Long curved wedges in an optical film
First Claim
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1. A light redirecting film comprising a plurality of individual polymeric optical elements on or in at least one surface of a polymeric film or substrate, wherein said optical elements have at least two surfaces, at least one of said surfaces being curved, and said optical elements having a length in the range of 800 to 2000 micrometers.
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Abstract
The invention relates to a light redirecting polymeric film comprising a plurality of polymeric individual optical elements wherein the elements comprise curved wedge shaped features in the plane of the film, having a length in the range of 800 to 4000 micrometers.
99 Citations
38 Claims
- 1. A light redirecting film comprising a plurality of individual polymeric optical elements on or in at least one surface of a polymeric film or substrate, wherein said optical elements have at least two surfaces, at least one of said surfaces being curved, and said optical elements having a length in the range of 800 to 2000 micrometers.
- 22. A display system comprising a backlight assembly having at least one light source and at least one light redirecting film for redirecting light received from said backlight assembly, said light redirecting film comprising a polymeric film or substrate having a plurality of individual polymeric optical elements on or in at least one surface of said polymeric film or substrate, wherein said optical elements have at least two surfaces, at least one of said surfaces being curved, and said optical elements have a length in the range of 800 to 2000 micrometers and a width of between 15 and 60 micrometers.
- 36. A light redirecting film comprising a plurality of individual polymeric optical elements on or in at least one surface of a polymeric film or substrate, wherein said optical elements have at least two surfaces, at least one of said surfaces being curved, and said optical elements having a length in the range of 800 to 2000 micrometers, wherein said optical elements and said polymeric film or substrate bearing the optical elements are a unitary structure having no transition point between the optical elements and any remaining portion of the polymeric film or substrate.
Specification