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US Patent 7637639 LED emitter with radial prismatic light diverter

Patent 7637639 was granted and assigned to 3M on December, 2009 by the United States Patent and Trademark Office.

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Patent abstract

An optical assembly includes a light emitting diode (LED) and a structured surface. The structured surface has a plurality of prismatic structures arranged radially with respect to a reference point, and is disposed relative to the LED such that the reference point is substantially aligned with a light emission axis of the LED. Arrays of such assemblies and backlights and displays including same are also disclosed.

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