LED LIGHTING DEVICE WITH LIGHT GUIDE PLATE
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United States of America Patent
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N/A
Issued Date -
Sep 27, 2012
app pub date -
Mar 21, 2012
filing date -
Mar 21, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A light guide plate includes a lateral side through which light enters and a front side through which light exits. A phosphor is coated on the lateral side. A light source includes a plurality of light emitting diodes (LEDs) having wavelengths of 230-520 nanometers (nm). The LEDs are mounted proximate to the lateral side and corresponding to, but separated from, the phosphor. A reflector includes a reflective surface and is mounted on a back side of the light guide plate with the reflective surface facing the light guide plate. A frame fixes the light guide plate, the light source, and the reflector. Colors of the phosphor and the light source are complementary. The phosphor absorbs light from the light source to transition into an excited state. The light guide plate outputs light from the light source and the phosphor through the front side.
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