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Display mechanism
A new display mechanism is used on the Audi Q7. Both
display versions have the same mechanism.
The display versions have the following features:
•
7.0" TFT color monitor with 800 x 480 pixel resolution.
•
8.3" TFT color monitor with 1024 x 480 pixel resolution.
The mechanism itself comprises:
•
Display Opening/Closing Motor V301.
•
Display -Open- Stop Switch F330.
•
Display -Closed- Stop Switch F331.
•
Hall-effect sensor for position recognition.
•
Guide pin.
•
Lifting arms.
•
Springs (for backlash compensation and as weight
balancing for support when extending the display).
Functional principle
When the display extends, the electric motor drives a lifting
arm. The second lifting arm is connected to the first lifting
arm by a rack segment (scissors principle) and thus also
moves upwards. The current position of the display is deter-
mined by a Hall-effect sensor.
The electric motor speeds up after travelling a certain
distance and slows down again before reaching its end
position.
Shortly before reaching the upper end position, Display
-Open- Stop Switch F330 sends a signal. The electric motor
then continues turning until the Hall-effect sensor no
longer detects that the motor is running. The electric
motor is then deactivated.
This "run-on" feature ensures that the display is moved
firmly into its end position in order to prevent a rattling
noise.
The display retracts in the same way, with the electric
motor turning in the reverse direction.
Activation mechanism
The motor and both limit switches are activated by Multi-
media System Control Head E380. E380 transfers this data
to Information Electronics Control Module 1 J794. J794
evaluates the data and issues the appropriate commands.
50
Hall sensor
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