Product Principle 4-17
Control board
Key
board
Parameter
board
LCD Screen
Back-end motherboard
+12V
+12V
Control
signal
Key
signal
+5V DVI I2C
LVDS 3.3V 3.3V
Parameter
communication &
brightness
feedback
Display
Status
indicator
Fig 4-21 Schematic diagram of the display
The display unit mainly consists of control board, LCD screen, parameter board, key board, etc.
Function:
The control board, as the main part of the monitor, transfers DVI input into LVDS signal then
output to the LCD screen, monitors other board or signal; meanwhile, it can communicate with
the main system through I2C port. So it is convenient for the main system gathering/controlling
information from the monitor.
Parameter board saves data of color temperature and gamma correction, and it is used with
LCD screen, so that the corresponding display effect shall be consistent. Meanwhile, it
monitors the backlight brightness of LCD. The control board will adjust the LCD backlight
brightness according to the current, transferring efficient of backlight or temperature changed,
the brightness of LCD screen can keep stable.
User can adjust part of the monitor parameters through key and menu.
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