Patents by Inventor Liqiang Zhu

Liqiang Zhu 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: 20180295693
    Abstract: Systems and methods are provided for regulating one or more currents. An example system controller includes: a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature; and a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes. The modulation-and-driver component is further configured to, in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold.
    Type: Application
    Filed: April 2, 2018
    Publication date: October 11, 2018
    Inventors: Xiangkun Zhai, Liqiang Zhu, Qiang Luo
  • Publication number: 20180287501
    Abstract: Controller and method for a power converter. For example, the controller includes a first controller terminal coupled to a gate terminal of a transistor. The transistor further includes a drain terminal and a source terminal, and the first controller terminal is at a first voltage as a first function of time. Additionally, the controller includes a second controller terminal coupled to the source terminal. The second controller terminal is at a second voltage as a second function of time. Moreover, the controller includes a third controller terminal coupled to a first resistor terminal of a resistor. The resistor further includes a second resistor terminal, and the third controller terminal is at a third voltage as a third function of time. Also, the controller includes a fourth controller terminal coupled to a first capacitor terminal of a capacitor.
    Type: Application
    Filed: May 10, 2017
    Publication date: October 4, 2018
    Inventors: Liqiang ZHU, Lieyi FANG
  • Publication number: 20180288845
    Abstract: System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency.
    Type: Application
    Filed: March 23, 2018
    Publication date: October 4, 2018
    Inventors: Liqiang Zhu, Jun Zhou, Yongsheng Su, Lieyi Fang
  • Patent number: 10091847
    Abstract: System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: October 2, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou, Yongsheng Su, Lieyi Fang
  • Publication number: 20180262486
    Abstract: An input is received from a client device and is indicative of a desire to add a device for secure operations. Artifacts are generated and a quick response (QR) code is generated that represents the artifacts. The QR code is transmitted to the client device where it can be read by the device to be added, so the artifacts can be used in performing the secure operations.
    Type: Application
    Filed: March 9, 2017
    Publication date: September 13, 2018
    Inventors: Liqiang Zhu, Joel T. Hendrickson, Chang Chuen Kawaguchi
  • Patent number: 10063537
    Abstract: When a user inputs an action request, such as a requested command, to be performed on a target machine, a management system receives the request and verifies it with a separate authentication and permission system. The authentication and permission system verifies signatures on the request and signs it and generates an approved workflow package. The approved workflow package is sent to the target machine.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: August 28, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Liqiang Zhu, Rajalakshmi Dani
  • Publication number: 20180227288
    Abstract: The description relates to password reset security. One example can receive a login request and a password for a cloud-based user account. The example can also retrieve stored authenticated user information associated with the password. The example can further send a notification of the login request to a contact address associated with the cloud-based user account. The notification can contain at least some of the stored authenticated user information.
    Type: Application
    Filed: February 9, 2017
    Publication date: August 9, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Liqiang ZHU, Yi ZENG, Yu HUANG
  • Publication number: 20180132312
    Abstract: System controller and method for a power converter. For example, a system controller for a power converter includes a logic controller configured to generate a modulation signal, and a driver configured to receive the modulation signal, generate a drive signal based at least in part on the modulation signal, and output the drive signal to a switch to affect a current flowing through an inductive winding for a power converter. Additionally, the system controller includes a voltage-to-voltage converter configured to receive a first voltage signal, the modulation signal, and a demagnetization signal, and to generate a second voltage signal based at least in part on the first voltage signal, the modulation signal, and the demagnetization signal.
    Type: Application
    Filed: July 18, 2017
    Publication date: May 10, 2018
    Inventors: Zhuoyan LI, Liqiang Zhu, Jiqing Yang, Lieyi Fang
  • Publication number: 20180132317
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Application
    Filed: December 7, 2017
    Publication date: May 10, 2018
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Patent number: 9967941
    Abstract: Systems and methods are provided for regulating one or more currents. An example system controller includes: a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature; and a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes. The modulation-and-driver component is further configured to, in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: May 8, 2018
    Assignee: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Xiangkun Zhai, Liqiang Zhu, Qiang Luo
  • Publication number: 20180124885
    Abstract: A two-terminal IC chip and method thereof. For example, a two-terminal IC chip includes a first chip terminal, a second chip terminal, a first switch configured to receive a control signal, a first capacitor coupled to the first switch, a second switch configured to receive the control signal, a second capacitor coupled to the second switch, a third switch configured to receive the control signal, and a third capacitor coupled to the third switch. A first terminal voltage is a voltage of the first chip terminal, a second terminal voltage is a voltage of the second chip terminal, and a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 3, 2018
    Inventors: QIANG LUO, LIQIANG ZHU, ZHILIANG CHEN, LIEYI FANG
  • Publication number: 20180124886
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Application
    Filed: December 8, 2017
    Publication date: May 3, 2018
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Patent number: 9961734
    Abstract: System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: May 1, 2018
    Assignee: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Liqiang Zhu, Jun Zhou, Yongsheng Su, Lieyi Fang
  • Publication number: 20180103515
    Abstract: A two-terminal IC chip and method thereof. For example, a two-terminal IC chip includes a first chip terminal and a second chip terminal. A first terminal voltage is a voltage of the first chip terminal, a second terminal voltage is a voltage of the second chip terminal, and a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage. The chip is configured to allow a chip current to flow into the chip at the first chip terminal and out of the chip at the second chip terminal, or to flow into the chip at the second chip terminal and out of the chip at the first chip terminal. The chip current is larger than or equal to zero in magnitude. The chip is further configured to change a relationship between the chip voltage and the chip current with respect to time. The chip is an integrated circuit, and the chip does not include any additional chip terminal other than the first chip terminal and the second chip terminal.
    Type: Application
    Filed: December 8, 2017
    Publication date: April 12, 2018
    Inventors: Qiang Luo, Liqiang Zhu, Zhiliang Chen, Lieyi Fang
  • Publication number: 20180103520
    Abstract: Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.
    Type: Application
    Filed: December 8, 2017
    Publication date: April 12, 2018
    Inventors: LIQIANG ZHU, JIQING YANG, ZHUOYAN LI, LIEYI FANG
  • Publication number: 20180098396
    Abstract: Systems and methods are provided herein for current regulation. An example system controller includes: a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed; a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed; a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller; and an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 5, 2018
    Inventors: Meng Li, Mingli Kang, Liqiang Zhu, Lieyi Fang
  • Publication number: 20180063153
    Abstract: When a user inputs an action request, such as a requested command, to be performed on a target machine, a management system receives the request and verifies it with a separate authentication and permission system. The verified command request is sent to the target machine. An authentication worker on the target machine accesses a set of policies, local to the target machine, to identify a least privileged execution environment in which the requested command can be performed. The authentication worker on the target machine launches the requested command within the identified least privileged execution environment on the target machine.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 1, 2018
    Inventors: Liqiang Zhu, Anand Menon, Guanghui He, Jiahui Wang, Neil Shipp, Nick Voicu, Yi Zeng, Yu (Kyle) Huang, Rajalakshmi Dani, David Hetherington, Zhaoan Liu, Gavin Ackroyd
  • Patent number: 9900943
    Abstract: A two-terminal IC chip and method thereof. For example, a two-terminal IC chip includes a first chip terminal, a second chip terminal, a first switch configured to receive a control signal, a first capacitor coupled to the first switch, a second switch configured to receive the control signal, a second capacitor coupled to the second switch, a third switch configured to receive the control signal, and a third capacitor coupled to the third switch. A first terminal voltage is a voltage of the first chip terminal, a second terminal voltage is a voltage of the second chip terminal, and a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: February 20, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Qiang Luo, Liqiang Zhu, Zhiliang Chen, Lieyi Fang
  • Patent number: 9883557
    Abstract: A two-terminal IC chip and method thereof. For example, a two-terminal IC chip includes a first chip terminal and a second chip terminal. A first terminal voltage is a voltage of the first chip terminal, a second terminal voltage is a voltage of the second chip terminal, and a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage. The chip is configured to allow a chip current to flow into the chip at the first chip terminal and out of the chip at the second chip terminal, or to flow into the chip at the second chip terminal and out of the chip at the first chip terminal. The chip current is larger than or equal to zero in magnitude. The chip is further configured to change a relationship between the chip voltage and the chip current with respect to time. The chip is an integrated circuit, and the chip does not include any additional chip terminal other than the first chip terminal and the second chip terminal.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 30, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Qiang Luo, Liqiang Zhu, Zhiliang Chen, Lieyi Fang
  • Patent number: 9883562
    Abstract: Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: January 30, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jiqing Yang, Zhuoyan Li, Lieyi Fang