Light guide plate, surface-emitting apparatus, liquid crystal display apparatus, and method of producing a light guide plate
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United States of America Patent
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Jun 10, 2014
Grant Date -
Aug 26, 2010
app pub date -
Feb 6, 2009
filing date -
Feb 7, 2008
priority date (Note) -
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Abstract
A light guide plate includes a light-emitting surface, a light-reflecting surface opposed to the light-emitting surface, and a light-incident surface including a protrusion formed continuously along an edge portion of the light-emitting surface. Accordingly, light that has entered the protrusion is transmitted through the protrusion and totally reflected on an inner surface of the light-emitting surface to thus propagate inside the light guide plate. As described above, since incident light components emitted toward an upper portion of the light-incident surface can be effectively blocked by the protrusion, luminance distribution characteristics as well as a light use efficiency can be improved. The light guide plate is produced by a punching press process.
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