Patents by Inventor Yancun Li

Yancun Li 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: 20220311331
    Abstract: An energy storage circuit configured to filter a rectified voltage provided on an input bus, and to provide an input voltage on the input bus, having: a first capacitor, coupled between the input bus and a ground potential; a second capacitor; and a second capacitor control switch, coupled in series with the second capacitor, wherein the second capacitor and second capacitor control switch are coupled between the input bus and the ground potential; wherein the second capacitor control switch is turned on when an input voltage provided by the input bus is lower than a reference voltage to couple the second capacitor in parallel with the first capacitor.
    Type: Application
    Filed: March 29, 2021
    Publication date: September 29, 2022
    Inventor: Yancun Li
  • Patent number: 11031876
    Abstract: An energy recycle circuit for a flyback circuit and method thereof. The energy recycle circuit has an auxiliary switch coupled in series to a clamp capacitor to form a branch, and the branch is coupled in parallel with the primary winding, or with the primary switch. The energy recycle circuit further has a recycle control circuit to generate an auxiliary switching signal. The auxiliary switch is turned on during a charging process of the clamp capacitor, and is turned off at an end of an immediate subsequent discharging process of the clamp capacitor. The charging process of the clamp capacitor is timed at a first length of time, and the immediate subsequent discharging process of the clamp capacitor is timed at a second length of time, based on an auxiliary switch current signal. The second length of time is adjustable to have an equal time length with the first length of time, or have a unequal time length with the first length of time.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: June 8, 2021
    Assignee: Monolithic Power Systems, Inc.
    Inventor: Yancun Li
  • Patent number: 10763752
    Abstract: A method of controlling a flyback circuit and control circuit thereof. The flyback circuit has a transformer having a primary winding and an auxiliary winding, and the primary winding and the auxiliary winding have opposite dot orientations with each other. During a switching cycle, a primary switch coupled to the primary winding is turned off; then, an auxiliary switch coupled to the auxiliary winding is turned on when, after an elapse of a predetermined waiting time counted from a predetermined moment in an immediate preceding switching cycle, an auxiliary switch voltage signal decreases to a valley of the auxiliary switch voltage signal. The auxiliary switch is turned off when the auxiliary switch current signal increases to a reference current. The primary switch is turned on when a primary switch voltage signal decreases to a valley of the primary switch voltage signal.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: September 1, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yancun Li
  • Patent number: 8158440
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of thyroid hormones and related antibodies in a serum sample, which can be used to evaluate thyroid functions and to diagnose thyroid diseases. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies and antigens used for the detection of respective thyroid hormones and related antibodies in a serum sample.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: April 17, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8158342
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively measure the presence of HIV related antibodies in a serum sample for the diagnosis of HIV infection. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of HIV related antigens used for the diagnosis of HIV infection.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: April 17, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8158343
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively detect the presence of respiratory tract viruses-related immunological markers in a serum sample, which can be used for the diagnosis of respiratory tract infections. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of representative antigens used to detect the respective respiratory tract viruses-related immunological markers (antibodies) in blood for the diagnosis of respiratory tract infections.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: April 17, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8153445
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively detect the presence of infectious agent related antibodies and/or antigens in a serum sample, which can be used to screen for infectious agents in blood. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antigens and antibodies used for the screening of infectious agents in blood.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: April 10, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8114682
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different sex hormones in a serum sample, which can be used to evaluate different clinical situations. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies used for the detection of representative sex hormones in a serum sample.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: February 14, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8110409
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different liver fibrosis-associated serum biomarkers in a serum sample, which can be used for the diagnosis of liver fibrosis. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies used for the detection of liver fibrosis-associated serum biomarkers for the diagnosis of liver fibrosis.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: February 7, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Patent number: 8110408
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of diabetes related immunological makers in a serum sample, which can be used to diagnose and/or early diagnose diabetes as well as to predict the onset risk of diabetes in first-degree relatives. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antigens and antibodies used for the detection of respective diabetes related immunological makers in a serum sample.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: February 7, 2012
    Assignee: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100086920
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different tumor markers in a serum sample, which can be used to screen for and determine susceptibility to cancer as well as for the differential diagnosis of metastases from an unknown primary tumor. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of monoclonal antibodies used for cancer susceptibility assessment and for differential diagnosis of metastases from an unknown primary tumor.
    Type: Application
    Filed: July 27, 2007
    Publication date: April 8, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100086937
    Abstract: This invention discloses using SPR technology to qualitatively detect the presence of Treponema pallidum immunological markers in a serum sample, which can be used for the diagnosis of syphilis. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of representative antigens used to detect the respective Treponema pallidum immunological markers (antibodies) in blood for the diagnosis of syphilis.
    Type: Application
    Filed: September 7, 2007
    Publication date: April 8, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100047815
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different tumor markers in a protein sample extracted from tumor tissue, which can be used for the diagnosis of undifferentiated tumors. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of monoclonal antibodies used for detecting tumor markers in a tumor tissue sample and for the diagnosis of undifferentiated tumors.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 25, 2010
    Applicant: CMED Technologies Ltd.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100041018
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively measure the presence of HCV-associated immunological markers in a serum sample for the diagnosis of HCV infection. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of HCV related antigen proteins used for the diagnosis of HCV infection.
    Type: Application
    Filed: September 5, 2007
    Publication date: February 18, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100028856
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively measure the presence of HBV-associated immunological markers in a serum sample for the diagnosis of HBV infection. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of HBV related antigens or antibodies used for the diagnosis of HBV infection.
    Type: Application
    Filed: August 28, 2007
    Publication date: February 4, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100021930
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively detect the presence of serum markers in pregnant women for the purpose of screening for congenital birth defects. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of representative antibodies used to detect the respective serum markers in pregnant women for the purpose of maternal serum screening for congenital birth defects.
    Type: Application
    Filed: September 6, 2007
    Publication date: January 28, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100021882
    Abstract: This invention discloses using SPR technology to simultaneously and qualitatively detect the presence of respiratory tract viruses-related immunological markers in a serum sample, which can be used for the diagnosis of respiratory tract infections. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of representative antigens used to detect the respective respiratory tract viruses-related immunological markers (antibodies) in blood for the diagnosis of respiratory tract infections.
    Type: Application
    Filed: September 12, 2007
    Publication date: January 28, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100009464
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different sex hormones in a serum sample, which can be used to evaluate different clinical situations. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies used for the detection of representative sex hormones in a serum sample.
    Type: Application
    Filed: September 17, 2007
    Publication date: January 14, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20100004872
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different cardiac biochemical markers in a serum sample, which can be used for the early diagnosis of cardiovascular diseases and myocardial infarction. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies used for the detection of representative cardiac biochemical markers in a serum sample.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 7, 2010
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li
  • Publication number: 20090325190
    Abstract: This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of diabetes related immunological makers in a serum sample, which can be used to diagnose and/or early diagnose diabetes as well as to predict the onset risk of diabetes in first-degree relatives. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antigens and antibodies used for the detection of respective diabetes related immunological makers in a serum sample.
    Type: Application
    Filed: September 17, 2007
    Publication date: December 31, 2009
    Applicant: CMED TECHNOLOGIES LTD.
    Inventors: Zhong Chen, Ning Liu, Yancun Li