Patents by Inventor Tallis Chang
Tallis Chang 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: 11959806Abstract: Disclosed herein are MEMS devices and systems and methods of manufacturing or operating the MEMS devices and systems. In some embodiments, the MEMS devices and systems are used in imaging applications.Type: GrantFiled: April 10, 2023Date of Patent: April 16, 2024Assignee: Obsidian Sensors, Inc.Inventors: John Hong, Bing Wen, Edward Chan, Tallis Chang, Sean Andrews
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Publication number: 20240043264Abstract: Some embodiments include methods of manufacturing a plurality of MEMS devices, each device including a first material and a second material with different CTE. The method includes providing a carrier with substantially equal CTE as the first material, the carrier comprising a plurality of cavities. The method also includes positioning a plurality of components in respective cavities of the carrier, the components comprising the second material. In some embodiments, the method includes positioning a layer of the first material on the second material components. In some embodiments, the method includes bonding the first material layer and the second material components. The method also includes removing the carrier and singulating the first material layer to produce the plurality of MEMS devices.Type: ApplicationFiled: December 9, 2021Publication date: February 8, 2024Applicant: Obsidian Sensors, Inc.Inventors: Tallis CHANG, Sean ANDREWS
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Publication number: 20230314228Abstract: Disclosed herein are MEMS devices and systems and methods of manufacturing or operating the MEMS devices and systems. In some embodiments, the MEMS devices and systems are used in imaging applications.Type: ApplicationFiled: April 10, 2023Publication date: October 5, 2023Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Bing WEN, Edward CHAN, Tallis CHANG, Sean ANDREWS
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Publication number: 20230288258Abstract: Systems and methods for spectrometry are disclosed. In some embodiments, the system comprises a Fourier Transform Spectrometer (FTS) comprising a waveguide and a delay element. In some embodiments, the method comprises determining a power spectral density of an input optical signal via the FTS.Type: ApplicationFiled: March 14, 2023Publication date: September 14, 2023Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Bing WEN, Sean ANDREWS, Heesun SHIN, Edward CHAN, Tallis CHANG, Ming YING
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Publication number: 20230236067Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: ApplicationFiled: January 13, 2023Publication date: July 27, 2023Applicant: Obsidian Sensors, Inc.Inventors: Edward CHAN, Bing WEN, John HONG, Tallis CHANG, Seung-Tak RYU
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Patent number: 11685649Abstract: A method of manufacturing MEMS housings includes: providing glass spacers; providing a window plate; attaching the window plate to the glass spacers; aligning the glass spacers with a device glass plate having MEMS devices thereon; bonding the glass spacers to the device glass plate; and singulating the glass spacers, window plate, and device glass plate to produce the MEMS housings.Type: GrantFiled: March 20, 2019Date of Patent: June 27, 2023Assignee: Obsidian Sensors, Inc.Inventors: John Hong, Tallis Chang, Edward Chan, Bing Wen, Yaoling Pan, Kenji Nomura
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Patent number: 11624657Abstract: Disclosed herein are MEMS devices and systems and methods of manufacturing or operating the MEMS devices and systems for transmitting and detecting radiation. The devices and methods described herein are applicable to terahertz radiation. In some embodiments, the MEMS devices and systems are used in imaging applications. In some embodiments, a microelectromechanical system comprises a glass substrate configured to pass radiation from a first surface of the glass substrate through a second surface of the glass substrate, the glass substrate comprising TFT circuitry; a lid comprising a surface; spacers separating the lid and glass substrate; a cavity defined by the spacers, surface of the lid, and second surface of the glass substrate; a pixel in the cavity, positioned on the second surface of the glass substrate, electrically coupled to the TFT circuitry, and comprising an absorber to detect the radiation; and a reflector to direct the radiation to the absorbers and positioned on the lid.Type: GrantFiled: August 9, 2019Date of Patent: April 11, 2023Assignee: Obsidian Sensors, Inc.Inventors: John Hong, Bing Wen, Edward Chan, Tallis Chang, Sean Andrews
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Publication number: 20230061174Abstract: Microelectromechanical system (MEMS) devices, methods of operating the MEMS device, and methods of manufacturing the MEMS device are disclosed. In some embodiments, the MEMS device includes a glass substrate; an electrode on the glass substrate; a hinge mechanically coupled to the electrode; a membrane mirror mechanically coupled to the hinge; a TFT on the glass substrate and electrically coupled to the electrode; and a control circuit comprising: a multiplexer configured to turn on or turn off the TFT; and a drive source configured to provide a drive signal for charging the electrode through the TFT. An amplitude of the drive signal corresponds to an amount of charge, and the amount of charge generates an electrostatic force for actuating the hinge and a portion of the membrane mirror mechanically coupled to the hinge. In some embodiments, the MEMS devices comprise a charge transfer circuit for providing the amount of charge.Type: ApplicationFiled: August 26, 2022Publication date: March 2, 2023Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Tallis CHANG, Bing WEN, Edward CHAN, Sean ANDREWS, Heesun SHIN
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Publication number: 20230036855Abstract: Circuitries for controlling a power consuming device are disclosed. Methods for operating the circuitries and manufacturing the circuitries are also disclosed. In some embodiments, the circuit comprises a first thin-film transistor (TFT), a second TFT, and a storage capacitor. The first TFT is configured to output a current to a power consuming device. The second TFT is configured to provide a control voltage to the first TFT for controlling an amount of the current. The storage capacitor is configured to store the control voltage.Type: ApplicationFiled: July 28, 2022Publication date: February 2, 2023Applicant: Obsidian Sensors, Inc.Inventors: Heesun SHIN, John HONG, Tallis CHANG, Bing WEN
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Patent number: 11555744Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: GrantFiled: April 17, 2019Date of Patent: January 17, 2023Assignee: Obsidian Sensors, Inc.Inventors: Edward Chan, Bing Wen, John Hong, Tallis Chang, Seung-Tak Ryu
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Publication number: 20220411261Abstract: In some embodiments, electromechanical systems including a semiconductor layer that has a planar surface and includes conductive and adjacent non-conductive regions and a hermetic seal applied above the planar surface and methods of manufacturing the systems are disclosed. In some embodiments, electromechanical devices that include first and second planar semiconductor layers are disclosed. Each of the semiconductor layers includes conductive regions, and at least one conductive region from each of the layers is electrically coupled to each other. Methods of manufacturing the electromechanical devices are also disclosed.Type: ApplicationFiled: February 19, 2021Publication date: December 29, 2022Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Tallis CHANG, Sean ANDREWS, Jan BOS, Jia-Wei MA
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Publication number: 20210306535Abstract: An imaging device comprising two camera apertures and a method of capturing two fields of view using two camera apertures are disclosed.Type: ApplicationFiled: March 26, 2021Publication date: September 30, 2021Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Bing WEN, Tallis CHANG
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Publication number: 20210294093Abstract: Microelectromechanical system (MEMS) devices, methods of operating the MEMS device, and methods of manufacturing the MEMS device are disclosed. In some embodiments, the MEMS device includes a glass substrate; an electrode on the glass substrate; a hinge mechanically coupled to the electrode; a membrane mirror mechanically coupled to the hinge; a TFT on the glass substrate and electrically coupled to the electrode; and a control circuit comprising: a multiplexer configured to turn on or turn off the TFT; and a drive source configured to provide a drive signal for charging the electrode through the TFT. An amplitude of the drive signal corresponds to an amount of charge, and the amount of charge generates an electrostatic force for actuating the hinge and a portion of the membrane mirror mechanically coupled to the hinge.Type: ApplicationFiled: March 19, 2021Publication date: September 23, 2021Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Tallis CHANG, Bing WEN, Edward CHAN, Sean ANDREWS, Heesun SHIN
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Publication number: 20210164839Abstract: Disclosed herein are MEMS devices and systems and methods of manufacturing or operating the MEMS devices and systems for transmitting and detecting radiation. The devices and methods described herein are applicable to terahertz radiation. In some embodiments, the MEMS devices and systems are used in imaging applications. In some embodiments, a microelectromechanical system comprises a glass substrate configured to pass radiation from a first surface of the glass substrate through a second surface of the glass substrate, the glass substrate comprising TFT circuitry; a lid comprising a surface; spacers separating the lid and glass substrate; a cavity defined by the spacers, surface of the lid, and second surface of the glass substrate; a pixel in the cavity, positioned on the second surface of the glass substrate, electrically coupled to the TFT circuitry, and comprising an absorber to detect the radiation; and a reflector to direct the radiation to the absorbers and positioned on the lid.Type: ApplicationFiled: August 9, 2019Publication date: June 3, 2021Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Bing WEN, Edward CHAN, Tallis CHANG, Sean ANDREWS
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Publication number: 20210102844Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: ApplicationFiled: April 17, 2019Publication date: April 8, 2021Applicant: Obsidian Sensors, Inc.Inventors: Edward CHAN, Bing WEN, John HONG, Tallis CHANG, Seung-Tak RYU
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Publication number: 20210002130Abstract: A method of manufacturing MEMS housings includes: providing glass spacers; providing a window plate; attaching the window plate to the glass spacers; aligning the glass spacers with a device glass plate having MEMS devices thereon; bonding the glass spacers to the device glass plate; and singulating the glass spacers, window plate, and device glass plate to produce the MEMS housings.Type: ApplicationFiled: March 20, 2019Publication date: January 7, 2021Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Tallis CHANG, Edward CHAN, Bing WEN, Yaoling PAN, Kenji NOMURA
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Publication number: 20200407219Abstract: A method of manufacturing an electromechanical systems structure includes manufacturing sub-micron structural features. In some embodiments, the structural features are less than the lithographic limit of a lithography process.Type: ApplicationFiled: March 14, 2019Publication date: December 31, 2020Applicant: Obsidian Sensors, Inc.Inventors: John HONG, Tallis CHANG, Edward CHAN, Bing WEN, Yaoling PAN, Sean ANDREWS
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Publication number: 20180364439Abstract: Conventional optical lens assembly typically require a capping window, which is expensive, to protect the optical sensor. Also, each conventional optical lens assembly is discretely assembled, and thus incurs additional costs. To address these and other disadvantages, it is proposed to assemble a plurality of imaging sensors, a plurality of spacers, and a plurality of lenses at a panel. The resulting lens assembly array can be individualized into separate lens assemblies.Type: ApplicationFiled: June 16, 2017Publication date: December 20, 2018Applicant: OBSIDIAN SENSORS, INC.Inventors: Yaoling PAN, Jian MA, John HONG, Tallis CHANG
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Patent number: 9857593Abstract: Natural-scene light is polarized so the light exiting the polarizer and entering a glass assembly has a first polarization. Light having a second polarization substantially orthogonal to the first polarization is launched into the glass assembly and directed normal to the glass assembly and into a zone plate assembly, along with the natural-scene light. A first plurality of electric fields is established in the zone assembly to form at least one zone plate that modulates the launched light without modulating the natural-scene light. The first plurality of electric fields is disestablished and a second plurality of electric fields is established in the zone plate assembly to reposition the at least one zone plate in the liquid crystal plate. Disestablishment and establishment of electric fields is repeated at a sufficient rate so that an image defined by a number of pixel spots formed on a retina is perceived by a viewer.Type: GrantFiled: September 25, 2015Date of Patent: January 2, 2018Assignee: QUALCOMM IncorporatedInventors: John Hong, Jian Ma, Chong Lee, Tallis Chang, Jay Yun, Robert Sean Daley, Frederick Kim
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Publication number: 20160018657Abstract: Natural-scene light is polarized so the light exiting the polarizer and entering a glass assembly has a first polarization. Light having a second polarization substantially orthogonal to the first polarization is launched into the glass assembly and directed normal to the glass assembly and into a zone plate assembly, along with the natural-scene light. A first plurality of electric fields is established in the zone assembly to form at least one zone plate that modulates the launched light without modulating the natural-scene light. The first plurality of electric fields is disestablished and a second plurality of electric fields is established in the zone plate assembly to reposition the at least one zone plate in the liquid crystal plate. Disestablishment and establishment of electric fields is repeated at a sufficient rate so that an image defined by a number of pixel spots formed on a retina is perceived by a viewer.Type: ApplicationFiled: September 25, 2015Publication date: January 21, 2016Inventors: John Hong, Jian Ma, Chong Lee, Tallis Chang, Jay Yun, Robert Sean Daley, Frederick Kim