Deep within the monitor....?

Question

..."farther" than pixels are even smaller lights, like RGB colors

(similar to: http://www.spectroscopynow.com/ftp_images/Pixels_3.jpg)

My question is, are these RGB "background pixels" full, solid, and all perfect, or do they have minor imperfections, but are too small to notice/affect the actual image produced by the monitor (the one you see from 2/3 ft. away?

Thanks for your time.

Answer 1

Hi. I will assume you mean a CRT. The back end of a CRT tube has heated elements which generate a beam of electrons. There are three beams, one for red, green, and blue. The beams are focused by a magnetic coil and directed to sweep across the screen in many lines from top to bottom by other coils. Near the front of the tube is a screen with holes perforated through it. These tiny holes only allow a concentrated beam of electrons to strike the three phosphor dots on the back surface of the glass tube. Perfect? Nothing is perfect. But they are uniform enough that the human eye cannot see the imperfections. (An LCD works in a much different way.)