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Foreword
2.2 General information
Sources of light
Notice
Position the screen so that it is not subject to direct sunlight or other strong sources of light.
Defective pixels in the display
At present, the manufacturing process of modern displays does not guarantee that all pixels
of the display will be perfect. A small number of defective pixels in the display is therefore
unavoidable. This does not present a functional problem as long as the defective pixels are
not bunched in one location.
Further information is available in the section "General technical data" of the "Technical
data" chapter.
Burn-in dffect on TFT displays
A permanent picture with bright images can lead to a burn-in effect on the TFT LCD.
If a screen saver is activated, please observe the following:
• The liquid crystals in screen savers which actuate active black when the backlighting is
• The following applies to screen savers which turn off the the backlighting: Each time the
Consider the following carefully:
• Screen saver
• Switch off the backlighting regularly
• Permanent display of the customer application
2-8
on, e.g. flying stars "starfield simulation," renew themselves. Pay attention to the length of
time the backlighting is activated
backlighting is turned on, its life is reduced by 50 minutes.
Operating instructions, Release 07/2006, A5E00877780-01
SIMATIC Panel PC 877
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