The 6.5” Rear Display is the central display unit for the 'Rear Entertainment' equipment. With 'Rear Entertainment' equipment, the layout and function of the display and operating concept for the rear correspond to the display and operating concept for the front. The user interface of the displays is the same. However, the Rear Display is operated exclusively via the Rear Controller.
The 'Rear Entertainment' scope of functions (for beginning of series production 03/2002) that are displayed and can be operated are:
The Rear Display consists of a folding arm and an LCD display. The Rear Display is fitted symmetrically on the center console and can be used for left-hand drive and right-hand drive vehicles. The FD can be folded into the resting position and, to permit use of a skibag, can be folded downwards.
Folding arm: The mechanical folding arm is secured to a lock module in such a way that it can be rotated. The folding arm with the Rear Display can be folded upwards for operation. The position folded up or down is detected by a Hall sensor in the arm joint.
LCD display: The LCD display is fitted in a casing. A photocell is built into the casing for measurement of the surrounding brightness. Depending on the surrounding brightness, the brightness of the LCD display is regulated (dimmed).
NOTE: For series launch 03/2002, only DVD video and TV output is possible on the Rear Display in the E66.
The Rear Display control module controls all the functions of the Rear Display. The Rear Display CU is integrated in the MOST framework. The rear control module also contains the power supply for the Rear Display. The Rear Display CU is fitted beneath the Rear Display in the center console.
In principle, the rear center console switch center has the same function as the front center console switch center. The BZMF contains the Rear Controller. The BZMF also contains the rear center armrest switch blocks and the headphone connection module.
The Rear Controller is the control panel for operating the 'Rear Entertainment' functions on the Rear Display. Operation and structure of the Rear Controller are identical to those of the Controller in the front. However, the functions for front and rear are different.
The K-CAN SYSTEM data bus is the data connection between the instrument cluster and the control modules in the chassis and suspension, drive and body sections. Information is exchanged with data telegrams.
The MOST (Media Oriented Systems Transport) bus links the audio, video and navigation systems. Information relating to function requests is transmitted to the relevant control modules by means of MOST bus messages.
Starting: The 6.5” Rear Display can be started if
It must be folded up or down manually. Pressing the top edge of the display audibly unlocks the lock module. On the folding arm, the Rear Display can be tilted or swiveled by +/-20 degrees.
When the Rear Display is powered up, the same display appears as in the Front Display. The Rear Controller can then be used to select a function.
NOTE: The Rear Display can also be operated with terminal 30. Here, the system must have been activated by the ON/OFF switch in the ASK.
Setting the brightness: A photocell is built into the casing of the LCD display for measurement of the surrounding brightness. The value determined by the photocell is compared with the set brightness values. If there is a difference between the values, the display is adapted to the ambient brightness by brightening or darkening. This process ensures good visibility of the shield at all times.
The rear control module is supplied with a number of data formats. Digital data packets, e.g. travel guides, are supplied via the MOST connection. The rear control module receives the analog video signal from the video module via an RGB input. The control signals come the K-CAN SYSTEM data bus
The Rear Display control module generates digital picture data. The digital picture data is transferred across an LVDS cable (Low Voltage Differential Signaling - for transmission of digital images, digital RGB cable) for graphical representation on the Rear Display. The Rear Display is supplied with voltage and control data of the K-CAN SYSTEM data bus across another cable.
The functions in the vehicle are provided by various control modules. The users in the rear access the same control modules as the users in the front. In order to prevent conflicts when accessing one function, rules have been laid down for certain functions (see: Headphone interface functions).
If a certain voltage is not reached in the vehicle battery, the power module switches the 'Rear Entertainment' equipment off.