This is how really big video walls were made in the 1980. Let start with a puzzle: is there any technology available that emits blue light and can be switched on and off really fast, without the filament lag of a tungsten lightbulb? The history of really big video walls is a subject we were going to cover while waxing enthusiastic about Sony superlative CLEDIS display, which from a distance of more than a few feet is the closest thing to a perfect picture we have seen to date. A coil of neon (well, argon) tube might work, but it not that bright, and it not that easy to control the high voltage in the context of a single sub-pixel on a video display.
Coat the inside of the tube with blue-emitting phosphor and you have created a very complicated blue lightbulb - albeit one that can be….