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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：US20230221813A1
公开(公告)日：2023-07-13
申请号：US18002192
申请日：2020-08-31
Applicant: Google LLC
Inventor： Liang Jia , Srikanth Lakshmikanthan , Liyu Yang
IPC: G06F3/0354 , H02J50/00 , H02J50/90 , H02J7/00
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：US20220029530A1
公开(公告)日：2022-01-27
申请号：US17296882
申请日：2020-03-26
Applicant: Google LLC
Inventor： Yiming Li , Shuo Wang , Honggang Sheng , Douglas Osterhout , Srikanth Lakshmikanthan
Abstract: An example power adapter includes a rectifier configured to convert an input alternating current (AC) power signal on an AC bus into an input direct current (DC) power signal on an input DC bus; a split differential mode (DM) choke connected to the input DC bus, wherein the split DM choke comprises a first DM choke on a high side of the input DC bus and a second DM choke on a low side of the input DC bus; and a switched mode power converter configured to output, using the input DC power signal, an output DC power signal on an output DC bus.
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公开(公告)号：US20210366647A1
公开(公告)日：2021-11-25
申请号：US16978924
申请日：2019-08-05
Applicant: Google LLC
Inventor： Chao Fei , Honggang Sheng , Douglas Osterhout , Liang Jia , Srikanth Lakshmikanthan
Abstract: Shielded electrical transformers and power converters using those transformers are disclosed. In some implementations, a shielded electrical transformer includes a magnetic core, a primary winding, a first secondary winding, and a second secondary winding. The transformer includes a first shielding winding that has a same voltage potential direction as the primary winding and is connected in series with the primary winding to carry current that passes through the primary winding. The transformer also includes a second shielding winding that has a voltage potential direction opposite the primary winding and is connected from primary ground to a floating terminal. The first secondary winding, the second secondary winding, the first shielding winding, and the second shielding winding can each have an approximately equal number of turns.
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Patent Agency Ranking
公开(公告)号：US10945213B2
公开(公告)日：2021-03-09
申请号：US16351639
申请日：2019-03-13
Applicant: Google LLC
Inventor： Enrique Romero Pintado , Liang Jia , Srikanth Lakshmikanthan , Eklavya Singh
IPC: H04W52/02 , H02J7/00 , G01R31/389 , G01R31/36
Abstract: Methods, systems, and devices, including machine-readable media, for dynamic battery power management are disclosed. In some implementations, an electronic device that is powered by a battery senses a voltage provided by the battery and an electric current provided by the battery. The electronic device determines a present state of the battery. The electronic device determines a current limit for the electronic device based on the sensed voltage and electric current and the determined present state of the battery. The electronic device manages power use of the electronic device to maintain electric current draw from the battery at or below the electric current limit.
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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：US20200220368A1
公开(公告)日：2020-07-09
申请号：US16242517
申请日：2019-01-08
Applicant: Google LLC
Inventor： Chao Fei , Honggang Sheng , Douglas Osterhout , Srikanth Lakshmikanthan
Abstract: An adapter can include a voltage doubler rectifier, a first stage converter, and a second stage converter. The voltage doubler rectifier can have a switch and can be configured to rectify a received voltage in response to the switch being in a first position, and to rectify and effectively double the received voltage in response to the switch being in a second position. The first stage converter can be coupled to the voltage doubler rectifier and can be a first type of converter. The first type of converter can be either an isolated converter or a non-isolated converter. The second stage converter can be coupled to the first stage converter and can be a second type of converter. The second type of converter can be either the isolated converter or the non-isolated converter. The second type of converter can be different from the first type of converter.
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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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公开(公告)号：US10237830B1
公开(公告)日：2019-03-19
申请号：US15692546
申请日：2017-08-31
Applicant: Google LLC
Inventor： Liang Jia , Srikanth Lakshmikanthan , Eklavya Singh , Enrique Romero Pintado
Abstract: Methods, systems, and devices, including machine-readable media, for dynamic battery power management are disclosed. In some implementations, an electronic device that is powered by a battery senses a voltage provided by the battery and an electric current provided by the battery. The electronic device determines a present state of the battery. The electronic device determines a current limit for the electronic device based on the sensed voltage and electric current and the determined present state of the battery. The electronic device manages power use of the electronic device to maintain electric current draw from the battery at or below the electric current limit.
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