Illumination device and bulletin board device
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United States of America Patent
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-
Jun 19, 2001
Issued Date -
N/A
app pub date -
Jul 6, 1998
filing date -
Jul 7, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A curved surface is provided under a range of conditions whereby light rays from a light source that are input from an end face of a light guide plate are guided within light guide plate. When light rays reach projecting shapes that are provided on plate face of light guide plate, they are output from light guide plate and illuminate object to be illuminated. With this construction, light guide plate has the function of transmitting with scarcely any dispersion rays of light that are directed on to object to be illuminated and that are reflected by object to be illuminated.
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Cited Art Landscape
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