able to see stuff written down, like coding or music or even just mathematics, you really have to work in Braille,” says O’Modhrain, who is visually impaired. “That just means for a lot of people these things are not accessible or not available.”
Link to the rest at MIT Technology Review