Display Subsystem - GE HEALTHCARE CARESCAPE Monitor B650 Technical Manual

CARESCAPE Monitor B650
Support for interfaces:
• A USB host controller (root hub) provides a high speed USB interface for the external USB
ports in the interface boards and for the internal system components (user interface
board, tone generator and for the USB Disk On Module).
• The main processor provides one link layer interface for the external RJ-45 Ethernet ports
and ePort DB9 PDM interface in the interface board.
• The CPU board provides a physical layer Ethernet interface for the 10-pin ePort connector
in the PDM docking station.

9.1.3 Display subsystem

The patient monitor has an integrated 15" active matrix color TFT LCD panel with an LED
backlight unit. It provides wide viewing angle and supports XGA (1024 * 768 pixels) resolution.
The video controller is integrated into the CPU board. The CPU board provides LVDS output and
+3.3 V supply voltage to the LCD panel via the display cable.
9.1.4 User interface subsystem
User interface board
The user interface board has a micro controller that manages the following main functions:
• It reads the user input from the keypad matrix and Trim Knob encoder and passes the
information to the CPU board.
• A separate touchscreen controller digitizes the user input received from the touchscreen
sensor and passes the coordinate information directly to the CPU board.
• It turns the alarm light LEDs on and off according to the information received from the
CPU board.
• It digitizes the information of the ambient light sensor and passes it to the CPU board.
• It adjusts the brightness of the alarm light and keypad backlight according to the
information received from the CPU board.
• It provides a back-up speaker function using a buzzer in case of a main speaker failure.
• It provides a visual and audible power failure alarm control in case of sudden system
power loss.
• It passes the drive signals coming from DC/DC board via CPU board to the power
indicator LEDs in the keypad.
The user interface cable connects the user interface board to the CPU board:
• The data communication method used is USB communication.
• It passes the +3.3 V and +5 V supply voltages and power indicator LEDs' status to the user
interface board from the DC/DC board.
• The on/standby button press is passed to the DC/DC board via the CPU board.
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