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:
Sep. 08, 2009
Filed:
May. 16, 2006
Eric W. Nelson, Stillwater, MN (US);
Wei Feng Zhang, Shanghai, CN;
Eric W. Nelson, Stillwater, MN (US);
Wei Feng Zhang, Shanghai, CN;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A brightness enhancing film suitable for use in a display device is disclosed herein. The film comprises: a first polymeric layer having a microstructured surface, wherein the microstructured surface comprises an array of prism elements, and a second polymeric layer disposed adjacent to the first polymeric layer on the opposite side of the microstructured surface, wherein at least one of the first and second polymeric layers comprises a UV absorber that absorbs UV light and transmits visible light, such that the brightness enhancing film has an internal percent transmission of at least 95% at 410 nm, and at most 25% at 380 nm. Also disclosed herein is a brightness enhancing film wherein the UV absorber is in a third layer disposed between the first and second layers. The brightness enhancing films disclosed herein may be used in display devices such as LCD-TVs.