On Mon, Oct 21, 2019 at 12:49 PM Paul Koning via cctalk <cctalk@classiccmp.org> wrote: > > 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.
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
