BMW ON-BOARD MONITOR AND NAVIGATION SYSTEMS FOR E38 E39 E46 E53 User Manual download pdf (Page 46)

Mk-3 Navigation System On-Board Monitor with Widescreen Display Chapter 6 P.5

Course Contents/Background Material

The function principle of a TFT display

Fig. 5: LC display in TFT technology

The light from the fluorescent lamp is distributed evenly via a

diffuser sheet. This light is polarised by the polariser (10). The

electric field between the electrodes (7 + 9) aligns the LC

molecules. The light strikes the second polariser depending on

transistor control via the "LC colour matrix". The "colour

information" available here makes it possible to create an image.

The sharpness of the image is dependent on the LC display type

and its resolution (pixels), for example.

Index Explanation Index Explanation

1 Glass sheet 7 Electrode

2 Thin Film Transistor (TFT) 8 LC crystals

3 Spacer 9 Electrode

4 Polariser 10 Polariser

5 Glass sheet 11 Diffuser sheet

6 Colour filter 12 Fluorescent lamp

KT-5862

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 56 57

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BMW ON-BOARD MONITOR AND NAVIGATION SYSTEMS FOR E38 E39 E46 E53 User Manual Page 46