Advantages of the EYE-LCD Series over other technologies
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Differences TFT/LCD vs. Plasma
All displays from the EYE-LCD Series are based on the LCD/TFT technology
(“Liquid Crystal Display“/ “Thin Film Transistor“). Unlike plasma displays that
bear the risk of irreversible “burn-in”-effects, it is almost impossible that similar
effects happen to LCDs. But it is possible that temporary “ghost images” can be
seen on a LCD when static image content is represented for longer periods.
This effect is called “Temporary Image Retention” (TIR) or in its worst version
“Image Sticking“.
To get a comprehensive understanding of the “image retention” effect it helps
to have a closer look on the LCD/TFT technology.
The LCD/TFT Technology of the EYE-LCD Series:
The backlight used in eyevis LCD/TFT technology, consisting of either CCFL or
LED, is placed behind several different filter layers and a polarisation filter. In
colour LCDs each individual pixel is divided into three cells, or sub-pixels,
which are coloured red, green and blue, respectively, by additional filters
(pigment filters, dye filters and metal oxide filters). Each sub-pixel can be
controlled independently and millions of possible colours can be generated for
each pixel. If voltage is connected to a pixel, its polarisation gets changed. This
changes the light-flow and the pixel on the screen gets its colour. To achieve a
harmonic brightness over the entire screen area it is important to provide a
balanced distribution of the light from the backlight. Then again, the light is
transmitted through the back polarisation filter which is passable in only one
direction. Single sub-pixels can be activated or deactivated by connecting a
small voltage to the thin film transistor (= TFT) of each of these sub-pixels. This
small voltage turns the liquid crystals. This allows transmitting varying
amounts of light through the colour filters and the front polarisation filter.
Sub-pixels typically distinguish 8- or 10-Bit grey levels between completely off
and on. If the sub-pixel TFT is not activated no light will pass the front
polarisation filter which has a 90° turned phase compared to the back
polarisation filter.
In contrast to the irreversible “burn-in”-effects with static images on plasma
screens, LCD/TFT screens are only affected by temporary image disturbances
when they are used in the same way. This temporary image retention can be
eliminated by following the advice given below.
The image retention-effect is caused by a persistence of the displayed image.
This persistence is caused by minimal electric rest voltage inside the LCD
module. Therefore the previously displayed image remains visible on the next
image.
As already mentioned, this image retention-effect is reversible. The best advice
we can give you is probably not to let this effect occur to your display at all.
This leaflet gives you the relevant information you need to avoid the
appearance of image retention on your LCD/TFT display.
EYE-LCD-4600/5500-LE-700
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User Manual
Summary of Contents for eyeLCD-4600-LE-700
Page 64: ...EYE LCD 4600 5500 LE 700 64 APPENDIX DIMENSIONS EYE LCD 4600 LE 700 ...
Page 65: ...EYE LCD 4600 5500 LE 700 65 APPENDIX DIMENSIONS EYE LCD 5500 LE 700 ...
Page 69: ...EYE LCD 4600 5500 LE 700 69 Appendix Wall Mount Safety Notes ...
Page 70: ...EYE LCD 4600 5500 LE 700 70 ...
Page 81: ...Notes Notizen ...
