BMW ON-BOARD MONITOR AND NAVIGATION SYSTEMS FOR E38 E39 E46 E53 Bedienungsanleitung Seite 48

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Mk-3 Navigation System On-Board Monitor with Widescreen Display Chapter 6 P.7
Course Contents/Background Material
© BMW AG, Service Training
The function principle of an Ad-TFT display
The name Ad-TFT means Advanced Thin Film Transistor. An
Ad-TFT display uses the light from internal and external light
sources to display an image. This light is "controlled" so that the
human eye can detect the colours on the display.
The significant differences (structural) compared to a TFT
display are a delaying film and a microreflective layer.
Ad-TFT LC display technology
Two technologies are used for an Ad-TFT LC display. These
technologies are
LC display background lighting (transmission)
Reflection of ambient light.
Near constant contrast under all ambient lighting conditions of
up to 50000 lx is achieved by a combination of the two
technologies (transflection). This light level corresponds to direct
solar radiation.
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