Backlight for liquid crystal display device
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United States of America Patent
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Jun 21, 2011
Grant Date -
Feb 19, 2009
app pub date -
Jan 31, 2007
filing date -
Feb 1, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A backlight for a liquid crystal display device includes a plurality of point light sources 1 arranged linearly, a light guide plate 3 having a light incident surface 3a, a reflection surface 3b and a light emitting surface 3c for emitting the light reflected by the reflection surface 3b. A light scattering pattern 31 is formed on the reflection surface 3b. A light control pattern 32 is formed on the reflection surface 3b at almost entire portions except for the light scattering pattern 31 is formed for reflecting the light introduced and for outputting from the light emitting surface 3c. A pattern less area is formed on the reflection surface 3b at a boundary portion between the light scattering pattern 31 and the light control pattern 32.
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