3m Innovative Properties Company

Stephen J Dreyer

Mark R Dupre

Bryan V Hunt

Alan B Campbell

Dale L Ehnes

John F Van Derlofske, Iii

Patrick H Marushin

Todd M Johnson

Adam H Hesselroth

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.

Light directing film and method for making the same

Test method for determining (e.g. prism) microstructure deformation of a microstructured (e.g. brightness enhancing) film are described.

Test method for determining microstructure deformation resistance of a microstructured film

Growing community of inventors

North St. Paul, MN, United States of America

Stephen J Dreyer