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US 9,039,245 B2Granted
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.
Claims18
A light directing composite film comprising;
- a planar top major surface comprising a light transparent substrate having a pressure sensitive adhesive layer disposed thereon;
- 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, and wherein the light reflection regions and the light transmission regions are formed at substantially the same time;
- 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.