Invention Grant
- Patent Title: Light directing film and method for making the same
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Application No.: US12934855Application Date: 2009-04-01
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Publication No.: US09810817B2Publication Date: 2017-11-07
- Inventor: Alan B. Campbell , Dale L. Ehnes , John F. Van Derlofske, III , Mark R. Dupre , Stephen J. Dreyer , Patrick H. Marushin , Todd M. Johnson , Bryan V. Hunt
- Applicant: Alan B. Campbell , Dale L. Ehnes , John F. Van Derlofske, III , Mark R. Dupre , Stephen J. Dreyer , Patrick H. Marushin , Todd M. Johnson , Bryan V. Hunt
- Applicant Address: US MN Saint Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN Saint Paul
- Agent Daniel J. Iden
- International Application: PCT/US2009/039077 WO 20090401
- International Announcement: WO2009/124107 WO 20091008
- Main IPC: G02B5/04
- IPC: G02B5/04 ; F21V8/00 ; G02F1/1335

Abstract:
A light directing film includes a structured major surface with a plurality of microstructures extending along a first direction. Each microstructure has a first region and a second region different from the first region, a substantially constant height in the first region and a non-constant maximum height in the second region greater than the substantially constant height in the first region, and a same lateral cross sectional shape in the first region and the second region.
Public/Granted literature
- US20110199697A1 LIGHT DIRECTING FILM AND METHOD FOR MAKING THE SAME Public/Granted day:2011-08-18
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