Well... there's CRT monitors, LCD's, now Plasma. I researched on how Plasma screens work, and it says there that each pixel is made of 3 subpixels, with each having the primary colours. Each subpixel is like a small neon light. It has this really small tube filled with neon or xenon, and one side, the glass tube is coated with colourful phosphour that emits visible light when the UV light from the neon gas hits it. Anyways... well i thought that instead of having these thousands of tubes...