Patent ID: 9739436
Date: 2017-08-22
CPC Classifications: E06B,F21S,G02B

Claim:
1. A light management film construction comprising: a first optical film having a first major surface and a second major surface opposite the first major surface wherein the first major surface comprises a microstructured surface comprising asymmetrical structures wherein the asymmetrical structures comprise an ordered arrangement of a plurality of multi-sided refractive prisms, wherein a cross section of each of the multi-sided refractive prisms comprises 3 or greater sides such that at least one side of each of the multi-sided refractive prisms is a curved surface; and a second optical film having a first major surface and a second major surface opposite the first major surface, the second major surface disposed adjacent to and making contact with and bonded to substantially all of the structures of the first major structured surface of the first optical film, and wherein the first major surface of the first optical film and second major surface of the second optical film defines an enclosed volume partially occupied by the structures on the first major surface of the first optical film such that the structures occupy 20-80% of the total volume defined.