ANTIREFLECTION FILM
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United States of America Patent
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Issued Date -
Apr 30, 2015
app pub date -
Mar 12, 2013
filing date -
Mar 15, 2012
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Abstract
On a surface of a film base material (22), an antireflection structure configured by nano-sized optical projections (23) to suppress reflection of light and protective pillars (24) to prevent the optical projections (23) from being flattened out are arranged. The protective pillar (24) has a truncated cone shape. When a diameter of the protective pillar (24) at a proximal end thereof, a height of the protective pillar (24), and an angle between a side surface of the protective pillar (24) and a central axis of the protective pillar (24) on a section passing through the central axis of the protective pillar (24) are given by D, H, and θ, respectively, these values satisfy a relationship: D>2H×tan(2θ).
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