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:
Aug. 24, 2021
Filed:
Jan. 03, 2018
3m Innovative Properties Company, St. Paul, MN (US);
Kenneth A. Epstein, St. Paul, MN (US);
Nicholas A. Johnson, Burnsville, MN (US);
Robert M. Emmons, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Optical system including a lightguide; a turning film, including a first smooth surface perpendicular to a display axis and a first structured surface including a plurality of first microstructures defining a first plurality of parallel grooves, where the turning film is optically coupled to the lightguide, where the turning film outputs light collimated in a first plane parallel to the display axis; and a lenticular diffuser, including a second smooth surface perpendicular to the display axis and a second structured surface comprising a plurality of second microstructures defining a second plurality of parallel grooves extending along a plane perpendicular to the display axis, where the lenticular diffuser is optically coupled to the turning film, where the lenticular diffuser reflects or refracts collimated light toward a second plane perpendicular to the first plane; where the first plurality of parallel grooves is perpendicular to the second plurality of parallel grooves.