Samsung UN40D6500 E-Manual page 128

● When the TV is initially powered on, may take some time until the 3D display
is optimized.
● The 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.
● Be sure to stay within the viewing angle and optimum TV viewing distance
when watching 3D pictures.
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Otherwise, you may not be able to enjoy proper 3D effects.
● The ideal viewing distance should be three times or more the height of the
screen. We recommend sitting with viewer's eyes on a level with the screen.
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