Illumination – Edge lighted panel – Light modifier for edge lit light source
Reexamination Certificate
2007-07-30
2011-11-08
May, Robert (Department: 2885)
Illumination
Edge lighted panel
Light modifier for edge lit light source
C362S615000, C362S628000, C362S623000, C362S608000, C362S621000
Reexamination Certificate
active
08052315
ABSTRACT:
It is an object to provide a planar illumination device that is thin and light weight, and can emit uniform illumination light with little brightness unevenness and can be enlarged in size. It is to provide a planar illumination device comprising: a first light source and a second light source which are arranged at predetermined intervals; and a light guide plate which is arranged between the first light source and the second light source and has: a light exit surface; a first light incident surface which is opposed to the first light source and includes a side of the light exit surface; a second light incident surface which is opposed to the second light source and includes an opposite side to the side; and a rear surface which is formed to be opposed to the light exit surface, wherein a cross section on a plane perpendicular to the side, of the rear surface of the light guide plate has a curved line in which a distance from the light exit surface increases with a shift from the first light incident surface and the second light incident surface to a center, an inclined angle relative to the light exit surface reduces with a shift from the first light incident surface or the second light incident surface to the center, and the inclined angle relative to the light exit surface is zero degrees at the center.
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International Preliminary Report on Patentability and Written Opinion, mailed Feb. 3, 2009, issued in corresponding International Application No. PCT/JP2007/064880, 10 pages.
FUJIFILM Corporation
May Robert
Sughrue & Mion, PLLC
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