Mindray BeneVision N22 - Display Signal Flow

2-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
Note: If the display is connected to the AC power supply, power failure of the main unit will not cause display power
failure.. Therefore, to completely disconnect the power supply from the system, disconnect the AC power cord of the
main unit, and hold the power switch for 15 seconds. Disconnect the AC power cord of the display..
2.4.2 Display Signal Flow
N22/N19 System
Front housing assembly (primary display)
Front Interface board
Main unit
DP
System
main
control
MCU and
firmware
of the
front
interface
board
DP
Reciver
USB
I2
C
USB
HUB
USB
Touchscreen
control board
Encoder
UART
Audio
circuit
Speaker
Alarm light
LOGO LED
Screen
backlight
Reserved
USB
External
Flash
Front housing assembly (
secondary display)
DP
USB
Ambient light
detection
The display function is implemented through the output of the main control, and it is realized through sending the
signals to the front housing interface board through the DP interface. The front housing interface board converts the DP
signals to LVDS signals through the DP conversion chip to drive the display.