Patents by Inventor Liqiang Hu

Liqiang Hu 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: 10152353
    Abstract: The present disclosure discloses system resource allocating method and device based on account activity level, wherein the method includes: acquiring an account activity level parameter of a user and calculating an account activity level of each user according to the account activity level parameter of the user; determining an account activity level rank of each user according to the account activity level of the user and a preset account activity level rank dividing manner; establishing an account activity level index of each user according to a user number, the account activity level and the account activity level rank of the user; allocating the system resource for performing the information processing to a target user according to the account activity level index of the target user, where the information processing is to be performed on the target user.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: December 11, 2018
    Assignee: China Construction Bank Corporation
    Inventors: Jinxin Zhao, Kezun Liang, Wei Wang, Shunhua Zhang, Liqiang Hu, Xiaoyu Xie, Yinghui Lu, Nan Wang, Ran Tao, Shusheng Chen
  • Publication number: 20170153917
    Abstract: The present disclosure discloses system resource allocating method and device based on account activity level, wherein the method includes: acquiring an account activity level parameter of a user and calculating an account activity level of each user according to the account activity level parameter of the user; determining an account activity level rank of each user according to the account activity level of the user and a preset account activity level rank dividing manner; establishing an account activity level index of each user according to a user number, the account activity level and the account activity level rank of the user; allocating the system resource for performing the information processing to a target user according to the account activity level index of the target user, where the information processing is to be performed on the target user.
    Type: Application
    Filed: December 22, 2016
    Publication date: June 1, 2017
    Inventors: Jinxin ZHAO, Kezun LIANG, Wei WANG, Shunhua ZHANG, Liqiang HU, Xiaoyu XIE, Yinghui LU, Nan WANG, Ran TAO, Shusheng CHEN
  • Patent number: 9271347
    Abstract: A TRIAC dimmable light-emitting diode (LED) driver circuit is disclosed, compromising: An alternating-current (AC) voltage connected to a rectifier bridge; An LED load, which is connected to an inductor or a transformer, a power MOS transistor, a low voltage MOS transistor and a current sensing resistor. The LED driver also compromises: a peak current comparator which is used to compare the voltage between a current sensing resistor and a reference voltage; a maximum on-time timer, which is used to detect the on time of the low voltage MOS transistor. When the voltage on the current sensing resistor is higher than the reference voltage or the on time of the low voltage MOS transistor reaches the preset time of the maximum on-time timer, the low voltage MOS transistor is turned off.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: February 23, 2016
    Assignee: Shanghai Bright Power Semiconductor Co., Ltd.
    Inventors: Shungen Sun, Liqiang Hu
  • Patent number: 9107260
    Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 11, 2015
    Assignee: Shanghai Bright Power Semiconductor Co., Ltd.
    Inventors: Shungen Sun, Deshui Yu, Liqiang Hu
  • Publication number: 20150002036
    Abstract: A TRIAC dimmable light-emitting diode (LED) driver circuit is disclosed, compromising: An alternating-current (AC) voltage connected to a rectifier bridge; An LED load, which is connected to an inductor or a transformer, a power MOS transistor, a low voltage MOS transistor and a current sensing resistor. The LED driver also compromises: a peak current comparator which is used to compare the voltage between a current sensing resistor and a reference voltage; a maximum on-time timer, which is used to detect the on time of the low voltage MOS transistor. When the voltage on the current sensing resistor is higher than the reference voltage or the on time of the low voltage MOS transistor reaches the preset time of the maximum on-time timer, the low voltage MOS transistor is turned off.
    Type: Application
    Filed: August 20, 2013
    Publication date: January 1, 2015
    Applicant: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Shungen Sun, Liqiang Hu
  • Publication number: 20140354186
    Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.
    Type: Application
    Filed: September 27, 2013
    Publication date: December 4, 2014
    Applicant: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Shungen Sun, Deshui Yu, Liqiang Hu
  • Publication number: 20140111093
    Abstract: An average linear light-emitting diode (LED) driver circuit is disclosed. An inputting alternating-current (AC) voltage is connected to a rectifier bridge. An LED load is paralleled with a filtering capacitor and connected to a power switch. A compensation network and a voltage feedback network are included. When the output voltage of the rectifier bridge is higher than the voltage of the filtering capacitor, the drain voltage of the power switch is increased. The voltage feedback network decreases or turns off the current in the power switch. The compensation network controls the average current in the power switch to be equal to the desired LED load current. The average linear LED driver circuit intelligently controls the driver current, reduces the system power loss and increases the system efficiency. The LED driver maintains high conversion efficiency, especially under wide input voltage conditions.
    Type: Application
    Filed: August 12, 2013
    Publication date: April 24, 2014
    Applicant: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Shungen Sun, Liqiang Hu
  • Publication number: 20080303493
    Abstract: Embodiments of the present invention include a method of starting a boost regulator comprising during an initial phase beginning when the boost regulator is powered off, coupling a first current from the input node to the output node to increase a voltage on the capacitor to a first voltage level, during a second phase following the first phase, switching the PMOS transistor and the NMOS transistor, during a third phase following the second phase, turning said PMOS off and switching said NMOS transistor, and during a fourth phase, synchronously switching the PMOS transistor and NMOS transistor.
    Type: Application
    Filed: December 14, 2007
    Publication date: December 11, 2008
    Applicant: PacificTech Microelectronics, Inc.
    Inventors: Liqiang Hu, Weili Yang, Jing Wang