LIGHT GUIDE PLATE HAVING A ONE-DIMENSIONAL MICRO-PATTERN IN ITS MIXING ZONE
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United States of America Patent
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Issued Date -
Dec 12, 2013
app pub date -
Jun 12, 2012
filing date -
Jun 12, 2012
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Abstract
The present invention provides a light guide plate having reduced hot spots comprising an input surface for receiving light from a plurality of discrete light sources, an output surface for emitting light, a bottom surface opposing to the output surface, and an end surface opposing to the input surface. The invention further provides a set of lenses distributed in the core zone and a set of micro-lenses distributed in the mixing zone, wherein the density of the set of micro-lenses stays the same in the X-axis, and the selected size and the density of the micro-lenses redirect the light from the discrete light sources toward the Y-axis and a ratio L1/L0 is between 0.9 and 1.1 for any Y≧Y1.
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