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公开(公告)号：US20250118998A1
公开(公告)日：2025-04-10
申请号：US18909702
申请日：2024-10-08
Applicant: Google LLC
Inventor： Zhenxue Xu , Shuo Wang , Liang Jia , Srikanth Lakshmikanthan , Yirui Yang
Abstract: An electronic device includes a wireless charging receive coil configured to transduce, into an alternating current (AC) power signal, a magnetic field generated by a wireless charging transmit coil of an external device; an active rectifier configured to convert the AC signal received at an AC side of the active rectifier into a direct current (DC) power signal output at a DC side of the active rectifier, the active rectifier comprising a plurality of switches; a first modulation capacitor connected to an upper rail of the AC side; a second modulation capacitor connected to a lower rail of the AC side; and a controller configured to adjust an impedance of the computing device to communicate with the external device by at least controlling the plurality of switches to cause the first modulation capacitor and the second modulation capacitor to charge during separate time periods.
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公开(公告)号：US12230985B2
公开(公告)日：2025-02-18
申请号：US18420318
申请日：2024-01-23
Applicant: Google LLC
Inventor： Liang Jia
IPC: H02J7/00
Abstract: This disclosure describes apparatuses and techniques for a switched multi-cell battery system for electronic devices. In some aspects, a switched multi-cell battery system may transfer, via a plurality of power control switches electrical power from a power adapter to components of the electronic device by charging battery cells in series and by discharging the battery cells in parallel or as a single battery cell. As a result, the switched multi-cell battery system may reduce or eliminate a voltage step-down conversion stage to increase a power-transfer efficiency of an electronic device. By doing so, charging times may be reduced or operating times may be increased, thereby improving users' experience with their electronic devices.
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公开(公告)号：US20240235262A9
公开(公告)日：2024-07-11
申请号：US18546120
申请日：2021-02-23
Applicant: Google LLC
CPC classification number: H02J50/10 , H02J50/402 , H02M7/219
Abstract: An example device (204) includes a wireless charging receive coil (222) configured to transduce, into an alternating current—AC—power signal, a magnetic field generated by a wireless charging transmit coil (218) of an external device (202); an active rectifier (224) configured to convert the AC signal into a direct current—DC—power signal; and circuitry (226) configured to: obtain a target level of the DC power signal; and control the active rectifier (224) to output the DC power signal with the target level.
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公开(公告)号：US12008176B2
公开(公告)日：2024-06-11
申请号：US18002192
申请日：2020-08-31
Applicant: Google LLC
Inventor： Liang Jia , Srikanth Lakshmikanthan , Liyu Yang
IPC: G06F3/0354 , H02J7/00 , H02J50/00 , H02J50/90
CPC classification number: G06F3/03545 , H02J7/0044 , H02J50/005 , H02J50/90
Abstract: An example active stylus includes a core comprising: a main cylinder having a first end, a second end; a first supplemental cylinder disposed at the first end of the main cylinder and having a diameter that is larger than a diameter of the main cylinder; a second supplemental cylinder disposed between the first supplemental cylinder and the second end of the main cylinder and having a diameter that is larger than the diameter of the main cylinder; and a wireless charging receive coil configured to transduce flux of a magnetic field generated by a wireless charging transmit coil into electrical current, wherein the wireless charging receive coil is positioned around a longitudinal axis of the main cylinder of the core and between the first supplemental cylinder and the second supplemental cylinder.
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公开(公告)号：US11923696B2
公开(公告)日：2024-03-05
申请号：US17274548
申请日：2020-02-12
Applicant: Google LLC
Inventor： Liang Jia , Srenik Suresh Mehta , Srikanth Lakshmikanthan
CPC classification number: H02J50/50 , H02J7/00047 , H02J50/12 , H02J2310/22
Abstract: This document describes a passive adapter for wireless charging of an electronic device and associated methods and systems. The described passive adapter includes two coils connected by a capacitor and separated by a core material that prevents mutual coupling between the coils. These two coils may have differing sizes, such that one coil can size-match to a transmitter coil of an existing wireless charger and the second coil can size-match to a smaller (or larger) receiver coil in a wireless-power receiver to charge a battery of the wireless-power receiver. In aspects, these two coils may be separated by a distance that enables the passive adapter to act as a passive repeater by bridging a space between the transmitter coil and the receiver coil.
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Patent Agency Ranking
公开(公告)号：US11881730B2
公开(公告)日：2024-01-23
申请号：US16975350
申请日：2019-09-06
Applicant: Google LLC
Inventor： Veera Venkata Siva Nagesh Polu , Liang Jia , Srikanth Lakshmikanthan
CPC classification number: H02J50/90 , H02J7/0013 , H02J50/12 , H02J50/40
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for wireless charging using time-division multiplexing. In some implementations, a wireless charger is configured to concurrently charge multiple devices by providing power wirelessly to individual devices in different time periods. The wireless charger can perform time-division multiplexing by selectively directing the output of a single driver circuit to different power transfer coil segments at different times. The wireless charging sessions of multiple devices can be maintained by repeating a pattern of activating different power transfer coil segments one by one in successive time periods.
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公开(公告)号：US11356146B2
公开(公告)日：2022-06-07
申请号：US16986522
申请日：2020-08-06
Applicant: Google LLC
Inventor： Liang Jia , Jae-Won Hwang
Abstract: The technology provides for a wearable device including a body and an accessory adapted to be attached to the body. The body includes a first coil configured to inductively transmit power. The body may further include first power management circuitry configured to control the first coil to transmit power according to a wireless charging standard, and to modulate the power transmitted through the first coil to transmit data according to a wireless communication standard. The accessory may include a second coil configured to inductively receive power. The accessory may further include second power management circuitry configured to control the second coil to receive the power transmitted through the first coil according to the wireless charging standard, and to control the second coil to receive the data transmitted through the first coil according to the wireless communication standard.
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公开(公告)号：US20220115916A1
公开(公告)日：2022-04-14
申请号：US17274548
申请日：2020-02-12
Applicant: Google LLC
Inventor： Liang Jia , Srenik Suresh Mehta
Abstract: This document describes a passive adapter for wireless charging of an electronic device and associated methods and systems. The described passive adapter includes two coils connected by a capacitor and separated by a core material that prevents mutual coupling between the coils. These two coils may have differing sizes, such that one coil can size-match to a transmitter coil of an existing wireless charger and the second coil can size-match to a smaller (or larger) receiver coil in a wireless-power receiver to charge a battery of the wireless-power receiver. In aspects, these two coils may be separated by a distance that enables the passive adapter to act as a passive repeater by bridging a space between the transmitter coil and the receiver coil.
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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：US20210194282A1
公开(公告)日：2021-06-24
申请号：US17128326
申请日：2020-12-21
Applicant: Google LLC
Inventor： Liang Jia
Abstract: Devices for wireless charging with metal housings. The device comprises a wireless power receiving coil and an associated coil core, wherein the coil core defines a recess and at least a portion of the wireless power receiving coil is disposed in the recess; and a housing comprising one or more metal portions, wherein the housing is configured to receive at least a portion of the wireless power receiving coil and the associated coil core in an opening defined by the one or more metal portions. Alternatively, the device comprises a wireless power receiving coil and an associated coil core; a housing comprising one or more metal portions; and an alignment feature configured to interact with a magnet of a wireless charger to align the device with the wireless charger, wherein the alignment feature comprises a plurality of metal elements that are electrically insulated from each other.
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