Sony KDL-26M3000, KDL-26ML130, KDL-32M3000, KDL-32ML130, KDL-37M3000 Operating Instructions Manual page 37

Option
Light Sensor
Description
Select On to enable the automatic picture (screen) brightness control. The light sensor
measures the room brightness which allows the TV to automatically adjust the backlight
brightness based on the picture settings and the ambient room light conditions.
• Be sure not to put anything around the sensor, as its function may be affected.
• In low light the range of the backlight control is reduced when Light Sensor is set to
On.
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