There should have been a video here but your browser does not seem to support it. Over a number of years, I’ve experimented with various projects which use luminous paint and ultra violet LEDs to make raster or vector displays. You can see an indifferent video of the very first one here: As these displays were mainly intended as installations at Maker Faires and EMF Camp, they tended to be on the big side, around 2 metres long and 500 mm to 1.