Patents by Inventor Madhusudanan Keezhveedi Sampath
Madhusudanan Keezhveedi Sampath 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: 11909248Abstract: A device in a wireless power system may be operable with a removable accessory such as a case. The device may transmit or receive wireless power through the case while the electronic device is coupled to the case. The case may have a folio shape with a front cover portion that covers the display of the electronic device. The case may have an embedded ferrimagnetic core that relays magnetic flux during wireless power transfer operations. Magnetic alignment structures in the case may position the ferrimagnetic core in the case in a high magnetic flux density region between the power transmitting device and the power receiving device. The ferrimagnetic core relays the magnetic flux between a transmitting coil in the power transmitting device and a receiving coil in the power receiving device. The ferrimagnetic core may be formed in a front portion, a sidewall, or a rear wall of a case.Type: GrantFiled: February 19, 2021Date of Patent: February 20, 2024Assignee: Apple Inc.Inventors: Zelin Xu, Nan Liu, Zaki Moussaoui, Gianpaolo Lisi, Kunal Bhargava, Madhusudanan Keezhveedi Sampath, Matthew J. Chabalko, Robert Scritzky
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Patent number: 11784511Abstract: A personal electronic device (e.g., a tablet computer) may be configured to wirelessly charge an accessory (e.g., a stylus) through a display face of the device. At least a portion of the display face may be transparent to facilitate display viewing. A wireless charging assembly disposed within the enclosure may include a core having one or more windings disposed thereon, which may be configured to generate a magnetic flux above the display face to couple to the accessory. The core may be a pot core, a modified pot core, or may have another shape, such as a PQ core. The one or more windings may be disposed on one or more posts of a pot core, or additionally or alternatively, may be disposed on another portion of the core. A metallic shield may be disposed about the wireless charging assembly, thereby surrounding multiple sides of the wireless charging assembly.Type: GrantFiled: March 30, 2021Date of Patent: October 10, 2023Assignee: Apple Inc.Inventors: Nan Liu, Madhusudanan Keezhveedi Sampath, Robert Scritzky, Gianpaolo Lisi, Saining Ren, Kunal Bhargava, Zaki Moussaoui, Zelin Xu
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Publication number: 20210408826Abstract: A personal electronic device (e.g., a tablet computer) may be configured to wirelessly charge an accessory (e.g., a stylus) through a display face of the device. At least a portion of the display face may be transparent to facilitate display viewing. A wireless charging assembly disposed within the enclosure may include a core having one or more windings disposed thereon, which may be configured to generate a magnetic flux above the display face to couple to the accessory. The core may be a pot core, a modified pot core, or may have another shape, such as a PQ core. The one or more windings may be disposed on one or more posts of a pot core, or additionally or alternatively, may be disposed on another portion of the core. A metallic shield may be disposed about the wireless charging assembly, thereby surrounding multiple sides of the wireless charging assembly.Type: ApplicationFiled: March 30, 2021Publication date: December 30, 2021Inventors: Nan Liu, Madhusudanan Keezhveedi Sampath, Robert Scritzky, Gianpaolo Lisi, Saining Ren, Kunal Bhargava, Zaki Moussaoui, Zelin Xu
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Publication number: 20210384754Abstract: A device in a wireless power system may be operable with a removable accessory such as a case. The device may transmit or receive wireless power through the case while the electronic device is coupled to the case. The case may have a folio shape with a front cover portion that covers the display of the electronic device. The case may have an embedded ferrimagnetic core that relays magnetic flux during wireless power transfer operations. Magnetic alignment structures in the case may position the ferrimagnetic core in the case in a high magnetic flux density region between the power transmitting device and the power receiving device. The ferrimagnetic core relays the magnetic flux between a transmitting coil in the power transmitting device and a receiving coil in the power receiving device. The ferrimagnetic core may be formed in a front portion, a sidewall, or a rear wall of a case.Type: ApplicationFiled: February 19, 2021Publication date: December 9, 2021Inventors: Zelin Xu, Nan Liu, Zaki Moussaoui, Gianpaolo Lisi, Kunal Bhargava, Madhusudanan Keezhveedi Sampath, Matthew J. Chabalko, Robert Scritzky
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Patent number: 11190050Abstract: An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.Type: GrantFiled: December 7, 2018Date of Patent: November 30, 2021Assignee: Apple Inc.Inventors: Gianpaolo Lisi, Madhusudanan Keezhveedi Sampath, Nan Liu, Tianqi Li, YiBo Liu, Yasin Aalipour
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Patent number: 11031164Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.Type: GrantFiled: September 10, 2018Date of Patent: June 8, 2021Assignee: Apple Inc.Inventors: Blake R. Marshall, Florence W. Ow, Joel N. Ruscher, Liquan Tan, Aidan N. Zimmerman, Reza Nasiri Mahalati, Hao Zhu, Qigen Ji, Madhusudanan Keezhveedi Sampath, Nan Liu, Robert Scritzky, Gianpaolo Lisi
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Patent number: 10725515Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.Type: GrantFiled: September 10, 2018Date of Patent: July 28, 2020Assignee: Apple Inc.Inventors: Blake R. Marshall, Florence W. Ow, Joel N. Ruscher, Liquan Tan, Aidan N. Zimmerman, Reza Nasiri Mahalati, Hao Zhu, Qigen Ji, Madhusudanan Keezhveedi Sampath, Nan Liu, Robert Scritzky, Gianpaolo Lisi
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Patent number: 10720789Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: GrantFiled: March 22, 2019Date of Patent: July 21, 2020Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Patent number: 10707627Abstract: Hybrid connectors that may transfer power and data with a variety of electronic devices having different types of connector interfaces, may consume a minimal amount of surface area, depth, and volume in an electronic device, and may be readily manufactured.Type: GrantFiled: September 23, 2018Date of Patent: July 7, 2020Assignee: Apple Inc.Inventors: Reza Nasiri Mahalati, Blake R. Marshall, Liquan Tan, Florence W. Ow, Alex C. Yeung, John Raff, Robert Scritzky, Wei-Hsuan Chen, Eric S. Jol, Madhusudanan Keezhveedi Sampath, Nan Liu, Gianpaolo Lisi, YiBo Liu
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Publication number: 20200083746Abstract: An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.Type: ApplicationFiled: December 7, 2018Publication date: March 12, 2020Inventors: Gianpaolo Lisi, Madhusudanan Keezhveedi Sampath, Nan Liu, Tianqi Li, YiBo Liu, Yasin Aalipour
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Publication number: 20190278349Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.Type: ApplicationFiled: May 24, 2019Publication date: September 12, 2019Applicant: Apple Inc.Inventors: Blake R. Marshall, Florence W. Ow, Joel N. Ruscher, Liquan Tan, Aidan N. Zimmerman, Reza Nasiri Mahalati, Hao Zhu, Qigen Ji, Madhusudanan Keezhveedi Sampath, Nan Liu, Robert Scritzky, Gianpaolo Lisi
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Publication number: 20190222052Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: ApplicationFiled: March 22, 2019Publication date: July 18, 2019Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Patent number: 10333333Abstract: A wireless charging table comprising a table top having an upper surface upon which one or more electronic devices can be placed, a wireless charging transmitter positioned under the upper surface of the table top, the wireless charging transmitter comprising a plurality of transmitter coils that define a charging region at the upper surface of the table top, and a power distribution system operatively coupled to the wireless charging transmitter, the power distribution system configured to receive power from an alternating current (AC) power source and distribute power to the wireless charging transmitter. The plurality of transmitter coils include at least a first transmitter coil comprising: a first loop portion; a second loop portion; and a crossing portion comprising overlapping conductive paths that electrically couple the first loop portion.Type: GrantFiled: June 16, 2016Date of Patent: June 25, 2019Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20190138073Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.Type: ApplicationFiled: September 10, 2018Publication date: May 9, 2019Applicant: Apple Inc.Inventors: Blake R. Marshall, Florence W. Ow, Joel N. Ruscher, Liquan Tan, Aidan N. Zimmerman, Reza Nasiri Mahalati, Hao Zhu, Qigen Ji, Madhusudanan Keezhveedi Sampath, Nan Liu, Robert Scritzky, Gianpaolo Lisi
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Patent number: 10277056Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: GrantFiled: June 16, 2016Date of Patent: April 30, 2019Assignee: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20190103715Abstract: Hybrid connectors that may transfer power and data with a variety of electronic devices having different types of connector interfaces, may consume a minimal amount of surface area, depth, and volume in an electronic device, and may be readily manufactured.Type: ApplicationFiled: September 23, 2018Publication date: April 4, 2019Applicant: Apple Inc.Inventors: Reza Nasiri Mahalati, Blake R. Marshall, Liquan Tan, Florence W. Ow, Alex C. Yeung, John Raff, Robert Scritzky, Wei-Hsuan Chen, Eric S. Jol, Madhusudanan Keezhveedi Sampath, Nan Liu, Gianpaolo Lisi, YiBo Liu
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Publication number: 20190103764Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.Type: ApplicationFiled: September 10, 2018Publication date: April 4, 2019Applicant: Apple Inc.Inventors: Blake R. Marshall, Florence W. Ow, Joel N. Ruscher, Liquan Tan, Aidan N. Zimmerman, Reza Nasiri Mahalati, Hao Zhu, Qigen Ji, Madhusudanan Keezhveedi Sampath, Nan Liu, Robert Scritzky, Gianpaolo Lisi
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Publication number: 20160372961Abstract: A wireless charging table comprising a table top having an upper surface upon which one or more electronic devices can be placed, a wireless charging transmitter positioned under the upper surface of the table top, the wireless charging transmitter comprising a plurality of transmitter coils that define a charging region at the upper surface of the table top, and a power distribution system operatively coupled to the wireless charging transmitter, the power distribution system configured to receive power from an alternating current (AC) power source and distribute power to the wireless charging transmitter. The plurality of transmitter coils include at least a first transmitter coil comprising: a first loop portion; a second loop portion; and a crossing portion comprising overlapping conductive paths that electrically couple the first loop portion.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith
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Publication number: 20160372960Abstract: A wireless charging system including a transmitter and a receiver. The transmitter is formed of a coil of wire that includes a first loop portion, a second loop portion, and a crossing portion. The crossing portion electrically couples the first loop portion and the second loop portion such that when current is generated in the coil, electrical current flows through the first loop portion in a different rotational direction than in the second loop portion. The receiver is formed of a ferromagnetic core and multiple (e.g., three) coils disposed about the ferromagnetic core. Each coil may be disposed about a different axis of the core such that current may be induced in at least one of the coils by a magnetic field in any direction.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Applicant: Apple Inc.Inventors: David W. Ritter, David B. Kosecoff, David S. Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft, Aditya Rao, Ariadne Smith