Mk-3 Navigation System On-Board Monitor with Widescreen Display Chapter 6 P.8
Course Contents/Background Material
© BMW AG, Service Training
The transmission principle
The transmission principle is used in LC displays which have
been manufactured using TFT technology.
The LC display is illuminated from behind by a vacuum
fluorescent lamp. The light from the fluorescent lamp is
distributed uniformly using a diffuser sheet. It radiates through
the polariser and the transparent electrodes to the RGB
transistors. The RGB transistors are controlled by a "colour
matrix". The corresponding image is displayed on the monitor
interface according to RGB transistor control.
Backlight is always necessary to display an image.
Fig. 1: The transmission principle with LC displays
Index Explanation Index Explanation
1 Fluorescent lamp 8 Liquid crystal layer
2 Polariser 9 Delaying film
3 Transparent electrodes 10 Diffuser sheet
4 Microreflective electrodes R RGB colour filter, red
5 Delaying film G RGB colour filter, green
6 Polariser B RGB colour filter, blue
KT-5858
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