Patents by Inventor Ghidewon Arefe

Ghidewon Arefe 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).

  • Patent number: 10358344
    Abstract: An emissive article includes an OLED having a light emission surface, a circular polarizer, and a light extraction film optically between the OLED and the circular polarizer and being optically coupled to the light emission surface. The light extraction film includes a two-dimensional structured layer of extraction elements having a first index of refraction and a pitch in a range from 400 to 800 nm and a backfill layer including a material having a second index of refraction different from the first index of refraction.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 23, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
  • Publication number: 20180047944
    Abstract: An emissive article includes an OLED having a light emission surface, a circular polarizer, and a light extraction film optically between the OLED and the circular polarizer and being optically coupled to the light emission surface. The light extraction film includes a two-dimensional structured layer of extraction elements having a first index of refraction and a pitch in a range from 400 to 800 nm and a backfill layer including a material having a second index of refraction different from the first index of refraction.
    Type: Application
    Filed: October 23, 2017
    Publication date: February 15, 2018
    Inventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
  • Patent number: 9799853
    Abstract: An emissive article includes an OLED having a light emission surface, a circular polarizer, and a light extraction film optically between the OLED and the circular polarizer and being optically coupled to the light emission surface. The light extraction film includes a two-dimensional structured layer of extraction elements having a first index of refraction and a pitch in a range from 400 to 800 nm and a backfill layer including a material having a second index of refraction different from the first index of refraction.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: October 24, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
  • Publication number: 20170301888
    Abstract: The present disclosure provides novel light emitting devices including AMOLED displays, based on transparent OLED architecture, where a laminated nanostructured light extraction film can produce axial and integrated optical gains as well as improved angular luminance and color. Generally, the transparent AMOLED displays with laminated sub-micron extractors include: (a) an extractor on a transparent substrate for light outcoupling on both sides of the transparent device; or (b) an extractor on a reflective film for providing light outcoupling off the bottom side of the bottom-emitting (BE) AMOLED; or (c) an extractor on a light absorbing film for providing outcoupling off the bottom side of the BE AMOLED combined with improved ambient contrast.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 19, 2017
    Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-addo, William A. Tolbert
  • 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
  • Publication number: 20170110690
    Abstract: The present disclosure provides novel light emitting devices including AMOLED displays, based on transparent OLED architecture, where a laminated nanostructured light extraction film can produce axial and integrated optical gains as well as improved angular luminance and color. Generally, the transparent AMOLED displays with laminated sub-micron extractors include: (a) an extractor on a transparent substrate for light outcoupling on both sides of the transparent device; or (b) an extractor on a reflective film for providing light outcoupling off the bottom side of the bottom-emitting (BE) AMOLED; or (c) an extractor on a light absorbing film for providing outcoupling off the bottom side of the BE AMOLED combined with improved ambient contrast.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-addo, William A. Tolbert
  • Patent number: 9537116
    Abstract: The present disclosure provides novel light emitting devices including AMOLED displays, based on transparent OLED architecture, where a laminated nanostructured light extraction film can produce axial and integrated optical gains as well as improved angular luminance and color. Generally, the transparent AMOLED displays (100) with laminated sub-micron extractors (110a-c) include: (a) an extractor (110a) on a transparent substrate (112a) for light outcoupling on both sides of the transparent device (120); or (b) an extractor (110b) on a reflective film (112b) for providing light outcoupling off the bottom side of the bottom-emitting (BE) AMOLED (120); or (c) an extractor (110c) on a light absorbing film (112c) for providing outcoupling off the bottom side of the BE AMOLED (120) combined with improved ambient contrast.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: January 3, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-Addo, William A. Tolbert
  • Publication number: 20160197311
    Abstract: An emissive article includes an OLED having a light emission surface, a circular polarizer, and a light extraction film optically between the OLED and the circular polarizer and being optically coupled to the light emission surface. The light extraction film includes a two-dimensional structured layer of extraction elements having a first index of refraction and a pitch in a range from 400 to 800 nm and a backfill layer including a material having a second index of refraction different from the first index of refraction.
    Type: Application
    Filed: August 8, 2014
    Publication date: July 7, 2016
    Inventors: Sergey LAMANSKY, Ghidewon AREFE, Vivian W. JONES, James M. NELSON
  • Publication number: 20150325813
    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: Application
    Filed: November 21, 2013
    Publication date: November 12, 2015
    Inventors: Adam D. HAAG, Ghidewon AREFE, Kenneth A. EPSTEIN, Nathaniel K. NAISMITH, Seong Taek LEE, Sergey LAMANSKY, William A. TOLBERT
  • Publication number: 20150325816
    Abstract: An emissive display includes an OLED, a linear polarizer, a reflective polarizer optically between the OLED and the linear polarizer, and a structured optical film optically between the OLED and the reflective polarizer.
    Type: Application
    Filed: November 21, 2013
    Publication date: November 12, 2015
    Inventors: Adam D. HAAG, Ghidewon AREFE, Kenneth A. EPSTEIN, Nathaniel K. NAISMITH, Seong Taek LEE, Sergey LAMANSKY, William A. TOLBERT
  • Publication number: 20150228929
    Abstract: The present disclosure provides a light emitting device, an active matrix organic light emitting diode (AMOLED) device that includes the light emitting device, and an image display device that includes the light emitting device. In particular, the light emitting device includes a microcavity organic light emitting diode (OLED) (120), a light extraction film (110), and a high-index capping layer (122) disposed between the microcavity OLED and the light extraction film.
    Type: Application
    Filed: August 9, 2013
    Publication date: August 13, 2015
    Inventors: Sergey Lamansky, Seong T. Lee, Jonathan A. Anim-Addo, Ghidewon Arefe, Keith L. Behrman, James M. Nelson, Vivian W. Jones, William A. Tolbert
  • Publication number: 20150228931
    Abstract: The present disclosure provides novel light emitting devices including AMOLED displays, based on transparent OLED architecture, where a laminated nanostructured light extraction film can produce axial and integrated optical gains as well as improved angular luminance and color. Generally, the transparent AMOLED displays (100) with laminated sub-micron extractors (110a-c) include: (a) an extractor (110a) on a transparent substrate (112a) for light outcoupling on both sides of the transparent device (120); or (b) an extractor (110b) on a reflective film (112b) for providing light outcoupling off the bottom side of the bottom-emitting (BE) AMOLED (120); or (c) an extractor (110c) on a light absorbing film (112c) for providing outcoupling off the bottom side of the BE AMOLED (120) combined with improved ambient contrast.
    Type: Application
    Filed: August 15, 2013
    Publication date: August 13, 2015
    Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-Addo, William A. Tolbert
  • Patent number: 7458280
    Abstract: A process pressure fluid transmitter is coupled to a differential pressure producer and measures a differential pressure across the producer. A statistical parameter is calculated upon successive differential pressure indications, and the calculated parameter is used to indicate wet gas flow. The indication can be generated locally at the process pressure transmitter, communicated via a wired process communication loop, communicated wirelessly, or any combination thereof.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: December 2, 2008
    Assignee: Rosemount Inc.
    Inventors: David L. Wehrs, Russell N. Evans, Ghidewon Arefe
  • Publication number: 20070163362
    Abstract: A process pressure fluid transmitter is coupled to a differential pressure producer and measures a differential pressure across the producer. A statistical parameter is calculated upon successive differential pressure indications, and the calculated parameter is used to indicate wet gas flow. The indication can be generated locally at the process pressure transmitter, communicated via a wired process communication loop, communicated wirelessly, or any combination thereof.
    Type: Application
    Filed: January 18, 2007
    Publication date: July 19, 2007
    Inventors: David Wehrs, Russell Evans, Ghidewon Arefe