Patents by Inventor Kenneth A. Epstein

Kenneth A. Epstein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190346615
    Abstract: A light control film and display assemblies that includes such a film. The light control film including a substrate defining first and second major surfaces with the first major surface including a plurality louvers spanning in a first direction substantially perpendicular to a normal of the first major surface, and with the second major surface comprises a plurality of linear microstructures spanning in the first direction. In some examples, each louver of the plurality of louvers substantially aligns with a corresponding microstructure of the plurality of microstructures.
    Type: Application
    Filed: January 3, 2018
    Publication date: November 14, 2019
    Inventors: Nicholas A. JOHNSON, Richard V. PALLARINO, Kenneth A. EPSTEIN, Michael E. LAUTERS
  • Publication number: 20190339438
    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.
    Type: Application
    Filed: January 3, 2018
    Publication date: November 7, 2019
    Inventors: Kenneth A. EPSTEIN, Nicholas A. JOHNSON, Robert M. EMMONS
  • Publication number: 20190339427
    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.
    Type: Application
    Filed: January 3, 2018
    Publication date: November 7, 2019
    Inventors: Robert M. EMMONS, Kenneth A. EPSTEIN
  • Patent number: 10388230
    Abstract: Backlights are disclosed. More particularly, temporally multiplexed backlights utilizing asymmetric turning films are disclosed. The disclosed backlights are capable of displaying a primary image to on-axis viewers while simultaneously providing a secondary image to off-axis viewers.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: August 20, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Nicholas A. Johnson, Kenneth A. Epstein, James M. Hillis, Michael E. Lauters
  • Patent number: 10371350
    Abstract: Optical systems are disclosed. More particularly, optical systems including an asymmetric turning film (110) with at least a first (120) and second light source (130) are disclosed. Selection of geometries for the asymmetric turning film can enable different output viewing angles depending on the selective illumination of the first light source, the second light source, or both. The optical systems disclosed may be suitable in both luminaires and displays.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 6, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Nicholas A. Johnson, Gilles J. Benoit, John A. Wheatley, Kenneth A. Epstein, David Scott Thompson, Michael E. Lauters
  • Publication number: 20190216475
    Abstract: A medical device can include an elongate manipulation member, and a thrombectomy device connected to the elongate manipulation member. The thrombectomy device can have a first configuration and a second configuration, the thrombectomy device being expandable from the first configuration to the second configuration. The thrombectomy device can include an arcuate marker-mounting projection attached to a portion of the thrombectomy device configured to contact a thrombus. A marker can be coupled to, and extending around, the arcuate marker-mounting projection with the marker and the arcuate marker-mounting projection contacting each other at three discrete locations. A method for engaging a thrombus can include advancing a thrombectomy device to a location radially adjacent to a thrombus in a blood vessel.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Inventors: Evan Epstein, Kenneth Brown
  • Patent number: 10310284
    Abstract: A projection apparatus of reduced size and weight projects holographic images to a floating display position. An apparatus housing includes a laser projection system that outputs a laser beam, a beam diverter/splitter that receives and polarizes the laser beam, a concave mirror onto which the laser beam is diverted, and an adjustable lens or series of lenses to adjust the focus and/or size of images that are reflected from the concave mirror and through the adjustable lens. Rotating mirrors may be used instead of a beam diverter/splitter to draw images onto the concave mirror. Multiple apparatuses may be mounted around the floating display position for use as subsystems to synchronously project the holographic images for viewing from a 360° perspective. The multiple apparatuses or an individual apparatus may be used in conjunction with a conical mirror to display the images at a position above the conical mirror.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: June 4, 2019
    Inventors: Mary Gormley Waldron, Kenneth Epstein
  • Patent number: 10288796
    Abstract: Optical films are described. In particular, optical films that include top and bottom structured surfaces are described. Films that may be suitable for use in backlights as turning films or recycling films are also described. Optical films described may include reflective polarizers and optically birefringent substrates.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: May 14, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Gary T. Boyd, Robert M. Emmons, Kenneth A. Epstein
  • Patent number: 10114162
    Abstract: Optical film stacks are disclosed. The optical film stacks can include a first reflective polarizer, a second reflective polarizer, and a retardance layer disposed between the first reflective polarizer and the second reflective polarizer.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: October 30, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Kenneth A. Epstein, Adam D. Haag, Seo-Hern Lee, Youn Sihn Kim, Myeong-Kyun Kang
  • Publication number: 20180267228
    Abstract: A light guide includes a light input surface, a first major surface orthogonal to the light input surface, a second major surface opposing the first major, a plurality of discrete light extraction features disposed on the second major surface and a plurality of closely packed prisms disposed along the second major surface. The plurality of discrete light extraction features separate the plurality of closely packed prisms from the second major surface. Each of the closely packed prisms include a first prism surface forming a first angle with the second surface in a range from 80 to 100 degrees or in a range from 85 to 95 degrees or in a range from 87 to 93 degrees.
    Type: Application
    Filed: August 24, 2016
    Publication date: September 20, 2018
    Inventors: Kenneth A. EPSTEIN, John A. WHEATLEY, Tao LIU
  • Publication number: 20180246266
    Abstract: A light guide includes a light input surface, a first major surface orthogonal to the light input surface and a second major surface opposing the first major surface and forming a converging wedge with the first major surface. The second surface includes a plurality of doublet light extraction features closely-packed or separated by a land feature. Each doublet feature includes a first prism feature having a first shape and a second prism feature having a second shape and the second shape is different than the first shape.
    Type: Application
    Filed: August 25, 2016
    Publication date: August 30, 2018
    Inventors: Kenneth A. EPSTEIN, John A. WHEATLEY
  • Patent number: 10031260
    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.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: July 24, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Scott E. Brigham, Kenneth A. Epstein, Kiran S Kanukurthy, John C. Schultz, Philip E Watson
  • Publication number: 20180100963
    Abstract: Optical films are described. In particular, optical films that include top and bottom structured surfaces are described. Films that may be suitable for use in backlights as turning films or recycling films are also described. Optical films described may include reflective polarizers and optically birefringent substrates.
    Type: Application
    Filed: April 22, 2016
    Publication date: April 12, 2018
    Inventors: Gary T. Boyd, Robert M. Emmons, Kenneth A. Epstein
  • Publication number: 20180003364
    Abstract: An optical system including a lighting component and a switchable diffuser in optical communication with the lighting component. The optical system may further include a low absorbing optical component. At least one outer surface of the switchable diffuser and/or the low absorbing optical component includes light redirecting structures. When the switchable diffuser is in a first state and the optical system produces a light output, the light redirecting structures are configured to increase the full width at half-maximum (FWHM) of the light output of the optical system in at least one direction by at least 5 degrees relative to that of an otherwise equivalent optical system that does not include the light redirecting structures.
    Type: Application
    Filed: February 25, 2017
    Publication date: January 4, 2018
    Inventors: John A. Wheatley, Guanglei Du, Kenneth A. Epstein
  • Patent number: 9804311
    Abstract: A light control film, and light collimating assemblies and liquid crystal displays incorporating such light control films are described. The light control film includes alternating transmissive and absorptive regions, where the refractive index of each transmissive region is greater than the refractive index of each absorptive region. The absorptive regions form interfaces at angles that are close to the perpendicular to the light control film. A portion of the incident light intercepting the absorptive region undergoes Total Internal Reflection, and is transmitted through the film. The axial brightness of light passing through the film is increased, the brightness is more uniform within the viewing angle, and the viewing cutoff angle is sharpened.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: October 31, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Gary E. Gaides, Kenneth A. Epstein
  • Patent number: 9773847
    Abstract: The disclosure relates to emissive displays and, in particular, to emissive displays that include a top surface (111) that has a diffusely reflective inactive surface (116) adjacent a diffusely reflective emissive surface (114). The emissive display further includes a polarization selective antireflection film component (120) that includes a linear absorbing polarizer (126), a reflective polarizer (124), and a quarter-wave retarder (122), and is positioned separated from the top surface. The disclosure also relates to issues arising from these antireflection film components, such as brightness efficiency loss and image degradation such as pixel blur. The enhanced antireflection stack performs well in commercial OLED displays, with a 20% or greater brightness gain, a 30% or greater ambient light reflectance gain and no visually apparent image degradation.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: September 26, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth A. Epstein, Adam D. Haag, Seong Taek Lee, Sergey Lamansky
  • Patent number: 9761843
    Abstract: An emissive display comprising an OLED, a first birefringent reflective polarizer, a second birefringent reflective polarizer optically between the OLED and the first birefringent reflective polarizer, a first linear absorbing polarizer having a contrast ratio of less than 100:1 optically between the first birefringent reflective polarizer and the second birefringent reflective polarizer, a second linear absorbing polarizer having a contrast ratio of less than 100:1, where the first birefringent reflective polarizer is optically between the second linear absorbing polarizer and the first linear absorbing polarizer, and a structured optical film optically between the OLED and the second birefringent reflective polarizer.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: September 12, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Adam D. Haag, Ghidewon Arefe, Kenneth A. Epstein, Nathaniel K. Naismith, Seong Taek Lee, Sergey Lamansky, William A. Tolbert
  • Patent number: 9690038
    Abstract: A backlight includes a light source and one or more light recycling films. The light source generates light that exits the light source with an angular exit distribution. The light recycling films are oriented in relation to the light source so that the prism peaks of the recycling films are oriented away from the light source. The recycling films have a range of optimal incident angles that allow light to pass through the recycling films without recycling. The components of the light source, the characteristics of the recycling films, or both, are configured to control the overlap between the exit distribution of the light source and the optimal incident angle range of the recycling films.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: June 27, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Gary T. Boyd, Ji-Young Choi, John T. Cowher, Yasuyuki Daigo, Kenneth A. Epstein, Shandon D. Hart, Charles D. Hoyle, Min-Young Ji, Chideuk Kim, Byung-Soo Ko, Keith M. Kotchick, Wade D. Kretman, David J. Lamb, Seo-Hern Lee, Eric W. Nelson, Youngsoo Park, Xianneng Peng, Yuji Saito, Naoya Taniguchi, John F. Van Derlofske, III, Leland R. Whitney, Xingpeng Yang, Yang Yu, Jie Zhou, Rui Zhang
  • Publication number: 20170175976
    Abstract: Optical systems are disclosed. More particularly, optical systems including an asymmetric turning film (110) with at least a first (120) and second light source (130) are disclosed. Selection of geometries for the asymmetric turning film can enable different output viewing angles depending on the selective illumination of the first light source, the second light source, or both. The optical systems disclosed may be suitable in both luminaires and displays.
    Type: Application
    Filed: March 27, 2015
    Publication date: June 22, 2017
    Applicant: 3M Innovative Properties Company
    Inventors: Nicholas A. Johnson, Gilles J. Benoit, John A. Wheatley, Kenneth A. Epstein, David Scott Thompson, Michael E. Lauters
  • Publication number: 20170116930
    Abstract: Backlights are disclosed. More particularly, temporally multiplexed backlights utilizing asymmetric turning films are disclosed. The disclosed backlights are capable of displaying a primary image to on-axis viewers while simultaneously providing a secondary image to off-axis viewers.
    Type: Application
    Filed: May 18, 2015
    Publication date: April 27, 2017
    Inventors: Nicholas A. Johnson, Kenneth A. Epstein, James M. Hillis, Michael E. Lauters