13th June 2006, 7:22 PM
THAT explains it!
http://en.wikipedia.org/wiki/Shadow_mask
I've always wondered why moving the image around and resizing it on a CRT screen computer moniter doesn't cause the colors to constantly change repeatedly, like a rainbow. Turns out that the 3 electron guns, which otherwise are functionally identical, only have one real difference, their location inside the tube (duh), and the two masks are designed around the "angle of attack" from each of these 3 guns, since their different location means the light enters at a different angle. Essentially, light from one of the guns is "blocked", no matter how the magnetic field inside it happens to adjust it, so no angles that are possible with magnetic adjustment will ever get inside the specific place of a red phosfor for either the blue or green phosphors to enter it.
Neat, another riddle solved.
http://en.wikipedia.org/wiki/Shadow_mask
I've always wondered why moving the image around and resizing it on a CRT screen computer moniter doesn't cause the colors to constantly change repeatedly, like a rainbow. Turns out that the 3 electron guns, which otherwise are functionally identical, only have one real difference, their location inside the tube (duh), and the two masks are designed around the "angle of attack" from each of these 3 guns, since their different location means the light enters at a different angle. Essentially, light from one of the guns is "blocked", no matter how the magnetic field inside it happens to adjust it, so no angles that are possible with magnetic adjustment will ever get inside the specific place of a red phosfor for either the blue or green phosphors to enter it.
Neat, another riddle solved.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." ~ Charles Babbage (1791-1871)