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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" ?
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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Dotmatrix printers had rather tiny area for the dotmatrix, it was just moved around a lot.
Problem is that such reader would need to be either mechanical or use some other deforming technique. Neither one which scales in cost and size like LCDs or E-inks do.
The real issue is that it's a real niche market. Making device only for blind readers. The non-blind audience for such is probably even smaller... Developing costs money and if you can spread that over large number of devices those costs can be prohibitive.