Samsung UN55ES8000G E-Manual page 196

is set to On, you can manually adjust
the minimum screen brightness.
N
If the
display brightness may change
(become slightly darker or brighter)
depending on the light intensity
in your room. You can control the
screen's minimum brightness with
the
function.
●
No Signal Power Off
Eco Sensor
Min. Backlight
is set to On, the
/ Min Cell Light