Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shao-Han Chang0
Date of Patent
February 26, 2008
0Patent Application Number
115219090
Date Filed
September 15, 2006
0Patent Primary Examiner
Patent 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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