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1. (WO2017035298) COLLIMATING STEP-WEDGE LIGHT GUIDE

Pub. No.:    WO/2017/035298    International Application No.:    PCT/US2016/048537
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Aug 26 01:59:59 CEST 2016
IPC: G02B 26/08
F21V 8/00
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: EPSTEIN, Kenneth A.
WHEATLEY, John A.
Title: COLLIMATING STEP-WEDGE LIGHT GUIDE
Abstract:
A light guide includes a light input surface, a first major surface orthogonal to the light input surface and a second major surface opposing the first major surface and forming a converging wedge with the first major surface. The second surface includes a plurality of doublet light extraction features closely-packed or separated by a land feature. Each doublet feature includes a first prism feature having a first shape and a second prism feature having a second shape and the second shape is different than the first shape.