Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Wataru Tokuhara0
Daijiro Kodama0
Masahiro Goto0
Date of Patent
December 8, 2009
0Patent Application Number
115228440
Date Filed
September 18, 2006
0Patent Primary Examiner
Patent abstract
A light controlling sheet is provided in a surface light source device including a light source portion. The light controlling sheet includes an outgoing light side lens portion having multiple unit lenses arranged to project toward the outgoing light side, and transparent portions and reflecting portions provided on the incident light side. The transparent portions and the reflecting portions are arranged alternately, and the transparent portions comprise 40% to 60% of the total area of the light controlling sheet when viewed form a direction orthogonal to the sheet surface on the incident light side.
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