Why does my Samsung TV screen dim or brighten by itself?

Last Update date : Dec 01. 2022

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. The screen will be brighter in a brightly lit room and darker in a dark room.

Can I turn off this feature?

The method for turning this function on or off will differ depending on your model. You need to work out whether your model was made before 2016 or after 2017.  Please refer to your user manual for detailed information. 

2016 models or older: System > Eco Solution > Eco Sensor > select On or Off.

2017 models or newer: Settings > General > Ambient Light Detection > use the slider to turn it on or off.

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