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公开(公告)号：US20220139615A1
公开(公告)日：2022-05-05
申请号：US17176685
申请日：2021-02-16
Applicant: Google LLC
Inventor： Liyu Yang , Liang Jia , Srikanth Lakshmikanthan , Li Wang , Qi Tian , YungChih Chen , Veera Venkata Siva Nagesh Polu , Stefano Saggini , Mario Ursino , Ruben Specogna
Abstract: This document describes techniques and apparatuses directed at reducing inductive-charging power loss. In aspects, a mobile device includes a multi-layer flexible printed circuit board (FPCB) coil that forms a receiver coil having a Litz-wire structure. The FPCB coil includes a multi-trace bundle, having traces systematically routed throughout the different layers of the FPCB coil to reduce eddy current losses.
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公开(公告)号：US11171522B2
公开(公告)日：2021-11-09
申请号：US16393526
申请日：2019-04-24
Applicant: Google LLC
Inventor： Liang Jia , Qi Tian , Liyu Yang , Veera Venkata Siva Nagesh Polu , Srikanth Lakshmikanthan , Rahul Apte , Jae-won Hwang , Srenik Suresh Mehta
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.
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公开(公告)号：US11417461B2
公开(公告)日：2022-08-16
申请号：US17176685
申请日：2021-02-16
Applicant: Google LLC
Inventor： Liyu Yang , Liang Jia , Srikanth Lakshmikanthan , Li Wang , Qi Tian , YungChih Chen , Veera Venkata Siva Nagesh Polu , Stefano Saggini , Mario Ursino , Ruben Specogna
Abstract: This document describes techniques and apparatuses directed at reducing inductive-charging power loss. In aspects, a mobile device includes a multi-layer flexible printed circuit board (FPCB) coil that forms a receiver coil having a Litz-wire structure. The FPCB coil includes a multi-trace bundle, having traces systematically routed throughout the different layers of the FPCB coil to reduce eddy current losses.
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公开(公告)号：US11342796B2
公开(公告)日：2022-05-24
申请号：US16125328
申请日：2018-09-07
Applicant: Google LLC
Inventor： Qi Tian , Veera Venkata Siva Nagesh Polu , Liang Jia , Liyu Yang , Jae-won Hwang , Rahul Apte , Srikanth Lakshmikanthan , Srenik Suresh Mehta , Robert Thomas Shone
Abstract: Methods, systems, and techniques for safely controlling wireless charging in the presence of a foreign object are presented. A method includes determining a power difference between a power transmitted by a wireless charger and a power received by an electronic device, determining a level of misalignment of the electronic device with respect to the wireless charger; estimating an amount of power difference due to the level of misalignment of the electronic device with respect to the wireless charger, adjusting a power difference threshold for the wireless charger based on the estimated amount of power difference, and controlling operation of the wireless charger based on the power difference and the adjusted power difference threshold.
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公开(公告)号：US20220115918A1
公开(公告)日：2022-04-14
申请号：US17065595
申请日：2020-10-08
Applicant: Google LLC
Inventor： Qi Tian , Liang Jia , Tressa Christie Scott , Srikanth Lakshmikanthan
Abstract: The present disclosure provides for a wearable device having a wireless power receiving system that may inductively receive or transmit power. The wireless power receiving system includes a receiver coil having a profile that follows a contour of a bottom cover of the wearable device. A transmitter coil from a wireless charging device has a complementary profile that mates with the profile defined by the receiver coil. In one example, the wireless power receiving system includes a shielding, and a receiver coil attached to the shielding. The receiver coil further includes an inner wall and an outer wall connected by a top surface of a coil body. The inner wall defines a center opening in the receiver coil, wherein the receiver coil is conical in shape.
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Patent Agency Ranking
公开(公告)号：US20240371565A1
公开(公告)日：2024-11-07
申请号：US18742738
申请日：2024-06-13
Applicant: Google LLC
Inventor： Li Wang , Liyu Yang , Stefano Saggini , Liang Jia , Yanchao Li , Zhenxue Xu , Haoquan Zhang , Mauricio Antonio Alvarado Ortega , Giulia Segatti , Pingsheng Wu , Srikanth Lakshmikanthan , Qi Tian , Veera Venkata Siva Nagesh Polu , Yung-Chih Chen , Yi Lin Chen , Wei Chen Tu
Abstract: A wireless charging receiver that includes a first coil, a second coil, and a nanocrystalline sheet is disclosed. The first coil is configured to be located within a recess in the nanocrystalline sheet and is positioned between the second coil and the nanocrystalline sheet. The first coil includes first and second terminals and the second coil includes third and fourth terminals. The first terminal is connected to the third terminal and the second terminal is connected to the fourth terminal to electrically connect the first coil to the second coil. The first coil may be formed of a flexible printed circuit board having a continuous trace or may be formed of litz wire. The first coil may be a hybrid coil with a first portion formed of a flexible printed circuit board having a continuous trace and with a second portion formed of litz wire.
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公开(公告)号：US20240204576A1
公开(公告)日：2024-06-20
申请号：US18591804
申请日：2024-02-29
Applicant: Google LLC
Inventor： Qi Tian , Liang Jia , Tressa Christie Scott , Srikanth Lakshmikanthan
Abstract: The present disclosure provides for a wearable device having a wireless power receiving system that may inductively receive or transmit power. The wireless power receiving system includes a receiver coil having a profile that follows a contour of a bottom cover of the wearable device. A transmitter coil from a wireless charging device has a complementary profile that mates with the profile defined by the receiver coil. In one example, the wireless power receiving system includes a shielding, and a receiver coil attached to the shielding. The receiver coil further includes an inner wall and an outer wall connected by a top surface of a coil body. The inner wall defines a center opening in the receiver coil, wherein the receiver coil is conical in shape.
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公开(公告)号：US11949251B2
公开(公告)日：2024-04-02
申请号：US17065595
申请日：2020-10-08
Applicant: Google LLC
Inventor： Qi Tian , Liang Jia , Tressa Christie Scott , Srikanth Lakshmikanthan
Abstract: The present disclosure provides for a wearable device having a wireless power receiving system that may inductively receive or transmit power. The wireless power receiving system includes a receiver coil having a profile that follows a contour of a bottom cover of the wearable device. A transmitter coil from a wireless charging device has a complementary profile that mates with the profile defined by the receiver coil. In one example, the wireless power receiving system includes a shielding, and a receiver coil attached to the shielding. The receiver coil further includes an inner wall and an outer wall connected by a top surface of a coil body. The inner wall defines a center opening in the receiver coil, wherein the receiver coil is conical in shape.
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公开(公告)号：US20200343777A1
公开(公告)日：2020-10-29
申请号：US16393526
申请日：2019-04-24
Applicant: Google LLC
Inventor： Liang Jia , Qi Tian , Liyu Yang , Veera Venkata Siva Nagesh Polu , Srikanth Lakshmikanthan , Rahul Apte , Jae-won Hwang , Srenik Suresh Mehta
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.
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公开(公告)号：US20200083754A1
公开(公告)日：2020-03-12
申请号：US16125328
申请日：2018-09-07
Applicant: Google LLC
Inventor： Qi Tian , Veera Venkata Siva Nagesh Polu , Liang Jia , Liyu Yang , Jae-won Hwang , Rahul Apte , Srikanth Lakshmikanthan , Srenik Suresh Mehta , Robert Thomas Shone
Abstract: Methods, systems, and techniques for safely controlling wireless charging in the presence of a foreign object are presented. A method includes determining a power difference between a power transmitted by a wireless charger and a power received by an electronic device, determining a level of misalignment of the electronic device with respect to the wireless charger; estimating an amount of power difference due to the level of misalignment of the electronic device with respect to the wireless charger, adjusting a power difference threshold for the wireless charger based on the estimated amount of power difference, and controlling operation of the wireless charger based on the power difference and the adjusted power difference threshold.
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