Power Sensor (Option) - Philips 227E3LHSU/01 Service Manual

Meridian 3
98

3.16 Power Sensor (option)

Functional requirements for the front detection
For the presence sensor functionality, the following requirements are defined.
Two IRs used for user present detections, one IR is for transmission signals, the other one is for receiving
reflection IR signals.
User must be detected in the following range:
40 up to 100 cm (+ 20cm)
Detection angle:
+/-35 degree (for IR LED)
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
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 center +/- 5cm
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
Power Sensor
Power Saving
60sec 60sec ~ 180sec
Lower down backlight
No ACTION
brightness
0 50%
180sec ~
Backlight & LCD panel
shutdown
80%