LCD Monitor Image Retention

This question has come up from time to time about LCD monitor and TV
technology.

LCD displays cannot be burned in like with CRT and Plasma type
displays. LCD displays can however, retain a ghost effect of the images
that have been affixed on to the display for a long period of time. The
effect of the image retension is from an accumulation of charge
retained by the pixels.

If the monitor is left running with a screen saver, or some type of
moving image, after a period of time it should clear itself.

There are a number of methods of clearing the retention problems. Using
a screen saver will prevent the retention effect, and will allow it to
clear itself. Having the monitor sit with a blank screen, but be
powered up is another way that is said to clear the retention effect.
Leaving the monitor powerd off for a long period of time, may also
clear the retention effect.

LCD retention can take a number of weeks or a few months to be cleared.
This type of effect is not permanent.

With CRT and Plasma screens, image retention is actualy a screen burn.
This is where the phosphors have been burnt. There is no possible fix
other than replacing the display device. The cost of this type of
repair is usually too expensive in relation to the replacement cost of
the monitor.


A Reference About LCD Retension:
http://service.dell.com/dell/kb/tech_support/view_article/1,,6073+5818+5828+19153,00.html


Some Myths And Facts:
http://hometheater.consumerelectronicsnet.com/articles/viewarticle.jsp?id=25018



Jerry G.

.

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