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Originally Posted by Cyberman tM
Outing my ignorance here, but why is it considered to be a problem to create a braile "display" ?
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A lot of precision mechanics is needed. That is expensive. And the number of pieces is very low, so the development costs are a much bigger Part of the price then normally.
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At the most basic level, isn't all you need basically a huge dot matrix printer that doesn't immediately retract the pins? (And, of course, not have sharp points.)
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You don't know what are you talking off. Look at "Refreshable braille display" in the wikipedia. You will see it isn' like a huge dot matrix printer.
And look at "Braille e-book". There you see how an ebookreader must look like.