Optical sheet, backlight assembly and display device having the same
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United States of America Patent
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Jun 30, 2009
Grant Date -
Sep 27, 2007
app pub date -
Mar 21, 2007
filing date -
Mar 21, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical sheet includes a base film and a light-concentrating member. The light-concentrating member includes light-concentrating protrusions and is disposed on the base film. Each of the light-concentrating protrusions includes first to fourth surfaces. The first and second surfaces are extended from the upper surface along an exterior surface of a first and second cylinder in a clockwise and a counterclockwise direction, respectively. The first and second cylinders have first and second axes that are substantially parallel to each other. The third and fourth surfaces are extended from the upper surface along an exterior surface of a third cylinder in clockwise and counterclockwise directions, respectively. The third axis is substantially perpendicular to the first central axis.
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