LED array systems
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United States of America Patent
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Aug 16, 2011
Grant Date -
Dec 1, 2005
app pub date -
Jun 1, 2004
filing date -
Jun 1, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A light emitting diode (LED) array comprises an array of LEDs mounted to a substrate. The LEDs emit light in a direction generally perpendicular to the substrate. An optical sheet is disposed over the LEDs. At least a portion of light entering one side of the optical sheet from the LEDs is guided within the optical sheet in a direction generally parallel to the substrate. Light extraction features direct light from the optical sheet in a generally forward direction. Such an array is useful for several applications, including space lighting, direct information display and backlighting of liquid crystal displays. The light spreading effect of the optical sheet reduces the amount of black space between LED pixels.
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