Patents by Inventor Bing Cai

Bing Cai 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).

  • Patent number: 12368328
    Abstract: A transmit end for multi-device wireless charging includes N half-bridge inverter circuits, a multi-coil gating matrix, and a multi-coil module. Input terminals of the N half-bridge inverter circuits are connected to corresponding direct currents, and output terminals of the N half-bridge inverter circuits are connected to input terminals of the multi-coil gating matrix. The multi-coil gating matrix includes a plurality of switches configured to respectively connect the output terminals of the N half-bridge inverter circuits to corresponding transmit coils in the multi-coil module.
    Type: Grant
    Filed: March 30, 2023
    Date of Patent: July 22, 2025
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Yuechao Li, Bing Cai
  • Patent number: 11870272
    Abstract: A wireless charging receiving apparatus of a mobile terminal. The wireless charging receiving apparatus is configured to be disposed inside the mobile terminal and close to a metal rear housing of the mobile terminal, and includes two interconnected coils. The two coils are located in a same plane and are connected in series, and winding directions of the two coils are opposite, so that directions of magnetic fluxes generated by the two coils on the metal rear housing are opposite, thereby resolving a problem of an eddy current on the metal rear housing of the mobile terminal such as a smartphone including a wireless charging system, and reducing a temperature of a metal body and reducing an energy loss without forming a hole or a seam on the metal rear housing.
    Type: Grant
    Filed: April 22, 2022
    Date of Patent: January 9, 2024
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Songnan Yang, Xiaoqing Hu, Bing Cai
  • Publication number: 20230246486
    Abstract: A transmit end for multi-device wireless charging includes N half-bridge inverter circuits, a multi-coil gating matrix, and a multi-coil module. Input terminals of the N half-bridge inverter circuits are connected to corresponding direct currents, and output terminals of the N half-bridge inverter circuits are connected to input terminals of the multi-coil gating matrix. The multi-coil gating matrix includes a plurality of switches configured to respectively connect the output terminals of the N half-bridge inverter circuits to corresponding transmit coils in the multi-coil module.
    Type: Application
    Filed: March 30, 2023
    Publication date: August 3, 2023
    Applicant: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Yuechao Li, Bing Cai
  • Patent number: 11637442
    Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: April 25, 2023
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Baoshan Wu, Yunpeng Yang, Chengliang Zhang, Bing Cai, Donghao Wu
  • Patent number: 11557445
    Abstract: A keyboard device includes a bottom cover, a supporting plate, a flexible circuit board and plural key structures. The supporting plate is installed on the bottom cover. The supporting plate has a curved arc-shaped profile that is bent upwardly in a direction away from the bottom cover. The supporting plate includes plural perforations. The flexible circuit board is arranged between the bottom cover and the supporting plate. The plural key structures are installed on the supporting plate. The plural key structures are penetrated through the corresponding perforations and contacted with the flexible circuit board.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: January 17, 2023
    Assignee: Primax Electronics Ltd.
    Inventors: Liu-Bing Cai, Rui-Qing Xiao, Xiao-Ping Wang, Jin-Chun Zhang
  • Patent number: 11482387
    Abstract: A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: October 25, 2022
    Assignee: PRIMAX ELECTRONICS LTD.
    Inventors: Liu-Bing Cai, Li-Xiong Deng, Fu-Zhou Wei, Li-Qiang Chen, Xiao-Ping Wang
  • Publication number: 20220247214
    Abstract: A wireless charging receiving apparatus of a mobile terminal. The wireless charging receiving apparatus is configured to be disposed inside the mobile terminal and close to a metal rear housing of the mobile terminal, and includes two interconnected coils. The two coils are located in a same plane and are connected in series, and winding directions of the two coils are opposite, so that directions of magnetic fluxes generated by the two coils on the metal rear housing are opposite, thereby resolving a problem of an eddy current on the metal rear housing of the mobile terminal such as a smartphone including a wireless charging system, and reducing a temperature of a metal body and reducing an energy loss without forming a hole or a seam on the metal rear housing.
    Type: Application
    Filed: April 22, 2022
    Publication date: August 4, 2022
    Inventors: Songnan YANG, Xiaoqing HU, Bing CAI
  • Publication number: 20220209583
    Abstract: A remote wireless charging transmit end is configured to wirelessly charge a receive end. The transmit end includes a transmit end processor, a fundamental frequency-radio frequency conversion unit, and a transmit end antenna. The transmit end processor is configured to generate a composite signal based on a control signal and a power signal, and send the composite signal to the fundamental frequency-radio frequency conversion unit. The control signal is used to control a working status of the receive end, and the power signal is used to charge the receive end. The fundamental frequency-radio frequency conversion unit is configured to convert the composite signal into a radio frequency signal, and send the radio frequency signal to the transmit end antenna. The transmit end antenna is configured to transmit the radio frequency signal corresponding to the composite signal.
    Type: Application
    Filed: March 14, 2022
    Publication date: June 30, 2022
    Inventors: Ning PAN, Zhixia DU, Bing CAI
  • Patent number: 11355964
    Abstract: A wireless charging receiving apparatus of a mobile terminal. The wireless charging receiving apparatus is configured to be disposed inside the mobile terminal and close to a metal rear housing (3) of the mobile terminal, and includes two interconnected coils (701,702). The two coils (701,702) are located in a same plane and are connected in series, and winding directions of the two coils (701,702) are opposite, so that directions of magnetic fluxes generated by the two coils (701,702) on the metal rear housing (3) are opposite, thereby resolving a problem of an eddy current on the metal rear housing of the mobile terminal such as a smartphone including a wireless charging system, and reducing a temperature of a metal body and reducing an energy loss without forming a hole or a seam on the metal rear housing.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: June 7, 2022
    Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
    Inventors: Songnan Yang, Xiaoqing Hu, Bing Cai
  • Publication number: 20220165520
    Abstract: A keyboard device includes a bottom cover, a supporting plate, a flexible circuit board and plural key structures. The supporting plate is installed on the bottom cover. The supporting plate has a curved arc-shaped profile that is bent upwardly in a direction away from the bottom cover. The supporting plate includes plural perforations. The flexible circuit board is arranged between the bottom cover and the supporting plate. The plural key structures are installed on the supporting plate. The plural key structures are penetrated through the corresponding perforations and contacted with the flexible circuit board.
    Type: Application
    Filed: December 29, 2020
    Publication date: May 26, 2022
    Inventors: Liu-Bing Cai, Rui-Qing Xiao, Xiao-Ping Wang, Jin-Chun Zhang
  • Publication number: 20220085642
    Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.
    Type: Application
    Filed: November 24, 2021
    Publication date: March 17, 2022
    Inventors: Baoshan WU, Yunpeng YANG, Chengliang ZHANG, Bing CAI, Donghao WU
  • Publication number: 20220068575
    Abstract: A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 3, 2022
    Inventors: Liu-Bing Cai, Li-Xiong Deng, Fu-Zhou Wei, Li-Qiang Chen, Xiao-Ping Wang
  • Publication number: 20220015709
    Abstract: A keyboard device having functionality of physiological parameter measurement is disclosed, which comprises a keyboard main body and at least two physiological signal sensing units. The physiological signal sensing unit comprises a lighting element and a light sensing element. Moreover, the physiological signal sensing unit further comprises a touch plane that is exposed out of the surface of the keyboard main body. When a user is typing the button keys of the keyboard main body, the user can touch the touch plane by one finger thereof, such that the physiological parameter calculating unit receives an optical signal through the physiological signal sensing unit, thereby calculating physiological parameters of the user after applying a physiological parameter calculating process to the optical signal. The calculated physiological parameter comprises heartbeat and heart rate.
    Type: Application
    Filed: August 26, 2020
    Publication date: January 20, 2022
    Inventors: Ling-Bo Li, Xiao-Ping Wang, Liu-Bing Cai
  • Patent number: 11204651
    Abstract: A keyboard device includes a membrane circuit board and a key structure over the membrane circuit board. The key structure includes a keycap, a plunger structure, a key pedestal and an elastic element. The plunger structure is arranged between the keycap and the elastic element. At least a portion of the keycap is disposed within a pedestal dust-storage chamber of the key pedestal. At least a portion of the plunger structure is disposed within a guiding chamber of the key pedestal. Due to the relative location between the keycap, the plunger structure and the key pedestal, the path of the dust to enter the guiding chamber is extended or blocked. Consequently, the dust-proof efficacy is enhanced.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: December 21, 2021
    Assignee: PRIMAX ELECTRONICS LTD.
    Inventors: Liu-Bing Cai, Li-Qiang Chen
  • Patent number: 11094479
    Abstract: A key structure includes a keycap, a pedestal and an elastic element. The keycap includes a main body and a coupling shaft. The pedestal includes a key slot. The key slot has an upper part and a lower part. The coupling shaft is penetrated through the upper part of the key slot and movable within the key slot upwardly or downwardly. The elastic element is installed in the lower part of the key slot. After an external force applied to the keycap is released, the elastic element is elastically restored, so that the keycap is returned to an original position. At the same time, the buffering elements in the key slot interfere with the coupling shaft. Consequently, an ascending speed of the keycap is reduced, and a click sound generated from the collision between keycap and the pedestal is reduced.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: August 17, 2021
    Assignee: PRIMAX ELECTRONICS LTD.
    Inventors: Xiao-Jun Chu, Li-Qiang Chen, Liu-Bing Cai, Sheng-An Tsai, Chun-Che Wu
  • Publication number: 20210181861
    Abstract: A keyboard device includes a membrane circuit board and a key structure over the membrane circuit board. The key structure includes a keycap, a plunger structure, a key pedestal and an elastic element. The plunger structure is arranged between the keycap and the elastic element. At least a portion of the keycap is disposed within a pedestal dust-storage chamber of the key pedestal. At least a portion of the plunger structure is disposed within a guiding chamber of the key pedestal. Due to the relative location between the keycap, the plunger structure and the key pedestal, the path of the dust to enter the guiding chamber is extended or blocked. Consequently, the dust-proof efficacy is enhanced.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 17, 2021
    Inventors: Liu-Bing Cai, Li-Qiang Chen
  • Patent number: 10903028
    Abstract: A rotary switch structure includes a sleeve, a seat body, an elastic ring, plural push elements and a fixing element. The seat body is accommodated within the sleeve. The elastic ring is disposed on the seat body. The plural push elements are disposed on the elastic ring, and provide a pushing force to the elastic ring. The fixing element is fixed in the sleeve and contacted with the plural push elements. The plural push elements are fixed on the elastic ring by the fixing element. The elastic ring absorbs the pushing force, so that a friction force between the at least one push element and the elastic ring is adjustable. Consequently, the rotating feel of the rotary switch structure is adjustable according to the practical requirements.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: January 26, 2021
    Assignee: PRIMAX ELECTRONICS LTD.
    Inventors: Liu-Bing Cai, Li-Xiong Deng, Li-Qiang Chen
  • Publication number: 20200312589
    Abstract: A rotary switch structure includes a sleeve, a seat body, an elastic ring, plural push elements and a fixing element. The seat body is accommodated within the sleeve. The elastic ring is disposed on the seat body. The plural push elements are disposed on the elastic ring, and provide a pushing force to the elastic ring. The fixing element is fixed in the sleeve and contacted with the plural push elements. The plural push elements are fixed on the elastic ring by the fixing element. The elastic ring absorbs the pushing force, so that a friction force between the at least one push element and the elastic ring is adjustable. Consequently, the rotating feel of the rotary switch structure is adjustable according to the practical requirements.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 1, 2020
    Inventors: Liu-Bing Cai, Li-Xiong Deng, Li-Qiang Chen
  • Patent number: 10790760
    Abstract: A dual voltage power system for selectively providing direct current (DC) at two different voltages. The system includes a plurality of universal rectifiers each of which may be configured to operate under a plurality of operating modes using a plurality of switches which may be controlled by a power shelf controller.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: September 29, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Pedro Angel Fernandez, Bing Cai, Yuyu Qiao
  • Patent number: 10691169
    Abstract: A cover for an electronic device and methods of forming a cover is disclosed. The electronic device may include a housing, and a cover coupled to the housing. The cover may have an inner surface having at least one of an intermediate polish and a final polish, a groove formed on the inner surface, and an outer surface positioned opposite the inner surface. The outer surface may have at least one of the intermediate polish and the final polish. The cover may also have a rounded perimeter portion formed between the inner surface and the outer surface. The rounded perimeter portion may be positioned adjacent the groove. The method for forming the cover may include performing a first polishing process on the sapphire component using a polishing tool, and performing a second polishing process on the groove of the sapphire component forming the cover using blasting media.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 23, 2020
    Assignee: APPLE INC.
    Inventors: Jeffrey C. Mylvaganam, Erik G. de Jong, Dale N. Memering, Xiao Bing Cai, Palaniappan Chinnakaruppan, Jong Kong Lee, Srikanth Kamireddi, Sawako Kamei, Feng Min, Jing Zhang, Xiang Du, Sai Feng Liu