Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kenichi Iwamoto0
Date of Patent
March 15, 2011
0Patent Application Number
119174510
Date Filed
May 2, 2006
0Patent Primary Examiner
Patent abstract
A notch is formed in a side of an optical sheet. As seen in plan view, the notch is shaped such that the maximum width of the notch as measured in the direction parallel to the line connecting both ends of a mouth portion of the notch is greater than the width of the mouth portion along the side of the optical sheet. Here, it is preferable that the notch be polygonal or have a curved shape as seen in plan view.
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