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Touchbox With Controller And Rear-Compartment Controller.



Touchbox With Controller And Rear-Compartment Controller.

Touchbox (TBX) with controller (CON) and rear-compartment controller (FCON)
A character identification is implemented in markets with a non-Arabic character set. A touchpad is also installed on the controller (CON) and the rear-compartment controller (FCON). For example, the character recognition is very useful for the input of navigation destinations.
A separate control unit is installed for the identification of characters, the Touchbox (TBX).
This technology will be used for additional vehicle functions at a later time. The controller with touchpad serves in combination with the headunit to select and configure a variety of vehicle functions.

Brief component description
The following components are described:
- Touchbox (TBX)
- Controller (CON)
- Rear-compartment controller (FCON) with left and right operating facility
- Touchpad

Touchbox (TBX)
The Touchbox (TBX) is a control unit for character recognition. The Touchbox is the interface between the controller and the rear-compartment controller and the headunit. The TBX processes the data coming from the controller Touchpad. During this, the main task is to identify the characters from the "point cloud" coming from the controller.
For example, the following fonts are currently supported:
- Asian
- European
- Cyrillic







Signal shape for character recognition: Controller (CON) > K-CAN2 > Touchbox (TBX) > K-CAN2 > Headunit High (HU-H)
The touchbox (TBX) is supplied with power from the front power distribution box with terminal 30B. The ground supply comes from the body.

Controller (CON)
The controller is the central operating element for the vehicle functions that can be selected and configured on the central information display. The control panel and control unit of the controller (CON) have been combined in one single component.
There are 7 fixed selector keys arranged around the controller. These selector keys now enable selection of half of all the submenus.
A touchpad is integrated on the controller. The term touchpad (keyboard) defines a touch-sensitive surface that can be used to replace keyboards, for example. Modern touchpads determine the position of the finger on the surface of the touchpad using electrical capacity.







There are a variety of degrees of operating freedom for the control panel available to navigate the menu structure:
- Turning
- Pressing
- Tilting

The controller is connected via the bus system with the headunit.
Signal path: Controller (CON) > K-CAN2 > Headunit High (HU-H)
The signal for the locator lighting (terminal 58g e.g. for the buttons) is transferred on the bus.
The controller (CON) is supplied by the front power distribution box with terminal 30B. The ground supply comes from the body.

Rear-compartment controller (FCON) with left and right operating facility
The rear-compartment controller is only used with a rear seat entertainment (RSE_ in the high version (e.g. F01, F02).
The rear-compartment controller is the central operating element for the vehicle functions that can be selected and configured on the rear seat entertainment. The control panel and control unit of the rear-compartment controller (FCON) have been combined to form one component. There are 7 fixed selector buttons arranged around the rear-compartment controller. These selector keys now enable selection of half of all the submenus.
A touchpad is integrated on the controller. The term touchpad (keyboard) defines a touch-sensitive surface that can be used to replace keyboards, for example. Modern touchpads determine the position of the finger on the surface of the touchpad using electrical capacity.
The left and right operating facilities are connected to the rear-compartment controller (10-pin plug connection on the back side each). The operating facilities are used to select the rear monitor to be controlled via the rear-compartment controller. A function indicator light indicates which operating facility is activated. The function indicator light is dimmed with the data bus.
A rotary control on the operating facility provides volume control.







There are a variety of degrees of operating freedom for the control panel available to navigate the menu structure:
- Turning
- Pressing
- Tilting

The rear-compartment controller is connected via the bus system with the rear monitor.
Signal path: Rear-compartment controller (FCON) > K-CAN2 > Headunit High (HU-H)
The signal for the locator lighting (terminal 58g e.g. for the buttons) is transferred on the bus.
The rear-compartment controller (FCON) is supplied with power from the front power distribution box with terminal 30B. The ground supply comes from the body.

Touchpad
Depending on the country and special equipment, the controller is also available with integrated touchpad. In this case, the rotary knob has a touch-sensitive surface (touchpad).
The touchpad is an input device for optimized character input and simplified map operation.
A control unit software evaluates the coordinates that were entered using the touchpad. This control unit software is located in the touchbox (TBX) and it is not part of the controller.
Character and gesture recognition occur in the touchbox (TBX). Characters may be letters and numbers. Gestures are scrolling and zooming, for example.
The recognised characters and gestures are transferred to the headunit or rear seat entertainment via CAN bus.
The touchpad has the following technical properties:
- Single-touch and double-touch (recognition of 2 fingers)
- High resolution (up to 100 dpi)
- Quick data transfer rate during scanning (15 ms for an entire scan)







Signal shape for character recognition: Controller (CON) > K-CAN2 > Touchbox (TBX) > K-CAN2 > Headunit Basic (HU-H)

System functions

Functional networking
A complex system network with distributed functions residing in additional control units is needed for implementation. The following graphics show the functional networking on the example of rear seat entertainment.







Notes for Service department

Diagnosis instructions
The audio operation in the rear compartment requires teaching if the Car Access System (CAS) has been renewed or a new audio operation unit is being used. A service function is available in the diagnosis accordingly.
We can assume no liability for printing errors or inaccuracies in this document and reserve the right to introduce technical modifications at any time.
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