Patents by Inventor Apoorva Murarka
Apoorva Murarka 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: 11754394Abstract: This invention discloses a method for measuring the rate of angular displacement, of a traveling object, using magnetic field sensing, said method comprising: measuring magnetic field intensity and/or changes in said magnetic field intensity, projected onto a magnetic field sensor coupled to said traveling object, each measurement being per orthogonal rotation axis to provide a magnetic field intensity value per axis and/or a change in magnetic field intensity per axis, as said object's orientation changes with time; determining, number of peaks, present in a measurement sample comprising a set of said measurements, of time duration; and computing said rate of angular displacement, for said traveling object, as a function of said determined number of peaks and said time duration.Type: GrantFiled: August 21, 2020Date of Patent: September 12, 2023Assignee: SEEHOW PTE. LTD.Inventors: Apoorva Murarka, Dev Chandan Behera
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Publication number: 20220155159Abstract: Described embodiments provide an electromechanical transducer including a mechanically compliant, elastically deformable array of dielectric shells. A first electrically conductive electrode is disposed on a first surface of the array. A second electrically conductive electrode is disposed on a second surface of the array, where the second surface opposes the first surface. The array is configured to be mechanically compliant and elastically deformable in response to one or more incident forces applied to the electromechanical transducer.Type: ApplicationFiled: March 13, 2020Publication date: May 19, 2022Inventors: Vladimir BULOVIC, Apoorva MURARKA, Damien REARDON, Jeffrey H. LANG, Jinchi HAN
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Patent number: 11190868Abstract: Briefly, in accordance with one or more embodiments, a headphone device, comprises at least one ear muff comprising a structure to hold the at least one ear muff against an ear of a user, and at least one driver disposed in the at least one ear muff. An earbud comprises an earbud housing having a protrusion to fit into an external acoustic meatus or ear canal of a user, and a driver disposed in the earbud housing. The driver comprises an electrostatic acoustic transducer comprising a substrate comprising a first material to function as a first electrode, a dielectric layer coupled with the first material, wherein the dielectric layer has one or more cavities formed therein, and a membrane coupled with the dielectric layer to cover the one or more cavities and to function as a second electrode.Type: GrantFiled: April 18, 2018Date of Patent: November 30, 2021Assignee: Massachusetts Institute of TechnologyInventors: Apoorva Murarka, Vladimir Bulovic, Jeffrey H. Lang
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Patent number: 10986435Abstract: Briefly, in accordance with one or more embodiments, a hearing aid comprises a housing and an audio processing system disposed in the housing, the audio processing system comprising at least one amplifier, an earbud formed as part of the housing or coupled to the housing to fit into an external acoustic meatus or ear canal of a user, one or more microphones coupled to an input of the amplifier, and one or more drivers coupled to an output of the amplifier to reproduce an amplified version of an input acoustic wave impinging on the one or more microphones. The audio processing system including a processor coupled between the microphone and the driver, wherein the processor is to provide one or more hearing correction functions. At least one of the one or more drivers or the one or more microphones, or a combination thereof, comprises an electrostatic acoustic transducer.Type: GrantFiled: April 18, 2018Date of Patent: April 20, 2021Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Apoorva Murarka, Vladimir Bulovic, Jeffrey H. Lang
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Publication number: 20210055107Abstract: This invention discloses a method for measuring the rate of angular displacement, of a traveling object, using magnetic field sensing, said method comprising: measuring magnetic field intensity and/or changes in said magnetic field intensity, projected onto a magnetic field sensor coupled to said traveling object, each measurement being per orthogonal rotation axis to provide a magnetic field intensity value per axis and/or a change in magnetic field intensity per axis, as said object's orientation changes with time; determining, number of peaks, present in a measurement sample comprising a set of said measurements, of time duration; and computing said rate of angular displacement, for said traveling object, as a function of said determined number of peaks and said time duration.Type: ApplicationFiled: August 21, 2020Publication date: February 25, 2021Inventors: Apoorva Murarka, Dev Chandan Behera
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Patent number: 10570005Abstract: The disclosure provides methods and apparatus for release-assisted microcontact printing of MEMS. Specifically, the principles disclosed herein enable patterning diaphragms and conductive membranes on a substrate having articulations of desired shapes and sizes. Such diaphragms deflect under applied pressure or force (e.g., electrostatic, electromagnetic, acoustic, pneumatic, mechanical, etc.) generating a responsive signal. Alternatively, the diaphragm can be made to deflect in response to an external bias to measure the external bias/phenomenon. The disclosed principles enable transferring diaphragms and/or thin membranes without rupturing.Type: GrantFiled: September 5, 2012Date of Patent: February 25, 2020Assignee: Massachusetts Institute of TechnologyInventors: Apoorva Murarka, Vladimir Bulovic, Sarah Paydavosi
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Patent number: 10256596Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: GrantFiled: April 27, 2016Date of Patent: April 9, 2019Assignee: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey Hastings Lang, Apoorva Murarka, Annie I-Jen Wang, Wendi Chang
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Publication number: 20180367921Abstract: Briefly, in accordance with one or more embodiments, a hearing aid comprises a housing and an audio processing system disposed in the housing, the audio processing system comprising at least one amplifier, an earbud formed as part of the housing or coupled to the housing to fit into an external acoustic meatus or ear canal of a user, one or more microphones coupled to an input of the amplifier, and one or more drivers coupled to an output of the amplifier to reproduce an amplified version of an input acoustic wave impinging on the one or more microphones. The audio processing system including a processor coupled between the microphone and the driver, wherein the processor is to provide one or more hearing correction functions. At least one of the one or more drivers or the one or more microphones, or a combination thereof, comprises an electrostatic acoustic transducer.Type: ApplicationFiled: April 18, 2018Publication date: December 20, 2018Inventors: Apoorva MURARKA, Vladimir BULOVIC, Jeffrey H. LANG
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Publication number: 20180367884Abstract: Briefly, in accordance with one or more embodiments, a headphone device, comprises at least one ear muff comprising a structure to hold the at least one ear muff against an ear of a user, and at least one driver disposed in the at least one ear muff An earbud comprises an earbud housing having a protrusion to fit into an external acoustic meatus or ear canal of a user, and a driver disposed in the earbud housing. The driver comprises an electrostatic acoustic transducer comprising a substrate comprising a first material to function as a first electrode, a dielectric layer coupled with the first material, wherein the dielectric layer has one or more cavities formed therein, and a membrane coupled with the dielectric layer to cover the one or more cavities and to function as a second electrode.Type: ApplicationFiled: April 18, 2018Publication date: December 20, 2018Inventors: Apoorva Murarka, Vladimir Bulovic, Jeffrey H. Lang
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Publication number: 20180352338Abstract: Briefly, in accordance with one or more embodiments, an electrostatic acoustic transducer comprises a substrate comprising a first material to function as a first electrode, a dielectric layer coupled with the first material, wherein the dielectric layer has one or more cavities formed therein, and a membrane coupled with the dielectric layer to cover one or more of the one or more cavities and to function as a second electrode. The electrostatic acoustic transducer generates an acoustic wave in response to an electrical signal applied between the first electrode and the second electrode, wherein the applied electrical signal comprises a direct-current (dc) bias voltage and one or more time-varying electrical signals.Type: ApplicationFiled: April 18, 2018Publication date: December 6, 2018Inventors: Apoorva MURARKA, Vladimir BULOVIC, Jeffrey H. LANG
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Patent number: 9991076Abstract: Electromechanical devices described herein may employ tunneling phenomena to function as low-voltage switches. Opposing electrodes may be separated by an elastically deformable layer which, in some cases, may be made up of a non-electrically conductive material. In some embodiments, the elastically deformable layer is substantially free of electrically conductive material. When a sufficient actuation voltage and/or force is applied, the electrodes are brought toward one another and, accordingly, the elastically deformable layer is compressed. Though, the elastically deformable layer prevents the electrodes from making direct contact with one another. Rather, when the electrodes are close enough to one another, a tunneling current arises therebetween. The elastically deformable layer may exhibit spring-like behavior such that, upon release of the actuation voltage and/or force, the separation distance between electrodes is restored.Type: GrantFiled: January 28, 2014Date of Patent: June 5, 2018Assignee: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey H. Lang, Hae-Seung Lee, Timothy M. Swager, Trisha L. Andrew, Matthew Eric D'Asaro, Parag Deotare, Apoorva Murarka, Farnaz Niroui, Ellen Sletten, Annie I-Jen Wang
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Publication number: 20160380404Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: ApplicationFiled: April 27, 2016Publication date: December 29, 2016Inventors: Vladimir BULOVIC, Jeffrey Hastings LANG, Apoorva MURARKA, Annie I-Jen WANG, Wendi CHANG
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Patent number: 9419147Abstract: A method and apparatus for making analog and digital electronics which includes a composite including a squishable material doped with conductive particles. A microelectromechanical systems (MEMS) device has a channel made from the composite, where the channel forms a primary conduction path for the device. Upon applied voltage, capacitive actuators squeeze the composite, causing it to become conductive. The squishable device includes a control electrode, and a composite electrically and mechanically connected to two terminal electrodes. By applying a voltage to the control electrode relative to a first terminal electrode, an electric field is developed between the control electrode and the first terminal electrode. This electric field results in an attractive force between the control electrode and the first terminal electrode, which compresses the composite and enables electric control of the electron conduction from the first terminal electrode through the channel to the second terminal electrode.Type: GrantFiled: January 9, 2015Date of Patent: August 16, 2016Assignee: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey H. Lang, Sarah Paydavosi, Annie I-Jen Wang, Trisha L. Andrew, Apoorva Murarka, Farnaz Niroui, Frank Yaul, Jeffrey C. Grossman
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Patent number: 9391423Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: GrantFiled: November 13, 2014Date of Patent: July 12, 2016Assignee: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey Hastings Lang, Apoorva Murarka, Annie I-Jen Wang, Wendi Chang
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Patent number: 9352959Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: GrantFiled: November 13, 2014Date of Patent: May 31, 2016Assignee: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey Hastings Lang, Annie I-Jen Wang, Apoorva Murarka, Wendi Chang
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Publication number: 20160130138Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: ApplicationFiled: November 13, 2014Publication date: May 12, 2016Inventors: Vladimir BULOVIC, Jeffrey Hastings LANG, Annie I-Jen WANG, Apoorva MURARKA, Wendi CHANG
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Publication number: 20150357142Abstract: Electromechanical devices described herein may employ tunneling phenomena to function as low-voltage switches. Opposing electrodes may be separated by an elastically deformable layer which, in some cases, may be made up of a non-electrically conductive material. In some embodiments, the elastically deformable layer is substantially free of electrically conductive material. When a sufficient actuation voltage and/or force is applied, the electrodes are brought toward one another and, accordingly, the elastically deformable layer is compressed. Though, the elastically deformable layer prevents the electrodes from making direct contact with one another. Rather, when the electrodes are close enough to one another, a tunneling current arises therebetween. The elastically deformable layer may exhibit spring-like behavior such that, upon release of the actuation voltage and/or force, the separation distance between electrodes is restored.Type: ApplicationFiled: January 28, 2014Publication date: December 10, 2015Applicant: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Jeffrey H. Lang, Hae-Seung Lee, Timothy M. Swager, Trisha L. Andrew, Matthew Eric D'Asaro, Parag Deotare, Apoorva Murarka, Farnaz Niroui, Ellen Sletten, Annie I-Jen Wang
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Publication number: 20150309306Abstract: The disclosed embodiments provide sensitive pixel arrays formed using solvent-assisted or unassisted release processes. Exemplary devices include detectors arrays, tunable optical instruments, deflectable minors, digital micro-mirrors, digital light processing chips, tunable optical micro-cavity resonators, acoustic sensors, acoustic actuators, acoustic transducer devices and capacitive zipper actuators to name a few.Type: ApplicationFiled: May 19, 2014Publication date: October 29, 2015Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Apoorva MURARKA, Vladimir BULOVIC, Annie I-Jen WANG, Jeffrey Hastings LANG
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Publication number: 20150311664Abstract: The disclosure relates to method and apparatus for micro-contact printing of micro-electromechanical systems (“MEMS”) in a solvent-free environment. The disclosed embodiments enable forming a composite membrane over a parylene layer and transferring the composite structure to a receiving structure to form one or more microcavities covered by the composite membrane. The parylene film may have a thickness in the range of about 100 nm-2 microns; 100 nm-1 micron, 200-300 nm, 300-500 nm, 500 nm to 1 micron and 1-30 microns. Next, one or more secondary layers are formed over the parylene to create a composite membrane. The composite membrane may have a thickness of about 100 nm to 700 nm to several microns. The composite membrane's deflection in response to external forces can be measured to provide a contact-less detector. Conversely, the composite membrane may be actuated using an external bias to cause deflection commensurate with the applied bias.Type: ApplicationFiled: November 13, 2014Publication date: October 29, 2015Inventors: Vladimir BULOVIC, Jeffrey Hastings LANG, Apoorva MURARKA, Annie I-Jen WANG, Wendi CHANG
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Publication number: 20150268461Abstract: The disclosed embodiments provide sensitive pixel arrays formed using solvent-assisted or unassisted release processes. Exemplary devices include detectors arrays, tunable optical instruments, deflectable mirrors, digital micro-mirrors, digital light processing chips, tunable optical micro-cavity resonators, acoustic sensors, acoustic actuators, acoustic transducer devices and capacitive zipper actuators to name a few.Type: ApplicationFiled: February 25, 2014Publication date: September 24, 2015Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Apoorva MURARKA, Vladimir BULOVIC, Annie I-Jen WANG, Jeffrey Hastings LANG