Backlighting device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 22, 2005
Grant Date -
Feb 5, 2004
app pub date -
Mar 19, 2003
filing date -
Mar 19, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The proposed device uses a plastic of any color with a cavity introduced in it and preferably with a polished inner surface, instead of a reflector or a light guide, to utilize increased reflection with grazing incidence (large angle of incidence versus the normal to the surface). The light from a light source is transported to the symbol by reflection in this cavity and on the inner surface. The light source is preferably of a flat structure.
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