Patents by Inventor Fai-To Leung

Fai-To Leung 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).

  • Publication number: 20240065596
    Abstract: A method and system for detecting short-term stress of a subject person and generating alerts in an indoor environment are disclosed. The system may receive data on the subject person's heart rate, galvanic skin response, and accelerometer movement from a wearable device, and also capture image frames through a camera. After that, the system may perform bio-signal analysis in accordance with the heart rate and the galvanic skin response data, and perform skeletal motion analysis in accordance with the image frames. Based on bio-signal index and skin conductance index generated from the bin-signal analysis and skeletal motion analysis respectively, the system may perform data fusion to determine the short-term stress.
    Type: Application
    Filed: August 31, 2022
    Publication date: February 29, 2024
    Inventors: Chun Kit HUNG, Fu Tuen LEUNG, Ka Fai SUK, Kar-Wing Edward LOR
  • Publication number: 20230198305
    Abstract: A capacitive power transfer system can include a power transmitter having one or more primary side filter components, a communications modulator, and transmitter capacitive couplers; and a power receiver having receiver capacitive couplers capacitively coupled to the transmitter capacitive couplers, one or more secondary side filter components, and a communication demodulator. The one or more primary side filter components and the one or more secondary side filter components can be selected to provide power amplifier operation at a power delivery frequency and act as a stable gain high pass filter above a communications cutoff frequency that is higher than the power delivery frequency.
    Type: Application
    Filed: August 15, 2022
    Publication date: June 22, 2023
    Inventors: Zonghong Hu, Saining Ren, Shaoge Zang, Ho Fai Leung, Aiguo Hu, Qi Zhu, Botunga Arachchige Rajith Chaminda Abeywardana, Lei Zhao
  • Patent number: 11362548
    Abstract: A wireless power system has a wireless power transmitting device such as a charging puck and a wireless power receiving device such as a wristwatch. The charging puck may have a three-wire cable that is coupled between a connector and a puck housing. The wireless power transmitting device may have a set of four coils or other number of wireless power transmitting coils in the puck housing. A switch may be coupled in series with each of the four coils. Control circuitry in the wireless power transmitting device may activate a subset of the switches to switch a subset of the coils into use in transmitting the wireless power to the wireless power receiving device. The control circuitry may have a main portion in the connector that uses a tone-based encoding scheme or other encoding scheme to transmit switch configuration commands to a secondary portion in the puck housing.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: June 14, 2022
    Assignee: Apple Inc.
    Inventors: Saining Ren, Ho Fai Leung, Liang Chen
  • Patent number: 11251656
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat with one or more coils or may be a wireless charging puck with one or more coils. In some embodiments, the wireless charging puck may have six coils or other number of coils arranged in a ring. The wireless power receiving device may have an elongated magnetic core such as a C-shaped core with pillars at opposing ends. First and second coils may be formed on the pillars and a third coil may be formed between the first and second coils. The coils of the wireless power receiving device such as the first and second coils on the magnetic core may be configured to receive magnetic flux emitted by a pair of the six coils in the wireless charging puck.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: February 15, 2022
    Assignee: Apple Inc.
    Inventors: Saining Ren, Ho Fai Leung, Liang Chen
  • Patent number: 11171518
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: November 9, 2021
    Assignee: Apple Inc.
    Inventors: Saining Ren, Ho Fai Leung
  • Publication number: 20210184502
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.
    Type: Application
    Filed: February 15, 2021
    Publication date: June 17, 2021
    Inventors: Saining Ren, Ho Fai Leung
  • Patent number: 10978918
    Abstract: A wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to a wireless power receiving device. The wireless power transmitting coil is located in a housing. The housing has a circular outline and contains one or more magnets that couple to corresponding magnets in the wireless power receiving device to help align a wireless power receiving coil in the wireless power receiving device to the wireless power transmitting coil in the wireless power transmitting device. A circular array of capacitive sensor electrodes is supported by the housing at a location that overlaps the wireless power transmitting coil. Capacitive sensor measurements from the capacitive sensor array are analyzed to determine whether a foreign object such as a coin or paperclip is present between the housing and the wireless power receiving device.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: April 13, 2021
    Assignee: Apple Inc.
    Inventors: Saining Ren, Patrin Illenberger, Ho Fai Leung
  • Patent number: 10923959
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: February 16, 2021
    Assignee: Apple Inc.
    Inventors: Saining Ren, Ho Fai Leung
  • Publication number: 20200321807
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat with one or more coils or may be a wireless charging puck with one or more coils. In some embodiments, the wireless charging puck may have six coils or other number of coils arranged in a ring. The wireless power receiving device may have an elongated magnetic core such as a C-shaped core with pillars at opposing ends. First and second coils may be formed on the pillars and a third coil may be formed between the first and second coils. The coils of the wireless power receiving device such as the first and second coils on the magnetic core may be configured to receive magnetic flux emitted by a pair of the six coils in the wireless charging puck.
    Type: Application
    Filed: July 3, 2019
    Publication date: October 8, 2020
    Inventors: Saining Ren, Ho Fai Leung, Liang Chen
  • Publication number: 20200321809
    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 8, 2020
    Inventors: Saining Ren, Ho Fai Leung
  • Patent number: 10487212
    Abstract: A method to coat oxide-based color pigments with an ultrasound-assisted coating of nanofiber or other nanostructures in order to enhance heat-fastness and color performance to said color pigments is presented. In particular, the present invention provides a method to coat oxide-based color pigments with nano-coating materials, including but not limited to, alumina and/or silica at different dosage levels, with nanospike, nanoneedle, nanoplate, and/or nanoflower morphology towards enhancing the heat-fastness and color performance of said color pigments.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: November 26, 2019
    Assignee: Hong Kong Baptist University
    Inventors: Cham Fai Leung, Chung Yan Yick
  • Publication number: 20180223105
    Abstract: A method to coat oxide-based color pigments with an ultrasound-assisted coating of nanofiber or other nanostructures in order to enhance heat-fastness and color performance to said color pigments is presented. In particular, the present invention provides a method to coat oxide-based color pigments with nano-coating materials, including but not limited to, alumina and/or silica at different dosage levels, with nanospike, nanoneedle, nanoplate, and/or nanoflower morphology towards enhancing the heat-fastness and color performance of said color pigments.
    Type: Application
    Filed: November 15, 2017
    Publication date: August 9, 2018
    Inventors: Cham Fai LEUNG, Chung Yan YICK
  • Publication number: 20170235357
    Abstract: Embodiments of the present invention are directed towards a method and apparatus for managing power consumption of a client computer, comprising receiving, by a host computer from the client computer, a battery power management object (BPMO) related to a remote computing session, the host computer communicatively coupled to the client computer by the remote computing session and adjusting, by the host computer based on the battery power management object, at least one of i) at least one parameter associated with the remote computing session or ii) a source definition for the remote computing session.
    Type: Application
    Filed: December 16, 2014
    Publication date: August 17, 2017
    Inventor: Alfred Hoi-Fai Leung
  • Patent number: 9423451
    Abstract: Embodiments include a testing arrangement for testing a first package, the testing arrangement comprising a frame having a top section and a bottom section, wherein the bottom section of the frame comprises a pickup section, and wherein the pickup section has a first air pathway; a second package mounted on a top surface of the bottom section of the frame such that a second air pathway is defined between (i) the second package and (ii) the top surface of the bottom section of the frame; and a vacuum path defined by (i) the first air pathway and (ii) the second air pathway, wherein during testing of the first package, a vacuum in the vacuum path is generated such that the pickup section of the bottom section of the frame holds the first package.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: August 23, 2016
    Assignee: Marvell World Trade Ltd.
    Inventor: Yat Fai Leung
  • Patent number: 9391493
    Abstract: An electric machine includes a stator having a first end and a second end and an end frame including a first cup portion arranged to at least partially contain a portion of the stator. The end frame is positioned adjacent the first end of the stator. A potting cup includes a second cup portion arranged to at least partially contain a portion of the stator. The potting cup is positioned adjacent the second end of the stator. A potting member is coupled to the stator, the end frame, and the potting cup to permanently bond the end frame, the potting cup, and the stator to one another.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: July 12, 2016
    Assignee: Regal Beloit America, Inc.
    Inventors: Ngan Fai Leung, Stephen Thomas English, Matthew William Critchley, Janice Fitzgerald, Frank Edward Staigl, III, Joseph Henry, Barbara Mary Shanks, John R. Belko
  • Patent number: 9306239
    Abstract: The present invention is directed to a starch-based battery system. The starch-based battery system uses a rheological and replaceable starch gluten electrolyte that generates colloidal starch gel adhesive contacted with and/or attached on electrodes to generate current for powering electronic devices. The starch-based battery system that includes control circuit and standard cap module replaces a conventional dry cell battery or is integrated with electronic devices to power, for example, flash-light, lighting ornaments or magnetic actuated motion products and toys. In other embodiments of the invention, the starch-based battery system is integrated into a device for attracting aquatic life forms in an aquatic environment, wherein the starch-based battery powers a light source and/or sound source and also the starch gluten electrolyte acts as bait for attracting aquatic life forms within the aquatic environment.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: April 5, 2016
    Assignee: G. CONCEPT TECHNOLOGY LTD.
    Inventors: Wing Fai Leung, Po Fong Cheng
  • Patent number: 9182440
    Abstract: Some of the embodiments of the present disclosure provide a method for operating a testing system to test a device, wherein the testing system comprises a pressing module, the method comprising attaching the device to the pressing module of the testing system; while the testing system operates in a first mode of testing, pressing the pressing module to a first position such that (i) the device is electrically coupled to a first component via a first pin, and (ii) the device is electrically isolated from a second component via a second pin; and while the testing system operates in a second mode of testing, pressing the pressing module to a second position such that (i) the device is electrically isolated from first component via the first pin, and (ii) the device is electrically coupled to the second component via the second pin.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: November 10, 2015
    Assignee: Marvell International Ltd.
    Inventor: Yat Fai Leung
  • Publication number: 20150155593
    Abstract: The present invention is directed to a starch-based battery system. The starch-based battery system uses a rheological and replaceable starch gluten electrolyte that generates colloidal starch gel adhesive contacted with and/or attached on electrodes to generate current for powering electronic devices. The starch-based battery system that includes control circuit and standard cap module replaces a conventional dry cell battery or is integrated with electronic devices to power, for example, flash-light, lighting ornaments or magnetic actuated motion products and toys. In other embodiments of the invention, the starch-based battery system is integrated into a device for attracting aquatic life forms in an aquatic environment, wherein the starch-based battery powers a light source and/or sound source and also the starch gluten electrolyte acts as bait for attracting aquatic life forms within the aquatic environment.
    Type: Application
    Filed: January 30, 2015
    Publication date: June 4, 2015
    Applicant: G. CONCEPT TECHNOLOGY LTD.
    Inventors: Wing Fai Leung, Po Fong Cheng
  • Patent number: 8974973
    Abstract: The present invention is directed to a starch-based battery system. The starch-based battery system uses a rheological and replaceable starch gluten electrolyte that generates colloidal starch gel adhesive contacted with and/or attached on electrodes to generate current for powering electronic devices. The starch-based battery system that includes control circuit and standard cap module replaces a conventional dry cell battery or is integrated with electronic devices to power, for example, flash-light, lighting ornaments or magnetic actuated motion products and toys. In other embodiments of the invention, the starch-based battery system is integrated into a device for attracting aquatic life forms in an aquatic environment, wherein the starch-based battery powers a light source and/or sound source and also the starch gluten electrolyte acts as bait for attracting aquatic life forms within the aquatic environment.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: March 10, 2015
    Inventors: Wing Fai Leung, Po Fong Cheng
  • Publication number: 20140354324
    Abstract: Embodiments include a testing arrangement for testing a first package, the testing arrangement comprising a frame having a top section and a bottom section, wherein the bottom section of the frame comprises a pickup section, and wherein the pickup section has a first air pathway; a second package mounted on a top surface of the bottom section of the frame such that a second air pathway is defined between (i) the second package and (ii) the top surface of the bottom section of the frame; and a vacuum path defined by (i) the first air pathway and (ii) the second air pathway, wherein during testing of the first package, a vacuum in the vacuum path is generated such that the pickup section of the bottom section of the frame holds the first package.
    Type: Application
    Filed: May 21, 2014
    Publication date: December 4, 2014
    Applicant: Marvell World Trade Ltd.
    Inventor: Yat Fai Leung