Surface light source
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United States of America Patent
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-
Nov 30, 2004
Grant Date -
Jul 31, 2003
app pub date -
Jan 28, 2003
filing date -
Jan 28, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surface light source includes concave lens portions provided opposite to light-emitting diodes. The concave lens portions refract or align point light from the diodes. The refracted light is transformed into linear light by a light guide pipe. The linear light is further transformed into surface light by a light guide plate. Due to refraction or alignment of the concave lens portions, the point light from the diodes is efficiently transformed into the linear light. Thus, the surface light source is capable of improving the brightness of surface light transformed by the light guide plate.
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Cited Art Landscape
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