Transparent surface formed complex polymer lenses
AssigneeEastman Kodak Company
InventorsRobert P. Bourdelais, Cheryl J. Kaminsky, Jehuda Greener
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Abstract
Disclosed is a transparent polymeric film having a top and bottom surface comprising a plurality of complex lenses on at least one surface thereof and containing as its primary ingredient a polymer sufficient to impart to the film a light transmission of at least 92% based on a film thickness of 125 micrometers.
Claims39
A transparent polymeric film having a top and bottom surface comprising a plurality of complex lenses on at least one surface thereof and containing as its primary ingredient a polymer sufficient to impart to the film a light transmission of at least 92%, based on a film thickness of 125 micrometers.
The transparent polymeric film of claim 2 wherein said polymeric film has a light transmission of at least 94% based on a film thickness of 125 micrometers.
A back lighted device comprising a light source and a transparent polymeric film comprising a plurality of complex lenses on a surface thereof and having a diffuse light transmission of at least 85%.
A liquid crystal device comprising a light source and a transparent polymeric film comprising a plurality of complex lenses on a surface thereof and having a diffuse light transmission of at least 85% wherein the transparent polymeric film is located between the light source and a polarizing film.
A component for a liquid crystal display device comprising a light source and a light diffuser comprising a transparent polymeric film containing a plurality of complex lenses on a surface thereof and having a diffuse light transmission of at least 85%.
A method for forming a plurality of polymeric complex lenses in a desired pattern on a transparent base comprising the step of coating a melted layer of a polymeric material onto the base and cooling the material while subjecting the layer to contact with a form having a pattern corresponding to the negative of the desired lens pattern.
A method for forming a plurality of polymeric complex lenses in a desired pattern on a transparent base comprising casting the polymeric material onto the support on a chill roll and cooling the material while subjecting the layer to contact with a form having a pattern corresponding to the negative of the desired pattern.
Dependencies are inferred from the claim text.