公开(公告)号：US11585966B2

公开(公告)日：2023-02-21

申请号：US17174548

申请日：2021-02-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kenneth A. Epstein ,  Nicholas A. Johnson ,  Michael E. Lauters ,  Shannon L. Siefken ,  Gary T. Boyd

IPC: G02B5/04 ,  F21V5/08 ,  G02F1/13 ,  G02F1/13357

Abstract: The disclosure describes asymmetric turning films (ATFs) that may be used in conjunction with multiple light sources in a liquid crystal display assembly to provide multiple different characteristic output distributions of light. In some examples, the ATFs include a structured surface defining a plurality of microstructures having two or more faces with each face configured to reflect light in different directions. The microstructure may define a microstructure axis and an angle gradient characterizing the rotation of the microstructure axis across the structured surface of the ATF.

公开(公告)号：US20220019014A1

公开(公告)日：2022-01-20

申请号：US17309605

申请日：2019-12-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Robert M. Emmons ,  Kenneth A. Epstein ,  Nicholas A. Johnson

IPC: F21V8/00 ,  G02B5/02 ,  G02B5/04 ,  G02F1/13357

Abstract: An optical system comprises a turning film and a lenticular diffuser. The lenticular diffuser comprises a structured surface comprising a plurality of microstructures comprises a plurality of lenticular prisms separated by substantially flat land areas, the lenticular prisms having a rounded tip and two sides comprising a linear base section and a linear tip section connected by a polynomial blend section.

公开(公告)号：US20220019007A1

公开(公告)日：2022-01-20

申请号：US17309603

申请日：2019-12-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Daniel J. Schmidt ,  Caleb T. Nelson ,  Kevin W. Gotrik ,  Raymond J. Kenney ,  Kenneth A. Epstein ,  Gary T. Boyd ,  Corey D. Balts ,  Morgan A. Priolo ,  John A. Wheatley ,  Elisa M. Cross

IPC: G02B5/22

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, an absorptive layer or reflective layer is disposed between the alternating transmissive regions and absorptive regions and the light input surface and/or light output surface. In another embodiment, the alternating transmissive regions comprise an absorptive material. The light control film can exhibit low transmission of visible light and high transmission of near infrared light. Also described is a light detection system comprising such light control films and a microstructured film.

公开(公告)号：US11187847B2

公开(公告)日：2021-11-30

申请号：US16619300

申请日：2018-06-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Quinn D. Sanford ,  Kenneth A. Epstein ,  Matthew B. Johnson ,  Gary T. Boyd

IPC: F21V8/00 ,  G02B5/30

Abstract: Backlights are described. In particular, backlights including wide-web turning films and reflective polarizers having quarter-wave retarders are disclosed. Such configurations can provide turning film systems with improved luminance uniformity for large format displays.

公开(公告)号：US20200064525A1

公开(公告)日：2020-02-27

申请号：US16467221

申请日：2018-01-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristopher J. Derks ,  Tri D. Pham ,  Kenneth A. Epstein ,  David J. Lamb

IPC: G02B5/02

Abstract: An optical film (210) includes a microstructured surface (211) comprising a plurality of prismatic structures (230), the microstructured surface (211) defining a reference plane (241-242) and a thickness direction (243) perpendicular to the reference plane; wherein the plurality of prismatic structures includes a plurality of facets (231), each facet having a facet normal direction forming a polar angle with respect to the thickness direction and an azimuthal angle along the reference plane, and wherein the microstructured surface has a surface azimuthal distribution of the plurality of facets that is substantially uniform, and wherein the microstructured surface has a surface polar distribution of the plurality of facets that has an off-axis peak polar distribution.

公开(公告)号：US20200003935A1

公开(公告)日：2020-01-02

申请号：US16486313

申请日：2017-09-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John A. Wheatley ,  Michael A. McCoy ,  Tien Yi T.H. Whiting ,  Guanglei Du ,  Neeraj Sharma ,  Kui Chen-Ho ,  Kenneth A. Epstein

IPC: G02B5/124 ,  G02B5/30 ,  G02B27/28

Abstract: Retroreflecting articles are described. In particular, retroreflecting articles including a quarter wave retarder and a retroreflecting layer are described. The retarder is rotationally invariant and the retroreflecting layer is non-depolarizing. Such articles may be useful for sensor-detectable signs, labels, and garments.

公开(公告)号：US10031260B2

公开(公告)日：2018-07-24

申请号：US15105607

申请日：2014-12-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Scott E. Brigham ,  Kenneth A. Epstein ,  Kiran S Kanukurthy ,  John C. Schultz ,  Philip E Watson

IPC: G06Q30/02 ,  G01V8/20 ,  G09F27/00

Abstract: A sensor comprising a thin film photovoltaic pixel is fitted with optics to provide a field-of-view for the sensing of persons, or other objects, entering or exiting said field-of-view. When a person enters the field-of-view, a processor may sense such entry, then provide signals to other electronic apparatus indicative of such an event.

公开(公告)号：US20250067914A1

公开(公告)日：2025-02-27

申请号：US18944494

申请日：2024-11-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Daniel J. Schmidt ,  Caleb T. Nelson ,  Kevin W. Gotrik ,  Raymond J. Kenney ,  Kenneth A. Epstein ,  Gary T. Boyd ,  Corey D. Balts ,  Morgan A. Priolo ,  John A. Wheatley ,  Elisa M. Cross

IPC: G02B5/22

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, an absorptive layer or reflective layer is disposed between the alternating transmissive regions and absorptive regions and the light input surface and/or light output surface. In another embodiment, the alternating transmissive regions comprise an absorptive material. The light control film can exhibit low transmission of visible light and high transmission of near infrared light. Also described is a light detection system comprising such light control films and a microstructured film.

公开(公告)号：US12174407B2

公开(公告)日：2024-12-24

申请号：US17309603

申请日：2019-12-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Daniel J. Schmidt ,  Caleb T. Nelson ,  Kevin W. Gotrik ,  Raymond J. Kenney ,  Kenneth A. Epstein ,  Gary T. Boyd ,  Corey D. Balts ,  Morgan A. Priolo ,  John A. Wheatley ,  Elisa M. Cross

IPC: G02B5/22

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, an absorptive layer or reflective layer is disposed between the alternating transmissive regions and absorptive regions and the light input surface and/or light output surface. In another embodiment, the alternating transmissive regions comprise an absorptive material. The light control film can exhibit low transmission of visible light and high transmission of near infrared light. Also described is a light detection system comprising such light control films and a microstructured film.

公开(公告)号：US12164120B2

公开(公告)日：2024-12-10

申请号：US16467221

申请日：2018-01-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristopher J. Derks ,  Tri D. Pham ,  Kenneth A. Epstein ,  David J. Lamb

IPC: G02B5/02

Abstract: An optical film (210) includes a microstructured surface (211) comprising a plurality of prismatic structures (230), the microstructured surface (211) defining a reference plane (241-242) and a thickness direction (243) perpendicular to the reference plane; wherein the plurality of prismatic structures includes a plurality of facets (231), each facet having a facet normal direction forming a polar angle with respect to the thickness direction and an azimuthal angle along the reference plane, and wherein the microstructured surface has a surface azimuthal distribution of the plurality of facets that is substantially uniform, and wherein the microstructured surface has a surface polar distribution of the plurality of facets that has an off-axis peak polar distribution.