Siemens SIMATIC IFP1500 Operating Instructions Manual page 21

TFT displays
NOTICE
Burn-in effect and backlight
A permanent picture with bright images can result in a burn-in effect. The longer the same
content is displayed on the screen, the longer it will take for the burn-in effect to disappear.
Screen savers that active black when the backlight is on (e.g. starfield simulation), reduce
the burn-in effect. The brightness of the backlight decreases incrementally during its
operational life.
You can extend the service life of the screen and the backlight with the following measures:
 Activate the screen saver.
 Also reduce the backlight.
 Pay attention to the length of time the backlight is activated.
Defective pixels in the display
The manufacturing process of modern displays does not currently guarantee that all pixels of
the display are perfect. It is therefore inevitable that the display will contain a small number
of defective pixels. This does not limit the function in any way provided the defective pixels
are not all in one location.
Additional information is available in the section "General Technical Specifications".
Industrial Flat Panel IFP1500, IFP1900, IFP2200
Operating Instructions, 09/2012, A5E31298376-AA
Safety information
2.3 Notes about usage
21