Honeywell Thor VM1 User Manual page 158

Screen Blanking
Screen blanking allows the Thor VM1 display to automatically be turned off whenever
the vehicle is in motion.
Use the Screen on delay to specify the period of time in ms (milliseconds) between
when the vehicle stops and the Thor VM1 screen turns on. For example, use the delay if
the switch end of the cable is attached to the vehicle's accelerator pedal. Release of the
accelerator may mean the truck is coasting to a stop rather than stationary. Configure
the delay to allow time for the vehicle to coast to a stop. The default value is 1000 ms.
Specify the COM Port to which the screen blanking cable is attached. If a COM port is in
use by another application, that COM port is grayed out and cannot be selected for
screen blanking.
Do not enable Screen Blanking until the cable is properly connected to the
specified COM port.
To disable screen blanking, uncheck the Enable screen blanking checkbox.
See
Refer to the wiring instructions, including appropriate cautions and warnings, in the
Connect Power
Automatic Brightness Control
When the Thor VM1 is equipped with an outdoor display, automatic brightness control
can be enabled. When enabled, display brightness is based on ambient light detected
by the ambient light sensor, located near the top right of the display. The default is dis-
abled. To enable, check the Enable automatic brightness control checkbox and specify
the thresholds for display backlight transition.
When enabled, the thresholds can be entered for display brightness transitions.
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Current Level
Current levels of LCD brightness and ambient light are displayed as a percentage.
Ambient light level is detected by the light sensor, located near the top right of the dis-
play.
148
Screen Blanking for hardware requirements.
section.
When a low level of ambient light is detected, the display backlight is set to low level.
When the ambient light exceeds the threshold specified in Low to medium light level
(%), the display backlight is automatically increased to a medium level.
When the ambient light exceeds the threshold specified in Medium to high light level
(%), the display backlight is automatically increased to a high level.
Likewise if the Thor VM1 is returned to a lower ambient light area, the display
backlight automatically transitions to the appropriate lower display backlight level.
Thor VM1 with Microsoft Windows Embedded Standard 2009 User Guide