Patents by Inventor Jianning Sun

Jianning Sun 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: 10862312
    Abstract: An electrical energy router includes cascaded submodules. Each submodule of the cascaded submodules includes a rectifying stage and an isolating stage. The rectifying stage includes a structure of a neutral point clamped full bridge. The isolating stage includes a DC-DC converter, which includes a primary side, a secondary side and a transformer. The primary side includes a structure of a neutral point clamped half bridge. A DC side of the neutral point clamped half bridge is connected to a DC bus line of the rectifying stage.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: December 8, 2020
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Jianning Sun, Liqiang Yuan, Qing Gu, Kainan Chen, Zhengming Zhao
  • Publication number: 20200040481
    Abstract: A silicon wafer horizontal growth apparatus comprises a casing forming a cavity; a crucible within the cavity and having a melting zone, an overflow port, a first and a second overflow surface; a feeding assembly for adding raw material to the melting zone at an adjustable rate; a heating assembly comprising two movable heaters disposed on the upper and lower sides of the crucible at an interval; a thermal insulation component for maintaining a temperature in the cavity; a gas flow assembly comprising a jet located above the second overflow surface, a gas conductive graphite member mounted on the bottom of the crucible, a quartz exhaust tube connected with the gas conductive graphite member, and a quartz cooling tube outside the exhaust tube; and a heat insulating baffle located above the second overflow surface for isolating the heating assembly from the jet, dividing the cavity into hot and cold zones.
    Type: Application
    Filed: October 14, 2019
    Publication date: February 6, 2020
    Inventors: Jianning DING, Ningyi YUAN, Jiawei XU, Dapeng SHEN, Xiaodong XU, Tao SUN, Shubo WANG
  • Publication number: 20180351368
    Abstract: An electrical energy router includes cascaded submodules. Each submodule of the cascaded submodules includes a rectifying stage and an isolating stage. The rectifying stage includes a structure of a neutral point clamped full bridge. The isolating stage includes a DC-DC converter, which includes a primary side, a secondary side and a transformer. The primary side includes a structure of a neutral point clamped half bridge. A DC side of the neutral point clamped half bridge is connected to a DC bus line of the rectifying stage.
    Type: Application
    Filed: November 9, 2017
    Publication date: December 6, 2018
    Inventors: Jianning SUN, Liqiang YUAN, Qing GU, Kainan CHEN, Zhengming ZHAO
  • Patent number: 8963515
    Abstract: A current sensing circuit and the control circuit thereof and a power converter circuit. The current sensing circuit includes a sample and hold circuit (1), a rising edge detecting circuit (2), a falling edge detecting circuit (3), a timing control circuit (4), a synchronous detecting circuit (5) and a low pass filter (6). The power converter circuit uses the current sensing circuit to sense and process the current flowing through a main switch (S1).
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: February 24, 2015
    Assignee: Sunsun Lighting China Co. Ltd
    Inventor: Jianning Sun
  • Publication number: 20140183569
    Abstract: An LED chip unit and manufacturing method thereof, a LED module, an illuminating device and a display device. The LED chip unit includes a plurality of LED cores which are electrically isolated from each other. The LED chip unit is used for a cutting unit of an epitaxial wafer, so that scraping channels between the LED chip units are only reserved. The area which the space between the adjacent cores occupies is less than the scraping channel, so that utilization ratio of the epitaxial wafer is increased. The cores are integrated and the LED chip unit is packaged on the base plate as a basic unit, so that the cores are packaged on the base plate at a time thereby simplifying packaging.
    Type: Application
    Filed: May 11, 2011
    Publication date: July 3, 2014
    Applicant: SUNSUN LIGHTING CHINA CO., LTD.
    Inventor: Jianning Sun
  • Publication number: 20140016384
    Abstract: A current sensing circuit and the control circuit thereof and a power converter circuit. The current sensing circuit includes a sample and hold circuit (1), a rising edge detecting circuit (2), a falling edge detecting circuit (3), a timing control circuit (4), a synchronous detecting circuit (5) and a low pass filter (6). The power converter circuit uses the current sensing circuit to sense and process the current flowing through a main switch (S1).
    Type: Application
    Filed: March 15, 2011
    Publication date: January 16, 2014
    Applicant: SUNSUN LIGHTING CHINA CO. LTD
    Inventor: Jianning Sun
  • Publication number: 20140016381
    Abstract: The present invention provides a current detection circuit, a controlling circuit using the current detection circuit and a power conversion circuit using the controlling circuit, the current detection circuit comprises a sample keeping circuit, a rising edge detection circuit, a falling edge detection circuit, a sequential controlling circuit, a synchronous detection circuit and a lowpass filter. The inventive current detection circuit for the power conversion circuit obtains signals of the output current by detecting loop current of the master switch and processing the loop current.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 16, 2014
    Applicant: SUNSUN LIGHTING CHINA CO., LTD
    Inventor: Jianning SUN
  • Publication number: 20130033110
    Abstract: A power supply circuit with low-voltage control and a producing method thereof. The circuit includes an auxiliary power supply, a high-voltage startup unit, a switching circuit, and a control circuit. When the circuit is powered on, a storage capacitor in the switching circuit is charged by the high-voltage startup unit and supplies the control circuit with a low-voltage power source so that the control circuit is started up completely. After the circuit enters a normal operation state, the control circuit detects the voltage across the storage capacitor and dynamically controls the switching circuit to charge the storage capacitor so that a steady low-voltage power source supplied for the control circuit is obtained. Without reducing the efficiency of the power supply, the circuit is simplified and the cost is lowered.
    Type: Application
    Filed: January 24, 2011
    Publication date: February 7, 2013
    Applicant: SUNSUN LIGHTING CHINA CO., LTD.
    Inventor: Jianning Sun
  • Publication number: 20120153855
    Abstract: The present invention is adapted for the field of power supply and provides a circuit of LED driving power, LED driving power and LED lighting device, the circuit of LED driving power comprises a over-voltage protection unit, a AC input filter unit, a full-wave rectifier unit and a single-stage power conversion unit, where the single-stage power conversion unit comprises an auxiliary power supply circuit, a switching circuit and a control unit in which the auxiliary power supply circuit is used to provide auxiliary power supply for single power conversion stage, the switching circuit is used to control DC output by switching on and switching off and the control unit is used to control time point of turning on and turning off dynamically based on the information collected. The present invention can improve the overall efficiency of the LED driving power by controlling switching circuit dynamically in single-stage power conversion unit.
    Type: Application
    Filed: February 28, 2012
    Publication date: June 21, 2012
    Applicant: SMAR ANALOG TECHNOLOGY CO., LTD.
    Inventor: Jianning Sun