Planar lighting device
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United States of America Patent
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Jun 3, 2014
Grant Date -
Feb 28, 2013
app pub date -
Aug 24, 2012
filing date -
Aug 25, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A light guide plate has a light guide plate body and at one side thereof a curvedly descending portion formed by curving front and rear surfaces of the light guide plate, with the surface to surface distance kept uniform, to a coaxial arcuate configuration so as to extend towards a direction of a rear surface of the light guide plate body. Spot light sources disposed in face to face relation with a free end face of the curvedly descending portion are arranged to be displaced towards the front surface of the light guide plate from a mid-center plane between the front and rear surfaces of the curvedly descending portion.
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