EYE-LCD7000 / 8200
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8.
GUIDELINES FOR THE USE OF THE DISPLAYS TO AVOID UNDESIRED EFFECTS
8.1 Introduction
Thanks to their flexible possibilities of usage, their minor space requirement and their reliable display
performance the displays of the EYE-LCD Series have become more and more popular for a wide range of
applications. Whether you wish to display video or computer signals - any kind of data can be shown on our TFT
LCD screens - highly reliable and in perfect image quality. The displays have been especially designed for the
sophisticated use in professional long-time applications. All included technologies, components and functions
were chosen for their durability for continuous operation and capability to create best display performance.
Even so we have tried our best to provide a perfect display using latest technology and high-end components,
it is possible that certain circumstances, especially inappropriate usage of the display, may cause sustainable
damage to the image quality of the display.
The panels contained in LCD displays (Liquid Crystal Display) may cause so-called “memory effects” (or “ghost
images”) if static images are displayed for longer periods. This phenomenon occurs quicker on bigger LCD
monitors (>30”). On smaller LCD monitors it needs more time to occur. As far as we know today, it is not possible
that the image gets “burnt-in”, but there are hardly any long-term experiences with this problem. What can be
said is that there is the possibility of “memory- effects” if the displays are switched on for longer periods showing
the same static image. These memory-effects look similar to “burnt-in” images on traditional CRT’s.
The longer and LCD cell is stimulated mode without a pause, the slower it gets when the stimulating currency
is taken away (-> “memory-effect”). The LCD cell does not return completely to its stand-by mode and therefore
still lets pass some of the incoming light which leads to these ghosting images.
Unlike real burnt-in images on CRT screens these ghost images on LCD screens disappear when the display is
switched off for a while. The ideal solutions would be to switch the screen of for the same time as it has been
operated with the static image. In fact the ghost image will disappear after this procedure, but the more often
such memory effects occur the shorter gets the time until they appear again. If you think about the monitors on
your desk, even if they are smaller, a screen saver is used and this is to avoid the memory effect.
This brochure contains several tips and tricks that help you to avoid this memory-effect. These advices do
not guarantee that there will never be any memory-effects on your display. These unwanted effects that may
happen to the displays are not a specific problem of the EYE-LCD Series. The problem is caused by the LCD/TFT
technology itself and therefore applies to the products of all LCD producers.
As noted in all our offers, memory effects are not covered by any granted warranties.
Memory effects are not considered as defects or faults in terms of our warranty conditions, even not if
you have strictly adhered to the instruction given in this brochure.
This is today’s state of art. As far as we know there is no provider of LCD display panels who can guarantee that
no memory effects occur with these panels when static images are displayed.
