Re: Anyone familiar with these vintage touchscreens?

[Paul Koning via cctalk]

> On Oct 21, 2019, at 12:51 PM, Tony Duell via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
>> Theinfrared array you're thinking of was invented at PLATO, for flat panel 
>> (plasma) displays.  They don't work for CRTs because of the convex screen.
> 
> My HP150 will have to disagree with you there.
> 
> -tony

I suppose it depends on "how convex" and how far you're willing to place the IR 
grid from the screen.  In any case, the IR touch panels from PLATO plasma 
displays were not carried forward to the CRT based IST terminals.  Perhaps CDC 
liked their technology better even though both could have worked; at this point 
the reasons why are probably hard to discover.

        paul