Patent · US Active

Light directing film

US7950838B2 · kind B2 · utility

5Cited by

7References

7Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Todd M. Johnson · Moorpark, US
Tetsuya Toma · Tokyo, JP
Patrick H. Marushin · Windom, US

Key dates

Filing date	May 31, 2006
Grant date	May 31, 2011
Priority date	—
Expiry date	Aug 28, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133504
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A light directing film and an optical system incorporating same are disclosed. The light directing film includes a first major surface and a microstructured second major surface. The microstructured second major surface has at least two periodic microstructured patterns. The first periodic pattern is arranged along a first direction. The second periodic pattern is arranged along a second direction different from the first direction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.