Prism sheet, back light unit using the same and liquid crystal display device having the back light unit
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United States of America Patent
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Mar 15, 2011
Grant Date -
Jan 4, 2007
app pub date -
Dec 27, 2005
filing date -
Jun 29, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A prism sheet, a back light unit using the same and liquid crystal display device having the back light unit are disclosed, for improvement of light concentration, frontal luminance and viewing angle, in which the prism sheet includes a light-condensing film. The light condensing film has a plurality of prism peaks, each having a triangular cross section inclined surface which is inclined from a top surface of the light-condensing film at an angle of about 20° to about 40°.
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