Patents by Inventor Jianxin Wang

Jianxin Wang 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).

  • LED DRIVING CIRCUIT HAVING SCR DIMMER, APPARATUS AND CONTROL METHOD THEREOF
    Publication number: 20180295685
    Abstract: An apparatus can include: a bleeder circuit coupled to a DC bus of an LED driving circuit having an SCR dimmer; the bleeder circuit being configured to stabilize a voltage of the DC bus at a predetermined value by drawing a bleed current through a bleed path in a first mode, and to cut off the bleed path in a second mode; and a controller configured to control the bleeder circuit to be in the first mode before the SCR dimmer is turned on, and to switch to the second mode after the SCR dimmer is turned on, where the predetermined value is greater than zero.
    Type: Application
    Filed: March 26, 2018
    Publication date: October 11, 2018
    Inventors: Jianxin Wang, Huiqiang Chen
  • SERVICE-FUNCTION CHAINING USING EXTENDED SERVICE-FUNCTION CHAIN PROXY FOR SERVICE-FUNCTION OFFLOAD
    Publication number: 20180295053
    Abstract: An extended service-function chain (SFC) proxy is hosted on a network node and connected to a service path formed by one or more network nodes hosting a chain of service-functions applied to packets traversing the service path. The packets each include a service header having a service path identifier and a service index. A packet of a traffic flow destined for a service-function is received from the service path and sent to the service-function. An indication to offload the traffic flow is received from the service-function. The indication is stored in a flow table having entries each identifying a respective traffic flow. A subsequent packet of the traffic flow is received from the service path. The flow table is searched for the indication to offload the traffic flow. Upon finding the indication, the service-function is bypassed, and the subsequent packet is forwarded along the service path.
    Type: Application
    Filed: April 10, 2017
    Publication date: October 11, 2018
    Inventors: Kent Leung, Jianxin Wang
  • Control circuit, control method and flyback converter
    Patent number: 10097076
    Abstract: In one embodiment, a control circuit can include: a voltage feedback circuit configured to obtain a voltage feedback signal that represents an output voltage of the power stage circuit; a set signal generator configured to output a set signal when a secondary current crosses zero or a voltage sampling signal reaches a valley value; a reset signal generator configured to output a reset signal in a constant on time mode when the voltage feedback signal is greater than a first voltage threshold value, and to output the reset signal in a peak current mode when the voltage feedback signal is less than the first voltage threshold value; and a logic circuit configured to activate a switching control signal according to the set signal, and to deactivate the switching control signal according to the reset signal.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 9, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • CONTROL CIRCUIT, CONTROL METHOD AND FLYBACK CONVERTER OF PRIMARY-SIDE FEEDBACK CONTROL THEREOF
    Publication number: 20180248487
    Abstract: The disclosure relates to a control circuit, a control method and a flyback converter of primary-side feedback control including the control circuit. When an input voltage is greater than a predetermined threshold, a peak value of an input current of the flyback converter is controlled to vary with the input voltage by the switching control signal. When the input voltage is less than the predetermined threshold, the peak value of the input current is controlled to be increased by the switching control signal to make demagnetization time of a secondary winding of the flyback converter be greater than a minimum time. Thus, the peak value of the primary-side current may not become too small because of a decreased input voltage, further avoiding occurrence of an error sampling after a blanking time due to excessive variations in demagnetization time.
    Type: Application
    Filed: April 30, 2018
    Publication date: August 30, 2018
    Inventors: Huiqiang Chen, Jianxin Wang
  • PREFETCH INTRUSION DETECTION SYSTEM
    Publication number: 20180234453
    Abstract: In one embodiment, a device in a network generates a machine learning-based traffic model using data indicative of a particular node in the network attempting to retrieve content from a particular resource in the network. The device predicts, using the traffic model, a time at which the particular node is expected to attempt retrieving future content from the particular resource. The device causes the future content from the particular resource to be prefetched in the network prior to the predicted time. The device makes a security assessment of the prefetched content. The device causes performance of a mitigation action in the network based on the security assessment of the prefetched content and in response to the particular node attempting to retrieve the future content from the particular resource.
    Type: Application
    Filed: February 15, 2017
    Publication date: August 16, 2018
    Inventors: Meixing Le, Jin Teng, Soumya Kumar Kalahasti, Jianxin Wang
  • Control circuit, control method and flyback converter of primary-side feedback control thereof
    Patent number: 9960691
    Abstract: The disclosure relates to a control circuit, a control method and a flyback converter of primary-side feedback control including the control circuit. On the basis of the current sampling signal feedback, the flyback converter of primary-side feedback control is controlled to operate in a constant on time mode when the input voltage is large, and is controlled to operate in a peak current mode when the input voltage is close to a valley. Thus, the peak value of the primary-side current may not become too small because of a decreased input voltage, further avoiding occurrence of an error sampling after a blanking time due to excessive variations in demagnetization time.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 1, 2018
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD.
    Inventors: Huiqiang Chen, Jianxin Wang
  • Metconazole-containing pesticide composition for preventing and controlling fusarium head blight and application thereof
    Patent number: 9949479
    Abstract: It relates to a pesticide composition for preventing and controlling fusarium head blight, which contains 1 to 150 parts by weight of jinggangmycin and 1 to 20 parts by weight of metconazole per mu. The pesticide composition of the present invention has an obvious synergistic effect when used for preventing and controlling fusarium head blight, and can remarkably enhance the effect of preventing and controlling head blight, increasing the ability of the human being in preventing and controlling head blight of triticeae crops.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 24, 2018
    Assignee: NANJING AGRICULTURAL UNIVERSITY
    Inventors: Mingguo Zhou, Yabing Duan, Jianxin Wang
  • Control circuit, control method and primary-controlled flyback converter using the same
    Patent number: 9954450
    Abstract: In one embodiment, a control circuit configured to control a power stage circuit of a primary-controlled flyback converter, can include: (i) a current sense circuit that generates a current sense signal by sampling a primary current; (ii) a voltage sense circuit that generates a voltage sense signal by sampling an auxiliary voltage after a blanking time has elapsed; (iii) a control signal generator that generates a switch control signal according to the voltage sense signal and the current sense signal; and (iv) the switch control signal being configured to control a power switch of the power stage circuit, where the switch control signal is active during a constant on time.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: April 24, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • CONTROL CIRCUIT, CONTROL METHOD AND LED DRIVING CIRCUIT THEREOF
    Publication number: 20180084619
    Abstract: A control circuit for an LED driving circuit having a rectifier and a power transistor for driving an LED load, can include: a control signal regulation circuit configured to control a driving voltage of the power transistor to vary with a rectifier output voltage to control the variation of a current flowing through the power transistor to be consistent with that of the rectifier output voltage to decrease a power loss of the power transistor; and the control signal regulation circuit being configured to control the driving voltage of the power transistor to vary with the rectifier output voltage to control the variation of the current flowing through the power transistor to be opposite to that of the rectifier output voltage to improve a power factor of the LED driving circuit.
    Type: Application
    Filed: December 1, 2017
    Publication date: March 22, 2018
    Inventors: Jianxin Wang, Huiqiang Chen
  • LED driving circuit
    Patent number: 9924569
    Abstract: An LED driving circuit for driving an LED load including N LED strings, where N is a positive integer no less than 2, can include: (i) a power converter having a power switch; (ii) a constant current control circuit that controls a switching operation of the power switch such that the power converter generates a driving current for the LED load; (iii) N control switches respectively coupled in series to the N LED strings; (iv) a PWM signal generator configured to generate N color tuning PWM signals; and (v) a color tuning control circuit configured to output N switching control signals according to the N color tuning PWM signals, to control switching operations of the N control switches, to regulate a ratio of a current through each LED string of the LED load to the driving current, and to regulate the color temperature of the LED load.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 20, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Hongbin Lai, Wei Chen
  • METCONAZOLE-CONTAINING PESTICIDE COMPOSITION FOR PREVENTING AND CONTROLLING FUSARIUM HEAD BLIGHT AND APPLICATION THEREOF
    Publication number: 20180049436
    Abstract: It relates to a pesticide composition for preventing and controlling fusarium head blight, which contains 1 to 150 parts by weight of jinggangmycin and 1 to 20 parts by weight of metconazole per mu. The pesticide composition of the present invention has an obvious synergistic effect when used for preventing and controlling fusarium head blight, and can remarkably enhance the effect of preventing and controlling head blight, increasing the ability of the human being in preventing and controlling head blight of triticeae crops.
    Type: Application
    Filed: May 11, 2016
    Publication date: February 22, 2018
    Inventors: Mingguo ZHOU, Yabing DUAN, Jianxin WANG
  • Control circuit, control method and LED driving circuit thereof
    Patent number: 9872355
    Abstract: A control circuit for an LED driving circuit having a rectifier and a power transistor for driving an LED load, can include: a control signal regulation circuit configured to control a driving voltage of the power transistor to vary with a rectifier output voltage to control the variation of a current flowing through the power transistor to be consistent with that of the rectifier output voltage to decrease a power loss of the power transistor; and the control signal regulation circuit being configured to control the driving voltage of the power transistor to vary with the rectifier output voltage to control the variation of the current flowing through the power transistor to be opposite to that of the rectifier output voltage to improve a power factor of the LED driving circuit.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: January 16, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Huiqiang Chen
  • FASTPATH WEB SESSIONS WITH HTTP HEADER MODIFICATION BY REDIRECTING CLIENTS
    Publication number: 20170339253
    Abstract: A handshake procedure to establish a first connection between a client and a server is monitored at an intermediate network device. A request message sent to the server from the client is received at the intermediate network device. The request message includes parameters defining a manner of receiving information from the server. The parameters defining the manner of receiving information from the server are modified to produce modified parameters. A redirect message is sent from the intermediate network device to the client to induce or cause the client to establish a second connection with the server based upon the modified parameters, wherein the redirect message contains the modified parameters.
    Type: Application
    Filed: May 18, 2016
    Publication date: November 23, 2017
    Inventors: Manish Pathak, Venkatesh N. Gautam, Jianxin Wang
  • CONTROL CIRCUIT, CONTROL METHOD AND FLYBACK CONVERTER
    Publication number: 20170338729
    Abstract: In one embodiment, a control circuit can include: a voltage feedback circuit configured to obtain a voltage feedback signal that represents an output voltage of the power stage circuit; a set signal generator configured to output a set signal when a secondary current crosses zero or a voltage sampling signal reaches a valley value; a reset signal generator configured to output a reset signal in a constant on time mode when the voltage feedback signal is greater than a first voltage threshold value, and to output the reset signal in a peak current mode when the voltage feedback signal is less than the first voltage threshold value; and a logic circuit configured to activate a switching control signal according to the set signal, and to deactivate the switching control signal according to the reset signal.
    Type: Application
    Filed: August 9, 2017
    Publication date: November 23, 2017
    Inventors: Huiqiang Chen, Jianxin Wang
  • GENERATING PACKETS IN A REVERSE DIRECTION OF A SERVICE FUNCTION CHAIN
    Publication number: 20170317926
    Abstract: Embodiments are directed to receiving an original packet at a service function; determining, for a reverse packet, a reverse service path identifier for a previous hop on a service function chain; determining, for the reverse packet, a service index for the reverse service path identifier; and transmitting the reverse packet to the previous hop on the service function chain.
    Type: Application
    Filed: May 20, 2016
    Publication date: November 2, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Reinaldo Penno, Carlos M. Pignataro, Paul Quinn, Hung The Chau, Chui-Tin Yen, Vivek Kansal, Jianxin Wang, Kent K. Leung
  • CONTROL CIRCUIT, CONTROL METHOD AND LED DRIVING CIRCUIT THEREOF
    Publication number: 20170318639
    Abstract: A control circuit for an LED driving circuit having a rectifier and a power transistor for driving an LED load, can include: a control signal regulation circuit configured to control a driving voltage of the power transistor to vary with a rectifier output voltage to control the variation of a current flowing through the power transistor to be consistent with that of the rectifier output voltage to decrease a power loss of the power transistor; and the control signal regulation circuit being configured to control the driving voltage of the power transistor to vary with the rectifier output voltage to control the variation of the current flowing through the power transistor to be opposite to that of the rectifier output voltage to improve a power factor of the LED driving circuit.
    Type: Application
    Filed: April 24, 2017
    Publication date: November 2, 2017
    Inventors: Jianxin Wang, Huiqiang Chen
  • System and method for remote monitoring of document processing device
    Patent number: 9762758
    Abstract: A system and method for monitoring of document processing devices for scheduling of service includes a processor, associated memory and a network interface. The network interface is in data communication with a plurality of identifiable multifunction peripherals. Contact data maps each multifunction peripheral to at least one designated contact is stored in the memory. The network interface receives status data from each of the plurality of multifunction peripherals which is stored in the memory. A statistical engine, including the processor and memory calculates trend data from stored status data and generates alerts corresponding to identified multifunction peripherals in accordance with an analysis of the trend data. The network interface communicates the alerts to at least one designated contact in accordance with each identified multifunction peripheral and the contact data.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: September 12, 2017
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Jianxin Wang, Louis Ormond
  • Control circuit, control method and flyback converter
    Patent number: 9762113
    Abstract: In one embodiment, a control circuit can include: a voltage feedback circuit configured to obtain a voltage feedback signal that represents an output voltage of the power stage circuit; a set signal generator configured to output a set signal when a secondary current crosses zero or a voltage sampling signal reaches a valley value; a reset signal generator configured to output a reset signal in a constant on time mode when the voltage feedback signal is greater than a first voltage threshold value, and to output the reset signal in a peak current mode when the voltage feedback signal is less than the first voltage threshold value; and a logic circuit configured to activate a switching control signal according to the set signal, and to deactivate the switching control signal according to the reset signal.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: September 12, 2017
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • MULTICHANNEL CONSTANT CURRENT LED CONTROLLING CIRCUIT AND CONTROLLING METHOD
    Publication number: 20170238383
    Abstract: A multichannel constant current LED controlling circuit can include: (i) a control loop configured to generate a first control signal in accordance with a current feedback signal that represents a driving current flowing through an LED load, where the LED load comprises a plurality of LED strings coupled in series; (ii) a loop steady state network comprising a plurality of steady state holding components configured to hold a plurality of steady state control signals that correspond to a plurality of load states of the LED load, where when a state of the LED load varies, at least one of the steady state holding components is selected by the control loop to generate the first control signal; and (iii) a power switching transistor of a power stage circuit configured to generate a pseudo-constant output current to drive the LED load.
    Type: Application
    Filed: May 5, 2017
    Publication date: August 17, 2017
    Inventors: Hongbin Lai, Jianxin Wang
  • Methods and Apparatus for Verifying Transport Layer Security Server by Proxy
    Publication number: 20170223054
    Abstract: A proxy device intercepts a client transport layer security message including a server name indicator from a client device. The first client transport layer security message is addressed to a server. The proxy device generates a second client transport layer security message including the server name indicator from the first client transport layer security message and sends the second client transport layer security message to the server. The proxy device receives a certificate from the server, validates its identity, and performs policy functions based on that identity.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 3, 2017
    Inventors: Daniel Wing, Jianxin Wang, Venkatesh Narsipur Gautam