SCREEN, HEAD RESTRAINT
The multimedia head restraint consists of five main components
- Screen
- Circuit board
- Rear piece
- Border
- Head restraint pad
The rear piece is fastened in an opening on the rear of the head restraint pad. The circuit board is held in place in the rear piece with three screws. The screen is housed in the rear piece in front of the circuit board and is connected with a flexible foil cable and an AC lead. The border holds all electronic components in place in the rear piece in the head restraint pad. The lower edge of the border contains a window so that the infrared receiver on the circuit board can receive infrared signals from the remote control. The infrared receiver is separately connected to the rear seat entertainment module (RSE) and is activated when the rear seat entertainment module (RSE) is on.
The 7-inch screen in the head restraint has an aspect ratio of 16:9. The screen is positioned to provide the optimal viewing angle. The screen has a 120 degree horizontal viewing angle.
The integrated infrared receiver is activated when Rear seat entertainment module (RSE) receives voltage supply. The screen is not activated until it receives a high signal on the wake-up cable from Rear seat entertainment module (RSE)/DVD-player.
This signal is sent when the system is switched on with the POWER button on the remote control or with the POWER button on the control module.
The circuit board contains an image generator, infrared receiver, infrared transmitter and the unit that controls all screen settings
- colour
- contrast
- brightness
- aspect ratio.
Damping control has a damping relationship of 30:1 to improve the image and reduce bright light from light day conditions down to complete darkness. Brightness can be adjusted so that the screen's image easily can be seen in daylight as well. Voltage protection and power supply of the screens background lighting also take place via the circuit board. The control module contains logic for interpreting commands for setting video performance, input selection, and intensity of background lighting. Control commands are sent from Rear seat entertainment module (RSE) via a private CAN-net.
Each screen has an integrated infrared transmitter to send sound signals to the wireless headphones.
The screens are supplied power and grounded via the rear seat entertainment module (RSE).
To check whether a screen has power and ground, you can switch on the ignition and then switch on the system with the remote control. The screen will then come on.
Note. If voltage supply and ground to the screen work but the screen has no contact with Rear seat entertainment module (RSE)/DVD-player, the screen will still be activated in LOCAL-mode. However, this is no guarantee that the whole system works. For more information, see : TROUBLESHOOTING INFORMATION If the screen works in LOCAL-mode this indicates that voltage supply and ground to the screen's circuit board are okay.