Summary
The Ambient Light Detection function (also called ECO Sensor on some older models) measures the light in the room and changes the screen brightness automatically to reduce power consumption.
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This feature can be turned on or off by going into the Screen Menu > System > Eco Solution > Eco Sensor > select On or Off.
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According to
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Summary
If your Samsung TV dims or brightens automatically, this isn’t a problem. It is a feature that Samsung has added intentionally.
The Ambient Light Detection function (also called ECO Sensor on some older models) measures the light in the room and changes the screen brightness automatically to reduce power consumption.
Why does my Samsung TV screen dim or brighten by itself?
samsung.com
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nextstepaudioenhancement.com
Find out how to stop your Samsung Galaxy screen from dimming while using the internet ... If your screen automatically dims or brightens, this is likely due to ...
Stop Samsung Galaxy Screen Dimming | RCUK
rcuk.com
