Patents by Inventor SUCHIT SHAH
SUCHIT SHAH 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: 12177611Abstract: A method includes receiving a light beam propagating along an optical path and operating a polarization rotator in a first state to produce an input right-hand circularly polarized beam or in a second state to produce an input left-hand circularly polarized beam. The method also includes converting, using a first diffractive element, the input right-hand circularly polarized beam into an intermediate left-hand circularly polarized beam or converting, using the first diffractive element, the input left-hand circularly polarized beam into an intermediate right-hand circularly polarized beam. The method also includes converting, using a second diffractive element, the intermediate left-hand circularly polarized beam into a right-hand circularly polarized output beam or converting, using the second diffractive element, the intermediate right-hand circularly polarized beam into a left-hand circularly polarized output beam.Type: GrantFiled: July 5, 2023Date of Patent: December 24, 2024Assignee: Amazon Technologies, Inc.Inventors: Haiwei Chen, Chulwoo Oh, Kibyung Seong, Seokchan Hong, Suchit Shah, Bo Qu
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Patent number: 11750780Abstract: A method includes receiving a light beam propagating along an optical path and operating a polarization rotator in a first state to produce an input right-hand circularly polarized beam or in a second state to produce an input left-hand circularly polarized beam. The method also includes converting, using a first diffractive element, the input right-hand circularly polarized beam into an intermediate left-hand circularly polarized beam or converting, using the first diffractive element, the input left-hand circularly polarized beam into an intermediate right-hand circularly polarized beam. The method also includes converting, using a second diffractive element, the intermediate left-hand circularly polarized beam into a right-hand circularly polarized output beam or converting, using the second diffractive element, the intermediate right-hand circularly polarized beam into a left-hand circularly polarized output beam.Type: GrantFiled: October 26, 2022Date of Patent: September 5, 2023Assignee: Amazon Technologies, Inc.Inventors: Haiwei Chen, Chulwoo Oh, Kibyung Seong, Seokchan Hong, Suchit Shah, Bo Qu
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Patent number: 11630325Abstract: Systems and methods are disclosed for augmented reality devices with prescription lenses. An example augmented reality device may include a frame and a lens coupled to the frame. The lens may include a prescription lens configured to refract light, the prescription lens having a first index of refraction value, a waveguide encapsulated in the prescription lens, the waveguide having a second index of refraction value, and a first coating layer disposed on a first side of the waveguide, the first coating layer having a third index of refraction value. The third index of refraction value may be less than the first index of refraction value, and the first index of refraction value may be less than the second index of refraction value.Type: GrantFiled: January 11, 2021Date of Patent: April 18, 2023Assignee: Amazon Technologies, Inc.Inventors: Angeles Marcia Almanza-Workman, Robert Waverly Zehner, Suchit Shah, Kibyung Seong, Jon H. Appleby
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Patent number: 11553163Abstract: A method includes receiving a light beam propagating along an optical path, converting, using a first diffractive element, a first portion of the light beam into a first circularly polarized beam, and a second portion of the light beam into a second circularly polarized beam. The method also includes converting, using a second diffractive element, the first circularly polarized beam into a first circularly polarized output beam, and the second circularly polarized beam into a second circularly polarized output beam.Type: GrantFiled: April 27, 2021Date of Patent: January 10, 2023Assignee: Amazon Technologies, Inc.Inventors: Haiwei Chen, Chulwoo Oh, Kibyung Seong, Seokchan Hong, Suchit Shah, Bo Qu
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Patent number: 11099469Abstract: Devices, systems, and methods are provided for an ultra-short throw projector. The projector may include an illuminator having an ellipsoidal reflector, a light emitting diode (LED) positioned inside of the ellipsoidal reflector, and a Fresnel lens positioned inside of the ellipsoidal reflector. The projector may include a circular transmissive liquid crystal display (LCD) and a three-element plastic projection lens positioned outside of the ellipsoidal reflector, wherein the circular transmissive LCD is positioned between the ellipsoidal reflector and the three-element plastic projection lens, wherein the ellipsoidal reflector reflects light emitted by the LED, wherein the Fresnel lens refracts light emitted by the LED, and wherein the three-element plastic projection lens projects the reflected light and the refracted light.Type: GrantFiled: November 11, 2019Date of Patent: August 24, 2021Assignee: Amazon Technologies, Inc.Inventors: Gareth James Selfe, Eric Gifford Marason, Suchit Shah, Robert Domingo Lau, John Larkin, Mark Steven Pearson
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Patent number: 10222532Abstract: A light mixing chamber includes a housing having a channel formed therein, with the channel exposed to an exterior of the housing. A chamber is formed in the housing, and an aperture formed in the housing connects the chamber to the channel. The chamber may house an LED, with an optical member being retained within the channel. A light guide plate may be positioned on an exterior of the housing outside the channel.Type: GrantFiled: July 10, 2014Date of Patent: March 5, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Warren Pumyea, Sridhar Sadasivan, Suchit Shah
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Publication number: 20180122613Abstract: Systems and methods are described that relate to quantum dot (QD) structures for lighting applications. In particular, quantum dots and quantum dot containing inks (comprising mixtures of different wavelength quantum dots) are synthesized for desired optical properties and integrated with an LED source to create a trichromatic white light source. The LED source may be integrated with the quantum dots in a variety of ways, including through the use of a small capillary filled with quantum dot containing ink or a quantum dot containing film placed appropriately within the optical system. These systems may result in improved displays characterized by higher color gamuts, lower power consumption, and reduced cost.Type: ApplicationFiled: December 29, 2017Publication date: May 3, 2018Inventors: Sridhar SADASIVAN, John R. LINTON, David R. GILDEA, Seth COE-SULLIVAN, Suchit SHAH, Robert J. NICK
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Publication number: 20150009686Abstract: A light mixing chamber includes a housing having a channel formed therein, with the channel exposed to an exterior of the housing. A chamber is formed in the housing, and an aperture formed in the housing connects the chamber to the channel. The chamber may house an LED, with an optical member being retained within the channel. A light guide plate may be positioned on an exterior of the housing outside the channel.Type: ApplicationFiled: July 10, 2014Publication date: January 8, 2015Inventors: WARREN PUMYEA, SRIDHAR SADASIVAN, SUCHIT SHAH
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Publication number: 20120113671Abstract: Systems and methods are described that relate to quantum dot (QD) structures for lighting applications. In particular, quantum dots and quantum dot containing inks (comprising mixtures of different wavelength quantum dots) are synthesized for desired optical properties and integrated with an LED source to create a trichromatic white light source. The LED source may be integrated with the quantum dots in a variety of ways, including through the use of a small capillary filled with quantum dot containing ink or a quantum dot containing film placed appropriately within the optical system. These systems may result in improved displays characterized by higher color gamuts, lower power consumption, and reduced cost.Type: ApplicationFiled: August 9, 2011Publication date: May 10, 2012Inventors: SRIDHAR SADASIVAN, John R. Linton, David R. Gildea, Seth Coe-Sullivan, Suchit Shah, Robert J. Nick
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Publication number: 20110203632Abstract: Photovoltaic (PV) devices employing layers of semiconducting carbon nanotubes as light absorption elements are disclosed. In one aspect a layer of p-type carbon nanotubes and a layer of n-type carbon nanotubes are used to form a p-n junction PV device. In another aspect a mixed layer of p-type and n-type carbon nanotubes are used to form a bulk hetero-junction PV device. In another aspect a metal such as a low work function metal electrode is formed adjacent to a layer of semiconducting nanotubes to form a Schottky barrier PV device. In another aspect various material deposition techniques well suited to working with nanotube layers are employed to realize a practical metal-insulator-semiconductor (MIS) PV device. In another aspect layers of metallic nanotubes are used to provide flexible electrode elements for PV devices. In another aspect layers of metallic nanotubes are used to provide transparent electrode elements for PV devices.Type: ApplicationFiled: February 22, 2010Publication date: August 25, 2011Inventors: RAHUL SEN, SUCHIT SHAH, HAO-YU LIN, THOMAS RUECKES