Samsung PN51E6500EFXZA - Manual (Page 80)

Component.
N Some external devices may not
support this function.
●
Motion Lighting
When on, the TV automatically
adjusts the brightness of the screen in
response to the brightness of the room.
In bright light, the screen brightens. In
dim light, the screen dims.
N Only available in Standard mode.
N This feature is not supported in 3D