Teledyne T360 Uživatelský manuál Strana 221

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Teledyne API Model T360/T360M Operation Manual Principles of Operation
219
7.5. FRONT PANEL TOUCHSCREEN/DISPLAY INTERFACE
Users can input data and receive information directly through the front panel
touchscreen display. The LCD display is controlled directly by the CPU board.
The touchscreen is interfaced to the CPU by means of a touchscreen controller
that connects to the CPU via the internal USB bus and emulates a computer
mouse.
Figure 7-19: Front Panel and Display Interface Block Diagram
7.5.1. LVDS Transmitter Board
The LVDS (low voltage differential signaling) transmitter board converts the
parallel display bus to a serialized, low voltage, differential signal bus in order to
transmit the video signal to the LCD interface PCA.
7.5.2. Front Panel Touchscreen/Display Interface PCA
The front panel touchscreen/display interface PCA controls the various functions
of the display and touchscreen. For driving the display it provides connection
between the CPU video controller and the LCD display module. This PCA also
contains:
power supply circuitry for the LCD display module
a USB hub that is used for communications with the touchscreen controller
and the two front panel USB device ports
the circuitry for powering the display backlight
07272B DCN6552
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