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公开(公告)号：US20210384754A1
公开(公告)日：2021-12-09
申请号：US17179647
申请日：2021-02-19
Applicant: Apple Inc.
Inventor： Zelin Xu , Nan Liu , Zaki Moussaoui , Gianpaolo Lisi , Kunal Bhargava , Madhusudanan Keezhveedi Sampath , Matthew J. Chabalko , Robert Scritzky
Abstract: 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.
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公开(公告)号：US10938251B1
公开(公告)日：2021-03-02
申请号：US17016242
申请日：2020-09-09
Applicant: Apple Inc.
Inventor： Arash Mehrabi , Gianpaolo Lisi , Zaki Moussaoui
Abstract: A wireless power system may include an electronic device and a removable case. The electronic device and removable case may include wireless charging coils that are inductively coupled when the electronic device and the removable case are physically coupled. In a first mode, while the removable case is inductively coupled to the electronic device and the electronic device is not connected to a wired power source, a coil in the removable case transmits wireless power signals to the electronic device. In a second mode, while the removable case is inductively coupled to the electronic device and the electronic device is connected to a wired power source, the coil in the removable case receives wireless power signals from the electronic device. In a third mode, the removable case receives wireless power with a first coil and transmits wireless power to the electronic device with a second coil.
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公开(公告)号：US20190138073A1
公开(公告)日：2019-05-09
申请号：US16127072
申请日：2018-09-10
Applicant: Apple Inc.
Inventor： 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
Abstract: 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.
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公开(公告)号：US11784511B2
公开(公告)日：2023-10-10
申请号：US17217451
申请日：2021-03-30
Applicant: Apple Inc.
Inventor： Nan Liu , Madhusudanan Keezhveedi Sampath , Robert Scritzky , Gianpaolo Lisi , Saining Ren , Kunal Bhargava , Zaki Moussaoui , Zelin Xu
CPC classification number: H02J50/10 , G06F1/1626 , G06F1/182 , G06F3/038 , G06F3/03545 , H02J7/0042 , H02J7/02 , H02J50/005
Abstract: 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.
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公开(公告)号：US20230170717A1
公开(公告)日：2023-06-01
申请号：US18154383
申请日：2023-01-13
Applicant: Apple Inc.
Inventor： Ye Li , Antoin J. Russell , Stephen C. Terry , Adam L. Schwartz , Sumant Ranganathan , Gianpaolo Lisi
CPC classification number: H02J7/00711 , H02J50/80 , H02J50/70 , H02J50/12
Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.
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Patent Agency Ranking
公开(公告)号：US20210408826A1
公开(公告)日：2021-12-30
申请号：US17217451
申请日：2021-03-30
Applicant: Apple Inc.
Inventor： Nan Liu , Madhusudanan Keezhveedi Sampath , Robert Scritzky , Gianpaolo Lisi , Saining Ren , Kunal Bhargava , Zaki Moussaoui , Zelin Xu
Abstract: 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.
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公开(公告)号：US11031164B2
公开(公告)日：2021-06-08
申请号：US16127072
申请日：2018-09-10
Applicant: Apple Inc.
Inventor： 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
IPC: H01F7/02 , H02J50/10 , G06F1/26 , G06F3/038 , H02J50/90 , G06F3/0354 , H01F38/14 , H01F27/36 , G06F1/16
Abstract: 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.
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公开(公告)号：US12230980B1
公开(公告)日：2025-02-18
申请号：US17448155
申请日：2021-09-20
Applicant: Apple Inc.
Inventor： Ye Li , Gianpaolo Lisi , Bingyao Sun , Liang Chen , Gaurav Kalra , Rohan Dayal , Stephen C. Terry
Abstract: A wireless power system can include a wireless power transmitter and a wireless power receiver. The transmitter can include a transmit coil, an inverter, and inverter control circuitry that can operate one or more switching devices of the inverter to communicate information to the receiver by controlling a delay between receipt of the burst request pulse and initiating operation of the inverter and/or controlling a polarity of a first pulse of the inverter. The receiver can include a receive coil magnetically coupled to the transmit coil, a rectifier, and rectifier control circuitry that initiates a burst request pulse to initiate operation of a transmitter. The rectifier control circuitry can operate one or more switching devices of the rectifier to communicate information to the transmitter by at least one of short circuiting an LC tank including the receive coil or controlling a polarity of the burst request pulse.
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公开(公告)号：US11677255B1
公开(公告)日：2023-06-13
申请号：US17644005
申请日：2021-12-13
Applicant: Apple Inc.
Inventor： Ye Li , Antoin J. Russell , Stephen C. Terry , Adam L. Schwartz , Sumant Ranganathan , Gianpaolo Lisi
CPC classification number: H02J7/00711 , H02J50/12 , H02J50/70 , H02J50/80
Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.
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公开(公告)号：US20220006327A1
公开(公告)日：2022-01-06
申请号：US17187465
申请日：2021-02-26
Applicant: Apple Inc.
Inventor： Arash Mehrabi , Gianpaolo Lisi , Zaki Moussaoui
Abstract: A wireless power system may include an electronic device and a removable case. The electronic device and removable case may include wireless charging coils that are inductively coupled when the electronic device and the removable case are physically coupled. In a first mode, while the removable case is inductively coupled to the electronic device and the electronic device is not connected to a wired power source, a coil in the removable case transmits wireless power signals to the electronic device. In a second mode, while the removable case is inductively coupled to the electronic device and the electronic device is connected to a wired power source, the coil in the removable case receives wireless power signals from the electronic device. In a third mode, the removable case receives wireless power with a first coil and transmits wireless power to the electronic device with a second coil.
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