About a year ago, I was asked to test some computer monitors for recycling purposes. One of the tests required degaussing the screens from a button or screen menu. This test, I was told, removed static electricity from the screens (and momentarily warped the display--artistically beautiful but confusing).
Does anyone know the name of the principle by which the static electricity accumulates on monitor screens (glass or LCD or whatever)?
A CRT is an electron gun - it fires electrons at the screen. The glass acts as a giant capacitor and can store charge. This allows a Potential Difference to build up between the glass and the common ground.
So degaussing essentially means completing the circuit between the screen and the power source, or between the screen and the grounding?
Edit: Also, does this apply to LCD screens as well?
I understand electrons do not pass THROUGH normal glass?
Degaussing is essentially getting rid of any charge on the screen and gun so the screen has no potential WRT gun and therefore produces a true picture. If the gun and screen have different PDs then you are going to get the beam behaving badly.
Degaussing everyday is NOT a good idea. I do mine (1 have 3 26inch CRTs because they are fabby quality, cost peanuts, and I have a big area. I probably degauss them about once a month.