21 Oct
2019
21 Oct
'19
1:30 p.m.
On Mon, Oct 21, 2019 at 12:49 PM Paul Koning via cctalk
<cctalk at classiccmp.org> wrote:
I've got a VT100 with a (3rd party?) IR-LED based touch screen which
fits into the normal black bezel around the tube.
Pat
And what sort
of technology was that screen using? I expected to see
the grid array of outer infrared LEDs and detectors that I vaguely remember
from that era, but I don't see that here. Someone was making a tube
that was coarsely touch-sensitive?
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.