Texas Instrument had an invention about a bubble method, which they said they
were not going to use, and that it was free to anyone who wanted to develop a
braille display.
As that was two years or four?? and I've heard no more after hearing that
someone was working on it, I assume that it didn't get developed.
But yes, other ways are there. The oldest machines used electromagnets, hot,
and bulky. A fellow has even recently tried a device where 4 pins were moved
to scan a fixed finger, rather than the hand moving. I suspect it was hard to
learn/adapt.
Braille Dots are like a dull pencil point, spaced 1/8 inch, in a 6 dot (Or
8 sometimes) rectangular pattern. Not much force required, as finger very
sensitive.
Will
On Monday 21 July 2003 11:20 pm, Nick Nelissen wrote:
> Thanks for that description.
> Could you tell me how large each dot would be and how much downward
> pressure would it have to resist?
> I am thinking that there may be other ways to do this. As an example, some
> alpha-numeric displays for outdoor use are electro-mechanical in that they
> swing a little colored disk around behind a black half disk to show on and
> off. This of course is not the same as raising a dot, but it would be
> interesting if there is already an actuator out there in some mass produced
> piece of equipment that could be used.
>
> Thanks,
> Nick
>
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