Thread: LCD monitors
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Unread 21-11-2005, 11:03
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Al Skierkiewicz Al Skierkiewicz is offline
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Re: LCD monitors

Quote:
Originally Posted by robot180
After some more research, I found one problem that was mentioned about some LCD monitors in some customer reviews. A few people complained of "burn out".
Jon,
The correct term is "burn in" and is a holdover from regular CRT type screens. With those devices, the constant bombardment of the screen with electrons caused heating of the phosphor and discoloration. In CRT's this is semi permanent condition that can be repaired with a full white screen for several hours. It doesn't make it better, it simply makes the whole screen the same discoloration. On LCD's the same kind of heating takes place and as liquid crystals are temp sensitive they exhibit a memory effect. After the screen has sufficient time to cool all the crystals down to the same temp, the effect dissipates. A screen sitting on the same high contrast video for days and weeks on end will pick up permanent "burn in".
Plasmas are the worst of the bunch, in that bright spots tend to cause more depositation of cathode material on the faceplate. Think of it as smoke adhering to the inside of the glass faceplate. The only fix is to remove the face and clean the glass. Since this is still impossible, plasmas for all their other benefits are not the display of choice. As the "smoke" gathers on the glass, resolution and apparant focus degrades.
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