Patents by Inventor Jianhui Lin

Jianhui Lin 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: 11071183
    Abstract: A lighting apparatus is connected to a dimmer and an external power source. The lighting apparatus includes a light source and a driver. The driver is used for converting the external power source to a driving current supplied to the light source. The driver includes a rectifier module, a constant voltage module, a control module, a constant current module, and a power module. The rectifier module is connected to the dimmer for rectifying a dimming voltage to a rectified voltage. The constant voltage module is connected to the rectifier module for providing a first constant voltage power according to the rectified voltage.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: July 20, 2021
    Assignee: XIAMEN LEEDARSON LIGHTING CO.LTD.
    Inventors: Hongji Chen, Hongbu Lin, Jianhui Cao
  • Patent number: 10797687
    Abstract: The present invention relates to a signal duty cycle adaptive-adjustment circuit and method for a receiving terminal. In one embodiment, the circuit includes an analog level comparison circuit, a preprocessing circuit, a first path switch, a second path switch, a decoding circuit, a parameter extraction and estimation circuit, an error generation circuit, a filter feedback circuit and a digital-to-analog conversion circuit. The analog level comparison circuit receives a valid signal according to a reference level to generate a duty cycle signal. The preprocessing circuit preprocesses the duty cycle signal. When the first path switch is turned on, the parameter extraction and estimation circuit acquires duty cycle information from the duty cycle signal to generate a duty cycle deviation. The error generation circuit processes the duty cycle deviation to generate an error signal.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: October 6, 2020
    Assignee: INTERNATIONAL GREEN CHIP (TIANJIN) CO., LTD
    Inventors: Junning Wang, Jianhui Lin
  • Publication number: 20200162065
    Abstract: The present invention relates to a signal duty cycle adaptive-adjustment circuit and method for a receiving terminal. In one embodiment, the circuit includes an analog level comparison circuit, a preprocessing circuit, a first path switch, a second path switch, a decoding circuit, a parameter extraction and estimation circuit, an error generation circuit, a filter feedback circuit and a digital-to-analog conversion circuit. The analog level comparison circuit receives a valid signal according to a reference level to generate a duty cycle signal. The preprocessing circuit preprocesses the duty cycle signal. When the first path switch is turned on, the parameter extraction and estimation circuit acquires duty cycle information from the duty cycle signal to generate a duty cycle deviation. The error generation circuit processes the duty cycle deviation to generate an error signal.
    Type: Application
    Filed: November 24, 2017
    Publication date: May 21, 2020
    Applicant: INTERNATIONAL GREEN CHIP (TIANJIN) CO., LTD
    Inventors: Junning WANG, Jianhui LIN
  • Publication number: 20180248504
    Abstract: A brush-less DC motor control device includes a position detecting unit that detects the position of a motor rotor and acquires the position signals of the rotor, a reference generating unit that selects a reference time moment according to the rotor's position signal, a current measuring unit that measures the phase current of the motor and acquires the phase current at the reference time moment according to the measured phase current, a calculation unit that calculates the direct axis current of the motor according to the acquired phase current, a phase adjusting unit that adjusts the phase of the drive voltage of a motor coil according to the difference value between the direct axis current of the motor and an expected target current, and a drive unit that outputs drive signals of the motor coil according to the acquired position signal and the phase of the coil's drive voltage.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 30, 2018
    Applicant: INTERNATIONAL GREEN CHIP (TIANJIN) CO., LTD.
    Inventors: Jianhui LIN, Weixin ZHANG, Weizheng XU
  • Patent number: 9923507
    Abstract: The present invention discloses a position-sensorless control method for a brushless motor, the method including: turning off a first driving voltage of a first phase coil, and within detection time, detecting a back electromotive force of the first phase coil; determining a reference phase and a cycle of a second driving voltage according to the back electromotive force; determining a pulse width modulation signal according to the reference phase and the cycle; and determining to provide the second driving voltage for the brushless motor according to the pulse width modulation signal, the second driving voltage being used to drive the brushless motor. The present invention effectively reduces the cost, decreases implementation difficulty and increases system performance and reliability.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 20, 2018
    Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Jianhui Lin, Weixin Zhang
  • Publication number: 20170163205
    Abstract: The present invention discloses a position-sensorless control method for a brushless motor, the method including: turning off a first driving voltage of a first phase coil, and within detection time, detecting a back electromotive force of the first phase coil; determining a reference phase and a cycle of a second driving voltage according to the back electromotive force; determining a pulse width modulation signal according to the reference phase and the cycle; and determining to provide the second driving voltage for the brushless motor according to the pulse width modulation signal, the second driving voltage being used to drive the brushless motor. The present invention effectively reduces the cost, decreases implementation difficulty and increases system performance and reliability.
    Type: Application
    Filed: August 26, 2015
    Publication date: June 8, 2017
    Applicant: International Green Chip (Tianjin) Co., Ltd.
    Inventors: Jianhui LIN, Weixin ZHANG
  • Patent number: 9116033
    Abstract: A verification system for a large-scale weighing machine comprises at least four tension frameworks penetrating through a weighing platform hole preset on a weighing platform surface of the weighing machine, for connecting to a weighing platform foundation and being disposed perpendicular to the weighing platform surface, at least four self-adjusting loading-unloading load measuring devices disposed corresponding to the tension frameworks, and a constant-load control device connected with the loading-unloading mechanism and allows the loading-unloading mechanism to maintain constant applied load while loading. The self-adjusting loading-unloading load measuring devices includes a self-adjusting loading-unloading mechanism and a high-precision load measuring instrument adjacent to the top side of the loading-unloading mechanism. The high-precision load measuring instrument is at least three times larger than an accuracy of the weighing machine.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: August 25, 2015
    Assignee: FUJIAN METROLOGY INSTITUTE
    Inventors: Jianhui Lin, Jiankang Song, Jinhui Yao, Hui Chi
  • Patent number: 9097574
    Abstract: A method for calibrating large fixed electronic scale is provided. The method applies an auxiliary verification device to calibrate the large fixed electronic scale without using a weight and includes following steps of: loading and unloading every supporting point on the scale table board of the scale by at least one self-locating loading and unloading mechanism; measuring and displaying a load that each loading and unloading mechanisms applies to the scale table board by at least one high accuracy load gauge; controlling a size of the load that each loading and unloading mechanisms applies to the scale table board by a constant load control device; and comparing a precise load displayed by the high accuracy load gauge with a gauge weighing display value of the scale to obtain a calibration error of the scale. The present method greatly improves working efficiency and safety and reduces costs.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: August 4, 2015
    Assignee: FUJIAN METROLOGY INSTITUTE
    Inventors: Jinhui Yao, Qin Lin, Jianhui Lin, Hui Chi
  • Publication number: 20130104620
    Abstract: A verification system for a large-scale weighing machine comprises at least four tension frameworks penetrating through a weighing platform hole preset on a weighing platform surface of the weighing machine, for connecting to a weighing platform foundation and being disposed perpendicular to the weighing platform surface, at least four self-location loading-unloading load measuring devices disposed corresponding to the tension frameworks, and a constant-load control device connected with the loading-unloading mechanism and allows the loading-unloading mechanism to maintain constant applied load while loading. The self-location loading-unloading load measuring devices includes a self-location loading-unloading mechanism and a high-precision load measuring instrument adjacent to the top side of the loading-unloading mechanism. The high-precision load measuring instrument is at least three times larger than an accuracy of the weighing machine.
    Type: Application
    Filed: May 30, 2011
    Publication date: May 2, 2013
    Inventors: Jianhui Lin, Jiankang Song, Jinhui Yao, Hui Chi
  • Publication number: 20130098136
    Abstract: A method for calibrating large fixed electronic scale is provided. The method applies an auxiliary verification device to calibrate the large fixed electronic scale without using a weight and includes following steps of: loading and unloading every supporting point on the scale table board of the scale by at least one self-locating loading and unloading mechanism; measuring and displaying a load that each loading and unloading mechanisms applies to the scale table board by at least one high accuracy load gauge; controlling a size of the load that each loading and unloading mechanisms applies to the scale table board by a constant load control device; and comparing a precise load displayed by the high accuracy load gauge with a gauge weighing display value of the scale to obtain a calibration error of the scale. The present method greatly improves working efficiency and safety and reduces costs.
    Type: Application
    Filed: May 30, 2011
    Publication date: April 25, 2013
    Applicant: FUJIAN METROLOGY INSTITUTE
    Inventors: Jinhui Yao, Qin Lin, Jianhui Lin, Hui Chi