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).
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Patent number: 10358344Abstract: 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: GrantFiled: October 23, 2017Date of Patent: July 23, 2019Assignee: 3M Innovative Properties CompanyInventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
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Publication number: 20180047944Abstract: 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: ApplicationFiled: October 23, 2017Publication date: February 15, 2018Inventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
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Patent number: 9799853Abstract: 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: GrantFiled: August 8, 2014Date of Patent: October 24, 2017Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Sergey Lamansky, Ghidewon Arefe, Vivian W. Jones, James M. Nelson
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Publication number: 20170301888Abstract: 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: ApplicationFiled: June 27, 2017Publication date: October 19, 2017Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-addo, William A. Tolbert
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Patent number: 9761843Abstract: 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: GrantFiled: November 21, 2013Date of Patent: September 12, 2017Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Adam D. Haag, Ghidewon Arefe, Kenneth A. Epstein, Nathaniel K. Naismith, Seong Taek Lee, Sergey Lamansky, William A. Tolbert
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Publication number: 20170110690Abstract: 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: ApplicationFiled: December 29, 2016Publication date: April 20, 2017Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-addo, William A. Tolbert
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Patent number: 9537116Abstract: 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: GrantFiled: August 15, 2013Date of Patent: January 3, 2017Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-Addo, William A. Tolbert
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Publication number: 20160197311Abstract: 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: ApplicationFiled: August 8, 2014Publication date: July 7, 2016Inventors: Sergey LAMANSKY, Ghidewon AREFE, Vivian W. JONES, James M. NELSON
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Publication number: 20150325813Abstract: 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: ApplicationFiled: November 21, 2013Publication date: November 12, 2015Inventors: Adam D. HAAG, Ghidewon AREFE, Kenneth A. EPSTEIN, Nathaniel K. NAISMITH, Seong Taek LEE, Sergey LAMANSKY, William A. TOLBERT
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Publication number: 20150325816Abstract: 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: ApplicationFiled: November 21, 2013Publication date: November 12, 2015Inventors: Adam D. HAAG, Ghidewon AREFE, Kenneth A. EPSTEIN, Nathaniel K. NAISMITH, Seong Taek LEE, Sergey LAMANSKY, William A. TOLBERT
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Publication number: 20150228929Abstract: 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: ApplicationFiled: August 9, 2013Publication date: August 13, 2015Inventors: Sergey Lamansky, Seong T. Lee, Jonathan A. Anim-Addo, Ghidewon Arefe, Keith L. Behrman, James M. Nelson, Vivian W. Jones, William A. Tolbert
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Publication number: 20150228931Abstract: 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: ApplicationFiled: August 15, 2013Publication date: August 13, 2015Inventors: Sergey Lamansky, Ghidewon Arefe, Keith L. Behrman, Steven J. McMan, Jonathan A. Anim-Addo, William A. Tolbert
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Patent number: 7458280Abstract: 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: GrantFiled: January 18, 2007Date of Patent: December 2, 2008Assignee: Rosemount Inc.Inventors: David L. Wehrs, Russell N. Evans, Ghidewon Arefe
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Publication number: 20070163362Abstract: 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: ApplicationFiled: January 18, 2007Publication date: July 19, 2007Inventors: David Wehrs, Russell Evans, Ghidewon Arefe