Samsung PL64E8000GFXZP - Manual (Page 190)

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Eco Sensor
To enhance power savings, the picture
settings will automatically adapt to the
light in the room.
N If you adjust Backlight
for LED TV
/
Cell Light
for PDP TV
in the Picture
menu, the Eco Sensor will be set to
Off automatically.
Min. Backlight
for LED TV
/ Min Cell
Light
for PDP TV
: When the Eco Sensor
is set to On , you can manually adjust