IP Library › Granted Patent US 9,229,239
Granted Patent B2
US 9,229,239 · App. 14/186,363 · Granted Jan 5, 2016

Light redirecting film and display system incorporating same

Inventors: Joseph T. Aronson (Menomonie, WI); Slah Jendoubi (Fridley, MN); Mitchell A. F. Johnson (Maplewood, MN); Scott R. Kaytor (Woodbury, MN); Tri D. Pham (Woodbury, MN); Robert A. Yapel (Oakdale, MN); Joseph A. Zigal (Lago Vista, TX); Steven J. McMan (Stillwater, MN); Steven D. Solomonson (Shoreview, MN); Steven Hin-Chung Kong (Woodbury, MN); Fei Lu (Woodbury, MN); Gary T. Boyd (Woodbury, MN)
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
G02B27/126G02B5/02G02B5/045G02B6/0053B32B2307/40G02F2001/133607
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Quick Facts
Patent No.
US 9,229,239
App. No.
14/186,363
Granted
Jan 5, 2016
Kind
B2
Abstract

Light redirecting film is disclosed. The light redirecting film includes a first major surface that includes a plurality of first microstructures that extend along a first direction. The light redirecting film also includes a second major surface that is opposite to the first major surface and includes a plurality of second microstructures. The second major surface has an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%. The light redirecting film has an average effective transmission that is not less than about 1.75.

Claims (4)

1. An optical film comprising a structured major surface comprising geometrical symmetry and asymmetric slope distribution, wherein no more than about 7% of the structured major surface has a slope magnitude greater than about 3.5 degrees or no more than about 4% of the structured major surface has a slope magnitude greater than about 5 degrees.

2. An optical film comprising a structured major surface comprising geometrical symmetry and asymmetric slope distribution, the optical film having an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%.

3. An optical film comprising a structured major surface comprising geometrical asymmetry and symmetric slope distribution, wherein no more than about 7% of the structured major surface has a slope magnitude greater than about 3.5 degrees or no more than about 4% of the structured major surface has a slope magnitude greater than about 5 degrees.

4. An optical film comprising a structured major surface comprising geometrical asymmetry and symmetric slope distribution, the optical film having an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%.

Continuity (3)
Continuation 13375271
Provisional Application 61183154 · Jun 2, 2009
Related Publication 20140313587A1 · Oct 23, 2014