The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2013
Filed:
Oct. 29, 2007
Kenneth A. Epstein, St. Paul, MN (US);
Richard F. Griffith, Minneapolis, MN (US);
Alan B. Campbell, Santa Rosa, CA (US);
Kenneth A. Epstein, St. Paul, MN (US);
Richard F. Griffith, Minneapolis, MN (US);
Alan B. Campbell, Santa Rosa, CA (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An optical film for use in transparent displays, such as reflective LCDs. The optical film has three-dimensional, prismatic structures that reflect incoming light. The prismatic structures are configured so that the reflecting facets orient the reflected light in desired reflective light pattern. The pattern shape and intensity can be controlled by the shape and dimensions of the various reflecting facets. In one embodiment, the height of the prismatic structure varies along two dimensions of the structure.