Samsung pn43d450a2d E-Manual page 120

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3D Active Glasses from Samsung's previous product (IR type) or other
manufacturers not be supported.
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When the TV is initially powered on, may take some time until the 3D
display is optimized.
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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.
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