LG LG-V909DW - 3.18 Illumination Sensor

3. TECHNICAL BRIEF
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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3.18 Illumination Sensor
Illumination Sensor adjusts LCD backlight current by detecting the surrounding brightness.
If user checks the automatic brightness menu, LCD backlight current adjusting is to be enable automatically.
U1600 : BH1721 IC
Figure. Illumination Sensor Schematic
Figure. Illumination Sensor Block Diagram
AMBIENT_3V3
1u
C1602
AMBIENT_3V3
U1600
BH1721FVC
43
2
51
VCC
SCL
GND
SDA DVI
2061R
K001
AMBIENT_RST
SENSOR_I2C_SDA
SENSOR_I2C_SCL