公开(公告)号：US20210382222A1

公开(公告)日：2021-12-09

申请号：US17407521

申请日：2021-08-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kenneth A. EPSTEIN ,  Nicholas A. JOHNSON ,  Robert M. EMMONS

IPC: F21V8/00

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.

公开(公告)号：US20210088711A1

公开(公告)日：2021-03-25

申请号：US17040316

申请日：2019-03-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Nicholas A. JOHNSON ,  Robert M. EMMONS

IPC: F21V8/00

Abstract: A display device including a light source and a wedge lightguide defining a light-inlet side, a display side, and a back side, the display and back sides facing in different directions and forming a wedge-shape that defines a convergence axis, the light-inlet side positioned at a divergent side of the wedge-shape and the back side facing away from a display surface of the display device. The back side includes a plurality of wedge extractors, each wedge extractor extending in a direction substantially orthogonal to the convergence axis. The light source positioned adjacent to the light-inlet side of the wedge lightguide. The wedge lightguide is configured to receive light rays from the light source through the light-inlet side and transmit the light rays through the display side an exit angle with a maximum intensity at between about 10° and about 40° measured from a plane defined by the display side.

公开(公告)号：US20190339438A1

公开(公告)日：2019-11-07

申请号：US16475327

申请日：2018-01-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kenneth A. EPSTEIN ,  Nicholas A. JOHNSON ,  Robert M. EMMONS

IPC: F21V8/00

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.

公开(公告)号：US20190339427A1

公开(公告)日：2019-11-07

申请号：US16475186

申请日：2018-01-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Robert M. EMMONS ,  Kenneth A. EPSTEIN

IPC: G02B5/04 ,  G02B5/02 ,  F21V8/00 ,  F21V5/02

Abstract: An optical system including a light guide and a turning film that includes a first major surface, where the first major surface is substantially smooth and a second major surface including a plurality of asymmetric microstructures each respective asymmetric microstructure including a first side, where the first side is substantially planar, and a second side including a first surface segment defining a substantially planar surface and a second surface segment defining a non-planar surface.