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Meridian 3
3.19 Power Sensor
Functional Requirement for the front detection
For the presence sensor functionality, the following requirements are defined.
y
Two IRs be used for user present detections, one IR is for transmission signals, the other one is for
receiving reflection IR signals.
y
User must be detected in the following range: 0 up to 100cm (+20 cm)
y
Detection angle: +/- 30 degree
y
Sensor key control: adjust detection distance (0~4 scales), default is 3
0: off, 1: 55 cm, 2: 70 cm, 3: 85 cm, 4: 100cm
y
Anti-interference between two monitors, monitors must have anti-interference methods (coding…etc) to
prevent monitors to talk to each other.
Power Sensor Functional Behavior
Time Period
60sec
60sec ~ 180sec
180sec ~
Power Sensor
No ACTION
Lower down backlight
brightness
Backlight & LCD panel
shutdown
Power Saving
0
50%
80%
The following setup will be supported:
Monitors standing back to back
The monitors may influence each other. So Monitor 1 may produce unexpected brightness-switches in
monitor 2 (and vice versa). Furthermore, user 1 could perhaps (via monitor 1) influence the power sensor
readout on monitor 2
