[BRLTTY] Dimensions of braille displays

[Nicolas Pitre]

On Tue, 28 Nov 2006, Mario Lang wrote:

> Nicolas Pitre <nico at cam.org> writes:
> 
> >> I'm wondering which dimensions a braille display can ha2e, in cells.
> >> Those I know typically are one-line-displays, the number of columns
> >> varying between, say, 18 and 80 cells. Are there other geometries
> >> available ? If the answer is Yes, which models use these geometries ?
> >
> > The Bookworm has 8 cells.
> >
> > I saw a multi row braille display only once.  It was a prototype only 
> > demonstrated during a trade show.  Its refresh rate was impossibly slow 
> > and its price was approaching the hundred thousands dollars.  In other 
> > words, all practical braille displays only have had one row so far.
> 
> That is not quite right.  I remember a 2x40 display by a company called
> EHG, if I remember correctly.  Or the product was called EHG, at least
> it was sold in the 90s in europe.  And there is the HandyTech GWP (graphic
> window professional) which has a matrix of dots for displaying graphics.
> I dont remember the dimensions, but if you drive it like a braille display, you
> surely get several lines of approx. 20 or 30 chars...

Really?  How much do they sell it?


Nicolas