Backlight module
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United States of America Patent
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Feb 26, 2008
Grant Date -
Aug 23, 2007
app pub date -
Sep 15, 2006
filing date -
Feb 23, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A backlight module (20) includes a plurality of light sources (24) and an optical sheet (21). The optical sheet includes a light incident surface (211), a light emitting surface (212), and a plurality of inverted rectangular pyramid depressions (213). The light sources are positioned adjacent to the light incident surface. The light incident surface and the light emitting surface are at opposite sides of the optical sheet. The inverted rectangular pyramid depressions are defined on the light emitting surface and aligned regularly in a matrix manner.
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