05771328 is referenced by 257 patents and cites 38 patents.

A light directing film including a first surface and a second structured surface. The structured surface includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements with peaks disposed at a first distance from a reference plane and a second zone having a plurality of prism elements with peaks disposed less than the first distance from a reference plane. The width of the first zone preferably measures less than about 300 microns.

Title
Light directing film having variable height structured surface and light directing article constructed therefrom
Application Number
400052
Publication Number
5771328
Application Date
April 3, 1997
Publication Date
June 23, 1998
Inventor
Mark E Gardiner
Santa Rosa
CA, US
Sanford Cobb Jr
St. Mary's Point
MN, US
David L Wortman
St. Paul
MN, US
Agent
Stephen C Jensen
Stephen W Buckingham
Jed W Caven
Assignee
Minnesota Mining and Manufacturing Company
MN, US
IPC
G02B 6/00
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