公开(公告)号：US20200057343A1

公开(公告)日：2020-02-20

申请号：US16346647

申请日：2017-11-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kenneth A. EPSTEIN ,  Nicholas A. JOHNSON ,  Michael E. LAUTERS ,  Shannon L. SIEFKEN ,  Gary T. BOYD

IPC: G02F1/1335 ,  G02B5/04 ,  F21V5/08 ,  G02F1/13

Abstract: The disclosure describes asymmetric turning films (ATFs) that may be used in conjunction with multiple light sources in a liquid crystal display assembly to provide multiple different characteristic output distributions of light. In some examples, the ATFs include a structured surface defining a plurality of microstructures having two or more faces with each face configured to reflect light in different directions. The microstructure may define a microstructure axis and an angle gradient characterizing the rotation of the microstructure axis across the structured surface of the ATF.