Image Persistence; Placement And Adjustment Of The Monitor - Advantech PAX-355-C8 Series User Manual

4.2

Image Persistence

Image persistence is when a residual or ghost image of a previous image
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remains visible on the screen. Unlike CRT monitors, LCD monitors' image per-
sistence is not permanent, but constant images being displayed for a long
period of time should be avoided.
To alleviate image persistence, turn off the monitor for as long as the previous
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image was displayed. For example, if an image was on the monitor for one hour
and a residual image remains, the monitor should be turned off for one hour to
erase the image.
Note!
As with all personal display devices, Advantech recommends using a
moving screen saver at regular intervals whenever the screen is idle or
turning off the monitor when not in use.
4.3

Placement and Adjustment of the Monitor

Caution!
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Note!
This device generally does not require the user to install software. Any
modification of the internal firmware must only be done following specific
procedure provided by Advantech.
Note! The configuration of the device should mainly be done by the user using
the provided hardware keypad.
For optimum performance of the system, one hour warm-up is rec-
ommended.
Adjust the monitor height so that the top of the screen is at or
slightly below eye level. Your eyes should look slightly downward
when viewing the middle of the screen.
For optimal view, 20-inch distance from your eyes to the screen is
recommended.
Rest your eyes periodically by focusing on an object farther away
and blinking often.
Position the monitor at a 90 degree angle to windows and other
light sources to minimize glare and reflections. Adjust the monitor
tilt so that ceiling lights do not reflect on your screen.
You can use an anti-glare filter to have a better view out of the
reflected light.
Clean the LCD monitor surface with a lint-free, non-abrasive cloth.
Avoid using any cleaning solution or glass cleaner.
Adjust the monitor's brightness and contrast controls to enhance
readability.
Avoid displaying fixed patterns on the monitor for long periods of
time to avoid image persistence (residual image).
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