Patents by Inventor Lijie Zhao

Lijie Zhao 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: 10579916
    Abstract: In accordance with aspects of the present invention, a magnetic secured transmission system is presented. A magnetic secure transmission (MST) system can include a full-bridge driver that includes four transistors configured to regulate current through a coil; and a driving controller coupled to drive the full-bridge driver at a high frequency. In some embodiments, the transistors in the full bridge regulator are driven with a high frequency pulsed-wave modulated (PWM) signal to control the current through the coil. A method of magnetic secured transmission (MST) of MST data according to some embodiments includes receiving the MST data; generating coil data in response to the MST data; driving transistors in a full bridge at a high frequency to drive current through a coil according to the coil data.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: March 3, 2020
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Tao Qi, Lijie Zhao
  • Patent number: 10565684
    Abstract: A super-resolution method, a super-resolution system, a user equipment and a server. The super-resolution method includes: training an image sample at a server; obtaining a server-side image database; updating a local image database in a user device by using the server-side image database; and displaying an input low-resolution image as a high-resolution image.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: February 18, 2020
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Lijie Zhang, Jianmin He, Pablo Navarrete Michelini, Xingxing Zhao
  • Publication number: 20200044486
    Abstract: In accordance with aspects of the present invention, a method and apparatus for demodulating an amplitude-modulated wireless power signal is presented. A method of receiving an amplitude modulated component of a wireless power transmission signal according to some embodiments includes receiving an input signal, wherein the input signal is based on an amplitude modulated wireless power signal; and applying an offset to the input signal to receive the amplitude modulated component. A demodulator according to some embodiments can include a first voltage-to-current converter that receives an input signal related to an amplitude modulated wireless power signal; a second voltage-to-current converter that receives an offset signal; and a summing node that adjusts a first current produced by the first voltage-to-current converter by a second current produced by the second voltage-to-current converter to produce an output signal.
    Type: Application
    Filed: August 1, 2018
    Publication date: February 6, 2020
    Inventors: Yue WANG, Lijie ZHAO
  • Patent number: 10554061
    Abstract: A charging system that includes a switching control circuit coupled to four series-coupled MOSFET transistors; a flying capacitor coupled across two of the four series-coupled MOSFET transistors; and node between the two of the four series coupled transistors that couples to an output inductor to form a buck regulator is presented. Embodiments of the charging system can have increased efficiency, can reduce the size and inductance of the output inductor, and can be produced with a low voltage process.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: February 4, 2020
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Gustavo James Mehas, Lijie Zhao, Tae Kwang Park, Zhitong Guo
  • Patent number: 10523107
    Abstract: A method for controlling a voltage regulator is receiving a voltage identification code which has a pulse width modulation signal, providing a duty signal via measuring a duty cycle of the pulse width modulation signal, calculating a target voltage based on the duty signal, providing a reference signal based on the duty signal and the target voltage. If it is judged that the duty cycle of the pulse width modulation signal increases, the reference signal is restricted increasing or keeping its value without decreasing, and if it is judged that the duty cycle of the pulse width modulation signal decreases, the reference signal is restricted decreasing or keeping its value without increasing.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: December 31, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Binci Xu, Lijie Jiang, Chao Liu, Tao Zhao
  • Patent number: 10513004
    Abstract: A wheel corner polishing device includes a station switching system, a valve hole polishing system, a bolt hole polishing system and a rim and cap section synchronous polishing system. The wheel corner polishing device can automatically polish four positions including bolt hole corners, a valve hole corner, outer rim corners and cap section corners of a wheel via upper and lower stations and coordination of the systems.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: December 24, 2019
    Assignee: CITIC Dicastal CO., LTD.
    Inventors: Huiying Liu, Lijie Hu, Xiaopeng Chen, Zenglei He, Yongwang Zhao
  • Publication number: 20190341843
    Abstract: A voltage regulator provides an output voltage and an output current. The output voltage decreases with an increase of the output current when the output current is lower than a current breaking point, and the output voltage is maintained when the output current reaches the current breaking point.
    Type: Application
    Filed: April 19, 2019
    Publication date: November 7, 2019
    Inventors: Binci Xu, Yongliang Wang, Tao Zhao, Lijie Jiang
  • Publication number: 20190332909
    Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
    Type: Application
    Filed: July 12, 2019
    Publication date: October 31, 2019
    Inventors: Rui LIU, Tao QI, Lijie ZHAO, Gustavo James MEHAS, Tae Kwang PARK, Zhitong GUO, Siqiang FAN
  • Publication number: 20190325280
    Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 24, 2019
    Inventors: Rui LIU, Tao QI, Lijie ZHAO, Gustavo James MEHAS, Tae Kwang PARK, Zhitong GUO, Siqiang FAN
  • Publication number: 20190279217
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for payment services are provided.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Chao LI, Hua ZHAO, Chunjie DONG, Hong JIN, Lijie ZHANG
  • Patent number: 10404153
    Abstract: A method for controlling a voltage regulator is receiving a voltage identification code which has a pulse width modulation signal, providing a duty signal via measuring a duty cycle of the pulse width modulation signal, calculating a target voltage based on the duty signal, providing a reference signal via filtering the duty signal by a first filter if the voltage identification code varies, and providing the reference signal via filtering the duty signal by a second filter if the reference signal is in a range determined by the target voltage.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: September 3, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Binci Xu, Lijie Jiang, Chao Liu, Tao Zhao
  • Patent number: 10360485
    Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: July 23, 2019
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Tao Qi, Lijie Zhao, Gustavo James Mehas, Tae Kwang Park, Zhitong Guo, Siqiang Fan
  • Patent number: 10340786
    Abstract: A rectifier circuit can include a plurality of FETs arranged as a rectifier; and a start-up circuit applied to each of the plurality of FETs that turn each of the FETs off during a circuit startup period, wherein the start-up circuit provides a large impedance for low power dissipation during normal operation of the rectifier.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: July 2, 2019
    Assignee: Integrated Device Technology, Inc.
    Inventors: Lijie Zhao, Yue Wang, Stephen Ulbrich
  • Publication number: 20190193241
    Abstract: A wheel shape follow-up burr brushing device is composed of lower guide posts, lower cylinders, a first lifting table, a first servo motor, a lower rotating table, back cavity brush adjustment cylinders, I-shaped sliding blocks, a concave block, front brush adjustment cylinders and the like. The heights of brushes are adjusted, so that the contour formed by six brushes can be consistent with the back cavity of a wheel in shape, and the brushes follow up the shape of the back cavity of the wheel; the inclination angle of the brush and the depth of the brush entering the groove can be adjusted, so that the brush follows up the shape of a spoke root groove; and the heights of the brushes can be adjusted to match the shape of the front of the wheel, so that the brushes follow up the shape of the front of the wheel.
    Type: Application
    Filed: February 26, 2018
    Publication date: June 27, 2019
    Inventors: Huiying Liu, Yongwang Zhao, Lijie Hu
  • Patent number: 10333265
    Abstract: The present invention provides a spectral beam combined laser system comprising an optical gain element array, a transform element, a diffraction element and a reflecting element, which are sequentially positioned in an optical path, wherein said optical gain element array comprises a plurality of gain elements radiate laser beams having different wavelength; said transform element focuses and spatially overlaps the laser beams received from said optical gain element array at said diffraction element; said diffraction element diffracts the laser beams spatially overlapped by the transform element to the reflecting element; and said reflecting element feeds back a portion of the laser beams to the optical gain element array in a V-shaped off-axis external cavity with off-axis angle, wherein said V-shaped off-axis external cavity is formed between the reflecting element and the optical gain element array.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: June 25, 2019
    Assignee: CHANGCHUN INSTITUTE OF OPTICS, FINE MECHANICS AND PHYSICS, CHINESE ACADEMY OF SCIENCES
    Inventors: Cunzhu Tong, Fangyuan Sun, Yufei Zhao, Shili Shu, Lijie Wang, Guanyu Hou, Sicong Tian, Lijun Wang
  • Publication number: 20190157830
    Abstract: The present invention provides a spectral beam combined laser system comprising an optical gain element array, a transform element, a diffraction element and a reflecting element, which are sequentially positioned in an optical path, wherein said optical gain element array comprises a plurality of gain elements radiate laser beams having different wavelength; said transform element focuses and spatially overlaps the laser beams received from said optical gain element array at said diffraction element; said diffraction element diffracts the laser beams spatially overlapped by the transform element to the reflecting element; and said reflecting element feeds back a portion of the laser beams to the optical gain element array in a V-shaped off-axis external cavity with off-axis angle, wherein said V-shaped off-axis external cavity is formed between the reflecting element and the optical gain element array.
    Type: Application
    Filed: July 30, 2018
    Publication date: May 23, 2019
    Inventors: Cunzhu Tong, Fangyuan Sun, Yufei Zhao, Shili Shu, Lijie Wang, Guanyu Hou, Sicong Tian, Lijun Wang
  • Publication number: 20190137554
    Abstract: In accordance with some embodiments of the present invention, a method of adaptively operating a transmit detection circuit is presented. The method includes powering the transmit detection circuit with a capacitor charged by an LDO; receiving a digital ping signal from a transmitter; receiving a clock signal from a local oscillator; updating a register to accommodate timing of the digital ping signal; and generating a signal indicating whether the transmitter is present.
    Type: Application
    Filed: August 16, 2018
    Publication date: May 9, 2019
    Inventors: Rui Liu, Lijie Zhao
  • Publication number: 20190131815
    Abstract: In some embodiments, a wireless power charging circuit includes a wireless power receiver configured to receive wireless power from a receive coil and to produce a first voltage; an open loop capacitor divider coupled to receive the first voltage from the wireless power receiver and configured to provide a second voltage, the second voltage being reduced from the first voltage; and a linear battery charger coupled to receive the second voltage from the open loop capacitor and configured to provide a charging voltage to provide to a battery coupled to the system.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 2, 2019
    Inventors: Rui LIU, Lijie ZHAO
  • Publication number: 20190058392
    Abstract: A rectifier circuit can include a plurality of FETs arranged as a rectifier; and a start-up circuit applied to each of the plurality of FETs that turn each of the FETs off during a circuit startup period, wherein the start-up circuit provides a large impedance for low power dissipation during normal operation of the rectifier.
    Type: Application
    Filed: February 15, 2018
    Publication date: February 21, 2019
    Inventors: Lijie ZHAO, Yue WANG, Stephen ULBRICH
  • Publication number: 20190012586
    Abstract: In accordance with aspects of the present invention, a magnetic secured transmission system is presented. A magnetic secure transmission (MST) system can include a full-bridge driver that includes four transistors configured to regulate current through a coil; and a driving controller coupled to drive the full-bridge driver at a high frequency. In some embodiments, the transistors in the full bridge regulator are driven with a high frequency pulsed-wave modulated (PWM) signal to control the current through the coil. A method of magnetic secured transmission (MST) of MST data according to some embodiments includes receiving the MST data; generating coil data in response to the MST data; driving transistors in a full bridge at a high frequency to drive current through a coil according to the coil data.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Inventors: Rui LIU, Tao QI, Lijie ZHAO