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98 Meridian 3
3.16 Power Sensor (option)
Functional requirements for the front detection
For the presence sensor functionality, the following requirements are defined.
y
Two IRs 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:
40 up to 100 cm (+ 20cm)
y
Detection
angle:
+/-35 degree (for IR LED)
y
Sensor key control
Adjust detection distances (0~4 scales), default is 3 tolerances: (+/-10 cm)
0: OFF
1: 90 cm
2: 100 cm
3: 110 cm
4: >130 cm
y
Sensor distance measure:
1. Cotton material color: black
2. Monitor center straight distance (90 deg)
3. Body with: about 40 cm
4. Body horizontal move: Monitor /- 5cm
y
Anti-interference between two monitors
Monitors must have anti-interference methods (coding .ect) 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%
