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US 2013/0033875 A1Published application
Energy efficient sign
Assignee3M Innovative Properties Company
InventorsMichael A. Meis, David G. Freier, Patrick R. Fleming
Life of this patent
Estimating the term…
Abstract
A light directing composite film includes a planar top major surface, a planar bottom major surface, a plurality of lenticular lens elements disposed between the top major surface and the bottom major surface, and a plurality of light reflection regions and light transmission regions disposed between the plurality of lenticular lens and the planar bottom major surface.
Claims21
A light directing composite film comprising;
- a planar top major surface;
- a planar bottom major surface;
- a plurality of lenticular lens elements disposed between the top major surface and the bottom major surface;
- and
- a plurality of light reflection regions and light transmission regions disposed between the plurality of lenticular lens and the planar bottom major surface.
2 more elements
A method comprising:
- forming a plurality of lenticular lens elements on a substrate first major surface;
- forming a plurality of light reflection regions and light transmission regions on a second major surface of the substrate, the second major surface opposing the first major surface;
- disposing a light transparent substrate on the plurality of lenticular lens elements, forming an air gap between at least a portion of the lenticular lens elements and the light transparent substrate.
Dependencies are inferred from the claim text.