B&R Industries Power Panel 300, User Manual

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Maintenance / Servicing • Preventing after-image effect in LCD/TFT monitors
Power Panel 300/400 User's Manual V 2.30
3. Preventing after-image effect in LCD/TFT monitors
Burn-in effect (after images, display memory effect, image retention or also image sticking)
occurs in LCD/TFT monitors when a static image is displayed for a long period of time. This static
screen content causes the build-up of parasitic capacities within the LCD components that
prevent the liquid crystal molecules from returning to their original states. This condition may
arise, is not predictable and depends on the following factors:
• Type of image displayed
• Color composition of the image
• Length of image output
• Ambient temperature
3.1 What measures can be taken against this?
There is no total solution, however, measures can be taken to significantly reduce this effect:
• Avoid static pictures or screen content
• Use screen savers (moving) when the display is not in use
• Frequent picture change
• Shut off the display when not in use
Turning off the background lighting (backlight) does not influence the prevention of the after-
image effect.