Samsung PN51E6500EFXZA - Manual (Page 280)

not supported.
ΠWhen the TV is initially powered on,
it may take some time until the 3D
display is optimized.
ΠThe 3D Active Glasses may not work
properly if there is any other 3D
product or electronic devices turned
on near the glasses or TV. If there
is a problem, keep other electronic
devices as far away as possible from
the 3D Active Glasses.